JPS626298A - Small image display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a compact image display device.

[Conventional technology]

In recent years, small-sized image display devices such as liquid crystal televisions and portable games have been developed, and are required to have portability, good design, functionality, and the like. For example, the structure of a liquid crystal television using a transmissive-reflective display panel is shown in FIG. Figure 2 is a cross-sectional view of the main parts of a conventional transflective LCD TV, in which 201 is a mirror surface, 206 is a display panel, and 205 is a main body with built-in circuit boards and batteries equipped with electronic components. The arrows in the figure indicate the path through which light incident from the back surface of the display panel 203 passes through the display panel 203, is reflected by the mirror surface 201, and reaches the eyes. As shown in FIG. 2, the display panel 203 is used as a transmissive type, and the mirror surface
The method of viewing the virtual image projected in 1 was adopted in order to obtain a clear and high-contrast image.

[Problem that the invention seeks to solve]

However, the structure shown in FIG. 2 has the drawback that it is difficult to form an integral structure with the lighting device, and the screen cannot be seen in a dark environment without lighting. An object of the present invention is to improve the above-mentioned drawbacks and provide a compact image display device with good portability and functionality.

[Means for solving problems]

The configuration of the present invention is to have a lighting device on the opposite side to the surface of the small image display device main body on which the mirror surface is arranged, and to display images by rearranging the image display device and arranging the lighting device and the matrix panel in a stacked manner. It is characterized by having a signal electrode drive circuit that distributes image data to the signal electrodes of the matrix panel in both directions.

〔Example〕

FIG. 1 shows an embodiment using the liquid crystal panel of the present invention.
Figure (Bl is a sectional view of the main part when used as a transparent direct view type, Figure 1 (C1 is a block diagram showing the connection relationship between the circuit block and the liquid crystal panel. In Figure 1, 101 is the display on the liquid crystal panel. 102 is an illumination such as an EL or fluorescent lamp that illuminates the liquid crystal panel from the back, 103 is a liquid crystal panel that displays an image, and 104 is the liquid crystal panel 103 and the main body. 105 is a main body in which a circuit board with electronic components, a battery, etc. is built in, and a lighting 102 is arranged on the surface opposite to the surface on which the mirror surface 101 is arranged; 1) 1 is a liquid crystal display; A signal electrode drive circuit outputs a drive waveform to the signal electrodes of the panel 106; 1) 2 is a scan electrode drive circuit that outputs a drive waveform to the scan electrodes of the liquid crystal panel 103; 1) 3 is an intersection between the scan electrode group and the signal electrode group The liquid crystal panel 10 consists of parts that
In the display section 3, T1 and T2 are the first and second scan electrodes from the top of the display section 1)3, respectively, and the scan electrodes are arranged periodically to fill the display section 1)3, forming a group of scanning electrodes. , Sl, S2, and Sn are the first, second, and nth signal electrodes from the left of the display section 1)3, respectively, and the n signal electrodes 81 to Sn are arranged at equal intervals. 1) 4 is A/D converted and connected to the signal electrode drive circuit 1.
) Image data input to 1, 1) 5 sequentially distributes image data 1) 4 to the bidirectional shift register in the signal electrode drive circuit, and immediately before one scan electrode is selected, one scan in the shift register is input. A distribution clock for transferring line segment image data to memory, 1) 6 is a selection start signal that gives the timing at which the scan electrode drive circuit 1) 2 starts selecting a scan electrode, 1
) 7 is a selection timing clock that gives the scan electrode drive circuit 1) 2 the timing to select the scan electrode; 1) 8 is the intersection of the scan electrode T2 and the signal electrode S2, and the scan electrode T2 is selected and the drive voltage is applied. An example of a passive pixel that performs gradation display according to the gradation voltage given by the signal electrode S2 when output, 1) 9 controls the traveling direction of the image data 1) 4 of the bidirectional shift register in the signal electrode drive circuit 1) 1 This is an image data advancing direction control signal.

As shown in FIG. 1 (5), a small image display device used as a transmissive type is connected to a liquid crystal panel 103 centered around a rotating connection part 104.
Rotate and bring it into close contact with the lighting 10-2.

When using the transparent direct view type as shown in 1 in FIG. In contrast to the rotating transmissive-reflective type, the transmissive direct-view type shown in FIG. 1 (CB) requires horizontal reversal. Therefore, Figure 1 (
0 signal electrode drive circuit 1) The order according to the time sequence of the image data held immediately before the bidirectional shift register in 1 transfers one scanning line worth of data to the memory is the display unit 1)
Depending on whether the signal electrodes are lined up in the direction from 81 to Sn corresponding to the left to right of 6, or the signal electrodes are lined up in the direction from Sn to 81 of the signal electrode corresponding to the right to left of display part 1) 6, the screen Performs left-right flip.

FIG. 3 is a side view of a main part showing an example of a rotating connection part, and
1 is a matrix panel, 602 is a main body, 606 is a rotating part where the matrix panel 301 connects with a rotating connection part using a rotating shaft, 604 is a rotating part where the main body 302 is connected with a rotating connection part using a rotating shaft, and 605 is a rotating part where the main body 302 connects with a rotating connection part using a rotating shaft. It is a support part for a rotating connection part made of a rigid body. Using the example of the rotating connection part in Fig. 3, it is possible to use both the transmissive type and the transmissive direct view type shown in (5) and (Bl) in Fig. 1. For example, if the main body is shaped, the rotating part 603 can be omitted, and the panel 301 and the rotating connecting part can be integrated.

FIG. 4 is a circuit diagram showing an example in which the bidirectional shift register in the signal electrode drive circuit 1 of FIG. 1 (signal electrode drive circuit 1 of 0) has three stages. In FIG. 4, 401 is an image data advancing direction control signal that controls the moving direction of image data, and 402 is an A/D
Focus output of certain image data quantized by conversion,
406 is a clock that moves the data in the shift register; 405, 406, and 407 are the 1st, 2nd, and 3rd outputs from the left of the shift register; 408 is an inverter that outputs the inverted image data advancing direction control signal;
09.410.41) is a selection gate consisting of AND and OR, controlled by the image data control signal 401, and selecting image data to be passed; 412.413.414
is a data type 7-lip flop (hereinafter referred to as D-FF), where D is a data input, φ is a clock input, and Q is an output. In FIG. 4, when the image data progress direction control signal 401 is at a high level, the image data 402 at a certain timing is first read into the D-FF 412 through the selection gate 409 at the read edge of the clock, and then at the read edge of the next clock 406. It passes through the selection gate 410 and is read into the D-FF 413, and then the next clock 40
At the read edge of 3, pass through the selection gate 41) and D-FF.
Since the image data is read in the order of 414, the sequentially output image data moves in the order of D-FF 412, 416, and 414 from left to right. Output 40
Load 5,406°407. On the other hand, when the image data advancing direction control signal 401 is at a low level, the image data 402 at a certain timing is moved from the right to the left D-FF 414, 413, 41 according to the read edge of the clock 403.
Since the image data 402 moves in the order of 2, this circuit becomes a bidirectional shift register and can reverse the displayed image horizontally. I think it would be easy to make the three-stage bidirectional shift register shown in FIG. 4 even more stages.

Figure 5 shows the second signal electrode drive circuit that reverses the screen left and right.
FIG. 2 is a circuit diagram showing an example of the circuit. In FIG. 5, 501.
502, 503, 504, and 505 are frequency dividers, respectively, and together constitute a ζ binary counter, φ is the clock input, R is the reset input, Q is the output of the binary counter, and 506.507.508 .509
．． 510 are frequency dividers 501.502.506.
The output of 504.505 is the input exclusive OR, 51) is the exclusive OR of 506.507.50
Decoder to which the output of 8.509.510 is input, 512
．． 513, 514, 515, 516, and 517 constitute a first scanning line memory that reads image data of a certain bit output from the A/D converter according to the address signal output from the decoder 51), and φ is the address signal of the decoder 51). , D is the input terminal for image data, Q is the output, and 518.519.520.521.522.526 stores data for one scanning line in the first scanning line memories 512 to 517. Then, a second scanning memory reads the contents of the first scanning line memories 512 to 517 by a read signal, D is an input, φ is a read signal input, Q is an output, and
The outputs of the scanning memories 518 to 523 are each connected to one signal electrode drive circuit, and a signal electrode drive waveform for displaying gradation etc. is created by combining with image data of another pit, etc., and 524 is a binary signal. -Counters 501 to 505
525 is a reset signal that resets the binary counters 501 to 505 immediately before capturing image data for one scanning line, and 526 is a reset signal when the signal is at low level. An image data address direction control signal 527 for controlling the decoder 51) to input the normal outputs of the binary counters 501 to 505 and input the inverted outputs when the level is high.
is a bit output of A/D converted image data, 52
8 is a read clock for the second scanning line memory.

In FIG. 5, in such a circuit, when the image data address direction control signal 526 is at a low level, the decoder 5
1) is addressed to the row (assuming that the direction is in the order of the first scan line memories 512 to 517 from left to right, when the image data address direction control signal 526 is at a high level, the decoder 51) Since the outputs of the input binary counters 501 to 505 are inverted, the decoder 51)
The direction in which addresses are specified is from right to left in the order of scanning memories 517 to 512, and the left and right sides of the displayed image are reversed.

Note that the present invention can also be applied to an active matrix panel having a memory function in a liquid crystal panel, and also to a transparent image display panel. Furthermore, the present invention can be used in portable televisions, video monitors, computer terminals, and the like.

〔Effect of the invention〕

As is clear from the above explanation, by using the compact image display device of the present invention as a transmissive type in a bright environment such as outdoors during the day, the power consumption can be reduced, and in a dark environment such as at night. However, it is highly functional because it can be used as a transparent direct viewing type.

In addition, since the main body of the device, the mirror surface, and the lighting are integrated, it is highly portable (the mirror surface can be used for makeup, and the lighting can be used as a night light).

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, in which the first position is a sectional view of a main part of a transmissive-reflective liquid crystal television, FIG. A block diagram showing the connection relationship between the circuit block and the liquid crystal panel, Fig. 2 is a sectional view of the main part of a conventional transmissive-reflective liquid crystal television, and Figs. 3 to 5 are examples of the present invention. 4 is a circuit diagram showing the first example of a three-stage bidirectional shift register, and FIG. It is a circuit diagram showing an example. 101.201... Mirror surface, 102...
Lighting, 106.203 Old... Liquid crystal panel, 104... Rotating connection part, 105.302... Main body, 1) 1... Signal electrode drive circuit, 301... ...
...Matrix panel. Figure 1

Claims (7)

[Claims] (1) It has a matrix panel that displays an image by adjusting the amount of transmitted light, the matrix panel and the main body of the small image display device are connected by a rotating connection part, and a mirror surface that reflects a virtual image of the displayed image of the matrix panel is provided. A small-sized image display device having a structure in which a lighting device is provided on a surface opposite to the surface of the small-sized image display device main body on which the mirror surface is arranged, and the lighting device and the matrix panel can be arranged in a stacked manner, A compact image display device comprising a signal electrode drive circuit that distributes image data to signal electrodes of a panel in both directions. (2) The small-sized image display device according to claim 1, wherein the matrix panel is a liquid crystal panel. (3) The small-sized image display device according to claim 1, wherein the displayed image is a television image. (4) The small-sized image display device according to claim 1, wherein the lighting device is an EL lighting. (5) The compact image display device according to claim 1, wherein the lighting device is a fluorescent lamp. (6) A small-sized image display device according to claim 1, wherein the signal electrode drive circuit has a bidirectional shift register. (7) The small-sized image display device according to claim 1, wherein the signal electrode drive circuit selects and inputs either the normal output or the inverted output of the binary counter as the input signal of the decoder circuit.