WO2014048125A1 - 3d液晶显示装置的驱动方法、驱动系统和一种3d眼镜 - Google Patents

3d液晶显示装置的驱动方法、驱动系统和一种3d眼镜 Download PDF

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Publication number
WO2014048125A1
WO2014048125A1 PCT/CN2013/076323 CN2013076323W WO2014048125A1 WO 2014048125 A1 WO2014048125 A1 WO 2014048125A1 CN 2013076323 W CN2013076323 W CN 2013076323W WO 2014048125 A1 WO2014048125 A1 WO 2014048125A1
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Prior art keywords
frequency
liquid crystal
driving
crystal display
display device
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PCT/CN2013/076323
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English (en)
French (fr)
Inventor
陈胤宏
陈宥烨
廖良展
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/982,490 priority Critical patent/US9019254B2/en
Priority to CN201380000300.3A priority patent/CN103403788B/zh
Publication of WO2014048125A1 publication Critical patent/WO2014048125A1/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
    • G09G3/20—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
    • 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
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0248—Precharge or discharge of column electrodes before or after applying exact column voltages
    • 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
    • G09G2320/0252—Improving the response speed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0435—Change or adaptation of the frame rate of the video stream

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a driving method, a driving system and a 3D glasses of a 3D liquid crystal display device.
  • Liquid crystal display devices are popular among consumers because of their low energy consumption and small size.
  • Existing 3D shutter panels usually use 100Hz or 120Hz screen update rate, corresponding to 3Hz mirrors, respectively, 50Hz or 60Hz switching frequency, but the actual user will also be 50Hz or 60Hz fluctuations due to ambient light. Under the influence of the superposition of ambient light, the user has a strong sense of flicker (as shown in Fig. 1 is a schematic diagram of a monocular 60 Hz 3D display panel superimposed with 60 Hz ambient light).
  • the technical problem to be solved by the present invention is to provide a driving method, a driving system and a 3D glasses for a 3D liquid crystal display device which reduces crosstalk.
  • a driving method of a 3D liquid crystal display device comprising the step of driving a panel using a target frequency of (monocular frequency X 2 ), the monocular frequency being 62 to 118 Hz.
  • the driving method further includes a frequency adjustment step of: adjusting an update frequency of the input picture to a target frequency. It can be applied to input screens with different update frequency, which improves the application range of the product.
  • the input screen directly received by the display driving module of the liquid crystal display device has a single-eye frequency of 62 to 118 Hz, and directly drives the panel.
  • the display driving module (such as the timing driving circuit) does not need to perform frequency conversion on the input signal, thereby improving the response speed of the display driving module.
  • the single eye frequency is 62 Hz-72 Hz. Under the existing conditions, if the number of LVDS is not increased, the supported conversion picture update rate is up to about 72*2 Hz, so the frame rate control In the interval of (62Hz-72Hz) ⁇ 2, no additional hardware cost can be added without reducing crosstalk. Further, the single eye frequency is 65 ⁇ .
  • the target frequency is preferably 65 Hz, because the two frequency systems commonly used in the prior art are 50 Hz and 60 Hz, 50 Hz only needs to compensate 1 frame every 3 frames, and 60 Hz only needs 1 frame after every 11 frames.
  • the picture, 65 Hz can be rounded at a small interval. To match the two mainstream formats, fewer pictures need to be inserted. Only one picture compensation mode is used, and the design is simple. Moreover, the experimental data shows that when the target frequency is selected at 65 Hz, better visual effects can be achieved and the user's flickering feeling can be reduced.
  • a driving system for a 3D liquid crystal display device includes a display driving module that drives a panel using a target frequency of (monocular frequency X 2 ), wherein the monocular frequency is 62 to 118 ⁇ .
  • the single eye frequency is 65 ⁇ .
  • the target frequency is preferably 65 Hz, because the two frequency systems commonly used in the prior art are 50 Hz and 60 Hz, 50 Hz only needs to compensate 1 frame every 3 frames, and 60 Hz only needs 1 frame after every 11 frames.
  • the picture, 65 Hz can be rounded at a small interval. To match the two mainstream formats, fewer pictures need to be inserted. Only one picture compensation mode is used, and the design is simple.
  • the experimental data shows that when the target frequency is selected at 65 Hz, better visual effects can be achieved and the user's flickering feeling can be reduced.
  • the input screen received by the display driving module has a single-eye frequency of 62 - 118HZ, and directly drives the panel.
  • the display driving module (such as the timing driving circuit) does not need to perform frequency conversion on the input signal, thereby improving the response speed of the display driving module.
  • the driving module further includes a converting unit that adjusts an update frequency of the input screen to a target frequency.
  • the conversion unit can convert the input screens with different update frequencies into the target frequency, which improves the application range of the product.
  • a 3D glasses for use in a driving system of the 3D liquid crystal display device of the present invention the switching frequency of the 3D eyeglasses being equal to a monocular frequency of a panel of the 3D liquid crystal display device.
  • the output of the panel is 124 ⁇ 236 Hz at this update rate, and the switching frequency of the corresponding 3D glasses is 62 ⁇ 118HZ.
  • This avoids the common ambient light of 50HZ (mains frequency in mainland China) and 60HZ (mains frequency in Taiwan).
  • the update frequency of the input screen exceeds 62HZ, the crosstalk of ambient light is significantly reduced, so that the flickering effect caused by ambient light can be effectively improved.
  • the screen update rate can be unlimited, but considering the liquid crystal panel For the required charging time, it is appropriate to adjust the monocular frequency of the panel to 62Hz-118Hz.
  • 1 is a waveform diagram of a combination of a switching frequency of a 3D glasses and ambient light fluctuations
  • FIG. 2 is a schematic diagram of a driving method of the 3D liquid crystal display device of the present invention.
  • FIG. 3 is a schematic diagram of a driving method of a 3D liquid crystal display device using only one overvoltage driving table of the present invention
  • FIG. 4 is a schematic view showing the configuration of a driving system of a 3D liquid crystal display device using only one overvoltage driving table of the present invention
  • FIG. 5 is a schematic diagram of a source image signal conversion and system structure according to Embodiment 1 of the present invention
  • FIG. 6 is a schematic diagram of a left eye source image signal conversion according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of image conversion of a right eye source image according to an embodiment of the present invention.
  • Figure 9 is a comparison of visual perception of signals of different frequencies
  • Figure 10 is a block diagram showing the structure of a driving system of a 3D liquid crystal display device according to a third embodiment of the present invention.
  • 10 display driver module; 20, conversion unit; 30, and overvoltage drive module. 21. Buffer processing module; 22. Compensation module.
  • a driving method of a 3D liquid crystal display device comprising the step of driving a panel using a target frequency of (monocular frequency X 2 ), the monocular frequency being 62 to 118 Hz.
  • the applicable range of the product is improved. For example, if the update frequency of the input screen is not within the range of the target frequency, the update frequency of the input screen is adjusted to the target frequency.
  • the display driving module of the liquid crystal display device directly receives the target frequency to drive the panel, so that the display driving module (such as the timing driving circuit and the like) does not need to perform frequency conversion on the input signal, thereby improving the response speed of the display driving module.
  • the monocular frequency may further preferably be 62 ⁇ to 72 ⁇ .
  • the interval of 2 can be used without reducing the additional hardware cost under the premise of reducing crosstalk.
  • the output of the panel is 124 ⁇ 236 ⁇ at this update rate, and the switching frequency of the corresponding 3D glasses is 62 ⁇ 118 ⁇ .
  • the update frequency of the input screen exceeds 62 , the crosstalk of ambient light is significantly reduced. It can effectively improve the flickering effect caused by ambient light.
  • it is suitable to adjust the monocular frequency of the panel to 62 Hz - 118 Hz.
  • the monocular frequency of 65hz as an example: as shown in Fig. 9, the monocular frequency of 50hz, 60hz and 65hz and the human eye perception frequency after 60hz ambient light superposition are simulated by mathematical model, which will pass 3D eyes at different frequencies.
  • the panel screen light + ambient light superimposed signal is subjected to Fourier transform, and is compared with the human flicker perception.
  • the 65hz monocular frequency panel is less affected by the ambient light of 60hz. After superimposing with the ambient light, the first lower-order peak is not only at the frequency position relative to the superimposed 60hz and 50hz.
  • the monocular frequency panel is higher, and the peak value of its distributed output value is lower; while more frequency distribution is removed to other higher-order peaks, corresponding to the human eye flicker perception curve, when When the target frequency is selected at 65 Hz, better visual effects can be achieved and the user's flickering is reduced.
  • the 62hz monocular frequency panel is also affected by 60hz ambient light compared to the 60hz panel, but its effect is slightly weaker than the 65hz monocular frequency panel.
  • the data of the display screen is transmitted by LVDS, and the maximum speed of one channel LVDS is 80MHz.
  • the number of LVDS groups is not increased under the consideration cost.
  • the limit of the IC can be about 86MHz, and the frequency of driving the LCD panel can be up to (62 ⁇ -72 ⁇ ) ⁇ 2.
  • the interface of the LCD panel's timing control chip to the display driver chip is mini-LVDS.
  • the frequency conversion is four times that of LVDS, and the limit of one group is 345MHz. Therefore, simply consider the LVDS frequency limit.
  • the frequency adjustment step of the embodiment includes: A. when the format of the received source image signal is different from the preset target frequency, frequency conversion of the received source image signal is performed, and The display frequency is converted to the target frequency to generate a target image signal; B.
  • the overvoltage driving table is matched with the target frequency of the target image signal for overvoltage driving output.
  • an overvoltage drive is used to accelerate the reaction speed of the liquid crystal.
  • the amount of extra voltage applied is determined by the previous image state and the current image state. That is, the amount of voltage of the overvoltage driving is determined based on the last pixel in the image of the previous frame and the first pixel of the image of the current frame. Since the gray scales of different screens are different, the voltage values required for overvoltage driving are also different. Therefore, an overvoltage driving table needs to be set in the liquid crystal display device to conform to the corresponding overvoltage output, and the desired screen gray scale is obtained.
  • the invention also discloses a driving system of a 3D liquid crystal display device: the driving system of the 3D liquid crystal display device comprises a display driving module for driving the panel with a target frequency of (monocular frequency X 2 ) 10, single eye frequency is 62 ⁇ 118HZ.
  • the update frequency of the input signal of the display drive module 10 is equal to the target frequency.
  • the display driving module 10 (such as a timing driving circuit, etc.) does not need to perform frequency conversion on the input signal, thereby improving the response speed of the display driving module 10.
  • the driving module may further include a conversion unit that adjusts the update frequency of the input picture to the target frequency.
  • the present invention also discloses a 3D view mirror of the drive system of the 3D liquid crystal display device of the present invention, the switching frequency of the 3D eye lens being equal to the single eye frequency, i.e., half of the target frequency of the panel.
  • a conversion unit 20 for adjusting the update frequency of the input picture to (62 ⁇ 118HZ) 2 is included. It is also possible to couple the overvoltage drive module 30 behind the conversion unit 20, which uses only a set of overvoltage drive meters for use with the target frequency.
  • the technical solution converts a source image signal having a different frequency from a target frequency into an image signal having a target frequency, so that the liquid crystal display device only needs to use a set of overvoltage driving tables to display images for different frequencies without This results in a poor grayscale brightness curve, which saves a lot of memory and saves costs.
  • the left and right eye image signals of different frequencies can share a set of overvoltage driving tables by converting to the target frequency, thereby reducing flickering and crosstalk.
  • 2D display it can adapt to other frequency image input and make the display achieve better display.
  • step A if the frequency of the source image signal is less than the target frequency, the step is further performed: S1: by generating a new frame picture and inserting into the source image signal so that the frequency of the image signal is the same as the target frequency.
  • step A if the frequency of the source image signal is greater than the target frequency, the steps are further performed: S2: Select a partial picture from the source image signal, and discard the selected partial picture.
  • the present invention is further described by way of an embodiment of a driving system of a specific 3D liquid crystal display device.
  • the driving system of the liquid crystal display device includes: a conversion unit 20 and an overvoltage drive Module 30.
  • the conversion unit 20 includes: a buffer processing module 21 and a compensation module 22.
  • the buffer processing module 21 is provided with: a buffer controller of two screens, a buffer memory connected to the buffer controller, and a fixed frequency clock;
  • the compensation module 22 includes: a compensator, a static buffer Flash memory, buffer, X frame picture counter, and data output port.
  • the left-eye source image signal data of the 60-Hz 3D shutter display device is converted into a target image signal having a target frequency of 65 Hz, and the left-eye data is buffered into the two screens of the buffer processing module 21.
  • the control area uses the fixed frequency clock to simultaneously detect and store the Nth picture and the N+1th picture in the buffer memory. Then, the Nth picture and the N+1th picture are simultaneously input into the compensator and the buffer in the compensation module 22, and the compensation picture X is generated in the compensation module 22 and stored in the static buffer memory, the buffer.
  • the internal picture is output normally.
  • the X frame picture counter is used to control the data output port to control the compensation picture to be output at the appropriate timing (ie, inserting the source image signal at the appropriate timing (ie, the calculated timing of inserting the compensation picture X).
  • the compensation screen X is inserted between the Nth frame and the N+1th screen and simultaneously outputted.
  • the output frame images are stored in the picture memory by the overvoltage driving module 10 and outputted by comparison with the overvoltage driving table. Control.
  • the above is an example of entering the overvoltage driving output after processing the image signal of the left eye source image of 60 Hz in the present embodiment, and the compensation method is the same if the right eye signal of 50 Hz is used.
  • the frequency of the left and right eye signals is not limited to the numerical values given in the embodiment.
  • the new frame picture inserted into the source image signal that is, the compensation picture X is all black, or all white, or the calculated motion detection compensation picture, or the previous frame picture, or the next frame. Picture. If the number of pictures to be inserted is small, the black, all white or the previous frame or the next frame of the single can be selected. If the number of insertions is large, the motion detection compensation screen generated by the calculation can be selected. So that there is a better display.
  • the number of insertion compensation pictures X is selected according to the difference between the frequency of the source image signal and the target frequency, and the insertion timing may be an average insertion, a random insertion, or insertion at a specific point.
  • the source image signal of 60 Hz in the left eye is to be converted into a target frequency of 65 Hz. It is necessary to insert a 5-frame compensation picture X.
  • This embodiment adopts a new one in a frequency cycle. The frame picture is averaged into the inter-frame mode of the source image signal, that is, a compensation picture X is inserted after every 11 frames. As shown in Fig.
  • the source image signal of 50 Hz in the right eye is converted into a target frequency of 65 Hz, and 15 frames are inserted. Therefore, every 10 frames, a compensation picture X is inserted after every 3 frames.
  • the average insertion method makes the screen display more smooth.
  • the compensated motion curve produces some small jitter, but it is not obvious under 3D viewing. Since this embodiment selects the signals of the two commonly used frequency systems, respectively, 50 Hz and 60 Hz, and 50 and 60 are exactly 5 common divisors, in order to better match the average insertion of the compensated picture, the target frequency is the most Good is also a common divisor of 5, and 65 Hz chosen in this embodiment is exactly the common divisor of 5.
  • the target frequency can also be selected to be 55 Hz, but two modes are needed to change the source image signal to the target frequency, that is, one mode is the compensated picture mode, and the other mode is to discard the picture mode, which increases the design difficulty. And cost. At 65 Hz, it can be rounded at a small interval, and only the compensation picture mode can be used, and there are fewer pictures to be inserted in order to match the two mainstream systems.
  • the update frequency of the input screen is adjusted to (62 - 118HZ) 2
  • the update rate of the original single-eye input screen is converted to fixed by 50 ⁇ per second or 60 ⁇ per second by simple animation detection and compensation.
  • the update frequency of the input screen exceeds 60 , the crosstalk of ambient light is significantly reduced. Can it be effective?
  • the flickering effect brought by Wenshan ambient light can be adjusted only by modifying the output timing of the liquid crystal panel. It is not necessary to adjust other circuits of the liquid crystal panel, and the upgrade is convenient, and the difficulty of rectification is small, which is conducive to saving production and transformation costs. It is reasonable to say that there is no upper limit to the screen update rate, but considering the charging time required for the LCD panel, and because the 3D display, one frame is displayed in two frames of the left eye and the right eye, the update frequency of the input screen is adjusted to 62 Hz- 118Hz is more suitable.
  • the compensation frame frame is made to reach the target frequency corresponding to the overvoltage driving module 30 in the source image signal, so that the overvoltage driving module 30 can correctly perform overvoltage driving.
  • the choice of the target frequency should be greater than 45 Hz, so that the human eye can not perceive the flicker, of course, the best More than 60 Hz, so that the human eye has a better effect when viewed.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the difference from the first embodiment is that the left-eye source image signal is 60 frames and the target frequency is 55 Hz. Therefore, the source image signal is processed by discarding 5 frames, thereby making it and the target frequency. Consistent. At this time, the 5 frames of the source image signal are removed by the compensation module.
  • the removal mode is also performed by averaging from 60 frames of the original image signal in one frequency cycle, that is, according to The time axis displayed on the screen is extracted from each frame by an average of several frames.
  • the processing of the right eye signal is also the same, that is, the corresponding frame picture can be added or subtracted.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the source image signal system and the frequency of the target image signal in the first embodiment and the second embodiment are both determined, so that it is not necessary to judge the signal.
  • the image signal judging module is added to implement an overvoltage driving table for driving output for different source image signals.
  • the driving system of the liquid crystal display device includes: a judging module 10, a converting unit 20, and an overvoltage driving module 30.
  • the driving process can be expressed as follows:
  • A determining whether the received source image signal system needs to perform frequency conversion, and if so, converting the display frequency to the target frequency to generate a target image signal; if not, the source image signal is the target image signal;
  • An overvoltage driving output is performed using an overvoltage driving table that matches the target frequency of the target image signal.
  • the invention improves the target frequency and balances the display effect by the form of the interpolation picture.
  • other frequency values may also be used, and the specific analysis is as follows:
  • 50 Hz and 60 Hz are obtained by "factor decomposition":
  • the common factor is 2, 5, so as long as the screen update rate with the common factor can be generated by interpolation screen, for example: 62Hz, 64Hz, 65Hz, 66Hz, 68Hz, 70Hz, 72Hz.
  • 70' 10: The corresponding input 50Hz, every 5 ⁇ unique unit, need to insert two frames to achieve 70Hz.
  • the frequency adjustment step is not required, and the panel is directly driven.

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
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  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal Display Device Control (AREA)
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Abstract

一种3D液晶显示装置的驱动方法、驱动系统和一种3D眼镜。该3D液晶显示装置的驱动方法，包括使用为2倍单眼频率的目标频率对面板进行驱动的步骤，该单眼频率为62Hz~118Hz。由于将输入画面的更新频率调整到62Hz~118Hz的两倍，通过3D眼镜后的单眼频率为62~118Hz，这样就避开了常见的50Hz（中国大陆市电频率）和60Hz（台湾的市电频率）的环境光，可以有效改善环境光带来的闪烁感，且只需要修改液晶面板的输出时序即可调节，不需要调整液晶面板的其他电路，升级方便，整改难度小，有利于节约生产和改造成本。

Description

3D液晶显示装置的驱动方法、 驱动系统和一种 3D眼镜
【技术领域】
本发明涉及液晶显示领域， 更具体的说， 涉及一种 3D液晶显示装置的驱动 方法、 驱动系统和一种 3D眼镜。
【背景技术】
液晶显示装置由于其耗能少、 体积小等原因， 受到广泛消费者的热爱。 现存的 3D快门式的面板， 通常使用 100Hz或是 120Hz画面更新率， 对应 到 3D目艮镜则分别 50Hz或是 60Hz的开关频率， 但实际使用者会因为环境光同 样是 50Hz或是 60Hz的波动， 在环境光的叠加影响下 , 造成使用者有较强烈的 闪烁感产生 （如图 1 中即示出了单眼 60Hz的 3D显示面板在和 60Hz环境光叠 加的示意图）。
【发明内容】
本发明所要解决的技术问题是提供一种降低串扰的 3D 液晶显示装置的驱 动方法、 驱动系统和一种 3D眼镜。
本发明的目的是通过以下技术方案来实现的：
一种 3D液晶显示装置的驱动方法， 包括使用 (单眼频率 X 2 ) 的目标频率 对面板进行驱动的步驟， 所述单眼频率为 62 ~ 118Hz。
进一步的， 所述驱动方法还包括频率调节步骤： 将输入画面的更新频率调 整为目标频率。 可以适用于不同更新频率的输入画面， 提高了产品的适用范围。
进一步的， 所述液晶显示装置的显示驱动模块直接接收的输入画面的单眼 频率为 62 ~ 118HZ, 直接对面板进行驱动。 这样显示驱动模块（如时序驱动电 路等）不需要再对输入的信号进行频率转换， 提高了显示驱动模块的响应速度。
进一步的， 所述单眼频率为 62Hz-72Hz。 在现有技术条件下如果不增加 LVDS的数量， 其支持的换算画面更新率最高约可达 72*2Hz, 因此帧速率控制 在（ 62Hz-72Hz ) χ 2的区间可以在降低串扰的前提下不增加额外的硬件成本。 进一步的， 所述单眼频率为 65Ηζ。 目标频率优选为 65赫兹， 是由于现有 技术中常用的两种频率制式为 50赫兹与 60赫兹， 50赫兹只需要每 3帧补偿 1 帧画面， 而 60赫兹只需每 11帧后加 1帧画面， 65赫兹刚好可以以较小的间隔 取整， 为匹配这两种主流制式需要插入的画面较少， 仅采用一种画面补偿模式， 设计简单。 并且， 通过实验数据显示， 当目标频率选择在 65赫兹时， 能够达到 更佳的视觉效果， 减少用户的闪烁感。
一种 3D液晶显示装置的驱动系统， 包括使用 （单眼频率 X 2 ) 的目标频率 对面板进行驱动的显示驱动模块， 所述的单眼频率为 62 ~ 118ΗΖ。
进一步的， 所述的单眼频率为 65Ηζ。 目标频率优选为 65赫兹， 是由于现 有技术中常用的两种频率制式为 50赫兹与 60赫兹， 50赫兹只需要每 3帧补偿 1帧画面， 而 60赫兹只需每 11帧后加 1帧画面， 65赫兹刚好可以以较小的间 隔取整， 为匹配这两种主流制式需要插入的画面较少， 仅采用一种画面补偿模 式， 设计简单。 并且， 通过实验数据显示， 当目标频率选择在 65赫兹时， 能够 达到更佳的视觉效果， 减少用户的闪烁感。
进一步的， 所述显示驱动模块接收的输入画面的单眼频率为 62 - 118HZ, 直接对面板进行驱动。 这样显示驱动模块（如时序驱动电路等） 不需要再对输 入的信号进行频率转换， 提高了显示驱动模块的响应速度。
进一步的， 所述驱动模块还包括将输入画面的更新频率调整为目标频率的 转换单元。 通过转换单元可以将不同更新频率的输入画面转换成目标频率， 提 高了产品的适用范围。
一种用于本发明所述 3D液晶显示装置的驱动系统的 3D眼镜， 所述 3D眼 镜的开关频率等于所述 3D液晶显示装置的面板的单眼频率。
本发明由于将面板驱动的单眼频率调整到 62 - 118HZ, 在此更新率下面板 的输出是 124 ~ 236Hz, 对应 3D眼镜开关频率为 62 ~ 118HZ。 这样就避开了常 见的 50HZ (中国大陆的市电频率）和 60HZ (台湾的市电频率） 的环境光的影 响， 当输入画面的更新频率超过 62HZ以后， 环境光的串扰明显减少， 这样就可 以有效改善环境光带来的闪烁感， 从原理上说， 画面更新率可以无上限， 但考 虑到液晶面板所需的充电时间，将面板的单眼频率调节到 62Hz- 118Hz是比较合 适的。
【附图说明】
图 1是 3D眼镜开关频率与环境光波动结合的波形示意图；
图 2是本发明所述 3D液晶显示装置驱动方法的原理图；
图 3是本发明只用一个过压驱动表的 3D液晶显示装置驱动方法的原理图； 图 4是本发明只用一个过压驱动表的 3D液晶显示装置的驱动系统的组成示 意图；
图 5是本发明实施例一所述源源图像信号转换及系统结构示意图； 图 6是本发明实施例一左眼源图像信号转换示意图；
图 7是本发明实施例一右眼源图像信号转换示意图；
图 8是本发明实施例一图像信号转换后的信号波动图表；
图 9是不同频率信号的视觉感受对比图；
图 10是本发明实施例三的 3D液晶显示装置的驱动系统组成示意图。
其中： 10、 显示驱动模块； 20、 转换单元； 30、 以及过压驱动模块。 21、 缓冲处理模块； 22、 补偿模块。
【具体实施方式】
本发明公开一种 3D液晶显示装置的驱动方法， 包括使用 （单眼频率 X 2 ) 的目标频率对面板进行驱动的步骤， 所述单眼频率为 62 ~ 118HZ。
如图 2所述， 为了适用于不同更新频率的输入画面， 提高了产品的适用范 围， 如杲输入画面的更新频率不在目标频率的范围内， 将输入画面的更新频率 调整为目标频率。 当然， 液晶显示装置的显示驱动模块直接接收目标频率对面板进行驱动， 这样显示驱动模块（如时序驱动电路等）不需要再对输入的信号进行频率转换， 提高了显示驱动模块的响应速度。
单眼频率可以进一步优选为 62Ηζ-72Ηζ。 在现有技术条件下如果不增加 LVDS 的数量， 液晶显示装置的显示驱动芯片的极限大约可以做到 86ΜΗζ。 如 果以 86MHz 为上限倒推帧速率 （ frame rate )， 则最高帧速率约为 72Hz： 86MHz/1050/1125=72Hz , 换算画面更新率约可达 72Hz , 因此帧速率控制在 ( 62Hz-72Hz ) χ 2的区间可以在降低串扰的前提下不增加额外的硬件成本。
本发明由于将面板驱动的单眼频率调整到 62 ~ 118ΗΖ , 在此更新率下面板 的输出是 124 〜 236Ηζ， 对应 3D眼镜开关频率为 62 ~ 118ΗΖ。 这样就避开了常 见的 50ΗΖ (中国大陆的市电频率）和 60ΗΖ (台湾的市电频率） 的环境光的影 响， 当输入画面的更新频率超过 62ΗΖ以后， 环境光的串扰明显减少， 这样就可 以有效改善环境光带来的闪烁感， 从原理上说， 画面更新率可以无上限， 但考 虑到液晶面板所需的充电时间，将面板的单眼频率调节到 62Hz- 118Hz是比较合 适的。
现以 65hz的单眼频率为例： 如图 9中即示出了 50hz、 60hz和 65hz的单眼 频率和 60hz的环境光叠加后的人眼感知频率进行数学模型模拟， 即将不同的频 率下通过 3D眼睛的面板屏幕光 +环境光的叠加信号进行傅里叶变换后， 与人的 闪烁度感知对照的示意图。
从图中可以看出， 65hz的单眼频率的面板受 60hz的环境光的影响较低， 与 环境光叠加后， 其第一个较低阶的波峰不仅所在频率位置相对于叠加后的 60hz 与 50hz的单眼频率的面板来说更高， 且其分布的输出值的峰值也较低； 而有更 多的频率分布向其他更高阶的波峰移去， 对应到人眼闪烁感知曲线来看， 当目 标频率选择在 65赫兹时， 能够达到更佳的视觉效果，用户的闪烁感降低。 当然， 62hz的单眼频率的面板受 60hz的环境光的影响较之 60hz的面板来说也较低， 但其效杲稍弱于 65hz的单眼频率的面板。 显示画面的数据通过 LVDS来传输， 一组 (one channel) LVDS的实用速度上 限为 80MHz,
对应解析度与画面更新率， 则
HD@60Hz = 1 channel LVDS
FHD@60Hz = 2 channel LVDS
FHD@120Hz = 4 channel LVDS
(1) 如果不考虑成本， 也就是不限定使用 LVDS组数， 则画面更新率可以 无上限， 但考虑到液晶面板所需的充电时间， 则 480Hz大概是目前的极限。
(2) 考量成本之下不增加 LVDS组数，目前 IC的极限大约可以到 86MHz, 换算液晶面板的进行驱动的频率可达（ 62Ηζ-72Ηζ ) χ 2。
(3) 液晶面板的时序控制芯片到显示驱动芯片的介面是 mini-LVDS， 其频 率换算是 LVDS的四倍，一组的极限为 345MHz,所以单纯考量 LVDS频率极限 就可以。
下面结合附图和较佳的实施例对本发明作进一步说明。
如图 3所示， 本实施方式的频率调节步骤包括： A、 当接收到的源图像信号 的制式与预设的目标频率不同时， 对接收到的源图像信号的制式进行频率转换， 将其显示频率转换为目标频率， 生成目标图像信号； B、 使用与目标图像信号的 目标频率配合的过压驱动表进行过压驱动输出。
由于液晶的偏转反应速度不够快， 这样造成显示效果不够好， 因而出现了 过压驱动用以加快液晶的反应速度。 在过压驱动中， 所加载的额外的电压量由 先前的图像状态和当前的图像状态决定。 即根据上一帧的图像中最后一个像素 以及当前帧的图像的第一个像素来决定所述过压驱动的电压量。 由于不同画面 的灰阶不同， 过压驱动所需要的电压值也不同， 因此需要在液晶显示装置中设 置一个过压驱动表， 以符合相应的过压输出， 得到预期的画面灰阶。
本发明同时公开一种 3D液晶显示装置的驱动系统： 该 3D液晶显示装置的 驱动系统包括使用 （单眼频率 X 2 )的目标频率对面板进行驱动的显示驱动模块 10, 单眼频率为 62 ~ 118HZ。
如图 4所示， 显示驱动模块 10的输入信号的更新频率等于所述目标频率。 这样显示驱动模块 10 (如时序驱动电路等） 不需要再对输入的信号进行频率转 换， 提高了显示驱动模块 10的响应速度。
当然， 为了将不同更新频率的输入画面转换成目标频率， 提高了产品的适 用范围， 驱动模块还可以包括将输入画面的更新频率调整为目标频率的转换单 元。
本发明还公开了本发明 3D液晶显示装置的驱动系统的 3D目艮镜， 该 3D眼 镜的开关频率等于所述单眼频率， 即所述面板的目标频率的一半。
包括用于将输入画面的更新频率调整为 （ 62 ~ 118HZ ) 2的转换单元 20。 还可以在转换单元 20后面耦合过压驱动模块 30, 该过压驱动模块 30仅使用一 组与所述目标频率配合使用的过压驱动表。
本技术方案通过将频率与目标频率不同的源图像信号转换成具有目标频率 的图像信号， 这样， 液晶显示装置只需要使用一組过压驱动表就可以针对不同 频率的图像信号进行显示而不会导致灰阶亮度曲线不佳， 节省了大量的记忆体 进而节省了成本。 对于 3D显示装置来说， 不同频率左右眼图像信号的可以通过 转换成目标频率而共用一组过压驱动表， 降低闪烁感以及串扰。 而对于 2D显示 来说， 可以适应其它的频率的图像输入， 并使显示达到更优的显示效果。
对于步骤 A, 若源图像信号的频率小于目标频率， 则还执行步骤： S1 : 通 过生成新的帧画面， 并插入到源图像信号中使图像信号的频率与目标频率相同。
对于步骤 A， 若源图像信号的频率大于目标频率， 则还执行步骤： S2: 从 源图像信号中选择部分画面， 丢弃所选择的部分画面。
根据该上述驱动方法，本发明通过一个具体的 3D液晶显示装置的驱动系统 的实施例来进行进一步描述。
实施例一
如图 4、 5所示， 液晶显示装置的驱动系统包括： 转换单元 20以及过压驱 动模块 30。 转换单元 20包括： 緩冲处理模块 21以及补偿模块 22。 所述緩冲处 理模块 21内设置有： 两个画面的緩冲控制器、 与所述緩冲控制器连接的緩冲记 忆体以及固定频率时钟； 所述补偿模块 22包括： 补偿器、 静态緩冲记忆体、 緩 冲器、 X帧画面计数器以及数据输出端口。
本实施例以 60赫兹的 3D快门式显示装置的左眼源图像信号数据转换成目 标频率为 65 赫兹的目标图像信号进行说明， 当左眼数据进入緩冲处理模块 21 的两个画面的緩冲控制区， 利用固定频率时钟同时将第 N个画面与第 N+1个画 面动作侦测并存储于緩冲记忆体内。 之后同时将第 N个画面以及第 N+1个画面 输入补偿模块 22中的补偿器以及緩冲器内，并在补偿模块 22内生成补偿画面 X 同时存储于静态緩冲记忆体内， 緩冲器内的画面正常输出， 此时利用 X帧画面 计数器控制数据输出端口以控制补偿画面在恰当的时机输出 （即插入源图像信 号中， 在适当的时机（即计算得到的插入补偿画面 X的时机）将补偿画面 X插 入到第 N帧画面及第 N+1画面之间， 与之同时输出。 输出的各帧画面经过过压 驱动模块 10存储于画面记忆体内并通过与过压驱动表对比进行输出控制。
以上是本实施例中 60赫兹左眼源图像信号数据处理后进入过压驱动输出的 举例， 而若以 50赫兹的右眼信号来说， 其补偿方式也与之相同。 当然， 左右眼 信号的频率并不限于本实施例所举的数值。
本实施例中，所述插入到源图像信号中的新的帧画面即补偿画面 X为全黑、 或全白、 或计算生成的动作侦测补偿画面、 或上一帧画面、 或下一帧画面。 若 需要插入的画面数量较少， 则可选择筒单的如全黑、 全白或上一帧或下一帧画 面， 若需要插入数量较多， 则可选择计算生成的动作侦测补偿画面， 以使有较 好的显示。
本实施例中， 插入补偿画面 X的数量根据源图像信号的频率与目标频率的 差值来选择， 而其插入时机可以是平均的插入， 也可以是随机的插入， 或者在 特定的点进行插入。 如图 6所示， 左眼 60赫兹的源图像信号要转换成 65赫兹 的目标频率需要插入 5帧补偿画面 X, 本实施例采用在一个频率周期内， 将新 的帧画面平均的插入到所述源图像信号中的帧画面间方式， 即在每 11帧画面后 插入一补偿画面 X。 如图 7所示， 右眼 50赫兹的源图像信号转换成 65赫兹的 目标频率需要插入 15帧画面， 因此， 每 10帧中， 在每 3帧画面后插入一补偿 画面 X。 平均插入的方式可以使画面显示更显流畅。 如图 8所示， 补偿后的运 动曲线会产生些微小的抖动， 但在 3D观看下， 并不明显。 由于本实施例选择的 是常用的两种频率制式的信号， 分别为 50赫兹和 60赫兹， 而 50与 60正好为 5 的公约数， 为了更好的进行匹配补偿画面的平均插入， 目标频率最好也为 5 的 公约数， 本实施例所选择 65赫兹正好是 5的公约数。 或者， 目标频率还可以选 择 55赫兹， 但是需要两种模式将源图像信号改变至该目标频率， 即一种模式是 补偿画面模式， 另一种模式是丢弃画面模式， 这样即增大了设计难度和成本。 而以 65赫兹刚好可以以较小的间隔取整， 且只用补偿画面模式即可， 且为匹配 这两种主流制式需要插入的画面较少。
本发明由于将输入画面的更新频率调整到 （62 - 118HZ ) 2, 利用简易的 动画侦测与补偿， 将原本单眼的输入画面的更新率为 50祯每秒或 60祯每秒均转 换为固定的 62 - 118HZ 祯每秒作输出， 在此更新率下面板的输出是（62 - 118HZ ) 2=124 ~ 236Hz, 对应 3D眼镜开关频率为 62 ~ 118ΗΖ。 这样就避开了 常见的 50ΗΖ (中国大陆的市电频率） 和 60ΗΖ (台湾的市电频率） 的环境光的 影响， 当输入画面的更新频率超过 60ΗΖ以后， 环境光的叠加串扰明显减少， 这 样就可以有效？文善环境光带来的闪烁感， 且只需要修改液晶面板的输出时序即 可调节， 不需要调整液晶面板的其他电路， 升级方便， 整改难度小， 有利于节 约生产和改造成本。 按理说， 画面更新率可以无上限， 但考虑到液晶面板所需 的充电时间， 又由于 3D显示中， 一幅画面分左眼、 右眼两帧显示， 因此输入画 面的更新频率调节到 62Hz- 118Hz是比较合适的。
本实施例中， 通过在源图像信号进行补偿帧画面使之达到与过压驱动模块 30相对应的目标频率， 以使过压驱动模块 30能够正确的进行过压驱动。 而对于 目标频率的选择应当大于 45赫兹以上， 以使人眼不能感知到闪烁， 当然， 最好 大于 60赫兹， 以使人眼观看时有较好的效果。
实施例二：
作为发明实施例二， 与实施例一的区别在于， 左眼源图像信号为 60帧， 而 目标频率为 55赫兹， 因此， 源图像信号的处理方式是丢弃 5帧画面， 从而使其 与目标频率一致。 此时， 通过补偿模块将源图像信号中的 5 帧画面进行去除， 当然， 其去除方式也是通过从原图像信号中一个频率周期内即 60个帧画面中进 行平均抽取的， 也就是说， 按照画面显示的时间轴， 平均每隔几个画面就从中 抽取一帧丟弃。 对于右眼信号的处理方式也是相同， 即或增或减掉相应的帧画 面即可。
实施例三：
实施例一及实施例二中的源图像信号制式以及目标图像信号的频率都是确 定的， 因此不需要进行信号的判断。
而对于本实施例来说， 增加了图像信号的判断模块， 以便针对不同的源图 像信号实现一个过压驱动表进行驱动输出。 如图 10所示， 液晶显示装置的驱动 系统包括： 判断模块 10、 转换单元 20以及过压驱动模块 30。 其驱动过程可表 示如下：
A: 判断接收到的源图像信号的制式是否需要进行频率转换， 若是， 将其显 示频率转换为目标频率， 生成目标图像信号； 若否， 则源图像信号即为目标图 像信号；
B:使用与目标图像信号的目标频率配合的一个过压驱动表进行过压驱动输 出。
实施例四
本发明提高目标频率后通过插补画面的形式来平衡显示效果， 为了达到比 较理想的显示效果， 还可以有其他频率取值， 具体分析如下：
50Hz和 60Hz用 "因数分解" 得： 公因数为 2、 5， 所以只要含有公因数的画面更新率都可以用插补画面的方 式产生， 例如： 62Hz、 64Hz、 65Hz、 66Hz、 68Hz、 70Hz、 72Hz。
以 70Hz为计算范例：
β = 篇 ■≤
70' = 10： 则对应输入 50Hz， 每 5祯唯一个单位， 需插入两祯画面达成 70Hz。
对应输入 60Hz, 每 6祯唯一个单位， 需插入一祯画面达成 70Hz。
当然， 如果显示驱动模块接收的输入画面的单眼频率为 62 - 118HZ, 则可 不需要做频率调整的步骤， 而直接对面板进行驱动。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明， 比如， 若源图像画面的频率与目 标频率一致， 则在补偿模块中将不做处理。 对于本发明所属技术领域的普通技 术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干筒单推演或替换， 都应当视为属于本发明的保护范围。

Claims

权利要求
1. 一种 3D液晶显示装置的驱动方法， 包括使用 （单眼频率 X 2 ) 的目标频 率对面板进行驱动的步骤， 所述单眼频率为 62 - 118HZ。
2. 如权利要求 1所述的 3D液晶显示装置的驱动方法， 其特征在于， 所述 驱动方法还包括频率调节步骤： 将输入画面的更新频率调整为目标频率。
3. 如权利要求 1所述的 3D液晶显示装置的驱动方法， 其特征在于， 所述 液晶显示装置的显示驱动模块直接接收的输入画面的单眼频率为 62 ~ 118HZ, 直接对面板进行驱动。
4. 如权利要求 1 ~ 3任一所述的 3D液晶显示装置的驱动方法，其特征在于， 所述单眼频率为 62Hz-72Hz。
5. 如权利要求 1 ~ 3任一所述的 3D液晶显示装置的驱动方法，其特征在于， 所述单眼频率为 65Hz。
6. 一种 3D液晶显示装置的驱动系统， 包括使用 （单眼频率 X 2 ) 的目标频 率对面板进行驱动的显示驱动模块，其特征在于，所述的单眼频率为 62― 118HZ。
7. 如权利要求 6所述的 3D液晶显示装置的驱动系统， 其特征在于， 所述 的单眼频率为 65Hz。
8. 如权利要求 6所述的 3D液晶显示装置的驱动系统， 其特征在于， 所述 显示驱动模块接收的输入画面的单眼频率为 62 - 118HZ, 直接对面板进行驱动。
9. 如权利要求 6所述的 3D液晶显示装置的驱动系统， 其特征在于， 所述 驱动模块还包括将输入画面的更新频率调整为目标频率的转换单元。
10. 一种用于权利要求 Ί ~ 9任一所述 3D液晶显示装置的驱动系统的 3D眼 镜， 其特征在于， 所述 3D眼镜的开关频率等于所述 3D液晶显示装置的面板的 单眼频率。
PCT/CN2013/076323 2012-09-29 2013-05-28 3d液晶显示装置的驱动方法、驱动系统和一种3d眼镜 WO2014048125A1 (zh)

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