JP2002366126A - Display device and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which is suitably adaptive to an increase in size and an increase in resolution. SOLUTION: Transmission path for signals from a signal control circuit 17 to data electrode driving circuits 15A to 15C are composed of optical waveguides 20A, 20B, and 20C as optical transmission lines capable of transmitting optical signals and transmission paths of signals from a signal control circuit 17 to address electrode driving circuits 16A and 16B are composed of optical waveguides 21A, 21B, 21C, and 21D as optical transmission lines capable of transmitting optical signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a display device such as a liquid crystal display device and an organic EL (electroluminescence) display device and a method of manufacturing the same, and more particularly, to suitably respond to an increase in size and a higher resolution. It was made.

[0002]

2. Description of the Related Art In a conventional liquid crystal display (LCD), for example, a signal control circuit for generating an image signal, a clock signal, and a synchronizing signal (vertical synchronizing signal, horizontal synchronizing signal), a data electrode driving circuit, and an address Between the electrode drive circuit
They were connected via a bus consisting of electrical wiring. By the way, the number of bits of the data bus for transmitting the image signal is 24 (= 8 × 3) if, for example, each of RGB (red, green, blue) has 256 gradations (8 bits).

[0003] When the display unit is enlarged and the resolution is increased, the data electrodes and the address electrodes of the display unit are arranged in a plurality of blocks so that the data writing period and the scanning period are within a realistic time for the display device. In some cases, a data electrode driving circuit or an address electrode driving circuit is provided for each block, and a signal is input in parallel from the signal control circuit to each data electrode driving circuit or each address electrode driving circuit. .

[0004]

On the other hand, with an increase in the size and resolution of the display device, the operating frequency has been increased and the connection between the signal control circuit, the data electrode drive circuit and the address electrode drive circuit has been established. EMI (electromagnetic interference)
Also, skew between a plurality of ICs constituting the data electrode driving circuit and the address electrode driving circuit becomes a problem.
Such a problem cannot be dealt with by a method of dividing the data electrode drive circuit and the address electrode drive circuit into a plurality of blocks as described above.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide a display device having a configuration capable of suitably coping with an increase in the size of a display section and an increase in resolution, and a method of manufacturing the same. I have.

[0006]

In order to achieve the above object, a display section having pixels arranged at intersections of data electrodes and address electrodes arranged in a grid pattern, and A data electrode drive circuit for driving; an address electrode drive circuit for driving the address electrode; and a signal necessary to drive the data electrode drive circuit and the address electrode drive circuit. A signal control circuit for supplying an electrode drive circuit;
A signal transmission path for transmitting a signal between the signal control circuit and the data electrode drive circuit and the address electrode drive circuit, a display device comprising:
An optical transmission line capable of transmitting an optical signal is provided, and a light emitting element for converting an electric signal into an optical signal is provided between the signal control circuit and the signal transmission line, and the signal transmission line and the data electrode are provided. A light receiving element for converting an optical signal into an electric signal was provided between the driving circuit and the address electrode driving circuit.

Further, the display section, the data electrode drive circuit, the address electrode drive circuit, the signal control circuit, the signal transmission path, the light emitting element, and the light receiving element are provided on the same substrate.

The display section, the data electrode driving circuit, the address electrode driving circuit and the light receiving element are provided on one surface of a transparent substrate, and the signal control circuit is provided on the other surface of the transparent substrate. The signal transmission path and the light emitting element are provided, and the optical signal transmitted through the signal transmission path propagates between the front and back surfaces of the transparent substrate and enters the light receiving element.

On the other hand, according to a method of manufacturing a display device, pixels are arranged on one surface of a transparent first substrate so as to correspond to respective intersections of data electrodes and address electrodes wired in a grid. While a display unit is provided, a polymer optical waveguide is formed on the second substrate, and the polymer optical waveguide is formed on the polymer optical waveguide.
A data electrode driving circuit for driving the data electrode; an address electrode driving circuit for driving the address electrode; a light receiving element having a signal output side connected to a signal input side of the data electrode driving circuit; A light receiving element connected to a signal input side of a drive circuit; a signal control circuit for generating and outputting signals necessary for driving the data electrode drive circuit and the address electrode drive circuit; After providing a light emitting element that converts the electrical signal into an optical signal and enters the polymer optical waveguide, so as to sandwich the polymer optical waveguide,
A third substrate is attached to the second substrate, and the second substrate is removed from the polymer optical waveguide, and the polymer of the light emitted from the light emitting element is added to the polymer optical waveguide. After forming a mirror for incidence on the type optical waveguide and a mirror for incidence on the light receiving element, the third surface of the third substrate is formed on the other surface of the first substrate with the polymer type optical waveguide inside. Substrate was attached.

[0010] Also, a display unit comprising pixels disposed on one surface of a transparent first substrate corresponding to respective intersections of data electrodes and address electrodes wired in a grid,
A data electrode driving circuit for driving the data electrode; an address electrode driving circuit for driving the address electrode; a light receiving element having a signal output side connected to a signal input side of the data electrode driving circuit; A light receiving element connected to the signal input side of the drive circuit, and a polymer optical waveguide formed on the second substrate, and a mirror for incidence on the light receiving element is formed on the polymer optical waveguide. A signal control circuit for generating and outputting signals necessary for driving the data electrode drive circuit and the address electrode drive circuit, and converting an electric signal generated by the signal control circuit into an optical signal And a light-emitting element incident on the polymer-type optical waveguide, and then attaching a third substrate to the second substrate so as to sandwich the polymer-type optical waveguide. And removing the second substrate from the polymer-type optical waveguide and forming a mirror for allowing light emitted from the light-emitting element to enter the polymer-type optical waveguide. The third substrate was attached to the other surface with the polymer optical waveguide inside.

Further, since the signal transmission path is an optical transmission path, and a light emitting element and a light receiving element are provided before and after the optical transmission path, a signal generated by the signal control circuit based on a data signal or the like from outside the display device is: The light is converted into an optical signal in the light emitting element and transmitted through the signal transmission path. The light receiving element is converted into an electric signal and transmitted to the data electrode driving circuit and the address electrode driving circuit. For this reason, EMI when a signal is transmitted between the signal control circuit and the data electrode drive circuit and the address electrode drive circuit, and each of a case where a plurality of data electrode drive circuits and a plurality of address electrode drive circuits are provided. There is no problem with skew between ICs.

Further, a display portion, a signal transmission line, and the like are provided on one substrate. Specifically, since a signal transmission line is provided around a region where the display portion is formed, when viewed from the outside, an electrical portion is provided. This is the same as a conventional display device having a signal transmission path.

In particular, a structure downstream of the light receiving element is provided on one surface side of the transparent substrate, and a structure upstream of the signal transmission path is provided on the other surface side of the transparent substrate. Since the signal transmission is performed by transmitting light in the thickness direction through the transparent substrate, the both sides of the transparent substrate can be effectively used.

Since the display device is manufactured using the second substrate and the third substrate in addition to the transparent first substrate, the display device can be manufactured relatively easily. Can be. As a method of removing the second substrate, for example, Japanese Patent Application Laid-Open No. H10-12592 previously proposed by the present applicant has been proposed.
9, JP-A-10-125930, JP-A-10-125930
The technology described in, for example, Japanese Patent Application Laid-Open No. 0-125931 can be applied.

The timing and method for providing the display portion on one surface of the first substrate are arbitrary, and may be provided before the third substrate is attached or after the third substrate is attached. It may be provided.

Similarly, the timing and method for providing the display section, the data electrode drive circuit, the address electrode drive circuit, and the light receiving element on one surface of the first substrate are arbitrary, and the order in which these elements are provided is also arbitrary. is there. Further, all of the elements may be provided on one surface of the first substrate before the third substrate is attached, or some of the elements may be provided before the third substrate is attached. Alternatively, another part may be provided on one surface of the first substrate after attaching the third substrate.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a plan view showing the entire configuration of the display device 1, and FIG. It is sectional drawing.

That is, the display device 1 is a device used as, for example, a display of a personal computer, and includes a (Thin Film Transistor) type liquid crystal display device and an organic EL (Electroluminum).
Escence) It is suitably used for display devices and the like.

On the transparent substrate 10, a plurality of data electrodes 11,..., 11 extending in the vertical direction and a plurality of address electrodes 12,. , 13 corresponding to each intersection of the address electrodes 12 and the display electrodes 1.
4 are configured. Although a specific structure of the pixel 13 is not particularly illustrated, a pixel structure similar to that used in a known liquid crystal display device, an organic EL display device, or the like is applied.

Each data electrode 11 has a plurality (in this example,
The data electrode driving circuit 15 is divided into three blocks.
A, 15B, and 15C, and each address electrode 12 is divided into a plurality of (two in this example) blocks and connected to any of the address electrode driving circuits 16A and 16B. .

The data electrode driving circuits 15A to 15C are circuits for controlling the potential of the data electrode 11 connected thereto, and the address electrode driving circuits 16A and 16B
This is a circuit for controlling the connection state between the data electrode 11 and the pixel electrode 13b by driving the address electrode 12 connected thereto. That is, the address electrode driving circuits 16A and 16B allow the arbitrary address electrode 12
Is driven, a conduction state is established between the pixel electrode 13b to which the driven address electrode 12 is connected and the data electrode 11, and data corresponding to the potential on the data electrode 11 is written to the pixel 13. is there.

The signal control circuit 17 supplies necessary signals to the data electrode drive circuits 15A to 15C and the address electrode drive circuits 16A and 16B.

When the signal control circuit 17 receives a data signal, a horizontal synchronizing signal, a vertical synchronizing signal, and a clock signal from an external host (for example, a personal computer), the signal control circuit 17 converts the clock signal, the horizontal synchronizing signal, and the data signal into data electrode driving signals. The clock signal and the vertical synchronizing signal are branched by the number of the address driving circuits 16A and 16B, and the signals after the branching are divided by the data electrode driving circuits 15A to 15C and the address electrodes. The power is supplied to the drive circuits 16A and 16B.

In the present embodiment, the transmission paths of the signals from the signal control circuit 17 to the data electrode driving circuits 15A to 15C are defined as optical waveguides 20A, 20B, 20C as optical transmission paths capable of transmitting optical signals. And the signal control circuit 17 to the address electrode driving circuit 16
The transmission paths of the above signals for A and 16B are the same as the optical waveguides 21A, 21A,
1B, 21C and 21D.

Each of the optical waveguides 20A to 20C between the signal control circuit 17 and the data electrode driving circuits 15A to 15C is represented by a single wide line in FIG. 1, but is actually a multi-bit line. In the case where each of the three colors (R, G, B) is expressed by 8 bits, the amount of the data signal is 2
Since 4 bits (3 colors × 8 bits), 1 bit for the clock signal, and 1 bit for the horizontal synchronization signal, each of the optical waveguides 20A to 20C can transmit a 26-bit signal in parallel. It is a bit line.

On the other hand, each of the optical waveguides 21A to 21A between the signal control circuit 17 and the address electrode driving circuits 16A and 16B.
21D is a 1-bit line, and the optical waveguide 2
1A and 21C transmit clock signals to the optical waveguides 21B and 21C.
D transmits a vertical synchronizing signal.

The signal control circuit 17 and the optical waveguides 20A to 20
C, a surface emitting laser (VCS) as a light emitting element
A plurality of (for example, 78 (= 26 bits × 3 blocks)) light emitting element arrays 23 are provided, and a light emission is similarly provided between the signal control circuit 17 and the optical waveguides 21A to 21D. A light emitting element array 24 provided with a plurality of surface emitting lasers as elements (for example, four (= 2 bits × 2 blocks)) is provided. The signal control circuit 17 includes a light emitting element driver for driving a surface emitting laser included in the light emitting element array 23 and a light emitting element array 24 in addition to the circuit for branching the signal as described above. A light emitting element driver for driving the included surface emitting laser is also included.

On the other hand, between the optical waveguides 20A to 20C and the data electrode driving circuits 15A to 15C, a plurality of photodiodes (for example, 26 photodiodes (= 26
24 bits + 1 bits + 1 bits)), the light receiving element arrays 26A, 26B, and 26C are provided, and the optical waveguides 21A to 21D and the address electrode driving circuit 1 are provided.
Light-receiving element arrays 27A and 27B each provided with a plurality of photodiodes (for example, two (= 1 bit + 1 bit)) as light-receiving elements are arranged between the light-receiving elements 6A and 16B. The data electrode driving circuits 15A to 15A
C also includes an amplifier circuit for current-voltage conversion of a signal photoelectrically converted by the photodiodes in the light receiving element arrays 26A to 26C, and includes an address electrode driving circuit 16A,
16B also includes an amplifier circuit for current-voltage conversion of a signal photoelectrically converted by the photodiodes in the light receiving element arrays 27A and 27B.

Although the two-dimensional arrangement relationship of each element constituting the display device 1 is as described above, actually, as shown in FIG. Have been placed. However, FIG. 2 shows only a part of the configuration of the display device 1.

That is, the surface (one surface) of the transparent substrate 10
The display unit 14 and the data electrode driving circuits 15A to 15C
(Only the data electrode 15A is shown in FIG. 2) and the address electrode driving circuits 16A and 16B (not shown in FIG. 2).
2, light receiving element arrays 26A to 26C (only light receiving element array 26A is shown in FIG. 2), light receiving element array 27A,
27B (not shown in FIG. 2). On the surface of the transparent substrate 10, a TFT (thin film transistor) layer 10A for forming the transistor circuit portion 13a included in the pixel 13 is formed.

On the other hand, the signal control circuit 17, the light emitting element array 23,
The light emitting element array 24 (not shown in FIG. 2) and the optical waveguides 20A to 20C and 21A to 21D (FIG. 2 shows only one bit of the optical waveguide 30 included in the optical waveguide 20A). Provided. Here, the optical waveguide 30 has claddings 30b on both sides in the thickness direction and both sides in the width direction of the core 30a.
It is a polymer type optical waveguide wrapped in a.

Then, of the two ends of the optical waveguide 30 in the optical waveguide direction, the portion on the upstream side in the optical waveguide direction is irradiated from the light emitting elements 23 a included in the light emitting element array 23 in the thickness direction of the transparent substrate 10. The direction of the emitted light is changed by 90 degrees to a direction along the surface of the transparent substrate 10, and a mirror 30c for propagating in the core 30a is provided.

The core 30a is located at the downstream end of the optical waveguide 30 in the optical waveguide direction.
A mirror 30d is provided for changing the direction of the light propagating through the inside by 90 degrees and penetrating between the front and back surfaces of the transparent substrate 10 to face the front surface side.

Therefore, the light receiving element 26a included in the light receiving element array 26A is arranged so that its light receiving surface faces the transparent substrate 10 and overlaps the position where the mirror 30d is formed. The light reflected by the mirror 30d and propagated from the back side to the front side of the transparent substrate 10 is incident on the light receiving surface of the element 26a.

Next, a method of manufacturing the display device 1 according to the present embodiment will be described.

That is, the transistor circuit portion 13a of the pixel 13 is formed on the transparent substrate 10 on which the TFT layer 10A is formed by using the TFT layer 10A, and then necessary electric wiring (data electrode 11, address electrode 11) is formed. 12 and other electrical wirings 10a) are formed. The electrical wiring may be made of a material such that a transparent electrode is used for a portion overlapping the pixel 13 and an aluminum wiring or a gold wiring is used for other portions.

Next, the data electrode driving circuits 15A to 15C and the address electrode driving circuit 16
A, 16B, light receiving element arrays 26A to 26C, and light receiving element arrays 27A, 27B are mounted by flip chip bonding.

On the other hand, as shown in FIG. 3, a second substrate 40 different from the transparent substrate 10 is prepared, and on the second substrate 40, according to the patterns of the optical waveguides 20A to 20C and 21A to 21D. Then, the polymer type optical waveguide 30 and the like in which the core 30a is wrapped by the cladding layer 30b are formed by using a known photolithography process. Next, on the surface of the second substrate 40 on which the optical waveguide is formed, the light receiving element arrays 26A to 26A-2
A process such as etching is performed on a position that will correspond to each light receiving element included in each of 6C, 27A, and 27B later to form a mirror 30d whose normal line is oriented at 45 degrees. Here, the mirror 30d has a planar shape in the figure, but may have a lens shape or a diffraction grating in order to efficiently input an optical signal from the optical waveguide 30 to each light receiving element.

After forming the necessary electric wiring 40a, the signal control circuit 17, the light emitting element array 23, and the light emitting element array 24 (not shown in FIG. 3) are mounted by flip chip bonding. .

Next, another third substrate 50 is attached to the front side of the second substrate 40 so as to sandwich the optical waveguide 30 inside. Although FIG. 3 does not show the third substrate 50, FIG. 2 shows the third substrate 50 upside down. For convenience of description and illustration, the thickness dimensions of the signal control circuit 17 and the light emitting element array 23 and the second substrate 4
The relationship between 0 and the thickness dimension of the third substrate 50 is much larger than the actual one, so the inner surface of the third substrate 50 must be machined to a deep position. Although there is such an impression, such processing is not actually necessary.

After the third substrate 50 is attached, the second substrate 40 is removed. As a method for removing the second substrate 40, the technology described in the above-mentioned publication can be applied. Briefly, when the second substrate 40 is a transparent substrate and the cladding layer 30b and the like are formed on the surface of the second substrate 40 as shown in FIG. The separation layer, which is a laminate of a light absorption layer made of porous silicon and a reflection layer made of a metal thin film,
Of the cladding 30b or the core 30a on the upper surface of the separation layer directly or via an intermediate layer.
To form Then, after the third substrate 50 is attached as described above, irradiation light such as laser light is irradiated from the back surface side of the second substrate 40 toward the separation layer to cause ablation of the light absorption layer. Then, the second substrate 40 is removed by causing peeling in the separation layer or at the interface.

After the second substrate 40 is removed, the reflection layer is removed by etching or the like, and the light emitting elements corresponding to the light emitting elements included in the light emitting element arrays 23 and 24 are removed from the side where the second substrate 40 is removed. A process such as etching is performed on the position where the mirror 30c is to be formed to form the mirror 30c whose normal line is oriented at 45 degrees. Here, the mirror 30c has a planar shape in the figure, but may have a lens shape or a diffraction grating in order to efficiently input an optical signal into the optical waveguide 30.

Then, as shown in FIG.
A third substrate 50 is attached to the lower surface of the substrate 0 with the optical waveguide 30 and the like inside. Thereafter, a liquid crystal or an organic EL layer is provided according to the type of the display device 1 to form the display unit 14, and the display device 1 is completed.

In the display device 1 having the above configuration, when a data signal, a horizontal synchronization signal, a vertical synchronization signal, and a clock signal are supplied from an external host to the signal control circuit 17, the signal control circuit 17 The clock signal, the horizontal synchronization signal, and the data signal are supplied to the data electrode driving circuits 15A to 15C.
While the clock signal and the vertical synchronizing signal are branched by the number of the address driving circuits 16A and 16B, and the branched signal is transmitted to the light emitting element array 23.
Or after being converted to an optical signal in 24, the optical waveguide 20
A to 20C and the light receiving element arrays 26A to 26C, and supply the data electrode driving circuits 15A to 15C to the optical waveguides 21A to 21D and the light receiving element arrays 27A and 27B.
Is supplied to the address electrode drive circuits 16A and 16B via the.

After the signals are supplied to the data electrode driving circuits 15A to 15C and the address electrode driving circuits 16A and 16B, the address electrodes 12A and 16B are operated in the same manner as in the conventional display device.
Are selected one by one and sequentially driven, and data is sequentially supplied to each data electrode 15 within one cycle of driving the address electrode 12, data is written to each pixel 13, and the written data is Since each pixel 13 emits light or the like in response, an arbitrary image or character is displayed on the display unit 14 of the display device 1.

In the present embodiment, a signal transmission path between the signal control circuit 17 and the data electrode drive circuits 15A to 15C and the address electrode drive circuits 16A and 16B is provided by optical waveguides 20A to 20C and 21A to 21D, the EMI and the data electrode driving circuit 15A
Skew between the address electrode drive circuit 16
The skew between A and 16B is not a problem. Therefore,
The display device 1 having the configuration as in the present embodiment is extremely advantageous for increasing the size and increasing the resolution.

Further, in the present embodiment, since each element is provided using both the front and back surfaces of the transparent substrate 10, both surfaces of the transparent substrate 10 can be effectively utilized.

FIG. 4 is a view showing a second embodiment of the present invention, and is a cross-sectional view of a main part of the display device 1. As shown in FIG. This embodiment is also suitably used for a TFT-type liquid crystal display device, an organic EL display device, and the like, similarly to the first embodiment. In addition, since the planar arrangement relation of each component of the display device 1 is the same as that of FIG. 1 in the first embodiment, the overlapping description will be omitted, and the first embodiment will be described. The same components are denoted by the same reference numerals, and the description thereof will not be repeated.

That is, in this embodiment, different from the first embodiment, each component is provided by using only one surface of the transparent substrate 10. Also, its manufacturing method
The point that the second substrate 40 (not shown) and the third substrate 50 are used is the same as in the first embodiment, and the difference is that the second substrate 40 is used as shown in FIG. When each component is provided thereon, the data electrode drive circuits 15A to 15C, the address electrode drive circuits 16A to 16C, and the light receiving element arrays 26A to 26C, 27A, 27B are also provided by flip chip bonding, and the third substrate 50 is provided. Is attached, and after removing the second substrate 40, both mirrors 30c and 30d are formed.

Even in the configuration of the present embodiment, the first
Similarly to the embodiment, the signal control circuit 17, the data electrode drive circuits 15A to 15C, and the address electrode drive circuit 1
6A and 16B, the signal transmission paths between the optical waveguides 20A to 20A.
20C and 21A-21D, EMI
The skew between the data electrode drive circuits 15A to 15C and the skew between the address electrode drive circuits 16A and 16B do not cause any problem, and are extremely advantageous for increasing the size and increasing the resolution.

FIG. 6 is a view showing a third embodiment of the present invention, and is a cross-sectional view of a main part of the display device 1. As shown in FIG. In the present embodiment, the display unit 14 shown in FIG.
An example of a liquid crystal display device of an (ilmDiode) type will be described. In addition, since the planar arrangement relationship of each component of the display device 1 is the same as that of FIG. 1 in the first embodiment, the overlapping description will be omitted, and the first embodiment will be described.
The same components as those of the second to third embodiments are denoted by the same reference numerals, and the description thereof will not be repeated. In FIG. 6, the display unit 14 is schematically configured such that a transparent substrate 60 and a substrate 10 are arranged to face each other at a predetermined interval, and a liquid crystal unit 62 (details are omitted) is formed between them. On the transparent substrate 60, a color filter (not shown), a data electrode 11, and a protective film 61 are formed. The TF included in the pixel 13 is provided on the substrate 10.
A D (thin film diode) element 13a, a pixel electrode 13b, an address electrode 12, and a protective film 63 are formed.

The difference from the second embodiment is that the data electrode 11 and the data electrode drive circuit 15A are connected to the tape wiring 64 because the data electrode 11 is formed not on the substrate 10 but on another transparent substrate 60. It is a point connected by.

Although the connection between the address electrode 12 and the address electrode drive circuit 16 is not shown in FIG. 6, it is the same as that in the second embodiment, and the description is omitted.

The data electrode driving circuits 15A to 15C are circuits for controlling the potential of the data electrode 11 connected via the tape wiring 64.
6A and 16B are circuits for driving the TFD element 13a connected via the address electrode 12. That is, when the TFD element 13a connected to an arbitrary address electrode 12 is driven by the address electrode drive circuits 16A and 16B, the pixel electrode 13b connected to the TFD element 13a and the data electrode 11 are brought into a conductive state. The liquid crystal of the pixel 13 is switched to a display state, a non-display state, or an intermediate state according to the potential of the data electrode 11.

FIG. 7 is a view showing a fourth embodiment of the present invention, and is a cross-sectional view of a main part of the display device 1. As shown in FIG. In the present embodiment, a case where the display unit 14 in FIG. 1 is a plasma display will be described as an example. In addition, since the planar arrangement relationship of each component of the display device 1 is the same as that of FIG. 1 in the first embodiment, the overlapping description will be omitted, and the first to third embodiments will be omitted. The same reference numerals are given to the same configurations as those of the embodiment, and the overlapping description will be omitted.

In FIG. 7, the display section 14 is roughly composed of a transparent substrate 70 and a substrate 10 which are arranged to face each other, and a discharge section 72 formed between them. On the transparent substrate 70, a display electrode 71, a dielectric film 72, and a protective film 73 are formed. An address electrode 78 is formed on the substrate 10. A partition 13d for forming a discharge chamber 13c filled with a rare gas is formed in the discharge section 74, and a phosphor 13e is formed inside the partition 13d.

In this embodiment, as in the third embodiment, since the display electrode 71 is formed on the transparent substrate 70, the display electrode 71 and the display electrode driving circuit (the data electrode in FIG. 1) Drive circuit) 15A is tape wiring 6
4 are connected.

Although the connection between the address electrode 12 and the address electrode drive circuit 16 is not shown in FIG. 7, it is the same as in the second embodiment, and the description is omitted.

When a voltage is applied between the address electrode 12 and the display electrode 71, a discharge (surface discharge) occurs in the discharge chamber 13c to generate ultraviolet rays, and the ultraviolet rays are irradiated on the phosphor 13e to cause the pixels 13 to emit light. I do.

FIG. 5 is a diagram showing a fifth embodiment of the present invention. FIG. 5 (a) is a circuit diagram showing the internal configuration of a signal control circuit 17, and FIG. 5 (b) is a data electrode driving circuit. Circuit 15A
It is a circuit diagram which shows the internal structure of ~ 15C. The other configuration is the same as that of the above-described first or second embodiment, and the illustration and description thereof are omitted.

That is, in this embodiment, as an interface between the external host and the display device 1, TMDS (Transition), which is an example of a digital monitor interface, is used.
Minimized Differential Signaling) is used.

In the TMDS, a signal supplied from an external host is a signal of a total of four channels including a serial image signal of three channels (R, G, B) and a clock (CLK) signal of one channel. The signal control circuit 17 has receiving circuits 60,..., 60 corresponding to the signals of the four channels, and each light emitting element 23a in the light emitting element array 23 according to the output of the receiving circuit 60.
, 61, which drive the light emitting element. Further, the signal control circuit 17 includes a vertical synchronization signal generation circuit 62 that generates a vertical synchronization signal in accordance with an output corresponding to some of the channels (B, CLK) among the outputs of the reception circuit 60, A light emitting element driving circuit 63 for driving each light emitting element 24a in the light emitting element array 24 according to the output of the generating circuit 62.

On the other hand, data electrode drive circuits 15A to 15C
., 70 to which the output of each light receiving element 26a in the light receiving element array 26A is supplied, a decoding circuit 71 which converts serial data into parallel data and then decodes the data, and a decoding circuit 71 A drive circuit 72 that drives the data electrodes according to the decoding result, and a PLL circuit 73 that performs phase matching control on each of the decode circuits 71 and the drive circuit 72 according to the output of the amplifier circuit 70 that receives the clock signal. I have.

Then, each light emitting element 23a of the light emitting element array 23 and each light receiving element 26a of the light receiving element array 26A are connected to the same optical waveguide 2 as in the first or second embodiment.
Although the optical waveguide 20A is coupled via OA, the number of bits of the optical waveguide 20A is only four bits of R, G, B, and CLK. That is, according to the configuration of the present embodiment, in addition to the effects of the first and second embodiments, since the digital monitor interface is further employed, the optical waveguide 2
There is an advantage that the number of bits of each of 0A to 20C can be significantly reduced, and image quality degradation during transmission is prevented.

[0066]

As described above, according to the present invention,
Since the signal transmission path between the signal control circuit 17, the data electrode driving circuit, and the address electrode driving circuit is constituted by an optical transmission path, EMI, skew between the data electrode driving circuits,
The skew between the address electrode driving circuits does not cause any problem, so that there is an effect that it is extremely advantageous for increasing the size of the display device and increasing the resolution.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating a configuration of a display device according to a first embodiment.

FIG. 2 is a cross-sectional view of a main part of the display device according to the first embodiment.

FIG. 3 is a cross-sectional view illustrating a method for manufacturing the display device in the first embodiment.

FIG. 4 is a sectional view of a main part of a display device according to a second embodiment.

FIG. 5 is a circuit diagram illustrating a fifth embodiment.

FIG. 6 is a sectional view of a main part of a display device according to a third embodiment.

FIG. 7 is a sectional view of a main part of a display device according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display apparatus 10 Transparent substrate 11 Data electrode 12 Address electrode 13 Pixel 14 Display part 15A-15C Data electrode drive circuit 16A, 16B Address electrode drive circuit 17 Signal control circuit 20A-20C Optical waveguide 21A-21D Optical waveguide 23, 24 Light emitting element Array 26A to 26C Light receiving element array 27A, 27B Light receiving element array 30 Optical waveguide 30c, 30d Mirror

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 3/20 633 G09G 3/20 633K 633Z 680 680G (72) Inventor Atsushi Harada 3-chome Yamato, Suwa-shi, Nagano Prefecture No. 3-5 Seiko Epson Corporation F term (reference) 2H093 NA16 NC13 NC15 NC16 NC34 NC49 NE06 NE07 NE10 5C006 AA28 AF63 BB11 BC03 BC11 BC20 BF39 BF49 BF50 FA11 FA32 FA37 FA42 5C080 AA06 AA10 BB05 CC06 DD07 DD08 JJ03 JJ03 AA01 BB05 BB12 CC09 EE31 EE37 KK05

Claims (5)

[Claims] 1. A display unit having pixels arranged at intersections of data electrodes and address electrodes wired in a grid, and a data electrode driving circuit for driving the data electrodes;
An address electrode driving circuit that drives the address electrodes;
A signal control circuit that generates a signal necessary to drive the data electrode drive circuit and the address electrode drive circuit and supplies the signal to the data electrode drive circuit and the address electrode drive circuit; A signal transmission path for transmitting a signal between the circuit and the address electrode drive circuit, wherein the signal transmission path is an optical transmission path capable of transmitting an optical signal, and the signal control is performed. Between the circuit and the signal transmission line, a light emitting element for converting an electric signal to an optical signal is provided,
A display device, comprising: a light receiving element that converts an optical signal into an electric signal is provided between the signal transmission path and the data electrode driving circuit and the address electrode driving circuit. 2. The same substrate is provided with the display section, the data electrode drive circuit, the address electrode drive circuit, the signal control circuit, the signal transmission path, the light emitting element, and the light receiving element. Display device. 3. The display section, the data electrode drive circuit, the address electrode drive circuit and the light receiving element are provided on one surface of a transparent substrate, and the signal control circuit is provided on the other surface of the transparent substrate. The light transmission device according to claim 1, wherein the signal transmission path and the light emitting element are provided, and the optical signal transmitted through the signal transmission path propagates between the front and back surfaces of the transparent substrate and is incident on the light receiving element. Display device. 4. On one surface of a first substrate which is transparent,
While a display portion having pixels arranged at intersections of data electrodes and address electrodes wired in a lattice is provided, a polymer optical waveguide is formed on a second substrate, and the polymer optical waveguide is formed. A data electrode driving circuit for driving the data electrode, an address electrode driving circuit for driving the address electrode, a light receiving element having a signal output side connected to a signal input side of the data electrode driving circuit, and a signal A light receiving element whose output side is connected to a signal input side of the address electrode driving circuit, a signal control circuit that generates and outputs signals necessary for driving the data electrode driving circuit and the address electrode driving circuit, A light emitting element that converts an electric signal generated by the signal control circuit into an optical signal and enters the polymer optical waveguide, and then sandwiches the polymer optical waveguide. As described above, a third substrate is attached to the second substrate, and the second substrate is removed from the polymer-type optical waveguide, and light emitted from the light-emitting element is supplied to the polymer-type optical waveguide. After forming a mirror for incidence on the polymer type optical waveguide and a mirror for incidence on the light receiving element, on the other surface of the first substrate, with the polymer type optical waveguide inside. A method for manufacturing a display device, comprising attaching the third substrate. 5. On one surface of a first substrate that is transparent,
A display section in which pixels are arranged corresponding to respective intersections of data electrodes and address electrodes wired in a grid, a data electrode drive circuit for driving the data electrodes, and an address electrode drive for driving the address electrodes A circuit, a light receiving element having a signal output side connected to the signal input side of the data electrode driving circuit, and a light receiving element having a signal output side connected to the signal input side of the address electrode driving circuit. Forming a polymer type optical waveguide on a substrate, forming a mirror for incidence on the light receiving element in the polymer type optical waveguide, and further driving the data electrode driving circuit and the address electrode driving circuit. A signal control circuit that generates and outputs a necessary signal, and a light emitting element that converts the electric signal generated by the signal control circuit into an optical signal and enters the polymer optical waveguide. Are provided on the second substrate so as to sandwich the polymer optical waveguide.
After attaching the substrate, and removing the second substrate from the polymer-type optical waveguide, after forming a mirror for incidence of light emitted from the light-emitting element to the polymer-type optical waveguide, A method of manufacturing a display device, comprising: attaching the third substrate to the other surface of the first substrate with the polymer-type optical waveguide inside.