JP2645306B2 - Portable image display - Google Patents

Description

The present invention relates to a portable image display device.

In this specification, (1) an image refers to an image, a character, a symbol, or the like that can be perceived through vision, and (2) an image display device includes a television receiver, a television monitor, a word processor, a personal computer, and a CAD / CAD. This refers to things that display images, such as CAM. Further, (3) the image display means (method) includes an electric display device such as liquid crystal, plasma, and electroluminescence (EL).

Hereinafter, as a representative example of the image display device, a liquid crystal type portable color television (hereinafter, referred to as L), which is already widely known and sold.
CD-TV), but the present invention is not limited to this.

FIG. 1 is an external perspective view of a conventional LCD-TV, and FIG.
It is a block diagram of the same TV.

In the figure, 1 is a built-in antenna (ANT) for receiving television broadcast waves, and 2 is a tuner circuit (TU) of a channel for channel selection.
N), 3 are a video signal processing circuit (Vsig), 4 is a color liquid crystal display (LCD) 5, and a liquid crystal drive circuit (DRV) that reproduces and displays a received image on the LCD 5, and 6 is a translucent liquid crystal. Considering the case where the reflected light from the mirror etc. is insufficient because it is a display, a backlight (BLT) consisting of a fluorescent lamp provided on the back side of the LCD 5, a sound signal processing circuit (Asig) 7 and a speaker 8 SP) and 10 are rectangular parallelepiped casings (CASE). As shown in FIG. 1, a front face of the CASE 10 is provided with an LCD 5 and an upper face is provided with an ANT1, and TUN2, Vsig3, DRV4, BL
T6, Asig7, SP8 and power supply battery (not shown)
Is housed inside.

The operation of each part of the device and each block is known (a product has already been sold), and thus the description thereof will be omitted.

Since the conventional LCD-TV is configured in this way, CA
If the SE10 is made smaller and the portability is given priority, the LCD5 becomes smaller and it is difficult to see it and it is easy to get tired.
If the size is increased and priority is placed on visibility, CASE 10 will increase, and this time, on the contrary, there will be a problem of lack of portability.
In other words, visibility and portability conflict with each other, and one of them must be sacrificed.

In addition, large color liquid crystal displays have disadvantages such as poor yield, lack of productivity, and difficulty in practical use.

The present invention is to eliminate such disadvantages and to provide a portable image display device which is excellent in both portability and visibility.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

FIG. 3 shows a two-part LCD-T according to one embodiment of the present invention.
FIG. 4 is an external perspective view showing a non-use state (folded state) of the TV, and FIG. 5 is a block diagram of the TV.

In the figure, 11 is an antenna (ANT) for receiving a TV broadcast, 12 is a tuner circuit (TUN) of a channel for channel selection, 13 is a video signal processing circuit (Vsig), and 19 is one field (1) of a video signal from Vsig13. The image dividing / reducing circuit (DEV) 14a for dividing the screen portion into two in the left and right directions, receives an output from the DEV 19 for displaying the right half image of one field, and reproduces the right half image of one field. Color liquid crystal display (LCDE) 15a
A liquid crystal drive (DRV) that drives the LCD.

A DRV 14b receives an output from the DEV 19 for displaying the left half image of one field, and drives the LCDE 15b to reproduce the left half image of one field.

16a and 16b are backlights (BLT) for facilitating viewing of images reproduced by the LCDEs 15a and 15b, respectively.
Audio signal processing circuit (Asig) for processing V broadcast audio signals,
18 is a speaker (SP). Reference numeral 15 denotes a liquid crystal display (LCD) composed of LCDEs 15a and 15b. Both LCDEs 15a and 15b are arranged as shown in FIG. 3 and can abut one contact to reproduce one image called "news" . 19a
Is a switch (SW). When SW19a is turned on, the image dividing operation of DEV19 is stopped, and the video signal of Vsig13 is
Only sent to V14b, only LCDE15b and BLT16b are activated, while DRV
14a, LCDE15a and BLT16a stop. In this embodiment, D
Although the RV14a, LCDE15a and BLT16a are stopped, only one of them may be stopped. At this time, LCDE1
5b, the video signal sent from the Vsig 13 via the DRV 14b is sequentially reproduced for one field. That is, SW1
When 9a was OFF, only the left half image for one field was reproduced on LCDE15b.
In E15b, the entire image for one field is reproduced. In this case, the size of the image (image size) is reduced to about 1/2 by the area ratio, compared to when SW19a is OFF.

Techniques such as image division, reduction, enlargement, and rotation are based on digital semiconductor memory (1Mbit class RAM).
, And are already sold as video tape recorders with digital memory, televisions with digital memory, CAD / CAM, etc., so detailed description is omitted.

20 is the left case (LCS) 20b and the right case (RCS) 2
0a is a case body (CASE) that is a folding type.
It is used in a spread state as shown in FIG.

Reference numeral 20d denotes a joint between the LCS 20b and the RCS 20a (CNT, also referred to as a hinge portion), which is made of a soft resin in both cases (LCS, RC
S) 20a and 20b are joined and bent easily. In addition, a metal may be used for the hinge in addition to the resin.

By doing so, when not in use, it can be folded and compact as shown in Fig. 4 and it is excellent in portability, and when in use it can be enlarged as shown in Fig. 3 to make it large and easy to see. Because large LCDs are composed of two small LCDEs, the productivity of LCDEs is high and cost can be greatly reduced, and the screen can be easily enlarged without losing any portability. Can be planned.

Next, another embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is an external perspective view showing a use state (spread state) of a two-segment portable color liquid crystal television according to another embodiment of the present invention, and FIG. 7 is an unused state (or a folded state) of the television. FIG. 3 is an external perspective view showing a state of use).

The electric circuit and the external configuration of this embodiment are the same as those of the embodiment shown in FIGS. 3 to 5.

The difference between this embodiment and the above embodiment is that the LCDE 15a and 15b face each other in the folded state because the joint portion 20d is on the front side of the CASE 20 as shown in FIG. Therefore, the TV could not be watched in the descent state.
d is on the back side of CASE20.
Since E15a and 15b are on the outside of each other, the LCDEs 15a and 15b are also on the outside as shown in FIG.
You can watch TV in this state.

Therefore, when the SW 19a is turned ON, it is possible to watch TV even in such a folded state, which is preferable when there is no space or when standing and watching in a train.

In the example shown in FIG. 7, when the SW 19a is turned on, the size of the image displayed on the DEV 19 (image size) is reduced by half, and the display direction of the displayed image is rotated by 90 degrees. This is an example, but the present invention is not limited to this. For example, only the size of the image may be changed without rotating the display direction of the image.

In the above embodiment, as an example of changing the size of an image, an image (one screen) of one TV broadcast program is enlarged and displayed on two liquid crystal display units (LCDE) as shown in FIG. As shown in FIG. 7, an example in which reduced display is performed using one liquid crystal display (LCDE) is shown, but the present invention is not limited to this. For example, two TV broadcast program images (for two screens) are multi-displayed (for two screens) on one liquid crystal display unit.
The display may be enlarged on one liquid crystal display unit.

As described above, according to this embodiment, the size of the image displayed on the display unit and the display direction of the image can be changed as shown in FIGS.

Next, another embodiment of the present invention will be described with reference to FIGS.

FIG. 8 is an external perspective view showing a use state of a three-segment portable color LCD television according to another embodiment of the present invention,
FIG. 9 is a block diagram of the television.

21 is a built-in antenna (ANT) for TV reception, 22 is a tuner (TUN), 23 is Vsig, and 29 is a 3-division signal to divide one field signal from Vsig23 vertically into three on the image. The circuits (DEV), 24a, 24b, 24c are DRVs for driving the LCDEs 25a, 25b, 25c, respectively.
b, 25c is a backlight (BLT) to make it easier to see. Reference numeral 25 denotes a liquid crystal display (LCD) that forms and reproduces one image using three liquid crystal plates, LCDEs 25a, 25b, and 25c.

It should be noted that the aspect ratio of the LCD 25 of this embodiment is different from the aspect ratio of the LCD 15 of the above two embodiments because
This embodiment is for high-definition TV reception.
This is because the above two embodiments are for NTSC TV reception. Also, as shown in Fig. 8, the left and right cases (LCS, RCS) 30a, 30e are not aligned with the center case (CCS) 30b. Because, if necessary,
It can also be narrower.

The left and right cases 30a, 30c are so-called double doors, and when not in use, the left and right cases 30a, 30c are attached to the LCDE 25b of the CCS 30b.
Close so that LCDEs 25a and 25c of 30c abut. Also, 28a, 2
Reference numeral 8b denotes left and right stereo speakers arranged in the left and right cases 30a and 30c. And the speakers 28a and 28b
Separation circuit that separates Asig27 output into stereo signal (SE
P) Connected to 31.

In this embodiment, the sizes of the LCS 30a and the RCS 30c are made equal, and the size of the CCS 30b is made equal to the area sum of the LCS 30a and the RCS 30c. That is, the display area of LCDE25b is changed to LCDE25a,
It is almost equal to both display areas of 25c. Of course, it may be divided into three equal parts.

Also, using the digital video signal processing means of the divide-by-three circuit (DEV) 29, there is a part to be particularly viewed near the boundary between the LCDEs 25a and 25b and the LCDEs 25b and 25c. Left and right, and shrink and enlarge part of the image,
You may make it rotate and move.

Also, by combining a PLL type electronic tuner and a digital memory (for example, by using the technique of Japanese Patent Publication No. 50-32009), multiple images of TV broadcast programs can be displayed on one display screen in a multi-display manner (picture-in-picture). A plurality of screens may be displayed according to the method. In this case, using the above-described embodiment, for example, images of two TV broadcast programs (for two screens) may be multi-displayed (displayed for two screens) on one liquid crystal display unit (LCDE), or enlarged. Then, the images may be separately displayed on two liquid crystal display units (LCDE) for one screen. According to the above embodiment, image display can be performed in various forms such as enlargement / reduction and increase / decrease of an image displayed on a plurality of liquid crystal display units.

In the above three embodiments, an example is shown in which one CASE body is constituted by a plurality of case parts joined by a flexible joint, but the present invention is not limited to this, and any joint is bonded and fixed. Instead, for example, each case part is a detachable independent case part, and these parts may be attached to each other when necessary and integrated, and each case part may be slid and pulled out when necessary. However, it is also possible to reduce the size when it is not needed.

Further, the LCD-TV may be a notebook-size or a card-size, and a video signal input terminal may be provided so that the LCD-TV can be used not only for a TV but also for a TV monitor of a video camera.

In the above-described embodiment, an example in which at least one of the plurality of liquid crystal display units is folded inward or outward has been described. However, the present invention is not limited to this example. Further, in the above-described embodiment, a plurality of liquid crystal displays (LCDE) for displaying images are provided, and at least one of the plurality of liquid crystal displays (LCDE) is replaced with another liquid crystal display (LCDE). ) And the main body of the apparatus are foldable, so that they can be made smaller or larger as required, and a portable image display device with excellent portability can be realized.

Next, another embodiment of the present invention will be described with reference to FIGS.

FIG. 10 is a view showing the use of a separate type portable television according to another embodiment of the present invention, and FIG. 11 is a view showing a state where the color liquid crystal display sheet of the television is curled and stored when not in use. FIG. 12 is a state diagram showing a state where the sheet is folded in four.

The configuration of the electric circuit of this embodiment is the same as that shown in FIG. 2, except that the liquid crystal display (LCD) 40 is not a translucent type, but a reflective type. Instead of a flexible substrate, a flexible resinous substrate was used. Since a thin plate made of a shape memory alloy is provided on the back of the LCD 40, the LCD 40 can be curled or bent to reduce its size when not in use, as shown in FIGS. By heating the shape memory alloy with the energy of the battery to a temperature equal to or higher than the predetermined temperature, it spreads and has no wrinkles as shown in FIG. 10 and can be restored to the original state (plate shape), and the large screen can be displayed without any inconvenience. It can be formed and is convenient to carry. It can be stored in a small bag and easily carried.

In the figure, reference numeral 43 denotes a cord with a connector for detachably electrically connecting the LCD 40 to the TV main body 41 having the antenna 42.

In this embodiment, in order to make the screen of the liquid crystal display (LCD) 40 easy to bend, a plurality of small liquid crystal display units (LCDE) are arranged and stuck, for example, in a mosaic shape, avoiding the fold. The connection prevents the liquid crystal display (LCDE) from reaching the fold.

In the above embodiment, an example was shown in which each LCDE was provided with a backlight using a fluorescent lamp. However, as shown in FIG. 13, natural light and room light were efficiently collected and used as a backlight. It may be. That is, in this type of conventional device, the mirror was fixed to the rear case, so that efficient light collection was not possible. However, in this embodiment, the case 50
A front case 51 for mounting the LCDE 54, a mirror 52 having a flexible constriction 55, and a rear case 53 for lowering the center of gravity to stabilize and fix the device. The angle of the mirror 51 and the mirror 52 can be freely changed independently, the vertical angle can be adjusted, and the mirror 52 can be adjusted.
Has a constriction 55 so that it can be freely rotated in either the left or right direction. It can collect light regardless of the incident angle (direction) of the ambient light and the positional relationship with the device, and can efficiently operate the LCDE54.
Therefore, a bright and easy-to-see display device can be realized without using electric energy, and power can be saved. Further, as the mirror of the mirror section 52, a ground glass may be used to reduce unevenness of the intensity of the incident light, and a concave mirror may be used.

In the above embodiment, an example of a color liquid crystal display is shown. However, the present invention is not limited to this, and the present invention can be implemented with a display such as a plasma type or an EL type. The portable image display device is not limited to an ultra-small image display device, but may be any portable image display device.

As described above, according to the present invention, a portable image display device excellent in portability, visibility, and practicability can be realized by being folded or slid so that it can be made smaller or larger as required.

That is, according to the inventions of claims (1) and (2), unnecessary image display on the display unit can be substantially stopped to reduce power consumption.

Therefore, for example, it is possible to realize a portable image display device with high practicality that satisfies both conflicting demands of increasing power consumption due to an increase in screen size and extending the life of a battery.

Further, according to the inventions of claims (3) and (4), the size of the image displayed on the display unit can be changed according to the usage environment and the display content, and the convenience can be improved.

Therefore, for example, when used while standing on a train during rush hour, it is very convenient to expand the range of use by folding it down, and a portable image display device with high practicality can be realized.

According to the invention of claims (5) and (6), the display direction of the image displayed on the display unit is changed according to the use environment and the display content, so that a limited display surface can be effectively used and the visibility is improved. Can be improved.

Therefore, for example, although the aspect ratio of the display screen is different between the case of being folded and the case of being opened, the display direction of the image can be changed, so that the difference in the aspect ratio can be reduced and the image display that is easier to see can be realized.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a conventional LCD-TV, and FIG.
V. FIG. 3 is a block diagram showing an embodiment of the present invention.
FIG. 4 is an external perspective view showing the use state of the split type LCD-TV, FIG. 4 is an external perspective view showing the non-use state of the TV, and FIG.
It is a block diagram of TV. FIG. 6 shows a two-split LCD-T according to another embodiment of the present invention.
FIG. 7 is an external perspective view showing a usage state of the TV in a folded state, and FIG. 7 is an external perspective view showing a usage state of the TV in a folded state. FIG. 8 to FIG. 12 are views showing other actual examples of the present invention. FIG. 13 is an explanatory diagram for explaining a use state of an image display device applicable to the device of the present invention. 5, 15, 25: Liquid crystal display (LCD), 15a, 15b, 25a, 25b, 25c: Liquid crystal display (LCDE), 19: Image division / reduction circuit (DEV), 20d: Joint (CNT ).

Claims (6)

(57) [Claims] 1. A portable image display device comprising a plurality of display sections for displaying images, wherein at least one of the plurality of display sections is provided so as to be foldable, wherein the plurality of display sections are provided. A portable image display device capable of displaying an image on at least one display unit and substantially stopping image display on at least one other display unit. 2. A portable image display device having a plurality of display units for displaying images, wherein at least one of the plurality of display units is a sliding type display. A portable image display device capable of displaying an image on at least one display unit and substantially stopping image display on at least one other display unit. 3. A portable image display device comprising a plurality of display units for displaying images, wherein at least one of the plurality of display units is provided so as to be foldable. A portable image display device wherein the size of an image to be displayed can be changed. 4. A portable image display device having a plurality of display units for displaying images, wherein at least one of the plurality of display units is a sliding type display, wherein the display is displayed on the display unit. A portable image display device capable of changing the size of an image. 5. A portable image display device comprising a plurality of display units for displaying images, wherein at least one of the plurality of display units is provided so as to be foldable. A portable image display device wherein the display direction of an image to be displayed can be changed. 6. A portable image display device having a plurality of display units for displaying images, wherein at least one of the plurality of display units is a slide type, and is displayed on the display unit. A portable image display device wherein the display direction of an image can be changed.