JP2012168228A - Electro-optical device and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a layered structure formed on a substrate in an electro-optical device such as a liquid crystal device.SOLUTION: An electro-optical device comprises: a plurality of pixels arranged along a first direction (X direction) and a second direction (Y direction) crossing the first direction; a plurality of transistors (Tr) respectively provided correspondingly to the pixels; and a plurality of scanning lines (11) each provided correspondingly to a pixel group consisting of pixels disposed in a line along the first direction and each electrically connected to gate electrodes of transistors of the corresponding pixel group. Among the plurality of transistors, transistors provided in pixels adjacent to one another in the second direction are mutually serially connected, and the electro-optical device comprises an image signal supply part for supplying an image signal to transistors disposed at one end in the second direction among these mutually serially connected transistors.

Description

  The present invention relates to a technical field of an electro-optical device such as a liquid crystal device and an electronic apparatus such as a liquid crystal projector including the electro-optical device.

  In this type of electro-optical device, a pixel electrode for each pixel, a scanning line for selectively driving the pixel electrode, a data line, and a pixel switching TFT (Thin Film Transistor) ) Is formed as a laminated structure through an interlayer insulating film, and is configured to be capable of active matrix driving (see, for example, Patent Document 1). For example, as disclosed in Patent Document 1, generally, a TFT for pixel switching has its source electrically connected to a data line, its gate electrically connected to a scanning line, and its drain. Are electrically connected to the pixel electrode, and an image signal is supplied from the data line to the pixel electrode through the pixel switching TFT which is turned on in response to the scanning signal.

  By adopting the laminated structure as described above, the electro-optical device can display a high-definition image while being small.

JP 2008-191200 A

  However, in an electro-optical device having a laminated structure as described above, the configuration of the device becomes complicated due to an increase in the number of layers, which increases the complexity of the manufacturing process, prolongs the manufacturing period, and increases costs. There is a technical problem of being invited.

  The present invention has been made in view of, for example, the above-described problems. For example, an electro-optical device capable of simplifying a laminated structure on a substrate and an electronic apparatus including such an electro-optical device are provided. The issue is to provide.

  In order to solve the above problems, the electro-optical device of the present invention is provided with a plurality of pixels arranged along a first direction and a second direction intersecting the first direction, and corresponding to each of the pixels. A plurality of transistors, and a plurality of scanning lines provided for each pixel group composed of the pixels arranged along the first direction and electrically connected to the gate electrodes of the transistors, Among the transistors, the transistors provided in the pixels adjacent to each other in the second direction are electrically connected in series, and among the transistors connected in series with each other, an image is displayed on a transistor located at one end in the second direction. An image signal supply unit for supplying a signal is provided.

  According to the electro-optical device of the present invention, for example, in a display area (also referred to as a “pixel area”) on a substrate, a first direction (for example, a row direction or an X direction) and a second direction (for example, a column direction or a Y direction). A plurality of pixels are arranged in a matrix, for example, and one pixel electrode and one transistor, for example, are provided for each pixel. The plurality of scanning lines are provided for each pixel group (for example, a pixel row arranged along the row direction) including pixels arranged along the first direction in the display region on the substrate, for example. Each of the plurality of scanning lines is electrically connected in common to a gate electrode of a transistor provided in a pixel forming a corresponding pixel group (for example, a corresponding pixel row). The transistor is turned on or off when a predetermined first or second potential is supplied to the gate electrode from the scanning line driver circuit via the scanning line, for example.

  In the present invention, among the plurality of transistors, the transistors provided in the pixels adjacent to each other in the second direction are electrically connected in series to each other, and one of the transistors connected in series is positioned at one end in the second direction. An image signal is supplied to the transistor from the image signal supply unit.

  Thus, for example, first, a predetermined first potential is supplied to all of the plurality of scanning lines so that all of the transistors connected in series with each other are turned on, and then, in the second direction among the transistors connected in series with each other. By supplying a predetermined second potential to a plurality of scanning lines so that the transistors are turned off at predetermined intervals in order from the other end side different from the one end side to the one end side (that is, the first potential) By switching from the second potential to the second potential), the image signal to be written can be written in all of the plurality of pixels. Therefore, image display can be performed in a display area in which a plurality of pixels are arranged.

  Here, particularly in the present invention, the image signal from the image signal supply unit is supplied to each pixel through a part or all of the transistors connected in series with each other. It is not necessary to provide wiring (for example, data lines disclosed in Patent Document 1) for supplying an image signal so as to extend along the second direction in the display area. Therefore, it is possible to simplify the laminated structure on the substrate.

  As described above, according to the electro-optical device of the present invention, the laminated structure on the substrate can be simplified. As a result, the manufacturing process can be reduced and the yield can be improved. Further, the manufacturing cost can be reduced.

  In one aspect of the electro-optical device of the present invention, the image signal supply unit is positioned at the one end for each signal supply period that is predetermined as a period for supplying the image signal before a display period for performing display. A left-eye image signal and a right-eye image signal are alternately supplied to the transistor as the image signal.

  According to this aspect, the left-eye image signal and the right-eye image signal are alternately supplied in time division to the plurality of pixel electrodes during the signal supply period. For example, the left-eye image and the right-eye image are time-divisionally displayed in the display area. Displayed alternately. Therefore, for example, a user who alternately views the left-eye image and the right-eye image via the liquid crystal shutter glasses can make the stereoscopic image (three-dimensional image) visible. That is, according to this aspect, a time-division type stereoscopic display device can be realized.

  The “left-eye image signal” is an image signal corresponding to the left-eye image that the user should see with the left eye, and the “right-eye image signal” is an image signal corresponding to the right-eye image that the user should see with the right eye. is there.

  In another aspect of the electro-optical device according to the aspect of the invention, a predetermined first potential is supplied to all of the plurality of scanning lines so that all of the transistors connected in series to each other are turned on, and then the plurality of the scanning lines are connected in series. Among the connected transistors, the scanning lines are connected to the plurality of scanning lines so that the transistors are turned off at predetermined intervals in order from the other end side different from the one end in the second direction toward the one end side. A scanning line driving circuit for supplying a predetermined second potential different from the one potential is provided.

  According to this aspect, it is possible to reliably write the image signal to be written to all the pixel electrodes of the plurality of pixels. Therefore, the image to be displayed can be reliably displayed in the display area in which a plurality of pixels are arranged.

  In order to solve the above problems, an electronic apparatus according to the present invention includes the electro-optical device according to the present invention described above (including various aspects thereof).

  According to the electronic apparatus of the present invention, since the electro-optical device of the present invention described above is provided, a projection display device, a television, a mobile phone, an electronic notebook, a word processor, and a viewfinder type capable of performing high-quality display. Alternatively, various electronic devices such as a monitor direct-view video tape recorder, a workstation, a videophone, a POS terminal, and a touch panel can be realized. Also, as an electronic apparatus of the present invention, for example, an electrophoretic device such as electronic paper, an electron emission device (Field Emission Display and Conduction Electron-Emitter Display), and a display device using these electrophoretic device and electron emission device are realized. Is also possible.

  The effect | action and other gain of this invention are clarified from the form for implementing invention demonstrated below.

It is a top view which shows the structure of the liquid crystal device which concerns on 1st Embodiment. It is the II-II 'sectional view taken on the line of FIG. 1 is a circuit diagram illustrating an electrical configuration of a liquid crystal device according to a first embodiment. It is a timing chart which shows the relationship between the image signal in 1st Embodiment, and the opening / closing state of liquid-crystal shutter spectacles. 6 is a timing chart for explaining an image signal writing operation in the first embodiment. It is a top view which shows the structure of the projector which is an example of the electronic device to which the electro-optical apparatus is applied.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a case where the present invention is applied to a liquid crystal device functioning as a time-division type stereoscopic display device (that is, a three-dimensional (3D) display device) is taken as an example.

<First Embodiment>
The liquid crystal device according to the first embodiment will be described with reference to FIGS.

  First, the overall configuration of the liquid crystal device according to the present embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a plan view showing the configuration of the liquid crystal device according to the present embodiment, and FIG. 2 is a cross-sectional view taken along the line II-II ′ of FIG.

  1 and 2, the liquid crystal device 100 according to the present embodiment is configured as a 3D display device that displays a stereoscopic image by alternately displaying a right-eye image and a left-eye image in a time-division manner in the display region 10a. Yes. The user (viewer) can view the stereoscopic image by viewing the right-eye image and the left-eye image alternately displayed in a time-division manner on the display area 10a of the liquid crystal device 100 through the liquid crystal shutter glasses. It becomes. In place of the liquid crystal shutter glasses, mechanical shutter glasses, polarized shutter glasses, or the like may be used, or a shutter mechanism may be attached to the liquid crystal device 100.

  As shown in FIGS. 1 and 2, in the liquid crystal device 100, the TFT array substrate 10 and the counter substrate 20 are disposed to face each other. A liquid crystal layer 50 is sealed between the TFT array substrate 10 and the counter substrate 20, and the TFT array substrate 10 and the counter substrate 20 are sealed by a sealing material 52 provided in a seal region located around the display region 10a. They are glued together.

  In FIG. 1, a light-shielding frame light-shielding film 53 that defines the frame area of the display region 10a is provided on the counter substrate 20 side in parallel with the inside of the seal region where the seal material 52 is disposed. In the peripheral region, an image signal supply circuit 101 and an external circuit connection terminal 102 are provided along one side of the TFT array substrate 10 in a region located outside the seal region where the sealing material 52 is disposed. Further, the scanning line driving circuit 104 is provided so as to be covered with the frame light shielding film 53 inside the seal region along two sides adjacent to the one side. On the TFT array substrate 10, vertical conduction terminals 106 for connecting the two substrates with the vertical conduction material 107 are arranged in regions facing the four corner portions of the counter substrate 20. Thus, electrical conduction can be established between the TFT array substrate 10 and the counter substrate 20.

  On the TFT array substrate 10, a lead wiring 90 for electrically connecting the external circuit connection terminal 102 and the image signal supply circuit 101, the scanning line driving circuit 104, the vertical conduction terminal 106 and the like is formed. .

  In FIG. 2, on the TFT array substrate 10, a laminated structure in which wirings such as pixel transistors for pixel switching and scanning lines are formed is formed. In the display area 10a, pixel electrodes 9 are provided in a matrix on the upper layer of wiring such as pixel transistors and scanning lines. An alignment film is formed on the pixel electrode 9. On the other hand, a light shielding film 23 is formed on the surface of the counter substrate 20 facing the TFT array substrate 10. The light shielding film 23 is formed of, for example, a light shielding metal film or the like, and is patterned, for example, in a lattice shape in the display region 10a on the counter substrate 20. A counter electrode 21 made of a transparent conductive material such as ITO (Indium Tin Oxide) is formed in a solid shape on the light shielding film 23 so as to face the plurality of pixel electrodes 9. An alignment film is formed on the counter electrode 21. Further, the liquid crystal layer 50 is made of, for example, a liquid crystal in which one or several types of nematic liquid crystals are mixed, and takes a predetermined alignment state between the pair of alignment films.

  Although not shown here, in addition to the image signal supply circuit 101 and the scanning line driving circuit 104, the TFT array substrate 10 is used for inspecting the quality, defects, etc. of the liquid crystal device during manufacturing or at the time of shipment. An inspection circuit, an inspection pattern, or the like may be formed.

  Next, the electrical configuration of the liquid crystal device 100 will be described with reference to FIG.

  FIG. 3 is a circuit diagram showing an electrical configuration of the liquid crystal device 100 according to the present embodiment.

  3, the liquid crystal device 100 according to the present embodiment includes a plurality of pixels 900 and m scanning lines 11 (that is, scanning lines G1, G2,..., Gm) in a display region 10a of the TFT array substrate 10. It has.

  The pixels 900 are arranged in a matrix in the display area 10a along the X direction and the Y direction. More specifically, the pixels 900 are two-dimensionally arranged in a matrix of m rows × n columns. That is, the pixels 900 are arranged in a matrix of the first column, the second column,..., The nth column from the left side in the display area 10a, and the first row, the second row,. .

  The m scanning lines 11 are provided for each pixel row including the pixels 900 arranged along the X direction. Specifically, the scanning line G1 is provided corresponding to the pixels 900 forming the first row, the scanning line G2 is provided corresponding to the pixels 900 forming the second row,... It is provided corresponding to the pixel 900 forming the m-th row. Each of the m scanning lines 11 is formed to extend along the X direction.

  The pixel 900 includes a pixel transistor Tr, a liquid crystal capacitor Clc, and a storage capacitor Cs. In the present embodiment, the pixel transistor Tr of the pixel 900 in the i-th row and k-th column (where i = 1,..., M, k = 1,..., N) is appropriately referred to as “pixel transistor Trik”. The storage capacitor Cs of the pixel 900 in the i-th row and the k-th column (where i = 1,..., m, k = 1,..., n) is appropriately referred to as “storage capacitor Csik”.

  The liquid crystal capacitance Clc is a capacitance due to the pixel electrode 9, the counter electrode 21, and the liquid crystal layer 50 (see FIG. 2). A predetermined reference potential Vcom (for example, 7 volts) is supplied to the counter electrode 21.

  The pixel transistor Tr is an N-channel or P-channel TFT as an example of the “transistor” according to the present invention. The drain of the pixel transistor Tr is electrically connected to one end of each of the liquid crystal capacitor Clc and the storage capacitor Cs. More specifically, the drain of the pixel transistor Tr is a pixel potential side capacitor electrically connected to the pixel electrode 9 of the pair of capacitor electrodes constituting the pixel electrode 9 constituting the liquid crystal capacitor Clc and the storage capacitor Cs. It is electrically connected to the electrode. The gate of the pixel transistor Tr is electrically connected to the scanning line 11. More specifically, the gate of the pixel transistor Tr of the pixel 900 in the i-th row (where i = 1,..., M) is the i-th scanning line Gi (where i = 1,..., M). Is electrically connected. That is, the gates of the pixel transistors Tr11, Tr12,..., Tr1n are electrically connected in common to the scanning line G1, and the gates of the pixel transistors Tr21, Tr22,. The gates of the pixel transistors Trm1, Trm2,..., Trmn are electrically connected in common to the scanning line Gm. The pixel transistor Tr is switched on and off by a scanning signal supplied from the scanning line driving circuit 104.

  Particularly in the present embodiment, the pixel transistors Tr provided in the pixels 900 adjacent in the Y direction are electrically connected in series with each other. In other words, the pixel transistors Tr of the pixels 900 in the i-th column are connected in series. That is, the pixel transistors Tr11, Tr21,..., Trm1 are connected in series with each other, the pixel transistors Tr12, Tr22,. It is connected. More specifically, for example, the source of the pixel transistor Tr11 and the drain of the pixel transistor Tr21 are electrically connected to each other, the source of the pixel transistor Tr21 and the drain of the pixel transistor Tr31 are electrically connected to each other,. The source of the pixel transistor Tr (m−1) 1 and the drain of the pixel transistor Trm1 are electrically connected to each other.

  The storage capacitor Cs is electrically connected in parallel with the liquid crystal capacitor Clc in order to prevent the held image signal from leaking.

  One of the pair of capacitor electrodes constituting the storage capacitor Cs is electrically connected to the drain of the pixel transistor Tr. A predetermined reference potential Vcom is supplied to the other of the pair of capacitor electrodes constituting the storage capacitor Cs.

  3, the liquid crystal device 100 according to the present embodiment includes a driving circuit (including a scanning line driving circuit 104 and an image signal supply circuit 101 in a peripheral region located around the display region 10 a on the TFT array substrate 10. Alternatively, a peripheral circuit) is provided. The image signal supply circuit 101 is an example of the “image signal supply unit” according to the present invention.

  The scanning line driving circuit 104 outputs a high potential VH or a low potential VL to the scanning line 11 as a scanning signal so that the pixel transistor Tr is switched on and off at a predetermined timing.

  The image signal supply circuit 101 supplies the image signal VID related to the image to be displayed in the display area 10a to the signal line 6 (that is, the signal line S1) electrically connected to the source of the pixel transistor Tr of the pixel 900 in the m-th row. , S2,... Sn). The signal line Si (where i = 1, 2,..., N) is formed to extend from the image signal supply circuit 101 to the pixel transistor Trmi of the pixel 900 in the m-th row and i-th column along the Y direction. Yes. The image signal supply circuit 101 supplies the right eye image signal related to the right eye image and the left eye image signal related to the left eye image to the signal line 6 alternately in a time division manner as the image signal VID. Further, in the present embodiment, in order to prevent so-called “liquid crystal burn-in”, a polarity inversion driving method is adopted, and the image signal is higher than the reference potential Vcom (for example, 7 volts) in a predetermined cycle. The polarity is inverted between the positive polarity on the side and the negative polarity on the lower side. In other words, a positive potential (that is, a positive field potential, for example, 12 volts) and a negative potential (that is, a negative field potential, for example, 2 volts) are alternately supplied to each pixel 900. The image signal supply circuit 101 supplies the image signal VID to the signal lines S1, S2,. The image signal supply circuit 101 may supply the image signal VID for each group to a plurality of adjacent signal lines 6.

  Next, the operation of the liquid crystal device 100 will be described with reference to FIGS.

  FIG. 4 is a timing chart showing the relationship between the image signal and the open / close state of the liquid crystal shutter glasses in the present embodiment. FIG. 4 shows changes over time in the image signal, changes over time in the open / closed state of the right (R side) shutter of the liquid crystal shutter glasses, and changes over time in the open / closed state of the left (L side) shutter of the liquid crystal shutter glasses. Changes are shown. In FIG. 4, for each of the right shutter and the left shutter, the open state is indicated by a white (blank) portion, and the closed state is indicated by a hatched portion.

  In FIG. 4, during the operation of the liquid crystal device 100, first, in the period T1, a positive right eye image signal (“R +” in the drawing) is written in all pixels 900 in a predetermined order as an image signal. An image signal writing operation for writing an image signal to the pixel 900 will be described later with reference to FIG. In this period T1, both the right shutter and the left shutter are in a closed state (that is, a light non-transmissive state that does not transmit light). That is, the period T1 is a period for supplying an image signal to all the pixels 900, and is a period in which the user does not view the video displayed in the display area 10a. Next, in the period T2, the positive right-eye image signal is held in all the pixels 900. In this period T2, the right shutter is in an open state (that is, a light transmitting state that transmits light), and the left shutter is in a closed state. That is, the period T2 is a period during which the user views the right-eye image displayed in the display area 10a. Note that the image signal supply circuit 101 does not supply the image signal to the signal line 6 in the period T2. Next, in the period T <b> 3, a negative left-eye image signal (“L−” in the drawing) is written as an image signal in all the pixels 900 in a predetermined order. In this period T3, as in the period T1, both the right shutter and the left shutter are closed. That is, the period T3 is a period for supplying an image signal to all the pixels 900, similarly to the period T1. Next, in the period T <b> 4, the negative left-eye image signal is held in all the pixels 900. In this period T4, the right shutter is closed and the left shutter is opened. That is, the period T4 is a period during which the user views the left-eye image displayed in the display area 10a. Next, in the period T <b> 5, a negative-polarity right-eye image signal (“R−” in the figure) is written as an image signal in all the pixels 900 in a predetermined order. In this period T5, as in the period T1, both the right shutter and the left shutter are closed. That is, the period T5 is a period for supplying an image signal to all the pixels 900, similarly to the period T1. Next, in the period T <b> 6, the negative right eye image signal is held in all the pixels 900. In this period T6, the right shutter is opened and the left shutter is closed. The period T6 is a period during which the user views the right-eye image displayed in the display area 10a. Next, in a period T7, a positive left-eye image signal (“L +” in the figure) is written as an image signal in all the pixels 900 in a predetermined order. In this period T7, as in the period T1, both the right shutter and the left shutter are closed. That is, the period T7 is a period for supplying an image signal to all the pixels 900, similarly to the period T1. Next, in the period T <b> 8, a positive left-eye image signal is held in all the pixels 900. In this period T8, the right shutter is closed and the left shutter is opened. The period T8 is a period during which the user views the left-eye image displayed in the display area 10a. After the period T8, the same operation as the above-described periods T1 to T8 is repeated. For example, in a period T9 subsequent to the period T8, as in the period T1, a positive right-eye image signal is written as an image signal in all the pixels 900 in a predetermined order.

  As described above, in this embodiment, the image signal is sequentially supplied to all the pixels 900, and both the right shutter and the left shutter are closed (in the example of FIG. 4, the periods T1, T3, (T5, T7, T9) and a period in which the supply of the image signal to the pixel 900 is stopped and one of the right shutter and the left shutter is opened and the other is closed (in the example of FIG. 4, the period T2, T4, T6, T8) are repeated alternately. Therefore, the video displayed in the display area 10a is not shown to the user while the image signals held in the plurality of pixels 900 are being rewritten (that is, during a period in which the image signals are sequentially supplied to all the pixels 900). The right-eye image and the left-eye image can be alternately shown to the user through the liquid crystal shutter glasses at a predetermined cycle, and the stereoscopic video can be visually recognized by the user.

  As described above, the right-eye image signal and the left-eye image signal are supplied to the plurality of pixels 900 alternately in a time division manner as image signals. Here, in this embodiment, in particular, the polarity is inverted for each image signal for the same eye. That is, for example, the image signal supply circuit 101 supplies the right-eye image signal again (for example, the period T5) after supplying the positive-polarity right-eye image signal (for example, after the period T1), When supplying the right-eye image signal as the negative-polarity image signal and supplying the negative-right-eye image signal (for example, after the period T5) and then supplying the right-eye image signal (for example, the period T9) The right-eye image signal is supplied as a positive polarity image signal. Further, the image signal supply circuit 101 supplies the left-eye image signal after supplying the negative-polarity left-eye image signal (for example, after the period T3), when supplying the left-eye image signal (for example, the period T7). When the signal is supplied as a positive image signal and the left eye image signal is supplied after the positive left eye image signal is supplied, the left eye image signal is supplied as a negative image signal. Therefore, the so-called “liquid crystal burn-in” in the display area 10a can be effectively prevented.

  FIG. 5 is a timing chart for explaining the image signal writing operation in the present embodiment. In FIG. 5, the temporal change of the image signal supplied to the signal line S1, the temporal change of each potential of the scanning lines G1, G2,..., Gm, and the storage capacitors Cs11, Cs21,. The change over time of the image signal is shown.

  3 and 5, the image signal writing operation of the liquid crystal device 100 is a period during which both the right shutter and the left shutter of the liquid crystal shutter glasses are closed as described above with reference to FIG. 4 (for example, FIG. 4). In the example of FIG. 4, it is performed every period T1, T3, T5, T7, T9), and one of the right shutter and the left shutter of the liquid crystal shutter glasses is opened (for example, the period T2 in the example of FIG. 4). , T4, T6, T8).

  In the image signal writing operation, first, a high potential VH is supplied as a scanning signal to all of the scanning lines G1, G2,..., Gm by the scanning line driving circuit 104 and the image signal VID1 to be written to the pixels 900 in the first row. Are sequentially supplied to the signal lines S1, S2,..., Sn by the image signal supply circuit 101 (more specifically, an image signal to be written to the pixel 900 in the first row and i-th column is supplied to the signal line Si. ). As a result, the pixel transistors Tr of all the pixels 900 are turned on, and the image signal VID1 supplied to the signal line Si is written to all of the pixels 900 forming the i-th column. For example, as shown in FIG. 5, the image signal VID1 supplied to the signal line S1 is written in the storage capacitors Cs11, Cs21,..., Csm1. Here, since all of the pixel transistors Tr11, Tr21,..., Trm1 connected in series with each other are in the ON state, the image signal VID1 is stored in the storage capacitor via the pixel transistors Tr11, Tr21,. Can be written to Cs11. 5, illustration of image signals supplied to the signal lines S2,..., Sn, and image signals held in the storage capacitors Cs of the pixels 900 forming the second to nth columns is omitted.

  Next, after a predetermined period has elapsed (that is, after the image signal VID1 is written to all the pixels 900 by sequentially supplying the image signal VID1 to the signal lines S1, S2,..., Sn), the signal is supplied to the scanning line G1. The scanning signal is switched from the high potential VH to the low potential VL, and the image signal VID2 to be written to the pixels 900 in the second row is sequentially supplied to the signal lines S1, S2,. More specifically, an image signal to be written to the pixel 900 in the second row and i column is supplied to the signal line Si). At this time, the scanning signal supplied to the scanning lines G2,..., Gm is maintained at the high potential VH. Thereby, the pixel transistors Tr (that is, the pixel transistors Tr11, Tr12,..., Tr1n) of the pixels 900 in the first row are turned off, and the pixel transistors Tr in the second row to the m-th row are turned on. Therefore, the image signal VID2 supplied to the signal line Si is written from the second row to the m-th row of pixels 900 among the pixels 900 forming the i-th column, and is also held in the first row of pixels 900. VID1 is maintained as it is. For example, as shown in FIG. 5, the image signal VID2 supplied to the signal line S1 is written in the storage capacitors Cs21,..., Csm1, but is not written in the storage capacitor Cs11, and the storage capacitor Cs11 stores the image to be held. The signal VID1 remains held. Here, among the pixel transistors Tr11, Tr21,..., Trm1 connected in series with each other, only Tr11 is in the off state and all others are in the on state, so that the image signal VID2 is converted into the pixel transistors Tr21, ... can be written into the storage capacitor Cs21 via Trm1, and the state in which the storage capacitor Cs11 holds the image signal VID1 can be maintained.

  Next, after a predetermined period has elapsed (that is, after the image signal VID2 is written to the pixels 900 from the second row to the m-th row by sequentially supplying the image signal VID2 to the signal lines S1, S2,..., Sn) The scanning signal supplied to the scanning line G2 is switched from the high potential VH to the low potential VL, and the image signal VID3 to be written to the pixels 900 in the third row is supplied by the image signal supply circuit 101 to the signal lines S1, S2,. (More specifically, an image signal to be written to the pixel 900 in the third row and i-th column is supplied to the signal line Si). At this time, the scanning signal supplied to the scanning line G1 is maintained at the low potential VL, and the scanning signal supplied to the scanning lines G3,... Gm is maintained at the high potential VH. As a result, the pixel transistors Tr of the pixels 900 in the first and second rows are turned off, and the pixel transistors Tr in the third to m-th rows are turned on. Therefore, the image signal VID3 supplied to the signal line Si is written to the pixels 900 in the third row to the m-th row among the pixels 900 forming the i-th column, and held in the pixels 900 in the first row and the second row. The image signal is maintained as it is. For example, as shown in FIG. 5, the image signal VID3 supplied to the signal line S1 is written in the storage capacitors Cs31,..., Csm1, but not written in the storage capacitors Cs11 and C21, and the storage capacitor Cs11 should be held. The image signal VID1 is held and the storage capacitor C21 holds the image signal VID2 to be held. Here, among the pixel transistors Tr11, Tr21,..., Trm1 connected in series with each other, only Tr11 and Tr21 are in the off state and all others are in the on state, so that the image signal VID3 is connected to the pixel transistors connected in series with each other. .., Trm1 can be written to the storage capacitor Cs31, and the storage capacitor Cs11 can hold the image signal VID1 and the storage capacitor Cs21 can hold the image signal VID2.

  Thereafter, similarly, the scanning signals supplied to the scanning lines G3,..., Gm-1 are sequentially switched from the high potential VH to the low potential VL every time a predetermined period elapses. The image signal to be written in 900 is sequentially written for each pixel row.

  As described above, when the image signal is written in the pixel 900, the scanning line driving circuit 101 first applies the scanning signal to all the m scanning lines 11 so that all the pixel transistors Tr connected in series to each other are turned on. As a high potential VH, and then sequentially from the pixel transistors Tr of the pixels 900 in the first row to the pixel transistors Tr of the pixels 900 in the (m−1) th row among the pixel transistors Tr connected in series. The scanning signal is switched from the high potential VH to the low potential VL so that the pixel transistor Tr is turned off every predetermined period. Thereby, the image signal to be written can be reliably written in all of the plurality of pixels 900 arranged in the display area 10a, and the image to be displayed in the display area 10a can be reliably displayed.

  In the present embodiment, in particular, the image signal from the image signal supply unit 101 is supplied to the pixel electrode 9 of each pixel 900 via a part or all of the pixel transistors Tr connected in series. Therefore, for example, it is not necessary to provide wiring for supplying an image signal (for example, a data line disclosed in Patent Document 1) in the display area 10a on the TFT array substrate 10 so as to extend along the Y direction. Therefore, it is possible to simplify the laminated structure on the TFT array substrate 10.

  As described above, according to the liquid crystal device 100 according to the present embodiment, the stacked structure on the TFT array substrate can be simplified. As a result, the manufacturing process can be reduced and the yield can be improved. Further, the manufacturing cost can be reduced. Further, according to the liquid crystal device 100 according to the present embodiment, a stereoscopic image can be visually recognized by the user. In addition, liquid crystal burn-in can be effectively prevented.

<Electronic equipment>
Next, the case where the above-described liquid crystal device, which is an electro-optical device, is applied to various electronic devices will be described.

  FIG. 6 is a plan view illustrating a configuration example of the projector. Hereinafter, a projector using the liquid crystal device as a light valve will be described.

  As shown in FIG. 6, a lamp unit 1102 including a white light source such as a halogen lamp is provided inside the projector 1100. The projection light emitted from the lamp unit 1102 is separated into three primary colors of RGB by four mirrors 1106 and two dichroic mirrors 1108 arranged in the light guide 1104, and serves as a light valve corresponding to each primary color. The light enters the liquid crystal panels 1110R, 1110B, and 1110G.

  The configurations of the liquid crystal panels 1110R, 1110B, and 1110G are the same as those of the liquid crystal device described above, and are driven by R, G, and B primary color signals supplied from the image signal processing circuit. The light modulated by these liquid crystal panels enters the dichroic prism 1112 from three directions. In the dichroic prism 1112, R and B light is refracted at 90 degrees, while G light travels straight. Therefore, as a result of the synthesis of the images of the respective colors, a color image is projected onto the screen or the like via the projection lens 1114.

  Here, paying attention to the display images by the liquid crystal panels 1110R, 1110B, and 1110G, the display image by the liquid crystal panel 1110G needs to be horizontally reversed with respect to the display images by the liquid crystal panels 1110R and 1110B.

  In addition, since light corresponding to each primary color of R, G, and B is incident on the liquid crystal panels 1110R, 1110B, and 1110G by the dichroic mirror 1108, it is not necessary to provide a color filter.

  In addition to the electronic devices described with reference to FIG. 6, mobile personal computers, mobile phones, liquid crystal televisions, viewfinder type, monitor direct-view type video tape recorders, car navigation devices, pagers, electronic Examples include notebooks, calculators, word processors, workstations, videophones, POS terminals, and devices with touch panels. Needless to say, the present invention can be applied to these various electronic devices.

  In addition to the liquid crystal devices described in the above embodiments, the present invention includes a reflective liquid crystal device (LCOS), a plasma display (PDP), a field emission display (FED, SED), an organic EL display, and a digital micromirror device. (DMD), electrophoresis apparatus and the like are also applicable.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit or idea of the invention that can be read from the claims and the entire specification, and an electro-optical device with such a change. In addition, an electronic apparatus including the electro-optical device is also included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 6 ... Signal line, 9 ... Pixel electrode, 10 ... TFT array substrate, 10a ... Display area, 11 ... Scanning line, 20 ... Counter substrate, 21 ... Counter electrode, 50 ... Liquid crystal layer, 101 ... Image signal supply circuit, 104 ... Scan line driving circuit, 900... Pixel, Clc... Liquid crystal capacitor, Cs... Storage capacitor, Tr.

Claims (4)

A plurality of pixels arranged along a first direction and a second direction intersecting the first direction;
A plurality of transistors provided corresponding to each pixel, and
A plurality of scanning lines provided for each pixel group consisting of the pixels arranged along the first direction and electrically connected to the gate electrodes of the transistors,
The transistors provided in the pixels adjacent to each other in the second direction among the plurality of transistors are electrically connected to each other in series.
An electro-optical device, comprising: an image signal supply unit that supplies an image signal to a transistor located at one end in the second direction among the transistors connected in series to each other.   The image signal supply unit supplies a left-eye image as the image signal to the transistor located at the one end for each signal supply period that is predetermined as a period for supplying the image signal before a display period for performing display. 2. The electro-optical device according to claim 1, wherein the signal and the image signal for the right eye are alternately supplied.   A predetermined first potential is supplied to all of the plurality of scanning lines so that all of the transistors connected in series to each other are turned on, and then the transistors in the second direction among the transistors connected in series are connected. A predetermined second potential different from the first potential is supplied to the plurality of scanning lines so that the transistor is turned off at predetermined intervals in order from the other end side different from the one end side toward the one end side. The electro-optical device according to claim 1, further comprising a scanning line driving circuit configured to perform the scanning line driving circuit.   An electronic apparatus comprising the electro-optical device according to claim 1.

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