JP5003066B2 - Electro-optical device and electronic apparatus including the same - Google Patents

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 an electro-optical device such as a liquid crystal device that performs display in the hold mode, an afterimage in human vision is noticeable when displaying a moving image compared to a display device that performs display in an impulse mode such as a CRT (Cathode Ray Tube). In many cases, a moving image blur in which the edge of the moving object image appears blurred in the display image is generated. In order to reduce such blurring of moving images, there is a technique for artificially setting an impulse mode by modifying the drive waveform for driving the electro-optical device (see, for example, Patent Document 1 and Non-Patent Document 1). Specifically, for example, Patent Document 1 discloses a technique for reducing afterimages during moving image display by controlling the turning on and off of the backlight. For example, in Non-Patent Document 1, an original image for one screen to be displayed is displayed as two images, a brighter image and a darker image than the original image, so that the pseudo impulse mode can be achieved without reducing the brightness. A technique for realizing the above is disclosed.

JP 2003-50569 A Hitachi Display Co., Ltd. News Release April 10, 2006 “Development of“ Flexible BI ”, a New Video Support Technology for IPS LCD Panels for Digital TV” (http://www.hitachi.co.jp/New/cnews/month /2006/04/0410a.html)

  However, according to the technique disclosed in Patent Document 1, since the backlight is repeatedly turned on and off, moving image blur is reduced, but the luminance of each pixel that displays an image must be sacrificed. There is a problem. Further, according to the technique disclosed in Non-Patent Document 1, since the average luminance of two images having different brightness (luminance) is displayed so as to be the same as the luminance of the original image, 2 from the original image is displayed. There is a technical problem that the process of generating one image may be complicated.

  The present invention has been made in view of, for example, the above-described problems, and includes an electro-optical device that can reduce moving image blur without reducing the brightness of the entire image, and various types including such an electro-optical device. It is an object to provide an electronic device.

  In order to solve the above problems, an electro-optical device of the present invention includes a display unit having a plurality of pixel units arranged in a display region, and a series of frame images constituting a moving image to be displayed in the display region. The frame image is displayed in the display area in one subframe period obtained by dividing a preset frame period corresponding to the above, and in another subframe period obtained by dividing the frame period, Driving means for driving the display unit by supplying an image signal to the plurality of pixel units so that a grayscale inverted image obtained by inverting the grayscale of the frame image is displayed in the display region;

  In the electro-optical device of the present invention, the display unit is, for example, a liquid crystal panel in which a liquid crystal that is an example of an electro-optical material is sandwiched between a pair of substrates. The display unit includes, for example, a plurality of pixel units arranged in a plane in a matrix, for example, in a display area on a substrate. Each of the plurality of pixel portions includes, for example, an electronic element such as a thin film transistor (TFT), a pixel electrode, and the like.

  According to the electro-optical device of the present invention, during the operation, the plurality of pixel units are driven by the driving unit, and image display in the hold mode is performed in the display area according to the image signal.

  In the case of such driving, in the present invention, in particular, in one sub-frame period obtained by dividing a predetermined frame period (for example, 1/60 seconds) corresponding to each of a series of frame images constituting a moving image. The frame image is displayed in the display area, and in the other sub-frame period obtained by dividing the frame period, the gradation inverted image obtained by inverting the gradation of the frame image is displayed in the display area. That is, in the display area, a frame image is displayed in one subframe period of the frame period, and a grayscale inverted image is displayed in another subframe period of the frame period.

  The “gradation-reversed image” according to the present invention is an image in which the gradation or luminance of the frame image is inverted, that is, a so-called negative image, but is generally more comprehensive than an image in which the gradation of the frame image is inverted. The idea is to include bright or dark images.

  More specifically, when the moving image is composed of a series of frame images of a first frame image, a second frame image,..., The display area includes, for example, the first frame image, the first frame image, and the like. A first gradation inverted image obtained by inverting the gradation of the frame image, a second frame image, a second gradation inverted image obtained by inverting the gradation of the second frame image,. The grayscale inverted image is displayed alternately. That is, a series of frame images are displayed while the gradation inverted image is inserted between successive frame images.

  Here, if each frame image is displayed as it is in the display area, for example, it is arranged at the edge of the moving object image in the moving image displayed in the display area, that is, at a position corresponding to the edge of the plurality of pixel portions. The luminance of the pixel portion that has been changed greatly between successive frame images, resulting in motion blur (that is, a visual afterimage). In order to reduce such moving image blur, for example, when a black image is inserted and displayed between successive frame images, the luminance of the pixel portion is sacrificed, and the moving image configured by a series of frame images The brightness of the image is relatively lowered. Furthermore, with such a relative decrease in the brightness of the moving image, the contrast of the moving image also decreases relatively.

  However, in the present invention, in particular, a series of frame images are displayed by the drive means while a gradation inverted image is inserted between successive frame images. Therefore, moving image blur can be reduced without relatively reducing the brightness and contrast of a moving image as compared with the case where a black image is inserted and displayed between successive frame images as described above. In other words, due to the presence of a tone-reversed image inserted between successive frame images, display in a pseudo impulse mode is performed as in the case where a black image is inserted between successive frame images as described above. Can be achieved, and motion blur can be reduced. Furthermore, since the gradation-reversed image is brighter than the black image except when the frame image is a complete white image, it is compared with the case where the black image is inserted and displayed between successive frame images as described above. Thus, it is possible to suppress a decrease in brightness and contrast of the moving image.

  Therefore, according to the electro-optical device of the present invention, even when the display operation is performed in the hold mode, moving image blur can be reduced while maintaining the brightness and contrast of the moving image, and a high-quality moving image can be displayed. It is.

  In one aspect of the electro-optical device of the present invention, the one subframe period is longer than the other subframe period.

  According to this aspect, in each frame period, the frame image is displayed in the display area for a longer time than the grayscale inverted image. Therefore, when the gradation-reversed image is displayed in the display area, the moving-image blur is generated with little or practically no disturbance of the moving image such as the gradation of the moving image to be displayed being reversed. Can be reduced.

  In another aspect of the electro-optical device according to the aspect of the invention, the driving unit inverts the polarity of the image signal between a high-side positive polarity and a low-side negative polarity with respect to a predetermined potential for each frame period.

  According to this aspect, in the image signal, the frame signal component corresponding to the frame image and the gradation inverted signal component corresponding to the gradation inverted image of the image signal have the same polarity in each frame period, The polarity is inverted every frame period. Therefore, it is possible to suppress or prevent the occurrence of bias in polarity for each frame image or each gradation-reversed image.

  In order to solve the above-described problems, an electronic apparatus according to the present invention includes the above-described electro-optical device according to the present invention (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, capable of performing high-quality moving image display, Various electronic devices such as a word processor, a viewfinder type or a monitor direct-view type video tape recorder, a workstation, a videophone, a POS terminal, and a touch panel can be realized. In addition, 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 operation and other advantages of the present invention will become apparent from the best mode for carrying out the invention described below.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the electro-optical device according to the present invention is applied to a liquid crystal device of a TFT active matrix driving type.
<First Embodiment>
First, the configuration and operation of the entire electro-optical device according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a block diagram of the electro-optical device according to the present embodiment. FIG. 2 is a diagram illustrating various types of pixel units formed in a matrix that form an image display region that is a display region of the electro-optical device. It is an equivalent circuit such as an element or wiring.

  In FIG. 1, the electro-optical device according to the present embodiment includes a display unit 10c and an image signal processing circuit 170, and is configured to receive image data DATA and a synchronization signal Ss from a video source 180. The display unit 10c includes an electro-optical panel 100P, a scanning line driving circuit 104, and a data line driving circuit 101. The scanning line driving circuit 104, the data line driving circuit 101, and the image signal processing circuit 170 constitute an example of the “driving means” according to the present invention.

  The plurality of pixel portions 10p are planarly arranged in a matrix in the image display region 10a as an example of the “display region” according to the present invention in the electro-optical panel 100P.

  As shown in FIG. 2, a pixel electrode 9a and a TFT 30 for switching control of the pixel electrode 9a are formed in each of the plurality of pixel portions of the electro-optical panel 100P. A data line 6 a to which image signals S 1, S 2,..., Sn are supplied is electrically connected to the source of the TFT 30. The image signals S1, S2,..., Sn written to the data lines 6a may be supplied line-sequentially in this order, or may be supplied for each group to a plurality of adjacent data lines 6a. Good.

  Further, the gate electrode is electrically connected to the gate of the TFT 30, and the scanning signals G1, G2,..., Gm are applied to the scanning line 3a and the gate electrode in a pulse sequential manner in this order at a predetermined timing. It is configured as follows. The pixel electrode 9a is electrically connected to the drain of the TFT 30, and the image signal S1, S2,..., Sn supplied from the data line 6a is obtained by closing the switch of the TFT 30 as a switching element for a certain period. Write at a predetermined timing.

  A predetermined level of image signals S1, S2,..., Sn written in the liquid crystal as an example of the electro-optical material via the pixel electrode 9a is formed between the counter electrode and the common electrode LCCOM. Is held for a certain period. The liquid crystal modulates light and enables gradation display by changing the orientation and order of the molecular assembly depending on the applied voltage level. In the normally white mode, the transmittance for incident light is reduced according to the voltage applied in units of each pixel, and in the normally black mode, the light is incident according to the voltage applied in units of each pixel. The light transmittance is increased, and light having a contrast corresponding to the image signal is emitted from the electro-optical device as a whole.

  In order to prevent the image signal held here from leaking, a storage capacitor 70 is added in parallel with the liquid crystal capacitor formed between the pixel electrode 9a and the counter electrode. One electrode of the storage capacitor 70 is provided in line with the scanning line 3a, and is electrically connected to the capacitor line 300 having the common potential LCCOM, and functions as a fixed potential side capacitor electrode. The other electrode of the storage capacitor 70 is electrically connected to the pixel electrode 9a and functions as a pixel potential side capacitor electrode.

  In FIG. 1 again, the scanning line driving circuit 104 supplies the scanning signals G1, G2,..., Gm to the scanning line 3a at a predetermined timing as described above (see FIG. 2), and the data line driving circuit 101 is as described above. Image signals S1, S2,..., Sn are supplied to the data line 6a at a predetermined timing (see FIG. 2). The data line driving circuit 101 includes a sampling circuit that samples the image signal VID supplied from the image signal processing circuit 170 onto the image signal line as the image signals S1, S2,..., Sn, and a sampling pulse for the sampling circuit. Including a shift register or the like.

  The image signal processing circuit 170 performs scanning line driving on the scanning line driving circuit 104 based on image data DATA and a synchronization signal Ss input from a video source 180 such as a DVD video player, a video recorder, or a video tuner. The scanning line driving circuit 104 is driven by supplying various signals Sc such as a reference clock signal (Y clock), an inverted clock signal, a start pulse signal (Y start pulse) serving as a reference for scanning, and a power supply signal. To do. Further, various data such as a clock signal (X clock) and an inverted clock signal, a start pulse signal (X start pulse) serving as a reference for scanning, and a power supply signal, which are used as a reference for driving the data line, for the data line driving circuit 101. The data line driving circuit 101 is driven by supplying the signal Sd and the image signal VID.

  Next, the overall configuration of the display unit of the electro-optical device according to the present embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a plan view of the display section of the TFT array substrate viewed from the side of the counter substrate together with each component formed thereon, and FIG. 4 is a cross-sectional view taken along line HH ′ of FIG. It is.

  3 and 4, in the display unit 10c of the electro-optical device according to this embodiment, 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 provided with a sealing material 52 provided in a seal region positioned around the image display region 10a. Are bonded to each other.

  The sealing material 52 is made of, for example, an ultraviolet curable resin, a thermosetting resin, or the like for bonding the two substrates, and is applied on the TFT array substrate 10 in the manufacturing process and then cured by ultraviolet irradiation, heating, or the like. It is. Further, in the sealing material 52, a gap material such as glass fiber or glass beads for dispersing the distance (inter-substrate gap) between the TFT array substrate 10 and the counter substrate 20 to a predetermined value is dispersed. That is, the electro-optical device according to the present embodiment is suitable for a small and enlarged display for a projector light valve.

  A light-shielding frame light-shielding film 53 that defines the frame area of the image display area 10a is provided on the counter substrate 20 side in parallel with the inside of the seal area where the sealing material 52 is disposed. However, part or all of the frame light shielding film 53 may be provided as a built-in light shielding film on the TFT array substrate 10 side. In the peripheral region farther than the frame light shielding film 53, the data line driving circuit 101 and the external circuit connection terminal 102 are along one side of the TFT array substrate 10 in a region located outside the sealing region where the sealing material 52 is disposed. Is provided. The scanning line driving circuit 104 is provided along two sides adjacent to the one side so as to be covered with the frame light shielding film 53. Further, in order to connect the two scanning line driving circuits 104 provided on both sides of the image display area 10a in this way, the TFT array substrate 10 is covered with the frame light shielding film 53 along the remaining side. A plurality of wirings 105 are provided.

  In addition, vertical conduction members 106 that function as vertical conduction terminals between the two substrates are disposed at the four corners of the counter substrate 20. On the other hand, the TFT array substrate 10 is provided with vertical conduction terminals in a region facing these corners. Thus, electrical conduction can be established between the TFT array substrate 10 and the counter substrate 20.

  In FIG. 4, on the TFT array substrate 10, an alignment film is formed on the pixel electrode 9a after the pixel switching TFT, the scanning line, the data line and the like are formed. On the other hand, on the counter substrate 20, in addition to the counter electrode 21, a lattice-shaped or striped light-shielding film 23 and an alignment film are formed on the uppermost layer portion. 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.

  3 and 4, on the TFT array substrate 10, in addition to the data line driving circuit 101, the scanning line driving circuit 104, etc., the image signal on the image signal line is sampled and supplied to the data line. Sampling circuit, precharge circuit for supplying a precharge signal of a predetermined voltage level to a plurality of data lines in advance of the image signal, for inspecting the quality, defects, etc. of the electro-optical device during production or at the time of shipment An inspection circuit or the like may be formed.

  Next, the operation of the electro-optical device according to the present embodiment will be described in detail with reference mainly to FIG. 5 in addition to FIGS. FIG. 5 is a schematic diagram illustrating an example of a frame image and a negative image displayed in the image display area in two consecutive frame periods, together with the polarity of the image signal. Here, an image corresponding to a moving image constituted by a series of frame images P (i) (where i is a natural number) to be displayed at a frame frequency of 60 Hz (that is, a frame period of 1/60 seconds). In the following description, it is assumed that the data DATA is supplied from the video source 180 to the image signal supply circuit 170. In FIG. 5, as a moving image composed of a series of frame images P (i), a moving image in which a moving object image M displayed in black moves in the background B from the left side to the right side is taken as an example.

  As shown in FIG. 1 and FIG. 5, the image signal processing circuit 170 is divided into one subframe period SF1 (i) (where i is a natural number) obtained by dividing the frame period F (i) (where i is a natural number). , The frame image P (i) is displayed in the image display area 10a, and the frame image P (i) in another subframe period SF2 (i) (where i is a natural number) obtained by dividing the frame period F (i). ), A variety of signals Sc and Sd and an image signal VID are supplied to the display unit 10c so that a negative image RP (i) (where i is a natural number) in which the gradation is inverted is displayed in the image display region 10a.

  Specifically, as shown in FIG. 5, in the frame period F (i) which is the i-th (where i is a natural number) frame, first, the first 2/3 frame period (that is, 1/60). The frame image P (i) is displayed in the image display area 10a during the subframe period SF1 (i) corresponding to a period 2/3 times the frame period that is 2 seconds, that is, 1/90 second. During the sub-frame period SF2 (i) corresponding to the subsequent 1/3 frame period (that is, a period that is 1/3 of the frame period that is 1/60 seconds, that is, 1/180 seconds), the frame image P (i ), A negative image RP (i), which is a tone-reversed image, is displayed in the image display area 10a. Here, the negative image RP (i) is displayed as a gradation inverted image in which the gradation value of each pixel portion of the frame image P (i) is inverted. That is, the gradation value of each pixel portion of the negative image RP (i) is the maximum gradation value− (the gradation value of the frame image P (i)). That is, for example, the moving object image M displayed in black in the frame image P (i) is displayed as the moving object Mr displayed in white in the negative image RP (i), and is displayed relatively brightly in the frame image P (i). The background B thus displayed is displayed as a background Br displayed relatively dark in the negative image RP (i).

  That is, when the moving image of the image data DATA input from the video source 180 is composed of a series of frame images P (i) (where i is a natural number), the frame image P (1) is displayed in the image display area 10a. , Negative image RP (1),..., Frame image P (i), negative image RP (i), frame image P (i + 1), negative image RP (i + 1),. Is displayed alternately. In other words, a series of frame images P (i) (where i is a natural number) is displayed while a negative image P (i) is inserted between successive frame images P (i) and P (i + 1).

  Here, if each frame image P (i) is continuously displayed as it is in the image display area 10a, the edge Me of the moving object image M in the moving image displayed in the image display area 10a, that is, a plurality of frames is displayed. The luminance of the pixel unit 10p arranged at the position corresponding to the edge Me in the pixel unit 10p greatly changes between successive frame images, resulting in motion blur. In order to reduce such moving image blur, if a black image is inserted and displayed between successive frame images, the luminance of the pixel portion is sacrificed, and the moving image is composed of a series of frame images. The brightness and contrast of the image are relatively lowered.

  However, in the present embodiment, in particular, as described above, a series of frame images P (i) (provided that a negative image RP (i) is inserted between successive frame images P (i) and P (i + 1). , I is a natural number). Therefore, moving image blur can be reduced without relatively reducing the brightness and contrast of a moving image as compared with the case where a black image is inserted and displayed between successive frame images as described above. That is, even when the display operation is performed in the hold mode, the display in the pseudo impulse mode is realized by the presence of the negative image inserted between the successive frame images P (i) and P (i + 1). This can reduce blurring of moving images. Further, since the negative image RP (i) is brighter than the black image except when the frame image P (i) is a complete white image, the black image is inserted between successive frame images as described above. Compared with the display, it is possible to suppress a decrease in brightness and contrast of the moving image.

  Note that the negative image RP (i) may be an image in which the gradation value is generally increased or decreased after the gradation value of each pixel portion of the frame image P (i) is inverted. That is, the negative image RP (i) may be brightened or darkened as a whole. In either case, moving image blur can be reduced. Furthermore, when the negative image RP (i) is brightened as a whole, a decrease in the brightness of the moving image can be more reliably suppressed. When the negative image RP (i) is darkened as a whole, the moving image blur of the moving image can be more reliably reduced.

  Particularly in the present embodiment, the subframe period SF1 (i) (where i is a natural number) is set longer than the subframe period SF2 (i) (where i is a natural number). More specifically, as described above, the subframe period SF1 (i) is a 2/3 frame period, and the subframe period SF2 (i) is a 1/3 frame period. Therefore, in each frame period F (i), the frame image P (i) is displayed in the image display area 10a for a longer time than the negative image R (i). Accordingly, the moving image blur is generated with little or preferably no disturbance of the moving image such as the negative tone RP (i) being displayed in the image display area 10a so that the gradation of the moving image appears to be reversed. Can be reduced.

  The subframe periods SF1 (i) and SF2 (i) may be set as periods having the same length. That is, each of the subframe periods SF1 (i) and SF2 (i) may be a ½ frame period (that is, a period that is ½ the frame period). Also in this case, moving image blur can be reduced without relatively reducing the brightness and contrast of the moving image, as compared with the case where the black image is inserted and displayed between successive frame images as described above. . However, from the viewpoint of reducing the disturbance of the moving image such that the gradation of the moving image appears to be reversed, the subframe period SF1 (i) is changed to the subframe period SF2 (i) as in the present embodiment. It is preferable to set it longer.

  Furthermore, as shown in FIG. 5, in this embodiment, in particular, the image signal processing circuit 170 converts the image signal VID to a positive polarity on the higher side with respect to the common potential LCCOM for each frame period F (i) (in the drawing). The polarity is inverted between “+”) and low-order negative polarity (indicated by “−” in the figure). That is, inversion driving is performed in which the potential of the image signal VID is alternately inverted every frame period. Therefore, in the image signal VID, in each frame period F (i), the frame signal component corresponding to the frame image P (i) and the negative signal component corresponding to the negative image RP (i) of the image signal VID mutually. The polarity is inverted every frame period F (i) while maintaining the same polarity. Therefore, it is possible to suppress or prevent the occurrence of a bias in polarity for each frame image P (i) or for each negative image RP (i). As a result, the liquid crystal layer 50 to which an electric field generated between the pixel electrode 9a to which the potential of the image signal VID (in other words, the potential of the image signal Si) is supplied and the counter electrode 21 to which the common potential LCCOM is supplied is applied. Seizure and deterioration of (see FIG. 4) can be prevented.

  In addition, since the negative signal component corresponding to the negative image RP (i) can be generated by inverting the gradation value of the frame signal component corresponding to the frame image P (i), as in the present embodiment. With a simple configuration, moving image blur can be reduced while maintaining the brightness and contrast of the moving image.

As described above, according to the electro-optical device according to the present embodiment, even when the display operation is performed in the hold mode, it is possible to reduce the motion blur while maintaining the brightness and contrast of the moving image, and to achieve high quality. Various moving images can be displayed.
<Electronic equipment>
Next, the case where the liquid crystal device which is the above-described electro-optical device is applied to various electronic devices will be described.

  First, a projector using this liquid crystal device as a light valve will be described. FIG. 6 is a plan view showing a configuration example of the projector. As shown in FIG. 6, a projector 1100 includes a lamp unit 1102 made of a white light source such as a halogen lamp. 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 device described with reference to FIG. 6, a mobile personal computer, a mobile phone, a liquid crystal television, a viewfinder type, a monitor direct view type video tape recorder, a car navigation device, a pager, an electronic notebook, Examples include a calculator, a word processor, a workstation, a videophone, a POS terminal, and a device equipped with a touch panel. Needless to say, the present invention can be applied to these various electronic devices.

  In addition to the liquid crystal device described in the above embodiment, the present invention also includes a reflective liquid crystal device (LCOS) in which elements are formed on a silicon substrate, a plasma display (PDP), a field emission display (FED, SED), The present invention can also be applied to an organic EL display, a digital micromirror device (DMD), an electrophoresis apparatus, and the like.

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

1 is a block diagram illustrating an overall configuration of an electro-optical device according to a first embodiment. FIG. 3 is an equivalent circuit diagram of a plurality of pixel units of the electro-optical device according to the first embodiment. 3 is a plan view of a display unit of the electro-optical device according to the first embodiment. FIG. It is the HH 'sectional view taken on the line of FIG. FIG. 6 is a schematic diagram for explaining a frame image and a negative image displayed in a display area of the electro-optical device according to 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.

Explanation of symbols

  3a ... Scanning line, 6a ... Data line, 9a ... Pixel electrode, 10 ... TFT array substrate, 10a ... Image display area, 10p ... Pixel part, 10c ... Display part, 20 ... Counter substrate, 21 ... Counter electrode, 50 ... Liquid crystal Layer, 100P ... electro-optical panel, 101 ... data line driving circuit, 104 ... scanning line driving circuit, F (i) ... frame period, P (i) ... frame image, RP (i) ... negative image, SF1 (i) , SF2 (i) ... subframe period

Claims (3)

A display unit having a plurality of pixel units arranged in the display region;
The frame image is displayed in the display area in one subframe period obtained by dividing a frame period set in advance corresponding to each of a series of frame images constituting a moving image to be displayed in the display area. In addition, in another sub-frame period obtained by dividing the frame period, an image signal is output to the plurality of pixel units so that a gradation-reversed image obtained by inverting the gradation of the frame image is displayed in the display area. Driving means for driving the display unit by supplying
The electro-optical device, wherein the one subframe period is longer than the other subframe period. 2. The electro-optical device according to claim 1 , wherein the driving unit reverses the polarity of the image signal between a positive polarity on a higher side and a negative polarity on a lower side with respect to a predetermined potential for each frame period. apparatus.   An electronic apparatus comprising the electro-optical device according to claim 1.

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