JP5193240B2 - Liquid crystal display - Google Patents

Description

  The present invention comprises a plurality of light emitting elements provided corresponding to each of the divided areas obtained by dividing the display area of the liquid crystal display panel for each of a plurality of pixels, and individually controls the light emission luminance of each of the light emitting elements. The present invention relates to a liquid crystal display device capable of the above.

A liquid crystal display device such as a liquid crystal television receiver includes a liquid crystal display panel having a number of liquid crystal elements and a backlight that illuminates the liquid crystal display panel from behind. In the liquid crystal display device, the drive of each liquid crystal element of the liquid crystal display panel is controlled based on the input video signal, and the transmittance of each liquid crystal element is changed. As a result, the amount of light transmitted from the backlight is adjusted, and an image based on the image signal is displayed on the liquid crystal display panel.
In the liquid crystal display device, the amount of light emitted from the backlight is adjusted based on the image data. In particular, when the backlight includes a plurality of LEDs provided corresponding to each of the divided areas obtained by dividing the display area of the liquid crystal display panel for each of the plurality of pixels, the divided areas are based on input image data. The power supplied to each LED corresponding to each is individually controlled, and the light emission luminance of each LED is adjusted.

By the way, it is generally known that motion blur and edge blurring occur when a liquid crystal display device operates by a so-called hold drive that always holds a display even when an image signal changes.
Therefore, for example, as disclosed in Patent Document 1, motion blur and edge blurring may be prevented by blinking the backlight and operating it in a pseudo impulse drive. For example, as disclosed in Patent Document 2, in order to obtain sufficient light emission luminance, it is also conceivable that the light is lit brightly and darkly so that the light emission of the backlight is continued at a low luminance even during the backlight off period.
In particular, in a so-called double speed driving liquid crystal display device that is driven at a double speed (eg, 120 Hz) with respect to a video signal frequency (eg, 60 Hz), it is generated between two successive original image frames based on the motion vector of the original image frame. However, if the motion vector between the original image frames is too large (when the motion of the image is too fast), the generation accuracy of the interpolated image frame decreases, and motion blur and It causes edge blur. For this reason, in a liquid crystal display device driven at double speed, it is desirable to improve motion blur and edge blur by blinking the backlight or lighting it bright and dark as described above.

JP 2007-256678 A JP 2004-252127 A

However, when the backlight is blinked or lit brightly and darkly, there is a problem that flickering occurs in the display image because the light emission luminance differs between the on period and the off period.
Here, Patent Document 1 also discloses a technique for preventing the occurrence of flicker by causing the backlight to emit light with the same peak luminance in both the on period and the off period. In this case, the light emission luminance in the on period and the off period is adjusted by changing the average on time ratio in the on period and the off period. As described above, if the peak luminance in the on period and the off period is made the same, it is possible to suppress the occurrence of flicker, but if the entire image is viewed, a difference in emission luminance occurs between the on period and the off period. Since there is no change, there is still concern about the occurrence of flicker.
Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is a double-speed drive liquid crystal display device that generates an interpolated image frame based on a motion vector of an original image frame, and the entire video An object of the present invention is to provide a liquid crystal display device capable of making motion blur and flicker inconspicuous.

In order to achieve the above object, the present invention provides a motion vector detecting means for detecting a motion vector of each element image included in a video based on at least two consecutive original image frames, and a motion vector detecting means detected by the motion vector detecting means. An interpolated image generating means for generating an interpolated image frame based on a motion vector; and an interpolated image frame generated by the interpolated image generating means is inserted between the two original image frames so that one frame is A double-speed image writing means for dividing the interpolated image frame into the liquid crystal display panel, a plurality of light emitting elements provided corresponding to the divided areas obtained by dividing the display area of the liquid crystal display panel into a plurality of pixels, Light emission control means for individually controlling the light emission luminance of each of the light emitting elements according to the display image of each of the divided areas. It is applied to a liquid crystal display device.
Then, the liquid crystal display device according to the present invention is a specific element that detects a specific element image in which a motion vector detected by the motion vector detection means is a predetermined range of sizes among a plurality of the element images. And a specific light emitting element corresponding to the divided region to which a predetermined range including the periphery of each edge of the specific element image detected by the specific element image detecting means among the plurality of light emitting elements belongs. And a bright and dark lighting means for lighting bright and dark so that the light emission luminance at the time of displaying the interpolated image frame is lower than the light emission luminance at the time of displaying the original image frame.
Here, the predetermined range is set in advance according to the degree of motion blur of the element image. For example, it is a range set in advance as a range from a value at which motion blur of the element image occurs to a value that can be improved by the bright and dark lighting. Specifically, the predetermined range is set in advance as a range from a speed at which motion blur of the element image starts to occur to a speed immediately before the camera where the video is shot becomes noticeable. Can be considered. In human vision, since the vertical direction is more likely to perceive motion blur than the horizontal direction, the lower limit value in the predetermined range is preferably smaller in the vertical direction than in the horizontal direction.
According to the present invention, by appropriately setting the predetermined range, the luminance at the time of display of an interpolated image frame generated based on a motion vector of a certain size that may cause motion blur is determined as the original image. It can be made lower than the frame display time, and motion blur caused by a decrease in the generation accuracy of the interpolated image frame can be suppressed. In addition, bright and dark lighting is performed only for the specific light emitting element corresponding to the edge portion of the specific element image, and bright and dark lighting is not performed for the other light emitting elements, and light emission luminance in each of the original image frame and the interpolated image frame is Therefore, the flicker can be made inconspicuous in the entire image as compared with the case where all the light emitting elements are lit brightly and darkly.

In particular, the light / dark lighting means uses the light emission luminance corresponding to the image of one frame displayed in the divided region corresponding to the specific light emitting element, when the original image frame is displayed and when the interpolated image frame is displayed. It is desirable to control the light emission luminance at the time of displaying the interpolated image frame and the light emission luminance at the time of displaying the original image frame so as to be expressed by the sum of the light emission luminances.
As a result, also for the divided area corresponding to the specific light emitting element, it is possible to obtain a necessary light emission luminance in accordance with one frame image displayed in the divided area, and appropriately maintain the display luminance of the entire image. be able to.

Then, in the liquid crystal display device according to the present invention, the dark lighting means, wherein the specific element image control the specific light emitting elements each light-dark lighting so that the luminance difference between bright and dark lighting is reduced as it gets farther away from the edge portion of the you. As a result, it is possible to prevent the adjacent light emitting elements from feeling uncomfortable due to different lighting modes.
By the way, it can be considered that the larger the motion vector, the lower the generation accuracy of the interpolated image frame and the more noticeable motion blur appears. Therefore, the light / dark lighting means increases the difference between the light emission luminance at the time of displaying the interpolated image frame and the light emission luminance at the time of displaying the original image frame as the motion vector increases. It is desirable to control lighting. As a result, motion blur can be appropriately prevented in conjunction with a decrease in generation accuracy of the interpolated image frame due to the large motion vector.

  According to the present invention, by appropriately setting the predetermined range, the luminance at the time of display of an interpolated image frame generated based on a motion vector of a certain size that may cause motion blur is determined as the original image. It can be made lower than the frame display time, and motion blur caused by a decrease in the generation accuracy of the interpolated image frame can be suppressed. In addition, bright and dark lighting is performed only for the specific light emitting element corresponding to the edge portion of the specific element image, and bright and dark lighting is not performed for the other light emitting elements, and the light emission luminance in each of the original image frame and the interpolated image frame is high. Therefore, the flicker can be made inconspicuous in the entire image as compared with the case where all the light emitting elements are lit brightly and darkly.

1 is a block diagram showing a schematic configuration of a liquid crystal display device according to an embodiment of the present invention. The schematic diagram which shows schematic structure of the backlight of the liquid crystal display device which concerns on embodiment of this invention. The figure for demonstrating an example of the procedure of the backlight control process performed with the liquid crystal display device which concerns on embodiment of this invention. The figure for demonstrating an example of the result of the backlight control process performed with the liquid crystal display device which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
First, a schematic configuration of the liquid crystal display device X according to the embodiment of the present invention will be described with reference to FIG. The liquid crystal display device X is, for example, a television receiver or a display device used for a personal computer.
As shown in FIG. 1, the liquid crystal display device X includes a display control unit 1, a liquid crystal drive unit 2, a backlight control unit 3, a liquid crystal display panel 4, a backlight 5, and the like. The liquid crystal display device X also has other components (a tuner, a speaker, a remote controller, etc.) included in a general television receiver or a display device, but this is particularly different from the prior art. Therefore, the description thereof is omitted in this embodiment.

The display control unit 1 receives a video signal included in a television broadcast received by an antenna (not shown) or a video content input from an external input terminal (not shown), and performs vertical synchronization based on the video signal. Signals and horizontal sync signals are generated. The video signal, the vertical synchronization signal, and the horizontal synchronization signal are input from the display control unit 1 to the liquid crystal driving unit 2. Further, the display control unit 1 inputs the vertical synchronization signal and the horizontal synchronization signal to the backlight control unit 3.
Here, the display control unit 1 outputs a vertical synchronizing signal having a driving frequency of 120 Hz (1 cycle of about 8.3 s), which is twice the frequency of a television broadcast video signal of 60 Hz (1 cycle of about 16.7 s). Generate.
The display control unit 1 detects a motion vector of each elemental image included in the video based on at least two consecutive original image frames. Here, the display control unit 1 when executing the motion vector detection processing corresponds to the motion vector detection means. For example, a detection method based on block matching is generally known as a method for detecting a motion vector. In block matching, a motion vector is detected by dividing a frame into multiple blocks (regions) and calculating the value of the difference evaluation function between the block in the range defined in the current frame and the target block in the next frame. It is a method to do.
The display control unit 1 predicts the motion of each element image based on the detected motion vector, and generates an interpolated image frame to be inserted between the original image frames. Here, the display control unit 1 when executing the generation processing of the interpolated image frame corresponds to the interpolated image generating means. The method for generating the interpolated image frame is a well-known technique and will not be described in detail here.

The display control unit 1 inserts the interpolated image frame between the two original image frames to divide one frame into an original image frame and an interpolated image frame, and outputs the divided frame to the liquid crystal driving unit 2 In the image insertion mode, image writing to the liquid crystal display panel 4 is executed. Here, the display control unit 1 when executing such processing corresponds to double-speed image writing means. Further, the speed is not limited to the double speed with one interpolation image frame, and may be a quadruple speed or an 8 times speed in which a plurality of interpolation image frames are generated and inserted.
The display control unit 1 may selectively execute the interpolation image insertion mode and the multiple display mode in which the same original image frame is inserted a plurality of times between two original image frames. Good. In this case, a later-described backlight control process (see FIG. 3) is executed in the interpolation image insertion mode.

The liquid crystal display panel 4 is formed of a liquid crystal layer, a scan electrode and a data electrode for applying a scan signal and a data signal to the liquid crystal layer, and has a plurality of liquid crystal elements whose transmittance varies depending on an applied voltage. This is an active matrix type liquid crystal panel.
The liquid crystal driving unit 2 connects the scanning electrode (gate electrode) and the data electrode (source electrode) of the liquid crystal display panel 4 based on the video signal, the vertical synchronizing signal, and the horizontal synchronizing signal input from the display control unit 1. Drive. Specifically, after receiving the vertical synchronizing signal, the liquid crystal driving unit 2 outputs a gate signal to the scanning electrode in accordance with the horizontal synchronizing signal corresponding to the first line, and receives the image signal corresponding to the first line as data. Output sequentially to the electrodes. As a result, the first line image is displayed. Thereafter, when the horizontal synchronizing signal corresponding to the second line is input, the liquid crystal driving unit 2 outputs a gate signal to the scanning electrode of the second line and sequentially outputs the image signal corresponding to the second line to the data electrode. Output. Thereafter, the same processing is repeated to display an image on the full screen of the liquid crystal display panel 4.
At this time, the liquid crystal driving unit 2 controls the voltage applied to each liquid crystal element corresponding to each pixel of the liquid crystal display panel 4 based on the image signal input from the display control unit 1, thereby The transmittance of illumination from the backlight 5 of each element is changed to control the display gradation of each liquid crystal element.

Next, the backlight 5 will be described with reference to FIG.
The backlight 5 is disposed on the back surface of the liquid crystal display panel 4 and illuminates the liquid crystal display panel 4 from behind. Specifically, in the example shown in FIG. 2, the backlight 5 includes LEDs 51 (an example of a light emitting element) arranged in a vertical configuration of 28 × 56.
Each of the LEDs 51 is provided corresponding to each of the divided areas Y obtained by dividing the display area of the liquid crystal display panel 4 into a plurality of pixels, and each of the divided areas Y is provided behind the liquid crystal display panel 4. Irradiate from. For example, one divided area Y is composed of 30 vertical pixels × 30 horizontal pixels.
The backlight control unit 3 individually controls the light emission luminance of each of the LEDs 51 according to the display image of each of the divided areas Y. Specifically, it is conceivable to control the light emission luminance by adjusting the power supply to each LED 51 by turning on / off a plurality of changeover switches such as transistors and FETs provided corresponding to each LED 51. . Here, the backlight control unit 3 when performing such control corresponds to light emission control means.

In the liquid crystal display device X, the display control unit 1 and the backlight control unit 3 execute a backlight control process (see the flowchart of FIG. 3), which will be described later, so that each element image included in the video is displayed. The light emission luminance of each LED 51 of the backlight 5 is controlled according to the magnitude of the motion vector.
Hereinafter, an example of the procedure of the backlight control process will be described with reference to the flowchart shown in FIG. 3 are processing procedure (step) numbers by the display control unit 1, and S21, S22,... Shown in FIG. 3B are processing procedures by the backlight control unit 3. (Step) Indicates a number.
Of course, the processing subject of each processing procedure of the backlight control processing described here is merely an example, and is executed by only one of the display control unit 1 and the backlight control unit 3, for example. May be. Further, each processing procedure may be executed by a further subdivided processing circuit.

(Steps S11 to S12)
In step S11, the display control unit 1 detects a motion vector for each element image included in the video from two consecutive original image frames of the input video signal. As described above, this motion vector is also used to create the interpolated image frame.
Subsequently, in step S12, the display control unit 1 detects a specific element image in which the motion vector detected in step S11 is within a predetermined range in the element image. Here, the display control unit 1 when executing such detection processing corresponds to the specific element image detection means.
Here, the predetermined range is set in advance according to the degree of motion blur of the element image. That is, the motion blur of the element image is defined as a range that is not less than a predetermined lower limit threshold and not more than a predetermined upper limit threshold when the degree thereof is digitized. For example, if it is set in advance as a range from a value at which motion blur of the element image occurs to a value (for example, a value below the level of camera blur) that can be improved to some extent by bright and dark lighting (step S22) described later. Good.
Specifically, the predetermined range is set in advance as a range from a speed at which motion blur of the element image starts to occur to a speed immediately before the camera where the video is shot becomes noticeable. Can be considered. In human vision, since the vertical direction is more likely to perceive motion blur than the horizontal direction, the lower limit value in the predetermined range is preferably smaller in the vertical direction than in the horizontal direction.

(Steps S13 to S14)
Next, the display control unit 1 detects an edge portion of each of the specific element images specified in the step S12 (S13). In addition, as a method of detecting the edge portion of the element image, for example, a method of detecting based on a luminance gradient calculated by primary differentiation, or a method of detecting based on a change rate in the luminance gradient calculated by secondary differentiation Conventional methods such as (differential edge detection) may be used.
The display control unit 1 notifies the backlight control unit 3 of the position of each edge portion of the specific element image detected in step S13 (S14). Thereafter, the process returns to step S11, and the same process is repeated for the subsequent frames.

(Step S21)
In step S21, the backlight control unit 3 determines whether or not the position of the edge portion of the specific element image has been notified from the display control unit 1. Here, if there is no specific element image (No side of S21), the process proceeds to step S24. In step S24, the backlight control unit 3 controls the lighting rates of all the LEDs 51 so that the light emission luminance at the time of displaying the original image frame and the interpolated image frame is the same as usual.
On the other hand, if it is determined that the position of the edge portion of the specific element image has been notified (Yes in S21), the process proceeds to step S22.

(Step S22)
Next, in step S <b> 22, the backlight control unit 3 specifies a specific LED 51 (corresponding to a specific light emitting element) to which an edge portion of each of the specific element images belongs among the plurality of LEDs 51.
Then, when the original image frame and the interpolated image frame are displayed, the backlight control unit 3 has a light emission luminance at the time of displaying the interpolated image frame for only the specific LED 51 specified in step S22. Bright and dark lighting is performed so as to be lower than the light emission luminance at the time of displaying the original image frame, and the other LEDs 51 other than the specific LED 51 are normally lighted in the same manner as in step S24 (S23). Here, the backlight control unit 3 when performing such bright and dark lighting corresponds to the bright and dark lighting means. Thereafter, the process returns to step S21, and the same control is executed for the subsequent frames.

Specifically, the backlight control unit 3 controls the light emission luminance when the interpolated image frame is displayed to be at least 1/3 or less than the light emission luminance when the original image frame is displayed. However, if the light emission luminance at the time of display of the interpolated image frame is lowered, the light emission luminance in one frame composed of the interpolated image frame and the original image frame is lowered. Therefore, the backlight control unit 3 uses the light emission luminance corresponding to the image of one frame displayed in the divided area Y corresponding to the specific LED 51 to the light emission luminance at the time of displaying the original image frame and the interpolation image frame. The light emission luminance at the time of display of the interpolated image frame and the light emission luminance at the time of display of the original image frame are controlled so as to be expressed by the total light emission luminance at the time of display. Specifically, the light emission luminance at the time of displaying the original image frame is controlled so as to compensate for the decrease in the light emission luminance at the time of displaying the interpolated image frame. As a result, the light emission luminance in one frame of video can be maintained at a predetermined level.
At this time, the difference in light emission brightness between the bright and dark lighting may be always constant, but the backlight control unit 3 increases the light emission brightness at the time of displaying the interpolated image frame and the original image frame as the motion vector increases. It can be considered that the lighting of each specific LED 51 is controlled so that the difference from the light emission luminance at the time of display becomes large. Accordingly, it is possible to appropriately prevent motion blur according to a decrease in the generation accuracy of the interpolated image frame due to the large motion vector. Of course, the difference in light emission luminance in the bright and dark lighting is set so that the upper and lower limits thereof do not exceed the rated currents of the respective LEDs 51. For example, as the motion vector increases, the difference in light emission brightness for bright and dark lighting increases proportionally (linearly). After that, after the motion vector exceeds a predetermined magnitude, the difference in light emission brightness for light and dark lighting. It is also conceivable to maintain a constant value.

  As described above, in the liquid crystal display device X, by appropriately setting the predetermined range, an interpolated image frame generated based on a motion vector of a certain size that may cause motion blur is generated. The brightness at the time of display can be made lower than that at the time of displaying the original image frame, and motion blur caused by a decrease in the generation accuracy of the interpolated image frame can be suppressed. Moreover, in the liquid crystal display device X, only the specific LED 51 corresponding to the edge portion of the specific element image is lit bright and dark, and the other LED 51 is not lit bright and dark, and the original image frame and the interpolated image frame. Since the light emission luminances are the same, flicker can be made inconspicuous as a whole image as compared with the case where all the LEDs 51 are lit brightly and darkly.

Hereinafter, an example of the execution result of the backlight control process will be described with reference to FIG. FIG. 4 shows a case where the element images F1 and F2 move at a constant speed from the state shown in FIG. 4A to the state shown in FIG. 4E and stop. 4A, 4C, and 4E are original image frames, and FIGS. 4B and 4D are interpolation image frames.
Here, the element image F1 that moves as shown in FIGS. 4A to 4E does not belong to the predetermined range in the size of the motion vector, and the element image F2 has the size of the motion vector in the predetermined range. Suppose that it belongs to the range. That is, only the element image F2 is the specific element image, and the LED 51 corresponding to the divided region Y to which the edge portion of the element image F2 belongs is the specific LED 51.

In this case, when the backlight control process is executed, the element image as the specific element image belonging to the predetermined range based on the motion vector detected by the display control unit 1 in the step S11. Only F2 is detected (S12). Then, the display control unit 1 detects the edge portion of the element image F2 (S13), and notifies the position to the backlight control unit 4 (S14).
Thereby, when the backlight control unit 4 receives the notification of the edge portion of the specific element image (Yes side of S21), the backlight control unit 4 corresponds to the position of the edge portion of the element image F2. The specific LED 51 is specified (S22), and only the specific LED 51 is lit brightly and darkly so that the emission luminance when displaying the interpolated image frame is lower than the emission luminance when displaying the original image frame. (S23).

Here, FIG. 4 (f) shows the light emission luminance of the specific LED 51 belonging to the edge portion of the element image F 2, and FIG. 4 (g) shows the light emission luminance of the other LEDs 51 excluding the specific LED 51. The broken lines shown in FIGS. 4 (f) and 4 (g) indicate the light emission luminance determined according to the image of one frame displayed in the divided area Y corresponding to each of the LEDs 51.
As shown in FIG. 4 (f), the emission brightness of the specific LED 51 at the time of displaying the original image frame is higher than the emission brightness (broken line) corresponding to the display image of the divided area Y corresponding to the specific LED 51. It has become. On the other hand, the light emission luminance of the specific LED 51 in the interpolation image frame is lower than the light emission luminance (broken line) corresponding to the display image of the divided area Y corresponding to the specific LED 51. In this way, since the light emission luminance at the time of display of the interpolated image frame is lower than the light emission luminance at the time of display of the original image frame, motion blur caused by a decrease in generation accuracy of the interpolated image frame, Edge blurring is prevented.
At this time, the light emission luminance of the specific LED 51 at the time of displaying the original image frame is the light emission luminance corresponding to the image of one frame displayed in the divided area Y corresponding to the specific LED 51 at the time of displaying the original image frame. Is set to be high so as to compensate for the decrease in the light emission luminance of the specific LED 51 at the time of display of the interpolation image frame. Therefore, the brightness of the entire video can be maintained appropriately.
On the other hand, as shown in FIG. 4G, for the other LEDs 51 other than the specific LED 51, the emission luminance when the original image frame is displayed and the emission luminance when the interpolation image frame is displayed are the same. It is a level. Therefore, compared to the case where all the LEDs 51 are lit brightly and darkly, it is possible to make it difficult to feel flicker in the entire display image of the liquid crystal display panel 4.
In addition, since the element images F1 and F2 are stopped after the original image frame in FIG. 4E, the LED 51 corresponding to each of the element images F1 and F2 is usually as shown in FIG. Lights up.

By the way, in this Embodiment, the case where only said LED51 to which the edge part of the said specific element image belongs was made into specific LED51 was demonstrated.
On the other hand, the backlight control unit 3 changes the LED 51 corresponding to the divided region Y to which a neighboring region including an edge portion of each specific element image (a predetermined range including the periphery of the edge portion) belongs. It is also conceivable to light it up and down.
In particular, in this case, it is desirable that the backlight control unit 3 controls the light / dark lighting of each of the specific LEDs 51 so that the brightness difference of the light / dark lighting decreases as the distance from the edge portion of the specific element image increases. As a result, the difference in light emission luminance at the edge portion of the specific element image is the highest, and the difference in light emission luminance gradually decreases as it goes to the periphery, so that the light emission luminance between the specific LED 51 and the LED 51 adjacent thereto is reduced. A sense of incongruity due to a difference in lighting mode can be made inconspicuous.

  The present invention can be applied to a liquid crystal display device such as a liquid crystal television receiver or a liquid crystal display device.

1: Display control unit 2: Liquid crystal drive unit 3: Backlight control unit 4: Liquid crystal display panel 5: Backlight 51: LED
F1, F2: Element image X: Liquid crystal display device Y: Divided areas S11, S12,...: Processing procedure (step) numbers S21, S22,.

Claims (3)

Motion vector detecting means for detecting a motion vector of each element image included in the video based on at least two consecutive original image frames, and generating an interpolated image frame based on the motion vector detected by the motion vector detecting means An interpolated image generating means and an interpolated image frame generated by the interpolated image generating means are inserted between the two original image frames to divide one frame into an original image frame and an interpolated image frame, and to the liquid crystal display panel. A double speed image writing means for writing, a plurality of light emitting elements provided corresponding to each of the divided areas obtained by dividing the display area of the liquid crystal display panel for each of a plurality of pixels, and the display image of each of the divided areas A liquid crystal display device comprising a light emission control means for individually controlling the light emission luminance of each light emitting element,
Specific element image detection means for detecting a specific element image in which a motion vector detected by the motion vector detection means among a plurality of the element images has a preset size in a predetermined range;
Among the plurality of light emitting elements, only the specific light emitting element corresponding to the divided region to which a predetermined range including the periphery of each edge of the specific element image detected by the specific element image detecting means belongs is interpolated. Light / dark lighting means for lighting bright and dark so that the light emission luminance at the time of display of the image frame is lower than the light emission luminance at the time of display of the original image frame;
Ri name with a,
The liquid crystal display device , wherein the light / dark lighting means controls light / dark lighting of each of the specific light emitting elements so that a luminance difference of light / dark lighting decreases as the distance from the edge portion of the specific element image increases . The bright and dark lighting means has a light emission luminance corresponding to one frame of video displayed in the divided region corresponding to the specific light emitting element, a light emission luminance when displaying the original image frame and a light emission when displaying the interpolated image frame. 2. The liquid crystal display device according to claim 1, wherein the light emission luminance at the time of displaying the interpolated image frame and the light emission luminance at the time of displaying the original image frame are controlled so as to be expressed by a sum of luminance. The bright and dark lighting means performs the bright and dark lighting of each of the specific light emitting elements so that the difference between the light emission luminance at the time of displaying the interpolated image frame and the light emission luminance at the time of displaying the original image frame increases as the motion vector increases. the liquid crystal display device according to claim 1 or 2, characterized in that control.

Images