JP6326763B2 - Electro-optical device, electronic apparatus, image processing device, and electro-optical device control method - Google Patents

Description

The present invention relates to an electro-optical device, an electronic apparatus , an image processing device , and an electro-optical device control method .

  In an electro-optical device such as a liquid crystal display device, a vertical split driving method is known in which an electro-optical panel such as a liquid crystal panel is divided into a plurality of regions in the vertical scanning direction, and each region is driven in parallel by line-sequential scanning. .

  For example, when an image that a long image in the vertical direction (vertical scanning direction) moves at a high speed in the horizontal direction (horizontal scanning direction) is displayed with an electro-optical device using a vertical division driving method, Depending on the vertical scanning direction, the image may be tilted or bent at the boundary of the region, or the image may be tilted and appear discontinuous at the boundary of the region.

  For this reason, a technique for driving one divided area with image data delayed by one frame from the other area has been known (for example, Patent Document 1).

JP 2006-343556 A

  However, in the above-described technique, one area is driven with data sent from the other area by one frame, so that the change in the image in one area is delayed by one frame relative to the change in the image in the other area. In particular, in the case of an image with intense motion, the deformation (tilt or the like) of the image is double that when driven without being divided in the vertical direction, and the quality of the image is deteriorated.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to suppress deterioration in the quality of an image when displaying an image with intense movement.

One aspect of the electro-optical device according to the present invention includes a display unit displaying an image by line-sequential scanning, the first image data representing the image of the first frame, a second frame following the first frame And an input video signal including second image data representing an image of the first image data, and between the first frame and the second frame based on the first image data and the second image data. Motion compensation is performed to generate intermediate image data of an intermediate frame, and the intermediate image data is inserted between the first image data and the second image data to generate an output video signal. A processing unit; and a driving unit that drives the display unit by line-sequential scanning according to the output video signal, and the motion compensation processing unit is provided between the first frame and the second frame. Motion vector of attention image A motion vector detection unit for detecting a frame, a timing at which the intermediate image data is inserted, and the motion vector to determine an insertion position on the screen of the target image in the intermediate frame, and the line of the insertion position A correction unit that corrects the insertion position according to a position in the vertical scanning direction of sequential scanning, and the first image data and the first image data so that the attention image is positioned at the insertion position corrected by the correction unit. And a synthesizing unit that generates the intermediate image data based on the second image data, and the correction unit is configured to generate the target image in a third frame corresponding to the first frame according to the motion vector. The insertion position on the screen is determined, and the insertion position is corrected according to the position of the insertion position in the vertical scanning direction of the line-sequential scanning. Based on the first image data and the second image data, third image data indicating the image of the third frame is generated so that the target image is positioned at the insertion position corrected in this way. The motion compensation processing unit generates an output video signal in which the third image data is inserted instead of the first image data .

  According to this aspect, since the insertion position of the image data can be corrected according to the position in the vertical scanning direction, that is, the timing at which the display is actually performed, the quality of the video when displaying a video with intense motion Can be suppressed.

  In one aspect of the electro-optical device described above, the display unit includes first and second regions provided in a vertical scanning direction of the line sequential scanning, and the driving unit performs line sequential processing on the first region. At the same time as scanning, the second area is scanned and driven line-sequentially, and the correction unit corrects the insertion position according to the position in the vertical scanning direction of line-sequential scanning of the first and second areas. Preferably it is done. According to this aspect, the position of the first and second regions in the vertical scanning direction, that is, the display position is corrected according to the timing at which display is actually performed.

  In one aspect of the electro-optical device described above, the correction of the insertion position by the correction unit is preferably performed only in the horizontal scanning direction of the line sequential scanning.

  One aspect of the electronic apparatus according to the invention includes the electro-optic element according to the invention.

One aspect of the image processing apparatus according to the present invention includes first image data indicating an image of a first frame, and second image data indicating an image of a second frame following the first frame. An input video signal is supplied, and based on the first image data and the second image data, motion compensation is performed between the first frame and the second frame, so that an intermediate image of the intermediate frame is obtained. A display unit configured to generate data, insert the intermediate image data between the first image data and the second image data to generate an output video signal, and display the image by line-sequential scanning; An image processing apparatus to be supplied to an electro-optical device, wherein a motion vector detection unit that detects a motion vector of a target image between the first frame and the second frame, and the intermediate image data are inserted The insertion position of the target image on the screen in the intermediate frame is determined according to the imming and the motion vector, and the insertion position is corrected according to the position of the insertion position in the vertical scanning direction of the line-sequential scanning. And a combining unit that generates the intermediate image data based on the first image data and the second image data so that the target image is positioned at the insertion position corrected by the correcting unit. The correction unit determines an insertion position on the screen of the image of interest in a third frame corresponding to the first frame according to the motion vector, and the line sequential of the insertion position The insertion position is corrected in accordance with the position of the scanning in the vertical scanning direction, and the combining unit is configured so that the target image is positioned at the insertion position corrected by the correction unit. Based on the image data and the second image data, the third image data indicating the image of the third frame is generated, and the third image data is inserted instead of the first image data. One aspect of the control method of the electro-optical device according to the present invention, characterized by generating a video signal, is a control method of an electro-optical device including a display unit that displays an image by line sequential scanning. An input video signal including first image data indicating an image of a second frame and second image data indicating an image of a second frame following the first frame is supplied, and the first image data and Based on the second image data, motion compensation between the first frame and the second frame is performed to generate intermediate image data of the intermediate frame, and the intermediate image data is converted into the first image data. image data Inserting between the second image data and generating an output video signal, driving the display unit in a line-sequential manner according to the output video signal, driving the first frame and the second frame A motion vector of the target image between the intermediate frame and the motion vector, and the insertion position of the target image on the screen in the intermediate frame is determined according to the timing at which the intermediate image data is inserted and the motion vector. The first image data and the second image data are corrected so that the insertion position is corrected in accordance with the position of the line sequential scanning in the vertical scanning direction, and the attention image is positioned at the corrected insertion position. The intermediate image data is generated based on the image, and in the correction, the insertion position of the target image on the screen in the third frame corresponding to the first frame is determined according to the motion vector. And determining the insertion position according to the position in the vertical scanning direction of the line-sequential scanning of the insertion position, and the first image so that the target image is positioned at the insertion position corrected by the correction. The third image data indicating the image of the third frame is generated based on the image data and the second image data, and the third image data is inserted instead of the first image data. An output video signal is generated .

1 is a block diagram illustrating a configuration example of an electro-optical device 1 according to a first embodiment. FIG. 3 is a block diagram illustrating a configuration example of a motion compensation processing unit 40 configuring the electro-optical device 1. Explanatory drawing which shows the outline | summary of the production | generation process of the intermediate frame by the motion compensation process part 40 The flowchart which shows an example of the production | generation process of the intermediate frame by the motion compensation process part 40 Explanatory drawing which shows the example of the image data of the flame | frame of the video signal input into the electro-optical apparatus 1 Explanatory drawing showing an example of motion vector detection Explanatory drawing which shows the correction amount by the correction | amendment part 44 according to the position of the electro-optical panel 10 in the vertical scanning direction. Explanatory drawing which shows the example of the image data of an intermediate | middle frame Explanatory drawing showing the correspondence between the input video signal and the output video signal with the intermediate frame inserted Explanatory drawing which shows the example of the image displayed on the electro-optical panel 10 of the electro-optical apparatus 1 The block diagram which shows the structural example of the motion compensation process part 40 of 2nd Embodiment. The flowchart which shows an example of the production | generation process of the intermediate frame by the motion compensation process part 40 Explanatory drawing which shows the example of the image data which performed the motion compensation to the flame | frame in an input video signal Explanatory drawing showing the correspondence between the input video signal and the output video signal with the intermediate frame inserted FIG. 3 is a block diagram illustrating a configuration example of an electro-optical device 1 according to a third embodiment. Explanatory drawing which shows the correction amount by the correction | amendment part 44 according to the position of the electro-optical panel 10 in the vertical scanning direction. Explanatory drawing which shows the example of the image data of the flame | frame of the video signal input into the electro-optical apparatus 1 Explanatory drawing showing the correspondence between the input video signal and the output video signal with the intermediate frame inserted Explanatory drawing which shows the example of the image displayed on the electro-optical panel 10 of the electro-optical apparatus 1 Explanatory drawing which shows the correction amount by the correction | amendment part 44 according to the position of the vertical scanning direction of the electro-optical panel 10 of 4th Embodiment. Explanatory drawing which shows the example of the image data of the flame | frame of the video signal input into the electro-optical apparatus 1 Explanatory drawing which shows the example of the image displayed on the electro-optical panel 10 of the electro-optical apparatus 1 A block diagram showing an example of composition of an image processing device of a 5th embodiment Explanatory drawing which shows the correspondence of the input video signal in the modification, and the output video signal which inserted the intermediate frame A perspective view showing a configuration of a personal computer to which an electro-optical device is applied The perspective view which shows the structure of the information portable terminal to which the electro-optical device is applied Schematic diagram showing the configuration of a projection display device to which an electro-optical device is applied It is a schematic diagram which shows the example which comprised the electro-optical apparatus using the projection type display apparatus.

  Hereinafter, preferred embodiments of the electro-optical device of the invention will be described in detail. Note that this embodiment is given as an example, and the contents of the present invention should not be construed in a limited manner. Hereinafter, in each embodiment, a case where a liquid crystal element is used as an example of an electro-optical element constituting a pixel will be described.

<1. First Embodiment>
[A. Configuration of electro-optical device]
FIG. 1 is a block diagram illustrating a configuration of an electro-optical device 1 according to the present embodiment. The electro-optical device 1 is supplied with a video signal from a computer, a video reproduction device, or the like (not shown). The electro-optical device 1 drives the electro-optical panel (display unit) 10 according to the supplied video signal to display an image.

  The electro-optical device 1 includes an electro-optical panel 10 in which pixels are arranged in a matrix at intersections of scanning lines and data lines, a scanning line driving circuit 20 that selects driving scanning lines, and a first region of the electro-optical panel 10. The operation of the data line driving circuit 21 for driving the data lines in the data line 11, the data line driving circuit 22 for driving the data lines in the second region 12 of the electro-optical panel 10, and the operation of the scanning line driving circuit 20 to the data line driving circuit 22 And a motion compensation processor 40 for inserting an intermediate frame subjected to motion compensation between frames of the input video signal.

  The electro-optic panel 10 is provided with K (K is an even number of 2 or more) scanning lines extending in the x direction (horizontal scanning direction). The first region 11 of the electro-optical panel 10 is a region corresponding to the 1st to K / 2th scanning lines, and the second region 12 is a region corresponding to the K / 2 + 1 to the Kth scanning lines. It is. In these regions 11 and 12, L (L is a natural number) data lines extending in the y direction (vertical scanning direction) in the regions 11 and 12, respectively, are formed. The pixels in the electro-optical panel 10 are arranged in a matrix of K rows × L columns corresponding to the intersections of the scanning lines and the data lines. For example, a liquid crystal element is used for this pixel.

  The control unit 30 includes a timing signal generation unit 31 that generates a timing signal for controlling operations of the scanning line driving circuit 20, the data line driving circuit 21, and the data line driving circuit 22, a timing signal from the timing signal generation unit 31, and motion compensation. A display data processing unit 32 that controls the operation of the data line driving circuit 21 and the data line driving circuit 22 according to the image data of the frame in the output video signal from the processing unit 40 is provided. The display data processing unit 32 includes a frame buffer (not shown), for example, and holds image data of a frame in the output video signal from the motion compensation processing unit 40.

  FIG. 2 is a block diagram illustrating a detailed configuration of the motion compensation processing unit 40. The motion compensation processing unit 40 includes a frame buffer 41 that holds image data (second image data) of a frame (second frame) in an input video signal (input video signal), a previous frame ( A frame buffer 42 that holds image data (first image data) of the first frame, and a motion for detecting a motion vector of a target image between the frame buffer 41 and the image data of the frame stored in the frame buffer 42 The vector detection unit 43 obtains the insertion position on the screen of the target image in the intermediate frame according to the timing and motion vector for inserting the image data of the intermediate frame, and sets the obtained insertion position to the position in the vertical scanning direction of the line sequential scanning. Accordingly, a correction unit 44 that corrects the insertion position is provided. In addition, the motion compensation processing unit 40 generates an intermediate frame image data according to the corrected insertion position and the frame image data stored in the frame buffer 41 or the frame buffer 42, and an output video signal. A frame buffer 46 that holds the image data of the frame, and a switching unit 47 that switches the image data supplied to the frame buffer 46 between the frame buffer 41 and the synthesis unit 45.

[B. Outline of operation]
The motion compensation processing unit 40 of the electro-optical device 1 configured as described above is supplied with a video signal (input video signal: for example, a frame frequency of 60 Hz) from an external device such as a computer or a video playback device. The motion compensation processing unit 40 generates image data of an intermediate frame based on image data of an adjacent frame of the supplied input video signal, and inserts it between frames of the input video signal. The motion compensation processing unit 40 supplies the video signal (output video signal: for example, the frame frequency is 240 Hz) with the intermediate frame inserted to the control unit 30 via the frame buffer 46. This intermediate frame is inserted every frame period Δt of the output video signal. This frame period Δt is Δt = ti / n, ti is the frame period of the input video signal, and n is a natural number of 2 or more in the ratio of the frame frequency of the output video signal to the frame frequency of the input video signal. For example, if the frame frequency of the input video signal is 60 Hz and the frame frequency of the output video signal is 240 Hz, n is 4 and Δt is 4.16 ms. In this case, the motion compensation processing unit 40 inserts the intermediate frame after Δt, 2Δt, and 3Δt of the frame in the input video signal.

  When the output video signal is supplied from the motion compensation processing unit 40, the control unit 30 stores image data for one frame in the frame buffer, and scan line driving circuit 20, data line driving circuit 21, data line driving. The operation of the circuit 22 is controlled to display an image corresponding to the image data on the electro-optical panel 10.

  Specifically, the timing signal generation unit 31 of the control unit 30 performs K / 2 during the frame period (Δt: 4.16 ms when the frame frequency is 240 Hz) of the output video signal of the motion compensation processing unit 40. A timing signal for sequentially selecting the scanning lines is generated and supplied to the scanning line driving circuit 20 and the display data processing unit 32. The display data processing unit 32 acquires the image data corresponding to the scanning line selected by the scanning line driving circuit 20 from the built-in frame buffer according to the supplied timing signal, and the data line driving circuit 21 and the data line driving circuit 22. To supply.

  When the timing signal from the timing signal generator 31 is supplied, the scanning line driving circuit 20 sequentially selects the first to K / 2th K / 2 scanning lines in the first region 11. At the same time, the data line driving circuit 21 drives the data lines according to the image data supplied from the display data processing unit 32. In parallel with this, the scanning line driving circuit 20 sequentially selects K / 2 + 1 to K / 2 scanning lines in the second region 12. At the same time, the data line driving circuit 22 drives the data lines in accordance with the image data supplied from the display data processing unit 32. By such an operation, the pixels in the first region 11 are driven by being sequentially scanned at every frame period (Δt) of the output video signal, and the pixels in the second region 12 are also driven in parallel with this. It is sequentially scanned and driven. As a result, the image displayed on the electro-optical panel 10 is updated and reproduced as a video every frame period (Δt) of the output video signal.

[C. Details of Operation of Motion Compensation Processing Unit 40]
When generating the above-described intermediate frame image data, the motion compensation processing unit 40 detects a motion vector (vector from A to B) between adjacent frames, for example, as schematically shown in FIG. Thus, motion compensation is performed to obtain an insertion position C of image data, and an insertion position D corrected according to the position of the insertion position in the vertical scanning direction is obtained.

FIG. 4 is a flowchart showing details of such processing.
When image data (second image data) of a new frame (current frame: N [second frame]) in the input video signal is supplied, the motion compensation processing unit 40 starts processing from step S1. The image data (first image data) of the previous frame (previous frame: N-1 [first frame]) is moved from the frame buffer 41 to the frame buffer 42 (S1), and the current frame (N) Image data is stored in the frame buffer 41 (S2).

  Next, the motion vector detection unit 43 of the motion compensation processing unit 40 calculates the motion from the image data of the previous frame (N−1) and the image data (target image) of the current frame (N) stored in the frame buffer 42. The vector mv is detected (S3). This motion vector mv is, for example, for each block of predetermined pixels (i × j: i and j are natural numbers) between the image data of the block of the previous frame (N−1) and the image data of the current frame (N). Matching is performed for each block. For example, consider a situation in which a rectangular image 51 in the vertical direction moves in the horizontal direction between two adjacent frames (N−1, N) shown in FIG. 5 (A) and FIG. 5 (B). In such a situation, the motion vector mv of the block of image data in the image 51 is, for example, as shown in FIG. 6, the position 51b of the image 51 in the current frame (N) and the previous frame (N−1). This is the difference (distance) from the position 51b of the image 51.

  Furthermore, the motion compensation processing unit 40 generates an intermediate frame image (interpolated image) for each frame period Δt of the output video signal in accordance with the obtained motion vector mv, and outputs it through the frame buffer 46 (S4 to S4). S8). Thereafter, the data of the current frame (N) stored in the frame buffer 41 is output via the frame buffer 46. As a result, the output video signal with the intermediate frame inserted is supplied to the control unit 30.

More specifically, the generation of the intermediate frame image data in step S6 described above is executed by the processes shown in steps S21 to S25 in FIG.
The correction unit 44 of the motion compensation processing unit 40 obtains the insertion position of the image data of the block for each block for which the motion vector mv is obtained as described above, and the insertion position according to the position of the insertion position in the vertical scanning direction. Is corrected to generate intermediate frame image data (S21 to S24).

  In this processing, first, the correction unit 44 selects a predetermined block (target image), and the difference Δmv (= mv / n: n is the difference between the frame frequency of the output video signal and the frame frequency of the input video signal. Ratio) and the timing t (Δt × m) at which the intermediate frame is inserted, the movement amount Δr (= Δmv × m) of the block is obtained (S21).

  Next, the correction unit 44 obtains an insertion position (reference numeral 53 in FIGS. 8A to 8C) according to the position of the block and the movement amount (S22), and performs vertical scanning of the obtained insertion position. The insertion position is corrected according to the direction position (S23). The number K of scanning lines of the electro-optic panel 10 is 1080, n is 4, the position in the vertical scanning direction corresponding to the first scanning line is 0, and the position in the vertical scanning direction corresponding to the 1080th scanning line is Assuming that 1079, the insertion position correction amount Δd is, for example, as shown in FIG. This correction amount Δd corresponds to the distance that the image at the insertion position should move within the time from the start of vertical scanning to the driving of the scanning line at the insertion position.

  When the correction unit 44 corrects the insertion position for all the blocks and supplies the corrected insertion position (corrected code 54 in FIGS. 8A to 8C) to the synthesis unit 45 (S24). The combining unit 45 inserts the image data (N−1) in the frame buffer 42 into the image data of the intermediate frame according to the corrected insertion position of each block. In the case of an image with motion (when the motion vector of at least one block is not 0), when an intermediate image is generated using only the image data (N-1) in the frame buffer 42 in this way, Some may be missing. In such a case, the synthesizing unit 45 acquires the image data corresponding to the missing image from the frame buffer 41. When the insertion of the image data of all the blocks is completed, the synthesizing unit 45 supplies the generated intermediate frame image data to the frame buffer 46, ends the generation of the intermediate frame image data for one frame, and FIG. The process returns to step S7 and subsequent steps.

  When the above-described steps S5 to S7 are repeated while increasing the value of the variable m from 1 to 3, the frame buffer 46 stores the intermediate frame image data M1 shown in FIGS. 8A to 8C, for example. , M2, M3 are sequentially supplied. Thereafter, the synthesizing unit 45 switches the switching unit 47 to supply the image data of the current frame (N) held in the frame buffer 41 to the frame buffer 46 (S9), and the next frame image as the input video signal. Wait for data to be provided (S10). When the data of the next frame is supplied, the processes after step S1 are repeated.

  By such processing, for example, as shown in FIG. 9, image data (first image data, second frame) of adjacent frames (N−1, N: first frame, second frame) of the input video signal. An output video signal in which image data (intermediate image data) of intermediate frames (M1, M2, M3) is inserted between the image data) is supplied to the control unit 30.

  The case where the motion vector has only the component in the x direction (horizontal scanning direction) has been shown and described above. However, in the case where the motion vector also has the component in the y direction (vertical scanning direction), in step S21 in FIG. The obtained movement amount Δr has a component in the y direction, and the same processing as described above is performed only by moving the insertion position obtained in step S22 in the y direction.

[C. effect]
In the present embodiment, as described above, the first region 11 and the second region are scanned in parallel in the first region 11 and the second region 12 of the electro-optical panel 10. 12, a timing lag corresponding to the frame period of the output video signal (Δt: 4.16 ms when the frame frequency is 240 Hz) is generated at the timing at which the uppermost scanning line and the lowermost scanning line are driven. ing. That is, there is a time lag of the frame period Δt of the output video signal between the timing when the lowermost scanning line in the first region 11 is driven and the timing when the uppermost scanning line in the second region is driven. Yes.

  In such a situation, as shown in FIGS. 5A and 5B described above, the image 51 that is long in the direction corresponding to the vertical direction of the screen of the electro-optical panel 10 moves in the horizontal direction of the screen. A case where video is displayed will be described.

  When such an image is displayed by an output image signal in which an intermediate frame generated without correcting the insertion position is displayed, an image actually displayed on the electro-optical panel 10 is shown in FIG. As shown by a broken line, the image 55 is displayed as a continuous image 55 in the vertical direction. However, when viewed through the eyes of the human, the first region 11 and the second region 12 are inclined in the horizontal direction (horizontal scanning direction) as shown by the solid line in FIG. Will be recognized as a discontinuous image 56 at the boundary.

  On the other hand, when a video signal in which the insertion position is corrected according to the motion vector and the vertical position (corresponding to the display timing) in each of the areas 11 and 12 is displayed as in the present embodiment, As shown by a broken line in FIG. 10B, the image displayed on is inclined in the horizontal direction (horizontal scanning direction) and becomes a discontinuous image 57 at the boundary between the first region 11 and the second region 12. Become. However, when viewed through the human eyes, due to the time lag of the display timing, as shown by the solid line in the figure, an image 58 continuous at the boundary between the first region 11 and the second region 12 as a straight line in the vertical direction. Recognized as Therefore, according to this embodiment, even when a video with a large amount of motion is displayed, it is possible to prevent the image from appearing discontinuous or tilted, and to suppress deterioration in the quality of the video. can do.

  Note that the above-described correction of the insertion position may be performed only in the above-described x direction (horizontal scanning direction). Since human visual characteristics are particularly sensitive to lateral movement, an increase in processing load can be suppressed by correcting the insertion position only in the x direction.

<2. Second Embodiment>
In the first embodiment described above, as shown in FIG. 9 described above, the image data of the frame (N−1, N) of the input video signal is output as it is as the image data of the frame of the output video signal. . For this reason, it is considered that there is a slight deterioration in quality between the inserted intermediate frame and the frame of the input video signal. For this reason, in the present embodiment, the correction corresponding to the motion vector mv is also performed on the image data of the frame in the input video signal.

The electro-optical device 1 of the present embodiment is configured in the same manner as in FIG. 1 described above, but the configuration of the motion compensation processing unit 40 is partially different.
FIG. 11 shows a configuration example of the motion compensation processing unit 40 configuring the electro-optical device 1 of the present embodiment. In the motion compensation processing unit 40 of the first embodiment shown in FIG. 2 described above, the combining unit 45 switches the image data of the frame supplied to the frame buffer 46 by the switching unit 47. The motion compensation processing unit 40 supplies the frame buffer 46 with image data of a frame that has undergone motion compensation and correction using the motion vector mv.

  FIG. 12 is a flowchart illustrating the motion compensation processing by the motion compensation processing unit 40 of the electro-optical device 1 according to the present embodiment. The difference from the process shown in FIG. 4 is that the initial value of m in step S4 is set to 0 as shown in step S34, and the current frame (N) held in the frame buffer 41 is output in step S9. There is no point.

  By setting the initial value of m to 0, even in a frame corresponding to the previous frame (N−1, first frame) in which m is 0, that is, Δt and movement amount Δr are both 0, steps S21 to S25 are performed. Processing is executed. As a result, as shown in FIG. 13A, the frame M0 (third) in which the insertion position of the image data of the block in the previous frame (N-1) is corrected according to the position of the insertion position in the vertical scanning direction. Image data (third image data) is generated and supplied to the frame buffer 46 in place of the image data (first image data) of the previous frame (N-1, first frame). .

  As a result of such processing, for example, as shown in FIG. 14, the image data of the frame in which the insertion position of the image data is corrected is output together with the image data of the intermediate frame described above for the frame in the input video signal. The signal is supplied to the control unit 30 as a signal.

  This makes it possible to correct the frame corresponding to the frame in the input video signal in accordance with the position of the image data insertion position in the vertical scanning direction. Degradation can be further suppressed.

<3. Third Embodiment>
FIG. 15 shows a configuration example of the electro-optical device 1 of the present embodiment.
In the present embodiment, the electro-optical panel 10 is not divided into the first region 11 and the second region 12, and L data lines (L is a natural number) extending in the y direction (vertical scanning direction) are formed. ing. In the electro-optical device 1, data lines are driven by one data line driving circuit 25.

  In the electro-optical device 1, the scanning line driving circuit 20 sequentially selects the first to Kth scanning lines according to the timing signal from the timing signal generator 31. As a result, the image displayed on the electro-optical panel 10 is updated and reproduced as a video every frame period (Δt) of the output video signal.

  Further, in the electro-optical device 1, the motion compensation processing unit 40 is configured in the same manner as in FIG. 2 described above and operates in the same manner as in FIG. 4 described above. However, in the correction of the insertion position in step S24 in FIG. The correction amount Δd to be used is as shown in FIG. 16, for example.

  In the electro-optical device 1 configured in this way, for example, as shown in FIGS. 17A and 17B, a rectangular shape in the vertical direction is formed between two adjacent frames (N−1, N). Consider a situation in which an input video signal in which the image 51 moves in the horizontal direction is supplied.

  In the electro-optical device 1, the motion compensation processing unit 40 inserts image data at the insertion position 54 corrected according to the position of the insertion position 53 in the vertical scanning direction, and generates intermediate frames M1, M2, and M3. . The image data of these intermediate frames (M1, M2, M3) is inserted between the image data of adjacent frames (N-1, N) of the input video signal and controlled as an output video signal, for example, as shown in FIG. Supplied to the unit 30.

  In the present embodiment, as described above, line-sequential scanning is performed on the entire surface of the electro-optical panel 10, and therefore, the timing at which the uppermost scanning line and the lowermost scanning line of the electro-optical panel 10 are driven is There is a time lag corresponding to the frame period of the output video signal (Δt: 4.16 ms when the frame frequency is 240 Hz).

  In such a situation, when the video shown in FIGS. 17A and 17B is displayed by the output video signal in which the intermediate frame generated without correcting the insertion position is displayed, An image actually displayed on the optical panel 10 is displayed as an image 55 having no inclination, as indicated by a broken line in FIG. However, when viewed through the eyes of a human, the image 56 is recognized as an image 56 tilted in the horizontal direction (horizontal scanning direction) due to the time lag of the display timing described above, as indicated by the solid line in FIG.

  On the other hand, as in the present embodiment, when the display is performed with the output video signal in which the insertion position is corrected in accordance with the motion vector and the vertical position of the insertion area (corresponding to the display timing), it is actually displayed. An image 57 becomes an image 57 inclined in the horizontal direction (horizontal scanning direction) as indicated by a broken line in FIG. However, when viewed through the eyes of a human, the image is recognized as an image 58 having no inclination, as indicated by a solid line in FIG. Therefore, according to this embodiment, even when an image with a large amount of motion is displayed, it is possible to prevent the image from being tilted and to suppress a reduction in the quality of the image.

<4. Fourth Embodiment>
In the first embodiment described above, the vertical scanning direction of the first region 11 and the vertical scanning direction of the second region 12 are the same, but in this embodiment, these directions are reversed. Yes.

  The electro-optical device 1 of the present embodiment is configured in the same manner as in FIG. Further, in the electro-optical device 1, the motion compensation processing unit 40 is configured in the same manner as in FIG. 2 described above and operates in the same manner as in FIG. 4 described above. However, in the correction of the insertion position in step S24 in FIG. The correction amount Δd to be used is as shown in FIG. 20, for example.

  In the present embodiment, as described above, line-sequential scanning is performed in parallel in the first region 11 and the second region 12 of the electro-optical panel 10, and the vertical scanning direction of the first region 11 The direction of the vertical scanning of the second region 12 is opposite. Therefore, a time lag corresponding to the frame period Δt of the output video signal is generated at the timing when the lowermost scanning line and the uppermost scanning line of the first region 11 are driven. In addition, a time lag corresponding to the frame period Δt of the output video signal is generated at the timing when the uppermost scanning line and the lowermost scanning line of the second region 11 are driven.

  In such a situation, the electro-optical device 1 has a rectangular shape in the vertical direction between two adjacent frames (N−1, N), for example, as shown in FIGS. 21 (A) and (B). Consider a situation in which an input video signal in which the image 51 moves in the horizontal direction is supplied.

  When displayed by the output video signal in which the intermediate frame generated without correcting the insertion position is displayed, an image actually displayed on the electro-optical panel 10 is as shown by a broken line in FIG. The image 55 is displayed as an unbent image 55. However, when viewed through the eyes of a human, the image 56 is recognized as a folded image 56 at the boundary between the first region 11 and the second region 12 as shown by the solid line in the figure due to the time lag of the display timing described above. Will be.

  On the other hand, as in the present embodiment, when the display is performed with the output video signal in which the insertion position is corrected in accordance with the motion vector and the vertical position of the insertion area (corresponding to the display timing), it is actually displayed. As shown by a broken line in FIG. 22B, the image to be turned becomes an image 57 bent at the boundary between the first region 11 and the second region 12. However, when viewed through the eyes of a human, the image 58 is recognized as an unfolded image 58 as indicated by the solid line in FIG. Therefore, according to this embodiment, even when a video with a large amount of motion is displayed, it can be prevented from being bent, and a reduction in the quality of the video can be suppressed.

<5. Fifth Embodiment>
FIG. 23 shows a configuration example when the image processing apparatus has the same function as the motion compensation processing unit 40 of the electro-optical device 1 shown in FIG. Similar to FIG. 11 described above, the image processing apparatus 60 has a frame buffer 41 that holds image data of a frame in an input video signal (input video signal), and holds image data of a previous frame. A frame buffer 42 to be placed, a motion vector detection unit 43 for detecting a motion vector between image data of frames (adjacent frames) stored in the frame buffer 41 and the frame buffer 42, and a timing and a motion vector for inserting image data of an intermediate frame Accordingly, a position (insertion position) for inserting the image data of the frame in the input video signal into the image data of the intermediate frame is obtained, and the insertion is performed according to the position in the vertical scanning direction of the line sequential scanning of the obtained insertion position. A correction unit 44 for correcting the position is provided. In addition, the motion compensation processing unit 40 generates an intermediate frame image data according to the corrected insertion position and the frame image data stored in the frame buffer 41 or the frame buffer 42, and an output video signal. A frame buffer 46 is provided for holding image data of frames.

  The image processing apparatus 60 configured as described above performs the same processing as that of the motion compensation processing unit 40 shown in FIG. 12 described above, and performs motion compensation between adjacent frames (N−1, N) of the input video signal. And an output video signal in which the insertion position of the image data is corrected. Such an output video signal is supplied to, for example, the electro-optical device 1 that is divided and driven by performing line-sequential scanning in parallel in the first region 11 and the second region 12 of the electro-optical panel 10 to display the video. By displaying the image, it is possible to suppress a decrease in the quality of the video.

<6. Modification>
The present invention is not limited to the above-described embodiments, and for example, various modifications described below are possible. In addition, each modification may be appropriately combined with each other, and may be appropriately combined with each of the above-described embodiments.

(1) The number of intermediate frames to be inserted between adjacent frames (first frame and second frame) in the input video signal is not limited to the three frames in the above-described embodiments (when n = 4), For example, as shown in FIG. 24, the number may be one (when n = 2). In this case, the frame frequency of the output video signal is 120 Hz (120 frames / second). In this case, as shown in the figure, the quality of the video can be further improved by performing the motion compensation and correction processing on the frame in the input video signal.

(2) Alternatively, motion compensation and correction processing is performed on the frame in the input video signal without inserting an intermediate frame, and the same image data as in FIGS. 13A and 13B is output. The electro-optical panel 10 may be driven as a video signal. Thereby, the quality of the video can be improved without increasing the frame frequency.

(3) The configuration of the image processing device 60 may be the same as the configuration of the other embodiments.

(4) A configuration similar to that of the motion compensation processing unit 40 or the image processing device 60 described above may be provided on the computer or video equipment side that supplies the video signal to the liquid crystal display device. In these devices, when decoding a compression-encoded video signal, a motion vector for each predetermined region (macroblock) in the image data may be used. In such a case, the motion vector used at the time of decoding and the position of the macroblock in the vertical scanning direction are held and used as the motion vector to be detected by the motion vector detection unit 43 and the insertion position. You can also. As a result, it is possible to reduce the overall processing load while suppressing the deterioration of the quality of the video.

<7. Application example>
Next, an electronic apparatus to which the electro-optical device 1000 including the electro-optical device 1 according to the embodiment and the modification described above is applied will be described. FIG. 25 shows a configuration of a mobile personal computer to which the electro-optical device 1000 is applied. The personal computer 2000 includes an electro-optical device 1000 as a display unit and a main body 2010. The main body 2010 is provided with a power switch 2001 and a keyboard 2002.

  FIG. 26 shows a configuration of a portable information terminal (PDA: Personal Digital Assistants) to which the electro-optical device 1000 is applied. The information portable terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and the electro-optical device 1000 as a display unit. When the power switch 4002 is operated, various types of information such as an address book and a schedule book are displayed on the electro-optical device 1000.

  FIG. 27 is a schematic diagram of a projection display device (three-plate projector) 5000 to which the electro-optical device 1000 is applied. The projection type display device 5000 includes three electro-optical devices 1000 (1000R, 1000G, and 1000B) corresponding to different display colors (red, green, and blue). The illumination optical system 5001 supplies the red component r of the emitted light from the illumination device (light source) 5002 to the electro-optical device 1000R, the green component g to the electro-optical device 1000G, and the blue component b to the electro-optical device 1000B. To supply. Each electro-optical device 1000 functions as a light modulator (light valve) that modulates each monochromatic light supplied from the illumination optical system 5001 according to a display image. The projection optical system 5003 synthesizes the emitted light from each electro-optical device 1000 and projects it onto the projection surface 5004.

  FIG. 28 is a schematic diagram of a display system 6000 to which the image processing apparatus 60 is applied. In this display system 6000, two projection display devices 6001 and 6002 are used, and each projection display device 6001 and 6002 projects an image on an upper half area 6011 and a lower half area 6012 of the screen 6010. It has become. The display system 6000 includes a switching unit 70 that supplies the upper half of the image data of each frame of the output video signal from the image processing device 60 to the projection display device 6001 and supplies the lower half to the projection display device 6002. ing.

  In the display system 6000 configured in this manner, as in the above-described embodiment, when the image processing apparatus 60 performs motion compensation, the image data is stored in accordance with the position of the image data insertion position in the vertical scanning direction. The insertion position may be corrected.

  Alternatively, the switching unit 70 supplies the upper half of the image data of each frame of the input video signal to the projection display device 6001 and supplies the lower half to the projection display device 6002, and in each of the projection display devices 6001 and 6002. When performing motion compensation, the image data insertion position may be corrected in accordance with the position of the image data insertion position in the vertical scanning direction.

  Electronic devices to which the electro-optical device 1000 is applied include those shown in FIGS. 25 to 28, digital still cameras, liquid crystal televisions, viewfinder type, monitor direct-view type video tape recorders, car navigation devices, pagers, and electronic devices. Examples include notebooks, calculators, word processors, workstations, videophones, POS terminals, and devices equipped with touch panels. The electro-optical device described above can be applied as a display unit of these various electronic devices.

DESCRIPTION OF SYMBOLS 1 ... Electro-optical device 10 ... Electro-optical panel, 11 ... 1st area | region, 12 ... 2nd area | region, 20 ... Scanning line drive circuit, 21, 22 ... Data line drive circuit, 30 ... Control part, 40 ... Motion compensation Processing unit, 43... Motion vector detection unit, 44... Correction unit, 45.

Claims (6)

A display unit for displaying an image by line-sequential scanning;
An input video signal including first image data indicating an image of a first frame and second image data indicating an image of a second frame following the first frame is supplied, and the first image is supplied. Based on the data and the second image data, motion compensation between the first frame and the second frame is performed to generate intermediate image data of the intermediate frame, and the intermediate image data is converted into the first image data. A motion compensation processing unit for generating an output video signal inserted between the first image data and the second image data;
A drive unit that scans and drives the display unit in accordance with the output video signal.
The motion compensation processing unit
A motion vector detection unit that detects a motion vector of a target image between the first frame and the second frame;
According to the timing at which the intermediate image data is inserted and the motion vector, the insertion position of the target image in the intermediate frame is determined on the screen, and the insertion position is determined in accordance with the position of the line sequential scanning in the vertical scanning direction. A correction unit for correcting the insertion position;
A synthesis unit that generates the intermediate image data based on the first image data and the second image data so that the target image is located at the insertion position corrected by the correction unit;
Equipped with a,
The correction unit is
According to the motion vector, an insertion position on the screen of the image of interest in a third frame corresponding to the first frame is determined, and according to a position in the vertical scanning direction of the line sequential scanning of the insertion position. , Correct the insertion position,
The synthesis unit is
Third image data indicating the image of the third frame based on the first image data and the second image data so that the target image is positioned at the insertion position corrected by the correction unit. Produces
The motion compensation processing unit
An electro-optical device that generates an output video signal in which the third image data is inserted instead of the first image data . The display unit includes first and second regions provided in a vertical scanning direction of the line sequential scanning.
The driving unit drives the second region by line-sequential scanning simultaneously with scanning the first region,
The electro-optical device according to claim 1, wherein the correction unit corrects the insertion position in accordance with a position in a vertical scanning direction of line sequential scanning of the first and second regions.   2. The electro-optical device according to claim 1, wherein the correction of the insertion position by the correction unit is performed only in a horizontal scanning direction of the line sequential scanning. Electronic apparatus, characterized in that, with an electro-optical device according to any one of claims 1 to 3. An input video signal including first image data indicating an image of a first frame and second image data indicating an image of a second frame following the first frame is supplied, and the first image is supplied. Based on the data and the second image data, motion compensation between the first frame and the second frame is performed to generate intermediate image data of the intermediate frame, and the intermediate image data is converted into the first image data. An image processing apparatus that is inserted between one image data and the second image data, generates an output video signal, and supplies the output video signal to an electro-optical device having a display unit that displays an image by line sequential scanning. ,
A motion vector detection unit that detects a motion vector of an image of interest between the first frame and the second frame;
According to the timing at which the intermediate image data is inserted and the motion vector, the insertion position of the target image in the intermediate frame is determined on the screen, and the insertion position is determined in accordance with the position of the line sequential scanning in the vertical scanning direction. A correction unit for correcting the insertion position;
A synthesis unit that generates the intermediate image data based on the first image data and the second image data so that the target image is located at the insertion position corrected by the correction unit;
Equipped with a,
The correction unit determines an insertion position on the screen of the target image in a third frame corresponding to the first frame according to the motion vector, and a vertical scanning direction of the line sequential scanning of the insertion position The insertion position is corrected according to the position of
The synthesizing unit indicates the image of the third frame based on the first image data and the second image data so that the target image is positioned at the insertion position corrected by the correction unit. Generating third image data;
An image processing apparatus that generates an output video signal in which the third image data is inserted instead of the first image data . A method for controlling an electro-optical device including a display unit that displays an image by line-sequential scanning,
An input video signal including first image data indicating an image of a first frame and second image data indicating an image of a second frame following the first frame;
Based on the first image data and the second image data, performing motion compensation between the first frame and the second frame to generate intermediate image data of the intermediate frame;
Inserting the intermediate image data between the first image data and the second image data to generate an output video signal;
The display unit is driven by line-sequential scanning according to the output video signal,
Detecting a motion vector of a target image between the first frame and the second frame;
According to the timing at which the intermediate image data is inserted and the motion vector, the insertion position of the target image in the intermediate frame is determined on the screen, and the insertion position is determined in accordance with the position of the line sequential scanning in the vertical scanning direction. Correct the insertion position,
Based on the first image data and the second image data, the intermediate image data is generated so that the target image is positioned at the corrected insertion position ,
In the correction, an insertion position on the screen of the image of interest in a third frame corresponding to the first frame is determined according to the motion vector, and the vertical position of the line sequential scanning of the insertion position is determined in the vertical scanning direction. Depending on the position, correct the insertion position,
Based on the first image data and the second image data, third image data indicating the image of the third frame is set so that the target image is positioned at the insertion position corrected by the correction. Generate
An electro-optical device control method, comprising: generating an output video signal in which the third image data is inserted instead of the first image data .

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