JPH0968672A - Head-mounted display device and driving method thereof - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A liquid crystal panel is used as an image display element to reduce power consumption, and it is compact and lightweight and highly portable, and can display not only a normal TV screen but also a PC screen. A wearable display device is realized. SOLUTION: Image data is input from an image information input source 3 such as a personal computer 1 or a video 2, and an interface section 6 including a control unit 5 and a power supply voltage supply circuit 4 performs preprocessing of the image data and the power supply voltage and connects them. The display unit 10 is configured to perform processing for transmitting the image data to the image display element 9 by the VIDEO circuit 8 by means of means 7 for transmission into the apparatus main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-mounted display device for enlarging a virtual image of an image formed by an image display device and visually recognizing it, and a method of driving the head-mounted display device, such as a data display of a personal computer or a video / laser disk. The present invention relates to a configuration for providing a good display as a monitor for a video display, its driving method, and a display screen adjusting method.

[0002]

2. Description of the Related Art In recent years, head-mounted display devices have been proposed in order to meet the demand for enhancing portability of video and data displays. As a typical example, OPTIC
A head-up display for amblyopia and the like described in the S & PHOTONICS NEWS August 1992 issue is known.

[0003]

The above head-mounted display device can display only a normal TV signal and cannot be connected to a personal computer, a small information device terminal, etc., and is a portable display / multimedia information device. As a result, it was not the optimum device that met the needs of the user. Also, since the CRT is used as the image display element, the device body becomes heavy,
It consumes a lot of power and lacks portability and portability. Furthermore, as described above, in the case of a device that is used by enlarging and displaying a screen for the visually impaired, a magnifying display device such as a projector,
Or, if a sufficient display quality is not secured, which is the same as a television using a large CRT, a low vision person will make more severe use of his eyes, and will give a feeling of fatigue and disgust.

The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to provide a driving method and a structure thereof which are small in size and light in weight, and which are highly portable and portable. Second, we realized a head-mounted display device that can minimize fatigue by improving workability, operability, and visibility while ensuring display quality equivalent to that of a large-sized panel and its driving method. It is to be.

[0005]

In order to solve the above-mentioned problems, a head-mounted display device of the present invention comprises an image display element and magnifying optical means for magnifying a virtual image of an image formed by the image display element. Having a virtual image forming optical system in the main body of the device,
A head-mounted display device in which the device body is mounted on the head and the user visually recognizes a magnified image with one of the left and right eyes, or with both eyes, and has a CPU such as a personal computer as a first component. An image data input unit consisting of an intelligent device or a video reproducing device such as a video, and as a second component, an image data processing unit for sending the input image information to the device body as a small signal, a backlight pulse control circuit. And a connection unit for transmitting image data from the control unit to the apparatus main body as a third component. An image display element and a VID for displaying image information on the image display element in the apparatus main body as constituent elements
It is characterized in that it is configured by a display unit including an EO circuit.

According to the above construction, the inside of the apparatus main body can be constituted only by the virtual image forming optical system and the VIDEO circuit, and the apparatus main body can be made compact and lightweight. Therefore, the neck, shoulder or head depending on the weight of the apparatus main body when the apparatus is mounted. Fatigue of the part can be reduced, and the user can work without worrying about the weight, so workability is also excellent. Furthermore, the circuit configuration and the way of dividing it are such that the circuit with a small signal processing level is integrated in the interface part and the circuit with a large signal level is integrated in the VIDEO circuit, so that the power loss is small and all the components of the system can be downsized. Excellent in portability and portability. In addition, it is possible to provide a display according to the purpose of use, which has a wide range of use such as a personal computer and a video as an information source.

Further, the flat panel display (FPD) attached to the personal computer is removed, and the control unit has a connector that can be connected to a connector for FPD connection. The digital signal and the power supply voltage which are image information are taken in from the connector. It is characterized in that it can be connected to the apparatus main body by the connecting means.

According to the above configuration, the FPD attached to the personal computer
The weight can be reduced by the amount removed, resulting in a system with excellent portability. Since the image information can be synchronized with the basic clock of the PC, there is no need to apply external synchronization,
You can also save power.

Alternatively, by taking in an analog signal and a synchronizing signal from the external CRT connection connector of the personal computer, the user can use the device main body connected by the connecting means and the FPD at the same time. Characterize.

According to the above configuration, the external CRT of the personal computer
It is excellent in versatility because it can take in data from the connector for
Moreover, since the FPD and the apparatus main body can be used at the same time, the convenience is high, and simultaneous monitoring by a plurality of people is possible.

Alternatively, when the image information is an analog signal, it is once converted into a digital signal, and when the image information is a digital signal, the number of bits is corrected, and then all the data processing up to clamping, γ correction and polarity inversion is performed by the digital signal, It is characterized in that it is configured by an image data processing unit for converting into an analog signal by a D / A converter and outputting from a buffer amplifier, a circuit for buffering a synchronization signal, and a basic clock generation circuit.

According to the above configuration, regardless of whether the input signal is a digital signal or an analog signal, and regardless of the number of input bits of the digital signal, it can be applied to any input signal, so that it is excellent in versatility. In addition, since polarity reversal can be processed at a small signal level, power can be suppressed, and since other clamp / gamma correction is also digitally processed,
Control can be performed in bit units.

The power supply voltage supply circuit is an F
Means for determining an input source by a sensor provided in each connection connector of the image information input source, which includes an internal power supply circuit capable of supplying a power supply voltage from the PD connector and an external power supply circuit such as an AC adapter and a battery or a battery. And a means by which the user can forcibly switch to the external power supply, and a means for switching to either one of the internal power supply circuit and the external power supply circuit.

According to the above configuration, if the internal power supply circuit is selected according to the form of the input source, it is not necessary to carry an external power supply, and the portability is further excellent when used as a portable display. Furthermore, if an AC adapter is selected and used from the external power supply circuit, it is not necessary to use the battery of the personal computer or the battery of the external power supply circuit, and by using both the external power supply and the internal power supply, the system It also enables long-term operation.

Further, a voltage conversion circuit for converting the selected supply voltage into a voltage required by the control unit, the display unit, and the image information input source, and the image data input from the selected image information source is processed. It is characterized in that it has a selecting means capable of supplying the converted voltage only to a circuit required for the operation.

According to the above construction, since the voltage conversion circuit is provided, only a simple reference power supply voltage needs to be supplied from the outside, and the construction is simple and the size can be reduced. Nevertheless, it has excellent portability and portability. Also, since only the selected circuit supplies the power supply voltage, it is possible to avoid wasting power.

In the backlight pulse control circuit, a means for producing a control pulse (BLDOUT) of the backlight for illuminating the image display element by using the horizontal synchronizing signal output from the image information input source is provided. Characterize.

According to the above configuration, BLDOUT can be easily produced from all types of input signals, so that it is excellent in versatility.

Further, the control unit is provided with a lightning cell for measuring the peripheral brightness, and a processing circuit capable of displaying the measurement result on the virtual image screen is provided so that the user can adjust the backlight brightness according to the peripheral brightness. You can The dimming method includes a method of modulating the pulse width of BLDOUT and a BLDO in which the period of 1 / n is thinned out from the BLDOUT.
It is characterized by having a dimming means which is used together with a method of pulse width modulation using UT.

With the above arrangement, the user can arbitrarily adjust the backlight brightness according to the ambient brightness while the device body is still mounted. In addition, by using the thinning process of BLDOUT together, a wide range of adjustment is possible.

Further, the BLD is maintained for a certain period of time after the power is turned on.
The pulse width of OUT is set to a pulse width required for stable discharge of the backlight, and an initial reset function is provided so that the pulse width can be arbitrarily changed after a certain period of time.

According to the above structure, unstable discharge due to the low temperature of the backlight tube when the power is turned on can be prevented and the reliability is high.

Further, it is characterized in that it has a phase adjusting means capable of freely adjusting the phase of BLDOUT within the blanking period of the image data.

According to the above configuration, in the case of BLDOUT synchronized with the horizontal synchronizing signal, when the pulse width is widened, BLDOUT exceeds from the blanking period of the image information to the display period, and noise generated in that portion. Is displayed on the screen, resulting in an image with poor visibility. Therefore, it is possible to adjust the phase of BLDOUT to be sufficiently within the blanking period, prevent noise from being displayed on the virtual image screen, and provide a screen with good visibility.

Further, in the connecting means, the analog signal which is image information is a shield line, and the synchronizing signal / BLDOU is used.
T, power supply voltage, etc. are transmitted by a twisted pair cable, and a single braided shielded cable that integrates these cables from the control unit to the VID inside the main unit
It is characterized by transmitting to the EO circuit.

According to the above construction, even if the image information is transmitted over a long distance, the signal deterioration can be suppressed to the minimum, and the noise sneaking around from the digital signal or the power supply voltage can be prevented.
Moreover, since the outer diameter of the cable can be reduced by the single braided shield structure, the feeling of pulling by the connecting means when the apparatus body is mounted can be reduced.

Furthermore, the connection state is such that the control unit side is detachable by connector connection,
The VIDEO circuit side is characterized in that it has a fixed connection structure that is directly mounted at a position close to the holding joint portion arranged in the substantial center of the device body.

According to the above construction, one side can be removed, which is convenient for carrying. Also, since the main body of the device is fixed, there is no risk of accidental disconnection or poor contact during work, so it is highly reliable, and it is connected to a position close to the holding joint at the center of the main body of the device. Therefore, the main body of the apparatus does not tilt due to the weight of the connecting means and the like, and the balance is good.

Further, it is characterized in that the output connector position of the connecting means on the control unit side and the mounting position of the VIDEO circuit are in the same direction when the user faces the data input means such as a keyboard.

According to the above structure, it is possible to prevent the connecting means from interfering with the work or accidentally being caught by the connecting means crossing the keyboard or the like, and to shorten the connecting means. Can be designed.

Further, as processing of the image information transmitted from the control unit, it is composed of a circuit for generating a polarity inversion signal for driving a liquid crystal panel which is an image display element, an analog SW, a source follower and a constant current circuit. The analog S / H circuit according to the present invention is characterized by performing frequency conversion twice.

According to the above construction, the image information which is being driven at high speed can be displayed without signal deterioration and resolution reduction. Therefore, by providing a virtual image screen with good visibility, fatigue can be suppressed. . Also, since the frequency is converted in the final stage, the number of parts can be reduced and the power can be suppressed.

Further, the VIDEO circuit board is composed of a double-sided mounting flat board, and large parts are arranged on the upper surface and small parts are arranged on the lower surface, and in particular, a liquid crystal panel connector and a backlight connector are arranged on the lower surface. It is characterized by having.

According to the above structure, the heat dissipation effect in the circuit / board is sufficient and the reliability is high. Furthermore, by arranging the two connectors for the image display element on the lower surface, the virtual image forming optical system can be moved when switching the visible eyes in the monocular head-mounted display device, which is excellent in versatility and commonality.

Further, after the virtual image forming optical system is accurately placed in front of one of the left and right eyes of the user, the virtual image forming optical system is stored in advance in the memory in the control unit or the external software and can be displayed on the enlarged virtual image screen. According to the procedure, the display screen is adjusted in the order of diopter adjustment, screen position, positive / negative display of the screen, and backlight brightness.

According to the above construction, since the display screen can be adjusted easily and accurately with the apparatus main body mounted, it is possible to provide a screen with good workability and good visibility.

In the screen position adjustment, the horizontal and vertical directions of the image are compressed with respect to the default screen to create a screen slightly smaller than the initial screen.
It is characterized in that it has means for adjusting the screen position in 1-dot units by changing the start position in each vertical direction by the amount of reduced data.

According to the above arrangement, if the virtual image screen is arranged in 1-dot units at the place where the user is most confident in visual recognition,
Fatigue can be minimized because the eyes can be visually recognized without difficulty. Further, even if the screen position shifts during the work, the virtual image screen can be adjusted to the optimum position without moving the device body.

[0039]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIGS. 1 to 4 show the configuration and usage of the head-mounted display device according to the first embodiment of the present invention. FIG. 1 is an overall system configuration diagram, and FIG. A usage pattern, FIG. 3 is a longitudinal sectional view of the virtual image forming optical system, and FIG. 4 is a circuit configuration of the control unit.

The head-mounted display device of the present invention shown in FIG. 1 includes an image information input source 3 including an intelligent device 1 having a CPU such as a personal computer and a microcomputer, or an image reproducing device 2 such as a video / laser disk. Image information is supplied, and the entire power supply voltage is supplied from the power supply voltage supply circuit 4 having a power management function. The image information input from the image information input source 3 is used by the control unit 5 to generate a backlight pulse by the image data processing unit for transmitting a small signal to the apparatus body and the backlight pulse control circuit. Further, the image information is transmitted from the control unit 5 to the apparatus main body 50 by the connecting means 7, and the VIDEO circuit 8 performs the processing for displaying the image information on the image display element 9.

That is, regarding the image information input source 3 which is the first constituent element and the interface section 6 which is the second constituent element which performs preprocessing for transmitting necessary data to the apparatus main body 50, 51 Confidence is an external device that is not worn or carried, and is connected to the VID from the third means connecting means 7.
Through the EO circuit 8, the user 51 mounts and works the fourth component, which is a display unit 10 for displaying image information on the image display element 9.

2, the personal computer 1 is used as the image information input source 3, the flat panel display (FPD) attached to the personal computer is removed, and the FP
The control unit 5 has a connector connectable with the D connection connector 18 from which image information and power supply voltage are directly taken out. Then, it is pre-processed by the interface section 6 and transmitted from the connector 11 to the apparatus main body 50 through the connecting means 7.

The apparatus main body 50 has a virtual image forming optical system 52 in front of either one of the left and right eyes of the user 51. The virtual image forming optical system 52 is held by the apparatus main body 50 in an idling state, extends in the direction of the eye width of the user 51, and has a screw-shaped shaft 89.
The shaft 89 has knobs 53 at both ends. When one of the knobs 53 is rotated, the shaft 89 idles with respect to the apparatus main body 50, so that the virtual image forming optical system 52 is movable in the eye width direction of the user 51. Further, the device body 50 is connected to the mounting means 55 via the hinge portion 54, and by adjusting the hinge portion 54, it is possible to hold the device 51 in front of the user with a depression angle.

On the outside of the virtual image forming optical system 52 as viewed from the user 51, there is provided a partially transmissive light-shielding plate 58 having a size that partially covers the visual fields of both eyes of the user 51. This partially transmissive shading plate 58 is used in a monocular head-mounted display device.
It has a role of preventing the contrast of virtual image information from being lowered due to the information coming from the anti-visual eye.

Further, the interface section 6 has a lightning cell 17 positioned to measure the ambient brightness and a SW 19 for switching between positive and negative display of the virtual image screen. In FIG. 3, the virtual image forming optical system 52 is composed of an image display element 9 including a liquid crystal panel 85 and a backlight 86 for irradiating the liquid crystal panel 85 from behind, a reflection mirror 91, and a lens 56 which is a magnifying optical means. To be done. Further, in the image display element 9, when the diopter adjustment knob 57 is rotated in the arrow A direction in FIG. 2, the rotation axis of the gear 88 coincides with the fulcrum of the diopter adjustment knob 57, and the gear 88 is rotated.
The frame body 87 that rotates by rotating the gears, that is, the image display element 9 moves in the optical axis direction, and the diopter can be adjusted by changing the relative distance to the lens 56, that is, the size of the enlarged virtual image 90.

Further, the image display element 9 is the liquid crystal panel 8
5 FPC cable 94 and backlight cable 9
5, the liquid crystal panel connector 93 and the backlight connector 96, which are arranged on the lower surface of the VIDEO circuit board 92 of the apparatus body 50, are electrically connected.

Next, the circuit configuration of the control unit 5 will be described with reference to FIG.

A digital signal, which is image information, is conditioned by the input buffer 20 while maintaining a small signal level, and the image information is latched by the DOTCLK 201 21.
After that, the D / A converter 22 causes the DOTCL
Clamp 2 converted to analog signal synchronized with K201
3 and γ correction 24 processing is performed, and finally processed by the output buffer 25 so that a long distance can be transmitted, and then output. The reason for transmitting an analog signal in this manner is to reduce the number of cables and to reduce power consumption by transmitting a small signal.

Further, with respect to the synchronizing signals such as H.VSYNC and DOTCLK, only the processing of the synchronizing signal buffer 26 is performed, and regarding the HSYNC 202, it is transmitted to the backlight control circuit 27 and the backlight control pulse 203.
Make (BLDOUT).

In the present embodiment, since the main body of the apparatus can be constituted only by the virtual image forming optical system and the display unit, a small and lightweight apparatus can be realized, fatigue due to the weight of the main body of the apparatus can be reduced, and the weight of the user is reduced. Excellent workability because you can work without worrying about Further, depending on the circuit configuration and how to divide the circuits, a circuit with a small signal processing level can be integrated into an interface part and a circuit with a large signal level can be combined into a VIDEO circuit to realize a device with less power loss, and all the system components. Since it can be miniaturized, it has excellent portability and portability. In addition, a wide range of applications such as personal computers and video sources as information input sources makes it possible to provide a display according to the purpose of use.

Further, the system can be made lighter by removing the FPD attached to the personal computer, resulting in excellent portability.
Further, since the image information can be synchronized with DOTCLK inside the personal computer, it is not necessary to perform external synchronization, and the power can be suppressed accordingly. In addition, the analog signal output enables signal transmission at a small signal level, so the power is suppressed, the number of signal lines is small, and the traction feeling due to the connecting means when the device body is mounted can be reduced. The person can work without feeling discomfort or fatigue.

(Second Embodiment) FIGS. 5 to 6 show the structure and usage of the head-mounted display device according to the second embodiment of the present invention. FIG. 5 shows the usage and FIG. 6 shows a control unit. The circuit block diagram of is shown. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 5, the personal computer 1 is used as the image information input source 3 as in the first embodiment.
In the state where 4 is connected as it is, the image information is drawn out from the external CRT connection connector 12 of the personal computer by the relay cable 13 and input to the interface section 6 for processing. The interface section 6 has an AC cord 15 for an external power source.
Are connected to a power supply voltage supply circuit 4, and a power supply voltage for driving the present apparatus and a power supply voltage for driving the personal computer 1 are created there.
The latter are respectively supplied by code 16. In addition, the interface section 6 has a lightning cell 17 positioned to measure the ambient brightness and a SW 19 for switching the positive / negative display of the virtual image screen.

In FIG. 6, the image signals output from the external CRT connection connector 12 are only analog RGB signals and H.VSYNC sync signals. First, since the analog RGB signal is the same as the signal analog-converted by the D / A converter 22 in the first embodiment, after the buffer processing 20, the clamp 23, the γ correction 24,
The output buffer processing 25 may be performed. Further, the synchronization signal and the backlight pulse are processed in exactly the same way as in the first embodiment.

In this embodiment, since data can be taken in from the external CRT connector of the personal computer, the versatility is excellent, and the number of elements can be reduced by making the analog input image information into a simpler circuit configuration, and the small signal level can be reduced. Since it can be processed as it is, the power can be suppressed. Further, unlike the first mode, since it has an FPD attached to a personal computer, the user can select and use both at the same time,
Good convenience and versatility. In addition, it can be used and viewed by multiple people at the same time, and it has excellent commonality.

(Third Mode) FIG. 7 shows a circuit configuration of a control unit of the head-mounted display device according to the third mode of the present invention. Similar to the above-described embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 7, the image information is output from the basic clock generation circuit 49 after the buffer processing 20 through the route (a) when the digital nbit signal is input regardless of the image information input source 3. Sarata basic clock 2
25, the digital signal having the number n of input bits is corrected and unified to 8 bits by the bit correction means 28. 8
Latch 21 and clamp 2 without changing the digital signal of bit
3, Gamma correction 24, polarity inversion 29 processing, D / A
The converter 22 converts the analog signal to the analog signal synchronized with the basic clock 225, and the buffer processing 25 is finally performed and then output. In the case of analog signal, it goes through the route of (b) and is digital 8 bit by A / D converter 30.
After being converted into the signal, the signal is processed in the same path as in the case of the digital signal.

In this embodiment, the image information input source is not limited to a personal computer, and it is possible to uniformly handle all digital signals and analog signals, and therefore it is excellent in versatility.

Further, unlike the first and second modes, VIDE
By performing the polarity reversal processing performed in the O circuit in the control unit, the load of large signal level processing can be reduced and the power can be suppressed.
By performing the correction and the polarity reversal processing, it is excellent in that control can be performed in bit units.

(Fourth Mode) FIG. 8 shows a circuit configuration of a control unit of the head-mounted display device according to the fourth mode of the present invention. Similar to the above-described embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

When the video reproducing device 2 is used as the image information input source 3, the signal input to the control unit 5 is
It is a composite video signal. In order to display a television signal such as NTSC or PAL in the same manner as the personal computer 1 described above, it is necessary to perform double speed conversion from the interlace system to the non-interlace system. Therefore, first, the YC separation means 120 divides the composite video signal into a luminance signal (Y) and a color signal (C), and the decoder 121 performs synchronous separation processing with the analog RGB signal using the luminance / color signal. Gain adjustment 1 for analog signals
After processing at 22, the clamps 23, γ similar to the above-described embodiment are used.
The correction 24 is performed, the double speed conversion clock 226 output from the control means 124 is used, and the double speed conversion unit 123 including the A / D converter 30, the latch 21, and the D / A converter 22 digitally converts the speed into a buffer. 25 processing and output.

In addition, the composite SYNC which is synchronously separated
H · VSYNC is created from 204, processed by the sync signal buffer 26, and output. In addition, HSYNC202
From the backlight pulse control circuit 27 to BLDOUT2
03 is created.

According to this embodiment, information from a video deck, which is a video reproducing device, a laser disk, etc., can be displayed, and further, it is displayed at a scanning speed double that of normal NTSC, so that a high-quality screen is obtained. As a result, the user can work with a good screen, and there is an effect of reducing fatigue. Furthermore, the number of parts is small by digitally processing only the double speed converter,
Since the power can be suppressed, the circuit can be downsized.

(Fifth Mode) FIG. 9 shows the configuration of a power supply voltage supply circuit for a head-mounted display device according to a fifth mode of the present invention. Again, similar to the above-described embodiment, the same parts are shown. Are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 9, when the power source voltage supply circuit 5 connects the image information input source 3 to the dedicated connectors 31 to 33, respectively, the sensor 3 arranged in the connector portion.
Any one of 4 to 36 senses the result and sends the result to the image information input source determination means 37 to identify the input source. Normally,
The power supply voltage circuit corresponding to each input source is selected, but when it is not necessary to use the external power supply 43 depending on the use environment, it can be forcibly switched from the outside. In that case, the external power source 43 is composed of the AC adapter 41 and the battery or the battery 42, and the forced switching signal 20
When 5 is input, the external power supply circuit 43 is selected, and when the forced switching signal 206 is input, priority is given to the battery & battery 42 among the external power supply circuits.

Therefore, the compulsory switching signal 205 or 206
Is inputted by the external power supply circuit selecting means 38 and compared with the result of the input source judgment. Assuming that the forced switching signals 205 and 206 are not input,
When the FPD connection connector 31 of the personal computer is the image information input source 3, the power supply circuit selecting means 39 selects the circuit 40 for supplying the power supply voltage from within the personal computer, and the external CRT connector 32 of the personal computer and the video signal connector 33.
If input from, the battery & battery 42 is selected. As described above, the supply voltage 207 selected by the power supply circuit selecting means 39 is the power supply voltage of the circuit necessary for displaying image information on the image display element 9 in the image display circuit 45 of the voltage conversion circuit 46. It is converted into 208 and is supplied to the control unit 5 from the supply circuit selection means 47 which supplies only to the drive circuit for the selected image information input source. Further, the voltage 209 required for the image information input source 3 is similarly created and supplied by the information input source circuit 44 of the voltage conversion circuit 46.

According to the present embodiment, the power supply voltage can be driven without an external power supply, and when used as a portable display, it is light and compact because there is no external power supply. Excellent in portability. If you do not have a problem in power supply such as indoors, you do not need to use the battery or battery or the power supply voltage in the PC, so you can secure the system operation time for a long time. Further, since it has a voltage conversion circuit, only the reference power supply voltage needs to be supplied, and the structure of the interface section can be simplified and downsized,
It is even more portable. In addition, since only the selected circuit supplies the power supply voltage, it is possible to avoid wasting power.

(Sixth Mode) FIGS. 10 to 12 show a backlight control circuit of a head-mounted display device according to the sixth mode of the present invention, FIG. 10 showing its circuit configuration, FIG. 11 showing a timing chart, and FIG. FIG. 12 shows a screen display of the peripheral luminance measurement result. Again, like the above-described embodiment, the same parts are designated by the same reference numerals, and the description thereof will be omitted.

As described in the first to fourth embodiments, the backlight control pulse BLDOUT 203 is created from the horizontal sync signal HSYNC.

This HSYNC is an HSYNC whose image information input source is output from an intelligent device such as a personal computer.
The driving speeds of the NC1 (202) and the HSYNC2 (216) output from a video playback device such as a video are different, and the HSYNC1 (202) is HSYNC2 (216).
The period is about 1/2 of that of. Therefore, HSYNC
In BLDOUT completely synchronized with 1 (202), the driving speed is fast, and the brightness of the backlight is too bright.
BLDOUT once every 1 / n cycle of SYNC1 (202)
Need to be converted by the circuit that outputs.

First, the horizontal synchronizing signal output from the image information input source 3 is input to the HSYNC selection means 70, and HS is input.
Either one of YNC1 (202) and HSYNC2 (216) is selected. HSYNC2 (2
When 16) is selected, it is output as it is through the pulse width modulation circuit 82. H of intelligent device 1
In the case of SYNC1 (202), it is input to the counter 71 which uses the HSYNC1 as a basic clock, and the counter 71
The Q1 output 210 of 1 is counted at each falling edge of HSYNC1, and the Q2 output 211 is counted once in the double period. These two counter outputs are used as the thinning switching S
One of them is selected by W (SW1) 72. Normally, the Q1 output 210 of the counter is set to be selected. When the backlight is too bright and does not reach the optimum luminance with respect to the ambient luminance due to the pulse width modulation using the Q1 output 210, the Q2 output 2 having a cycle twice that of the Q1 output 210 is used.
11 is selected, BLDOUT203 output is Q1 output 21
A wider adjustment range can be obtained by reducing the value to half that when 0 is used.

Next, the falling position of the Q1 output 210 is delayed by the I / S 73, which is the phase adjusting means, to such an extent that it is not displayed on the screen within the blanking period of the analog signal.
This is because the pulse width modulation is adopted as the backlight brightness control method, so that if the pulse width becomes long, the BLDOUT 203 will be over in the display period from within the blanking period, and the noise of that portion will be displayed on the screen. This is because it will be done. Therefore, the phase adjusting unit 73 adjusts so as to be asynchronous to HSYNC1, and the BLDOUT20 is adjusted within the blanking period.
Adjust so that 3 rises and falls.

The output 212 of the I / S 73 is supplied to the monostable multivibrator 1 (MB1) 74 and the monostable multivibrator 2 (MB2).
Enter 75. In MB1 (74), the output 21 with a constant pulse width, which is determined by the time constant of the resistor 76 and the capacitor 77
3 is output, and the pulse width variable output 214 determined by the resistor 78 and the capacitor 79 is output from MB2 (75). The two pulses 213 and 214 are generated by the signal control means S / S80 to generate a control signal 215 for switching the fixed output 213 to the fixed output 213 within a certain time after the power is turned on, and thereafter to output the variable output 214. Write output SW2
It is switched at (81) and BLDOUT 203 is output.
This is because the backlight tube is not warmed for a while after the power is turned on and the discharge is unstable, so pulse width modulation is not performed until the discharge stabilizes, and the pulse width with the best luminous efficiency is obtained. It is an initial reset circuit that is fixed to.

In FIG. 12, the peripheral luminance is measured by the electric cell 17 for measuring the peripheral luminance arranged in the control unit 5, and the measurement result 83 is displayed on the virtual image screen 90. Therefore, the user 51 can easily adjust the backlight brightness to the optimum backlight brightness according to the ambient brightness while wearing the apparatus body 50. According to the present embodiment, it is possible to easily generate a backlight pulse using the horizontal synchronization signal, and it is possible to realize a constant backlight brightness regardless of the image information input source. The brightness of the backlight can be adjusted while the device body is still attached, resulting in excellent workability. A wide adjustment range can be easily realized by using the pulse width modulation of the thinned BLDOUT together with the normal pulse width modulation. Furthermore, the reliability is excellent due to the initial reset circuit for preventing unstable discharge when the power is turned on. Further, the phase adjusting means for preventing the edge of BLDOUT from being displayed on the display screen even if the pulse width is widened improves the visibility of the virtual image screen and helps prevent fatigue.

(Seventh Mode) FIGS. 13 and 14 show a connecting means of a head-mounted display device according to a seventh mode of the present invention. FIG. 13 is a sectional view and FIG. 14 shows the connection state. .
Again, like the above-described embodiment, the same parts are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 13, connecting means 7 is means for transmitting image information, power supply voltage and the like from the control unit 5 to the apparatus main body 50. Analog R
Each image data of GB is transmitted by a signal line 60 shielded by itself, and other signals are twisted pair cable 6 in which two unshielded lines 61 are combined.
Sent by 2. The twisted pair cable 62
Is composed of two for the sync signal, one for the backlight signal, and seven for the power supply voltage, for a total of 5 to 10. The shield means 60 and the twisted pair cable 62 are unified into one, and the connection means 7 is constituted by a single cable consisting of a horizontally wound single braided shield 63 and an outer diameter sheath 64 around the shield wire 60.

Further, the signal line 6 which is a portion for transmitting a signal
By using the assembly line having the thickness of the AWG 28 for each of 5 and 66, a structure having sufficient strength can be realized although the outer diameter of the cable is small. With respect to the shield 63 as well, by adopting the horizontal winding single knitted shield structure, the outer diameter of the cable can be similarly thinned, and even if the outer diameter sheath is thinned, the shield shape does not protrude to the outside. By using a light and soft material for the outer diameter sheath 64, the flexibility of the connecting means itself is increased.

FIG. 14 shows the connection state of the connection means 7 with each circuit. The control unit 5 side is configured to be detachable by the connector 11, and the VIDEO circuit 8 side is the upper surface of the VIDEO circuit board 92, and the device body 5
It has a fixed connection structure that is directly mounted at a position close to the holding joint portion 54 at substantially the center of 0. Therefore, it is highly portable and has a high degree of safety, such as no fear of falling out even if it is suddenly pulled during work, and no risk of contact failure due to frequent insertion and removal. In addition, the holding joint 54
Since it is fixed at a position close to, the device main body 50 does not tilt due to the weight of the connecting means 7 and the like, and the balance is good.

Further, referring to FIG. 2 or FIG. 5, when the user 51 faces the keyboard, mouse or the like which is the data input means when working, the connector 11 on the control unit 5 side and the connecting means 7 in the VIDEO circuit 8 are connected. It is important that the mounting positions of and are arranged in the same direction. This is because if the connecting means 7 crosses a keyboard or the like, the user 51 cannot concentrate on the work, it is dangerous because the user 51 may get caught by the hand during the operation, and the cable length can be designed to be short. Is also excellent.

According to the present embodiment, even if the image data is transmitted over a long distance from the control unit to the main body of the apparatus, the signal deterioration is small. Especially, regarding the image signal, noise is mixed from the digital signal or the power supply voltage signal. Since it is possible to provide an image with high visibility, it is possible to reduce the burden on the user's eyes. Further, since the outer shape of the connecting means can be made thin and soft, the feeling of pulling by the connecting means at the time of mounting can be reduced, and a good device can be provided. In addition, as described above, it is also excellent in reliability, safety and workability.

(Eighth Mode) FIG. 15 shows a circuit configuration of a VIDEO circuit of a head mounted display device according to an eighth mode of the present invention. Again, like the above-described embodiment, the same parts are designated by the same reference numerals, and the description thereof will be omitted.

In the circuit configuration of the VIDEO circuit 8, the analog RGB signal which is image information is processed by the buffer 100 and then an alternating signal for preventing liquid crystal deterioration when displaying on the liquid crystal panel 85 is created by the polarity reversing circuit 103. To do. The polarity inverting circuit 103 produces a reference signal of an alternating signal by the circuit 101 for producing a positive signal and a negative signal respectively, and switches the positive / negative signal by the analog SW1 (102) by the polarity inversion control signal 220, and outputs a large signal. The frequency is converted into a level inversion signal. Here, the polarity determination control signal 220 is a horizontal synchronizing signal or a vertical synchronizing signal, and further a signal that changes in synchronization with the timing when the data for one pixel of the liquid crystal panel 85 changes.

Further, in the liquid crystal panel 85, the display characteristics are not sufficiently ensured and the transfer speed of the image information is fast. Therefore, when the image information is directly displayed, signal deterioration and resolution reduction occur, and the visibility deteriorates. . So analog S
It is necessary to perform frequency conversion by the / H circuit 107 and convert an analog signal into a driving speed that allows optimum display.
The signal output from the polarity inverting circuit 103 is an analog SW.
2 (104), the n S / H clocks 221 output from the panel drive circuit 111 are used to perform frequency conversion into S / H data 222 having a conventional 1 / n drive speed,
/ H data 222 is held by the source follower 105. At this time, the FE that constitutes the source follower
In order to suppress the variation in the drain-source current (I _DSS ) of T, the constant current circuit 106 draws a constant current. After output from the analog S / H circuit 107, the image information is output to the liquid crystal panel 85 as image information of a large signal level through the video buffer 103.

For H · VSYNC, the buffer 10
After the processing in 9, it is input to the PLL circuit 110 for adjusting the synchronization of the display screen. Here, when the DOTCLK is connected from the personal computer 1 as in the first embodiment, the latch 21 in the control unit 5 and the D / A converter 22 output signals that are completely synchronized. , The PLL circuit 110 can be omitted. After the PLL adjustment, as the clock for driving the X / Y-direction driver of the liquid crystal panel 85, a large signal level clock is created by the panel drive circuit 111 as with the analog signal and output to the panel.

Further, B which is a backlight control pulse
The LDOUT 203 is directly sent to a circuit incorporated in the backlight 86, and is converted into a signal capable of lighting the backlight.

Further, from FIG. 3 and FIG. 14, the apparatus main body 50
The VIDEO circuit board 92 therein is a double-sided mounting type flat board. Tall parts and large ICs are arranged on the upper surface, and small chip parts and the FPC cable 94 of the liquid crystal panel constituting the image display element 9 are arranged on the lower surface.
A connector 93 for connection and a connector 96 for connecting the backlight cable 95 are arranged.

By adopting such a structure of the flat type substrate, a circuit having a high heat dissipation effect of the circuit / substrate and being highly reliable. If the positions of the liquid crystal panel connecting connector 93 and the backlight connecting connector 96 arranged on the lower surface and the FPC cable 94 and the backlight connecting cable 95 of the liquid crystal panel are designed to have a sufficient length, the monocular type The movement of the virtual image forming optical system when switching the visible eye in the device of
It can be done smoothly and easily and has excellent versatility and commonality.

According to the present embodiment, the VIDEO circuit has only a large signal level processing circuit necessary for displaying image information on the liquid crystal panel, and therefore the power loss is small. By performing frequency conversion of image data twice, it is possible to provide a virtual image screen with excellent display performance and high visibility. Therefore, the burden on the visible eye is reduced, and fatigue can be reduced. Especially,
Since the analog S / H is performed in the final stage, the number of parts can be reduced, the circuit can be downsized, and the power can be suppressed. Further, as described above, since the liquid crystal panel and the backlight connection connector are provided on the lower surface of the VIDEO circuit board, the switching of the visible eyes in the monocular head-mounted display device can be performed by only one virtual image forming optical system. Excellent versatility and commonality.

(Ninth Mode) FIG. 16 is a flowchart showing a method of adjusting the display screen of the head mounted display device according to the ninth mode of the present invention. The description will be given with reference to the usage pattern described in FIG. 2 and the cross-sectional view of the virtual image forming optical system in FIG.

The user 51 can reduce the fatigue during VDT work by working while looking at the good virtual image screen 90, that is, the screen with good visibility. Therefore, in the present embodiment, it is better. An adjustment method for obtaining the virtual image screen 90 will be described. It is considered that the selection of the visible eye 59, the adjustment of the interpupillary distance, the adjustment of the depression angle, and the like when the apparatus main body 50 is attached have been completed.

The adjustment procedure is stored in advance in the memory in the control unit 5 or the external software.
The stored adjustment procedures are all displayed on the virtual image screen 90, and the diopter adjustment, the screen position, the positive / negative display selection, and the backlight brightness are adjusted in this order in accordance with the instruction.

First, the adjustment procedure is called from the memory or external software.

In the first diopter adjustment, a * mark of a size large enough to be visually recognized by the user 51 is displayed in the center of the virtual image screen 90,
The user 51 self-confidence moves the diopter adjustment knob 57 so that the * mark can be seen at the best position.

Next, it is confirmed whether the position of the virtual image screen 90 may be the same as it is. If it is desired to lower the screen slightly to the lower right, first, the horizontal screen is compressed dot by dot with a keyboard or a mouse that is a data input means. By performing the same operation on the screen in the vertical direction, a screen that is slightly smaller than the initial screen is obtained, and the compressed screen is moved in the lower right direction in dot units by the amount of the reduced data.

Next, it is confirmed whether the virtual image screen 90 is allowed to remain in the positive display. Here, the positive display in the initial setting is
There is no problem even with the negative display. When it is desired to change the display of the initial screen to the negative display, it is switched by the switching switch 19 arranged in the control unit 5.

Finally, the backlight brightness adjustment is performed. As described in the sixth aspect, after measuring the peripheral luminance by the peripheral luminance measuring lightning cell 17 arranged in the control unit 5, the measurement result is confirmed on the virtual image screen.
The user 51 adjusts the optimum backlight brightness according to the peripheral brightness while looking at the virtual image screen 90.

After the above work is completed, the called adjustment procedure is completed, and all adjustments on the display screen are completed.

According to the present embodiment, each adjustment procedure is displayed on the enlarged screen, and the adjustment can be performed easily and accurately along with the adjustment procedure, so that the workability and operability are excellent. In particular, by adjusting the screen position, it can be visually recognized in a state that is not unreasonable for the visual eye, and even if the mounting deviation occurs during work, it can be adjusted to an optimum position without moving the device body.

[0100]

As described above, in the head-mounted display device of the present invention, since the device body can be constituted only by the virtual image forming optical system and the display unit, the device body becomes small and lightweight, and when mounted. Fatigue due to the weight of can be reduced. Further, in the circuit configuration and the way of dividing, according to the signal processing level, the small signal level processing is integrated in the interface part, and the large signal processing is integrated in the VIDEO circuit, so that a compact and low power loss circuit can be realized, and portability and Excellent in portability. In addition, it has a wide range of applications such as a personal computer and video, and can be used as various displays according to the purpose of use, so it is excellent in versatility.

Regardless of whether the image signal is a digital signal or an analog signal, a simple circuit configuration is sufficient, the number of elements can be reduced, and processing can be performed with a small signal level, so that power can be suppressed. Furthermore, by analog output,
It has a small number of signals and can be transmitted at a small signal level. Also, if image data processing such as clamping, gamma correction, polarity inversion, etc. is performed with digital signals, control can be performed in dot units. In particular, by processing the polarity reversal processing at the small signal level, the ratio of the large signal level processing is reduced and the power can be suppressed.

In addition, since both the FPD of the personal computer and this device can be used by the user at the same time and arbitrarily selected, the convenience and versatility are good, and the simultaneous use by a plurality of people is also possible. When the FPD is removed, the FPD is lighter and is more portable.

Further, since the power supply voltage supply circuit can be driven without an external power supply, it is light and compact, has excellent portability, and is more convenient as a portable display. A for use in places where power supply is not a problem
By forcibly switching to the C adapter, it is not necessary to use a battery or the like, so that the system can be operated for a long time. In addition, since only the selected circuit supplies the power supply voltage, useless power is not consumed.

Further, the backlight control pulse B
LDOUT can be easily made from the horizontal sync signal. For the brightness adjustment of the backlight as well, by using the pulse width modulation of BLDOUT and the pulse width modulation of BLDOUT thinned to the 1 / n cycle of BLDOUT together, a wide adjustment range can be easily realized, so that the virtual image screen Visibility is improved. In addition, it is an initial reset circuit that prevents unstable discharge when the power is turned on, and is highly reliable. Further, since the phase adjustment means is provided, BLDOUT does not exceed the blanking period as a result of pulse width modulation, and it is possible to prevent noise from being displayed on the display screen.

In the connecting means, signal deterioration is small even when transmitting a long distance. In particular, since noise is prevented from being mixed in the image signal from a digital signal or a power supply voltage signal, an image with high visibility can be provided and the burden on the user's visible eyes can be reduced. Furthermore, since the control unit side is removable, it is convenient to carry. Also, VIDEO
Since the fixed position on the circuit side is a position close to the holding joint, tilting of the main body of the device can be prevented and good balance is achieved. Moreover, even if it is suddenly pulled during work, there is no concern that it will come off, and there will be no risk of poor contact, providing a high degree of safety. Further, by making the connecting means thin and soft, it is possible to reduce the feeling of pulling when the device body is mounted.

In the VIDEO circuit, the frequency conversion of the image data is performed twice, so that the display performance is excellent and the visibility is improved. Therefore, the burden on the visible eye is reduced, and fatigue can be reduced. In particular, since the analog S / H is performed in the final stage, the number of parts can be reduced, the circuit can be downsized, and the power can be suppressed. In addition, due to the flat substrate structure, the heat dissipation effect of the circuit / substrate is high and the reliability is high.
The liquid crystal panel and the connector for backlight connection arranged on the bottom surface make it possible to smoothly and easily move the virtual image forming optical system when switching the visible eye in a monocular device, and it is also versatile and versatile. Excel.

Further, in the display screen adjustment of the head-mounted display device of the present invention, by displaying each adjustment procedure on the enlarged screen, the adjustment can be easily and accurately performed with the device main body attached. Therefore, it is possible to obtain a good virtual image screen with excellent workability and excellent visibility for the user.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a usage pattern diagram showing a first mode of the present invention.

FIG. 3 is a cross-sectional view centering on a virtual image forming optical system showing a first embodiment of the present invention.

FIG. 4 is a circuit configuration diagram of a control unit according to the first embodiment of the present invention.

FIG. 5 is a usage pattern diagram showing a second mode of the present invention.

FIG. 6 is a circuit configuration diagram of a control unit according to a second embodiment of the present invention.

FIG. 7 is a circuit configuration diagram of a control unit showing a third embodiment of the present invention.

FIG. 8 is a circuit configuration diagram of a control unit showing a fourth mode of the present invention.

FIG. 9 is a circuit configuration diagram of a power supply voltage supply circuit showing a fifth embodiment of the present invention.

FIG. 10 is a circuit configuration diagram of a backlight pulse control circuit showing a sixth mode of the present invention.

FIG. 11 is a timing chart of a backlight pulse control circuit according to a sixth aspect of the present invention.

FIG. 12 is a diagram for explaining a display method of a peripheral luminance measurement result in the sixth embodiment of the present invention.

FIG. 13 is a cross-sectional view of a connecting means representing a seventh mode of the present invention.

FIG. 14 is a view for explaining the connection state of the connection means according to the seventh aspect of the present invention.

FIG. 15 is a circuit configuration diagram of a VIDEO circuit showing an eighth embodiment of the present invention.

FIG. 16 is a flowchart illustrating a method for adjusting a virtual image screen, which represents a ninth mode of the present invention.

[Explanation of symbols]

 1 Intelligent Device 2 Video Playback Device 3 Image Information Input Source 4 Power Supply Voltage Supply Source 5 Control Unit 6 Interface Section 7 Connecting Means 8 VIDEO Circuit 9 Image Display Element 10 Display Unit 11 Connecting Means Connector 12 External CRT Connector 13 Relay Cable 14 Flat Panel Display (FPD) 15 AC code 16 Personal computer power cable 17 Lightning cell 18 FPD connection connector 19 Positive / negative display switching SW 20 Input buffer 21 Latch 22 D / A converter 23 Clamp 24 γ correction 25 Output buffer 26 Sync signal buffer 27 Backlight pulse control circuit 28 Bit correction circuit 29 Polarity inversion circuit 30 A / D converter 31 Personal computer FPD connector 32 Personal computer external CRT connector 33 VI Deo / LD pin jack connector 34 Sensor 1 35 Sensor 2 36 Sensor 3 37 Image information input source judgment means 38 External power supply selection means 39 Power supply circuit selection means 40 Power supply voltage inside personal computer 41 AC adapter 42 Battery & battery 43 External power supply 44 Information input source voltage conversion circuit 45 Image display circuit voltage conversion circuit 46 Voltage conversion circuit 47 Supply circuit selection means 49 Basic clock generation circuit 50 Device body 51 User 52 Virtual image forming optical system 53 Knob 54 Hinge 55 Mounting means 56 Lens 57 Diopter adjustment knob 58 Partial transmission type light-shielding plate 59 Virtual image visual eye 60 Shield wire 61 One twisted pair cable 62 Twisted pair cable 63 Shield part 64 Outer diameter sheath 65 Shielded signal line 66 Twisted pair cable signal line 70 HS NC selection means 71 Counter 72 Thinning switching SW 73 Phase adjustment means 74 Monostable multivibrator 1 75 Monostable multivibrator 2 76 Resistance 77 Capacitor 78 Variable resistance 79 Capacitor 80 Signal control means 81 Backlight output SW 82 Pulse width modulation circuit 83 Peripheral Luminance measurement result 85 Liquid crystal panel 86 Backlight 87 Frame 88 Gear 89 Axis 90 Virtual image screen 91 Mirror 92 VIDEO circuit board 93 Liquid crystal panel connection connector 94 FPC cable 95 Backlight connection cable 96 Backlight connection connector 100 Input buffer 101 Positive / negative electrode Signal generation circuit 102 analog SW1 103 polarity reversal circuit 104 analog SW2 105 source follower 106 constant current circuit 107 analog S / H circuit 108 video buffer File 109 Input buffer 110 PLL circuit 111 Panel drive circuit 120 YC separation 121 Decoder 122 Gain adjustment 123 Double speed conversion circuit 124 Control circuit 201 DOTCLK 202 Intelligent device HSYNC1 203 BLDOUT 204 Composite SYNC 205 Forced switching signal 1 206 Forced switching signal 2 207 Basic Supply voltage 208 Power supply voltage for image display 209 Power supply voltage for image information source 210 Counter Q1 output 211 Counter Q2 output 212 Phase adjusting means output 213 Monostable multivibrator 1 output 214 Monostable multivibrator 2 output 215 Control signal 216 Video reproduction Device HSYNC2 220 Polarity inversion control signal 221 Sample and hold clock 222 Sample and hold data 225 This clock 226 double-speed conversion clock

Claims (17)

[Claims] 1. A virtual image forming optical system comprising a magnifying optical means for magnifying a virtual image of an image display element and an image formed by the image display element is provided in the main body of the apparatus, and the main body of the apparatus is mounted on the head to display the enlarged image. In the head-mounted display device that the user visually recognizes with either one of the left and right eyes, or both eyes,
The first component has an image information input source composed of an intelligent device having a CPU such as a personal computer or a microcomputer, or a video reproducing device such as a video or a laser disk, and the image component as the second component. An image data processing unit for transmitting information to the apparatus body by a small signal, a control unit including a backlight pulse control circuit, and an interface unit including a power supply voltage supply circuit, and as a third component, For displaying the image information on the image display element and the image display element, having a connection means for transmitting an image signal from the control unit to the apparatus body, in the apparatus body as a fourth component. A head characterized by comprising a display unit composed of a VIDEO circuit It mounted display device. 2. The control unit of the head-mounted display device according to claim 1, wherein the flat panel display (FPD) attached to the personal computer is removed, and connection with the FPD connection connector is possible in the control unit. Head-mounted type having a different connector, capable of receiving a digital signal and power supply voltage which are image information from the connector, and connectable to the apparatus main body by the connecting means. Display device. 3. The control unit of the head-mounted display device according to claim 1, wherein the external C of the personal computer is used.
Analog RG that is image information from the connector for RT connection
A head-mounted type having a means capable of taking in a B signal and a synchronizing signal, wherein the user can simultaneously use the apparatus main body connected by the connecting means and the FPD. Display device. 4. The control unit of the head-mounted display device according to claim 1, wherein when the image information is an analog signal, it is once converted into a digital signal by an A / D converter, and when it is a digital signal. After correcting the number of bits, all data processing from clamp, γ correction, and polarity inversion is performed by digital signals, and the D / A converter converts it to an analog signal and outputs it from the buffer amplifier. A method for driving a head-mounted display device, comprising: a circuit for buffer processing, a circuit for generating a basic clock, and a backlight pulse control circuit. 5. The head-mounted display device according to claim 1, wherein the power supply voltage supply means is an FPD of the personal computer.
The internal power supply circuit capable of supplying a power supply voltage from the connector for connection to the control unit and the external power supply circuit such as an AC adapter and a battery or a battery are provided by a sensor provided at each connection connector of the image information input source. And a means for judging the image information input source and a means for allowing the user to arbitrarily select and forcibly switching to an external power supply circuit, and supplying a supply voltage to the internal power supply circuit and the external power supply circuit. A head-mounted display device having a means capable of switching to any one of the above. 6. The power supply voltage supply circuit for a head-mounted display device according to claim 5, wherein the selected supply voltage is converted into a voltage required by each of the control unit, the display unit, and the image information input source. And a power supply voltage converted by the voltage conversion circuit,
A head-mounted display device, comprising selection means capable of supplying only to a circuit necessary for processing image data input from the selected image information input source. 7. A backlight pulse control circuit for a head-mounted display device according to claim 1, wherein a backlight control pulse (BLDOU) for illuminating the image display element is used.
A head-mounted display device comprising means for creating T) using the horizontal synchronizing signal output from the image information input source. 8. The backlight pulse control circuit for a head-mounted display device according to claim 7, wherein an electronic cell for measuring peripheral luminance is arranged in the control unit, and the peripheral luminance measurement result is displayed on the enlarged display screen. The display circuit is provided on the display, and the user can adjust the backlight brightness according to the ambient brightness. As the dimming method, there is a method of modulating the pulse width of the BLDOUT to perform dimming. ,
BL thinned out at a cycle of 1 / n with respect to BLDOUT
In combination with the method of pulse width modulation using DOUT,
A head-mounted display device comprising a light control means. 9. The backlight pulse control circuit for a head-mounted display device according to claim 7, wherein the backlight operates stably even when the power is turned on, so that a pulse of BLDOUT is kept for a certain period of time after the power is turned on. The width is set to a pulse width required for stable discharge of the backlight, and after a certain period of time, it has an initial reset function that can be arbitrarily changed according to the ambient brightness. Wearable display device. 10. The backlight pulse control circuit of the head-mounted display device according to claim 7, wherein the BLDO is used.
A head-mounted display device, comprising a phase adjusting unit capable of freely adjusting the phase of the UT within a blanking period of the image information. 11. The head-mounted display device connecting means according to claim 1, wherein the analog signal, which is the image information, is transmitted by a shield wire, and the synchronization signal, BLDOUT, power supply voltage, etc. are transmitted by a twisted pair cable. A head-mounted display device characterized in that a single braided shielded cable in which these cables are integrated is transmitted to a VIDEO circuit in the device body. 12. The connection state of the connecting means of the head-mounted display device according to claim 11, wherein the control unit side of the mounting means is detachable by connecting with a connector, A head-mounted display device, characterized in that the device main body side is a fixed connection mounted directly on a VIDEO circuit board at a position close to a holding joint portion arranged substantially in the center of the device main body. 13. The connection means for the head-mounted display device according to claim 11, wherein the position of the output connector on the control unit side and the position of connection with the VIDEO circuit in the main body of the device are data input means. A head-mounted display device, wherein the keyboard and the mouse are in the same direction when facing the user. 14. The VIDEO circuit of the head-mounted display device according to claim 1, wherein, as processing of the image data transmitted from the control unit, a polarity inversion signal for driving a liquid crystal panel which is the image display element. And a circuit for generating the polarity inversion signal and an analog S / H circuit composed of an analog SW, a source follower, and a constant current circuit for frequency conversion twice. Driving method. 15. The VIDEO circuit of the head-mounted display device according to claim 14, wherein the VIDEO circuit comprises:
It is composed of a flat board of double-sided mounting, a large part is arranged on the upper surface of the board, and a small part is arranged on the lower surface thereof. Especially, a connector for connecting the liquid crystal panel on the lower surface and a connector for backlight connection A head-mounted display device comprising: 16. The head mounted display device according to claim 1, wherein the device main body is mounted, and the virtual image forming optical system is accurately arranged in front of either one of the left and right eyes of the user, and then the use. The operator can adjust the diopter of the virtual image forming optical system and the screen position of the magnified virtual image according to an adjustment procedure that is stored in advance in the memory of the control unit or external software and can be displayed on the magnified virtual image screen. ,
A head-mounted display device characterized in that the display screen is adjusted in the order of positive / negative display selection of the screen and backlight brightness adjustment. 17. The screen position adjustment in the head-mounted display device according to claim 16, wherein the screen position adjustment is performed with respect to an initial setting screen.
By compressing the image in 1-dot units in each of the horizontal and vertical directions, a screen that is slightly smaller than the initial screen is created, and the horizontal and vertical start positions of the image display element are changed by the reduced data. The head-mounted display device is characterized in that it has means for arbitrarily adjusting the screen position in 1-dot units.