WO2014026365A1 - 一种用于降低快门式3d液晶动态串扰的方法、装置以及液晶显示器 - Google Patents

一种用于降低快门式3d液晶动态串扰的方法、装置以及液晶显示器 Download PDF

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WO2014026365A1
WO2014026365A1 PCT/CN2012/080249 CN2012080249W WO2014026365A1 WO 2014026365 A1 WO2014026365 A1 WO 2014026365A1 CN 2012080249 W CN2012080249 W CN 2012080249W WO 2014026365 A1 WO2014026365 A1 WO 2014026365A1
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Prior art keywords
grayscale
value
right eye
current frame
eye
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PCT/CN2012/080249
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English (en)
French (fr)
Inventor
陈宥烨
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深圳市华星光电技术有限公司
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Priority to DE112012006485.2T priority Critical patent/DE112012006485B4/de
Priority to US13/643,082 priority patent/US8928561B2/en
Publication of WO2014026365A1 publication Critical patent/WO2014026365A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/398—Synchronisation thereof; Control thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

Definitions

  • the invention relates to a method, a device and a liquid crystal display for reducing the dynamic crosstalk of a shutter type 3D liquid crystal.
  • the application is submitted to the Chinese Patent Office on August 14, 2012, and the application number is 201210288236.0.
  • the invention name is "a type of shutter 3D reduction"
  • the present invention relates to a shutter type 3D liquid crystal display technology, and more particularly to a method and apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal and a corresponding liquid crystal display. Background technique
  • the shutter type 3D liquid crystal display works by causing the liquid crystal panel to sequentially display the left eye image and the right eye image, and simultaneously control the closing of the shutter eyepiece to make the left eye image of the left eye and the right eye image of the right eye. If the left eye sees the right eye image and the right eye sees the left eye image, the human eye will feel crosstalk.
  • the liquid crystal panel Since the liquid crystal has a hold characteristic, the liquid crystal panel always has an unresponsive image when displaying one frame of image. If the liquid crystal panel itself cannot distinguish the left and right eye images, How people adjust the synchronization of the shutter mirror, there will always be crosstalk. In particular, when the image of the current left eye and the image of the left eye of the previous frame and the image of the current right eye and the image of the right eye of the previous frame change, this crosstalk phenomenon is more likely to occur, and we will Crosstalk that occurs (left and right eye crosstalk due to moving images) is called dynamic crosstalk.
  • the usual method is to compress the time of image data transmission per frame, or to use the backlight scanning technology to improve the dynamic response of the image, or to simultaneously drive the left and right eyes simultaneously (ie, adjust the gray scale).
  • the inventors have found that the technique of using backlight scanning can reduce the display crosstalk to a certain extent, but the effect is limited and the cost is high; the method of compressing the data transmission time of each frame is limited due to the compression ratio. System, the effect of reducing display crosstalk is still limited; dynamic driving of the left and right eyes at the same time will increase the static left and right eye crosstalk. Therefore, in general, the prior art is not effective in reducing the crosstalk problem existing in the shutter type 3D liquid crystal display. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a method, device and liquid crystal display for reducing the dynamic crosstalk of a shutter type 3D liquid crystal to effectively reduce the left and right eye dynamic crosstalk problems of the shutter type 3D liquid crystal display.
  • an embodiment of the present invention provides a method for reducing dynamic crosstalk of a shutter-type 3D liquid crystal, including:
  • the gray-scale value of the one-eye image of each pixel of the current frame is adjusted according to the gray-scale comparison table corresponding to the scan line of each pixel point. Adjusting a grayscale value of each pixel point of one eye image of the current frame to each target grayscale value corresponding thereto;
  • One of the eye images of all the scan lines in the current frame adjusted by the gray scale is displayed, and the other eye image of the current frame that has not been adjusted.
  • the grayscale comparison table of each scan line is pre-defined, and the combination of the left and right eye grayscale values of each current frame in the grayscale comparison table corresponds to a target grayscale value, the target grayscale value Includes left eye target grayscale value or right eye target grayscale value.
  • the step of displaying one eye of all the scan lines of the current frame after grayscale adjustment, and the step of adjusting the other eye image of the current frame further comprising:
  • One of the grayscale-adjusted images is buffered so that the grayscale-adjusted image and the other unadjusted image are sequentially displayed.
  • the comparison result is a grayscale value of one of the image points of each pixel of the current frame that is different between the current frame and the left and right eye grayscale values of the previous frame, according to the gray corresponding to the scan line of each pixel point.
  • the order comparison table is adjusted to adjust the grayscale value of each pixel of the one-eye image of the current frame.
  • the steps of the gray level value corresponding to each target are as follows:
  • each target grayscale value in the grayscale comparison table corresponding to each scan line satisfies the following conditions:
  • the measurement obtains the a lowest brightness value or a maximum brightness value of one of the pixels of the current frame as a reference brightness value
  • the gray scale value of the corresponding eye in the left and right target gray scale value combination of the current frame is replaced with the target gray scale value to form an adjusted left and right eye gray scale value combination. And measuring a minimum brightness value or a maximum brightness value of the adjusted left and right target gray level value combination, and the deviation from the corresponding reference brightness value is within 3%.
  • an apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal comprising:
  • a receiving unit configured to receive digital information of a left eye image and a right eye image of the current frame
  • a comparing unit configured to compare a left and right target grayscale value combination of each pixel in each scanning line of the current frame with a corresponding position of a previous frame Whether the left and right eye gray value combinations are the same
  • a gray level adjusting unit configured to compare the comparison result of the comparing unit to a gray P value of one of the pixels of each pixel point different from the previous frame and the left and right eye gray P media values according to the pixel points Adjusting, according to the gray scale comparison table corresponding to the scan line, adjusting the grayscale value of each pixel of the one eye image of the current frame to the corresponding target grayscale value;
  • the display unit is configured to display one of the eye images adjusted by the grayscale of all scan lines of the current frame, and another eye image whose current frame is not adjusted.
  • the method further comprises:
  • a gray scale comparison table storage subunit configured to store a gray scale comparison table corresponding to each scan line, The combination of the left and right eye grayscale values of each current frame in the grayscale comparison table corresponds to a target grayscale value, and the target grayscale value includes a left eye target grayscale value or a right eye target grayscale value;
  • the image storage subunit is configured to store digital information of the left frame image and the right eye image of the previous frame.
  • the method further comprises:
  • a buffer unit configured to buffer an image of one of the grayscale adjustments, so that the grayscale adjusted image and the other unadjusted image are sequentially displayed.
  • the grayscale adjustment unit comprises:
  • a target determining subunit configured to search for the left and right eye image values stored in the grayscale reference table storage subunit according to a combination of left and right eye grayscale values of respective pixel points whose left and right eye grayscale values are different according to the comparison result.
  • the gray scale comparison table corresponding to the scan line where the point is located, and find the gray scale values of the respective targets corresponding to the grayscale values of the left and right eyes;
  • the adjustment subunit is configured to adjust the gray P value of the left eye at the different pixel points in the current frame to compare the grayscale values of the left and right eye grayscale values of the previous frame to the corresponding left eye target gray P In the mediation value, or adjust the grayscale value of the right eye to the corresponding right eye target grayscale value.
  • each target grayscale value in the grayscale comparison table corresponding to each scan row satisfies the following conditions:
  • the measurement is obtained. Depicting a lowest brightness value or a maximum brightness value of one of the pixels of the current frame as a reference brightness value;
  • the corresponding gray scale value in the left and right target gray scale value combination of the current frame is replaced with the target gray scale value to form an adjusted left and right eye gray scale value combination. And measuring a minimum brightness value or a maximum brightness value of the adjusted left and right eye grayscale value combination, and the deviation from the corresponding reference brightness value is within 3%.
  • an embodiment of the present invention provides a liquid crystal display comprising the apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal according to any of the preceding claims.
  • a method, device and liquid crystal display for reducing dynamic crosstalk of a shutter type 3D liquid crystal provided by an embodiment of the present invention have the following beneficial effects:
  • a grayscale comparison table for each scan line and storing it in a 3D liquid crystal display Medium.
  • the apparatus and method of the present invention are applied to a low-cost full-side flickering 3D liquid crystal display, which can achieve a low degree of left and right eye crosstalk of a scanning backlight, and the apparatus and method of the present invention are applied to a slow reaction time.
  • the left and right eye crosstalk can also be reduced or eliminated, so that the cost of the left and right eye crosstalk eliminated or reduced by the 3D liquid crystal display can be reduced to some extent.
  • FIG. 1 is a schematic structural view of an embodiment of an apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal according to the present invention
  • FIG. 2 is a schematic structural view of a gray scale adjusting unit of FIG. 1;
  • FIG. 3 is a schematic diagram of an embodiment of a gray scale comparison table in the apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal according to the present invention
  • FIG. 4 is a schematic diagram of another embodiment of a gray scale comparison table in the apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal according to the present invention
  • FIG. 5 is a flow chart showing an embodiment of a method for reducing dynamic crosstalk of a shutter-type 3D liquid crystal according to the present invention
  • FIG. 6 is a schematic diagram of a luminance-time curve without gray scale adjustment in an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a luminance-time curve after gray scale adjustment in an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of an embodiment of an apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal according to the present invention
  • the apparatus for reducing dynamic crosstalk of a shutter type 3D liquid crystal according to the present invention is disposed in a flash type 3D liquid crystal display. Specifically, it can be disposed on the original 3D signal input end of the flash type 3D liquid crystal display and the intermediate path for transmitting the 3D signal to the liquid crystal array display.
  • the present invention can be specifically implemented by using a processing chip and peripheral circuits.
  • the apparatus of the present invention comprises:
  • the receiving unit 10 is configured to receive digital information of a left eye image and a right eye image of the current frame, where the received digital information includes an original grayscale value of each pixel in the left eye image of the current frame, and a right eye image of the current frame.
  • the comparison unit 11 is configured to compare whether the combination of the left and right eye grayscale values of each pixel in each scan line of the current frame received by the receiving unit 10 and the left and right eye grayscale value combinations of the corresponding positions of the previous frame are the same; At each pixel position, the grayscale value of the left eye image in the current frame is compared with the grayscale value of the left eye image in the previous frame, and the grayscale value of the right eye image in the current frame is compared with the previous frame. The grayscale values of the middle right eye image are compared.
  • the grayscale adjustment unit 12 is configured to adjust the grayscale value of each corresponding image point of each scan line of the right eye image and the left eye image according to the comparison result of the comparison unit 11, specifically including:
  • the comparison result of the comparison unit 11 is that the grayscale value of one of the image points (the left eye image or the right eye image) of each pixel point different from the current frame and the left and right eye grayscale values of the previous frame is according to the position of the pixel point. Adjusting the grayscale comparison table corresponding to the scan line, and adjusting the grayscale value of each pixel of the current image (the left eye image or the right eye image) of the current frame to the corresponding target grayscale value;
  • the buffer unit 14 is configured to cache an image in which one eye has been adjusted by grayscale, and to form an image with another image that has not been adjusted by grayscale. It can be understood that, in other embodiments, the image may also be cached.
  • the image that has not been adjusted by the grayscale is formed in sequence with the image of the other eye that has been adjusted by the grayscale.
  • the display unit 15 displays one of the images of all the scan lines of the current frame that have been adjusted by the gray scale, and another image of the current frame that has not been adjusted.
  • a storage unit 13 for the gray scale comparison table mentioned above and the image information of the previous frame includes: a gray scale comparison table storage sub-unit 130, configured to store a grayscale comparison table corresponding to each scan line, where a combination of left and right eye grayscale values of each current frame in the grayscale comparison table corresponds to a target grayscale value,
  • the image storage sub-unit 132 is configured to store digital information of the left-eye image and the right-eye image of the previous frame.
  • the grayscale adjustment unit 12 includes:
  • the target determining sub-unit 120 is configured to search for the left and right eye grayscale value combinations of the respective pixel points whose left and right eye grayscale values are different according to the comparison result in the comparing unit 11, and search for the stored in the grayscale comparison table storage subunit 130.
  • a gray scale comparison table corresponding to a scan line where each of the left and right eye image pixels is located, and each target gray scale value corresponding to each left and right eye grayscale value is found;
  • the adjusting sub-unit 122 is configured to adjust a grayscale value of a left eye at a pixel point where all comparison results in the current frame are different to respective left eye target grayscale values, or a gray P of the right eye thereof The median values are adjusted to their respective right eye target grayscale values.
  • the gray scale comparison table corresponding to each scan line is previously stored in the storage unit 13.
  • the grayscale comparison tables corresponding to the different scan lines are stored in a separate form.
  • the scan line of the screen can be divided into a number of regions (e.g., every 5 scan lines as one region), and the same grayscale look-up table can be used for each scan line in the same region.
  • FIG. 3 a schematic diagram of an embodiment of a gray-P reference table in a device for reducing dynamic crosstalk of a shutter-type 3D liquid crystal according to the present invention, which shows a case where the left-eye grayscale value of the current frame is adjusted.
  • FIG. 3 is a grayscale comparison table corresponding to the first scan line.
  • the left and right eye grayscale values of the pixel points are combined to be 255/1, that is, the pixel of the left eye image
  • the grayscale value is 255
  • the grayscale of the pixel in the right eye image is 1; for example, the combination of the left and right eye grayscale values at the corresponding position of the previous frame is 200/30, it is known that the position of the current frame is about
  • the combination of the grayscale value of the eye and the grayscale value of the previous frame are different (that is, the grayscale values of the left eye and the right eye are different from those of the previous frame), and the current frame gray is found from the grayscale comparison table.
  • the order value combination (255/1) has a grayscale value of 249 corresponding to the left eye target, that is, the grayscale value of the pixel of the left eye image needs to be adjusted from 255 to 249, and the image of the left and right eye images is found in the photo table. .
  • the pixel points of other positions of the scan line are as long as the left and right eye gray scale values are combined with the previous one.
  • the combination of the left and right eye grayscale values of the frame may be different, and the target grayscale comparison table may be used for adjustment.
  • each target grayscale value in the grayscale comparison table corresponding to each scan row satisfies the following condition: the left and right eye grayscale values of each current frame of a certain pixel point of each scan line are combined, and the previous one When the combination of the left and right eye grayscale values of the pixel and the pixel of the frame is unchanged, the lowest brightness value or the maximum brightness value of one of the pixels of the current frame is obtained as a reference brightness value;
  • the gray scale value of one eye in the combination of the left and right eye gray scale values of the current frame is replaced with the target gray scale value to form an adjusted left and right eye gray scale value combination, and the measurement is performed.
  • the adjusted minimum brightness value or maximum brightness value of the left and right eye gray scale value combination is within 3% of the corresponding reference brightness value.
  • FIG. 4 it is a schematic diagram of another embodiment of the gray scale comparison table in the apparatus for reducing the dynamic crosstalk of the shutter type 3D liquid crystal according to the present invention, which shows the case where the right eye grayscale value of the current frame is adjusted. ;
  • Figure 4 is a grayscale comparison table corresponding to the first scan line.
  • the left and right eye grayscale values of the pixel points are combined to be 255/1, that is, the pixel of the left eye image
  • the grayscale value is 255
  • the grayscale of the pixel of the right eye image is 1; for example, the combination of the left and right target grayscale values at the corresponding position of the previous frame is 200/30, it is known that the position of the current frame is
  • the combination of the left and right eye grayscale values is different from the grayscale value combination of the previous frame (ie, the grayscale values of the left and right eyes are different from the previous frame), and the current frame is found from the grayscale comparison table.
  • the grayscale value combination (255/1) has a corresponding grayscale value of the right eye target of 22, that is, the grayscale value of the pixel of the right eye image needs to be adjusted from 1 to 22, and the pixels of the left and right eye images have corresponding scans.
  • the pixels of other positions of the row may be adjusted by using the target gray scale comparison table as long as the combination of the left and right eye grayscale values is different from the combination of the left and right eye gray P mediators of the previous frame.
  • FIG. 5 it is a schematic flowchart of one embodiment of a method for reducing dynamic crosstalk of a shutter type 3D liquid crystal according to the present invention. It includes the following processes:
  • Step S50 Receive digital information of a left eye image and a right eye image of the current frame, where the received digital information of the left eye image and the right eye image of the current frame includes an original gray P value of each pixel in the left eye image of the current frame. And an original gray P value of each pixel in the right eye image of the current frame;
  • Step S51 Comparing whether the combination of the left and right eye grayscale values of each pixel in the current scanning line of the current frame and the left and right eye grayscale value combinations of the corresponding positions of the previous frame are the same, specifically, at each pixel position, The grayscale value of the left eye image in the current frame is compared with the grayscale value of the left eye image in the previous frame, and the grayscale value of the right eye image in the current frame is compared with the grayscale value of the right eye image in the previous frame. Comparison.
  • step S51 If the result of the comparison in step S51 is that the current frame is different from the left and right eye grayscale values of the previous frame, the flow goes to step S52; if the result of the comparison in step S51 is that the grayscale value of one eye is the same, the flow turns Go to step S55; until all pixel points in the current scan line are compared end;
  • Step S52 the grayscale value of one eye image (left eye image or right eye image) of each pixel point whose comparison result is different between the current frame and the left and right eye grayscale values of the previous frame in step S51 is according to the pixels. Adjusting the grayscale value table corresponding to the scan line of the position where the point is located, and adjusting the grayscale value of each pixel of the current image (the left eye image or the right eye image) of the current frame to the corresponding grayscale of each target The grayscale comparison table of each scan line is pre-defined, and the combination of the left and right eye grayscale values of each current frame in the grayscale comparison table corresponds to a target grayscale value, where the target grayscale value includes Left eye target grayscale value or right eye target grayscale value.
  • the gray scale comparison table corresponding to the scan line in which the pixel points are stored in advance is searched, and the left and right eyes of the current frame of each pixel point are found. a grayscale value corresponding to each target grayscale value;
  • Adjusting the gray P value of one of the images at different pixel points to the respective target grayscale values for example, adjusting the grayscale value of the left eye of each position to its corresponding The left eye target grayscale value, or the grayscale value of the right eye thereof is adjusted to the corresponding right eye target grayscale value.
  • Step S53 after the grayscale adjustment of the pixel point in a certain eye of the current scanning line of the current frame is finished, further determining whether the grayscale value of the pixel point of all the scanning lines in the eye in the current frame has been adjusted.
  • step S54 the next scan line is set as the current scan line, and the flow proceeds to step S51, and the grayscale value of each pixel of the left and right eye images in the next scan line is performed. Adjustment;
  • step S55 one of the images of all the scan lines of the current frame, which have been adjusted by the gray scale, and the other image of the current frame that has not been adjusted are displayed.
  • step S55 further comprising, in step S55,: buffering one of the eyes (for example, the grayscale adjusted image), and the other eye image (for example, the image adjusted without gray P) ) so that the two-eye image can be transmitted and displayed in order.
  • the eyes for example, the grayscale adjusted image
  • the other eye image for example, the image adjusted without gray P
  • each target grayscale value in the grayscale comparison table corresponding to each scan row satisfies the following conditions:
  • the measurement obtains the a lowest brightness value or a maximum brightness value of one of the pixels of the current frame as a reference brightness value
  • the gray scale value of one eye in the combination of the left and right eye gray scale values of the current frame is replaced with the target gray scale value to form an adjusted left and right eye gray scale value combination, and the measurement is performed.
  • the adjusted minimum brightness value or maximum brightness value of the left and right eye gray scale value combination is within 3% of the corresponding reference brightness value.
  • FIG. 6 it is a schematic diagram of a luminance-time curve which is not adjusted by gray scale in one embodiment of the present invention. It can be seen that, in this embodiment, it is assumed that the first pixel of the first scanning line is taken as an example, and the left and right target grayscale combinations of four consecutive frames (from N-1 frame to N+1 frame) are respectively 220/220, 100/200, 100/200, 100/200.
  • Figure 6 is a luminance-time curve at the four frames obtained by measurement by a photo sensor. It can be seen that, in the Nth frame, the combination of the left and right eye grayscale values is different from the combination of the left and right eye grayscale values of the previous frame (the N-1th frame), in a single-zone flashing LED.
  • this phenomenon is caused by insufficient liquid crystal reaction time.
  • the phenomenon of crosstalk caused by left and right eye dynamics Ideally, when the left and right eye grayscale values are changed from 220/220 to 100/200, after stabilization, the brightness should be between f (29%) and h (77%). , we call f and h as the minimum reference brightness value and the maximum reference brightness value, respectively.
  • the actual measured luminance value of the current frame is between e (38%) and g (87%). Therefore, the combination of the left and right eye gray scale values changes at the same time, and there is a deviation between the brightness value displayed in the 3D liquid crystal display and the reference brightness value, thereby causing the occurrence of dynamic crosstalk between the left and right eyes. Therefore, it is necessary to find a way to adjust the brightness value of the pixel display of the current frame (Nth frame) to reach or connect to the reference brightness value.
  • the measurement is performed. Obtaining a lowest brightness value or a maximum brightness value of one of the pixels of the current frame as a reference brightness value;
  • Fig. 7 it is a luminance-time curve which is adjusted by gray scale in one embodiment of the present invention. It can be seen that after adjustment, the maximum value (g) and the minimum value (e) of the brightness displayed by the pixel in the current frame (Nth frame) are made equal to f and h, respectively. This adjustment is achieved by changing the left-eye grayscale value of the current frame. As can be seen from the figure, the left-eye grayscale value of the current frame is adjusted from the original 100 to 70. This establishes a correspondence, that is, the current left and right eye grayscales are combined to adjust the left eye grayscale in the 100/200 to 70, that is, the brightness of the current frame can be made to meet its expected reference luminance value (or curve). Therefore, the left and right eye grayscale values are combined 100/200, and the left eye grayscale value is adjusted to the target grayscale value 70 as a correspondence relationship.
  • the target grayscale values corresponding to the combination of other left and right eye grayscale values in the scan line can be obtained, thereby forming a grayscale comparison table corresponding to the scan line shown in FIG.
  • the gray scale comparison table corresponding to each scan line is completed, it is stored in the memory of the 3D liquid crystal display.
  • the right eye can also be adjusted.
  • the right eye target grayscale value corresponding to each left and right target grayscale combination can be found by the measurement, thereby forming a grayscale comparison table with the one shown in FIG.
  • the principle is the same as the principle of forming the gray scale reference table shown in FIG. 3, and will not be described in detail herein.
  • the selection of the target grayscale value may be performed without being fully adjusted to the expected maximum value (h) and the minimum value (f), for example, the adjusted grayscale value combination may be displayed.
  • the difference between the brightness of the brightness and its reference brightness value (for example, 3%) can also substantially achieve the object of the present invention, that is, meet:
  • the gray scale comparison table at the current scan line is not unique, but if the gray scale comparison table has been stored Then, when the two-dimensional static signal is adjusted in FIG. 5, the stored gray scale comparison table is called.
  • an eye of the current frame (left eye or right eye) may be used.
  • the grayscale value is adjusted to a pre-confirmed target grayscale value such that the brightness displayed at the pixel point of the current frame reaches or approaches its reference luminance value.
  • the present invention further provides a flash type 3D liquid crystal display comprising the apparatus for reducing the dynamic crosstalk of a shutter type 3D liquid crystal described in the above-mentioned FIG. 1 to FIG. 2, and the implementation principle thereof can be combined with the above-mentioned FIG. 1 to FIG. 7 Description, all the details are combined with the above description of FIG. 1 to FIG. 7, and will not be described herein.
  • the present invention is implemented by obtaining a gray scale comparison table for each scanning line in advance and storing it in a 3D liquid crystal display. After receiving the left and right eye image signals of the current frame in the 3D liquid crystal display, comparing whether the combination of the left and right eye grayscale values of each pixel in each scan line of the current frame and the left and right eye grayscale value of the corresponding position of the previous frame are the same, if When the values are different, the corresponding pixel points are adjusted according to the grayscale comparison table, that is, the grayscale value of each pixel of the current image of the current frame is adjusted to the corresponding grayscale value of the corresponding target, and the above adjustment can be reduced. Or eliminate crosstalk from the left and right eyes.
  • the apparatus and method of the present invention are applied to a low-cost full-side flickering 3D liquid crystal display, which can achieve a low degree of left and right eye crosstalk of a scanning backlight, and the apparatus and method of the present invention are applied to a slow reaction time.
  • the left and right eye crosstalk can also be reduced or eliminated, so that the cost of the left and right eye crosstalk eliminated or reduced by the 3D liquid crystal display can be reduced to some extent.

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Abstract

一种用于降低快门式3D液晶动态串扰的方法，包括：接收当前帧左眼图像与右眼图像的数字信息；比较当前帧每一扫描行中各像素点的左右眼灰阶值组合与上一帧相应位置的左右眼灰阶值组合是否相同；将比较结果为左右眼灰阶值均不同的各个像素点的其中一眼图像的灰阶值根据所述各像素点所处扫描行对应的灰阶对照表进行调整，将当前帧其中一眼图像的所述各像素点的灰阶值调整为与其对应的各目标灰阶值；显示当前帧所有扫描行均经灰阶调整后的其中一眼图像，以及当前帧未经调整的另一眼图像。还公开了一种用于降低快门式3D液晶动态串扰的装置及相应的液晶显示器。通过该用于降低快门式3D液晶动态串扰的方法或装置，可以明显消除或减少左右眼串扰。

Description

一种用于降低快门式 3D液晶动态串扰的方法、 装置以及液 晶显示器 本申请要求于 2012 年 8 月 14 日提交中国专利局、 申请号为 201210288236.0、 发明名称为 "一种用于降低快门式 3D液晶动态串扰的方 法、 装置以及液晶显示器" 的中国专利申请的优先权， 上述专利的全部内容 通过引用结合在本申请中。 技术领域
本发明涉及快门式 3D液晶显示技术，尤其涉及一种用于降低快门式 3D 液晶动态串扰的方法、 装置以及相应的液晶显示器。 背景技术
快门式 3D液晶显示的工作原理是使液晶面板依次显示左眼图像和右眼 图像， 同时控制快门目艮镜的闭合来使人的左眼看到左眼图像， 右眼看到右眼 图像。 如果左目艮看到了右眼图像， 右眼看到了左眼图像， 人眼就会感到串扰 现象。
液晶由于存在保持（hold )特性， 其存在一定的反应时间， 导致液晶面 板在显示一帧图像时总是会残留上一帧未响应完的图像，如果液晶面板本身 无法区分左右眼的图像， 无论人们如何调整快门目艮镜的同步， 总是会存在串 扰的现象。 特别是， 当当前左眼的图像与前一帧左眼的图像和当前右眼的图 像与前一帧的右眼图像均发生了变化， 则这种串扰现象更容易发生， 我们将 这种情形发生的串扰（由于动态图像产生的左右眼串扰）称为动态串扰。
为了降低该串扰和动态串扰，通常的方法是压缩每帧图像数据传输的时 间， 或者采用背光扫描的技术， 提高图像的动态响应， 或者是对左右眼同时 进行动态驱动 （即灰度的调整）。
发明人发现， 采用背光扫描的技术在一定程度上会降低显示串扰， 但效 果有限且成本高； 采用压缩每帧图像数据传输时间的方式由于压缩率的限 制， 降低显示串扰的效果仍然有限； 对左右眼同时进行动态驱动， 会使静态 的左右眼串扰增加。 因此总体而言， 现有技术在降低快门式 3D液晶显示器 存在的串扰问题时效果欠佳。 发明内容
本发明所要解决的技术问题在于， 提供一种用于降低快门式 3D液晶动 态串扰的方法、 装置以及液晶显示器， 以有效地降低快门式 3D液晶显示器 存在的左右眼动态串扰问题。
为了解决上述技术问题， 一方面， 本发明的实施例提供了一种用于降低 快门式 3D液晶动态串扰的方法， 包括：
接收当前帧左眼图像与右眼图像的数字信息；
比较当前帧每一扫描行中各像素点的左右眼灰阶值组合与上一帧相应 位置的左右眼灰阶值组合是否相同；
将比较结果为当前帧与上一左右眼灰阶值均不同的当前帧各个像素点 的其中一眼图像的灰阶值，根据所述各像素点所处扫描行对应的灰阶对照表 进行调整，将当前帧其中一眼图像的所述各像素点的灰阶值调整为与其对应 的各目标灰阶值；
显示当前帧中所有扫描行均经灰阶调整后的其中一眼图像， 以及当前帧 中未经调整的另一眼图像。
优选地， 所述每一扫描行的灰阶对照表均被预先定义， 所述灰阶对照表 中每一当前帧左右眼灰阶值组合对应于一个目标灰阶值， 所述目标灰阶值包 括左眼目标灰阶值或右眼目标灰阶值。
优选地， 所述显示当前帧所有扫描行均经灰阶调整后的其中一眼图像， 以及当前帧未经调整另一眼图像步骤， 进一步包括：
緩存其中一眼经灰阶调整后的图像， 以使所述经灰阶调整后的图像与另 一眼未经调整的图像按顺序显示。
优选地， 所述将比较结果为当前帧与上一帧左右眼灰阶值均不同的当前 帧各个像素点的其中一眼图像的灰阶值，根据所述各像素点所处扫描行对应 的灰阶对照表进行调整，将当前帧其中一眼图像的所述各像素点的灰阶值调 整为与其对应的各目标灰阶值的步骤具体为：
根据比较结果均为不同的各像素点的位置，搜索预先存储的所述像素点 所处的扫描行对应的灰阶对照表，找到与各像素点当前帧左右眼灰阶值组合 相对应的各目标灰阶值；
用于将当前帧中所有与前一帧左右眼灰 P介值比较结果均为不同的像素 点处的左眼的灰阶值调整到与其对应的各个左眼目标灰阶值上， 或者将其右 眼的灰阶值均调整到与其对应的各个右眼目标灰阶值上。
优选地， 每一扫描行对应的灰阶对照表中的各目标灰阶值满足下述条 件：
在每一扫描行的某个像素点的各种当前帧左右眼灰阶值组合 ,且其前一 帧及后一帧所述像素点的左右眼灰阶值组合不变时， 测量获得所述当前帧所 述像素点的其中一眼的最低亮度值或最大亮度值， 作为基准亮度值；
所述扫描行对应的灰阶对照表中，将所述当前帧左右目艮灰阶值组合中相 应眼的灰阶值替换成所述目标灰阶值后形成调整后的左右眼灰阶值组合， 测 量所述调整后的左右目艮灰阶值组合的最低亮度值或最大亮度值， 与所述对应 的基准亮度值偏差在 3%以内。
相应地， 本发明的另一方面， 提供一种用于降低快门式 3D液晶动态串 扰的装置， 包括：
接收单元， 用于接收当前帧左眼图像与右眼图像的数字信息； 比较单元， 用于比较当前帧每一扫描行中各像素点的左右目艮灰阶值组合 与上一帧相应位置的左右目艮灰阶值组合是否相同；
灰阶调整单元，用于将所述比较单元的比较结果为当前帧与上一帧左右 眼灰 P介值均不同的各个像素点的其中一眼图像的灰 P介值根据所述各像素点 所处扫描行对应的灰阶对照表进行调整，将当前帧其中一眼图像的所述各像 素点的灰阶值调整为与其对应的各目标灰阶值；
显示单元， 用于显示当前帧所有扫描行均经灰阶调整后的其中一眼图 像， 以及当前帧未经调整的另一眼图像。
优选地， 进一步包括：
灰阶对照表存储子单元， 用于存储所述每一扫描行对应的灰阶对照表， 所述灰阶对照表中每一当前帧左右眼灰阶值组合对应于一目标灰阶值， 所述 目标灰阶值包括左眼目标灰阶值或右眼目标灰阶值；
图像存储子单元， 用于存储上一帧左眼图像与右眼图像的数字信息。 优选地， 进一步包括：
緩存单元， 用于緩存其中一眼经灰阶调整后的图像， 以使所述经灰阶调 整后的图像与另一眼未经调整的图像按顺序显示。
优选地， 所述灰阶调整单元包括：
目标确定子单元， 用于根据比较结果为左右眼灰阶值均不同的各个像素 点的左右眼灰阶值组合，搜索所述灰阶对照表存储子单元中存储的所述各左 右眼图像像素点所在的扫描行所对应的灰阶对照表，找到与各左右眼灰阶值 相对应的各目标灰阶值；
调整子单元，用于将当前帧中所有与前一帧左右眼灰阶值组合的比较结 果均为不同的像素点处的左眼的灰 P介值调整到与其对应的各个左眼目标灰 P介值上， 或者将其右眼的灰阶值均调整到与其对应的各个右眼目标灰阶值 上。
优选地， 所述每一扫描行对应的灰阶对照表中的各目标灰阶值满足下述 条件：
在每一扫描行的某个像素点的各种当前帧左右眼灰 P介值组合，且其前一 帧及后一帧所述像素点的左右眼灰阶值组合不变时， 测量获得所述当前帧所 述像素点的其中一眼的最低亮度值或最大亮度值， 作为基准亮度值；
所述扫描行对应的灰阶对照表中，将所述当前帧左右目艮灰阶值组合中相 应的灰阶值替换成所述目标灰阶值后形成调整后的左右眼灰阶值组合， 测量 所述调整后的左右眼灰阶值组合的最低亮度值或最大亮度值， 与所述对应的 基准亮度值偏差在 3%以内。
相应地， 再一方面， 本发明的实施例提供了一种液晶显示器， 包括前述 任一项所述的用于降低快门式 3D液晶动态串扰的装置。
实施本发明实施例所提供的一种用于降低快门式 3D液晶动态串扰的方 法、 装置以及液晶显示器， 具有如下有益效果：
通过预先获得每一扫描行的灰阶对照表并将其存储在 3D 液晶显示器 中。 在 3D液晶显示器中接收到当前帧左右眼图像信号后， 比较当前帧每一 扫描行中各像素点的左右眼灰阶值组合与上一帧相应位置的左右眼灰阶值 组合是否相同， 如果均不同时， 则对相应像素点根据灰阶对照表进行调整， 即将当前帧其中一眼图像的所述各像素点的灰阶值调整为与其对应的各目 标灰阶值， 经过上述的调整可以降低或消除左右眼的串扰。
将本发明的装置及方法应用在低成本的整区背方闪烁的 3D液晶显示器 中， 可以达到扫描式背光相当程度的低左右眼串扰， 将本发明的装置及方法 应用在反应时间较慢的液晶中， 亦可以降低或消除左右眼串扰， 从而一定程 度上可以减少 3D液晶显示器消除或降低的左右眼串扰所花费的成本。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实 施例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面 描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1是本发明用于降低快门式 3D液晶动态串扰的装置的一个实施例的 结构示意图；
图 2是图 1中灰阶调整单元的结构示意图；
图 3是本发明用于降低快门式 3D液晶动态串扰的装置中灰阶对照表的 一个实施例的示意图；
图 4是本发明用于降低快门式 3D液晶动态串扰的装置中灰阶对照表的 另一个实施例的示意图；
图 5是本发明用于降低快门式 3D液晶动态串扰的方法的一个实施例的 流程示意图；
图 6是本发明一个实施例中未经灰阶调整的亮度 -时间曲线示意图； 图 7是本发明一个实施例中经灰阶调整后的亮度 -时间曲线示意图。 具体实施方式
下面参考附图对本发明的优选实施例进行描述。 如图 1所示， 是本发明用于降低快门式 3D液晶动态串扰的装置的一个 实施例的结构示意图； 本发明用于降低快门式 3D液晶动态串扰的装置设置 在快闪式 3D液晶显示器中， 具体地可设置在该快闪式 3D液晶显示器的原 始 3D信号输入端与其将 3D信号发送给液晶阵列显示的中间路径上， 本发 明具体可以通过采用一个处理芯片及周边电路来实现。 从图 1可以看出， 本 发明的装置包括：
接收单元 10,用于接收当前帧左眼图像与右眼图像的数字信息，所述接 收的数字信息包括当前帧的左眼图像中各像素点的原始灰阶值， 以及当前帧 的右眼图像中各像素点的原始灰 P介值；
比较单元 11 , 用于比较接收单元 10所接收的当前帧每一扫描行中各像 素点的左右眼灰阶值组合与上一帧相应位置的左右眼灰阶值组合是否相同； 具体地， 在每一个像素点位置上， 同时将当前帧中左眼图像的灰阶值与前一 帧中左眼图像的灰阶值进行比较， 以及将当前帧中右眼图像的灰阶值与前一 帧中右眼图像的灰阶值进行比较。
灰阶调整单元 12, 用于根据比较单元 11的比较结果， 将所述右眼图像 与左眼图像的每一扫描行的各对应像点的灰阶值进行调整， 具体地包括： 将所述比较单元 11 的比较结果为当前帧与前一帧左右眼灰阶值均不同 的各个像素点的其中一眼图像（左眼图像或右眼图像）的灰阶值根据该各像 素点所处位置的扫描行对应的灰阶对照表进行调整，将当前帧其中一眼图像 (左眼图像或右眼图像）的所述各像素点的灰阶值调整为与其对应的各目标 灰阶值；
緩存单元 14,用于緩存其中一眼经灰阶调整后的图像，并使之与另一眼 未经灰阶调整后的图像形成先后顺序， 可以理解的是， 在其他的实施例中， 也可以緩存其中未经灰阶调整的图像，使之与另一眼经灰阶调整后的图像形 成先后顺序。
显示单元 15,将当前帧所有扫描行均经灰阶调整后的其中一眼图像， 以 及当前帧未经调整的另一眼图像显示出来。
进一步包括存储单元 13,用于上述提到的灰阶对照表以及前一帧的图像 信息。 具体地， 包括： 灰阶对照表存储子单元 130, 用于存储所述每一扫描行对应的灰阶对照 表， 所述灰阶对照表中每一当前帧左右眼灰阶值组合对应于一目标灰阶值， 图像存储子单元 132,用于存储上一帧左眼图像与右眼图像的数字信息。 再请结合图 2所示， 其中， 灰阶调整单元 12包括：
目标确定子单元 120,用于根据比较单元 11中比较结果为左右眼灰阶值 均不同的各个像素点的左右眼灰阶值组合，搜索所述灰阶对照表存储子单元 130中存储的所述各左右眼图像像素点所在的扫描行所对应的灰阶对照表， 找到与各左右眼灰阶值相对应的各目标灰阶值；
调整子单元 122, 用于将当前帧中所有比较结果均为不同的像素点处的 左眼的灰阶值调整到与其对应的各个左眼目标灰阶值上， 或者将其右眼的灰 P介值均调整到与其对应的各个右眼目标灰阶值上。
其中， 对于灰阶对照表的举例可以参见图 4和图 5。
每一扫描行所对应的灰阶对照表均预先存储在存储单元 13 中。 在一个 实施例中， 不同扫描行所对应的灰阶对照表是单独的形式存储。 在另外的实 施例中， 可以将屏幕的扫描行划分成若干个区域（例如每 5个扫描行作为一 个区域）， 同一区域中的各扫描行可以采用相同的灰阶对照表。
参见图 3中所示， 本发明用于降低快门式 3D液晶动态串扰的装置中灰 P介对照表的一个实施例的示意图， 其示出了将当前帧的左眼灰阶值进行调整 的情形。 例如， 假设图 3为第一扫描行对应的灰阶对照表。 对于对应位置的 左眼图像和右眼图像的像素点 （例如均为第一行第 5像素点）， 若像素点的 左右眼灰阶值组合为 255/1 , 即其左眼图像该像素点的灰阶值为 255 ,右眼图 像该像素点的灰阶为 1 ; 例如其前一帧相应位置处的左右眼灰阶值组合为 200/30, 则可知， 该当前帧的该位置的左右眼灰阶值组合与前一帧的灰阶值 组合均不相同 （即左眼和右眼的灰阶值与前一帧的均不相同）， 则从该灰阶 对照表中找到当前帧灰阶值组合（255/1 )其对应的左眼目标灰阶值为 249, 即需要将左眼图像的该像素点的灰阶值从 255调整到 249, 左右眼图像的像 照表中查到。该扫描行的其他位置的像素点只要其左右眼灰阶值组合与前一 帧的左右眼灰阶值组合均不相同也可采用该目标灰阶对照表进行调整。
其中， 每一扫描行对应的灰阶对照表中的各目标灰阶值满足下述条件： 在每一扫描行的某个像素点的各种当前帧左右眼灰阶值组合，且其前一 帧及后一帧所述像素点的左右眼灰阶值组合不变时， 测量获得所述当前帧所 述像素点的其中一眼的最低亮度值或最大亮度值， 作为基准亮度值；
所述扫描行对应的灰阶对照表中，将所述当前帧左右眼灰阶值组合中一 眼的灰阶值替换成所述目标灰阶值后形成调整后的左右眼灰阶值组合， 测量 所述调整后的左右眼灰阶值组合的最低亮度值或最大亮度值， 与所述对应的 基准亮度值偏差在 3%以内。
如图 4所示， 是本发明用于降低快门式 3D液晶动态串扰的装置中灰阶 对照表的另一个实施例的示意图， 其示出了将当前帧的右眼灰阶值进行调整 的情形；
例如， 假设图 4为第一扫描行对应的灰阶对照表。 对于对应位置的左眼 图像和右眼图像的像素点 （例如均为第一行第 5像素点）， 若像素点的左右 眼灰阶值组合为 255/1 , 即其左眼图像该像素点的灰阶值为 255 ,右眼图像该 像素点的灰阶为 1 ;例如其前一帧相应位置处的左右目艮灰阶值组合为 200/30, 则可知， 该当前帧的该位置的左右眼灰阶值组合与前一帧的灰阶值组合均不 相同 （即左眼和右眼的灰阶值与前一帧的均不相同）， 则从该灰阶对照表中 找到当前帧灰阶值组合（255/1 )其对应的右眼目标灰阶值为 22, 即需要将 右眼图像的该像素点的灰阶值从 1调整到 22,左右眼图像的像素点相应具有 扫描行的其他位置的像素点只要其左右眼灰阶值组合与前一帧的左右眼灰 P介值组合均不相同也可采用该目标灰阶对照表进行调整。
在图 4中所述每一扫描行对应的灰阶对照表中的各目标灰阶值所需要满 足的条件与图 3中相同， 在此不进行详述。
可以理解的是，上述实施例中以灰阶对照表的形式来存储每一扫描行的 各位置左右眼灰阶值组合中某一眼（左眼或右眼）灰阶值需要调整的信息， 当然以其他形式（例如——映射方式）也可以用来存储这些信息， 理应在本 发明所保护的范围之内。 如图 5所示， 是本发明用于降低快门式 3D液晶动态串扰的方法的一个 实施例的流程示意图。 其包括如下流程：
步骤 S50: 接收当前帧左眼图像与右眼图像的数字信息， 该接收的当前 帧左眼图像与右眼图像的数字信息包括当前帧的左眼图像中各像素点的原 始灰 P介值 , 以及当前帧的右眼图像中各像素点的原始灰 P介值；
步骤 S51 : 比较当前帧当前扫描行中各像素点的左右眼灰阶值组合与上 一帧相应位置的左右目艮灰阶值组合是否相同， 具体地， 在每一个像素点位置 上， 同时将当前帧中左眼图像的灰阶值与前一帧中左眼图像的灰阶值进行比 较， 以及将当前帧中右眼图像的灰阶值与前一帧中右眼图像的灰阶值进行比 较。
如果步骤 S51中比较到结果为当前帧与前一帧左右眼灰阶值均不相同， 则流程转至步骤 S52;如果步骤 S51中比较到结果为有一眼的灰阶值相同同， 则流程转至步骤 S55; 直至将当前扫描行中所有的像素点比较结束；
步骤 S52, 将在步骤 S51中比较结果为当前帧与前一帧左右眼灰阶值均 不相同的各个像素点的其中一眼图像（左眼图像或右眼图像）的灰阶值根据 该各像素点所处位置的扫描行对应的灰阶对照表进行调整，将当前帧其中一 眼图像（左眼图像或右眼图像）的所述各像素点的灰阶值调整为与其对应的 各目标灰阶值； 其中， 每一扫描行的灰阶对照表均被预先定义， 所述灰阶对 照表中每一当前帧左右眼灰阶值组合对应于一个目标灰阶值， 所述目标灰阶 值包括左眼目标灰阶值或右眼目标灰阶值。
具体地， 在该步骤中， 根据比较结果均为不同的各像素点的位置， 搜索 预先存储的所述像素点所处的扫描行对应的灰阶对照表，找到与各像素点当 前帧左右眼灰阶值组合相对应的各目标灰阶值；
将所有比较结果均为不同的像素点处的其中一眼图像的灰 P介值调整到 与其对应的各个目标灰阶值上， 例如， 将各位置的左眼的灰阶值调整到与其 对应的各个左眼目标灰阶值上， 或将其右眼的灰阶值均调整到与其对应的各 个右眼目标灰阶值上。
步骤 S53 , 当对当前帧当前扫描行的某一眼中的像素点的灰阶调整结束 后， 进一步判断当前帧中该眼中所有扫描行的像素点的灰阶值是否已调整完 毕？
如果判断结果为未调整完毕， 则在步骤 S54中， 将下一扫描行置为当前 扫描行， 并将流程转向步骤 S51 , 对下一扫描行中的左右眼图像的各像素的 灰阶值进行调整；
如果判断结果为已全部调整完毕， 则在步骤 S55中， 将当前帧所有扫描 行均经灰阶调整后的其中一眼图像， 以及当前帧未经调整的另一眼图像显示 出来。
进一步的， 在本发明的一个实施例中， 在步骤 S55中进一步包括： 緩存 其中一眼（例如， 经灰阶调整后的图像）， 并与另一眼图像（例如， 未经灰 P介调整的图像）， 以使该两眼图像可以按顺序传送出去并显示。
其中， 其中， 每一扫描行对应的灰阶对照表中的各目标灰阶值满足下述 条件：
在每一扫描行的某个像素点的各种当前帧左右眼灰阶值组合 ,且其前一 帧及后一帧所述像素点的左右眼灰阶值组合不变时， 测量获得所述当前帧所 述像素点的其中一眼的最低亮度值或最大亮度值， 作为基准亮度值；
所述扫描行对应的灰阶对照表中，将所述当前帧左右眼灰阶值组合中一 眼的灰阶值替换成所述目标灰阶值后形成调整后的左右眼灰阶值组合， 测量 所述调整后的左右眼灰阶值组合的最低亮度值或最大亮度值， 与所述对应的 基准亮度值偏差在 3%以内。
下面将结合图 6和图 7, 以一个筒单实例对本发明中如何产生每一扫描 行对应的灰阶对照表， 以及每一扫描行对应的灰阶对照表的原理进行进一步 的说明。
如图 6所示， 是本发明一个实施例中未经灰阶调整的亮度 -时间曲线示 意图。从中可以看出，在该实施例中，假设以第一扫描行第一个像素点为例， 其连续四帧（从 N-1帧到 N+1帧）的左右目艮灰阶组合分别为 220/220、 100/200、 100/200、 100/200。 图 6即为通过一个光感测器进行量测获得的此四帧处的 亮度 -时间曲线。 从中， 可以看出， 由于在第 N帧， 其左右眼灰阶值组合与 前一帧（第 N-1帧）的左右眼灰阶值组合均不相同， 在一个采用单区闪烁式 的 LED背光的 3D液晶显示器中， 由于液晶反应的时间不足， 这种现象即会 造成左右眼动态的串扰的现象， 理想状态， 左右眼灰阶值组合从 220/220变 换到 100/200时， 经过稳定后， 其亮度应在 f ( 29% )与 h ( 77% )之间， 我 们把 f与 h分别称为最小基准亮度值与最大基准亮度值。
但是当前帧实际测量出来的亮度值却处于 e ( 38% )和 g ( 87% )之间。 故这种左右眼灰阶值组合同时变化的情形， 会使在 3D液晶显示器中显示出 来的亮度值与其基准亮度值之间存在偏差，从而导致左右眼动态串扰现象的 出现。 故需要想办法使当前帧（第 N帧）该像素点显示亮度值调整为达到或 接其基准亮度值。
通常 , 我们在每一扫描行的某个像素点的各种当前帧左右眼灰阶值组 合， 且其前一帧及后一帧所述像素点的左右眼灰阶值组合不变时， 测量获得 所述当前帧所述像素点的其中一眼的最低亮度值或最大亮度值，作为基准亮 度值；
如图 7 所示， 是本发明一个实施例中经过灰阶调整的亮度 -时间曲线示 意图。 从中可以看出， 经调整后， 使当前帧（第 N帧）该像素点显示的亮度 的最大值（g )和最小值（e ) 变成了分别和 f与 h相同。 这种调整是通过改 变当前帧的左目艮灰阶值来达成的， 从图中可以看出， 此时当前帧的左眼灰阶 值从原来的 100调整为了 70。这就建立了一个对应关系， 即将当前左右目艮灰 阶组合为 100/200中的左眼灰阶调整为 70, 即可以使当前帧的亮度符合其预 期的基准亮度值（或曲线）。 从而将左右眼灰阶值组合 100/200, 与左眼灰阶 值调整为目标灰阶值 70作为一个对应关系。
基于此原理， 通过量测， 可以将获得该扫描行中其他左右眼灰阶值组合 所对应的目标灰阶值，从而形成例如图 3所示的该扫描行所对应的灰阶对照 表。 每一扫描行对应的灰阶对照表完成后， 将其存储在 3D液晶显示器的存 储器中。
同理， 也可以对右眼进行调整， 此时通过量测即可以找出每一左右目艮灰 阶组合对应的右眼目标灰阶值， 从而形成与图 4中所示的灰阶对照表， 其原 理与形成图 3所示的灰阶对照表的原理相同， 在此不进行详述。
在其他的实施例中， 对于该目标灰阶值的选择， 可以而无需完全调整到 预期的最大值 ( h ) 与最小值（f ), 例如可以将调整后的灰阶值组合所显示 的亮度与其基准亮度值存在小范围的差异（如 3% )也可基本实现本发明的 目的， 即符合：
(调整后的最小亮度 -最小基准亮度值） /最小 /基准亮度值） *100%<3% 或
(调整后的最最大亮度 -最大基准亮度值） /最大基准亮度值 ) *100%<3% 故， 当前扫描行处的灰阶对照表不是唯一的， 但如果该灰阶对照表已被 存储， 则在附图 5中的对二维静态信号进行调整时即调用该已存储的灰阶对 照表进行。
根据上述原理， 当某个像素点的当前帧左右眼灰阶值组合与前一帧相应 位置的左右眼灰阶值组合均不相同时，可以将当前帧的某一眼（左眼或右眼） 灰阶值调整到一个预先确认的目标灰阶值，从而使当前帧该像素点处所显示 的亮度达到或接近其基准亮度值。 从而消除或降低此时的左右眼动态串扰。
相应地， 本发明还提供了一种快闪式 3D液晶显示器， 其包括上述图 1 至图 2所描述的用于降低快门式 3D液晶动态串扰的装置， 其实现原理可以 结合上述图 1至图 7的描述， 所有细节均结合上述对图 1至图 7的描述， 在 此不进行赘述。
实施本发明， 通过预先获得每一扫描行的灰阶对照表并将其存储在 3D 液晶显示器中。 在 3D液晶显示器中接收到当前帧左右眼图像信号后， 比较 当前帧每一扫描行中各像素点的左右眼灰阶值组合与上一帧相应位置的左 右眼灰阶值组合是否相同， 如果均不同时， 则对相应像素点根据灰阶对照表 进行调整， 即将当前帧其中一眼图像的所述各像素点的灰阶值调整为与其对 应的各目标灰阶值， 经过上述的调整可以降低或消除左右眼的串扰。
将本发明的装置及方法应用在低成本的整区背方闪烁的 3D液晶显示器 中， 可以达到扫描式背光相当程度的低左右眼串扰， 将本发明的装置及方法 应用在反应时间较慢的液晶中， 亦可以降低或消除左右眼串扰， 从而一定程 度上可以减少 3D液晶显示器消除或降低的左右眼串扰所花费的成本。
以上所揭露的仅为本发明较佳实施例而已， 当然不能以此来限定本发明 之权利范围， 因此等同变化， 仍属本发明所涵盖的范围。

Claims

权 利 要 求
1、 一种用于降低快门式 3D液晶动态串扰的方法， 其特征在于， 包括： 接收当前帧左眼图像与右眼图像的数字信息；
比较当前帧每一扫描行中各像素点的左右眼灰阶值组合与上一帧相应 位置的左右眼灰阶值组合是否相同；
将比较结果为当前帧与上一帧左右眼灰 P介值均不同的当前帧各个像素 点的其中一眼图像的灰阶值，根据所述各像素点所处扫描行对应的灰阶对照 表进行调整，将当前帧其中一眼图像的所述各像素点的灰 P介值调整为与其对 应的各目标灰阶值；
显示当前帧中所有扫描行均经灰阶调整后的其中一眼图像以及当前帧 中未经调整的另一眼图像。
2、如权利要求 1所述的用于降低快门式 3D液晶动态串扰的方法，其特 征在于，
所述每一扫描行的灰阶对照表均被预先定义， 所述灰阶对照表中每一当 前帧左右眼灰阶值组合对应于一个目标灰阶值， 所述目标灰阶值包括左眼目 标灰阶值或右眼目标灰阶值。
3、如权利要求 1所述的用于降低快门式 3D液晶动态串扰的方法，其特 征在于， 所述显示当前帧所有扫描行均经灰阶调整后的其中一眼图像以及当 前帧未经调整另一眼图像步骤， 进一步包括：
緩存其中一眼经灰阶调整后的图像， 以使所述经灰阶调整后的图像与另 一眼未经调整的图像按顺序显示。
4、如权利要求 2所述的用于降低快门式 3D液晶动态串扰的方法，其特 征在于， 所述将比较结果为当前帧与上一帧左右眼灰阶值均不同的当前帧各 个像素点的其中一眼图像的灰阶值，根据所述各像素点所处扫描行对应的灰 P介对照表进行调整，将当前帧其中一眼图像的所述各像素点的灰阶值调整为 与其对应的各目标灰阶值的步骤具体为：
根据比较结果均为不同的各像素点的位置，搜索预先存储的所述像素点 所处的扫描行对应的灰阶对照表，找到与各像素点当前帧左右眼灰阶值组合 相对应的各目标灰阶值；
将当前帧中所有与前一帧左右眼灰 P介值比较结果均为不同的像素点处 的左眼的灰阶值调整到与其对应的各个左眼目标灰阶值上， 或者将其右眼的 灰阶值均调整到与其对应的各个右眼目标灰阶值上。
5、如权利要求 4所述的用于降低快门式 3D液晶动态串扰的方法，其特 征在于， 每一扫描行对应的灰阶对照表中的各目标灰阶值满足下述条件： 在每一扫描行的某个像素点的各种当前帧左右眼灰阶值组合 ,且其前一 帧及后一帧所述像素点的左右眼灰阶值组合不变时， 测量获得所述当前帧所 述像素点的其中一眼的最低亮度值或最大亮度值， 作为基准亮度值；
所述扫描行对应的灰阶对照表中，将所述当前帧左右目艮灰阶值组合中相 应眼的灰阶值替换成所述目标灰阶值后形成调整后的左右眼灰阶值组合， 测 量所述调整后的左右目艮灰阶值组合的最低亮度值或最大亮度值， 与所述对应 的基准亮度值偏差在 3%以内。
6、 一种用于降低快门式 3D液晶动态串扰的装置， 其特征在于， 包括： 接收单元， 用于接收当前帧左眼图像与右眼图像的数字信息；
比较单元， 用于比较当前帧每一扫描行中各像素点的左右眼灰阶值组合 与上一帧相应位置的左右目艮灰阶值组合是否相同；
灰阶调整单元，用于将所述比较单元的比较结果为当前帧与上一帧左右 眼灰阶值均不同的当前帧各个像素点的其中一眼图像的灰阶值，根据所述各 像素点所处扫描行对应的灰阶对照表进行调整，将当前帧其中一眼图像的所 述各像素点的灰阶值调整为与其对应的各目标灰阶值；
显示单元， 用于显示当前帧中所有扫描行均经灰阶调整后的其中一眼图 像以及当前帧中未经调整的另一眼图像。
7、如权利要求 6所述的用于降低快门式 3D液晶动态串扰的装置，其特 征在于， 进一步包括：
灰阶对照表存储子单元， 用于存储所述每一扫描行对应的灰阶对照表， 所述灰阶对照表中每一当前帧左右眼灰阶值组合对应于一目标灰阶值， 所述 目标灰阶值包括左眼目标灰阶值或右眼目标灰阶值；
图像存储子单元， 用于存储上一帧左眼图像与右眼图像的数字信息。
8、如权利要求 7所述的用于降低快门式 3D液晶动态串扰的装置，其特 征在于， 进一步包括：
緩存单元， 用于緩存其中一眼经灰阶调整后的图像， 以使所述经灰阶调 整后的图像与另一眼未经调整的图像按顺序显示。
9、如权利要求 7所述的用于降低快门式 3D液晶动态串扰的装置，其特 征在于， 所述灰阶调整单元包括：
目标确定子单元， 用于根据比较结果为左右眼灰阶值均不同的各个像素 点的左右眼灰阶值组合，搜索所述灰阶对照表存储子单元中存储的所述各左 右眼图像像素点所在的扫描行所对应的灰阶对照表，找到与各左右眼灰阶值 相对应的各目标灰阶值；
调整子单元，用于将当前帧中所有与前一帧左右眼灰阶值组合的比较结 果均为不同的像素点处的左眼的灰 P介值调整到与其对应的各个左眼目标灰 P介值上， 或者将其右眼的灰阶值均调整到与其对应的各个右眼目标灰阶值 上。
10、 如权利要求 9任一项所述的用于降低快门式 3D液晶动态串扰的装 置， 其特征在于， 所述每一扫描行对应的灰阶对照表中的各目标灰阶值满足 下述条件：
在每一扫描行的某个像素点的各种当前帧左右眼灰阶值组合 ,且其前一 帧及后一帧所述像素点的左右眼灰阶值组合不变时， 测量获得所述当前帧所 述像素点的其中一眼的最低亮度值或最大亮度值， 作为基准亮度值；
所述扫描行对应的灰阶对照表中，将所述当前帧左右目艮灰阶值组合中相 应眼的灰阶值替换成所述目标灰阶值后形成调整后的左右眼灰阶值组合， 测 量所述调整后的左右目艮灰阶值组合的最低亮度值或最大亮度值， 与所述对应 的基准亮度值偏差在 3%以内。
11、 一种液晶显示器， 其特征在于， 包括如权利要求 6至 10任一项所 述的用于降低快门式 3D液晶动态串扰的装置。
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