JPH0434425A - image projection system - Google Patents

Abstract

PURPOSE:To eliminate a deficiency in the quantity of light of the back light of a portable electronic equipment and to improve the visibility of a transmission type liquid crystal display unit by lighting the transmission type liquid crystal display unit by using an overhead projection as a light source. CONSTITUTION:A back light unit 30 is constituted attachably to and detachably from the liquid crystal display unit 20, and connected and held by a connector and an engaging means when mounted on a main body 10. The quantity of light emission of an OHP light source part 60 is adjustable with a light quantity adjusting knob 65 provided on a flank and an OHP lens part 70 is supported by a nearly L-shaped column 73 and a hollow column 74 into which the coupling member 73a of the column 72 is inserted in a free extraction state. Namely, the system is provided with the engaging means which is united in the mode where illumination light emitted by the overhead projector illuminates the trans mission type liquid crystal display unit. Consequently, the back light unit is securely engaged and contents displayed on the transmission type liquid crystal display unit can be enlarged and projected.

Description

[Detailed Description of the Invention] [Industrial Application Field J] This proposal is based on a portable word processor (hereinafter referred to as
The present invention relates to electronic devices equipped with display units such as word processors (hereinafter referred to as word processors) and personal computers (hereinafter referred to as personal computers), and particularly relates to technology for systematizing the electronic devices in the OA field.

[Prior Art] Conventionally, when a presenter explains a subject at a conference or the like, a whiteboard, blackboard, etc. has been used to make the content easier to understand for other attendees. Also,
In recent conferences, overhead projectors (hereinafter referred to as rOHPJ) are increasingly being used as an alternative to these. OHP images are easy to reduce and enlarge, and are also easy to change.
In meetings where important company matters are decided, it is almost always used in a relaxed manner. Due to the nature of such meetings, 0l-I
Materials submitted to P are usually created through a complicated process of cleanly copying them using a word processor and copying them onto transparent sheets using a copying machine. This procedure can be rewritten as follows.

■ Creating sentences, tables, and graphs using a word processor ■ Printing out ■ Copying onto a transparent sheet using a copier ■ 0) Used in IP As shown above, as far as creating explanatory materials for meetings used in OHP is concerned, OA is still in use. The situation is far from that. This is caused by the fact that word processors and OHPs, which are different OA devices, are not combined as a system at all.

Recently, portable word processors and personal computers have become popular as office automation equipment.6 Portable personal computers can provide visual explanations using their graphic functions, so they are often used for meetings in the same way as the above-mentioned OHP. There are more and more things happening. Unlike the case of using an OHP, this method does not require much time and effort to create explanatory materials, but it has the disadvantage that the displayed images are small.

Due to the nature of these portable word processors and computers,
They are designed to be easily portable, and most cases use rechargeable N1CD batteries as a power source when carried. These electronic devices are equipped with a display, but because they are portable, they often use a liquid crystal display. This liquid crystal display has the disadvantage that the reflective type is very difficult to read, so a transmissive type liquid crystal display is used.
As a light source for illuminating this, an EL (electroluminescence) plate or a backlight consisting of a combination of a cold cathode tube and a diffuser plate is often provided. This backlight is N1c above.
Although it is powered by a D battery, it can only be used for a very short time with a charge capacity of -1, and cannot withstand use in long-term meetings.

Furthermore, the illumination light provided by the backlight is based on the premise that it can be obtained from a poor power source when the device is carried around, so it is dark and has poor visibility under office lighting.

[Problem to be solved by the invention] When making a presentation using the conventional OHP mentioned above,
One problem is that the process of creating materials is complicated and time-consuming. In addition, when using conventional portable electronic devices, the display image is small and the usage time is short.
There is a problem with poor visibility.

The present invention has been made in view of the problems of the above-mentioned prior art, and aims to realize an image projection system that can be carried and has less redundancy during the preparation of explanatory materials for meetings up to the point of explanation. .

[Means to solve the problem]

The image projection system of the present invention includes a transmissive liquid crystal display, a portable electronic device equipped with a backlight removably provided on the back of the display for illuminating the transmissive liquid crystal display, and an overhead projector. In the image projection system, the portable electronic device and the overhead projector are provided with illumination light generated by the overhead projector when the backlight is removed. The overhead projector has a dimming means for adjusting the brightness of the illumination light and a removable lens part for enlarged projection. Be prepared.

[Function J] Each of the portable electronic device and the overhead projector is provided with a locking means that illuminates the transmissive liquid crystal display with the backlight removed with the illumination light generated by the overhead projector. Since these are provided, they are securely locked and the contents displayed on the transmissive liquid crystal display can be enlarged and projected. In addition, the overhead projector has a removable lens for enlarging projection and is equipped with a dimming means to adjust the brightness of the illumination light, so materials can be created using the overhead projector as a light source. This solves the problem of insufficient light quantity, which has been a problem in the past.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1fa) is a schematic side view showing an embodiment of a portable electronic device such as a word processor or a personal computer according to the present invention, and FIG. 1fb) is a backlight portion of the electronic device shown in FIG. 1al. FIG. 3 is a schematic side view showing a removed state.

In Figure 1 1al and lbl, 10 is the main body of the electronic device,
20 is a transmissive liquid crystal display provided in the main body 10; 30;
4 is a backlight unit that illuminates the liquid crystal display 20;
0 is a keyboard for input, and 50 is a flexible disk device provided in the main body 10 for storing the document 1 graphics etc. to be displayed on the liquid crystal display 20.

The backlight unit 30 in FIG. 1 1al.

As shown in FIG. 1(b), it is configured to be detachable from the liquid crystal display 20, and when attached to the main body 10, it is connected and held by a connector and engaging means (not shown).

2(a) to 2(C) are diagrams for explaining a state in which the electronic equipment shown in FIG. 1 in the first embodiment is installed in an OHP and systemized, respectively. 2
Figure (a) is a plan view, Figure 2 (b) is a side view, Figure 2 (c)
) is a diagram showing the state during creation and editing of documents and figures.

The OHP includes an OHP light source section and a tX section 70. The OHP light source light intensity can be adjusted by a light intensity adjustment knob 65 provided on the side, and the OHP lens section 70 has a support 73 with a top 0 shape and a connecting member 73a of the support 73 that can be moved in and out. Although not shown, the continuous member 73a is supported by a hollow support 74 that is freely inserted and inserted, and is provided with a rack, which is engaged with a binion provided on a focus adjustment knob provided on the support 74 side. ing. The projection screen 80 is irradiated with projection light generated by the OHP light source light source section. Since the support column 74 is rotatably supported by a rotary shaft 72 and removably supported by a known means, the OHP lens section 70 can be rotated about the front upper axis 72 in the direction of the arrow shown in FIG. 2(b). It is rotatable. Further, the focus can be adjusted by a focus adjustment knob 71 provided at the connecting portion between the OHP light source light source section and the HP lens section 70 and the above-mentioned supports 73 and 74.

As shown in FIGS. 2(aJ to 2(C1), each OHP can be used in combination with a portable electronic device, and the main body 10 has an OHP light source with an upper 0 end of the light source section. A recess is provided as a means for fitting and holding the recess.

Electronic devices such as portable word processors and personal computers in this example are:
When using the device away from the office, at home, or on the go, the backlight unit 30 can be used like a conventional electronic device.
However, when you return to the office and use it for work, or when you use it for a long time to create explanatory materials for important meetings, etc., use the As shown in each of (C), the above-mentioned liquid crystal display 20 is attached to the OHP light source light source section and used in combination with an OHP.

This is because the backlight 30 is too dark for checking the display contents of the liquid crystal display 20 and is too dark to use for long periods of time when creating materials, making it easy for the eyes to get tired, and the displayed image is too small for use in meetings. It's for a reason.

When creating materials, the OHP lens section 70 is tilted upward so that it does not get in the way of the material creator, as shown in FIG. 2(c). This makes it possible to create materials using the light emitted from the OHP light source as a back lamp. This OHP light source is designed as a 0HP light source, so it has a strong light intensity, and it has a light intensity adjustment knob 65 to adjust the light intensity, so you can choose the brightness that is the least tiring to your eyes, making it comfortable. Able to create materials. In this way, once the report materials to be used at the meeting are completed, bring them to the conference hall in this state and display the necessary pages on the LCD display 20.
The OHP lens unit 70 was placed in a position facing the liquid crystal screen, the focus was adjusted with the focus adjustment knob 71, and the light intensity was adjusted to an appropriate amount with the light intensity adjustment knob 65. Explanatory materials are projected onto the projection screen 80. After this, although not particularly shown, press the up key, screen down key, previous page key, back page key, etc. provided on the keyboard 40 to freely copy the necessary parts of the document created in advance. It is configured so that it can be used.

In the embodiment shown in FIGS. 2(a) and 2(b), the image displayed on the projection screen 80 is displayed on the liquid crystal display 20.
Since the image displayed above is reversed in the horizontal direction, the keyboard 40 of the portable electronic device of this embodiment is provided with an image projection mode key (not shown), and when this key is pressed, the built-in The inverted image is displayed on the liquid crystal display 20 by changing the reading order of the image information stored in the image memory to be different from the normal one. As a result, an enlarged image similar to that displayed on the liquid crystal display 20 when creating materials is projected onto the projection screen 80.

FIG. 3 is a block diagram schematically showing the circuit configuration in the states shown in FIGS. 1(a) and 2(b) and FIG. 2, respectively.

The power output from the N1cd type battery 90 is supplied to the main circuit 120 via a power supply changeover switch 100 and a DC power supply stabilization circuit 110. A DC power supply stabilizing circuit 110 is provided to stabilize the output of the battery 90. The main circuit 120 becomes operational due to the power supply, and transfers the contents stored in the mutually connected flexible disk device 50 and the image memory 135 to the keyboard 40.
The data is read out in accordance with the contents of the input instruction, and is displayed on the liquid crystal display 20 via the driver 130.

The backlight unit 30 is composed of a backlight 31 composed of a diffusion plate and an EL or cold cathode tube, and an inverter 32. When attached to the main body 10, the inverter 32 is connected to the DC power circuit 110 via a connector. This turns on the backlight.

0) (P light source section 60 includes OHP light source 63.
．． The AC/DC! The light source circuit 62 drives the HP light source 63 using the DC output input from the primary circuit of the source circuit 63, and controls the driving output of the light source circuit 62 according to the adjustment content of the light amount adjustment knob 65 [see FIG. 2(b)]. , a control circuit 64 that adjusts the amount of light from the OHP light source 63.

When the HP light source unit 60 is attached to the main body 10, it is attached to the back of the liquid crystal display 20, and at the same time, the power selector switch 12 is switched by a coupling mechanism (not shown), the battery 90 is disconnected, and the transmissive liquid crystal display At the same time that backlight light from the OHP light source 63 is supplied to A.
The DC output of the C/DC power supply circuit 61 is outputted to the DC power supply stabilizing circuit 110 in the main body 10 via the connector, and power for driving the main circuit 120 is supplied.

FIGS. 4(a) and 4(b) are schematic side views showing the configuration of the second embodiment of the present invention, with FIG. 4(a) showing a state of enlarged projection, and FIG. 4(b) indicates the state at the time of document creation.

Since the main body lO of the portable electronic device in this embodiment is configured similarly to that shown in FIGS. 1 to 3, the same numbers are given and explanations are omitted.
The HP has a concave portion 1 which is a uniting means in the OHP light source section 140.
41, and when combined with the main body 10, one end of the main body 10 is inserted into the recess 141 so that the main body 10 is integrated. In this embodiment as well, the OHP lens section 150 is rotatably and removably attached to the OHP light source section 140 as in the first embodiment.
As shown in Figure (a), since the enlarged and projected image is folded back by the OHP lens unit 150 and projected onto the projection screen 160, it is necessary to invert the image displayed on the liquid crystal display 20 in this embodiment. There isn't.

When creating materials, the HP lens section 150 may be removed as shown in FIG. 4(b). At this time, the main body 10 can be stably installed by attaching removable support legs 170 whose length corresponds to the position of the recess provided in the OHP light source section 140.

FIG. 5(a) to FIG. 5(C) are diagrams showing the configuration of main parts of a third embodiment of the present invention, respectively.

This embodiment is provided with a locking means for attaching a portable electronic device to an OHP. Since the configuration of each device is the same as that of the first embodiment shown in FIGS. 2(a) to 2(c), the same reference numerals will be given and the explanation will be omitted.

The structure of the locking means of this embodiment will be explained based on FIG. 5(a) and FIG. 5(b).

FIG. 5(a) is a perspective view of this embodiment, showing the positional relationship between the two claws 66 of the locking means and the release button 67. Each claw 66 and the release button 67 are provided on a flat plate-shaped claw base 184 so as to protrude in the same direction, as shown in FIG. The OHP light source unit 60 is housed inside the OHP light source unit 60 so that only a release button 67 provided at the bottom of the OHP light source unit 60 protrudes to the outside. The OHP light source section 60 is an AC/DC light source shown in FIG.
An OHP base 18 as shown in the cross-sectional view of FIG. 5(c) on which various circuits such as a power supply circuit 61 and an OHP light source 63 are mounted.
5 and an outer plate that covers the OHP base 185. The two torsion bars 180 have their free ends engaged with two torsion bar receivers 182 provided at symmetrical locations on the claw base 184, and the center portion of each torsion bar 180 is engaged with the OHP base 185. Each is supported by two integrally provided bearings 181. The back of the claw base 184 and the OHP base 185
A spring 183 is provided between the claw base 18 and
4 in the protruding direction of each claw 66 and release button 67.

With the above configuration, each claw 66 is always in a state of protruding from the OHP light source section 60, and only when the release button 67 is pressed, the contents of the OHP light source section are released in conjunction with this. Ru.

The portable electronic device combined with the OHP of this embodiment includes:
A recessed portion having a shape compatible with each claw 66 is provided at a position corresponding to each claw 66 and is locked therein. As a result, the liquid crystal display 20 and the OHP are engaged in vertical positions by the recesses provided in the main body 10 and the claws 66, and are securely locked.

[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.

By integrating the portable electronic device with an overhead projector and configuring the transmissive liquid crystal display so that it can be illuminated using the overhead projector as a light source, it is possible to solve the problem of insufficient light intensity of the backlight of the portable electronic device, and the above-mentioned problems can be solved. This has the effect of improving the visibility of the display. In addition, the created materials displayed on the display can be enlarged and projected as they are, which saves time and effort when creating materials. This has the advantage that a projection system can be configured.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) respectively show the first embodiment 1 of the present invention.
J Schematic valley view showing aspect, Figures 2(a) to 2(c)
1 and 2 (a) are diagrams showing a systemized state in which the electronic devices shown in FIGS. 1(a) and (b) in the first embodiment are combined with an OHP, respectively, and FIG. ) to FIG. 2(c) are block diagrams showing the outline of the circuit configuration in the states shown respectively, and FIGS. 4(a) and (b) are schematic side views showing the configuration of the second embodiment of the present invention, respectively. , FIG. 5 shows the second embodiment, (a) is a perspective view thereof, (b)
is a perspective view showing the main part of the locking means, (c) is a perspective view showing the main part of the locking means,
- It is a sectional view along the X-line. DESCRIPTION OF SYMBOLS 10... Main body, 20... Liquid crystal display, 3o... Backlight unit, 31-... Backlight, 32...
...Inverter, 40...Keyboard, 50...Flexible disk device, 60,140...OHP light source section, 61...A C/D C power supply circuit, 62...
Light source circuit, 63-OHP light source, 64...Control circuit, 65...Light amount adjustment knob, 66...Tail, 6
7...Release button, 70,150...○HP lens section, 71...Focus adjustment knob, 72...Rotation axis, 7
3.74... Support column, 73a... Connecting member, 80,1
60... Projection screen, 170... Support leg, 18
0... Torsion bar 181... Bearing, 182
...Torsion bar holder, 183...Spring, 184.
...Claw base, 185...OHP base. Patent applicant Canon Co., Ltd.

Claims (1)

[Scope of Claims] 1. A portable electronic device comprising a transmissive liquid crystal display and a backlight removably provided on the back of the transmissive liquid crystal display for illuminating the transmissive liquid crystal display, and an overhead projector. In the image projection system, the portable electronic device and the overhead projector include a configuration in which illumination light generated by the overhead projector illuminates the transmissive liquid crystal display when the backlight is removed. , and the overhead projector has a dimming means for adjusting the brightness of the illumination light and a removable lens section for enlarged projection. image projection system.