JPH10285497A - Portable equipment with liquid crystal display - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To widely and suitably use from a dark use environment to a very bright use environment, and to improve an image displayed on a liquid crystal display device irrespective of ambient brightness. Provided is a portable device with a liquid crystal display device that can be viewed. SOLUTION: The camera-integrated VTR 10 includes a liquid crystal display device 16 for displaying images. Liquid crystal display 16
Are connected to the main body 12 and support the liquid crystal display device; a reflective liquid crystal display device 20 and a transmissive liquid crystal display device 22 provided on the support plate member 15; And a common driving circuit 23 for driving the transmission type liquid crystal display device 22 to simultaneously display the same image. According to the camera-integrated VTR 10,
One of the reflective liquid crystal display device 20 and the transmissive liquid crystal display device 22 that is more easily visible can be appropriately selected according to the brightness of the use environment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera-integrated video tape recorder (hereinafter referred to as a camera-integrated VTR).
The present invention relates to a portable device with a liquid crystal display device such as a portable terminal device, and more particularly to a display structure of a liquid crystal display device for image display provided in the portable device.

[0002]

2. Description of the Related Art In a portable device with a liquid crystal display device that can be used outdoors (hereinafter, simply referred to as a portable device), such as a camera-integrated VTR or a portable terminal device, a transmissive liquid crystal display device is a liquid crystal display device. A type provided as a display device is widely used. The transmissive liquid crystal display device includes a liquid crystal cell in which a liquid crystal layer is sandwiched between a pair of substrates having electrodes, and two polarizing layers disposed on both sides of the liquid crystal cell. A planar light-emitting body (backlight) is provided outside the opposite polarizing layer.

A portable device provided with such a transmissive liquid crystal display device can visually recognize display contents illuminated by a backlight when the device is used indoors or outdoors, especially when it is not bright. However, there is a problem that it is extremely difficult to visually recognize a displayed image in a bright outdoors or the like exposed to direct sunlight. In order to solve this problem, for example, an anti-reflection coating is applied to the surface of the transmission type liquid crystal display device to reduce light reflected on the liquid crystal surface, or to lower the reflection of the black mask. In addition, by increasing the transmittance of the transmissive liquid crystal display device, it is possible to improve the state of illumination by the backlight and make the display unit brighter.

[0004]

However, even if all of the above-mentioned improvement measures are incorporated, it is hard to say that the above problem can be solved in a bright outdoor place exposed to direct sunlight. In particular, a method of making the backlight brighter is not practical because power consumption increases and it becomes a great disadvantage for a battery-powered portable device.

In view of the above, the use of a reflective liquid crystal display device in which the display contents can be visually recognized under bright external light has been conventionally studied. However, when a reflective liquid crystal display device is used,
Since a backlight is not required, power consumption can be suppressed. However, contrary to a transmissive liquid crystal display device, a displayed image cannot be visually recognized if the surroundings are dark. in this way,
Regardless of whether a transmissive liquid crystal display device or a reflective liquid crystal display device is used, it is difficult to make a displayed image visible even in a dark or very bright use environment.

In view of the circumstances described above, it is an object of the present invention to provide a liquid crystal display which can be used in a wide range of use environments from a dark use environment to a very bright use environment, and is not restricted by ambient brightness. An object of the present invention is to provide a portable device with a liquid crystal display device that allows an image displayed on the device to be viewed well.

[0007]

In order to achieve the above object, a portable device with a liquid crystal display device according to the present invention is a portable device provided with a liquid crystal display device for displaying an image, wherein the portable device has a liquid crystal display device. Are connected to the main body of the apparatus and support the liquid crystal display device, the reflection type liquid crystal display device and the transmission type liquid crystal display device respectively provided on the support plate body, the reflection type liquid crystal display device and the transmission type liquid crystal display And a common drive circuit for driving the device and simultaneously displaying the same image.

[0008] In the present invention, when the portable device with a liquid crystal display device is, for example, a camera-integrated VTR, the image means an image that is captured by the photographing lens and displayed on the liquid crystal display device. When the portable device with a liquid crystal display device is, for example, a portable terminal device, it means an image such as various data displayed on the liquid crystal display device.

According to the portable device with the liquid crystal display device of the present invention, the transmission type liquid crystal display device and the reflection type liquid crystal display device are driven by the common driving circuit, and the same image is simultaneously displayed on both the liquid crystal display devices. be able to. This makes it possible to visually recognize an image displayed on the transmissive liquid crystal display device when the use environment is dark, and to visually recognize an image displayed on the reflective liquid crystal display device when the use environment is bright. The portable device can be used favorably in a wide range from a dark use environment to a very bright use environment.

[0010] Preferably, the support plate is rotatably connected at one end to the device main body, attached to a rotation shaft extending outward from the device main body and having a free end at the other end. The supporting plate is rotatable around the axis, and rotates with the rotating shaft about the connecting end of the rotating shaft so that the edge of the support plate on the free shaft free end side approaches or separates from the device body. I do. In this case, by rotating the support plate about the rotation axis, the tilt angle of the liquid crystal display device can be adjusted to be easily visible. Also,
By rotating the support plate along with the rotation shaft about the connection end of the rotation shaft, the edge of the support plate at the free end of the rotation shaft can be brought closer to the device body to be in the housed state. it can.

Preferably, the reflection type liquid crystal display device is provided on one surface of the support plate, and the transmission type liquid crystal display device is provided on the other surface. In this case, by rotating the support plate around the rotation axis, the user can easily select a liquid crystal display device that is more easily visible to the user. Alternatively, in a preferred embodiment, both the reflective liquid crystal display device and the transmissive liquid crystal display device are provided on one surface of the support plate. according to this,
Of the two liquid crystal display devices that are located on one surface and simultaneously display the same image, the one that is more easily visible can be selected and viewed.

Preferably, the support plate comprises two plate members provided with hinge joints in a direction parallel to or perpendicular to the rotation axis and folded around the hinge joint, The reflection type liquid crystal display device is provided on one plate, and the transmission type liquid crystal display device is provided on the other plate. According to this, the operation of rotating the support plate around the rotation axis to adjust the inclination angle of the liquid crystal display device, and the state in which the support plate body is moved closer to the free end of the rotation axis at the free end side of the device main body. In addition to the operation described above, an operation of positioning both liquid crystal display devices on one surface and the other surface of the support plate, or an operation of positioning both liquid crystal display devices together on one surface can also be performed.

[0013]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment 1 This embodiment is an embodiment of a portable device with a liquid crystal display device according to the present invention, and FIG. 1 is a main configuration of an embodiment of a camera-integrated VTR as a portable device with a liquid crystal display device. FIG. 2 is a perspective view schematically showing the entire structure of the camera-integrated VTR. As shown in FIG. 2, the camera-integrated VTR 10 has a main body (equipment main body) 12, and a viewfinder 14 is provided at a rear end of the main body 12.
A liquid crystal display device 16 for displaying images is arranged on the side part 12a.

The liquid crystal display device 16 includes a support plate 15 connected to the main body 12 and supporting the liquid crystal display device, and a reflection type liquid crystal display device 20 and a transmission type liquid crystal display device 22 provided on the support plate body 15, respectively. It has. Support plate 15
Is connected to the side portion 12a via a hinge joint 18. Thereby, the support plate 15 is rotatably connected to the main body 12 at one end, and is attached to the rotary shaft 17 extending outward from the main body 12 and having a free end at the other end. 17 (see arrow A in FIG. 2). The support plate 15 further rotates with the rotation shaft 17 about the connection end of the rotation rotation shaft 17, and the rotation shaft free end side edge 15 a of the support plate 15 approaches the main body 12, Alternatively, they are configured to be separated (see arrow B in FIG. 2). The rotation of the support plate 15 around the rotation axis 17 is for adjusting the tilt angle of the liquid crystal display device 16 so that it can be easily viewed. Is the edge of the support plate body 15 on the free shaft side at the free end side.
2 to bring it into a stowed state.

A reflection type liquid crystal display device 20 is provided on one surface of the support plate 15, and a transmission type liquid crystal display device 22 is provided on the other surface of the support plate 15. The reflection type liquid crystal display device 20 makes the display image visible by reflecting a part of the incident light, and the transmission type liquid crystal display device 22 displays the display image by the light of the backlight 30 provided on the back surface thereof. Make it visible. Reflective liquid crystal display 2
The zero and transmission type liquid crystal display devices 22 are designed so that their electrical characteristics are substantially the same as each other. This can be realized by designing using the same source driver, gate driver, and the like incorporated in both the liquid crystal display devices 20 and 22, respectively.

As shown in FIG. 1, the liquid crystal display device 16 includes a reflection type liquid crystal display device 20 and a transmission type liquid crystal display device 2.
2 and a common drive circuit 23 for simultaneously driving and displaying the same video. The driving circuit 23 includes a video circuit 24,
A timing generator circuit 26 and an inverter 28 are provided. The video circuit 24 includes a photographing lens (not shown)
Is transmitted as a video signal to the reflection type liquid crystal display device 20 and the transmission type liquid crystal display device 22. The timing generator circuit 26 includes the video circuit 2
The timing of the video signal output from the device 4 is adjusted, and various pulses necessary for driving the liquid crystal display device are transmitted to the reflection type liquid crystal display device 20 and the transmission type liquid crystal display device 22.

The inverter 28 changes the DC voltage of the power supply to a high AC voltage, and causes the backlight 30 to emit light. The power supply to the inverter can be switched as required by turning on and off a manual switch (not shown), and the transmission type liquid crystal display device 22 is set to a usable state only when the user determines that it is necessary. Power savings.

In the camera-integrated VTR 10 having the above structure,
For example, when photographing while viewing the image with the transmission type liquid crystal display device 22, first, the transmission type liquid crystal display device 22 is used.
Is raised from the main body 12 by rotating in the direction of arrow B, and is appropriately rotated in the direction of arrow A to adjust the inclination angle. Further, when the manual switch is turned on to supply power to the inverter 28 and the backlight 30 emits light, the image projected by the photographing lens is transmitted to the transmission type liquid crystal display device 22.
Shoot while viewing with. In this case, the liquid crystal display device 16
The reflective liquid crystal display device 20 and the transmissive liquid crystal display device 22 provided on one and the other surfaces are driven simultaneously by the video circuit 24 and the timing generator circuit 26 to display the same video.

The user takes a picture while viewing the transmissive liquid crystal display device 22. If the surroundings become too bright and the image becomes difficult to see, the liquid crystal display device 16 is moved by about 180 degrees in the direction of arrow A. (4) Rotate, and the display image is visually recognized by the reflection type liquid crystal display device 20 this time. This allows the user to clearly view the image that was difficult to view on the transmissive liquid crystal display device 22 on the reflective liquid crystal display device 20.

It is to be noted that the power supply of the inverter 28 can be automatically switched on and off when the brightness of the ambient light exceeds a predetermined level. In this case, the transmission type liquid crystal display device 22 can be brought into a usable state only when necessary according to the brightness of the use environment, so that power can be saved.

Embodiment 2 In this embodiment, as shown in FIG.
Are the reflection type liquid crystal display device 20 and the transmission type liquid crystal display device 2
2 are provided side by side on one surface of the support plate 33. The liquid crystal display device 32 has a hinge joint 18 attached to the main body 12a similarly to the liquid crystal display device 16 described with reference to FIG.
And can rotate in the directions of arrows A and B in FIG.

According to the liquid crystal display device 32 having the above-described configuration, the support plate 33 is rotated around the rotation shaft 17,
The tilt angle of the liquid crystal display device 32 can be adjusted to be easily visible. Further, by rotating the support plate 33 together with the rotation shaft 17 about the connection end of the rotation shaft 17,
The end 33 a of the support plate 33 on the free shaft side can be brought closer to the main body 12 to be in the housed state. Furthermore, when the surrounding brightness changes frequently, the image is confirmed by comparing the reflective liquid crystal display device 20 and the transmissive liquid crystal display device 22 which are directed in the same direction, whichever is easier to see. be able to.

Embodiment 3 In this embodiment, as shown in FIG. 4, the liquid crystal display device 36 includes a support plate 37. The liquid crystal display device 36 is shown in FIG.
As in the liquid crystal display device 16 of FIG.
8 and can rotate in the directions of arrows A and B in FIG. The support plate 37 is provided with a hinge joint 34 in a direction orthogonal to the rotation shaft 17 and is composed of two plate bodies 37a and 37b that are folded around the hinge joint 34 (see arrow C in the figure). ing. The reflection type liquid crystal display device 20 is provided on the plate 37a, and the transmission type liquid crystal display 22 is provided on the plate 37b.

According to the liquid crystal display device 36 having the above-described structure, the support plate 37 is rotated around the rotation shaft 17,
The tilt angle of the liquid crystal display device 36 can be adjusted easily. Further, by rotating the support plate 37 together with the rotation shaft 17 about the connection end of the rotation shaft 17,
The edge 37c (37d in the state of FIG. 5) of the support plate 37 at the free end of the rotating shaft can be brought close to the main body 12 to be in the housed state. When the liquid crystal display device 36 is in the state shown in FIG. 4, it can be used in the same manner as the liquid crystal display device 32 shown in FIG. 3, and when the surrounding brightness changes frequently, the reflection type liquid crystal display device 20 facing the same direction can be used. By comparing the transmission type liquid crystal display device 22 with the transmission type liquid crystal display device 22, it is possible to select one that is more easily visible. Further, the plate 37a is rotated in the direction of arrow C from the state shown in FIG.
In the state shown in FIG. 5 in which the liquid crystal display device 36 is positioned on one surface and the other surface, respectively, the liquid crystal display device 36 is rotated in the direction of arrow A so as to correspond to a change in ambient brightness, similar to the liquid crystal display device 16 in FIG. Can be used.

It is also possible to connect the plates 37a and 37b of FIG. 4 side by side in the vertical direction of FIG. That is, the hinge joint 34 is provided in a direction parallel to the rotation shaft 17, and the plates 37 a, 37 b
Is configured to be folded. In this case, substantially the same effects as those of the liquid crystal display device 36 shown in FIG. 4 can be obtained.

In the first to third embodiments, the camera-integrated VTR 10 has been described as a portable device with a liquid crystal display device. However, the present invention is not limited to this, and a small portable terminal device may be used as a portable device with a liquid crystal display device. The liquid crystal display device according to the invention may be applied to the portable terminal device.

[0027]

As described above, according to the portable device with the liquid crystal display device of the present invention, it can be used widely widely from dark use environment to very bright use environment.
The image displayed on the liquid crystal display device can be viewed well without being restricted by the surrounding brightness.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main part configuration of a camera-integrated VTR according to a first embodiment of the present invention.

FIG. 2 is a perspective view schematically showing the entire structure of the camera-integrated VTR of FIG.

FIG. 3 is a perspective view schematically showing the entire structure of a camera-integrated VTR according to a second embodiment of the present invention.

FIG. 4 is a perspective view schematically showing the entire structure of a camera-integrated VTR according to a third embodiment of the present invention.

FIG. 5 is a perspective view showing the camera-integrated VTR of FIG. 4 with the liquid crystal display device folded.

[Description of Signs] 10 VTR with camera, 12 Main body, 15, 3
3, 37 ... Support plate, 15a, 33a, 37c, 37
d ... Rotating shaft free end side edge, 16, 32, 36 ... Liquid crystal display device, 17 ... Rotating shaft, 18, 34 ... Hinge joint, 20 ... Reflective liquid crystal display device, 22 ... Transmissive liquid crystal display device, 23 ... Drive circuit, 24 ... Video circuit, 26
... Timing generator circuit, 28 inverter, 30 backlight, 37a, 37b plate.

Claims (5)

[Claims] 1. A portable device provided with a liquid crystal display device for displaying an image, wherein the liquid crystal display device is connected to a device main body and provided on a support plate for supporting the liquid crystal display device and on the support plate, respectively. And a common drive circuit for driving the reflective liquid crystal display device and the transmissive liquid crystal display device to simultaneously display the same image. Portable equipment with a liquid crystal display device. The support plate is rotatably connected to the device main body at one end, and is attached to a rotation shaft extending outward from the device main body and having a free end at the other end. The supporting plate is rotatable about the connecting end of the rotating shaft together with the rotating shaft so that the edge of the supporting plate on the free shaft side approaches or separates from the device body. The portable device with a liquid crystal display device according to claim 1. 3. The liquid crystal display according to claim 2, wherein the reflection type liquid crystal display device is provided on one surface of the support plate, and the transmission type liquid crystal display device is provided on the other surface. Portable equipment with device. 4. The portable device with a liquid crystal display device according to claim 2, wherein both the reflection type liquid crystal display device and the transmission type liquid crystal display device are provided on one surface of the support plate. . 5. A reflection type liquid crystal display, wherein the support plate comprises two plate members provided with hinge joints in a direction parallel to or perpendicular to the rotation axis and folded around the hinge joint. The portable device with a liquid crystal display device according to claim 4, wherein the device is provided on one plate and the transmission type liquid crystal display device is provided on the other plate.