JP2018017793A - Electro-optic device and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease variation in signals supplied to signal lines.SOLUTION: A first supply circuit 200a outputs a data signal V[jodd] to odd-numbered distribution circuits 21[jodd] and outputs selection signals SEL1[1] to SEL1[K] to all distribution circuits 21[j]. A second supply circuit 200b outputs a data signal V[jeven] to even-numbered distribution circuits 21[jeven]. The odd-numbered distribution circuits 21[jodd] distribute the data signal V[jodd] to a signal line 14 by using the selection signals SEL1[1] to SEL1[K]. The even-numbered distribution circuits 21[jeven] distribute the data signal V[jeven] to the signal line 14 by using the selection signals SEL1[1] to SEL1[K]. Output lines 60b[1] to 60b[K] of selection signals SEL2[1] to SEL2[K] of the second supply circuit 200b are connected to a dummy load 400.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electro-optical device and an electronic apparatus.

  In a high-definition electro-optical device (for example, a liquid crystal display device), when a data signal is output by only one drive circuit, a large burden is placed on the one drive circuit. As a method for reducing this burden, a method of outputting a data signal using a plurality of (two) drive circuits is known (see Patent Document 1).

JP 2007-212956 A

Incidentally, the electro-optical device may have a distribution circuit such as a demultiplexer that distributes a data signal output from the drive circuit to a plurality of signal lines in accordance with a selection signal. Here, each driving circuit can output a selection signal for the distribution circuit in addition to the data signal. In this case, a case where the distribution circuit is controlled using only the selection signal output from any of the plurality of drive circuits is conceivable.
However, in this case, there is a difference in operating condition between the drive circuits and whether or not the selection signal is supplied to the distribution circuit. In the drive circuit that does not supply the selection signal to the distribution circuit, the power supply voltage does not vary with the output of the selection signal. However, in the drive circuit that supplies the selection signal to the distribution circuit, the power supply voltage varies with the output of the selection signal. (For example, the power supply voltage fluctuates to a lower voltage side as the selection signal falls). This difference in fluctuations in the power supply voltage may cause variation in data signals among the drive circuits, and may cause deterioration in image quality.

  The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a high-definition and high-quality display by suppressing deterioration in image quality due to variations in data signals.

One aspect of the electro-optical device of the present invention is arranged corresponding to each intersection of a plurality of first signal lines belonging to the first signal line group and a plurality of scanning lines, and the first signal lines are selected when the scanning lines are selected. Corresponding to each intersection of a plurality of first pixels that display gradations according to the first data signal supplied to the plurality of second signal lines belonging to the second signal line group and the plurality of scanning lines. A plurality of second pixels that are arranged and display gray scales corresponding to a second data signal supplied to the second signal line when the scanning line is selected, and the first selection signal is used to convert the first data signal to the second data signal. A first distribution unit that distributes to the first signal line; a second distribution unit that distributes the second data signal to the second signal line using a first selection signal; the first data signal and the first selection; A first supply unit for supplying a signal; a second supply unit for supplying the second data signal and the second selection signal; Wherein the second supply unit and outputs the second selection signal to the load unit.
According to this aspect, the selection signal output from the first supply unit is supplied to the first distribution unit and the second distribution unit, and the selection signal output from the second supply unit is supplied to the load unit. For this reason, the difference in load between the first supply unit and the second supply unit is reduced as compared with the configuration in which the selection signal is output from only one of the first supply unit and the second supply unit. Therefore, the luminance, etc. between the first pixel to which the first data signal is supplied and the second pixel to which the second data signal is supplied due to the difference in load between the first supply unit and the second supply unit. Variation can be reduced.

According to another aspect of the electro-optical device of the present invention, a plurality of scanning lines, a plurality of first signal lines, a plurality of second signal lines, the plurality of scanning lines, and the plurality of first signal lines are provided. A plurality of first pixels that are provided corresponding to each of the intersections and that perform display according to a first data signal supplied to the first signal line when the scanning line is selected; the plurality of scanning lines; and the plurality of scanning lines A plurality of second pixels that are provided corresponding to each of the intersections with the second signal line and that perform display according to the second data signal supplied to the second signal line when the scanning line is selected; A scanning line driving unit that sequentially selects each of the plurality of scanning lines, distribution of the first data signal to the plurality of first signal lines, and distribution of the second data signal to the plurality of second signal lines. A first supply unit that outputs a selection signal for controlling the first data signal, and the selection signal. And a second supply unit that outputs the second data signal, and a first distribution that distributes the first data signal to the plurality of first signal lines using a selection signal output from the first supply unit. A second distribution unit that distributes the second data signal to the plurality of second signal lines using the selection signal output from the first supply unit, and the selection output from the second supply unit A signal is supplied, and a dummy load that reduces a difference between the load of the first supply unit and the load of the second supply is provided.
According to this aspect, the selection signal output from the first supply unit is supplied to the first distribution unit and the second distribution unit, and the selection signal output from the second supply unit is supplied to the dummy load. For this reason, the difference in load between the first supply unit and the second supply unit is reduced as compared with the configuration in which the selection signal is output from only one of the first supply unit and the second supply unit. Therefore, it is possible to reduce the variation between the first data signal and the second data signal due to the difference in load between the first supply unit and the second supply unit. Therefore, it is possible to suppress a decrease in image quality.

In the electro-optical device described above, the first supply unit includes a first output unit that outputs the first data signal, and a second output unit and a third output unit that output the selection signal. It is desirable that the one output unit is provided between the second output unit and the third output unit.
Wiring resistance exists in the wiring that transmits the selection signal, and wiring capacitance exists between the wirings. For this reason, when the wiring becomes longer, the delay amount of the selection signal becomes larger. Therefore, the selection signal that reaches the first distribution unit according to the difference between the length of the wiring from the output source of the selection signal to the first distribution unit and the length of the wiring from the output source of the selection signal to the second distribution unit. And the selection signal arriving at the second distribution unit have a different delay amount of the selection signal. Since the difference in the delay amount of the selection signal causes variations in the distribution timing of the first data signal and the second data signal, the image quality may be degraded.
According to this aspect, the distribution operation can be controlled using the selection signals output from a plurality of locations. Therefore, compared to the case where the selection signal is output from a single location, the length of the selection signal wiring from the selection signal output source to the first distribution unit and the second distribution from the selection signal output source. It is possible to reduce the difference between the length of the selection signal wiring to the part and the difference in the delay amount of the selection signal. Therefore, it is possible to reduce image quality disturbance based on the difference in the delay amount of the selection signal.

In the electro-optical device described above, a first input unit that receives the first data signal and the selection signal from the first supply unit, and a second input unit that receives the second data signal from the second supply unit are provided. The plurality of scanning lines, the plurality of first signal lines, the plurality of second signal lines, the plurality of first pixels, the plurality of second pixels, The scanning line driving unit, the first distribution unit, and the second distribution unit are provided in the electro-optic panel, and the first distribution unit receives the first data signal and the first distribution unit via the first input unit. In response to the selection signal, the second distribution unit receives the selection signal via the first input unit, receives the second data signal via the second input unit, and receives the first input unit and the first input unit. It is hoped that the two input parts are arranged in the length direction of the first signal line. Arbitrariness.
According to this aspect, the arrangement direction of the first input unit and the second input unit coincides with the direction orthogonal to the length direction of the first signal line (hereinafter referred to as “specific direction”). The length in the specific direction in the configuration in which the first input unit and the second input unit are arranged can be shortened.

In the electro-optical device described above, the first input unit is provided closer to the first distribution unit side and the second distribution unit side than the second input unit, and the dummy load is the first input unit. It is desirable that the first input unit and the second distribution unit be provided between the first distribution unit and the first distribution unit.
According to this aspect, it is possible to bring the dummy load closer to the first distribution unit and the second distribution unit than when the dummy load is provided between the first input unit and the second input unit. . For this reason, the difference between the influence (for example, temperature) which the 1st distribution part and the 2nd distribution part receive from an external environment, and the influence which a dummy load receives from an external environment can be made small. Since the difference in influence (for example, temperature) from the external environment affects the magnitude of the load, reducing the difference increases the difference in load between the first supply unit and the second supply unit. Can be suppressed.

In the above-described electro-optical device, it is desirable to include a substrate on which the dummy load is provided.
According to this aspect, the dummy load can be fixed to the substrate.

In the electro-optical device described above, the substrate includes the plurality of scanning lines, the plurality of first signal lines, the plurality of second signal lines, the plurality of first pixels, and the plurality of second pixels. The display substrate is preferably provided with the scanning line driving unit, the first distribution unit, and the second distribution unit.
According to this aspect, since the display substrate is provided with the dummy load, it is not necessary to provide a new substrate dedicated to the dummy load, and the configuration can be downsized.

In the electro-optical device described above, it is preferable that the substrate is a control substrate provided with a control unit that controls the first supply unit and the supply unit.
According to this aspect, since the dummy load is provided on the control board provided with the control unit, it is not necessary to provide a new board dedicated to the dummy load, and the configuration can be reduced in size. Further, for example, if the dummy load is configured by a variable resistor or a variable capacitor, the load size in the dummy load can be adjusted.

In the electro-optical device described above, it is preferable that the substrate is a flexible circuit substrate provided with the second supply unit.
According to this aspect, since the dummy load is provided on the flexible circuit board provided with the second supply unit, it is not necessary to provide a new board dedicated to the dummy load, and the configuration can be reduced in size.
Also, for example, there is no need to output a selection signal from the flexible circuit board to another board via the connector terminal, so there is no need to provide a connector terminal for the selection signal on the flexible circuit board, and the number of connector terminals is reduced. It becomes possible.

In the electro-optical device described above, it is preferable that the second supply unit includes the dummy load and outputs the selection signal to the dummy load.
According to this aspect, since the dummy load is provided in the second supply unit, it is not necessary to provide a new substrate dedicated to the dummy load, and the configuration can be downsized. In addition, the wiring for supplying the selection signal to the dummy load can be shortened as compared with the case where the dummy load is provided in a component different from the second supply unit.

  One aspect of the electronic apparatus of the invention includes the above-described electro-optical device. Such an electro-optical device can suppress deterioration in image quality.

1 is a perspective view of an electro-optical device 1 according to a first embodiment employing the present invention. 2 is a perspective view of the electro-optical device 1. FIG. 1 is a diagram illustrating an electro-optical device 1. FIG. It is a circuit diagram of pixel _PIX . FIG. 6 is an explanatory diagram of the operation of the electro-optical device 1. 1 is a diagram illustrating a configuration of a part of an electro-optical device 1. FIG. 5 is a diagram showing an example of a dummy load 400. FIG. 1 is a diagram illustrating a configuration of a part of an electro-optical device 1. FIG. It is a figure showing electrooptic device 1A concerning a 2nd embodiment. It is a figure showing electro-optical device 1B concerning a 3rd embodiment. It is the figure which showed a part of flexible circuit board 300a. It is the figure which showed a part of flexible circuit board 400a. It is a figure showing electrooptic device 1C concerning a 4th embodiment. 5 is a diagram for explaining an example of connection with a dummy load 400. FIG. 5 is a diagram for explaining an example of connection with a dummy load 400. FIG. It is a perspective view which shows the form (projection type display apparatus) of an electronic device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the size and scale of each part are appropriately different from the actual ones. Further, since the embodiments described below are preferred specific examples of the present invention, various technically preferable limitations are attached thereto. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.

<First Embodiment>
FIG. 1 is a diagram illustrating a configuration of a signal transmission system of an electro-optical device 1 according to an embodiment of the present invention. The electro-optical device 1 includes an electro-optical panel 100, a first supply circuit 200a, a second supply circuit 200b, a flexible printed circuit circuit board 300a as a first wiring board, and a flexible circuit as a second wiring board. And a substrate 300b. Note that the electro-optical device 1 may have a number of pixels of 3840 × 2160, for example, in which the number of pixels of full high-definition is doubled vertically and doubled. Each of the first supply circuit 200a and the second supply circuit 200b is, for example, a driving integrated circuit.
FIG. 2 is a perspective view illustrating a configuration example of the electro-optical device 1 according to the first embodiment employing the present invention. 2 is a perspective view of the opposite surface of the main part of FIG.
<Outline of electro-optical device 1>
The electro-optical device 1 has a configuration in which flexible circuit boards 300 a and 300 b are connected to one side of the electro-optical panel 100.

  The first supply circuit 200a is mounted on the flexible circuit board 300a by COF (Chip On Film) technology. The second supply circuit 200b is mounted on the flexible circuit board 300b by COF technology. The flexible circuit board 300a is laminated on the flexible circuit board 300b. The first supply circuit 200a is stacked on the second supply circuit 200b. As described above, in the present embodiment, the flexible circuit board 300a and the flexible circuit board 300b are attached so as to partially overlap in the direction (z direction) perpendicular to the display surface of the electro-optical panel 100.

  The electro-optical panel 100 is an example of a display substrate. The electro-optical panel 100 includes a first input unit 110a, a second input unit 110b, and a dummy load 400 (see FIG. 3).

  The first input unit 110a is an input terminal group. The first input unit 110a receives, for example, various signals output from the first supply circuit 200a via the flexible circuit board 300a. The second input unit 110b is an input terminal group. For example, the second input unit 110b receives various signals output from the second supply circuit 200b via the flexible circuit board 300b. The electro-optical panel 100 is driven based on various signals received by the first input unit 110a and various signals received by the second input unit 110b.

  The dummy load 400 is used to reduce a load difference between the first supply circuit 200a and the second supply circuit 200b. Details of the dummy load 400 will be described later.

  The flexible circuit boards 300a and 300b are provided with wiring (not shown in FIGS. 1 and 2) for transmitting signals.

  One end (connection terminal 300a1) of the wiring of the flexible circuit board 300a is connected to the first input unit 110a of the electro-optical panel 100. The other end of the wiring of the flexible circuit board 300a is connected to a control board 600 (see FIG. 9) provided with a control circuit 500 (see FIG. 3). The first supply circuit 200a is electrically connected to the electro-optical panel 100 and the control circuit 500 via the wiring of the flexible circuit board 300a.

  One end (connection terminal 300b1) of the wiring of the flexible circuit board 300b is connected to the second input unit 110b of the electro-optical panel 100. The other end of the wiring of the flexible circuit board 300b is connected to the control board 600 on which the control circuit 500 is provided. The second supply circuit 200b is electrically connected to the electro-optical panel 100 and the control circuit 500 via the wiring of the flexible circuit board 300b.

The first supply circuit 200 a receives the digital data signal _DVID and various signals for drive control from the control circuit 500. The digital data signal _DVID is a digital signal that designates the gradation of the pixel P _IX (see FIG. 3) in the electro-optical panel 100 by time division. The first supply circuit 200a drives the electro-optical panel 100 based on the signal received from the control circuit 500.

The second supply circuit 200b receives the digital data signal _DVID and various signals for drive control from the control circuit 500. The second supply circuit 200b drives the electro-optical panel 100 based on the signal received from the control circuit 500.

<Details of electro-optical device 1>
FIG. 3 is a diagram schematically illustrating the configuration of the electro-optical device 1.
The electro-optical device 1 is controlled by a control circuit 500.
The electro-optical panel 100 includes a pixel unit 10 in which a plurality of pixels _PIX are arranged in a matrix, a scanning line driving circuit 20, a distribution circuit group 21, and a dummy load 400.

<Pixel unit 10>
The pixel unit 10 includes M scanning lines 12 extending from the scanning line driving circuit 20 in the row direction (x direction) (M is a natural number of 2 or more) and the distribution circuit group 21 in the column direction (y direction). N signal lines 14 (N is 2K (K is a natural number of 2 or more)) extending along the line are formed. The M scanning lines 12 are an example of a plurality of scanning lines. The M scanning lines 12 and the N signal lines 14 cross each other through an insulating layer.

The plurality of pixels _PIX are provided corresponding to each intersection of each scanning line 12 and each signal line 14. For this reason, the plurality of pixels _PIX are arranged in a matrix of vertical M rows × horizontal N rows. Each pixel _PIX displays a gradation corresponding to the potential of the signal line 14 when the scanning line 12 is selected.
The pixel unit 10 may have the entire area as a display effective area, but a part of the peripheral part is a non-display area, the peripheral scanning line 12, the signal line 14, and the pixel _PIX are a dummy scanning line, a dummy signal line, It may be arranged as a dummy pixel.

FIG. 4 is a circuit diagram of the pixel _PIX . Each pixel _PIX includes a liquid crystal element 42 and a selection switch 44.

  The liquid crystal element 42 is an example of an electro-optical element. The liquid crystal element 42 includes a pixel electrode 421 and a common electrode 423 that face each other, and a liquid crystal 425 that is interposed between the pixel electrode 421 and the common electrode 423. The transmittance of the liquid crystal 425 changes according to the voltage applied between the pixel electrode 421 and the common electrode 423. In the following description, for convenience, the voltage applied to the liquid crystal element 42 when the pixel electrode 421 is higher in potential than the common electrode 423 is referred to as “positive polarity”, and the pixel electrode 421 is lower in potential than the common electrode 423. The applied voltage in this case is referred to as “negative polarity”.

The selection switch 44 is composed of, for example, an N-channel thin film transistor having a gate connected to the scanning line 12. The selection switch 44 is interposed between the liquid crystal element 42 (pixel electrode 421) and the signal line 14, and controls the electrical connection (conduction / non-conduction) between them. The pixel P _IX (liquid crystal element 42) displays a gradation corresponding to the potential of the signal line 14 when the selection switch 44 is controlled to be in an on state. Note that illustration of an auxiliary capacitor connected in parallel to the liquid crystal element 42 is omitted. Further, the configuration of the pixel _PIX can be changed as appropriate.

Returning to FIG. The N signal lines 14 are divided into J wiring groups (blocks) B [j] (j is a natural number of 1 ≦ j ≦ J, J = N / K) with K as one unit. That is, the signal lines 14 are grouped for each wiring group block B. The J wiring groups B [1] to B [J] correspond to the J data lines 16 [1] to 16 [J] on a one-to-one basis. Data signals V _ID [1] to V _ID [J] are supplied to the data lines 16 [1] to 16 [J], respectively. In this embodiment, J is an even number equal to or greater than 2, and one unit of K signal lines 14 are adjacent to each other (sequentially arranged), so that the odd-numbered wiring group B [joind] and the even-numbered wiring group B [ jeven] are alternately arranged. The data signals V _ID [1] to V _ID [J] include a data signal V _ID [jod] and a data signal V _ID [jeven].

The signal lines 14 belonging to the odd-numbered wiring group B [joind] among the J wiring groups B [1] to B [J] are an example of a plurality of first signal lines. The wiring group B [joind] includes odd-numbered wiring groups B [1], B [3]... B [J-1]. jord means “1, 3,... J−1”.
The first supply circuit 200a receives, via the first input unit 110a, the data group V _ID [joind] including the potential supplied to the K signal lines 14 belonging to the wiring group B [joind] in a time division manner. The data is output to the data line 16 [jodd] corresponding to [jodd].

The signal line 14 belonging to the even-numbered wiring group B [jeven] among the J wiring groups B [1] to B [J] is an example of a plurality of second signal lines. The wiring group B [jeven] includes even-numbered wiring groups B [2], B [4]... B [J]. jeven means “2, 4... J”.
The second supply circuit 200b receives the data signal V _ID [jeven] including the potential supplied to the K signal lines 14 belonging to the wiring group B [jeven] in a time division manner via the second input unit 110b. It outputs to the data line 16 [jeven] corresponding to [jeven].

<Control circuit 500>
The control circuit 500 controls the scanning line driving circuit 20, the first supply circuit 200a, and the second supply circuit 200b using various signals including a synchronization signal. The control circuit 500 is an example of a control unit that controls the first supply circuit 200a and the second supply circuit 200b. Hereinafter, examples of functions of the control circuit 500 will be described.

As shown in FIG. 5, the control circuit 500 includes a vertical synchronization signal V _SYNC defining a vertical scanning period V, a horizontal synchronization signal H _SYNC defining a horizontal scanning period, a scanning line driving circuit 20, and a first supply circuit. 200a and the second supply circuit 200b.

The control circuit 500 includes a plurality of pixels (a plurality of first pixels) P _IX provided corresponding to each intersection of the M scanning lines 12 and the signal lines 14 belonging to the odd-numbered wiring group B [joind]. The digital data signal DV _ID [joind] for designating the gray scale of the first to third is output to the first supply circuit 200a. Further, as shown in FIG. 5, the control circuit 500 is set so that the polarity of the data signal V _ID [joind] (the voltage applied to the liquid crystal element 42 shown in FIG. 4) is inverted every vertical scanning period V. the digital data signals D-V _ID [jodd], and outputs the first supply circuit 200a. The first supply circuit 200a generates a data signal V _ID [iodd] based on the digital data signals D-V _ID [jodd].
Here, the relationship between the digital data signal DV _ID [joind] output from the control circuit 500 and the data signal V _ID [jord] output from the first supply circuit 200a will be described.
Digital data signals D-V _ID [jodd] specifies in a time division gray scale of the plurality of first pixel P _IX. On the other hand, the data signal V _ID [jod] includes, in a time division manner, a potential corresponding to the gradation specified by the digital data signal DV _ID [jod] in a time division manner. The data signal V _ID [joind] is an example of a first data signal.

The control circuit 500 includes a plurality of pixels (a plurality of second pixels) P _IX provided corresponding to each intersection of the M scanning lines 12 and the signal lines 14 belonging to the even-numbered wiring group B [jeven]. The digital data signal DV _ID [jeven] designating the gray scales in time division is output to the second supply circuit 200b. As shown in FIG. 5, the control circuit 500 performs digital data set so that the polarity of the data signal V _ID [jeven] (the voltage applied to the liquid crystal element 42 shown in FIG. 4) is inverted every vertical scanning period V. The signal DV _ID [jeven] is output to the second supply circuit 200b. Second supply circuit 200b generates data signals V _ID [ieven] based on the digital data signals D-V _ID [ieven].
Here, the relationship between the digital data signal DV _ID [jeven] output from the control circuit 500 and the data signal V _ID [jeven] output from the second supply circuit 200b will be described.
Digital data signals D-V _ID [jeven] specifies in a time division gray scale of the plurality of second pixels P _IX. On the other hand, the data signal V _ID [jeven] includes, in a time division manner, a potential corresponding to the gradation specified by the digital data signal DV _ID [jeven] in a time division manner. The data signal V _ID [jeven] is an example of a second data signal.

  The first data signal and the second data signal are so-called data signals, are signals having different waveforms according to image display, and are analog signals, for example.

Further, the control circuit 500 outputs K-system selection signals SEL [1] to SEL [K] corresponding to the number (K) of signal lines 14 in each wiring group B [j] (j = 1 to J). Generate. The control circuit 500 outputs selection signals SEL [1] to SEL [K] to the first supply circuit 200a and the second supply circuit 200b.
The selection signals SEL [1] to SEL [K] are examples of selection signals. The selection signal is a distribution signal that controls distribution of the data signal V _ID [j] to the K signal lines 14 belonging to each wiring group B [j], and is a timing signal. Selection signal, the distribution of the wiring group B data signal V _ID to the signal line 14 belonging to the [jodd] [jodd], the distribution of the wiring group B data signal V _ID to the signal line 14 belonging to the [jeven] [jeven] And a signal for controlling.

The control circuit 500 selects, for example, LVDS (Low Voltage Differential Signaling), a vertical synchronizing signal V _SYNC , a horizontal synchronizing signal H _SYNC, and a digital data signal DV _ID [joind]. The signals SEL [1] to SEL [K] are output to the first supply circuit 200a. Note that the control circuit 500 is different from the LVDS in the vertical synchronization signal V _SYNC , the horizontal synchronization signal H _SYNC , the digital data signal DV _ID [joind], and the selection signals SEL [1] to SEL [K. May be output to the first supply circuit 200a.
Further, the control circuit 500 is, for example, an LVDS, a vertical synchronization signal V _SYNC , a horizontal synchronization signal H _SYNC , a digital data signal DV _ID [jeven], and selection signals SEL [1] to SEL [K]. Is output to the second supply circuit 200b. The control circuit 500 is different from the LVDS in that the vertical synchronization signal V _SYNC , the horizontal synchronization signal H _SYNC , the digital data signal DV _ID [jeven], and the selection signals SEL [1] to SEL [K May be output to the second supply circuit 200b.

<Scanning line driving circuit 20>
The scanning line driving circuit 20 is an example of a scanning line driving unit. Scanning line driving circuit 20, as shown in FIG. 5, in response to the horizontal synchronizing signal H _SYNC, the scanning signal G [1] ~G [M] sequentially every unit period U in each of the M scan lines 12 Then, each of the M scanning lines 12 is sequentially selected. The unit period U is set to one cycle time length (horizontal scanning period (1H)) of the horizontal synchronization signal _HSYNC .

  As shown in FIG. 5, the scanning line driving circuit 20 applies the scanning signal G [m] supplied to the scanning line 12 of the m-th row (m-th line) to M unit periods in each vertical scanning period V. U is set to a high level (potential meaning selection of the scanning line 12) within the m-th unit period U. The period during which the scanning line 12 is selected is also referred to as a line period, and substantially corresponds to the unit period U in this embodiment.

When the scanning line driving circuit 20 selects the m-th row scanning line 12, the selection switches 44 of the N pixels P _IX in the m-th row are turned on.

As shown in FIG. 5, the unit period U includes a precharge period T _PRE and a writing period T _WRT .
The precharge period T _PRE is provided before the start of the writing period T _WRT . In FIG. 5, one precharge period T _PRE before the writing period T _WRT is provided, the precharge period T _PRE plurality before the writing period T _WRT (e.g., two) provided May be.
In the writing period T _WRT, the data signal V _ID corresponding to the specified gradation of each pixel P _IX (potential) is supplied to each signal line 14. In the precharge period T _PRE , a predetermined precharge potential V _PRE (V _PREa , V _PREb ) is supplied to each signal line 14.

<Distribution circuit group 21>
Returning to FIG. The distribution circuit group 21 includes J distribution circuits 21 [1] to 21 [J]. The distribution circuits 21 [1] to 21 [J] correspond to the wiring groups B [1] to B [J] on a one-to-one basis. For example, a demultiplexer is used as each of the distribution circuits 21 [1] to 21 [J].

  FIG. 6 is a diagram illustrating an example of the distribution circuits 21 [1] to 21 [J], the first supply circuit 200a, the second supply circuit 200b, and the dummy load 400.

  The j-th (j = 1 to J) -th distribution circuit 21 [j] includes K switches 40 [1] to 40 [] corresponding to the K signal lines 14 of the j-th wiring group B [j]. K]. As each of the switches 40 [1] to 40 [K], for example, a transistor is used.

  The kth (k = 1 to K) switch 40 [k] in the distribution circuit 21 [j] is connected to the kth signal line 14 of the K signal lines 14 of the wiring group B [j]. , Between the J data lines 16 [1] to 16 [J] and the j-th data line 16 [j] to control electrical connection (conduction / non-conduction) between them. To do.

The odd-numbered distribution circuit 21 [jodd] is connected to the first supply circuit 200a via the odd-numbered data line 16 [jodd] and the first input unit 110a. The first supply circuit 200a outputs the data signal V _ID [joind] to the odd-numbered distribution circuit 21 [jodd] via the first input unit 110a and the odd-numbered data line 16 [jodd].

  The odd-numbered distribution circuit 21 [jod] supplies the first supply via the first selection signal line group 60a including the K first selection signal lines 60a [1] to 60a [K] and the first input unit 110a. The circuit 200a is connected. The first supply circuit 200a sends the first selection signal SEL [k] to the odd-numbered distribution circuit 21 [joind] via the kth first selection signal line 60a [k] in the first selection signal line group 60a. ] Is output. The first selection signals SEL1 [1] to SEL1 [K] are selection signals SEL [1] to SEL [K] output from the first supply circuit 200a.

The odd-numbered distribution circuit 21 [jodd] distributes the data signal V _ID [jodd] to the K signal lines 14 belonging to the wiring group B [jodd]. The first selection signal is output from the first supply circuit 200a. SEL1 [1] to SEL1 [K] are used.
The distribution circuit 21 [jodd] uses the first selection signals SEL1 [1] to SEL1 [K] to send the data signal V _ID [jodd] (first data signal) to K lines belonging to the wiring group B [jodd]. It is an example of the 1st distribution part which performs the 1st distribution operation | movement distributed to the signal line 14 (a some 1st signal line).

The even-numbered distribution circuit 21 [jeven] is connected to the second supply circuit 200b via the even-numbered data line 16 [jeven] and the second input unit 110b. The second supply circuit 200b outputs the data signal V _ID [jeven] to the even-numbered distribution circuit 21 [jeven] via the second input unit 110b and the even-numbered data line 16 [jeven].

  The even-numbered distribution circuit 21 [jeven] is connected to the first supply circuit 200a via the first selection signal line group 60a. The first supply circuit 200a sends the first selection signal SEL1 [k] to the even-numbered distribution circuit 21 [jeven] via the kth first selection signal line 60a [k] in the first selection signal line group 60a. ] Is output.

The even-numbered distribution circuit 21 [jeven] distributes the data signal V _ID [jeven] to the K signal lines 14 belonging to the wiring group B [jeven], and the first selection signal output from the first supply circuit 200a. SEL1 [1] to SEL1 [K] are used.
The distribution circuit 21 [jeven] uses the first selection signals SEL1 [1] to SEL1 [K] to transfer the data signal V _ID [jeven] (second data signal) to K lines belonging to the wiring group B [jeven]. It is an example of the 2nd distribution part which performs the 2nd distribution operation | movement distributed to the signal line 14 (a some 2nd signal line).

The first data signal (data signal V _ID [joind]) output by the first supply circuit 200a is supplied to the odd-numbered distribution circuit 21 [joind] via the first input section 110a and the odd-numbered data line 16 [jodd]. ] Is supplied. The second data signal (data signal V _ID [jeven]) output from the second supply circuit 200b is supplied to the even-numbered distribution circuit 21 [jeven] via the second input section 110b and the even-numbered data line 16 [jeven]. ] Is supplied. The data lines 16 [jodd] and the data lines 16 [jeven] are arranged alternately. The first input unit 110 a and the second input unit 110 b are arranged side by side with a space in the vertical direction (y direction) of the electro-optical panel 100.
In this case, the pitch of the data line 16 [j] can be made smaller than the pitch of the data line 16 [jod] and the pitch of the data line 16 [jeven]. In addition, it becomes easy to alternately arrange pixel groups (a plurality of first pixels) to which the first data signal is supplied and pixel groups (a plurality of second pixels) to which the second data signal is supplied. When such a pixel group arrangement is performed, a difference in image quality between the pixel groups can be made inconspicuous. In addition, a high-definition image can be displayed without increasing the size of the electro-optical panel 100 in the horizontal direction (x direction).

<First Supply Circuit 200a>
The first supply circuit 200a is an example of a first supply unit. The first supply circuit 200a includes a first output unit 200a1 that outputs a data signal V _ID [joind], a second output unit 200a2 that outputs first selection signals SEL1 [1] to SEL1 [K], and a third output unit. 200a3. The first output unit 200a1 is provided between the second output unit 200a2 and the third output unit 200a3.

As illustrated in FIG. 3, the first supply circuit 200a receives a vertical synchronization signal V _SYNC , a horizontal synchronization signal H _SYNC , a digital data signal DV _ID [joind], and a selection signal SEL [1 from the control circuit 500. ] To SEL [K].
The first supply circuit 200a generates a data signal V _ID [jodd] from the digital data signals D-V _ID [jodd]. The first supply circuit 200a outputs the data signal V _ID [joind] from the first output unit 200a1 to the data line 16 [joind] at a timing according to the vertical synchronization signal V _SYNC and the horizontal synchronization signal H _SYNC . As shown in FIG. 6, the first selection signals SEL1 [1] to SEL1 [K] are output from the second output unit 200a2 and the third output unit 200a3 to the first selection signal lines 60a [1] to 60a [K], respectively. To do.
The distribution circuits 21 [1] to 21 [J] receive the first selection signals SEL1 [1] to SEL1 [K] from the first selection signal lines 60a [1] to 60a [K], and the first selection signal SEL1. The data signal V _ID is distributed to the signal line 14 using [1] to SEL1 [K].

<Second supply circuit 200b>
The second supply circuit 200b is an example of a second supply unit. The second supply circuit 200b includes a fourth output unit 200b1 that outputs the data signal V _ID [jeven], a fifth output unit 200b2 that outputs the second selection signals SEL2 [1] to SEL2 [K], and a sixth output unit. 200b3. The fourth output unit 200b1 is provided between the fifth output unit 200b2 and the sixth output unit 200b3. The second selection signals SEL2 [1] to SEL2 [K] are timing signals having the same timing as the first selection signals SEL1 [1] to SEL1 [K], respectively.

As illustrated in FIG. 3, the second supply circuit 200b receives a vertical synchronization signal V _SYNC , a horizontal synchronization signal H _SYNC , a digital data signal DV _ID [jeven], and a selection signal SEL [1 from the control circuit 500. ] To SEL [K].
Second supply dynamic circuit 200b generates data signals V _ID [jeven] from the digital data signals D-V _ID [jeven]. The second supply circuit 200b outputs the data signal V _ID [jeven] from the fourth output unit 200b1 to the data line 16 [jeven] at a timing according to the vertical synchronization signal V _SYNC and the horizontal synchronization signal H _SYNC . The two selection signals SEL2 [1] to SEL2 [K] are output from the fifth output unit 200b2 and the sixth output unit 200b3 to the K second selection signal lines 60b [1] to 60b [K], respectively. .
The second selection signal lines 60b [1] to 60b [K] are examples of output lines of the second selection signals SEL2 [1] to SEL2 [K] of the second supply circuit 200b. The second selection signal lines 60b [1] to 60b [K] are included in the second selection signal line group 60b. The second selection signal line group 60b is connected to the dummy load 400.

<Dummy load 400>
FIG. 7 is a diagram illustrating an example of the dummy load 400.
The dummy load 400 includes resistors R1 [k] and R2 [k] and a capacitor C [k] connected to each second selection signal line 60b [k].
The value of the load in the dummy load 400 is a load related to the first selection signals SEL1 [1] to SEL1 [K] of the first supply circuit 200a (for example, the switch 40 [1] of the distribution circuits 21 [1] to 21 [J]). To [K] and the load relating to the first selection signal lines 60a [1] to 60a [K]). For example, the value of the dummy load 400 is set to match the load related to the first selection signals SEL1 [1] to SEL1 [K] of the first supply circuit 200a.
The dummy load 400 is connected between the second selection signal line 60b [k] connected to the fifth output unit 200b2 of the second supply circuit 200b and the sixth output unit 200b3 of the second supply circuit 200b. Yes.
In the present embodiment, the dummy load is a load unit having a resistance and a capacity that are not connected to any of the first distribution unit and the second distribution unit.

  In the present embodiment, the first selection signals SEL1 [1] to SEL1 [K] and the second selection signals SEL2 [1] to SEL2 [K] are output as signals having the same waveform, and are distributed in the distribution circuit 21 [j]. This is a pulse signal that turns on the switch 40 [k] for a predetermined time.

In the present embodiment, as described above, the first supply circuit 200a outputs the data signal V _ID [joind] to the odd-numbered distribution circuit 21 [joind]. In addition, the first supply circuit 200a sends the first selection signal SEL1 [k] to the odd-numbered distribution circuit 21 [joind] and the even-numbered distribution circuit 21 [jeven] via the first selection signal line 60a [k]. Output to. On the other hand, the second supply circuit 200b outputs the data signal V _ID [jeven] to the even-numbered distribution circuit 21 [jeven]. The second supply circuit 200b outputs the second selection signal SEL2 [k] to the second selection signal line 60b [k]. The second selection signal line 60b [k] is connected to a dummy load.
That is, the first supply circuit outputs the first data signal to the data line connected to the first distribution circuit, and outputs the first selection signal to the first selection signal line connected to the first distribution circuit and the second distribution circuit. Then, the second supply circuit outputs the second data signal to the data line connected to the two distribution circuit, and outputs the second selection signal to the second selection signal line to which the dummy load is connected.

<Overview of operation>
Next, an outline of the operation of the electro-optical device 1 will be described.
The first supply circuit 200a outputs the data signal V _ID [jod] (first data signal) from the first output unit 200a1 to the data line 16 [jod]. The first supply circuit 200a further sends first selection signals SEL1 [1] to SEL1 [K] from the second output unit 200a2 and the third output unit 200a3 to the first selection signal lines 60a [1] to 60a. Output to [K] respectively.

The second supply circuit 200b outputs the data signal V _ID [jeven] (second data signal) from the fourth output unit 200b1 to the data line 16 [jeven]. The second supply circuit 200b further outputs the second selection signals SEL2 [1] to SEL2 [K] from the fifth output unit 200b2 and the sixth output unit 200b3 to the dummy load 400. Output to lines 60b [1] to 60b [K], respectively.

The distribution circuit 21 [jodd] distributes the data signal V _ID [jodd] to the K signal lines 14 in the wiring group B [jodd] using the first selection signals SEL1 [1] to SEL1 [K]. A first distribution operation is performed.
The distribution circuit 21 [jeven] distributes the data signal V _ID [jeven] to the K signal lines 14 in the wiring group B [jeven] using the first selection signals SEL1 [1] to SEL1 [K]. A second distribution operation is performed.

As described above, the first selection signals SEL1 [1] to SEL1 [K] output from the first supply circuit 200a are used in the distribution circuit 21 [joind] and the distribution circuit 21 [jeven].
On the other hand, the second selection signals SEL2 [1] to SEL2 [K] output from the second supply circuit 200b are not used by any of the distribution circuit 21 [jod] and the distribution circuit 21 [jeven], but are supplied to the dummy load 400. Is done.
For this reason, the difference in load between the first supply circuit 200a and the second supply circuit 200b is reduced. Therefore, it is possible to reduce the variation between the data signal V _ID [jod] and the data signal V _ID [jeven] due to the load difference between the first supply circuit 200a and the second supply circuit 200b. Therefore, it is possible to suppress a decrease in image quality.

<Detailed description of operation>
<1. Precharge operation>
First, the precharge operation will be described.

The first supply circuit 200a, as shown in FIG. 5, the precharge period T _PRE, sets a data signal V _ID [jodd] to precharge potential V _PRE (either the V _PREa and V _PREb). The precharge potential V _PRE is set to a negative potential with respect to a predetermined reference potential V _REF (for example, a potential corresponding to the amplitude center of the data signal V _ID ).

As shown in FIG. 5, the pre-charge period immediately before the writing period T _WRT T _PRE is set to a positive polarity with respect to the potential is the reference potential V _REF of the data signal V _ID [jodd], the first supply circuit 200a Sets the data signal V _ID [joind] to the precharge potential V _PREa .
On the other hand, in the precharge period T _PRE immediately before the write period T _WRT in which the potential of the data signal V _ID [joind] is set to be negative with respect to the reference potential V _REF , the first supply circuit 200a _ID [joind] is set to the precharge potential V _PREb .
Note that the precharge potential V _PREa is lower than the precharge potential V _PREb . More, the difference between the precharge potential V _PREa and the reference potential V _REF is greater than the difference between the precharge potential V _PREb and the reference potential V _REF.

The first supply circuit 200a during the precharge period T _PRE, the first selection signal SEL1 [1] ~SEL1 [K] simultaneously active level (potential shifts the switch 40 [k] in an ON state) Set (see SEL [1] to SEL [K] in FIG. 5).

As illustrated in FIG. 5, the second supply circuit 200 b sets the data signal V _ID [jeven] to the precharge potential V _PRE (one of V _PREa and V _PREb ) in the precharge period T _PRE .

Similar to the data signal V _ID [jodd], the pre-charge period immediately before the writing period T _WRT T _PRE is set to a positive polarity with respect to the potential is the reference potential V _REF of the data signal V _ID [jeven], the 2 The supply circuit 200b sets the data signal V _ID [jeven] to the precharge potential V _PREa .
On the other hand, in the precharge period T _PRE immediately before the write period T _WRT in which the potential of the data signal V _ID [jeven] is set to be negative with respect to the reference potential V _REF , the second supply circuit 200b receives the data signal V _ID [jeven] is set to the precharge potential V _PREb .

The second supply circuit 200b sets during precharge period T _PRE, the second selection signal SEL2 [1] ~SEL2 [K] simultaneously active level.

Therefore, in the precharge period T _PRE, the first selection signal SEL1 [1] ~SEL1 [K] of the first supply circuit 200a is output to all the switch 40 [k] is turned on in the distribution circuit group 21 transition, and each of the signal lines 14 to be connected to the distribution circuit group 21 (more pixel electrode 421 in each pixel P _IX) precharge potential V _pRE in parallel to be supplied.
At this time, the second selection signals SEL2 [1] to SEL2 [K] output from the second supply circuit 200b are supplied to the dummy load 400.
Therefore, even during the precharge period T _PRE , the first supply circuit 200a and the second selection signal SEL2 [1] to SEL2 [K] are compared with the case where the second load signals SEL2 [1] to SEL2 [K] are not supplied to the dummy load 400 or the distribution circuit [j]. The difference in load between the two supply circuits 200b is reduced, and the difference in fluctuation of the power supply voltage accompanying the output of the selection signal is reduced. Therefore, variation between the data signal V _ID [jod] and the data signal V _ID [jeven] can be reduced, and variation in the effect of precharging can be reduced. Therefore, it is possible to suppress a decrease in image quality.

<2. Write operation>
Next, the write operation will be described.

The first supply circuit 200a is in the write period T _WRT in the selection period of the scanning line 12 of the m-th row, the potential of the data signal V _ID [jodd], the scanning line 12 of the m-th row wiring group B [jodd ] _Is set in time division to a potential corresponding to the designated gradation of the pixel _PIX corresponding to each intersection with the signal line 14 in FIG. Specified gradation of each pixel P _IX is defined by the digital data signals D-V _ID supplied [jodd] from the control circuit 500.
The first supply circuit 200a sequentially inverts the polarity of the potential of the data signal V _ID [jod] with respect to the reference potential V _REF periodically (for example, every vertical scanning period V) in order to prevent so-called burn-in.

The first supply circuit 200a includes a first selection signal SEL1 in the write period _{T WRT [1] ~SEL1 [K} ], at the K selection period S [1] ~S [K] , active in order The level is set (see SEL [1] to SEL [K] shown in FIG. 5).

The second supply circuit 200b applies the potential of the data signal V _ID [jeven] to the m-th row scanning line 12 and the wiring group B [jeven] in the writing period T _WRT within the selection period of the m-th row scanning line 12. ] _Is set in time division to a potential corresponding to the designated gradation of the pixel _PIX corresponding to each intersection with the signal line 14 in FIG. Specified gradation of each pixel P _IX is defined by the digital data signals D-V _ID supplied [jeven] from the control circuit 500.
The second supply circuit 200b sequentially inverts the polarity of the potential of the data signal V _ID [jeven] with respect to the reference potential V _REF periodically (for example, every vertical scanning period V).

The second supply circuit 200b is the second selection signal SEL2 in the write period _{T WRT [1] ~SEL2 [K} ], at the K selection period S [1] ~S [K] , active in order Set to level.

In the period in which the m-th scanning line 12 is selected, the K switches 40 [1] to 40 [K] in each of the distribution circuits 21 [1] to 21 [J] are selected in the selection period S [k]. Among them, the k-th switch 40 [k] (a total of J switches 40 [k]) is turned on by the first selection signal SEL1 [k] output from the first supply circuit 200a. As a result, the potential of the data signal V _ID [j] is supplied to the signal line 14 in the k-th column of each wiring group B [j].
That is, in the writing period _TWRT in each unit period U, data is transferred to the K signal lines 14 in the wiring group B [j] in each of the J wiring groups B [1] to B [J]. The potential of the signal V _ID [j] is supplied in a time division manner. Then, a potential corresponding to the designated gradation is written to the pixel _PIX corresponding to each intersection of the m-th row scanning line 12 and the k-th signal line 14 in the wiring group B [j].
At this time, the second selection signals SEL2 [1] to SEL2 [K] output from the second supply circuit 200b are supplied to the dummy load 400.
Therefore, even in the writing period T _WRT, in comparison with the case where the second selection signal SEL2 [1] ~SEL2 [K] is not also supplied to the even distribution circuit 21 [j] to the dummy load 400, a first supply circuit 200a The difference in load between the second supply circuit 200b is reduced and the difference in fluctuation of the power supply voltage accompanying the output of the selection signal is reduced. For this reason, it is possible to reduce the variation between the data signal V _ID [joind] and the data signal V _ID [jeven]. Therefore, it is possible to suppress a decrease in image quality.

<Arrangement direction of distribution circuit 21 [j] and arrangement direction of first input unit 110a and second input unit 110b>
FIG. 8 is a diagram illustrating an example of the arrangement direction of the distribution circuits 21 [1] to 21 [J] and the arrangement direction of the first input unit 110a and the second input unit 110b. In FIG. 8, the first supply circuit 200a and the flexible circuit board 300a are omitted from the electro-optical device 1 for simplification of description.
As shown in FIG. 8, the distribution circuits 21 [1] to 21 [J] are arranged along the row direction (x direction) in which the scanning lines 12 extend. The input terminals of the first input unit 110a and the input terminals of the second input unit 110b are arranged in the row direction. On the other hand, the first input unit 110a and the second input unit 110b are arranged along the column direction (y direction) in which the signal lines 14 extend.
For this reason, the size (width) of the electro-optical device 1 in the x direction can be reduced as compared with the case where the arrangement direction of the first input unit 110a and the second input unit 110b is arranged in the column direction (x direction).

The first input unit 110a receives the data signal V _ID [jod] and the first selection signals SEL1 [1] to SEL1 [K] from the first supply circuit 200a. The second input unit 110b receives the data signal V _ID [jeven] and the second selection signals SEL2 [1] to SEL2 [K] from the second supply circuit 200b. The distribution circuit 21 [jodd] receives the data signal V _ID [jodd] and the first selection signals SEL1 [1] to SEL1 [K] via the first input unit 110a. The distribution circuit 21 [jeven] receives the first selection signals SEL1 [1] to SEL1 [K] through the first input unit 110a and the data signal V _ID [jeven] through the second input unit 110b. The dummy load 400 is supplied with the second selection signals SEL2 [1] to SEL2 [K] via the second input unit 110b.

The first input unit 110a is provided closer to the distribution circuits 21 [1] to 21 [J] than the second input unit 110b. The dummy load 400 is provided between the first input unit 110a and the distribution circuits 21 [1] to 21 [J].
Therefore, the dummy load 400 can be brought closer to the distribution circuits 21 [1] to 21 [J]. For this reason, the difference between the influence (for example, temperature) which distribution circuit 21 [1] -21 [J] receives from an external environment, and the influence which dummy load 400 receives from an external environment can be made small. Since the difference in influence (for example, temperature) from the external environment affects the magnitude of the load, reducing this difference increases the difference in load between the first supply circuit 200a and the second supply circuit 200b. It becomes possible to suppress becoming.

Note that there is a resistance in the wiring (first selection signal lines 60a [1] to 60a [K]) that transmits the first selection signals SEL1 [1] to SEL1 [K], and there is a capacitance between the wirings. To do. For this reason, when the wiring for transmitting the first selection signals SEL1 [1] to SEL1 [K] becomes longer, the delay amount of the first selection signals SEL1 [1] to SEL1 [K] increases. Therefore, the first selection signals SEL1 [1] to SEL1 [1] to SEL1 [K] are output in accordance with the difference in wiring length from the output source to each distribution circuit 21 [j]. The delay amount of SEL1 [K] is different. The difference in the delay amount of the first selection signals SEL1 [1] to SEL1 [K] causes variations in the writing timing of the data signal V _ID , which may cause deterioration in image quality.

In the present embodiment, as shown in FIGS. 3 and 6, the second output unit 200 a 2 and the third output unit 200 a 3 are provided at positions sandwiching the first output unit 200 a 1. Therefore, the distribution circuit 21 [j] controls the distribution operation using the first selection signals SEL1 [1] to SEL1 [K] output from a plurality of locations (second output unit 200a2 and third output unit 200a3). It becomes possible.
Therefore, compared with the case where the first selection signals SEL1 [1] to SEL1 [K] are output from a single location, each distribution circuit from the output source of the first selection signals SEL1 [1] to SEL1 [K]. The difference in transmission line length of the first selection signals SEL1 [1] to SEL1 [K] up to 21 [j] can be shortened, and the delay amount of the first selection signals SEL1 [1] to SEL1 [K] can be reduced. The difference can be reduced. Therefore, it is possible to reduce image quality disturbance based on the difference in delay amount between the first selection signals SEL1 [1] to SEL1 [K].
Further, the positional relationship among the first output unit 200a1, the second output unit 200a2, and the third output unit 200a3 is equal to the positional relationship between the fourth output unit 200b1, the fifth output unit 200b2, and the sixth output unit 200b3. The configuration of the first supply circuit 200a and the configuration of the second supply circuit 200b can be made the same. Therefore, the types of components of the electro-optical device 1 can be reduced.

  In the present embodiment, the dummy load 400 is provided on the electro-optical panel 100 that is an example of a display substrate. For this reason, it is not necessary to provide a new substrate dedicated to the dummy load, and the configuration can be downsized.

Note that variable resistors may be used as the resistors R1 and R2 shown in FIG. In this case, the adjustment of the resistance value of the variable resistor is performed by a resistance value instruction signal from the control circuit 500, for example. The resistance value instruction signal is output when the electro-optical device 1 is manufactured, and is held in a memory (not shown) provided in the dummy load 400. Thereafter, the resistance value of the variable resistor is determined by a resistance value instruction signal held in the memory.
A variable capacitor may be used as the capacitor C shown in FIG. Adjustment of the capacitance value of the variable capacitor is performed at the time of manufacture.

In the present embodiment, the N signal lines 14 are divided into J wiring groups B [j] with K continuous as one unit, but J wiring groups with K non-continuous as one unit. It may be divided into B [j]. For example, the signal lines 14 that belong to the wiring group B [joind] and the signal lines 14 that belong to the wiring group B [jeven] may be alternately arranged. Even in this case, it can be said that the wiring group B [joind] and the wiring group B [jeven] are an odd-numbered wiring group and an even-numbered wiring group. The first pixel and the second pixel are supplied with signals from the first supply circuit 200a and the second supply circuit 200b, respectively.
The first data signal and the first selection signal are signals supplied from the first supply circuit 200a, and the first signal line is a wiring to which a signal is supplied from the first supply circuit 200a. The second data signal and the second selection signal are signals supplied by the second supply circuit 200b, and the second signal line is a wiring to which a signal is supplied from the second supply circuit 200b. The first distribution unit and the second distribution unit distribute signals from the first supply circuit 200a and the second supply circuit 200b, respectively.

Second Embodiment
The electro-optical device 1 </ b> A according to the second embodiment employing the present invention is that the dummy load 400 is provided on the control board 600 on which the control circuit 500 is provided, in that the electro-optical device 1 according to the first embodiment. Is different.

FIG. 9 is a diagram illustrating an electro-optical device 1A according to the second embodiment. In FIG. 9, the same components as those shown in FIG. In FIG. 9, the first supply circuit 200a and the flexible circuit board 300a are omitted from the electro-optical device 1A for simplification of description.
In the electro-optical device 1 </ b> A, the dummy load 400 is provided on the control board 600 on which the control circuit 500 is provided.

  The fifth output unit 200b2 of the second supply circuit 200b is connected to the dummy load 400 through the wiring group L1 and the connector terminal 300b1 provided on the flexible circuit board 300b. The wiring group L1 has K wirings corresponding one-to-one with the second selection signals SEL2 [1] to SEL2 [K] output from the fifth output unit 200b2, and the K wirings are respectively The corresponding second selection signal SEL2 [k] is supplied to the connector terminal 300b1 connected to the dummy load 400.

  The sixth output unit 200b3 of the second supply circuit 200b is connected to the dummy load 400 via the wiring group L2 provided on the flexible circuit board 300b and the connector terminal 300b1. The wiring group L2 has K wirings corresponding one-to-one with the second selection signals SEL2 [1] to SEL2 [K] output from the sixth output unit 200b3, and the K wirings are respectively The corresponding selection signal SEL2 [k] is supplied to the connector terminal 300b1 connected to the dummy load 400.

According to this embodiment, since the dummy load 400 is provided on the control board 600, it is not necessary to provide a new board dedicated to the dummy load, and the configuration can be downsized.
Further, for example, if the dummy load 400 is configured with a variable resistor (for example, a variable resistor whose resistance value can be changed by an electronic volume) or a variable capacitor, the size of the load in the dummy load 400 can be adjusted. In this case, the resistance value of the variable resistor or the capacitance of the variable capacitor is set by the control circuit 500, for example. As a method for setting the resistance value of the variable resistor, for example, a method similar to the method described in the first embodiment is used.

<Third Embodiment>
The electro-optical device 1B according to the third embodiment adopting the present invention has an electro-optical device according to the first embodiment in that the dummy load 400 is provided on the flexible circuit board 300b on which the second supply circuit 200b is provided. Different from the device 1.

  FIG. 10 is a diagram illustrating an electro-optical device 1B according to the third embodiment. In FIG. 10, the same components as those shown in FIG. In FIG. 10, the first supply circuit 200a and the flexible circuit board 300a are omitted from the electro-optical device 1B for simplification of description.

  As shown in FIG. 10, in the electro-optical device 1B, the dummy load 400 is provided on the flexible circuit board 300b. Specifically, a flexible circuit board 400a provided with a dummy load 400 is mounted on the flexible circuit board 300b. Among the wirings of the flexible circuit board 300b, the wirings that transmit each of the second selection signals SEL2 [1] to SEL2 [K] output from the second supply circuit 200b are connected to the dummy load 400 in the flexible circuit board 400a. It is connected with the wiring.

  FIG. 11 is a diagram mainly showing the wirings L3 [1] to L3 [K] and the wirings L4 [1] to L4 [K] in the flexible circuit board 300b. The wiring L3 [k] transmits the second selection signal SEL2 [k] output from the fifth output unit 200b2 of the second supply circuit 200b. The wiring L4 [k] transmits the second selection signal SEL2 [k] output from the sixth output unit 200b3 of the second supply circuit 200b. The wiring L3 [k] is provided with a connection pad P1 [k], and the wiring L4 [k] is provided with a connection pad P2 [k].

FIG. 12 is a diagram showing a flexible circuit board 400a on which a dummy load 400 is provided.
The flexible circuit board 400a includes wirings L5 [1] to L5 [K] that correspond one-to-one with the wirings L3 [1] to L3 [K] of the flexible circuit board 300b, and the wiring L4 [1] of the flexible circuit board 300a. ] To L4 [K] are provided in a one-to-one correspondence with wirings L6 [1] to L6 [K]. The wirings L5 [1] to L5 [K] and the wirings L6 [1] to L6 [K] are connected to the dummy load 400.
The wiring L5 [k] is provided with a connection pad P3 [k] at a position facing the connection pad P1 [k] of the flexible circuit board 300b. The connection pads P3 [1] to P3 [K] correspond one-to-one with the connection pads P1 [1] to P1 [K].

  The connection pad P1 [k] is electrically connected to the connection pad P3 [k] by a conductive adhesive layer. In addition, the connection pad P2 [k] is electrically connected to the connection pad P4 [k] with a conductive adhesive layer.

According to the present embodiment, since the dummy load 400 is provided on the flexible circuit board 300b provided with the second supply circuit 200b, it is not necessary to provide a new substrate dedicated to the dummy load, and the configuration can be reduced in size. Is possible.
Further, it is not necessary to output the second selection signals SEL2 [1] to SEL2 [K] from the flexible circuit board 300b to the electro-optical panel 100 or the control board 600 via the connector terminals. Therefore, a connector terminal for transmitting the second selection signals SEL2 [1] to SEL2 [K] to the electro-optical panel 100 or the second selection signals SEL2 [1] to SEL2 [K] on the flexible circuit board 300b. It is not necessary to provide a connector terminal for transmitting the signal to the control board 600, and the number of connector terminals on the flexible circuit board 300b can be reduced.

<Fourth embodiment>
The electro-optical device 1C according to the fourth embodiment employing the present invention is different from the electro-optical device 1 according to the first embodiment in that a dummy load 400 is provided in the second supply circuit 200b.

  FIG. 13 is a diagram illustrating an electro-optical device 1 </ b> C according to the fourth embodiment. In FIG. 13, the same components as those shown in FIG. In FIG. 13, the first supply circuit 200a and the flexible circuit board 300a are omitted from the electro-optical device 1C for simplification of description.

In the electro-optical device 1C, the dummy load 400 is provided in the first supply circuit 200a and the second supply circuit 200b.
However, in the first supply circuit 200a, the dummy load 400 is connected to both the second output unit 200a2 and the third output unit 200a3 that are output terminals of the first selection signals SEL1 [1] to SEL1 [K]. Absent. Therefore, the first selection signals SEL1 [1] to SEL1 [K] are supplied to each distribution circuit 21 [j] without being supplied to the dummy load 400.
On the other hand, in the second supply circuit 200b, the dummy load 400 includes the fifth output unit 200b2 and the sixth output unit which are output terminals of the second selection signals SEL2 [1] to SEL2 [K] by the wiring of the flexible circuit board 300b. 200b3 is connected to both. For this reason, the second selection signals SEL2 [1] to SEL2 [K] are supplied (output) to the dummy load 400 without being supplied to each distribution circuit 21 [j].

14 and 15 are diagrams for explaining an example of the connection between the fifth output unit 200b2 and the dummy load 400 and the connection between the sixth output unit 200b3 and the dummy load 400. FIG.
Each of the first supply circuit 200a and the second supply circuit 200b is provided with connection pads P5 [1] to P5 [K] and P6 [1] to P6 [K] connected to the built-in dummy load 400. ing.
In the second supply circuit 200b, the output terminals 200b2 [1] to 200b2 [K] included in the fifth output unit 200b2 are connected by connection lines CL1 [1] to CL1 [K] provided on the flexible circuit board 300b, respectively. Output terminals 200b3 [1] -200b3 [K] connected to the connection pads P5 [1] -P5 [K] and included in the sixth output unit 200b3 are respectively connected to the flexible circuit board 300b. [1] to CL2 [K] are connected to the connection pads P6 [1] to P6 [K]. In other words, the output terminal 200b2 [k] is connected to the connection pad P5 [k] by the connection line CL1 [k], and the output terminal 200b3 [k] is connected to the connection pad P6 [k] by the connection line CL2 [k]. ] Connected.
The output terminal 200b2 [k] outputs the second selection signal SEL2 [k], and the output terminal 200b3 [k] outputs the second selection signal SEL2 [k].

  According to the present embodiment, the second supply circuit 200b includes the dummy load 400, and the second selection signals SEL2 [1] to SEL2 [K] are output to the dummy load 400 built in the second supply circuit 200b. There is no need to provide a new substrate dedicated to the load, and the configuration can be downsized. In addition, the output line for supplying the second selection signals SEL2 [1] to SEL2 [K] to the dummy load 400 can be shortened as compared with the case where the dummy load 400 is provided in a configuration different from the second supply circuit 200b. . If the dummy load 400 is configured with a variable resistor or a variable capacitor, the size of the load in the dummy load 400 can be adjusted. At this time, for example, when the resistance value of the variable resistor is set using a register included in the second supply circuit 200b, the load in the dummy load 400 can be finely adjusted. The resistance value is set in the register by the control circuit 500 when the electro-optical device 1C is started up, for example.

  Each of the first supply circuit 200a and the second supply circuit 200b is provided with connection pads P5 [1] to P5 [K] and P6 [1] to P6 [K], and the flexible circuit boards 300a and 300b are provided. Connection lines CL1 [1] to CL1 [K] and connection lines CL2 [1] to CL2 [K] are respectively provided, and each of the connection lines CL1 [1] to CL1 [K] and the connection line CL2 are provided. [1] to CL2 [K] are each provided with a switch, and the control circuit 500 turns off the switch provided on the flexible circuit board 300a and turns off the switch provided on the flexible circuit board 300b. It may be turned on. In this case, the configuration of the first supply circuit 200a and the configuration of the second supply circuit 200b can be made the same.

  Further, the dummy load 400 may be provided in the second supply circuit 200b without providing the dummy load 400 in the first supply circuit 200a. In this case, the flexible circuit board 300a is not provided with any of the connection lines CL1 [1] to CL1 [K] and the connection lines CL2 [1] to CL2 [K], and inside the second supply circuit 200b. A wiring for supplying the second selection signals SEL2 [1] to SEL2 [K] to the dummy load 400 may be provided.

<Modification>
Each of the above forms can be variously modified. Specific modifications are exemplified below. Two or more aspects arbitrarily selected from the following examples can be appropriately combined as long as they do not contradict each other.

<Modification 1>
In the above-described embodiment, as illustrated in FIGS. 1 and 2, a configuration in which the flexible circuit board 300 a and the flexible circuit board 300 b are attached so as to overlap each other when viewed from the display direction (z direction) of the electro-optical panel 100 is described. did. However, the present invention is not limited to such a configuration. For example, on the electro-optical panel 100, the connection terminal 300a1 with the flexible circuit board 300a and the connection terminal 300b1 with the flexible circuit board 300b may be arranged side by side in the lateral direction (x direction) of the electro-optical panel 100. In this case, the flexible circuit board 300a and the flexible circuit board 300b can be easily mounted on the electro-optical panel 100. However, in this example, the flexible circuit board 300a and the flexible circuit board 300b with respect to the pixel portion 10 are compared with the configuration in which the connection terminal 300a1 and the connection terminal 300b1 in FIGS. In some cases, the mounting area becomes larger, or the wiring connecting the pixel portion 10 and the mounting area becomes longer.

<Modification 2>
The first supply circuit 200a drives the distribution circuits 21 [1] to 21 [J / 2], and the second supply circuit 200b drives the distribution circuits 21 [(J / 2) +1] to 21 [J]. May be. In this case, since the distribution circuits 21 [1] to 21 [J / 2] and the distribution circuits 21 [(J / 2) +1] to 21 [J] are easily separated in position, the distribution circuit 21 [1] ˜21 [J] and the wiring between the first supply circuit 200a and the second supply circuit 200b can be simplified.

<Modification 3>
The number of wiring boards connected to the electro-optical panel 100 is not limited to two. Three or more wiring boards may be connected to the electro-optical panel 100. For example, even when three or more wiring boards are used, the output destination of the selection signal not used in the distribution circuit may be a dummy load.

<Modification 4>
Although a liquid crystal device is used as the electro-optical device, the electro-optical device may be any device having an electro-optical material whose optical properties change with electric energy. Note that the electro-optical material includes liquid crystal, organic EL (electroluminescence), and the like.

<Application example>
The electro-optical devices exemplified in the above embodiments and modifications can be used in various electronic devices. FIG. 16 illustrates a specific form of an electronic apparatus that employs the above-described electro-optical device.

  FIG. 16 is a schematic diagram of a projection display device (three-plate projector) 4000 to which the above-described electro-optical device is applied. The projection display device 4000 includes three electro-optical devices 1 (1R, 1G, 1B) corresponding to different display colors (red, green, blue). The illumination optical system 4001 supplies the red component r of the light emitted from the illumination device (light source) 4002 to the electro-optical device 1R, the green component g to the electro-optical device 1G, and the blue component b to the electro-optical device 1B. To supply. Each electro-optical device 1 functions as a light modulator (light valve) that modulates each monochromatic light supplied from the illumination optical system 4001 in accordance with a display image. The projection optical system 4003 synthesizes the emitted light from each electro-optical device 1 and projects it onto the projection surface 4004. By applying the electro-optical device 1 described above, a small projection display device 4000 capable of high-definition display can be easily realized.

  The electronic apparatus to which the electro-optical device according to the invention is applied includes, in addition to the apparatus illustrated in FIG. 16, a portable personal computer, a personal digital assistant (PDA), a digital still camera, a television, A video camera and a car navigation device are listed. Further, the electronic device includes an in-vehicle display (instrument panel), electronic notebook, electronic paper, calculator, word processor, workstation, videophone, POS terminal, printer, scanner, copying machine, video player, and touch panel. Equipment etc. are mentioned.

DESCRIPTION OF SYMBOLS 1 ... Electro-optical device, 10 ... Pixel part, 12 ... Scanning line, 14 ... Signal line, 20 ... Scanning line drive circuit, 21 [1] -21 [K] ... Distribution circuit, 200a ... 1st supply circuit, 200b ... Second supply circuit, 400 ... dummy load, 500 ... control circuit.

Claims (11)

A plurality of first signal lines belonging to the first signal line group are arranged corresponding to the intersections of the plurality of scanning lines and correspond to a first data signal supplied to the first signal line when the scanning line is selected. A plurality of first pixels for displaying gradation;
According to a second data signal arranged corresponding to each intersection of the plurality of second signal lines belonging to the second signal line group and the plurality of scanning lines and supplied to the second signal line when the scanning line is selected. A plurality of second pixels for displaying the gradation,
A first distribution unit that distributes the first data signal to the first signal line using a first selection signal;
A second distribution unit that distributes the second data signal to the second signal line using the first selection signal;
A first supply unit for supplying the first data signal and the first selection signal;
A second supply unit for supplying the second data signal and the second selection signal;
The electro-optical device, wherein the second supply unit outputs the second selection signal to a load unit. A plurality of scan lines;
A plurality of first signal lines;
A plurality of second signal lines;
Display corresponding to the first data signal provided corresponding to each of the intersections of the plurality of scanning lines and the plurality of first signal lines and supplied to the first signal line when the scanning line is selected is executed. A plurality of first pixels;
Display corresponding to the second data signal provided corresponding to each of the intersections of the plurality of scanning lines and the plurality of second signal lines and supplied to the second signal line when the scanning line is selected is executed. A plurality of second pixels;
A scanning line driving unit that sequentially selects each of the plurality of scanning lines;
A selection signal that controls distribution of the first data signal to the plurality of first signal lines and distribution of the second data signal to the plurality of second signal lines; and a first data signal that outputs the first data signal. 1 supply section;
A second supply unit for outputting the selection signal and the second data signal;
A first distribution unit that distributes the first data signal to the plurality of first signal lines using the selection signal output from the first supply unit;
A second distribution unit that distributes the second data signal to the plurality of second signal lines using the selection signal output from the first supply unit;
A dummy load that is supplied with the selection signal output from the second supply unit and reduces a difference between the load of the first supply unit and the load of the second supply unit;
An electro-optical device comprising: The first supply unit includes a first output unit that outputs the first data signal, and a second output unit and a third output unit that output the selection signal,
The first output unit is provided between the second output unit and the third output unit.
The electro-optical device according to claim 2. A first input for receiving the first data signal and the selection signal from the first supply;
An electro-optical panel provided with a second input unit that receives the second data signal from the second supply unit;
The plurality of scanning lines, the plurality of first signal lines, the plurality of second signal lines, the plurality of first pixels, the plurality of second pixels, the scanning line driving unit, and the first The one distribution unit and the second distribution unit are provided in the electro-optical panel,
The first distribution unit receives the first data signal and the selection signal via the first input unit,
The second distribution unit receives the selection signal through the first input unit, receives the second data signal through the second input unit,
The first input unit and the second input unit are arranged in the length direction of the first signal line.
The electro-optical device according to claim 2 or 3. The first input unit is provided closer to the first distribution unit side and the second distribution unit side than the second input unit,
The dummy load is provided between the first input unit and the first distribution unit and between the first input unit and the second distribution unit.
The electro-optical device according to claim 4.   The electro-optical device according to claim 2, further comprising a substrate on which the dummy load is provided.   The substrate includes the plurality of scanning lines, the plurality of first signal lines, the plurality of second signal lines, the plurality of first pixels, the plurality of second pixels, and the scanning line driving unit. The electro-optical device according to claim 6, wherein the electro-optical device is a display substrate provided with the first distribution unit and the second distribution unit.   The electro-optical device according to claim 6, wherein the substrate is a control substrate provided with a control unit that controls the first supply unit and the second supply unit.   The electro-optical device according to claim 6, wherein the substrate is a flexible circuit substrate provided with the second supply unit.   The electro-optical device according to claim 2, wherein the second supply unit includes the dummy load, and outputs the selection signal to the dummy load. An electronic apparatus comprising the electro-optical device according to claim 1.

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