JP2003029722A - Active matrix type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the wiring capacity of a region which is located in other than a display panel thereby to reduce the increase of the area of a circuit which drives the panel. SOLUTION: A transmitting side circuit 13 and signal side receiving circuits 16 of a signal driver circuit 15 and scannning side receiving circuits 18 of a scanning driver circuit 17 are connected through transmission lines 14. The circuit 13 transmits modulated signals, which are modulated employing any one of the communication systems including a PSK system, an FEK system, an ASK system, a pulse code modulation system and a CDMA system, to the circuits 16 or 18 based on image data from the external. Accordingly for the lines 14, only one line for each of the circuit 16 side and the circuit 18 side is enough, and the wiring capacity of the region other than a liquid crystal panel 11 can be reduced. Therefore, the area required for the circuits 13, 14, 16 and 18 that drive the panel 11 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active matrix display device, and more particularly to an active matrix display device that uses a modulated signal for transmitting information to each scanning line and each signal line.

[0002]

2. Description of the Related Art Conventionally, a liquid crystal display device, which is one form of an active matrix display device, has a structure as shown in FIG. In FIG. 9, 1 is a liquid crystal panel, 2 is a signal driver circuit, 3 is a scanning driver circuit, 4 is a signal line, and 5 is a scanning line. The signal driver circuit 2 and the scan driver circuit 3 drive the liquid crystal panel 1 by applying an appropriate voltage to each signal line of the signal line 4 and each scan line of the scan line 5.

[0003]

However, the above-mentioned conventional liquid crystal display device has the following problems.
That is, the number of the signal lines 4 and the scanning lines 5 is regulated by the number of pixels of the liquid crystal panel 1, and the number of the pixels is increasing due to the high definition of the liquid crystal display device in recent years.
It is becoming finer. Therefore, the wiring capacitance of each signal line of the signal line 4 and each scanning line of the scanning line 5 is increasing. As a result, the drive current required to drive each signal line and each scan line increases, and the element must be enlarged to obtain a large drive current. Therefore, the signal driver circuit 2 that drives the liquid crystal panel 1 and There is a problem that the area of the scan driver circuit 3 becomes large.

Therefore, an object of the present invention is to provide an active matrix type display device which can reduce the wiring capacitance in a region other than the display panel and can alleviate an increase in the area of a circuit for driving the display panel.

[0005]

To achieve the above object, a first invention is to provide a plurality of signal lines arranged in one direction and a plurality of scanning lines arranged in another direction different from the one direction. And driving a display panel including pixels arranged in a matrix near the intersections of the signal lines and the scanning lines and connected to the signal lines and the scanning lines to display the pixels. In matrix type display device,
A display section drive circuit including a transmission circuit that transmits a signal modulated based on information for driving the display panel, and connected to each of the scanning lines, and receives and demodulates the modulated signal, A scanning side receiving circuit for generating a voltage for selecting the pixel, and a voltage for displaying the selected pixel, which is connected to each of the signal lines and receives the demodulated signal and demodulates it. Is connected to each of the signal side receiving circuit, the transmitting circuit, each signal side receiving circuit, and each scanning side receiving circuit, and the modulated signal from the transmitting circuit is connected to each of the signal side receiving circuits and It is characterized in that a transmission means for transmitting to each scanning side reception circuit is provided.

According to the above structure, a signal modulated based on the information for driving the display panel is transmitted from the transmission circuit of the display section drive circuit to the signal side reception circuit and the scanning side reception circuit via the transmission means. Sent. The modulated signal thus transmitted is received and demodulated by each of the signal side receiving circuits and each of the scanning side receiving circuits, and each of the scanning side receiving circuits generates a voltage for selecting the pixel. On the other hand, a voltage for displaying the selected pixel is generated from each signal side receiving circuit.

In this case, since the transmission line transmits the modulated signal, it is not necessary to divide the transmission line for each signal line and scanning line of the display panel, and the transmission circuit, the signal side reception circuit, and It suffices that the scanning side receiving circuit is connected by at least one transmission line. Therefore, the wiring other than the display panel is significantly simplified, and the wiring capacitance is reduced. Therefore, the current for driving the display panel is reduced, and the area of each circuit for driving the display panel including the area required for wiring is reduced.

Further, the amplitude (voltage) of the modulated signal propagating through the transmission line is extremely smaller than the voltage applied to the signal line or the scanning line. Therefore, the power for transmitting the modulated signal becomes sufficiently small,
The power consumption of the circuit that drives the display panel is reduced.

In one embodiment, in the active matrix type display device of the first invention, two signal side receiving circuits are connected to each signal line, and the scanning side receiving circuit is connected to each of the above. Two are connected per scanning line.

According to this embodiment, two signal-side receiving circuits or two scanning-side receiving circuits are connected to each signal line and each scanning line. Therefore, when one of the receiving circuits becomes defective, the other receiving circuit as a spare is used. In this way, the yield of the active matrix display device is significantly improved.

In one embodiment, in the active matrix type display device of the first invention, at least one of the signal side receiving circuit and the scanning side receiving circuit is formed on a spherical semiconductor substrate. In addition, it is mounted on the substrate of the display panel.

According to this embodiment, since the spherical semiconductor substrate on which at least one of the signal side receiving circuit and the scanning side receiving circuit is formed is mounted on the display panel substrate, so-called bare chips are mounted. It becomes possible to do. Therefore, the mounting process becomes easier as compared with the case of mounting a flat semiconductor substrate.

Further, in one embodiment, in the active matrix display device of the first aspect of the present invention, a recognition code is assigned to each of the signal side receiving circuits and the scanning side receiving circuits, and the modulated signals are modulated. The signal is modulated by any one of the phase displacement modulation method, frequency displacement modulation method, amplitude displacement modulation method, and pulse code modulation method, and the identification code assigned to the receiving circuit of the destination is incorporated. Signal.

According to this embodiment, the phase displacement modulation method,
By using any one of the frequency displacement modulation method, the amplitude displacement modulation method, and the pulse code modulation method, the transmission circuit, the signal side receiving circuits, and the scanning side receiving circuits are relatively easily configured. To be done. Further, since a recognition code is assigned to each of the signal side receiving circuit and each of the scanning side receiving circuits, and a recognition code of the transmission destination is incorporated in the modulated signal, it is easy to perform a specific signal side receiving circuit or scanning. Information is transmitted to the side receiving circuit.

In one embodiment, in the active matrix type display device of the first aspect of the invention, spreading codes are assigned to the signal side receiving circuits and the scanning side receiving circuits, respectively, and modulated. The signal is a signal that has been spread and modulated by a code division multiple access method using a spreading code assigned to the receiving circuit of the transmission destination.

According to this embodiment, the noise immunity performance is improved by using the code division multiple access system. Further, since a spreading code is assigned to each of the signal side receiving circuit and each scanning side receiving circuit, and a signal that is spread and modulated using the spreading code assigned to the receiving circuit of the transmission destination is transmitted, A signal that can be demodulated by only the signal side receiving circuit or the scanning side receiving circuit is transmitted.

In one embodiment, in the active matrix type display device of the first invention, the recognition code or the spread code is the display section drive circuit, each signal side receiving circuit and each scanning side receiving circuit. , And the stored recognition code or spreading code is rewritable from the outside.

According to this embodiment, the recognition code or the spread code is assigned to the signal side receiving circuit and the scanning side receiving circuit, which are manufactured as the same type, after they are mounted on the substrate of the display panel. It becomes possible to operate as a specific signal side receiving circuit and a scanning side receiving circuit. Further, the display section drive circuits manufactured as the same type can be used for other display panels having different numbers of pixels. In this way, the display drive circuit, the signal side receiving circuit, and the scanning side receiving circuit can be commonly used in display devices of different types, and the development cost can be suppressed.

Further, in one embodiment, in the active matrix type display device of the first invention, the transmitting means is an antenna, and the transmitted signal is a modulated electromagnetic wave signal.

According to this embodiment, since the modulated electromagnetic wave signal is transmitted via the antenna, the transmission line is unnecessary. Therefore, the wiring capacity is further reduced by further simplifying the wiring in the area other than the display panel. In this way, the power required to charge and discharge the wiring capacitance is further reduced, and the power consumption is further reduced.

Further, in one embodiment, in the active matrix type display device of the first invention, the antenna is capable of collecting electric current by irradiating an electromagnetic wave from the outside. The receiving circuit and each scanning side receiving circuit are operated by the electric power collected by the antenna.

According to this embodiment, since the signal-side receiving circuits and the scanning-side receiving circuits operate by the electric power collected by the antenna, the power supply line and the ground line are not required and further wiring is possible. It is simplified.

The second aspect of the invention is to provide a plurality of signal lines arranged in one direction, a plurality of scanning lines arranged in another direction different from the one direction, the signal lines and the scanning lines. In the active matrix type display device which displays the pixels by driving the display panel including the pixels which are arranged in a matrix in the vicinity of the intersection position of the pixels and which are connected to the signal line and the scanning line, A part driving circuit, a scanning side transmitting / receiving circuit connected to each scanning line, a signal side transmitting / receiving circuit connected to each signal line, the transmitting / receiving circuit, each scanning side transmitting / receiving circuit, and each signal side transmitting / receiving circuit The transmission / reception circuit is provided with a transmission means connected to each of them, and the transmission / reception circuit has a function of transmitting a signal modulated based on the information for driving the display panel, and the transmission / reception circuit of each signal side and the transmission / reception circuit of each scanning side. Strange And a function of receiving the demodulated signal and demodulating, each scanning side transmitting / receiving circuit receives the demodulated signal and demodulates it, and a function of generating a voltage for selecting the pixel, It has a function of transmitting a signal modulated based on information different from the driving information of the display panel, each signal side transmission / reception circuit receives the demodulated signal and demodulates the selected pixel. It has a function of generating a voltage for displaying and a function of transmitting a signal modulated based on information different from the driving information of the display panel, and the transmitting means is the modulated signal from the transmitting / receiving circuit. While transmitting signals to the signal side transmitting / receiving circuits and the scanning side transmitting / receiving circuits, the modulated signals from the signal side transmitting / receiving circuits or the scanning side transmitting / receiving circuits are transmitted to the transmitting / receiving circuit. To be It is characterized.

According to the above structure, similarly to the active matrix display device of the first invention, the wiring other than the display panel is simplified and the wiring capacitance is reduced, and each circuit for driving the display panel is reduced. Area and power consumption are reduced. Further, since the transmission / reception circuit, each signal side transmission / reception circuit, and each scanning side transmission / reception circuit can communicate with each other, the active matrix type display device can be provided with more advanced functions.

In one embodiment, in the active matrix type display device of the second invention, two signal side transmitting / receiving circuits are connected to each of the signal lines.
Two scanning side transmitting / receiving circuits are connected to each scanning line.

According to this embodiment, two signal side transmitting / receiving circuits or two scanning side transmitting / receiving circuits are connected to each signal line and each scanning line. Therefore, if one of the transmitting / receiving circuits becomes defective, the other transmitting / receiving circuit as a spare is used. In this way, the yield of the active matrix display device is significantly improved.

In one embodiment, in the active matrix display device of the second invention, at least one of the signal side transmission / reception circuit and the scanning side transmission / reception circuit is formed on a spherical semiconductor substrate. In addition, it is mounted on the substrate of the display panel.

According to this embodiment, since the spherical semiconductor substrate on which at least one of the signal side transmitting / receiving circuit and the scanning side transmitting / receiving circuit is formed is mounted on the substrate of the display panel, a so-called bare chip is mounted. It becomes possible to do. Therefore, the mounting process becomes easier as compared with the case of mounting a flat semiconductor substrate.

Further, in one embodiment, in the active matrix type display device of the second invention, a recognition code is assigned to each of the transmitting / receiving circuit, each signal side transmitting / receiving circuit and each scanning side transmitting / receiving circuit. The modulated signal is modulated by any one of the phase displacement modulation method, the frequency displacement modulation method, the amplitude displacement modulation method, and the pulse code modulation method, and is recognized by the transmission / reception circuit of the transmission destination. It is a signal with a code incorporated.

According to this embodiment, the phase displacement modulation method,
By using any one of the frequency displacement modulation method, the amplitude displacement modulation method, and the pulse code modulation method, the transmission / reception circuit of the display section drive circuit, each signal side transmission / reception circuit, and each scanning side transmission / reception circuit are It is relatively easy to configure. Further, the transmission / reception circuit, each signal-side transmission / reception circuit and each scanning-side transmission / reception circuit are respectively assigned a recognition code, and since the recognition code of the transmission destination is incorporated in the modulated signal, a specific transmission / reception circuit, Information is transmitted to the signal side transmitting / receiving circuit or the scanning side transmitting / receiving circuit.

In one embodiment, in the active matrix type display device of the second invention, spreading codes are assigned to the transmitting / receiving circuits, the signal side transmitting / receiving circuits and the scanning side transmitting / receiving circuits, respectively. The modulated signal is a signal that has been spread and modulated by a code division multiple access method using a spreading code assigned to the transmission / reception circuit of the transmission destination.

According to this embodiment, the noise immunity performance is improved by using the code division multiple access system. Further, a spread code is assigned to each of the transmission / reception circuit of the display section drive circuit, each signal side transmission / reception circuit and each scanning side transmission / reception circuit, and a signal spread-modulated using the spread code assigned to the transmission / reception circuit of the transmission destination Is transmitted, a signal that can be demodulated by only a specific transmitting / receiving circuit, a signal side transmitting / receiving circuit, or a scanning side transmitting / receiving circuit is transmitted.

In one embodiment, in the active matrix type display device of the second invention, the recognition code or the spread code is the display section drive circuit, the signal side transmission / reception circuits and the scanning side transmission / reception circuits. , And the stored recognition code or spreading code is rewritable from the outside.

According to this embodiment, the recognition code or the spread code is assigned to the signal side transmission / reception circuit and the scanning side transmission / reception circuit manufactured as the same type after they are mounted on the substrate of the display panel. It becomes possible to operate as a specific signal side transmission / reception circuit and a scanning side transmission / reception circuit. Further, the display section drive circuits manufactured as the same type can be used for display panels having different numbers of pixels. Thus, the display drive circuit,
The signal side transmission / reception circuit and the scanning side transmission / reception circuit can be commonly used in display devices of different types, and development costs can be suppressed.

Further, in one embodiment, in the active matrix type display device of the second invention, the transmitting means is an antenna, and the transmitted signal is a modulated electromagnetic wave signal.

According to this embodiment, since the modulated electromagnetic wave signal is transmitted through the antenna, the transmission line is unnecessary. Therefore, the wiring capacity is further reduced by further simplifying the wiring in the area other than the display panel. In this way, the power required to charge and discharge the wiring capacitance is further reduced, and the power consumption is further reduced.

Further, in one embodiment, in the active matrix type display device of the second invention, the antenna is capable of collecting current by irradiating an electromagnetic wave from the outside. The transmission / reception circuit and each scanning side transmission / reception circuit are operated by the electric power collected by the antenna.

According to this embodiment, since the signal side transmission / reception circuits and the scanning side transmission / reception circuits operate by the electric power collected by the antenna, the power supply line and the ground line are not required and further wiring is possible. It is simplified.

Further, in one embodiment, in the active matrix type display device of the first invention or the second invention, the display section drive circuit performs the modulated signal for randomly accessing each pixel. To send.

According to this embodiment, when displaying a changing character or figure on the background image that does not change, the display drive circuit accesses only the required pixels of the character or figure. Thus, the frequency of the modulated signal transmitted by the transmission means is reduced. Alternatively, the percentage of time to stop the modulated signal is increased. Therefore, it is possible to further reduce the power consumption.

Further, in one embodiment, in the active matrix type display device of the first invention or the second invention, the display panel is a liquid crystal display panel or an organic electroluminescence display panel.

According to this embodiment, when a liquid crystal display panel is used as the display panel, a high-definition display with low power consumption is performed. On the other hand, when an organic electroluminescence display panel that emits light by itself is used, display with high brightness and a wide viewing angle is performed.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. In the following embodiments, a liquid crystal display device will be described as an example of an active matrix type display device. However, the present invention is not limited to the liquid crystal display device, and the organic EL (Electro Lumines
cence) and other active matrix display devices.

<First Embodiment> FIG. 1 is a circuit diagram of a liquid crystal display device as an example of an active matrix type display device of the present embodiment. The circuit for driving the liquid crystal of each pixel 12 in the liquid crystal panel 11 is the transmission side circuit 1
3, a transmission line 14, a signal side receiving circuit 16 forming a signal driver circuit 15, and a scanning side receiving circuit 18 forming a scanning driver circuit 17.

A signal side receiving circuit 16 and a scanning side receiving circuit 18 are connected to the transmitting side circuit 13 via a transmission line 14. In FIG. 1, the transmission line 14 is common to the signal side receiving circuit 16 and the scanning side receiving circuit 18, but of course, it may be provided separately. If necessary, a plurality of transmission lines 14 may be provided to distribute the communication. When a plurality of transmission lines 14 are provided, the transmission speed of each transmission line 14 can be reduced.

A signal line 19 is connected to the signal side receiving circuit 16 and a scanning line 20 is connected to the scanning side receiving circuit 18. The TFTs (thin film transistors) 21 forming the pixels 12 are arranged in a matrix at intersections of the signal lines 19 and the scanning lines 20. The gate electrode is connected to the scanning line 20, and either the source region or the drain region is connected to the signal line 19. Further, the other one of the source region and the drain region of the TFT 21 is connected to the pixel electrode 22. The transmission side circuit 13 receives image data from the outside and transmits a signal modulated based on this image data (hereinafter referred to as a modulation signal) to the signal side reception circuit 16 or the scanning side reception circuit 18. Then, the signal side receiving circuit 16 or the scanning side receiving circuit 18 outputs the display voltage or the selection voltage to the corresponding signal line 19 or scanning line 20 based on the data sent by the modulation signal.

By the way, as a communication system between the transmitting side circuit 13 and the signal side receiving circuit 16 or the scanning side receiving circuit 18, for example, a PSK (Phase Shift Keying) system or an FSK (Frequency Shift) system is used. Keying:
Frequency displacement modulation) method and ASK (Amplitude Shift Keyi)
ng: amplitude displacement modulation) method or pulse code modulation method can be used. Furthermore, as another communication method, CDMA (Code Division Multiple Access), which is a multiplex transmission method, is used.
s: code division multiple access) method can be used.

As the communication system, the above-mentioned PSK system, FSK
When the system, the ASK system, and the pulse code modulation system are used, a recognition code is assigned to each signal side reception circuit 16 and each scanning side reception circuit 18, and the transmission side circuit 1
The identification code of the signal-side receiving circuit 16 or the scanning-side receiving circuit 18, which is the destination of the modulated signal, is incorporated in the modulated signal transmitted from No. 3. In this way, each signal side receiving circuit 16 and each scanning side receiving circuit 18 reads the recognition code incorporated in the received modulation signal to determine whether or not it is the modulation signal for itself, and the modulation signal for itself. It will be possible to process only. When any of the above PSK system, FSK system, ASK system and pulse code modulation system is used as the communication system, the transmitting side circuit 13, the signal side receiving circuit 16 and the scanning side receiving circuit 18 have a relatively simple structure. Can be

When the CDMA system is used as the communication system, a spread code is assigned to each signal side reception circuit 16 and each scanning side reception circuit 18, and the transmission side circuit 13 uses the spread code for the signal. It is transmitted after being spread-modulated and converted into a wideband modulated signal. Then, in each signal side receiving circuit 16 or each scanning side receiving circuit 18, the received wide band modulated signal is despread using the spreading code used at the time of transmission to obtain the original signal. That is, the transmission side circuit 13
If spreading modulation is performed using the spreading code for reception of the specific receiving circuit in each signal side receiving circuit 16 and each scanning side receiving circuit 18, the signal can be transmitted only for the above specific receiving times. When the above CDMA system is used as the communication system, the noise resistance performance can be improved.

The transmitting side circuit 13 and the signal side receiving circuit 16
And the scanning side receiving circuit 18 is provided with the TFT 2 on the glass substrate.
It can be formed at the same time as 1, or a chip cut out from a wafer by dicing can be mounted on a glass substrate. For example, the transmitter circuit 13 and the signal receiver circuit 1
6 and the scanning side receiving circuit 18 are formed on different wafers respectively, and the inspected chips cut out by dicing are mounted on the glass substrate, the circuit scale of the respective circuits is the signal driver circuit 15 and the scanning driver circuit 17 Since it is very small compared to the whole, the yield can be greatly improved.

Furthermore, if the identification code (spread code in the case of the CDMA system) stored in each of the receiving circuits 16 and 18 is programmable from the outside, the receiving circuits of the same type can be operated at the manufacturing stage. At the stage, it can be operated as a specific scanning side (signal side) receiving circuit.

If the identification code (spread code in the case of the CDMA system) of each of the receiving circuits 16 and 18 stored in the transmitting side circuit 13 is programmable from the outside, the same kind of product can be produced at the manufacturing stage. It is possible to use a certain transmitter circuit in a liquid crystal display device having a different number of pixels. In this case, the number of receiving circuits may be changed according to the number of pixels on the receiving circuit side.

In the liquid crystal display device shown in FIG. 1, since the modulation signal is transmitted through the transmission line 14, the liquid crystal panel 1
It is sufficient that at least one transmission line 14 exists between the signal side receiving circuit 16 and the scanning side receiving circuit 18 adjacent to 1. Therefore, the wiring in the area other than the liquid crystal panel 11 can be significantly simplified and the wiring capacitance can be reduced. Therefore, the current for driving each signal line 19 and the scanning line 20 can be small, so that the size of the element is reduced, and the transmission side circuit 13, the transmission line 14, the signal side reception circuit 16 and the scanning circuit for driving the liquid crystal panel 11 are reduced. The area of the side receiving circuit 18 can be reduced. Furthermore, the area required for the wiring itself can be reduced. Therefore, the liquid crystal panel 1
Therefore, it is possible to alleviate the problem of an increase in the area of the transmission side circuit 13, the transmission line 14, the signal side reception circuit 16 and the scanning side reception circuit 18 that drive the No.

Here, the power consumed by the electrostatic capacitance associated with the wiring outside the liquid crystal panel 11 will be roughly estimated. In the conventional liquid crystal display device, the sum of the number of scanning lines and the number of signal lines is N, and the capacitance per wiring is C ₁ , T
When the voltage applied to the FT is V ₁ and the average of the number of times the voltage applied to the scanning line (signal line) changes per unit time is R, the consumed power P ₁ is P ₁ = NC ₁ V ₁ ² R Become.

On the other hand, in the case of the liquid crystal display device according to the present embodiment shown in FIG. 1, for example, when the above CDMA system is used, the sum of the number of signal lines 19 and the number of scanning lines 20 is N, When the capacity of the transmission line 14 is C ₂ , the amplitude of the modulation signal is V ₂ , and the average of the number of times the voltage applied to the scanning line (signal line) changes per unit time is R, the power P consumed by the transmission line 14 is P.
₂ becomes P ₂ = NC ₂ V ₂ ² R. Here, it is assumed that the frequency of the modulated signal is about NR.

Generally, the voltage V ₁ applied to the TFT is
Is about 10V, but the amplitude V _{2 of the} modulation signal is 0.03V
The degree is enough. In addition, basically, a single transmission line 14 is sufficient.
C ₂ is much smaller than the wiring capacitance C ₁ in the conventional liquid crystal driver in which the wiring is dense. Therefore, the power consumption P ₂ due to the capacitance associated with the wiring outside the liquid crystal panel 11 in the liquid crystal display device of the present embodiment shown in FIG. 1 is much higher than the power consumption P _{1 associated} with the wiring capacitance of the conventional liquid crystal driver. It gets smaller.

The transmission side circuit 13, the transmission line 14, the signal side reception circuit 16 and the scanning side reception circuit 18 for driving the liquid crystal panel 11 can also randomly access each pixel 12 of the liquid crystal panel 11. Thus, if each pixel 12 of the liquid crystal panel 11 can be randomly accessed, it is effective, for example, when a character or a figure is displayed on a background image that does not change and only this character or the figure changes.
That is, by accessing only the pixels 12 corresponding to the characters or figures, the amount of signals transmitted through the transmission line 14 can be reduced. Therefore, the transmission line 14
Can reduce the frequency of the transmitted signal,
Alternatively, since it is possible to increase the ratio of the time when no signal is transmitted, it is possible to further reduce the power consumption of the liquid crystal display device.

As described above, in the liquid crystal display device of the present embodiment, the transmission side circuit 13 which receives image data from the outside and transmits it to the signal driver circuit 15 and the scan driver circuit 17, and the signal of the signal driver circuit 15. The side receiving circuit 16 and the scan side receiving circuit 18 of the scan driver circuit 17 are connected via a transmission line 14. Then, the transmission side circuit 13 outputs a modulation signal, which is modulated based on the image data received from the outside, by any one of the communication methods of the PSK method, the FSK method, the ASK method, the pulse code modulation method, and the CDMA method. Side receiving circuit 1
6 or the scanning side receiving circuit 18 is transmitted.

Therefore, at least one transmission line 14 is required from the transmission side circuit 13 to the signal side reception circuit 16 and the scanning side reception circuit 18, and wiring in the area other than the liquid crystal panel 11 is remarkably simplified. Wiring capacitance can be reduced. Therefore, each signal line 19 and scanning line 2
Since the current for driving 0 is small, the liquid crystal panel 1
It is possible to reduce the area of the transmission side circuit 13, the transmission line 14, the signal side reception circuit 16 and the scanning side reception circuit 18 that drive the drive circuit 1.

Further, the power required to charge and discharge the wiring capacity is reduced, and the liquid crystal display device of the present invention can be made low in power consumption. Furthermore, if the recognition code (spread code) of the signal side receiving circuit 16 and the scanning side receiving circuit 18 can be rewritten from the outside, the signal side receiving circuit 16 and the scanning side receiving circuit 18 are common to different types of liquid crystal display devices. It is possible to reduce the development cost.

<Second Embodiment> In the present embodiment, in the liquid crystal display device of the first embodiment, a signal side receiving circuit and a scanning side receiving circuit are connected to both ends of each signal line and each scanning line. Regarding what you did.

FIG. 2 is a circuit diagram of the liquid crystal display device according to this embodiment. Liquid crystal panel 31, pixel 32, transmission side circuit 33, transmission line 34, first signal driver circuit 35, first signal side receiving circuit 36, first scanning driver circuit 37, first scanning side receiving circuit 38, signal line 39, The scanning line 40, the TFT 41, and the pixel electrode 42 are the same as those in the first embodiment shown in FIG.
, The liquid crystal panel 11, the pixels 12, the transmitting side circuit 13, the transmission line 14, the signal driver circuit 15, the signal side receiving circuit 16, the scanning driver circuit 17, the scanning side receiving circuit 18, the signal line 19,
It is the same as the scanning line 20, the TFT 21, and the pixel electrode 22.

In the present embodiment, each of the signal lines 3
A second signal driver circuit 43 is also formed on the other end of the second signal driver circuit 43.
The signal side receiving circuit 44 is connected. Further, the second scanning side receiving circuit 46 forming the second scanning driver circuit 45 is also connected to the other end of each scanning line 40. Further, the second signal side reception circuit 44 and the transmission side circuit 33, and the second scanning side reception circuit 46 and the transmission side circuit 33 are also connected by a transmission line 34. In this way, two reception circuits are connected to each signal line 39 and each scanning line 40.
Therefore, even if the receiving circuit connected to one end of each signal line 39 and each scanning line 40 becomes defective, the other receiving circuit as a spare can be used.

For example, if the probability of failure of one of the first and second signal side receiving circuits 36, 44 connected to a certain signal line 39 is P, then the receiving circuit connected to that signal line 39 The probability that both are defective is P ² . Therefore, the yield of the present liquid crystal display device can be significantly improved.

When a defect is found in a certain receiving circuit, a recognition code (spread code) incorporated in the modulated signal transmitted from the transmitting side circuit 33 to the receiving circuit is used as a backup for the defective receiving circuit. It may be changed to that of the receiving circuit.
For that purpose, the recognition code (spread code) of each receiving circuit stored in the transmitting side circuit 33 may be programmable from the outside. Alternatively, it may be programmed in advance so as to automatically switch to the recognition code of the spare receiving circuit when the defective receiving circuit is detected.

As described above, in the liquid crystal display device of the present embodiment, the first and second signal side receiving circuits 36 and 44 are connected to both ends of each signal line 39, and the first and second signal side receiving circuits 36 and 44 are connected to both ends of each scanning line 40. ,
The second scanning side receiving circuits 38 and 46 are connected. The one signal-side receiving circuit and the scanning-side receiving circuit are used as spares for the other signal-side receiving circuit and the scanning-side receiving circuit. Therefore, the yield of the present liquid crystal display device can be improved.

<Third Embodiment> In this embodiment, in the liquid crystal display device of the first and second embodiments, each receiving circuit is formed on a spherical semiconductor substrate and mounted on a liquid crystal panel. Regarding

FIG. 3 shows the liquid crystal display device of the present embodiment,
FIG. 6 is a plan view seen from a direction perpendicular to the surface of the active matrix substrate 51. Further, FIG. 4 shows A- in FIG.
It is an A'arrow arrow sectional view. Further, FIG. 5 shows B in FIG.
-B 'is a cross-sectional view taken along the arrow. As shown in FIG. 4, the counter substrate 52 is opposed to the active matrix substrate 51.
Are provided at predetermined intervals, and a liquid crystal layer 53 is formed between the active matrix substrate 51 and the counter substrate 52. In the plan view of FIG. 3, the counter substrate 52 and the liquid crystal layer 5 are
The state where 3 and 3 are removed is shown.

A substantially hemispherical groove 54 is formed on the surface of the active matrix substrate 51, and a spherical semiconductor substrate having the receiving circuits of the first and second embodiments is formed on the spherical semiconductor substrate. The integrated circuit 55 is fitted in the groove 54. A power supply line 56, a ground line 57, a transmission line 58 and a signal line (or a scanning line) 59 are formed on the active matrix substrate 51 and on the walls of the groove 54.

The shape of the groove 54 may be a part of a sphere. In that case, it is necessary to control the mounting direction of the spherical integrated circuit 55 so that the wiring formed on the spherical integrated circuit 55 and the wiring formed on the wall of the groove 54 are in proper contact with each other. In the semiconductor device of this embodiment, a part of the spherical integrated circuit 55 is polished flat, and the groove 54 has a shape in which a part of the sphere is flatly filled accordingly. There is. By doing so, the directional freedom when the spherical integrated circuit 55 is fitted in the groove 54 is limited to rotation about an axis perpendicular to the polished flat surface. At this time, the wirings 60 to 63 formed on the spherical integrated circuit 55 are, as shown in FIGS. 3 to 5, formed on the spherical integrated circuit 55 by a ring symmetrical with respect to an axis perpendicular to the flat surface. It is formed into a shape. Therefore, even if the spherical integrated circuit 55 rotates about the axis within the given degree of freedom, the wirings 60 to 63 formed on the spherical integrated circuit 55 are the wirings formed on the wall of the groove 54. 56-59
Each of them is properly contacted and electrically connected.

The active matrix substrate 51 may be made of glass and the glass substrate may be etched to form the grooves 54.
More preferably, the material of No. 1 is plastic. In that case, the formation of the groove 54 can be easily performed by press working.

The use of a spherical semiconductor substrate as the semiconductor substrate for the integrated circuit 55 has the following advantages over the case of using a flat semiconductor substrate. The material of the spherical semiconductor is basically the same semiconductor single crystal as the semiconductor single crystal base material, but it is possible to obtain a substance having a substantially spherical shape by solidifying in the state where no stress is applied. When a spherical semiconductor having such a spherical shape is used as a semiconductor substrate, the spherical substrate becomes more advantageous as the semiconductor substrate becomes smaller according to the geometrical characteristics of the sphere, as compared with a plate-shaped semiconductor substrate having the same mass. .

Therefore, by manufacturing a semiconductor device such as an integrated circuit using this spherical semiconductor as a semiconductor substrate, it is possible to improve the degree of integration and save resources. Further, unlike the case of a wafer, there is no step of cutting after film formation, so that the entire surface can be continuously covered with a passivation film. Therefore, the completed semiconductor device can be mounted without a package (so-called bare chip). In particular, even if the active matrix substrate 51 is a deformable material, the spherical semiconductor substrate is very resistant to cracking, so that it can be easily mounted on a bare chip. Therefore, the mounting process can be simplified. As the spherical semiconductor substrate used for the spherical integrated circuit 55, for example, a spherical silicon integrated circuit chip manufactured by Ball Semiconductor can be used.

In the liquid crystal display device of this embodiment,
Various receiving circuits connected to the signal lines and the scanning lines are formed on a spherical semiconductor substrate to form a spherical integrated circuit 55.
And Then, the spherical integrated circuit 55 is fitted in the groove 54 formed on the surface of the active matrix substrate 51. At that time, a part of the spherical integrated circuit 55 is ground flatly so that the groove 54 has a shape in which a part of the spherical body is flatly filled, and the direction of the spherical integrated circuit 55 fitted in the groove 54 is free. The degree is limited to rotation about an axis perpendicular to the flat surface.

Further, the active matrix substrate 5
1. A power supply line 56, a ground line 57, a transmission line 58 and a signal line (or a scanning line) 59 are formed on the upper part of the groove 1 and on the wall of the groove 54, and wirings 60 to 63 connected to these wirings 56 to 59 are connected to the spherical integrated circuit 55. It is formed in a ring shape that is symmetrical with respect to the axis perpendicular to the flat surface. Therefore, even if the spherical integrated circuit 55 rotates in the groove 54, the wirings 60 to 63 and the wirings 56 to 5 are formed.
9 and 9 are always correctly connected, and a decrease in yield when the integrated circuit 55 is mounted is suppressed.

Further, by using the integrated circuit 55 having a spherical semiconductor as a semiconductor substrate, it is possible to improve the degree of integration of the liquid crystal display device and save resources. Also, the entire surface can be continuously covered with a passivation film,
It is possible to mount with bare chips. Therefore,
The mounting process can be facilitated as compared with the case of mounting a flat semiconductor substrate.

In the present embodiment, the receiving circuit formed on the spherical semiconductor substrate is described as both the signal side receiving circuit and the scanning side receiving circuit. However, the present invention is not limited to this, and only one of the signal side receiving circuit and the scanning side receiving circuit may be formed on the spherical semiconductor substrate to form the spherical integrated circuit 55.

<Fourth Embodiment> This embodiment relates to a liquid crystal display device in which the third embodiment is applied to a liquid crystal display device in which a modulation signal is transmitted from the transmitting side circuit to each receiving circuit by electromagnetic waves. .

FIG. 6 is a circuit diagram of the liquid crystal display device of the present embodiment, and FIG. 7 is an enlarged plan view of a portion of the receiving circuit in FIG. Incidentally, FIG. 7 shows a state in which the counter substrate facing the active matrix substrate and the liquid crystal layer are removed.

In FIG. 6, the liquid crystal panel 71, the pixels 72,
Transmission side circuit 73, first signal driver circuit 75, first signal side reception circuit 76, first scanning driver circuit 77, first scanning side reception circuit 78, signal line 79, scanning line 80, TFT 81, pixel electrode 82, The two-signal driver circuit 83, the second signal-side receiving circuit 84, the second scanning driver circuit 85, and the second scanning-side receiving circuit 86 are the liquid crystal panel 31, the pixels 32, and the transmitting side shown in FIG. 2 in the second embodiment. Circuit 33, first signal driver circuit 35, first signal side receiving circuit 36, first scanning driver circuit 37, first scanning side receiving circuit 38, signal line 39, scanning line 40, TFT 41, pixel electrode 42, second signal The driver circuit 43, the second signal side receiving circuit 44, the second scanning driver circuit 45 and the second scanning side receiving circuit 46 are the same.

In the liquid crystal display device of the present embodiment, an antenna is provided in each of the receiving circuit and the transmitting side circuit which are formed by the spherical integrated circuit 55 in the third embodiment, and the transmitting side circuit receives the receiving circuit. The modulation signal is transmitted by electromagnetic waves. That is, the transmitting antenna 87 is connected to the transmitting side circuit 73. Further, the receiving antennas 88 and 8 are provided in the first and second signal side receiving circuits 76 and 84, respectively.
9 is connected. Similarly, receiving antennas 90 and 91 are connected to the first and second scanning side receiving circuits 78 and 86, respectively. In this way, the antennas 87, 88, 89, 9 are connected from the transmitting side circuit 73 to the receiving circuits 76, 84, 78, 86.
Since the modulated signal is transmitted by the electromagnetic wave via 0, 91, the transmission lines 14, 34 in the first and second embodiments are
Is unnecessary. Therefore, the wiring can be simplified as compared with the second embodiment.

As shown in FIG. 7, also in the present embodiment, as in the case of the third embodiment, each of the first and second
A receiving circuit composed of the signal side receiving circuits 76 and 84 and the first and second scanning side receiving circuits 78 and 86 is formed on a spherical semiconductor substrate to form a spherical integrated circuit 96. Then, the spherical integrated circuit 96 is fitted into the groove 97 formed on the surface of the active matrix substrate 95. At this time, the spherical integrated circuit 96 and a part of the groove 97 are flattened to form the groove 9
The degree of freedom in the direction of the integrated circuit 96 fitted in the device 7 is limited to only rotation about an axis perpendicular to the flat surface. Then, on the spherical integrated circuit 96, wirings 98 are formed in a ring shape symmetrical with respect to the above-mentioned axis, and the signal lines (or scanning lines) 99 are formed on the active matrix substrate 95 and the walls of the grooves 97. I am trying to connect.

Further, in the present embodiment, the antenna 88 (89, 90, 91) is formed on the spherical integrated circuit 96 in a ring shape symmetrical with respect to the axis.
The power supply line and the ground line are provided on the active matrix substrate 95 and the groove 9 as in the case of the third embodiment.
7 may be formed on the side wall, or the spherical integrated circuit 96 may be irradiated with electromagnetic waves from outside to collect electric power by the antenna 88 (89, 90, 91) formed on the integrated circuit 96. Good. As described above, when the antenna 88 (89, 90, 91) formed on the spherical integrated circuit 96 has a function of collecting electric power, the power supply line and the ground line are unnecessary, and the wiring is further simplified. be able to.

In the liquid crystal display device of this embodiment,
From the transmitting side circuit 73 to the receiving circuits 76, 84, 78, 8
A modulated signal is transmitted to the electromagnetic wave 6 by electromagnetic waves via the antennas 87, 88, 89, 90, 91. Therefore, the transmission line is not required, and the wiring is simplified. As a result, the wiring capacitance can be further reduced.
That is, according to the present embodiment, the power required to charge / discharge the wiring capacitance can be further reduced, and the liquid crystal display device can have low power consumption.

In the present embodiment, as shown in FIG. 6, a receiving circuit is connected to both ends of each signal line 79 and each scanning line 80. However, as shown in FIG. 1, the receiving circuit may be connected to only one of the signal lines 79 and the scanning lines 80.

<Fifth Embodiment> In the present embodiment, a bidirectional modulation is performed by electromagnetic waves through an antenna between the transmitting side circuit and each receiving circuit in the first to fourth embodiments. It relates to those adapted to send and receive signals.

FIG. 8 is a circuit diagram of the liquid crystal display device of this embodiment. The liquid crystal panel 101, the pixel 102, the first signal driver circuit 105, the first scanning driver circuit 107, the signal line 109, the scanning line 110, the TFT 111, the pixel electrode 112, the second signal driver circuit 113 and the second scanning driver circuit 115, In the fourth embodiment, the liquid crystal panel 71, the pixel 72, the first signal driver circuit 75, and the first signal driver circuit 75 shown in FIG.
Scan driver circuit 77, signal line 79, scan line 80, TFT
81, the pixel electrode 82, the second signal driver circuit 83, and the second scan driver circuit 85.

In the liquid crystal display device of the present embodiment, the first signal side transmitting / receiving circuit 106 forming the first signal driver circuit 105, the first scanning side transmitting / receiving circuit 108 forming the first scanning driver circuit 107, and the second scanning side transmitting / receiving circuit 108 Signal driver circuit 11
3, the second signal side transmitting / receiving circuit 114 and the second scanning side transmitting / receiving circuit 116 constituting the second scanning driver circuit 115 and the transmitting / receiving circuit 103 do not flow in one direction but in both directions. It is supposed to be done in person.

That is, the transmission / reception circuit 103 in this embodiment also has a reception function. In addition, the transmission / reception circuits 106, 114, 108, and 116 constituting the first and second signal driver circuits 105 and 113 and the first and second scanning driver circuits 107 and 115 also have a transmission function, respectively. The transmitting / receiving circuit 103 has a transmitting / receiving antenna 117, and the first and second signal side transmitting / receiving circuits 106, 114 have transmitting / receiving antennas 118, 119.
Transmission / reception antennas 120, 121 are connected to the first and second scanning side transmission / reception circuits 108, 116.

According to the above configuration, the transmission / reception circuit 103 or another first / second signal side is transmitted from the first / second signal side transmission / reception circuits 106, 114 and the first and second scanning side transmission / reception circuits 108, 116. Information can be transmitted to the transmission / reception circuits 106, 114 or other first and second scanning side transmission / reception circuits 108, 116. Therefore, it becomes possible to give the present liquid crystal display device more advanced functions. For example, when a failure occurs in the transmission / reception circuit connected to one end of the signal line 109 or the scanning line 110, the information is transmitted / received by the transmission / reception circuit itself in which the failure has occurred or a pair of transmission / reception circuits connected to the other end. It is transmitted to the circuit 103. Then, the transmission / reception circuit 103 changes the destination of the image signal to the paired transmission / reception circuit by incorporating the recognition code of the paired transmission / reception circuit into the modulation signal based on the information (spread-modulation with the spread code). You can do it.

As described above, in the liquid crystal display device of the present embodiment, any one of the transmission / reception circuits 106, 114, 108, 116 connected to the signal line 109 or the scanning line 110 can be connected to the other transmission / reception circuit 103, 106,114,10
Since information can be transmitted to the 8 and 116, the liquid crystal display device can have more advanced functions.

In this embodiment, the transceiver circuit 103 and the first and second signal side transceiver circuits 106 and 11 are used.
Information is bidirectionally transmitted / received between the fourth and first and second scanning side transmission / reception circuits 108 and 116 by electromagnetic waves through antennas 117, 118, 119, 120 and 121. However, the present invention is not limited to this, and the transmission / reception circuit, the signal side transmission / reception circuit, and the scanning side transmission / reception circuit may be connected by metal wiring.

In each of the above embodiments, the case of a liquid crystal display device has been described as an example. However, the present invention is not limited to this, and is applicable to those including all active matrix type display devices such as organic EL.

[0094]

As is apparent from the above, in the active matrix type display device of the first invention, the signal modulated based on the information for driving the display panel is transmitted from the transmission circuit of the display section drive circuit. When transmitted through the means, the scanning side receiving circuit demodulates the modulated signal to generate a voltage for selecting a pixel of the display panel, and the signal side receiving circuit demodulates the modulated signal. Since it generates a voltage for displaying the selected pixel, it is not necessary to divide the transmission line for each signal line and scanning line of the display panel, and the transmission circuit, the signal side receiving circuit, and the scanning side receiving circuit are provided. Need only be connected by at least one transmission line. Therefore, the wiring capacity can be reduced by significantly simplifying the wiring in the area other than the display panel. Therefore, the current for driving the display panel is reduced, and the area of each circuit for driving the display panel including the area required for wiring can be reduced.

Further, the amplitude (voltage) of the modulated signal propagating through the transmission line can be made extremely smaller than the voltage applied to the signal line or the scanning line. Therefore, the power for transmitting the modulated signal can be sufficiently reduced, and the power consumption of the circuit for driving the display panel can be reduced.

Further, in the active matrix type display device of the one embodiment, the signal side receiving circuit is provided for each of the signal lines by two.
Since one scanning circuit is connected to each scanning line and two scanning-side receiving circuits are connected to each scanning line, if one of the receiving circuits becomes defective, the other receiving circuit as a spare can be used. Therefore, the yield can be significantly improved.

In the active matrix type display device of one embodiment, at least one of the signal side receiving circuit and the scanning side receiving circuit is formed on a spherical semiconductor substrate and mounted on the display panel substrate. As a result, it is possible to implement the so-called bare chip. Therefore, the mounting process can be facilitated as compared with the case of mounting a flat semiconductor substrate.

In the active matrix type display device of the first embodiment, the PSK system, F
Since the signal modulated by any one of the SK system, the ASK system and the pulse code modulation system is used, the transmission circuit, each signal side receiving circuit and each scanning side receiving circuit can be configured relatively easily. Further, since a recognition code is assigned to each of the signal side receiving circuits and each of the scanning side receiving circuits, and the identification code assigned to the destination receiving circuit is incorporated into the modulated signal, it is easy to receive a specific signal side reception. Information can be transmitted to the circuit or the scanning side receiving circuit.

Further, since the active matrix type display device of the first embodiment uses the signal modulated by the CDMA system as the modulated signal, the noise resistance performance can be improved. Further, since a spreading code is assigned to each of the signal side receiving circuit and each of the scanning side receiving circuits, and as the modulated signal, a signal which is spread and modulated using the spreading code assigned to the receiving circuit of the transmission destination is transmitted. Only a specific signal side receiving circuit or scanning side receiving circuit can transmit a signal that can be demodulated.

Further, in the active matrix type display device of one embodiment, the recognition code or the spread code is stored in any one of the display section drive circuit, the signal side receiving circuit and the scanning side receiving circuit. In addition, since it is rewritable from the outside, after the signal side receiving circuit and the scanning side receiving circuit manufactured as the same type are mounted on the substrate of the display panel, the specific signal side receiving circuit and the scanning side receiving circuit are received. It can be operated as a circuit. In addition, the display section drive circuit manufactured as the same type,
It can also be used for other display panels having different numbers of pixels. That is, the display section drive circuit, the signal side reception circuit, and the scanning side reception circuit can be commonly used in display devices of different types, and the development cost can be suppressed.

Further, in the active matrix type display device of the first embodiment, since the transmitting means is an antenna and the transmitted signal is a modulated electromagnetic wave signal, the transmission line is unnecessary. Therefore, it is possible to further simplify the wiring in the area other than the display panel and further reduce the wiring capacitance. As a result, the power required to charge and discharge the wiring capacitance is further reduced, and the power consumption can be further reduced.

In the active matrix type display device of the first embodiment, the antenna can collect current by irradiating electromagnetic waves from the outside, and the signal side receiving circuit and the scanning side receiving circuit collect the electric current by the antenna. Since it operates by the generated electric power, the power supply line and the ground line are not required, and the wiring can be further simplified.

The active matrix type display device according to the second aspect of the present invention has a function of transmitting a signal obtained by modulating the transmitting / receiving circuit of the display section drive circuit based on the information for driving the display panel, and another circuit. And the function of receiving and demodulating the modulated signal of each of the scanning side transmitting and receiving circuits, and the function of receiving and demodulating the modulated signal and generating the voltage for pixel selection It has a function of transmitting a signal, and each signal side transmitting / receiving circuit has a function of receiving and demodulating the modulated signal to generate a voltage for display and a function of transmitting the modulated signal. The transmitting means transmits the modulated signal from the transmitting / receiving circuit to the signal side transmitting / receiving circuits and the scanning side transmitting / receiving circuits, while the signal side transmitting / receiving circuits or the scanning side transmitting circuits are provided. Since the modulated signal from the reception circuit is transmitted to the transmission / reception circuit, as in the case of the first invention, wiring other than the display panel is simplified to reduce wiring capacitance, The area and power consumption of each circuit that drives the panel can be reduced.

Further, since the transmitting / receiving circuit, each signal side transmitting / receiving circuit and each scanning side transmitting / receiving circuit can communicate with each other, it is possible to provide more advanced functions.

Further, in the active matrix type display device of the one embodiment, the signal side transmission / reception circuits are connected to each two signal lines and the scanning side transmission / reception circuits are connected to each two scanning lines. If one of the transmitting / receiving circuits becomes defective, the other transmitting / receiving circuit as a spare can be used. Therefore, the yield can be significantly improved.

In the active matrix type display device of one embodiment, at least one of the signal side transmitting / receiving circuit and the scanning side transmitting / receiving circuit is formed on a spherical semiconductor substrate and mounted on the display panel substrate. As a result, it is possible to implement the so-called bare chip. Therefore,
The mounting process can be facilitated as compared with the case of mounting a flat semiconductor substrate.

In the active matrix type display device of the first embodiment, as the modulated signal, the PSK system, F
Since the signal modulated by any one of the SK system, the ASK system and the pulse code modulation system is used, the transmitting / receiving circuit, each signal side transmitting / receiving circuit and each scanning side transmitting / receiving circuit can be configured relatively easily. Further, since a recognition code is assigned to the transmission / reception circuit, each signal side transmission / reception circuit, and each scanning side transmission / reception circuit, and the identification code assigned to the transmission / reception circuit of the transmission destination is incorporated in the modulated signal, it is possible to easily specify the identification code. Information can be transmitted to the transmitting / receiving circuit, the signal side transmitting / receiving circuit, or the scanning side transmitting / receiving circuit.

Further, since the active matrix type display device of the first embodiment uses the signal modulated by the CDMA system as the modulated signal, the noise resistance performance can be improved. Furthermore, the transmission / reception circuit, each signal side transmission / reception circuit and each scanning side transmission / reception circuit is assigned a spread code,
As the modulated signal, a signal that is spread-modulated using a spreading code assigned to the transmission / reception circuit of the transmission destination is transmitted, so a signal that can be demodulated only by a specific transmission / reception circuit, a signal-side transmission / reception circuit or a scanning-side transmission / reception circuit Can be transmitted.

In the active matrix type display device of the first embodiment, the recognition code or the spread code is stored in any one of the display section drive circuit, the signal side transmitting / receiving circuit and the scanning side transmitting / receiving circuit. In addition, since it is rewritable from the outside, the signal side transmission / reception circuit and the scanning side transmission / reception circuit manufactured as the same product are mounted on the substrate of the display panel, and then the specified signal side transmission / reception circuit and the scanning side transmission / reception It can be operated as a circuit. Further, the display section drive circuits manufactured as the same type can be used for other display panels having different numbers of pixels. That is, the display section drive circuit, the signal side transmission / reception circuit, and the scanning side transmission / reception circuit can be commonly used in display devices of different types, and the development cost can be suppressed.

Further, in the active matrix type display device of the first embodiment, since the transmitting means is an antenna and the transmitted signal is a modulated electromagnetic wave signal, the transmission line is unnecessary. Therefore, it is possible to further simplify the wiring in the area other than the display panel and further reduce the wiring capacitance. As a result, the power required to charge and discharge the wiring capacitance is further reduced, and the power consumption can be further reduced.

In the active matrix type display device of one embodiment, the antenna can collect electric current by irradiating electromagnetic waves from the outside, and the signal side transmitting / receiving circuit and the scanning side transmitting / receiving circuit collect electric power by the antenna. Since it operates by the generated electric power, the power supply line and the ground line are not required, and the wiring can be further simplified.

Further, in the active matrix type display device of the first embodiment, since the display section drive circuit transmits the modulated signal for random access to each pixel, only the necessary pixels are displayed. Can be accessed and the frequency of the modulated signal transmitted by the transmission means can be reduced. Alternatively, the percentage of time that the modulated signal is stopped can be increased.
Therefore, it is possible to further reduce power consumption.

Further, in the active matrix type display device of the first embodiment, the display panel is a liquid crystal display panel or an organic EL display panel. Therefore, when a liquid crystal display panel is used as the display panel, low power consumption is achieved. High-definition display can be performed with electric power. On the other hand, when an organic EL display panel that emits light by itself is used, display with high brightness and a wide viewing angle can be performed.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a liquid crystal display device as an active matrix display device of the present invention.

FIG. 2 is a circuit diagram of a liquid crystal display device different from that in FIG.

FIG. 3 is an enlarged plan view of a receiving circuit portion in a liquid crystal display device different from FIGS. 1 and 2.

4 is a cross-sectional view taken along the line AA ′ in FIG.

5 is a sectional view taken along the line BB ′ in FIG.

FIG. 6 is a circuit diagram of a liquid crystal display device different from FIGS. 1 and 2.

7 is an enlarged plan view of a receiving circuit portion in FIG.

FIG. 8 is a circuit diagram of a liquid crystal display device different from FIGS. 1, 2 and 6.

FIG. 9 is a diagram showing a configuration of a conventional liquid crystal display device.

[Explanation of symbols]

11, 31, 71, 101 ... Liquid crystal panel, 12, 32, 72, 102 ... Pixel, 13, 33, 73 ... Transmission side circuit, 14, 34, 58 ... Transmission line, 15 ... Signal driver circuit, 16 ... Signal side Reception circuit, 17 ... Scan driver circuit, 18 ... Scan side reception circuit, 19, 39, 79, 109 ... Signal line, 20, 40, 80, 110 ... Scan line, 21, 41, 81, 111 ... TFT, 22, 42, 82, 112 ... Pixel electrode, 35, 75, 105 ... First signal driver circuit, 36, 76 ... First signal side receiving circuit, 37, 77, 107 ... First scanning driver circuit, 38, 78 ... First Scanning side receiving circuit, 43, 83, 113 ... Second signal driver circuit, 44, 84 ... Second signal side receiving circuit, 45, 85, 115 ... Second scanning driver circuit, 46, 86 ... Second scanning side receiving circuit , 51, 95 ... Active matrix substrate, 52 ... Pair Substrate, 53 ... Liquid crystal layer, 54, 97 ... Groove, 55, 96 ... Spherical integrated circuit, 56 ... Power line, 57 ... Ground line, 59, 99 ... Signal line (or scanning line), 60-63, 98 ... Wiring, 87 ... Transmission antenna, 88, 89, 90, 91 ... Reception antenna, 103 ... Transceiver circuit, 106 ... First signal side transceiver circuit, 108 ... First scanning side transceiver circuit, 114 ... Second signal side transceiver Circuit, 116 ... Second scanning side transmitting / receiving circuit, 117, 118, 119, 120, 121 ... Transmitting / receiving antenna.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G09G 3/20 621 G09G 3/20 621M 633 633H 633K 680 680G 3/30 3/30 H (72) Inventor Tomohisa Okuno 22-22, Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Prefecture Sharp Corporation (72) Inventor Seizo Kakimoto 22-22, Nagaike-cho, Abeno-ku, Osaka City, Osaka Prefecture F-term (reference) 2H093 NA06 NA16 NA46 NC09 NC11 NC21 ND42 ND49 ND54 NE07 5C006 AF50 BB16 BC03 BC11 BC20 BC21 FA32 FA42 5C080 AA06 AA10 BB05 DD23 DD28 FF11 JJ02 JJ06 5C094 AA15 AA22 AA42 AA43 ADB19 DB10 DB01 DB11 DB02 DB11 DB02 DB11 DA02 DB11

Claims (18)

[Claims] 1. A plurality of signal lines arranged in one direction, a plurality of scanning lines arranged in another direction different from the one direction, and a matrix in the vicinity of a crossing position of each signal line and each scanning line. In an active matrix display device that drives a display panel including pixels arranged in a line and connected to the signal line and the scanning line to display the pixel, based on information for driving the display panel. And a display section drive circuit including a transmission circuit for transmitting a modulated signal, and receiving the modulated signal and demodulating the generated signal to generate a voltage for selecting the pixel. A scanning side receiving circuit, a signal side receiving circuit which is connected to each of the signal lines and which receives the modulated signal and demodulates it to generate a voltage for displaying the selected pixel; Circuit and Transmission means connected to each of the signal side receiving circuit and each scanning side receiving circuit and transmitting the modulated signal from the transmitting circuit to each signal side receiving circuit and each scanning side receiving circuit An active matrix type display device characterized by: 2. The active matrix display device according to claim 1, wherein two signal-side receiving circuits are connected to each of the signal lines, and the scanning-side receiving circuit is connected to each of the scanning lines. An active matrix type display device characterized in that two units are connected to each. 3. The active matrix display device according to claim 1, wherein at least one of the signal side receiving circuit and the scanning side receiving circuit is formed on a spherical semiconductor substrate. At the same time, it is mounted on the substrate of the above display panel, and an active matrix type display device. 4. The active matrix display device according to claim 1, wherein a recognition code is assigned to each of the signal side receiving circuit and each scanning side receiving circuit, The modulated signal is modulated by any one of a phase displacement modulation system, a frequency displacement modulation system, an amplitude displacement modulation system and a pulse code modulation system, and is assigned to a receiving circuit of a transmission destination. An active matrix type display device characterized by being a signal in which a recognition code is incorporated. 5. The active matrix display device according to claim 1, wherein spread codes are assigned to the signal side reception circuits and the scanning side reception circuits, respectively. The active matrix type display device, wherein the modulated signal is a signal which is spread and modulated by a code division multiple access method using a spreading code assigned to a receiving circuit of a transmission destination. 6. The active matrix type display device according to claim 4 or 5, wherein the recognition code or the spread code is the display section drive circuit, the signal side receiving circuit and the scanning side receiving circuit. An active matrix type display device characterized in that the recognition code or the spreading code stored in either one of the above is rewritable from the outside. 7. The active matrix type display device according to claim 1, wherein the transmission means is an antenna, and the transmitted signal is a modulated electromagnetic wave signal. Characteristic active matrix type display device. 8. The active matrix type display device according to claim 7, wherein the antenna is capable of collecting current by irradiating an electromagnetic wave from the outside, and each of the signal side receiving circuits and each of the signal receiving circuits. The active matrix type display device, wherein the scanning side receiving circuit is operated by the electric power collected by the antenna. 9. A plurality of signal lines arranged in one direction, a plurality of scanning lines arranged in another direction different from the one direction, and a matrix near a crossing position of each signal line and each scanning line. An active matrix display device for driving the display panel including pixels arranged in a line and connected to the signal line and the scanning line to display the pixel, a display portion drive circuit including a transmission / reception circuit, and Scanning side transmitting / receiving circuit connected to each scanning line, signal side transmitting / receiving circuit connected to each signal line, transmission connected to each of the transmitting / receiving circuit, each scanning side transmitting / receiving circuit, and each signal side transmitting / receiving circuit And a means for transmitting a signal modulated based on the information for driving the display panel, and a modulated signal from each signal side transmitting / receiving circuit and each scanning side transmitting / receiving circuit. The scanning side transmitting / receiving circuit receives the demodulated signal and demodulates it, and generates a voltage for selecting the pixel, and the display panel of the display panel. It has a function of transmitting a signal modulated based on information different from drive information, and each of the signal side transmission / reception circuits receives and demodulates the modulated signal to display the selected pixel. And a function of transmitting a signal modulated based on information different from the drive information of the display panel, wherein the transmission means outputs the modulated signal from the transmission / reception circuit to the above. While transmitting to each signal side transmitting / receiving circuit and each scanning side transmitting / receiving circuit, the modulated signal from each signal side transmitting / receiving circuit or each scanning side transmitting / receiving circuit is transmitted to the transmitting / receiving circuit. The active matrix type display device comprising and. 10. The active matrix display device according to claim 9, wherein two signal-side transmitting / receiving circuits are connected to each signal line, and two scanning-side transmitting / receiving circuits are connected to each scanning line. An active matrix type display device characterized by being connected two by two. 11. The active matrix display device according to claim 9, wherein at least one of the signal side transmission / reception circuit and the scanning side transmission / reception circuit is formed on a spherical semiconductor substrate. At the same time, it is mounted on the substrate of the above display panel, and an active matrix type display device. 12. The active matrix type display device according to claim 9, wherein a recognition code is assigned to each of the transmission / reception circuit, each signal side transmission / reception circuit and each scanning side transmission / reception circuit. The modulated signal is modulated by any one of the phase displacement modulation method, the frequency displacement modulation method, the amplitude displacement modulation method and the pulse code modulation method, and is transmitted to the transmission / reception circuit of the transmission destination. An active matrix type display device characterized by being a signal in which an assigned recognition code is incorporated. 13. The active matrix display device according to claim 9, wherein spread codes are assigned to the transmission / reception circuit, each signal side transmission / reception circuit, and each scanning side transmission / reception circuit. The active matrix type display device, wherein the modulated signal is a signal which is spread and modulated by a code division multiple access method using a spreading code assigned to a transmission / reception circuit of a transmission destination. 14. The active matrix type display device according to claim 12 or 13, wherein the recognition code or the spread code is the display section drive circuit, the signal side transmission / reception circuits and the scanning side transmission / reception circuits. An active matrix type display device characterized in that the recognition code or the spreading code stored in either one of the above is rewritable from the outside. 15. The active matrix type display device according to claim 9, wherein the transmission means is an antenna, and the transmitted signal is a modulated electromagnetic wave signal. Characteristic active matrix type display device. 16. The active-matrix display device according to claim 15, wherein the antenna is capable of collecting current by irradiating an electromagnetic wave from the outside, and the signal-side transmitting / receiving circuits and the scanning circuits are provided. The side transceiver circuit is
An active matrix type display device characterized by being operated by electric power collected by the antenna. 17. The active matrix display device according to claim 1, wherein the display drive circuit outputs the modulated signal for random access to each pixel. An active matrix type display device characterized by being adapted to transmit. 18. The active matrix display device according to claim 1, wherein the display panel is a liquid crystal display panel or an organic electroluminescence display panel. Matrix display device.