JP2001021913A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To substantially reduce the number of connecting points and realize highly reliable signal transmission, without generating unwanted electromagnetic wave radiation even in the case of a high-density and high-definition display, or even in the case of a large-scale display. SOLUTION: Signal voltage applying elements 4a-4d and scanning voltage applying elements 7a-7d are directly mounted on a glass substrate 2a, respectively. Light-emitting means 22, 23 convert input electric signals into light signals for light signal transmission. Consequently, even in the case of high density and high definition display for which a high transmission frequency and a high rate data transmission are required, and even in the case of a large-scale screen for which a long-length transmission path is required, it is possible to eliminate in principle unnecessary radiation in the transmission line of control clock signals or display data signals to the signal voltage applying elements 4a-4d, and also substantially reduce the number of electric wiring and connecting points, and thus improve mountability and reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal transmission system and its form in a liquid crystal display device using a liquid crystal display element having a plurality of signal electrodes and a plurality of scanning electrodes.

[0002]

2. Description of the Related Art In a conventional liquid crystal display device, a display data signal, a control signal, and the like are transmitted to a signal voltage applying element.
Alternatively, a printed circuit board, a flexible substrate, a TCP (Tape)
Carrier Package) is used to perform electrical signal transmission using metal such as copper as wiring material.

FIG. 17 shows an example. In FIG. 17, a liquid crystal is composed of a glass substrate 2 having a plurality of signal electrodes (not shown) and a plurality of scanning electrodes (not shown), and an opposing glass substrate 3, and having an effective display area indicated by wavy lines. There is a display element 1. A signal voltage applying element 4 and a scanning voltage applying element 7 are mounted on TCPs 5 and 8, respectively.

FIG. 17 shows an example in which each of the number of applied elements is four, which is arbitrarily determined by the size of the liquid crystal display element 1, the number of display pixels, the display density (pixel pitch), and the like.
The general internal configuration of the signal voltage applying element 4 is, as shown in FIG.
An A conversion unit 32 is provided. When a power supply voltage input 33, a display data signal 34, a control clock signal 35, a start signal 36, and a data load signal 37 are given from outside, the display data signal 34 is latched for each control clock signal immediately after the start signal 36 arrives. The carrier signal 38 is output after a predetermined number of channels have been captured by the controller 31, and the signal voltage application element 4 at the next stage is started.

In the signal voltage applying element 4 at the next stage, the display data signal 34 is taken into the data latch 31 every control clock signal immediately after receiving the start signal from the preceding stage, and a signal of a predetermined number of channels is taken. Thereafter, the carrier signal 38 is output, and the signal voltage application element 4 at the next stage is started. In this manner, the display data signal is analog-converted by the D / A converter 32 by the data load signal 37 arriving after the display data signal for one scanning period is taken into the data latches of all the signal voltage applying elements. The signal is applied to the signal electrode of the liquid crystal display element via the output terminal 39.

In the case of the scanning voltage applying element 7, a scanning voltage pulse is sequentially applied to the scanning electrodes every scanning period from a plurality of output terminals of the scanning voltage applying element by an operation similar to that of the signal voltage applying element. Is done. Then, this operation is repeated by the subsequent scanning voltage application element, and the scanning of one screen is completed. A detailed description of this operation is omitted.

The signal line bus wiring board 6 and the scanning line bus wiring board 9 are provided with connecting means 14 and 15 from a controller board 10 incorporating an input connector 11, a power supply device 12 such as a DC / DC converter, a signal processing LSI 13, and the like. A power supply, a control signal, and a display data signal required for driving the liquid crystal display element 1 are supplied through the power supply. In the figure, reference numeral 16 denotes a plurality of power supply lines for driving signal electrodes, 17 denotes a plurality of display data signals and a plurality of control signal lines such as clocks, and 18 denotes a plurality of signal voltage applying elements 4 to operate sequentially. Signal lines or carrier signal lines. Similarly, in the figure, reference numeral 19 denotes a plurality of power supply lines for driving the scanning electrodes, reference numeral 20 denotes a plurality of control signal lines such as a control clock, and reference numeral 21 denotes a start for sequentially operating the plurality of scanning voltage applying elements 7. A signal line or a carry signal line is shown.

The signal voltage applying element 4 and the scanning voltage applying element 7 process power and signals received from these bus lines to drive the liquid crystal display. In the related art, a series of these transmissions uses a printed wiring board, a flexible substrate, a TCP, or the like, as described above, and consistently transmits electric signals.

[0009]

In such a conventional configuration, there is a problem of unnecessary radiation from the display data transmission path to the signal voltage applying element, particularly from the signal line bus wiring board 6. At present, it is costly to add a countermeasure member such as a filter or a shield material in order to reduce unnecessary radiation to a level at which there is no practical problem.

In the future, the number of display pixels of the liquid crystal display panel will be 20
It is expected that the number of display gradations will increase from 100,000 pixels to 5 million pixels, and the number of display gradations will increase to 256 gradations of 8-bit configuration for each color of RGB and 1024 gradations of 10-bit configuration. In LCD panels that require the above, the data transmission rate tends to increase and the number of transmission lines tends to increase at the same time. In the electrical signal transmission method of technology, even if the data transmission frequency can be suppressed to some extent by making full use of processing technology such as screen division drive and parallelization of display data transmission, the number of wires and transmission There is a problem that the energy required for unnecessary radiation increases due to the length of the road, and the cost for the countermeasure members increases.

On the other hand, it is necessary to increase the density and definition of the members for forming the transmission path, and as the density increases, the connection accuracy of the components becomes stricter, the mounting difficulty increases, and the reliability increases. There is also the problem of lowering. Also, if the transmission path cannot be made dense enough, the transmission path will be enlarged,
There is a problem that the size does not fit in a desired device size.

The scanning voltage system has a lower frequency and a smaller number of bus lines than the signal voltage system.
Although there is no serious problem, a long bus wiring board is required as the screen becomes larger, and the cost is increasing. The present invention eliminates the need to add countermeasures such as filters and shielding materials to reduce unnecessary radiation from the display data transmission path to the signal voltage applying element, greatly reducing the number of connection points, and providing a highly reliable signal. It is an object to provide a liquid crystal display device capable of realizing transmission.

[0013]

In order to solve these problems, the present invention is characterized in that display data transmission to a signal voltage applying element is realized by signal transmission using light without using an electric wire. . According to the configuration of the present invention, the display data signal or a part of the problematic control signal is processed by the signal processing L.
A high transmission frequency and a large amount of data transmission are required by transmitting light with light in a transmission means that configures a transmission path with a fixed direction from the SI to the signal voltage application element or scanning voltage application element. Whether it is a high-density, high-definition display or a large screen that requires a long transmission path, the number of connection points can be greatly reduced without generating unnecessary radiation of electromagnetic waves. Highly reliable signal transmission can be realized.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device according to a first aspect of the present invention includes a liquid crystal display element having a plurality of signal electrodes and a plurality of scanning electrodes, and a plurality of liquid crystal display elements connected to the signal electrodes for applying a signal voltage. And a plurality of scanning voltage applying elements connected to the scanning electrode and applying a scanning voltage, wherein the signal voltage applying element or the scanning voltage applying element is transmitted to the signal voltage applying element by optical transmission. Is transmitted.

According to a second aspect of the present invention, there is provided a liquid crystal display device.
In claim 1, optical signals are sequentially and subordinately transmitted to a plurality of signal voltage applying elements or scanning voltage applying elements through an optical transmission means having at least one pair of two reflecting surfaces facing each other. It is characterized by the following. The liquid crystal display device according to the third aspect of the present invention is the first aspect.
Wherein the optical signal is transmitted in parallel to a plurality of signal voltage applying elements or scanning voltage applying elements through a plurality of optical transmitting means having reflecting surfaces in the same direction.

According to a fourth aspect of the present invention, there is provided a liquid crystal display device.
According to Claim 2 or Claim 3, the signal voltage applying element or the scanning voltage applying element includes a light receiving element or a pair of light receiving elements and a light emitting element. According to a fifth aspect of the present invention, in the liquid crystal display device according to the second or third aspect, the light transmission means is made of one light-transmitting resin material and has a plurality of metal reflecting surfaces. In accordance with the arrangement of the signal voltage applying element or the scanning voltage applying element, and is formed by a filling method or an integral molding method in the resin material.

Hereinafter, each embodiment will be described with reference to FIGS. FIG. 1 shows a system configuration diagram of the present invention.
A liquid crystal display element 1a comprising a glass substrate 2a having a plurality of signal electrodes (not shown) and a plurality of scanning electrodes (not shown), and an opposing glass substrate 3a and having an effective display area indicated by a wavy line. There is.

The signal voltage applying elements 4a to 4d and the scanning voltage applying elements 7a to 7d are directly mounted on the glass substrate 2a, respectively. This form is COG (Chip On
Glass), which has been put into practical use, but in the conventional COG, a material such as a separate flexible substrate is used for all bus wirings such as a power supply, display data, and control signals.

In the present invention, since the number of wires is small and the frequency is low, the influence on unnecessary radiation is small. The transmission path is formed on a glass substrate, or is implemented in a separate form similar to that of the related art, and a description on mounting is omitted. These include the power supply lines 16a and 19a, the start signal or carrier signal lines 18a and 21a of FIG. 1, and the connection means 14a and 15a.

The controller board 10a includes an input connector 11, a power supply 12, a signal processing LSI 1
The signal processing LSI 13a is basically the same as the conventional one except that the conventional display data signal is converted into a serial signal and output. High-speed signals such as control clock signals and display data are output as differential signals, and the light emitting units 22 and 23 are connected by shielded cables.
Is recommended but not a requirement of the present invention.

As shown in FIG. 2, the light emitting means 22 and 23 are provided with a driver 27 and a light emitting element 2 for converting an electric signal into an optical signal.
8, and converts the input electric signal 26 into an optical signal 29. As shown in FIG. 3, one example of the signal voltage applying elements 4a to 4d has a configuration in which a light receiving element 40, a buffer amplifier 41, and a serial / parallel converter 42 are added to the conventional signal voltage applying element 4 of FIG.

In the case of the signal voltage application element 4 a shown in FIG. 3, the light signal 43 including the control clock signal and the display data signal is converted into an electric signal by the light receiving element 40 and amplified by the buffer amplifier 41. Thereafter, the control clock signal 35 is guided to the shift register 30 as in the conventional case, the display data signal is converted to a parallel signal by the serial / parallel converter 42, and then to the data latch 31 as in the conventional case. Subsequent operations for driving the liquid crystal display element are the same as those in the related art.

FIG. 4 shows another configuration in which a driver 44 and a light emitting element 45 are added to the configuration of FIG. This is a configuration in which means for generating an optical signal 46 to the next stage for cascade connection is provided, and the electric signal output from the buffer amplifier 41 is guided to the shift register 30 and the serial / parallel converter 42, and at the same time, a driver is provided. The light is also guided to 44 and is converted into the original optical signal 46 by the light emitting element 45.
How to use them will be described later.

The same applies to the scanning voltage applying element 7a and the like. Reference numerals 24 and 25 in FIG. 1 denote optical transmission means having a configuration which will be described later, and convert the optical signal 29 emitted from the light emitting means 22 or 23 into a plurality of signal voltage applying elements 4a to 4d.
Alternatively, the signal is transmitted to the scanning voltage applying elements 7a to 7d. next,
The optical transmission means 24, 25 will be described with reference to FIG.

In FIG. 5A, reference numeral 50 denotes a part of a columnar optical transmission line made of a light-transmitting solid material, and the reflecting surfaces 51a and 51b.
Has a light reflectivity formed by a method such as attaching a reflector or depositing a metal film. 52a, 52b,
52c represents light incident, reflected, and emitted, respectively.
2 illustrates a transmission state of light inside an optical transmission line. FIG.
Reference numeral 53 shown in (b) denotes a part of an optical transmission line having one reflecting surface 51b.

FIG. 6 shows the optical transmission lines 50 and 53 of FIG. 5 and the auxiliary members 54 and 55 made of a material having no reflection surface and having any light transmittance as shown in FIG. 6B shows an optical transmission path 56 having an integrated configuration as shown in FIG. The dimension between the reflecting surfaces facing in the same direction is equal to the arrangement pitch of the signal voltage applying elements 4a to 4d or the scanning voltage applying elements 7a to 7d in FIG. 1, and the light receiving element 40 and the light emitting element 45 of these voltage applying elements are provided. It becomes the arrangement corresponding to.

FIG. 7 shows another configuration of the optical transmission means 24, 25. In FIG. 7, an optical transmission line 57 having the same configuration as the optical transmission line 53 of FIG. 5B and an auxiliary member 58 having light transmittance but having no reflection surface are arranged in a line as shown in FIG. In addition, the optical transmission path 59 is stacked vertically and integrated as shown in FIG. The dimension between the reflecting surfaces is equal to the arrangement pitch of the signal voltage applying elements 4a to 4d or the scanning voltage applying elements 7a to 7d in FIG. 1 and corresponds to the light receiving element 40 of these voltage applying elements.

FIG. 8 shows still another configuration of the optical transmission means 24, 25. 8A and 8B, an optical transmission line 60 similar to the optical transmission line 53 shown in FIG. 5B and an auxiliary member 61 made of a material having no reflection surface and having any light transmittance are used as shown in FIG. 8A. The optical transmission lines 62 are arranged in a line, and are superposed and integrated in a lateral direction as shown in FIG. 8B.
The dimensions between the reflection surfaces are the signal voltage application elements 4a to 4a in FIG.
4d or the arrangement pitch of the scanning voltage applying elements 7a to 7d, which is an arrangement corresponding to the light receiving elements 40 of these voltage applying elements.

FIG. 9 shows still another configuration of the optical transmission means 24, 25. FIG. 9A is a partially enlarged view of a slit 6 in which a plate-shaped piece 63 having a reflection characteristic by metal plate or metal film deposition is provided in a light-transmitting solid material 64.
5 is an optical transmission path 67 having a structure of a plurality of outgoing light-side reflecting surfaces 63a to 63d and a plurality of incoming light-side reflecting surfaces 63a 'to 63c'. Reference numerals 52a, 52b, and 52c denote incident, reflected, and emitted light, and indicate the transmission state of light inside the optical transmission line 67.

FIG. 9B shows an optical transmission line 68 having a structure similar to that of FIG. 9A, but having reflecting surfaces 66a to 66d having different heights arranged only in one direction. Is shown. 52a and 52c show the light transmission state. Next, FIG.
10 is a mounting conceptual diagram of a liquid crystal display device using the optical transmission line shown in any of FIGS.

FIGS. 10 to 12 show the optical transmission line 5 shown in FIG.
6 shows a specific example using. FIG. 10 shows a process in which the light transmission path 56 shown in FIG. 6 is arranged close to one side of the light guide plate 70 of the backlight system of the liquid crystal display device with the light shielding film 71 interposed therebetween. FIG. 11 shows a configuration 4a ′ shown in FIG. 4 on a glass substrate 72 having signal electrode blocks 73a to 73d composed of a plurality of signal electrodes and a plurality of scanning electrodes (not shown in FIG. 11). The signal voltage applying elements 74a to 74d are mounted by the COG method, and are paired with a plurality of signal electrode blocks 73a to 73d.
Each output terminal of each signal voltage applying element (output terminal 39 in FIG. 4)
ACF (Anisotropic Conducti) is applied to each signal electrode.
ve Film).

In this step, the glass substrate 72 is actually the liquid crystal display element 1a itself in FIG. 1 and has a structure in which the opposing glass substrate 3a is integrated with the glass substrate 2a. Therefore, illustration of a portion corresponding to the counter glass substrate 3a is omitted. FIG.
By combining FIGS. 10 and 11 vertically, the reflection plates 80a to 80g of the optical transmission path 56 are used as signal voltage applying elements 74a to 74g.
d light receiving elements 75a to 75d and light emitting elements 76a to 76d
6C shows a state in which it is fixed at a related position facing 6c.

Further, an electric transmission means 78 such as a signal cable and a light emitting element 77 having the structure shown in FIG. 2 are fixed at a position facing the entrance of the optical transmission path 56. The control clock signal or the display data signal guided by the electric transmission means 78 from the controller board 10a of FIG.
Is converted into an optical signal 79a. The optical signal 79a entering the optical transmission path 56 is reflected at a right angle by the first reflecting surface 80a,
It becomes an optical signal 79b, passes through the optical transmission path 56, penetrates the glass substrate 72, and receives the light receiving element 75 of the signal voltage applying element 74a.
reaches a. Optical signal 79b entering the light receiving element 75a
Is a light receiving element 75 as described in FIGS.
is converted into an electric signal at a.

Next, the signal is amplified by the buffer amplifier 41, the control clock signal is converted to the shift register 30, and the display data signal is converted to the original parallel signal in the next serial / parallel conversion section, and then is taken into the data latch circuit. . At the same time, the electric signal output from the buffer amplifier is converted into an original optical signal 79c through a driver and a light emitting element. The optical signal 79c penetrates the glass substrate 72, enters the optical transmission path 56, is reflected at a right angle by the reflection surface 80b, becomes an optical signal 79d, and travels through the optical transmission path toward the next reflection surface 80c. Here again, the light signal 79 reflected at right angles
e reaches the light receiving element 75b of the signal voltage applying element 74b in the next stage. Thereafter, through the same process, the original optical signal 79a is transmitted to the final-stage signal voltage application element 74d.

As described above, in all the signal voltage applying elements, the optical signal is converted into the electric signal, and the signal voltage is applied to each signal electrode by the same constant control and signal processing as in the prior art. FIGS. 13 and 14 show the optical transmission line 5 shown in FIG.
9 shows a specific example in which 9 is used. FIG. 13 shows a process in which the light transmission path 59 of FIG. 7 is disposed close to one side of the light guide plate 70 of the backlight system of the liquid crystal display device with the light shielding film 71 interposed therebetween.

FIG. 14 is the same as FIG. 12 except that signal voltage applying elements 83a to 83d having the configuration of 4a shown in FIG. 3 are mounted by a COG method as signal voltage applying elements, and a plurality of signal electrode blocks 82a to 82d are provided. Paired with 82d,
The liquid crystal display element 81 having the same connection structure as described above is combined with the liquid crystal display element 81 shown in FIG.
87d is the light receiving element 8 of the signal voltage applying elements 83a to 83d
It shows a state where it is fixed at a related position facing 4a to 84d. Further, an electric transmission means 85 such as a signal cable is used.
The light emitting element composite 86 having the configuration of FIG.
9 is fixed at a position facing the entrance 9.

A control clock signal or a display data signal guided by the electric circuit 85 from the controller board 10a of FIG. 1 is converted into light signals 88a to 88d by the light emitting element composite 86. Light emitting element complex 8 from controller board 10a
12 is the same as that in FIG. 12, each light emitting element of the light emitting element composite 86 generates optical signals 88a to 88d having the same information at the same timing, and
Radiate to 9.

The optical signal 88a entering the optical transmission line 59 is reflected at a right angle by the reflection surface 87a to become an optical signal 89a, passes through the optical transmission line 59, penetrates the glass substrate of the liquid crystal display element 81, and applies a signal voltage. The light reaches the light receiving element 84a of the element 83a. The light signal 89a that has entered the light receiving element 84a is converted into an electric signal by the light receiving element 84a as described in FIG. Next, the signal is amplified by a buffer amplifier, the control clock signal is converted to a shift register, and the display data signal is converted to an original parallel signal by a serial / parallel conversion unit at the next stage, and then is captured by a data latch circuit. The other optical signals 88b to 88d are also reflected at right angles by the reflection surfaces 87b to 87d, and then penetrate the upper transparent auxiliary material and the glass substrate portion of the liquid crystal display element 81 to form signal voltage applying elements 83b to 83d. 83d, and through the same process as above,
Optical signals are converted to electrical signals. In this manner, a signal voltage is applied to each signal electrode by the same constant control and signal processing as in the related art.

FIGS. 15 and 16 show the optical transmission line 6 shown in FIG.
2 shows a specific example using. FIG. 15 shows a process in which the light transmission path 62 of FIG. 8 is arranged close to one side of the light guide plate 70 of the backlight system of the liquid crystal display device with the light shielding film 71 interposed therebetween. FIG. 16 is the same as FIG. 14 except that the signal voltage applying elements 92a to 92d
The liquid crystal display element 9 is mounted in the COG system in a stepwise manner at a horizontal arrangement pitch, paired with a plurality of signal electrode blocks 91a to 91d, and connected in the same manner as described above.
0 is a combination of FIG. 15 and the reflector 9 of the optical transmission line 62.
5A to 95D show a state where the signal voltage applying elements 92a to 92d are fixed at the positions facing the light receiving elements 93a to 93d. Further, a composite 94 of an electric transmission means 85 such as a signal cable and a light emitting element having the configuration shown in FIG. 2 is fixed at a position facing the entrance of the optical transmission path 62.

As described above, the optical signals 96a to 96d generated by the light emitting element composite 94 are radiated to the optical transmission line 62 and undergo the same process as in FIG. Further, in the mounting configuration of FIG.
Instead of using the optical transmission line 67 shown in FIG. 9A, the optical transmission line 68 shown in FIG. Even so, the configuration and operation are the same.

The light guide plate 70 and various light transmission paths are optically separated by a light shielding film 71 so as to prevent the light of the backlight from affecting the optical signal transmission.
If there is light other than a signal that may interfere with light transmission, such as light from the backlight or outside light, it is needless to say that additional light blocking means must be provided.

Although the signal voltage application system has mainly been described above, a similar configuration can be applied to the scanning voltage application system. However, since the description is similar, the description is omitted.

[0043]

As described above, according to the configuration of the present invention, the configuration in which a plurality of signal voltage applying elements sequentially and subordinately receive optical signals and the embodiment in which optical signals are received in parallel have been described. In either case, a transmission means having a transmission path having a fixed direction in a space from the signal processing LSI to the signal voltage applying element or the scanning voltage applying element is used to transmit the display data signal or a part of the problematic control signal. In the case of high-density and high-definition display requiring high transmission frequency and a large amount of data transmission by transmitting optical signals converted to serial, a long transmission path is required. Even in the case of large screens, unnecessary radiation in the transmission path of the control clock signal or display data signal to the signal voltage application element can be eliminated in principle, and the number of electrical wirings and connection points is greatly reduced. Reduction can, implementation of the improvement, it is possible to improve the reliability. Also, by adopting a similar optical transmission method in the scanning voltage application system, the mounting form can be simplified and the reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a drive system of a liquid crystal display device of the present invention.

FIG. 2 is a block diagram of a light emitting means used in the present invention.

FIG. 3 is a block diagram showing an electrical configuration of the signal voltage applying element of the present invention.

FIG. 4 is a block diagram showing another electrical configuration of the signal voltage applying element of the present invention.

FIG. 5 is a diagram of one member constituting the optical transmission line and a diagram of another member constituting the optical transmission line.

FIG. 6 is a diagram showing an optical transmission line integrated with a member development view of the optical transmission line.

FIG. 7 is a diagram showing an optical transmission line integrated with a member development view showing another example of the optical transmission line.

FIG. 8 is a diagram showing an optical transmission line integrated with a member development view showing another example of the optical transmission line.

FIG. 9 is a partial view and an explanatory view showing another example of the optical transmission line.

FIG. 10 is a diagram showing a process in which an optical transmission line is arranged close to a light guide plate.

FIG. 11 is a diagram showing a state in which a signal voltage applying element is mounted on a glass substrate and a signal electrode is connected to an output terminal of the signal voltage applying element.

FIG. 12 is a diagram showing the process of optical transmission by combining FIGS. 10 and 11;

FIG. 13 is a diagram showing a process in which another optical transmission line is arranged close to the light guide plate.

FIG. 14 is a diagram showing a process of optical transmission in another implementation example of an optical transmission line.

FIG. 15 is a diagram showing a process in which still another optical transmission line is arranged close to the light guide plate.

FIG. 16 is a diagram showing a process of optical transmission in still another optical transmission line mounting example.

FIG. 17 is a diagram illustrating an example of a drive system configuration of a conventional liquid crystal display device.

FIG. 18 is a block diagram showing an electrical configuration of a conventional signal voltage applying element.

[Explanation of symbols]

1a Liquid crystal display element 2a Glass substrate having electrodes 3a Opposite glass substrate 4a-4d Signal voltage applying elements 74a-74d, 83a-83d, 92a-92d
Signal voltage applying element 5, 8 TCP (Tape Carrier Package) 6 signal line bus wiring board 7, 7a scanning voltage applying element 9 scanning line bus wiring board 10, 10a control board 11 input connector 12 power supply 13, 13a signal processing LSI 14a , 15a Connecting means 16a, 19a Power supply line 17a Signal line 18a, 21a Start signal line or carrier signal line 20 Control signal line 22, 23 Light emitting means 24, 25 Optical transmission means 26 Input electric signal 27, 44 Driver 28, 45, 76a To 76d, 77, 86, 94 Light emitting element 29 Optical signal 30 Shift register 31 Data latch 32 D / A converter 33 Power supply voltage input 34 Display data signal 35 Control clock signal 36 Start signal 37 Data load signal 38 Carrier signal 39 Output terminal 40, 75a-75 d, 84a-84d, 93a-93
d Light receiving element 41 Buffer amplifier 42 Serial / parallel converter 43, 79a to 79k, 88a to 88d, 89a to 89
d, 96a to 96d, 97a to 97d Optical signal 50, 53, 56, 57, 59, 60, 62, 67, 6
8 Optical transmission lines 51a, 51b, 63a to 63d, 63a 'to 63
c ', 66a to 66d, 80a to 80g, 87a to 87
d, 95a to 95d Reflecting surface 52a, 52b, 52c Light 54, 55, 58, 61 Light transmission path auxiliary material 63 Reflection piece 64 Solid material 65 Slit 70 Backlight light guide plate 71 Light shielding film 72, 81, 90 Glass substrate 73a to 73d, 82a to 82d, 91a to 91d
Signal electrode block 78,85 Electrical transmission means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H091 FA45Y FA48Y FA50Y FB09 FC02 FC26 FC30 FD12 FD21 GA13 LA11 LA13 MA10 2H092 GA45 GA60 GA64 JA24 MA04 NA25 PA06 PA07 2H093 NA16 NA80 NC23 NC24 NC26 NC34 NC73 NC81 NC90 ND32 NE40 ND40 NH15 NH16 5C094 AA05 AA14 AA31 AA41 AA48 AA53 AA56 AA60 BA43 CA19 DA09 DA13 DB01 DB02 EA04 ED01 ED11 ED20 FA01 FA02 FB01 GA10

Claims (5)

[Claims] A liquid crystal display element having a plurality of signal electrodes and a plurality of scanning electrodes; a plurality of signal voltage applying elements connected to the signal electrodes for applying a signal voltage; and a scanning voltage connected to the scanning electrodes. A liquid crystal display device comprising: a plurality of scanning voltage applying elements for applying a signal; and wherein the signal is transmitted to the signal voltage applying element or the scanning voltage applying element by optical transmission. 2. An optical signal is sequentially and subordinately transmitted to a plurality of signal voltage applying elements or scanning voltage applying elements through optical transmission means having at least one pair of two reflecting surfaces facing each other. The liquid crystal display device according to claim 1. 3. An optical signal is transmitted in parallel to a plurality of signal voltage applying elements or scanning voltage applying elements through a plurality of optical transmission means having reflecting surfaces in the same direction. Liquid crystal display device. 4. The liquid crystal display device according to claim 2, wherein said signal voltage applying element or scanning voltage applying element comprises a light receiving element or a pair of light receiving elements and a light emitting element. 5. The optical transmission means is made of one light-transmissive resin material, and a piece having a plurality of metal reflecting surfaces is arranged in accordance with an arrangement of a signal voltage applying element or a scanning voltage applying element. 4. The liquid crystal display device according to claim 2, wherein the liquid crystal display device is formed by a filling method or an integral molding method in a resin material.