JP2000162982A - Driving circuit for electro-optical device, electro-optical device, and electronic apparatus - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To convert a serial-parallel converted image signal into
For example, an image signal processing circuit that supplies an electro-optical device including a liquid crystal device inverts a display image on the electro-optical device while equally supplying image signals. SOLUTION: A data line driving circuit (101) includes a shift register (101R) for right shift and a shift register (101L) for left shift. The plurality of sampling switches (302R, 302L) are respectively driven by right shift and left shift shift registers.
And a second group. The output terminal of each sampling switch included in each of the first and second groups is connected in parallel to each of the plurality of data lines (6a). The i-th sampling switch to the right in the first group and the i-th sampling switch to the left in the second group are connected to the same image signal line (115).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-optical device (for example, a liquid crystal device, etc.) such as an active matrix drive system using a thin film transistor (hereinafter, appropriately referred to as TFT), a thin film diode (hereinafter, appropriately referred to as TFD), or the like. The present invention belongs to the technical field of the drive circuit and the electro-optical device incorporating the drive circuit, and particularly to the technical field of the drive circuit of the electro-optical device suitably used as a light valve of a projector or the like.

[0002]

2. Description of the Related Art Conventionally, when an electro-optical device such as a liquid crystal device is used as a light valve of a projector of this type, a single-plate system using only one electro-optical device having a color filter formed on a counter substrate is known. There is a double-plate system in which three electro-optical devices without a color filter are used for each of RGB. The single-plate system is simpler in configuration, but the double-plate system is more excellent in that the display screen is bright and high quality image quality is obtained. According to this double-plate system, three-color lights separately modulated by three electro-optical devices are combined into one projection light by a prism or a dichroic mirror, and then projected on a screen.

[0003] When synthesized by a prism or the like, for example, as shown in FIG. 13, R light and B light reflected by a prism 502 after modulation by three light valves 500R and 500G for RGB and 500B. Compared to
The G light is not reflected by the prism 502. That is, the number of times of light inversion is reduced once for G light. This phenomenon is the same even if the optical system is configured so that the R light or the B light is not reflected by the prism instead of the G light,
Further, the same occurs when three color lights are combined using a dichroic mirror or the like. Therefore, in such a case, it becomes necessary to invert the image signal for the G light in some form.

[0004] On the other hand, in terms of product strategy, it is desired that the single-panel or double-panel projector can be used as a floor-standing type, which is normally installed on the floor, or as a ceiling-mounted type, which is installed upside down on the ceiling. There are cases. In this case, even in the single-panel system, it is necessary to invert the image signal supplied to the electro-optical device up, down, left, and right in accordance with the manner of installation. Also, like the LCD monitor of a portable video camera,
In some cases, it is desired that a liquid crystal monitor, which is a single-plate electro-optical device, can be inverted and viewed, for example, with a flexible joint as a fulcrum, depending on the shooting posture of the user. In this case, it is necessary to invert the image signal supplied to the electro-optical device up, down, left, and right in some way.

Therefore, conventionally, an image signal processing IC for supplying an image signal to a data line driving circuit in an electro-optical device in a predetermined format, for example, for only an image signal for G, or an image signal for all colors, An image signal corresponding to an image whose top, bottom, left and right are inverted with respect to the original image is 1
Generate and supply for each field. If you do this,
In particular, there is no need to make any changes to the electro-optical device and the drive circuit, which is convenient.

Or, conventionally, for example, as described above, in order to combine three color lights, an electro-optical device whose scanning direction is reversed left and right as compared with the electro-optical device for R and the electro-optical device for B is known. , G are used as electro-optical devices.

[0007]

However, the above-described method of inverting an image signal vertically and horizontally using the conventional image signal processing IC requires image signal processing in order to cope with recent high-definition images. The burden on the IC is too large to be practical.

Further, the system using the electro-optical device for G in which the scanning direction is inverted vertically and horizontally has the following problems.
That is, in general, a scanning line driving circuit and a data line driving circuit have a unidirectional shift register in which a transfer direction is fixed to one side, and line-sequential or A scanning signal or an image signal is supplied in a dot-sequential manner, and scanning is performed on a display screen vertically and horizontally. Therefore, in order to use an electro-optical device for G whose scanning direction is reversed, an R-shift electro-optical device in which a shift register is configured so that a data line driving circuit scans a display screen from left to right is used. In addition, there is a need to manufacture two types, namely, an L-shift type electro-optical device in which a shift register is configured so that the data line driving circuit scans the display screen from right to left. It is clearly disadvantageous from the standpoint of a manufacturer to manufacture two types of electro-optical devices in a TFT manufacturing process using a semiconductor manufacturing device, for example. Also, from the user's point of view, there is a practical problem that similar electro-optical devices are not compatible with each other, and each individual device can be used only as one of the types. In addition, the electro-optical device having the fixed scanning direction realizes a projector that can be used as the floor-standing type or the ceiling-hanging type, and a liquid crystal monitor of a portable video camera in which the screen is turned upside down and left and right. Can not.

If a bidirectional shift register is employed for the scanning line driving circuit and the data line driving circuit, and the transfer direction of the output transfer signal is inverted up and down or left and right, the scan signal and the image signal Reversing the supply order,
That is, the horizontal scanning direction and the vertical scanning direction can be inverted up, down, left, and right. However, if a bidirectional shift register is employed, the number of gates constituting the shift register is increased as compared with the case of the above-described unidirectional shift register. There is a problem that power increases.

Further, if a bidirectional shift register is employed, a plurality of images must be displayed in accordance with the reversal of the horizontal scanning direction based on the image signals, especially when displaying by the serial-parallel-converted image signals. There is a problem that the order of image signals supplied in parallel to the signal lines also needs to be changed.

More specifically, for example, as shown in the upper half of FIG.
Consider a case where ID1 to VID6 are supplied. in this case,
The pixel data # 1 to # 6n for one field of the display image during the time ΔT by the external image signal processing IC (however,
n are natural numbers) are sequentially assigned to the image signals VID1 to VID6, and the six image signal lines No. 1 to No. 6. As shown in the upper half of FIG. 14, when performing six horizontal scanning operations simultaneously or sequentially, the parallel image signals VID1, VID2, VID3,.
VID6 is connected to six image signal lines No. 1, No. 2, N
o. 3,... 6 in this order. still,
In the case where six lines are simultaneously driven, six adjacent image signals may be simultaneously sampled during the time Δt in the figure. In the case of sequential driving, each image signal is sampled during the time Δt in the figure. Sampling may be performed sequentially, and in any case, sampling can be performed even if the performance of the sampling switch is low as compared with the case where serial-parallel conversion is not performed. On the other hand, as shown in the lower half of FIG. 14, when the horizontal scanning direction is reversed, the parallel image signals VID1, VID2, VID
.., VID6 are exchanged, and the image signal lines NO. 6,
NO. 5, NO. 4,..., NO. 1 must be supplied in this order.

As described above, if a bidirectional shift register is employed, there is little problem with a single-phase image signal. In the case of the converted image signal, it is necessary to change the order of the image signals to be supplied in parallel with respect to each image signal line on the image signal processing IC side, and simply supplying the same image signal to the electro-optical device is not enough. However, there is a problem that the function of the inverted display cannot be achieved.

The present invention has been made in view of the above-described problems, and an image signal processing circuit that supplies serial-to-parallel converted image signals through a plurality of image signal lines supplies the image signals equally. Another object of the present invention is to provide a driving circuit of an electro-optical device capable of easily inverting a display image and an electro-optical device incorporating the driving circuit.

[0014]

In order to solve the above-mentioned problems, a driving circuit for an electro-optical device according to the present invention has a substrate on which serial-parallel converted image signals supplied to a plurality of image signal lines are sampled. A sampling circuit including a plurality of sampling switches that sample in accordance with a circuit drive signal and supply the plurality of data lines to the plurality of data lines; and a data line drive circuit that supplies the sampling circuit drive signal to the sampling circuit. A first shift register that sequentially outputs the sampling circuit drive signal in a predetermined direction with respect to the arrangement of the plurality of sampling switches; And a second shift register for sequentially outputting the sampling circuit drive signal in the reverse direction. A plurality of sampling switches, a first group driven by a sampling circuit driving signal supplied from the first shift register, and a second group driven by a sampling circuit driving signal supplied from the second shift register. The output terminal of each sampling switch included in the first group and the output terminal of each sampling switch included in the second group are connected in parallel to each of the plurality of data lines. It is characterized by being.

According to the present invention, there is provided an electro-optical device for driving an electro-optical device having a plurality of data lines and a plurality of scanning lines intersecting an electro-optical material between a pair of substrates. A drive circuit for an optical device, comprising: a plurality of sampling switches which sample serial-parallel-converted image signals supplied to a plurality of image signal lines in accordance with a sampling circuit drive signal and supply the sampled signals to the plurality of data lines, respectively. And a data line drive circuit for supplying the sampling circuit drive signal to the sampling circuit, wherein the data line drive circuit is arranged in a predetermined direction with respect to the arrangement of the plurality of sampling switches. A first shift register for sequentially outputting the sampling circuit drive signal and an arrangement of the plurality of sampling switches; A second shift register for sequentially outputting the sampling circuit drive signal in a direction opposite to the predetermined direction, wherein the plurality of sampling switches are driven by a sampling circuit drive signal supplied from the first shift register. One group and a second group driven by a sampling circuit drive signal supplied from the second shift register, and the output terminals of each sampling switch included in the first group and the second group are included in the second group. The output terminal of each sampling switch is connected in parallel to each of the plurality of data lines.

According to the driving circuit of the electro-optical device of the present invention, serial-parallel-converted image signals are supplied to the plurality of image signal lines from an external image signal processing circuit. For example, six image signals VID1 to VID6 that have been subjected to serial-parallel conversion are supplied to six image signal lines.

Here, as a first case, if the first shift register of the data line driving circuit is operated in parallel with the scanning signal supply operation, the sampling circuit driving signal is applied to the arrangement of a plurality of sampling switches. The signals are sequentially output in a predetermined direction (for example, “rightward” from left to right), and the sampling switches of the first group are driven in accordance with the sampling circuit drive signal, and the serial switches supplied to the plurality of image signal lines are output. -The parallel-converted image signal is sampled. The sampled image signal is supplied to each data line connected to the output terminal of each sampling switch of the first group (in parallel with the output terminal of each sampling switch of the second group).

Alternatively, as a second case, if the second shift register of the data line driving circuit is operated in parallel with this scanning signal supply operation, the sampling circuit driving signal is turned in the opposite direction (for example, The signals are sequentially output in the “left direction” from right to left, and the sampling switches of the second group are driven in accordance with the sampling circuit drive signal, and are subjected to serial-parallel conversion to be supplied to a plurality of image signal lines. The image signal is sampled. The sampled image signal is supplied to each data line connected to the output terminal of each sampling switch of the second group (in parallel with the output terminal of each sampling switch of the first group).

Therefore, both the case where the first shift register is operated and the sampling circuit drive signal is sequentially supplied in a predetermined direction and the case where the second shift register is operated and the sampling circuit drive signal is sequentially supplied in the opposite direction are both ends. It is possible to supply an image signal from the same image signal line to each data line corresponding to the same number counting from the same through each sampling switch. Therefore, there is no need to change the order of each image signal for each image signal line in the plurality of serial-parallel-converted image signals, and the horizontal signal can be changed depending on whether the first shift register or the second shift register is operated. By inverting the scanning direction left and right,
The displayed image can be inverted right and left.

As described above, the predetermined switching operation on the drive circuit side of the electro-optical device (that is, the switching operation of the image signal lines with respect to the image signal lines) is performed without the operation load on the external image signal processing circuit side. If a relatively simple operation of switching the shift register to be operated) is performed, the displayed image can be reversed left and right by reversing the horizontal scanning direction.

In the vertical scanning direction, the serial
There is no complicated signal supply such as parallel conversion. For this reason, if necessary, the supply order of the scanning signals to be sequentially supplied to each scanning line simply by using a bidirectional shift register or two unidirectional shift registers whose scanning directions are downward and upward respectively. , The vertical scanning direction can be flipped up and down, which allows the horizontal scanning direction and the vertical scanning direction to be flipped left and right and up and down. A drive circuit of the reversible electro-optical device can be realized.

In one embodiment of the driving circuit of the electro-optical device according to the present invention, i is set in the predetermined direction in the first group.
(Where i is a natural number) a sampling switch,
The i-th sampling switch in the reverse direction in the second group is connected to the same image signal line.

According to this aspect, the i-th sampling switch in the predetermined direction (for example, rightward) in the first group and the i-th sampling switch in the reverse direction (for example, leftward) in the second group are: Since they are connected to the same image signal line, the first shift register is operated to sequentially supply the sampling circuit drive signal in a predetermined direction, and the second shift register is operated to sequentially send the sampling circuit drive signal in the reverse direction. In the case of supply,
An image signal from the same image signal line is reliably supplied to the data line corresponding to the same number counted from both ends via each sampling switch. Therefore, there is no need to change the order of each image signal for each image signal line in the plurality of serial-parallel-converted image signals, and the horizontal signal can be changed depending on whether the first shift register or the second shift register is operated. By inverting the scanning direction left and right, the displayed image can be surely inverted left and right.

In another aspect of the driving circuit of the electro-optical device according to the present invention, the sampling switches belonging to the first group and the sampling switches belonging to the second group are alternately arranged along the predetermined direction. The pair of sampling switches that belong to the first and second groups and are adjacent to each other are connected to the same data line.

According to this aspect, the pair of sampling switches connected in parallel to the same data line and adjacent to each other are regularly and alternately arranged between the first and second groups, and the wiring for the sampling circuit drive signal and A planar layout in which the wiring from the image signal line to the data line via the sampling switch is compactly obtained is obtained.

In another aspect of the driving circuit of the electro-optical device according to the present invention, the image signal lines are composed of n lines (n is a natural number) and are connected to the adjacent n lines of the first group. The order of the image signal lines and the order of the n image signal lines connected to the adjacent n pieces of the second group are right and left and right.

According to this aspect of the present invention, the order of the n image signal lines connected to the adjacent n pixels of the first group and the adjacent n pixels of the second group are selected.
Since the order of the n image signal lines connected to the image signal is right and left and right, the image signal processing circuit does not make any change to the image signal to be input from the outside. The displayed image can be easily inverted left and right.

In another aspect of the driving circuit of the electro-optical device according to the present invention, one sampling circuit driving signal line for supplying a sampling circuit driving signal from the first shift register is connected to n adjacent sampling circuits of the first group. One sampling circuit drive signal line, which is connected in parallel to the sampling switch and supplies a sampling circuit drive signal from the second shift register, is connected in parallel to adjacent n sampling switches in the second group. It is characterized by.

According to the configuration of the present invention, since n data lines are simultaneously driven, sampling time for each image signal can be longer than in the case of sequentially driving one data line at a time. As a result, sampling can be performed even if the performance of the sampling switch is low.

In another aspect of the drive circuit of the electro-optical device according to the present invention, the drive circuit is formed on the substrate.

According to this aspect, in the electro-optical device of a drive circuit built-in type in which the drive circuit is formed on the substrate of the electro-optical device, the displayed image can be easily inverted right and left.

In another aspect of the driving circuit of the electro-optical device according to the present invention, one of the first and second shift registers selectively operates according to a selection signal.

According to this aspect, for example, if a selection signal for selectively operating the first or second shift register is supplied from the outside, the first or second shift register operates accordingly, and The sampling operation is performed by the first or second group of sampling switches. Therefore, the horizontal scanning direction is set to the right or left according to the selection signal. Further, by setting the shift register that is not selected to a non-operating state, power consumption in the data line driving circuit can be reduced, and ultimately, power consumption of the entire driving circuit can be reduced.

In another aspect of the drive circuit of the electro-optical device according to the present invention, the first and second shift registers are supplied with individual clock signals each serving as a reference for the generation timing of the sampling circuit drive signal. .

According to this aspect, since the first and second shift registers are supplied with the individual clock signals, respectively.
When the first or second group of sampling switches is driven by one shift register, even if the operation of the other shift register is stopped for each clock signal supplied thereto, there is no hindrance to the operation of one shift register. Don't even come. Therefore, by disabling unnecessary shift registers together with the clock signal, power consumption of the data line driver circuit can be reduced, and ultimately, power consumption of the entire driver circuit can be reduced.

Alternatively, the first and second shift registers may be supplied together with a common clock signal serving as a reference for the timing of generating the sampling circuit drive signal.

With this configuration, a common clock signal is supplied to the first and second shift registers.
It is possible to simplify a wiring pattern for a clock signal routed in the scanning line driving circuit.

In another aspect of the drive circuit of the electro-optical device according to the present invention, the drive circuit further includes a scan line drive circuit for supplying a scan signal to the scan lines, wherein the scan line drive circuit is provided for the plurality of scan lines. A third shift register for sequentially outputting the scan signal, and a fourth shift register for sequentially outputting the scan signal in a direction opposite to a direction in which the scan signal is sequentially output from the third shift register.

According to this aspect, when the third shift register is operated, the scanning line driving circuit performs vertical scanning in which the vertical scanning direction is a predetermined direction (for example, a downward direction from top to bottom). By operating the fourth shift register, vertical scanning in which the vertical scanning direction is the opposite direction (for example, upward from bottom to top) can be performed. Therefore, depending on whether the third shift register is operated or the fourth shift register is operated, the vertical scanning direction can be inverted up and down. As a result, by selectively operating the first and second shift registers and the third and fourth shift registers, respectively, the scanning direction can be inverted up, down, left, and right. Can be easily flipped.

In another aspect of the driving circuit of the electro-optical device according to the present invention, the substrate has an image display area in a central portion on the substrate,
The first and second shift registers of the data line driving circuit are arranged on one side of the periphery on the substrate.

According to this aspect, since the first and second shift registers are provided on one side of the substrate, the wiring for the sampling circuit drive signal and the wiring from the image signal line to the data line via the sampling switch can be made compact. A stored planar layout is obtained. Further, it is effective in reducing the deterioration of the image signal in the wiring portion from the image signal line to the data line.

In another aspect of the driving circuit of the electro-optical device according to the present invention, an image display area is provided at a central portion on the substrate, and the data line driving circuit and the sampling circuit are partially provided on the substrate. The other part is provided in one peripheral area of the image display area, and the other part is provided in the other peripheral area on the substrate opposite to the one peripheral area with the image display area interposed therebetween.

According to this aspect, the data line driving circuit and the sampling circuit can be arranged around the image display area in a well-balanced manner. In particular, if a configuration is adopted in which these circuit portions related to odd-numbered data lines are arranged in one peripheral region and those circuit portions related to even-numbered data lines are arranged in the other peripheral region, the pitch of the data lines can be reduced. Since these circuits may be formed at twice the pitch, it is advantageous in narrowing the data line pitch and miniaturizing pixels.

Alternatively, an image display area is provided in a central portion on the substrate, and the scanning line drive circuit is partially provided in one peripheral area of the image display area on the substrate, and is provided in another portion. Is provided in the other peripheral region on the substrate, which is opposed to the one peripheral region with the image display region interposed therebetween.

With this configuration, it is possible to arrange the scanning line driving circuits around the image display area in a well-balanced manner. In particular, if the circuit portion related to the odd-numbered scanning lines is arranged in one peripheral region and the circuit portion related to the even-numbered scanning lines is arranged in the other peripheral region, the arrangement pitch of the scanning lines is 2 Since this circuit may be formed at twice the pitch, it is advantageous in narrowing the arrangement pitch of the scanning lines to achieve finer pixels.

In order to solve the above-mentioned problems, the electro-optical device according to the present invention incorporates the driving circuit of the electro-optical device according to the above-described various aspects of the present invention.

According to the electro-optical device of the present invention, since the above-described drive circuit of the present invention is built in, the same serial-parallel-converted image signal is supplied from an external image signal processing circuit while driving. By the switching operation on the circuit side, the horizontal scanning direction can be reversed left and right. Therefore,
Using an existing image signal processing circuit, an electro-optical device system capable of inverting a display image can be constructed.

In one aspect of the electro-optical device of the present invention, the plurality of pixel electrodes arranged in a matrix on the substrate and the plurality of scanning lines and the plurality of data lines are respectively connected to the substrate. A plurality of thin film transistors for selectively supplying the image signals to a plurality of pixel electrodes in accordance with the scanning signals.

According to this aspect, it is possible to realize an electro-optical device with a built-in driving circuit of a TFT active matrix driving system, which can easily invert a display image subjected to serial-parallel conversion.

The operation and other advantages of the present invention will become more apparent from the embodiments explained below.

[0051]

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

(First Embodiment of Electro-Optical Device) A first embodiment of an electro-optical device according to the present invention, which comprises, for example, a liquid crystal device, will be described with reference to FIGS.

First, the configuration of the electro-optical device in the image display area will be described with reference to FIG. Figure 1 here
Is an equivalent circuit of various elements, wiring, and the like in a plurality of pixels formed in a matrix forming an image display area of the electro-optical device.

In FIG. 1, a plurality of pixels formed in a matrix and constituting an image display area of the electro-optical device according to the present embodiment have TFTs for controlling a pixel electrode 9a.
A plurality of pixels 30 are formed in a matrix, and the data line 6a to which an image signal is supplied is electrically connected to the source of the TFT 30. The image signals S1, S2,..., Sn to be written to the data lines 6a may be supplied line-sequentially in this order, or may be supplied to a plurality of adjacent data lines 6a for each group. good. Also,
The scanning lines 3a are electrically connected to the gates of the TFTs 30, and are configured to apply the scanning signals G1, G2,... ing. The pixel electrode 9a is a TFT3
., Sn supplied from the data line 6a are written at a predetermined timing by closing the switch of the TFT 30 as a switching element for a predetermined period. .
The image signals S1, S2,..., Sn of a predetermined level written to the electro-optical material via the pixel electrodes 9a are held for a certain period of time between the counter electrodes (described later) formed on the counter substrate (described later). Is done. The electro-optical material is made of, for example, liquid crystal, and changes the orientation and order of the molecular assembly according to the applied voltage level, thereby modulating light and enabling gradation display. In the normally white mode, the incident light cannot pass through the electro-optical material portion according to the applied voltage. In the normally black mode, the incident light does not pass through the electro-optical material according to the applied voltage. Light having a contrast according to an image signal is emitted from the electro-optical device as a whole, which can pass through the optical material portion. here,
In order to prevent the held image signal from leaking, a storage capacitor 70 is added in parallel with the electro-optical material capacitor formed between the pixel electrode 9a and the counter electrode. For example, the voltage of the pixel electrode 9a is held by the storage capacitor 70 for a time that is three orders of magnitude longer than the time during which the source voltage is applied. Thereby, the holding characteristics are further improved, and an electro-optical device having a high contrast ratio can be realized.

Next, the configuration and operation of the driving circuit of the electro-optical device provided around the image display area will be described with reference to FIGS. FIG. 2 is a block diagram showing the electro-optical device according to the present embodiment including a driving circuit, an image signal line, and the like provided on the substrate. FIG. 3 is a timing chart of various signals in the data line driving circuit. It is a chart.

In FIG. 2, the driving circuit according to the present embodiment includes a data line driving circuit 101 and a scanning line driving circuit 104.
And a sampling circuit 301. In FIG. 2,
The capacitance line 3b shown in FIG. 1 is omitted for convenience.

The data line drive circuit 101 includes a shift register 101R for right shift (right direction from left to right) and a shift register 101L for left shift (left direction from right to left). By selectively operating these shift registers 101R or 101L, the sampling circuit driving signals XR1 and XR1 are transmitted from the shift register 101R to the sampling circuit 301.
, XRn are sequentially supplied in the right direction, or the sampling circuit drive signals XL1, XL2,.
n are sequentially supplied to the left through the sampling circuit drive signal line 116.

The sampling circuit 301 converts the serial-parallel converted six image signals VID1 to VI supplied to the six image signal lines 115 (NO.1 to NO.6).
D6 is composed of a plurality of sampling switches 302R and 302L that sample D6 in accordance with a sampling circuit drive signal XRi or XLi (where i = 1, 2,..., N) and supply the data to a plurality of data lines 6a. I have. In the present embodiment, the image signals VID1 to VID6 subjected to the serial-parallel conversion may be color image signals or monochrome image signals.

The scanning line driving circuit 104 includes a plurality of scanning lines 3
.., Gm are supplied to a.

The plurality of sampling switches 302 R
It is driven by the sampling circuit drive signal XRi supplied from the shift register 101R. On the other hand, the plurality of sampling switches 302L are provided in the shift register 101L.
Is driven by the sampling circuit drive signal XLi supplied from the controller. The output terminal of each sampling switch 302R and the output terminal of each sampling switch 302L are
Each of the plurality of data lines 6a is connected in parallel. In particular, the i-th sampling switch 302R in the right direction (where i is a natural number) and the i-th sampling switch 302L in the left direction are connected to the same image signal line 115 (that is, the same 1 out of 6 lines). Book). For example, the leftmost (first to the right) sampling switch 302R is connected to the image signal line (NO. 1) to which the image signal VID1 is supplied, and the rightmost (first to the left) sampling switch 302L is also connected. , An image signal line (NO.1) to which the image signal VID1 is also supplied.
Are connected to the sampling switches 302R and 3R.
02L is symmetrically connected to the six image signal lines 115.

In the above-described configuration, six image signals VID1 to VID6 that have been subjected to serial-parallel conversion from an external image signal processing circuit are supplied to six image signal lines 115. Scanning line 3
Scan signals G1, G2,..., Gm are supplied to a.

Here, as a first case, if a start signal DX-R as an example of a selection signal for starting the transfer operation of the shift register 101R is supplied from an external image signal processing circuit or control circuit, the shift register 101R 1
01R starts the transfer operation based on the horizontal scanning reference clock signal CLX and its inverted signal CLX '. Then, the sampling circuit drive signal XRi is sequentially output to the right with respect to the arrangement of the plurality of sampling switches 302R via each sampling circuit drive signal line 116 (see FIG. 3A). As a result, according to the sampling circuit drive signal XRi, the sampling switch 302R
Is driven, and the serial-parallel-converted image signals VID1 to VID supplied to the plurality of image signal lines 115 are driven.
6 are sampled. Each data line 6a connected to the output terminal of each sampling switch 302R
Are supplied with sampled image signals VID1 to VID6.

Alternatively, as a second case, if a start signal DX-L as an example of a selection signal for starting the transfer operation of the shift register 101L is supplied from an external image signal processing circuit or control circuit, the shift register 1
01L is the reference clock signal CLX and its inverted signal C
The transfer operation is started based on LX '. Then, the sampling circuit drive signal XLi is transmitted to the plurality of sampling switches 3 via each sampling circuit drive signal line 116.
The output is sequentially performed to the left in the array of 02L (see FIG. 3).
(B)). As a result, the sampling circuit drive signal X
The sampling switch 302 </ b> L is driven in accordance with Li, and the serial signal supplied to the plurality of image signal lines 115 is output.
The parallel-converted image signals VID1 to VID6 are sampled. Then, each sampling switch 30
The sampled image signals VID1 to VID6 are supplied to each data line 6a connected to the 2L output terminal.

As described above, in the present embodiment, i
Since the i-th sampling switch 302R and the i-th sampling switch 302L in the left direction are connected to the same image signal line 115, the shift register 10R
1R to operate the sampling circuit drive signal X in the right direction.
In the case where Ri is sequentially supplied and the case where the shift register 101L is operated to sequentially supply the sampling circuit drive signal XLi in the left direction, each sampling switch 302R is connected to the same data line 6a counted from both ends.
Alternatively, image signals VID1 to VID6 from the same image signal line 115 are supplied via 302L. Therefore, the start signal DX-R or DX-L does not need to be changed as shown in FIG. 14 in the order of each image signal for each image signal line 115 in the plurality of serial-parallel converted image signals VID1 to VID6. Is supplied to the data line driving circuit 101 to operate the shift register 101R or shift register 101R.
The horizontal scanning direction is reversed left and right depending on whether L is operated. Thereby, the display image can be reversed left and right.

On the other hand, the scanning line driving circuit 104 is provided with two unidirectional shift registers or bidirectional shift registers whose scanning directions are downward and upward, respectively, and is configured to be able to vertically invert the vertical scanning direction. Have been. That is, the scanning signals G1, G2, which are simply supplied to the respective scanning lines 3a sequentially.
When the supply order of Gm is inverted up and down by the shift register, the vertical scanning direction can be inverted up and down. More specifically, the transfer operation of the shift register for down shift of the two unidirectional shift registers included in the scanning line driving circuit 104 or the downward operation (down shift) of one bidirectional shift register If a start signal DY-D for starting the transfer operation is supplied from an external image signal processing circuit or the like,
The shift register starts a transfer operation based on the reference clock signal CLY for vertical scanning and its inverted signal CLY ′. As a result, the transfer signals are scanning signals G1, G2,
, Gm are sequentially output in the downward direction. Alternatively, a transfer operation of an upward shift register of two unidirectional shift registers included in the scanning line driving circuit 104 or an upward direction (upward shift) of one bidirectional shift register
Start signal DY- for starting the transfer operation of
When U is supplied from an external image signal processing circuit or the like, this shift register starts a transfer operation based on the reference clock signal CLY and its inverted signal CLY ′. As a result, the transfer signals are the scan signals G1, G2,.
The data is sequentially output upward.

As a result, the data line driving circuit 101 and the scanning line driving circuit 104 do not involve the operation burden on the external image signal processing circuit side of replacing the image signals VID1 to VID6 with the image signal line 115.
By performing a relatively simple operation of switching the shift register on the side of, the displayed image can be inverted left and right or up and down. Therefore, even if the same circuit as the existing image signal processing circuit for the electro-optical device having no scanning direction reversing function is used, the reversal of the displayed image can be realized, thereby simplifying the hardware configuration and signal processing control of the entire device. It is very convenient for planning. In addition, each sampling switch 3
02R and each sampling switch 302L are connected in parallel, so that the image signals VID1 to VID
The number of sampling switches interposed between the image signal line 115 and the data line 6a for ID6 is one each as in the related art.
In addition to this, no additional switch is required during this time. Therefore, it is not necessary to unnecessarily increase the impedance of the wiring and the element portion from the image signal line 115 to the data line 6a as compared with the related art. This is advantageous from the viewpoint of suppressing the deterioration of the image signal, that is, from the viewpoint of improving the quality of the displayed image.

In this embodiment, in particular, the sampling switches 302R and the sampling switches 302L are alternately arranged in the X direction, and a pair of adjacent sampling switches 302R and 302L are connected to the same data line 6a. Have been. In this manner, the sampling switches 302R and 302L are regularly and alternately arranged, and the wiring for the sampling circuit drive signal and the wiring from the image signal line 115 to the data line 6a via the sampling switches 302R and 302L are compactly accommodated. The resulting planar layout is obtained. The adoption of this compact and flat layout in which the lengths and intersections of the wirings are minimized requires that the image signals VID1 to VID in the wiring portion from the image signal line 115 to the data line 6a be formed.
6 is very effective in reducing deterioration (mixing of noise).

In this embodiment, the data line driving circuit 101, the scanning line driving circuit 104, and the sampling circuit 3
01 is formed on one of a pair of substrates sandwiching an electro-optical material such as a liquid crystal as described later,
The electro-optical device is constructed as a drive circuit built-in type. Therefore, according to the present embodiment, a display image can be easily inverted right and left on the electro-optical device side without making any change on the image signal processing circuit side for the image signal to be input from the outside. An electro-optical device with a built-in drive circuit can be realized.

Furthermore, in the present embodiment, one of the shift registers 101R and 101L is configured to selectively operate according to start signals DX-R and DX-L, which are examples of a selection signal. By disabling the non-selected shift register, power consumption in the data line driver circuit 101 can be reduced,
Eventually, power consumption of the entire driving circuit can be reduced.

Here, two specific examples of the configuration of the shift register 101R that selectively operates as described above will be described with reference to FIGS. Here, FIG.
FIG. 4B is a configuration example without a phase correction circuit, and FIG.
Is a configuration example including a phase correction circuit. Further, the specific configuration of the shift register 101L is symmetrical to the shift register 101R, so that a specific description thereof is omitted. FIG. 5 is a timing chart of a transfer signal and the like when the phase correction circuit is used, and FIG.
FIG. 3 is a circuit diagram of a clocked inverter forming a shift register.

As shown in FIG. 4A, an example of the shift register 101L outputs a transfer signal for each stage based on the clock signal CLX and its inverted signal CLX 'and transfers the transfer signal to the next stage. An inverter 401 and an inverter 402 and a clocked inverter 403 for feeding back a transfer signal from the next stage are provided. The transfer signal output from each stage of the shift register 101L is a NAND
The data is input to each buffer circuit 500 including a circuit 501 and an inverter 502 and supplied to each data line (see FIG. 2) via each buffer circuit 500. With the buffer circuit 500 interposed, it is possible to drive a sampling switch having a relatively low impedance by a shift register configured using relatively small-sized transistors.

As shown in FIG. 4B, another example of the shift register 101L is different from the example of FIG. 4A in that the phase correction circuit is provided between the output terminal of the transfer output of each stage and the buffer circuit. 600 is provided. Other configurations are the same as those in the example of FIG. 4A, and therefore, are denoted by the same reference numerals and description thereof will be omitted. The phase correction circuit 600 includes a NAND circuit 601 and an inverter 602
As shown in FIG. 5, the pulse width of the transfer signal output from each stage and having the same pulse width as the clock signal CLX is changed by the phase correction signals ENB1 and ENB2, respectively.
(The pulse width of the odd-numbered sampling circuit drive signal is limited by the phase correction signal ENB1 and the pulse width of the even-numbered sampling circuit drive signal is limited by the phase correction signal ENB2). It is configured to output as drive signals XR1, XR2, XR3,. As a result, the sampling circuit drive signals XRi and XRi + 1 output in succession are output.
Some time margin Δτ will be placed between them. Therefore, according to the example of the shift register circuit 101R, the sampling switch 302R that is to be driven in succession overlaps with the rising of the sampling circuit driving signal XRi and the falling of the sampling circuit driving signal XRi + 1. The ON state is set, and the occurrence of crosstalk between the image signals sampled at this time and the occurrence of ghost in the display image can be prevented beforehand. Further, the NAND circuit of FIG.
If a three-terminal NAND circuit controlled by a terminal is used and a phase correction signal is supplied to the surplus input terminal, FIG.
The same drive can be performed. This is advantageous because only one phase correction signal and one supply line are required.

Next, FIG. 6 shows a specific circuit configuration of the clocked inverter constituting each example of the shift register circuit 101R shown in FIGS. 4A and 4B. FIG. 6A is a symbolic diagram of one clocked inverter, and FIG. 6B is a circuit diagram thereof.

As shown in FIG. 6B, the clocked inverter includes an N-channel type TFT to which a clock signal CL is inputted to a gate and a P-type TFT to which an inverted signal CL 'thereof is inputted.
A channel type TFT, a P-channel type TFT and an N-channel type TFT connected in parallel such that a transfer signal is input to a gate, and a power source VSS (ground potential power source) and V
DD (high-level power supply) is connected as shown in the figure. Thus, each clocked inverter is connected to the power supply V
Since SS and VDD are required, it is necessary to route the power supply wiring to each clocked inverter also in the entire shift register shown in FIGS. Further, in each clocked inverter, since the input terminal and the output terminal are insulated by the gate insulating film of each TFT, there is an advantage that even if the frequency of the transfer signal is high, the current does not leak in the transfer direction. is there. Accordingly, the shift register as a whole has an advantage that a stable transfer signal can be output with respect to a high frequency.

As shown in FIG. 2, the common clock signal CLX and its inverted signal CLX 'are both supplied to the shift registers 101R and 101L described above. For this reason, it is possible to simplify the pattern of the clock signal wiring routed in the data line driving circuit 101 for the shift registers 101R and 101L. However,
In the data line driving circuit 101, the shift register 10
Separate clock signals CLX for 1R and 101L
−R and its inverted signal CLX-R ′ and the clock signal CLX-L and its inverted signal CLX-L ′ may be supplied, respectively. With this configuration, the sampling switch 302 is provided by one shift register.
When driving the R or 302L, even if the operation of the other shift register is stopped for each clock signal supplied to it, the operation of one shift register does not hinder at all. Therefore, power consumption of the data line driver circuit 101 can be reduced by making unnecessary shift registers inactive together with the clock signal.

Next, the sampling circuit 30 shown in FIG.
1 sampling switches 302R and 302
The specific circuit configuration of L is shown in the circuit diagrams of FIGS. 7 (1), (2) and (3), respectively.

That is, as shown in FIG. 7A, the sampling switch may be constituted by an N-channel TFT 302a, or as shown in FIG.
It may be composed of the FT 302b, or may be composed of the complementary TFT 302c as shown in FIG.
7A to 7C, the image signal VID input via the image signal line 115 shown in FIG.
Is input to each of the TFTs 302a to 302c as a source voltage. Data line driving circuit 101 also shown in FIG.
The sampling circuit drive signal XRi (XLi) or its inverted signal XRi ′ (XLi ′) is input to each of the TFTs 302a to 302c as a gate voltage. The sampling circuit drive signal XRi (XLi) applied as a gate voltage to the N-channel TFT 302a and the sampling circuit drive signal XRi '(XLi') applied as a gate voltage to the P-channel TFT 302b are mutually inverted. Signal. Therefore, when the sampling switch is constituted by the complementary TFT 302c, the sampling circuit drive signals XRi (XLi) and XRi '(XL
At least two or more sampling circuit drive signal lines 116 for i ′) are required. Each sampling switch is preferably composed of an N-channel type, a P-channel type, a complementary type, or the like, which can be manufactured by the same manufacturing process as the TFT in the pixel portion from the viewpoint of manufacturing efficiency and the like.

As described in detail above, according to the electro-optical device of the present embodiment, the data line driving circuit 101 and the data line driving circuit 101 are supplied while the same serial-parallel converted image signal is supplied from the external image signal processing circuit. By the switching operation on the scanning line driving circuit 104 side, the scanning direction can be reversed left and right or up and down.

(Second Embodiment of Electro-Optical Device) A second embodiment of the electro-optical device according to the present invention, which comprises, for example, a liquid crystal device, will be described with reference to FIG. I do. FIG. 8 is a block diagram of the data line driving circuit and the sampling circuit. FIG.
1 to 7 in the second embodiment shown in FIG.
The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 8, the second embodiment differs from the first embodiment in that one sampling circuit drive signal XR
i or XLi, the six adjacent sampling switches 30 connected to the six image signal lines 115, respectively.
The difference is that 2R or 6 sampling switches 302L are simultaneously driven. That is, the first
In the embodiment, the sampling switches 302R and 30R
The 2L sampling method is a method of sequentially sampling one by one, but in the second embodiment, the serial-parallel converted image signals VID1 to VID6 are
A method of simultaneously sampling a number equal to the number of serial-parallel conversions is adopted.

More specifically, in FIG. 8, six sampling switches 302R are connected in parallel to one sampling circuit drive signal line 116 'from the shift register 101R, and one sampling switch 302L from the shift register 101L. Six sampling switches 302L are connected in parallel for each of the sampling circuit drive signal lines 116 '.

As described above, in the electro-optical device according to the second embodiment, since six data lines are simultaneously driven, the time for sampling each image signal can be longer than in the case of sequentially driving one data line at a time. As a result, it is possible to perform sampling even if the capabilities of the sampling switches 302R and 302L are low, which is advantageous.

The plurality of image signal lines 115 are generally arranged on the substrate as a group of signal lines extending in parallel with each other (see FIGS. 2 and 8). The arrangement order toward the side may be the same as the arrangement order in the plurality of data lines to which these are supplied, but is generally arbitrary.

That is, as shown in FIG. 9A, as in the first and second embodiments, the image signals VID1 to VID
6 may be arranged in the order of the arrangement of the data lines, or as shown in FIG.
Each image signal line 1 for supplying image signals VID1 to VID6
15 'may be arranged in the reverse order to the arrangement order of the data lines, or, as shown in FIG.
The order of the image signal lines 115 "for supplying ID1 to VID6 may be arranged in the order in which the arrangement order of the data lines is appropriately changed. In any case, the image connected to the arrangement of the sampling switches 302R. As long as the order of the signal lines and the order of the image signal lines connected to the array of the sampling switches 302L are symmetrical, the effects unique to the above-described embodiments can be obtained.

In the above embodiment, the image signal lines are
Although the use of the book has been described as an example, the present invention is not limited to this.
It is also possible to appropriately increase the number of image signal lines to a natural number such as two or twenty-four.

(Overall Configuration of Electro-Optical Device) The overall configuration of each embodiment of the electro-optical device configured as described above, for example, a liquid crystal device will be described with reference to FIGS. 10 and 11. FIG. FIG. 10 is a plan view of the TFT array substrate 10 together with the components formed thereon viewed from the counter substrate 20 side. FIG. It is H 'sectional drawing.

In FIGS. 10 and 11, the electro-optical device includes a TFT array substrate 10 and a counter substrate 20 which are arranged to face each other.
The pixel electrode 9a, the data line driving circuit 101, the scanning line driving circuit 104, and the scanning lines described with reference to FIG.
Data lines, TFTs and the like are formed. An electro-optical material is sealed in a space surrounded by a sealing material 52 between the TFT array substrate 10 and the opposing substrate 20 in which the pixel electrode 9a and the opposing electrode 21 are arranged to face each other. 50 are formed. The electro-optical material layer 50 assumes a predetermined alignment state by the alignment films formed on the surfaces facing the electro-optical material layer 50 of both substrates in a state where the electric field from the pixel electrode 9a is not applied. Electro-optic material layer 50
Is composed of, for example, an electro-optical material in which one or several kinds of nematic electro-optical materials are mixed. The sealing material 52 is made of T
An adhesive made of, for example, a photo-curing resin or a thermosetting resin for bonding the FT array substrate 10 and the counter substrate 20 around the periphery thereof, and a glass fiber or a glass fiber for setting a distance between both substrates to a predetermined value. Spacers such as glass beads are mixed.

The opposing substrate 20 may be provided with a light-shielding film in a region other than the opening region of each pixel, or may be formed on the TFT array substrate 10. Therefore, the opposing substrate 20
Does not enter the pixel switching TFT from the side of. Further, the light-shielding film has functions such as improvement of contrast and prevention of color mixture of coloring materials.

Further, on the TFT array substrate 10, a light shielding film 53 as a frame made of the same or different material from the above-mentioned light shielding film is provided in parallel with the inside of the sealing material 52.

Further, the data line drive circuit 101 and the external circuit connection terminal 102
The scanning line driving circuit 104 is provided along one side of the FT array substrate 10, and is provided along two sides adjacent to the one side. If the delay of the scanning signal supplied to the scanning line 3a does not matter, it goes without saying that the scanning line driving circuit 104 may be provided on only one side. Further, the data line driving circuits 101 may be arranged on both sides along the side of the image display area.

As shown in FIG. 12, for example, the odd-numbered data lines 6a are supplied from a data line drive circuit including a right shift shift register 101Ra and a left shift shift register 101La disposed along the upper side of the image display area. The image signal is supplied, and the data lines of the even-numbered columns are shifted to the right shift register 101 arranged along the lower side of the image display area.
An image signal may be supplied from a data line driving circuit including Rb and the left shift register 101Lb. If the wiring and the circuit configuration for supplying the image signal to the data line 6a are vertically comb-shaped, the area occupied by the data line driving circuit can be expanded, so that a complicated circuit can be formed. It becomes possible. In other words, by adopting a configuration in which these circuit parts related to the odd-numbered data lines 6a are arranged in one peripheral area and those circuit parts related to the even-numbered data lines 6a are arranged in the other peripheral area, Since these circuits may be formed at a pitch twice as large as the arrangement pitch of the data lines 6a, the arrangement pitch of the data lines 6a is narrowed, which is advantageous in miniaturizing pixels.

In FIGS. 10 and 11, a plurality of wirings 105 for connecting the scanning line driving circuits 104 provided on both sides of the image display area are provided on the remaining side of the TFT array substrate 10. In at least one of the corners of the opposing substrate 20, a conductive material 106 for establishing electric conduction between the TFT array substrate 10 and the opposing substrate 20 is provided. The sampling circuit 301 shown in FIG. 2 and FIG. 8 is provided on the TFT array substrate 10 at a position hidden under the frame 53 in FIG.

In each of the embodiments, the data line driving circuit 101 and the sampling circuit 301 are partially provided in one peripheral area of the image display area, and are provided in the other peripheral area opposite to the other. May be provided. With this configuration, the data line driving circuit 101 and the sampling circuit can be arranged around the image display area with good balance. Similarly, the scanning line driving circuit 104
May be partially provided in one peripheral area of the image display area, and another part may be provided in the other peripheral area opposite to the one. This configuration is advantageous in reducing the arrangement pitch of the data lines 6a and the arrangement pitch of the scanning lines 3a to achieve finer pixels.

The TFT array substrate 10 of the electro-optical device according to each embodiment described above with reference to FIGS.
Further, a precharge circuit for writing a precharge signal of a predetermined potential at a timing preceding the image signal may be formed for each data line 6a in order to reduce a load of writing the image signal to the data line 6a, An inspection circuit or the like for inspecting the quality, defects, and the like of the electro-optical device during manufacturing or shipping may be formed. Also, the data line driving circuit 1
01, instead of providing a part or all of the peripheral circuits such as the scanning line driving circuit 104 on the TFT array substrate 10, for example, a driving LSI mounted on TAB (Tape Automated Bonding) May be electrically and mechanically connected via an anisotropic conductive film provided in the peripheral portion of.

In each of the above embodiments, JP-A-9-127497, JP-B-3-52611, JP-A-3-125123, and JP-A-8-171.
As disclosed in Japanese Patent Application Laid-Open No. 101-101, etc., a position facing the TFT 30 on the TFT array substrate 10 (that is,
A light-shielding film made of, for example, a refractory metal may be provided also on the TFT 30). If the light-shielding film is also provided below the TFT 30, the return light and the like from the TFT array substrate 1 side can be prevented from being incident on the TFT 30.

Further, on the side of the opposite substrate 20 where the projected light is incident and on the side where the emitted light of the TFT array substrate 10 is emitted, for example, a TN (twisted nematic) mode, an STN (super TN) mode, a D- STN
A polarizing film, a retardation film, a polarizing plate, and the like are arranged in a predetermined direction according to an operation mode such as a (double-STN) mode and a normally white mode / normally black mode.

Since the electro-optical device in each of the embodiments described above is applied to a color projector, three electro-optical devices are used as light valves for RGB, and each panel has an RGB color valve. The light of each color decomposed via the dichroic mirror is respectively incident as projection light. Therefore, in the embodiment, the opposing substrate 20 is not provided with a color filter. However, the pixel electrode 9 on which the light shielding film 23 is not formed
An RGB color filter may be formed on the opposing substrate 20 together with the protective film in a predetermined area opposing to a. In this way, the electro-optical device according to the embodiment can be applied to a color electro-optical device such as a direct-view or reflective color liquid crystal television other than the projector. Further, the counter substrate 2
A micro lens may be formed so as to correspond to one pixel on 0. With this configuration, a bright electro-optical device can be realized by improving the efficiency of collecting incident light. Furthermore, a dichroic filter that produces RGB colors using light interference may be formed by depositing a number of interference layers having different refractive indexes on the counter substrate 20.
According to the counter substrate with the dichroic filter, a brighter color electro-optical device can be realized.

The switching element provided in each pixel may be a normal stagger type or coplanar type polysilicon TFT, but may be applied to other types of TFTs such as a reverse stagger type TFT and an amorphous silicon TFT. Each embodiment is effective.

(Electronic Apparatus) Next, an embodiment of an electronic apparatus equipped with the electro-optical device described in detail above will be described with reference to FIG.
This will be described with reference to FIGS.

First, FIG. 15 shows a schematic configuration of an electronic apparatus including the liquid crystal device 100 as an example of the electro-optical device.

In FIG. 15, the electronic equipment includes a display information output source 1000, a display information processing circuit 1002, and a drive circuit 1.
004, a liquid crystal device 100, a clock generation circuit 1008, and a power supply circuit 1010. The display information output source 1000 includes a ROM (Read Only Memory),
It includes a memory such as an AM (Random Access Memory), an optical disk device, and a tuning circuit that tunes and outputs an image signal, and displays display information such as an image signal in a predetermined format based on a clock signal from a clock generation circuit 1008. Output to the information processing circuit 1002. The display information processing circuit 1002 includes various known processing circuits such as an amplification / polarity inversion circuit, a serial-parallel conversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit. Digital signals are sequentially generated from the display information and output to the drive circuit 1004 together with the clock signal CLK. The drive circuit 1004 drives the liquid crystal device 100. The power supply circuit 1010 supplies a predetermined power to each of the above-described circuits. Note that the drive circuit 1004 may be mounted on the TFT array substrate included in the liquid crystal device 100, and in addition, the display information processing circuit 1002 may be mounted.

Next, FIGS. 16 to 17 show specific examples of the electronic apparatus configured as described above.

In FIG. 16, a liquid crystal projector 1100, which is an example of an electronic device, prepares three liquid crystal display modules each including the liquid crystal device 100 in which the above-described driving circuit 1004 is mounted on a TFT array substrate, and each of them has a light source for RGB. The projector is used as the bulbs 100R, 100G, and 100B. In the liquid crystal projector 1100, when projection light is emitted from a lamp unit 1102 of a white light source such as a metal halide lamp, three mirrors 1106 and two dichroic mirrors 11 are provided.
08, light components R corresponding to the three primary colors of RGB,
Light valve 100 divided into G and B and corresponding to each color
R, 100G and 100B, respectively. At this time, in particular, the B light is used to prevent light loss due to a long optical path, so that the input lens 1122, the relay lens 1123, and the output lens 11
24, through a relay lens system 1121. Then, the light valves 100R, 100G and 10
The light components corresponding to the three primary colors, each modulated by 0B,
After being recombined by the dichroic prism 1112, it is projected as a color image on the screen 1120 via the projection lens 1114.

In FIG. 17, a laptop personal computer 1200 corresponding to multimedia, which is another example of electronic equipment, has the above-described liquid crystal device 100 provided in a top cover case.
A main body 1204 accommodating a modem or the like and incorporating a keyboard 1202 is provided.

In addition to the electronic devices described above with reference to FIGS. 16 to 17, a liquid crystal television, a viewfinder type or a monitor direct-view type video tape recorder, a car navigation device, an electronic organizer, a calculator, a word processor, an engineering machine, etc. A workstation (EWS), a mobile phone, a video phone, a POS terminal, a device having a touch panel, and the like are examples of the electronic apparatus shown in FIG.

As described above, according to the present embodiment, it is possible to realize various electronic apparatuses having a liquid crystal device capable of displaying high-quality images with high manufacturing efficiency.

[0107]

According to the present invention, the image signal processing circuit which supplies the serial-parallel-converted image signal through a plurality of image signal lines can easily display the image while supplying the same image signal. Can be reversed. In other words, a relatively simple switching operation on the drive circuit side of the electro-optical device can be performed without causing the operation load on the external image signal processing circuit side of the image signal exchange operation on the image signal line, to display the displayed image. It can be flipped left and right or up and down. Therefore, even if the same circuit as the existing image signal processing circuit for the electro-optical device having no scanning direction reversing function is used, the reversal of the displayed image can be realized, thereby simplifying the hardware configuration and signal processing control of the entire device. It is very convenient for planning.

[Brief description of the drawings]

FIG. 1 is an equivalent circuit of various elements, wiring, and the like provided in a plurality of pixels in a matrix forming an image display area in a first embodiment of an electro-optical device.

FIG. 2 is a block diagram illustrating an overall circuit configuration including a drive circuit in the first embodiment of the electro-optical device.

3 is a timing chart of various signals in each shift register included in the data line driving circuit shown in FIG.

FIG. 4 is a circuit diagram showing a specific configuration example of each shift register included in the data line driving circuit shown in FIG. 2;

FIG. 5 is a timing chart of various signals in the shift register shown in FIG.

FIG. 6 is a detailed circuit diagram of a clocked inverter included in the configuration example of the shift register shown in FIG.

FIG. 7 is a circuit diagram showing various configuration examples of a sampling switch included in the sampling circuit shown in FIG. 2;

FIG. 8 is a block diagram of a data line drive circuit in a second embodiment of the electro-optical device.

FIG. 9 is a wiring diagram illustrating various specific examples of a connection method between an image signal line and a sampling switch in each embodiment of the electro-optical device.

FIG. 10 is a plan view of a TFT array substrate in each embodiment of the electro-optical device together with components formed thereon viewed from a counter substrate side.

11 is a sectional view taken along the line H-H 'of FIG.

FIG. 12 is a block diagram of a data line driving circuit according to a modification of the electro-optical device.

FIG. 13 is a conceptual diagram showing a prism optical system of the projector that combines RGB three-color lights.

FIG. 14 is a conceptual diagram showing a method of exchanging image signals necessary for inverting a display image based on serial-parallel-converted image signals.

FIG. 15 is a block diagram showing a schematic configuration of an embodiment of an electronic device according to the present invention.

FIG. 16 is a cross-sectional view illustrating a liquid crystal projector as an example of an electronic apparatus.

FIG. 17 is a front view illustrating a personal computer as another example of the electronic apparatus.

[Explanation of symbols]

 3a scanning line 3b capacitance line 6a data line 9a pixel electrode 10 TFT array substrate 20 counter substrate 21 counter electrode 30 pixel switching TFT 50 electro-optical material layer 52 sealing material 53 light shielding film 70 ... Storage capacitor 101. Data line drive circuit 101R, 101L... Shift register 104. Scan line drive circuit 115. Image signal line 116. Sampling circuit drive signal line 301... Sampling circuit 302R, 302L. Correction circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 3/20 680 G09G 3/20 680C 3/36 3/36

Claims (17)

[Claims] A plurality of sampling switches for sampling serial-parallel image signals supplied to a plurality of image signal lines in accordance with a sampling circuit drive signal and supplying the sampled signals to the plurality of data lines, respectively; And a data line drive circuit for supplying the sampling circuit drive signal to the sampling circuit, wherein the data line drive circuit is arranged in a predetermined direction with respect to the arrangement of the plurality of sampling switches. A first shift register that sequentially outputs the sampling circuit drive signal, and a second shift register that sequentially outputs the sampling circuit drive signal in a direction opposite to the predetermined direction with respect to the arrangement of the plurality of sampling switches, The plurality of sampling switches are supplied from the first shift register. Each of the sampling switches included in the first group is divided into a first group driven by a sampling circuit drive signal and a second group driven by a sampling circuit drive signal supplied from the second shift register. Output terminal and the second
An output terminal of each sampling switch included in the group is connected in parallel to each of the plurality of data lines. 2. An electro-optical device for driving an electro-optical device having a plurality of data lines and a plurality of scanning lines intersecting an electro-optical material between a pair of substrates. A sampling circuit comprising: a plurality of sampling switches for sampling a serial-parallel-converted image signal supplied to a plurality of image signal lines in accordance with a sampling circuit drive signal and supplying the sampled signals to the plurality of data lines, respectively. And a data line drive circuit for supplying the sampling circuit drive signal to the sampling circuit. The data line drive circuit drives the sampling circuit in a predetermined direction with respect to the arrangement of the plurality of sampling switches. A first shift register for sequentially outputting signals; and a predetermined shift register for the arrangement of the plurality of sampling switches. A second shift register for sequentially outputting the sampling circuit drive signal in a direction opposite to the first direction, wherein the plurality of sampling switches include a first group driven by a sampling circuit drive signal supplied from the first shift register. , A second group driven by a sampling circuit drive signal supplied from the second shift register, and an output terminal of each sampling switch included in the first group and the second group.
An output terminal of each sampling switch included in the group is connected in parallel to each of the plurality of data lines. 3. An i-th sampling switch (where i is a natural number) in the predetermined direction in the first group and an i-th sampling switch in the opposite direction in the second group are the same image signal line. The driving circuit for an electro-optical device according to claim 1, wherein the driving circuit is connected to the driving circuit. 4. The sampling switches belonging to the first group and the sampling switches belonging to the second group are alternately arranged along the predetermined direction, and belong to the first and second groups, respectively. The driving circuit for an electro-optical device according to any one of claims 1 to 3, wherein a pair of adjacent sampling switches are connected to the same data line. 5. The image signal lines are composed of n lines (n is a natural number), the order of the n image signal lines connected to adjacent n lines of the first group, and the second group The order of the n image signal lines that are connected to the adjacent n of the image signal lines is right and left and right and right. 5. The method according to claim 1, wherein Electro-optical device. 6. One sampling circuit drive signal line for supplying a sampling circuit drive signal from the first shift register is connected in parallel to adjacent n sampling switches of the first group, and 6. The electro-optical device according to claim 5, wherein one sampling circuit driving signal line for supplying a sampling circuit driving signal from a register is connected in parallel to the adjacent n sampling switches of the second group. . 7. The driving circuit for an electro-optical device according to claim 1, wherein the driving circuit is formed on the substrate. 8. The electro-optical device according to claim 1, wherein one of the first and second shift registers selectively operates according to a selection signal. Drive circuit. 9. The first and second shift registers include:
9. The driving circuit for an electro-optical device according to claim 1, wherein individual clock signals serving as references for generation timing of the sampling circuit driving signal are supplied. 10. The apparatus according to claim 1, wherein the first and second shift registers are supplied with a common clock signal serving as a reference for generating timing of the sampling circuit drive signal. A drive circuit for the electro-optical device according to claim 1. 11. A scanning line driving circuit for supplying a scanning signal to the plurality of scanning lines, wherein the scanning line driving circuit sequentially outputs the scanning signals to the plurality of scanning lines. 2. The semiconductor device according to claim 1, further comprising a third shift register, and a fourth shift register that sequentially outputs the scan signals in a direction opposite to a direction in which the scan signals are sequentially output from the third shift register. A drive circuit for an electro-optical device according to any one of claims 10 to 13. 12. An image display area is provided at a central portion on the substrate, and first and second shift registers of the data line driving circuit are arranged on one side of a periphery of the substrate. The driving circuit for an electro-optical device according to any one of claims 1 to 11, wherein 13. An image display area is provided at a central portion on the substrate, and the data line drive circuit and the sampling circuit are partially provided in one peripheral area of the image display area on the substrate. 12. The device according to claim 1, wherein the other portion is provided on the other peripheral region on the substrate, the second peripheral region being opposed to the one peripheral region across the image display region. 3. A driving circuit for an electro-optical device according to claim 1. 14. An image display area is provided at a central portion on the substrate, and the scanning line drive circuit is partially provided in one peripheral area of the image display area on the substrate, and is provided in another portion. The electro-optic device according to claim 1, wherein the first and second peripheral regions are provided on the substrate in the other peripheral region opposed to the one peripheral region with the image display region interposed therebetween. The drive circuit of the device. 15. An electro-optical device comprising a drive circuit for the electro-optical device according to claim 1. Description: 16. A plurality of pixel electrodes arranged in a matrix on the substrate and connected to the plurality of scanning lines and the plurality of data lines, respectively, and the image signal is supplied to the plurality of pixel electrodes. 16. The electro-optical device according to claim 15, further comprising a plurality of thin film transistors that selectively supply each of the thin film transistors according to a scanning signal. 17. An electronic apparatus comprising the electro-optical device according to claim 15.