WO2018014380A1 - 伽马电压生成电路及驱动装置 - Google Patents

伽马电压生成电路及驱动装置 Download PDF

Info

Publication number
WO2018014380A1
WO2018014380A1 PCT/CN2016/094462 CN2016094462W WO2018014380A1 WO 2018014380 A1 WO2018014380 A1 WO 2018014380A1 CN 2016094462 W CN2016094462 W CN 2016094462W WO 2018014380 A1 WO2018014380 A1 WO 2018014380A1
Authority
WO
WIPO (PCT)
Prior art keywords
gamma
voltage
signal
data storage
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/094462
Other languages
English (en)
French (fr)
Inventor
郭星灵
陈伟
谭小平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US15/126,501 priority Critical patent/US10083663B2/en
Publication of WO2018014380A1 publication Critical patent/WO2018014380A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • 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
    • G09G3/20—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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode 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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of liquid crystal panel technology, and in particular, to a gamma voltage generating circuit and a driving device having the gamma voltage generating circuit.
  • the RGBW liquid crystal panel (liquid crystal panel based on red, green, blue and white four-color display technology) has a larger transmittance of the liquid crystal panel by adding a W (white) pixel unit to the RGB three sub-pixel units of the original RGB liquid crystal panel.
  • the boosting reduces the backlight power consumption and saves power while improving the contrast of the display.
  • the RGBW liquid crystal panel is introduced into the W pixel unit, the aperture ratio of the three sub-pixel units of the RGBW liquid crystal panels R, G, and B is 75% of that of the conventional RGB liquid crystal panel, and the overall brightness of the RGBW screen is lower when the solid color screen is displayed. RGB screen, the display is dark.
  • the present application provides a gamma voltage generating circuit, and a driving device having the gamma voltage generating circuit, which can improve the overall brightness performance of the RGBW liquid crystal panel.
  • a gamma voltage generating circuit includes an image detecting module, a control module and a gamma voltage module; the image detecting module is configured to acquire an image input signal, and detect the image input signal, and determine the When the gray scale indicated by the image input signal includes a solid color gray scale, generating and outputting a first detection result signal for indicating the solid color gray scale; the control module is electrically connected to the image detecting module, and is configured to receive the The first detection result signal output by the image detecting module generates and outputs a first control signal according to the first detection result signal; the gamma voltage module is electrically connected to the control module for receiving The first control signal output by the control module is generated according to the first control signal a first gamma reference voltage, the first gamma reference voltage corresponding to a first gray scale voltage, the first gray scale voltage causing an adjustment display of a red sub-pixel unit in a pixel unit that loads the first gray scale voltage The brightness is greater than the initial display brightness of the red sub-pixel unit, the adjusted
  • the gamma voltage module includes a gamma data storage unit, a gamma voltage generating unit, and a voltage dividing unit; the gamma data storage unit is electrically connected to the control module, and the gamma data storage unit stores Address information of the first binding point voltage, the gamma data storage unit is configured to receive the first control signal output by the control module, and search for address information of the first binding point voltage according to the first control signal Generating a first address signal indicating address information of the first binding point voltage, and outputting the first address signal; the gamma voltage generating unit is electrically connected to the gamma data storage unit for receiving The first address signal output by the gamma data storage unit generates the first binding voltage according to the first indication signal; the voltage dividing unit is electrically connected to the gamma voltage generating unit, for The first binding point voltage generated by the gamma voltage generating unit is divided to generate the first gamma reference voltage.
  • the gamma data storage unit specifically stores display lookup table information of the first binding point voltage.
  • the image detecting module is further configured to detect the image input signal, and when it is confirmed that the gray level indicated by the image input signal further includes a non-pure color gray scale, generate and output to indicate the non- a second detection result signal of the solid gray scale;
  • the control module is further configured to receive the second detection result signal output by the image detection module, generate and output a second according to the second detection result signal a control signal;
  • the gamma voltage module is further configured to receive the second control signal output by the control module, generate a second gamma reference voltage according to the second control signal, where the second gamma reference voltage corresponds to a second gray scale voltage, wherein the adjusted display brightness of each of the pixel units loaded in the second gray scale voltage is equal to an initial display brightness of each sub-pixel unit, respectively.
  • a driving device comprising a display line buffer, a level shifter, a digital-to-analog converter, a buffer amplifier and the gamma voltage generating circuit described above;
  • the display line buffer is configured to acquire an image input signal, and input an image to the image Performing a conversion to generate a parallel image data signal, outputting the parallel image data signal;
  • the level shifter is electrically coupled to the display line buffer for receiving the display line buffer The parallel image data signal output by the device, voltage-amplifying and outputting the parallel image data signal;
  • the digital-to-analog converter is electrically connected to the level shifter and the gamma voltage module, the digital mode The converter is configured to obtain the parallel image data signal amplified by the level shifter voltage, and the first gamma reference voltage output by the gamma voltage module, and the parallel image data amplified according to the voltage Generating a first gray scale voltage with the first gamma reference voltage, the first gray scale voltage causing an adjusted display brightness of a red sub-
  • the gamma voltage module includes a gamma data storage unit, a gamma voltage generating unit, and a voltage dividing unit; the gamma data storage unit is electrically connected to the control module, and the gamma data storage unit stores Address information of the first binding point voltage, the gamma data storage unit is configured to receive the first control signal output by the control module, and search for address information of the first binding point voltage according to the first control signal Generating a first address signal indicating address information of the first binding point voltage, and outputting the first address signal; the gamma voltage generating unit is electrically connected to the gamma data storage unit for receiving The first address signal output by the gamma data storage unit generates the first binding voltage according to the first indication signal; the voltage dividing unit is electrically connected to the gamma voltage generating unit, for The first binding point voltage generated by the gamma voltage generating unit is divided to generate the first gamma reference voltage.
  • the gamma data storage unit specifically stores display lookup table information of the first binding point voltage.
  • the image detecting module is further configured to detect the image input signal, and when it is confirmed that the gray level indicated by the image input signal further includes a non-pure color gray scale, generate and output to indicate the non- a second detection result signal of the solid gray scale;
  • the control module is further configured to receive the second detection result signal output by the image detection module, generate and output a second according to the second detection result signal a control signal;
  • the gamma voltage module is further configured to receive the second control signal output by the control module, Generating a second gamma reference voltage according to the second control signal, where the second gamma reference voltage corresponds to a second gray scale voltage, and the second gray scale voltage is caused to be in a pixel unit that loads the second gray scale voltage
  • the adjusted display brightness of each sub-pixel unit is equal to the initial display brightness of each sub-pixel unit.
  • the image detecting module in the gamma voltage generating circuit detects an image input signal, and determines that the gray scale indicated by the image input signal includes a solid color gray scale Sending a first detection result signal to the control module; the control module generates a first control signal according to the first detection result signal, where the first control signal is used to control the gamma voltage module to generate a first gamma reference voltage And the first gray scale voltage corresponding to the first gamma reference voltage can improve the adjusted display brightness of the R, G sub-pixels that contribute higher to the overall display brightness of the pixel unit, and reduce the contribution to the overall display brightness.
  • the B sub-pixels adjust the display brightness, thereby improving the overall brightness performance of the RGBW liquid crystal panel.
  • FIG. 1 is a schematic structural view of a driving device according to an embodiment of the present application.
  • FIG. 2 is a schematic structural view of the gamma voltage module shown in FIG. 1.
  • Figure 3 is a Gamma 2.2 curve in the prior art.
  • FIG. 4 is a gamma curve after adjustment according to an embodiment of the present application.
  • the driving device 300 of the first embodiment of the present application includes a display line buffer 240, a level shifter 230, a digital-to-analog converter 220, a buffer amplifier 210, and a gamma voltage generating circuit 100.
  • the driving device 300 is capable of receiving an image input signal, and after performing a series of processes thereon, generates a gray scale signal for driving the data line of the liquid crystal panel.
  • the driving device 300 includes the above circuit module as an example for description. However, it should be understood that the driving device 300 actually includes other related circuit modules, which are not described too much herein.
  • the display line buffer 240 is configured to acquire an image input signal, convert the image input signal to generate a parallel image data signal, and output the parallel image data signal.
  • the image input signal obtained by the line buffer 240 is displayed as an RGB input signal, and the RGB input signal is a serial signal, which needs to be converted into the parallel image data signal for further transmission and processing.
  • the level shifter 230 is electrically connected to the display line buffer 240 for receiving the parallel image data signal outputted by the display line buffer 240, and voltage-amplifies and outputs the parallel image data signal.
  • the gamma voltage generating circuit 100 is configured to acquire the image input signal and, after a series of processes, finally output a set of gamma reference voltages.
  • the digital to analog converter 220 is electrically connected to the level shifter 230 and the gamma voltage generating circuit 100.
  • the digital-to-analog converter 220 is configured to acquire the parallel image data signal after voltage amplification by the level converter 230, and the set of gamma reference voltages output by the gamma voltage generating circuit 100, and then use the voltage amplification to And a parallel image data signal, wherein a gamma reference voltage for driving the liquid crystal panel data line is selected from the set of gamma reference voltages. That is, the digital-to-analog converter 220 has the function of a selector, and the gamma reference voltage selected by the digital-to-analog converter 220 is a gray scale voltage.
  • the digital to analog converter 220 outputs the gray scale voltage to the buffer amplifier 210.
  • the buffer amplifier 210 is electrically connected to the digital-to-analog converter 220, and the gray scale voltage output from the digital-to-analog converter 220 is loaded on the buffer amplifier 210.
  • the buffer amplifier 210 performs load amplification processing on the gray scale voltage to generate and output an analog signal for driving the liquid crystal panel data line.
  • the overall description of the driving device 300 of the present embodiment has been made above.
  • the gamma voltage generating circuit 100 of the present embodiment will be described in detail below.
  • the gamma voltage generating circuit 100 includes an image detecting module 110 , a control module 120 , and a gamma voltage module 130 .
  • the image detecting module 110 is configured to acquire the image input signal and detect the image input signal. When it is determined that the gray scale indicated by the image input signal includes a solid color gray scale, a first detection result signal for indicating the solid color gray scale is generated and output.
  • the image detecting module 110 acquires the image input signal (ie, the RGB input signal), and the RGB input signal carries a gray scale to be displayed in a plurality of pixel units.
  • the RGB input signal may include a solid color gray scale for performing solid color display in a plurality of pixel units, and may also include a non-solid color gray scale for performing non-solid color display in other plurality of pixel units.
  • the gray level of the non-pure color means that a certain pixel unit has a gray scale value other than the gray scale value in the gray scale of the solid color, that is, the gray scale values of the three sub-pixel units of R, G, and B are not zero.
  • the image detecting module 110 After acquiring the RGB input signal, the image detecting module 110 detects the RGB input signal to determine whether the gray level carried by the RGB input signal includes the solid color gray scale. When it is confirmed that the solid color gray scale is included, the image detecting module 110 generates a first detection result signal indicating the solid color gray scale, and outputs the first detection result signal to the control module 120.
  • the control module 120 is electrically connected to the image detecting module 110, and configured to receive the first detection result signal output by the image detecting module 110, and generate and output a first control signal according to the first detection result signal. Specifically, the control module 120 receives the first detection result signal, and then generates and outputs the first control signal according to the solid color gray scale carried by the first detection result signal, the first control signal. It will be used to control the gamma voltage module 130 to generate a gamma reference voltage.
  • the gamma voltage module 130 is electrically connected to the control module 120 and configured to receive the first control signal output by the control module 120, and generate the set of gamma reference voltages according to the first control signal, where the first The first gamma reference voltage is included in the group gamma reference voltage.
  • the first gamma reference voltage corresponds to a first gray scale voltage
  • the first gray scale voltage is such that an adjusted display luminance of a red sub-pixel unit in a pixel unit loaded with the first gray scale voltage is greater than a red sub-pixel unit
  • the initial display brightness, the adjusted display brightness of the green sub-pixel unit is greater than the initial display brightness of the green sub-pixel unit, and the adjusted display brightness of the blue sub-pixel unit is smaller than the initial display brightness of the blue sub-pixel unit.
  • the gamma voltage module 130 After receiving the first control signal, the gamma voltage module 130 generates the set of gamma reference voltages according to the first control signal, where the set of gamma reference voltages includes a first gamma reference a voltage, the first gamma reference voltage being used to drive the pixel unit to perform the solid color display.
  • the set of gamma reference voltages is output to a digital to analog converter 220, which simultaneously receives the voltage amplified parallel image input signals.
  • the digital-to-analog converter 220 selects the first gamma reference voltage from the set of gamma reference voltages as the first gray scale voltage using the parallel image input signal after voltage amplification (ie, the The first gamma reference voltage corresponds to the first gray scale voltage). Thereafter, the digital to analog converter 220 outputs the first gray scale voltage to drive the pixel unit to perform the solid color display.
  • the selected first gamma reference voltage has a characteristic that an adjusted display brightness of a red sub-pixel unit in a pixel unit loaded with the first gray scale voltage is greater than an initial display brightness of a red sub-pixel unit, a green sub-pixel
  • the adjustment display brightness of the unit is greater than the initial display brightness of the green sub-pixel unit
  • the adjusted display brightness of the blue sub-pixel unit is smaller than the initial display brightness of the blue sub-pixel unit.
  • the relationship between the grayscale value of the sub-pixel and its display luminance conforms to the Gamma 2.2 curve.
  • Fig. 2 there are R Gamma 2.2 curve, G Gamma 2.2 curve and B Gamma 2.2 curve, respectively, and the three gamma curves are coincident.
  • the initial display brightness of each sub-pixel unit refers to the display brightness of a specific gray level on the prior art Gamma 2.2 curve even when the solid color display is performed.
  • the adjusted display brightness of each sub-pixel unit refers to the display brightness when the sub-pixel unit performs the solid color display by using the scheme of the embodiment.
  • the relationship between the adjusted display brightness of each sub-pixel unit and the grayscale value of each sub-pixel still conforms to the gamma curve.
  • this gamma curve is an adjusted gamma curve that is different from the Gamma 2.2 curve described above.
  • the adjusted R gamma curve is located above the RGamma 2.2 curve, that is, the adjusted display brightness of the R sub-pixel unit is greater than the R sub- The initial display brightness of the pixel unit.
  • the ends of the adjusted R gamma curve are coincident with the ends of the R Gamma 2.2 curve.
  • the adjusted G gamma curve is located above the G Gamma 2.2 curve except for the first and last ends, that is, the adjusted display brightness of the G sub-pixel unit is greater than the G sub-pixel unit.
  • the initial display brightness; except for the first and last ends, the adjusted B gamma curve is below the B Gamma 2.2 curve, that is, the adjusted display brightness of the B sub-pixel unit is smaller than the initial display brightness of the B sub-pixel unit.
  • the overall display brightness of the pixel unit due to the display brightness of the three sub-pixel units of R, G, and B set.
  • the R sub-pixel unit contributes about 26% to the overall display brightness
  • the G sub-pixel unit contributes about 58% to the overall display brightness
  • the B sub-pixel unit contributes 16% to the overall display brightness.
  • the adjusted display brightness of the R and G sub-pixel units is greater than the initial display brightness of the R and G sub-pixel units
  • the adjusted display brightness of the B sub-pixel unit is smaller than the initial display brightness of the B sub-pixel unit.
  • the adjusted display brightness of the R, G, and B sub-pixel units is made to conform to the adjusted gamma curve of the R, G, and B sub-pixel units, thereby improving the R, G sub-pixels that contribute high to the overall display brightness.
  • the display brightness reduces the display brightness of the B sub-pixels that contribute less to the overall display brightness. That is, the overall display brightness is redistributed among the three sub-pixel units R, G, and B.
  • the gamma voltage module 130 further includes a gamma data storage unit 131, a gamma voltage generating unit 132, and a voltage dividing unit 133.
  • the gamma data storage unit 131 is electrically connected to the control module 120, and the gamma data storage unit 131 stores address information of the first binding point voltage.
  • the gamma data storage unit 131 is configured to receive the first control signal output by the control module 120, search for address information of the first binding point voltage according to the first control signal, and then generate a voltage indicating the first binding point.
  • the first address signal of the address information and outputs the first address signal.
  • the first pinch point voltage is also a gamma reference voltage that is used to generate the first gamma reference voltage.
  • the gamma data storage unit 131 specifically stores the lookup table (Look-Up-Table, LUT for short) information of the first binding point voltage.
  • the gamma data storage unit 131 may store the address information of the first binding voltage in other manners.
  • the gamma voltage generating unit 132 is electrically connected to the gamma data storage unit 131 for receiving the first address signal output by the gamma data storage unit 131, and generating the first binding voltage according to the first indication signal.
  • the voltage dividing unit 133 is electrically connected to the gamma voltage generating unit 132 for dividing the first binding voltage generated by the gamma voltage generating unit 132 to generate the first gamma reference voltage.
  • the driving device 300 of the present embodiment detects the image input signal by setting the gamma voltage generating circuit 100, and the image detecting module 110 in the gamma voltage generating circuit 100 determines the gray of the image input signal indication.
  • the step includes the solid color gray scale
  • the first detection result signal is sent to the control module 120; the control module 120 generates a first control signal according to the first detection result signal, the first control The signal is used to control the gamma voltage module 130 to generate a first gamma reference voltage; and the first gray scale voltage corresponding to the first gamma reference voltage can increase R, G which contributes a higher contribution to the overall display brightness of the pixel unit.
  • the adjustment of the sub-pixels displays the brightness and reduces the adjusted display brightness of the B sub-pixels that contribute less to the overall display brightness, thereby improving the overall brightness performance of the RGBW liquid crystal panel. Moreover, by reducing the adjustment display brightness of the B sub-pixels, the effect of low blue light eye protection is further achieved, so that the RGBW liquid crystal panel has the function of low blue light eye protection.
  • the image detecting module 110 is further configured to generate and output when the gray level indicated by the image input signal further includes a non-pure color gray scale. a second detection result signal for indicating the non-solid color gray scale.
  • the control module 120 is further configured to receive the second detection result signal output by the image detection module 110, and generate and output a second control signal according to the second detection result signal.
  • the gamma voltage module 130 is further configured to receive the second control signal output by the control module 120, and generate a second gamma reference voltage according to the second control signal.
  • the second gamma reference voltage corresponds to a second gray scale voltage
  • the second gray scale voltage is such that an adjusted display luminance of each of the pixel units loaded in the second gray scale voltage is equal to each sub-pixel unit
  • the initial display brightness that is, when the pixel unit performs the non-solid color display, the second gamma reference voltage generated by the gamma voltage generating circuit 100 of the embodiment is such that the display brightness of each sub-pixel is taken according to the Gamma 2.2 curve, instead of The overall display brightness is distributed among the respective sub-pixels.
  • the gamma data storage unit 131 further stores address information of the second binding voltage.
  • the gamma data storage unit 131 is further configured to receive the second control signal output by the control module 120, search for address information of the second binding point voltage according to the second control signal, and then generate an indication of the second binding point. a second address signal of the address information of the voltage and outputting the second address signal.
  • the second pinch point voltage is also a gamma reference voltage for generating the second gamma reference voltage.
  • the gamma data storage unit 131 specifically stores a look-up table (Look-Up-Table, LUT for short) information of the second binding point voltage.
  • the gamma data storage unit 131 may store the address information of the second binding voltage in other manners.
  • the gamma voltage generating unit 132 is further configured to receive the second address signal output by the gamma data storage unit 131, and generate the second binding voltage according to the second address signal.
  • the voltage dividing unit 133 is further configured to divide the second binding voltage generated by the gamma voltage generating unit 132 to The second gamma reference voltage is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

一种伽马电压生成电路（100）及具有所述伽马电压生成电路（100）的驱动装置（300），包括图像侦测模块（110）、控制模块（120）及伽马电压模块（130）；所述图像侦测模块（110）用于获取图像输入信号，并对所述图像输入信号进行侦测，在确定所述图像输入信号指示的灰阶包括纯色灰阶时，生成并输出用于指示所述纯色灰阶的第一侦测结果信号；所述控制模块（120）与所述图像侦测模块（110）电连接，用于接收所述图像侦测模块（110）输出的所述第一侦测结果信号，根据所述第一侦测结果信号生成并输出第一控制信号；所述伽马电压模块（130）与所述控制模块（120）电连接，用于接收所述控制模块（120）输出的所述第一控制信号，根据所述第一控制信号生成第一伽马参考电压。

Description

伽马电压生成电路及驱动装置
本申请要求于2016年7月20日提交中国专利局、申请号为201610579353.0、发明名称为“伽马电压生成电路及驱动装置”的中国专利申请的优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本申请涉及液晶面板技术领域，尤其涉及一种伽马电压生成电路及具有所述伽马电压生成电路的驱动装置。
背景技术
RGBW液晶面板(基于红绿蓝白四基色显示技术的液晶面板)通过在原有RGB液晶面板的RGB三个子像素单元之外增加一个W(白)像素单元，使得液晶面板的穿透率得到较大提升，从而降低了背光源功耗、达到省电效果，同时又提高了显示画面的对比度。然而，由于RGBW液晶面板引入W像素单元，所以RGBW液晶面板R、G、B三个子像素单元的开口率为常规RGB液晶面板的75％，在显示纯色画面时，RGBW屏幕的整体亮度会低于RGB屏幕，显示画面偏暗。
发明内容
有鉴于此，本申请提供了一种伽马电压生成电路，以及具有所述伽马电压生成电路的驱动装置，能够提升了RGBW液晶面板的整体亮度表现。
一种伽马电压生成电路，包括图像侦测模块、控制模块及伽马电压模块；所述图像侦测模块用于获取图像输入信号，并对所述图像输入信号进行侦测，在确定所述图像输入信号指示的灰阶包括纯色灰阶时，生成并输出用于指示所述纯色灰阶的第一侦测结果信号；所述控制模块与所述图像侦测模块电连接，用于接收所述图像侦测模块输出的所述第一侦测结果信号，根据所述第一侦测结果信号生成并输出第一控制信号；所述伽马电压模块与所述控制模块电连接，用于接收所述控制模块输出的所述第一控制信号，根据所述第一控制信号生成 第一伽马参考电压，所述第一伽马参考电压对应第一灰阶电压，所述第一灰阶电压使得加载所述第一灰阶电压的像素单元中的红色子像素单元的调整显示亮度大于红色子像素单元的初始显示亮度、绿色子像素单元的调整显示亮度大于绿色子像素单元的初始显示亮度、蓝色子像素单元的调整显示亮度小于蓝色子像素单元的初始显示亮度。
其中，所述伽马电压模块包括伽马数据存储单元、伽马电压生成单元和分压单元；所述伽马数据存储单元与所述控制模块电连接，所述伽马数据存储单元中存储有第一绑点电压的地址信息，所述伽马数据存储单元用于接收所述控制模块输出的所述第一控制信号，根据所述第一控制信号查找所述第一绑点电压的地址信息，生成指示所述第一绑点电压的地址信息的第一地址信号，并输出所述第一地址信号；所述伽马电压生成单元与所述伽马数据存储单元电连接，用于接收所述伽马数据存储单元输出的所述第一地址信号，根据所述第一指示信号生成所述第一绑点电压；所述分压单元与所述伽马电压生成单元电连接，用于对所述伽马电压生成单元生成的所述第一绑点电压进行分压，以生成所述第一伽马参考电压。
其中，所述伽马数据存储单元中具体存储有所述第一绑点电压的显示查找表信息。
其中，所述图像侦测模块还用于对所述图像输入信号进行侦测，并在确认所述图像输入信号指示的灰阶还包括非纯色灰阶时，生成并输出用于指示所述非纯色灰阶的第二侦测结果信号；所述控制模块还用于接收所述图像侦测模块输出的所述第二侦测结果信号，根据所述第二侦测结果信号生成并输出第二控制信号；所述伽马电压模块还用于接收所述控制模块输出的所述第二控制信号，根据所述第二控制信号生成第二伽马参考电压，所述第二伽马参考电压对应第二灰阶电压，所述第二灰阶电压使得加载所述第二灰阶电压的像素单元中的各个子像素单元的调整显示亮度分别等于各个子像素单元的初始显示亮度。
一种驱动装置，包括显示行缓冲器、电平转换器、数模转换器、缓冲放大器及上述的伽马电压生成电路；所述显示行缓冲器用于获取图像输入信号，对所述图像输入信号进行转换以生成并行图像数据信号，输出所述并行图像数据信号；所述电平转换器与所述显示行缓冲器电连接，用于接收所述显示行缓冲 器输出的所述并行图像数据信号，对所述并行图像数据信号进行电压放大并输出；所述数模转换器与所述电平转换器及所述伽马电压模块电连接，所述数模转换器用于获取经所述电平转换器电压放大后的所述并行图像数据信号，及所述伽马电压模块输出的所述第一伽马参考电压，根据电压放大后的所述并行图像数据信号与所述第一伽马参考电压生成第一灰阶电压，所述第一灰阶电压使得对应加载所述第一灰阶电压的像素单元中的红色子像素单元的调整显示亮度大于红色子像素单元的初始显示亮度、绿色子像素单元的调整显示亮度大于绿色子像素单元的初始显示亮度、蓝色子像素单元的调整显示亮度小于蓝色子像素单元的初始显示亮度；所述缓冲放大器与所述数模转换器电连接，所述缓冲放大器上加载所述数模转换器输出的所述第一灰阶电压，所述缓冲放大器对所述第一灰阶电压进行负载放大处理以生成并输出用于驱动像素单元的模拟信号。
其中，所述伽马电压模块包括伽马数据存储单元、伽马电压生成单元和分压单元；所述伽马数据存储单元与所述控制模块电连接，所述伽马数据存储单元中存储有第一绑点电压的地址信息，所述伽马数据存储单元用于接收所述控制模块输出的所述第一控制信号，根据所述第一控制信号查找所述第一绑点电压的地址信息，生成指示所述第一绑点电压的地址信息的第一地址信号，并输出所述第一地址信号；所述伽马电压生成单元与所述伽马数据存储单元电连接，用于接收所述伽马数据存储单元输出的所述第一地址信号，根据所述第一指示信号生成所述第一绑点电压；所述分压单元与所述伽马电压生成单元电连接，用于对所述伽马电压生成单元生成的所述第一绑点电压进行分压，以生成所述第一伽马参考电压。
其中，所述伽马数据存储单元中具体存储有所述第一绑点电压的显示查找表信息。
其中，所述图像侦测模块还用于对所述图像输入信号进行侦测，并在确认所述图像输入信号指示的灰阶还包括非纯色灰阶时，生成并输出用于指示所述非纯色灰阶的第二侦测结果信号；所述控制模块还用于接收所述图像侦测模块输出的所述第二侦测结果信号，根据所述第二侦测结果信号生成并输出第二控制信号；所述伽马电压模块还用于接收所述控制模块输出的所述第二控制信号， 根据所述第二控制信号生成第二伽马参考电压，所述第二伽马参考电压对应第二灰阶电压，所述第二灰阶电压使得加载所述第二灰阶电压的像素单元中的各个子像素单元的调整显示亮度分别等于各个子像素单元的初始显示亮度。
由此，本申请的伽马电压生成电路及驱动装置，所述伽马电压生成电路中的图像侦测模块侦测图像输入信号，并在确定所述图像输入信号指示的灰阶包括纯色灰阶时，向控制模块发送第一侦测结果信号；控制模块根据所述第一侦测结果信号生成第一控制信号，所述第一控制信号用于控制伽马电压模块生成第一伽马参考电压；而所述第一伽马参考电压对应的第一灰阶电压能够提升对像素单元的整体显示亮度贡献较高的R、G子像素的调整显示亮度、降低对所述整体显示亮度贡献较低的B子像素的调整显示亮度，从而提升了RGBW液晶面板的整体亮度表现。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，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是本申请实施例的驱动装置的结构示意图。
图2是图1所示的伽马电压模块的结构示意图。
图3是现有技术中的Gamma 2.2曲线。
图4是本申请实施例提供的经过调整以后的伽马曲线。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1所示，本申请第一实施例的驱动装置300包括显示行缓冲器240、电平转换器230、数模转换器220、缓冲放大器210及伽马电压生成电路100。 驱动装置300能够接收图像输入信号，对其进行一系列处理之后，生成用于驱动液晶面板数据线的灰阶信号。本实施例中，为了简洁，仅以驱动装置300包括上述电路模块为例进行描述。但是应理解，驱动装置300实际上还包括其他相关电路模块，在此不做过多描述。
其中，显示行缓冲器240用于获取图像输入信号，对所述图像输入信号进行转换以生成并行图像数据信号，输出所述并行图像数据信号。显示行缓冲器240获取的所述图像输入信号即RGB输入信号，此RGB输入信号为串行信号，需要将其转换为所述并行图像数据信号，才能进一步地进行传输与处理。
电平转换器230与显示行缓冲器240电连接，用于接收显示行缓冲器240输出的所述并行图像数据信号，对所述并行图像数据信号进行电压放大并输出。
伽马电压生成电路100用于获取所述图像输入信号，并经过一系列处理，最终输出一组伽马参考电压。
数模转换器220与电平转换器230及伽马电压生成电路100电连接。数模转换器220用于获取经电平转换器230电压放大后的所述并行图像数据信号，及伽马电压生成电路100输出的所述一组伽马参考电压，然后使用电压放大后所述并行图像数据信号，从所述一组伽马参考电压中选出用于驱动液晶面板数据线的伽马参考电压。即数模转换器220具备选择器的功能，数模转换器220选出的伽马参考电压即灰阶电压。数模转换器220向缓冲放大器210输出所述灰阶电压。
缓冲放大器210与数模转换器220电连接，缓冲放大器210上加载数模转换器220输出的所述灰阶电压。缓冲放大器210对所述灰阶电压进行负载放大处理，以生成并输出用于驱动液晶面板数据线的模拟信号。
上文对本实施例的驱动装置300做了一个总括性的描述。以下将详细描述本实施例的伽马电压生成电路100。
如图1所示，伽马电压生成电路100包括图像侦测模块110、控制模块120及伽马电压模块130。
其中，图像侦测模块110用于获取所述图像输入信号，并对所述图像输入信号进行侦测。在确定所述图像输入信号指示的灰阶包括纯色灰阶时，生成并输出用于指示所述纯色灰阶的第一侦测结果信号。
具体的，图像侦测模块110获取所述图像输入信号(即所述RGB输入信号)，所述RGB输入信号携带有将在多个像素单元中进行显示的灰阶。其中，所述RGB输入信号可以包括在若干像素单元中进行纯色显示的纯色灰阶，还可以包括在其他若干像素单元中进行非纯色显示的非纯色灰阶。所述纯色灰阶指的是某个像素单元中，R、G、B三个子像素单元的灰阶值有一个或两个为零，而其余为非零。例如，R＝0，G＝12，B＝13，或者R＝0，G＝0，B＝13等均为纯色灰阶，其对应的显示状态为所述纯色显示。所述非纯色灰阶指的是某个像素单元具有除所述纯色灰阶中的灰阶值之外的灰阶值，即R、G、B三个子像素单元的灰阶值均不为零，例如，R＝11，G＝12，B＝13，或R＝13，G＝13，B＝13等；或者，R、G、B三个子像素单元的灰阶值均为零，此两种情况对应的显示状态为所述非色显示。获取所述RGB输入信号后，图像侦测模块110对所述RGB输入信号进行侦测，以确定所述RGB输入信号携带的灰阶是否包括了所述纯色灰阶。在确认包括所述纯色灰阶时，图像侦测模块110生成指示所述纯色灰阶的第一侦测结果信号，并向控制模块120输出所述第一侦测结果信号。
其中，控制模块120与图像侦测模块110电连接，用于接收图像侦测模块110输出的所述第一侦测结果信号，根据所述第一侦测结果信号生成并输出第一控制信号。具体的，控制模块120接收所述第一侦测结果信号，然后根据所述第一侦测结果信号携带的所述纯色灰阶，生成并输出所述第一控制信号，所述第一控制信号将用于控制伽马电压模块130生成伽马参考电压。
其中，伽马电压模块130与控制模块120及电连接，用于接收控制模块120输出的所述第一控制信号，根据所述第一控制信号生成所述一组伽马参考电压，所述一组伽马参考电压中包括第一伽马参考电压。所述第一伽马参考电压对应第一灰阶电压，所述第一灰阶电压使得加载所述第一灰阶电压的像素单元中的红色子像素单元的调整显示亮度大于红色子像素单元的初始显示亮度、绿色子像素单元的调整显示亮度大于绿色子像素单元的初始显示亮度、蓝色子像素单元的调整显示亮度小于蓝色子像素单元的初始显示亮度。
具体的，伽马电压模块130接收所述第一控制信号后，根据所述第一控制信号生成所述一组伽马参考电压，所述一组伽马参考电压中包括第一伽马参考 电压，所述第一伽马参考电压用于驱动像素单元进行所述纯色显示。所述一组伽马参考电压输出到数模转换器220，数模转换器220同时接收电压放大后的所述并行图像输入信号。数模转换器220使用电压放大后的所述并行图像输入信号，从所述一组伽马参考电压中选出所述第一伽马参考电压，作为所述第一灰阶电压(即所述第一伽马参考电压对应所述第一灰阶电压)。之后，数模转换器220输出所述第一灰阶电压，以驱动像素单元进行所述纯色显示。
选出的所述第一伽马参考电压具有这样的特性：加载所述第一灰阶电压的像素单元中的红色子像素单元的调整显示亮度大于红色子像素单元的初始显示亮度、绿色子像素单元的调整显示亮度大于绿色子像素单元的初始显示亮度、蓝色子像素单元的调整显示亮度小于蓝色子像素单元的初始显示亮度。
如图2所示，现有技术中，子像素的灰阶值与其显示亮度的关系符合Gamma 2.2曲线。图2中分别存在R Gamma 2.2曲线、G Gamma 2.2曲线及B Gamma 2.2曲线，这三条伽马曲线是重合的。本实施例中，各个子像素单元的所述初始显示亮度即使指在进行所述纯色显示时，各个子像素单元在现有技术的Gamma 2.2曲线上对应某一特定灰阶的显示亮度。而各个子像素单元的所述调整显示亮度指的是采用本实施例的方案，各个子像素单元进行所述纯色显示时的显示亮度。
如图3所示，本实施例中，各个子像素单元的所述调整显示亮度与各个子像素的灰阶值之间的关系，仍然符合伽马曲线。但是，此种伽马曲线是一种经过调整后的伽马曲线，其与上述的Gamma 2.2曲线不同。具体如图3所示，本实施例中，除首尾两端之外的其余部分，调整后的R伽马曲线是位于RGamma 2.2曲线之上的，即R子像素单元的调整显示亮度大于R子像素单元的初始显示亮度。但是应注意，根据常规原理，调整后的R伽马曲线的首尾两端，与R Gamma 2.2曲线的首尾两端仍然是重合的。同样的，如图3所示，除首尾两端之外的其余部分，调整后的G伽马曲线是位于G Gamma 2.2曲线之上的，即G子像素单元的调整显示亮度大于G子像素单元的初始显示亮度；除首尾两端之外的其余部分，调整后的B伽马曲线是位于B Gamma 2.2曲线之下的，即B子像素单元的调整显示亮度小于B子像素单元的初始显示亮度。
像素单元的整体显示亮度，由于R、G、B三个子像素单元的显示亮度决 定。其中R子像素单元对所述整体显示亮度贡献约占26％，G子像素单元对所述整体显示亮度的贡献约占58％，B子像素单元对所述整体显示亮度的贡献占16％。本实施例的方案，通过使R、G子像素单元的调整显示亮度大于R、G子像素单元的初始显示亮度、B子像素单元的调整显示亮度小于B子像素单元的初始显示亮度。即，使得R、G、B子像素单元的调整显示亮度符合调整后的R、G、B子像素单元的伽马曲线，从而提高了对所述整体显示亮度贡献较高的R、G子像素的显示亮度、降低了对所述整体显示亮度贡献较低的B子像素的显示亮度。也就是将所述整体显示亮度在R、G、B三个子像素单元间进行了重新分配。
进一步的，在本实施例中，如图4所示，伽马电压模块130还包括伽马数据存储单元131、伽马电压生成单元132和分压单元133。
其中，伽马数据存储单元131与控制模块120电连接，伽马数据存储单元131中存储有第一绑点电压的地址信息。伽马数据存储单元131用于接收控制模块120输出的所述第一控制信号，根据所述第一控制信号查找所述第一绑点电压的地址信息，之后生成指示所述第一绑点电压的地址信息的第一地址信号，并输出所述第一地址信号。所述第一绑点电压也是一种伽马参考电压，其用于产生所述第一伽马参考电压。本实施例中，优选的，伽马数据存储单元131中具体存储有所述第一绑点电压的显示查找表(Look-Up-Table，简称为LUT)信息。在其他实施例中，伽马数据存储单元131还可以用其他方式来存储所述第一绑点电压的地址信息。
伽马电压生成单元132与伽马数据存储单元131电连接，用于接收伽马数据存储单元131输出的所述第一地址信号，根据所述第一指示信号生成所述第一绑点电压。
分压单元133与伽马电压生成单元132电连接，用于对伽马电压生成单元132生成的所述第一绑点电压进行分压，以生成所述第一伽马参考电压。
由此，本实施例的驱动装置300，通过设置伽马电压生成电路100，伽马电压生成电路100中的图像侦测模块110侦测图像输入信号，并在确定所述图像输入信号指示的灰阶包括纯色灰阶时，向控制模块120发送第一侦测结果信号；控制模块120根据所述第一侦测结果信号生成第一控制信号，所述第一控 制信号用于控制伽马电压模块130生成第一伽马参考电压；而所述第一伽马参考电压对应的第一灰阶电压能够提升对像素单元的整体显示亮度贡献较高的R、G子像素的调整显示亮度、降低对所述整体显示亮度贡献较低的B子像素的调整显示亮度，从而提升了RGBW液晶面板的整体亮度表现。并且，通过降低B子像素的调整显示亮度，又进一步地达到了低蓝光护眼的作用，使得RGBW液晶面板具有低蓝光护眼的功能。
在本申请第二实施例中，与上述第一实施例不同的是，图像侦测模块110还用于，在确认所述图像输入信号指示的灰阶还包括非纯色灰阶时，生成并输出用于指示所述非纯色灰阶的第二侦测结果信号。相应的，控制模块120还用于接收图像侦测模块110输出的所述第二侦测结果信号，根据所述第二侦测结果信号生成并输出第二控制信号。伽马电压模块130还用于接收控制模块120输出的所述第二控制信号，根据所述第二控制信号生成第二伽马参考电压。所述第二伽马参考电压对应第二灰阶电压，所述第二灰阶电压使得加载所述第二灰阶电压的像素单元中的各个子像素单元的调整显示亮度分别等于各个子像素单元的初始显示亮度。即，当像素单元进行所述非纯色显示时，本实施例的伽马电压生成电路100生成的所述第二伽马参考电压，使得各个子像素的显示亮度按照Gamma 2.2曲线取值，而不将所述整体显示亮度在各个子像素间进行分配。
进一步的，在本实施例中，伽马数据存储单元131中还存储有第二绑点电压的地址信息。伽马数据存储单元131还用于接收控制模块120输出的所述第二控制信号，根据所述第二控制信号查找所述第二绑点电压的地址信息，之后生成指示所述第二绑点电压的地址信息的第二地址信号，并输出所述第二地址信号。所述第二绑点电压也是一种伽马参考电压，其用于产生所述第二伽马参考电压。本实施例中，优选的，伽马数据存储单元131中具体存储有所述第二绑点电压的显示查找表(Look-Up-Table，简称为LUT)信息。在其他实施例中，伽马数据存储单元131还可以用其他方式来存储所述第二绑点电压的地址信息。相应的，伽马电压生成单元132还用于接收伽马数据存储单元131输出的所述第二地址信号，根据所述第二地址信号生成所述第二绑点电压。分压单元133还用于对伽马电压生成单元132生成的所述第二绑点电压进行分压，以 生成所述第二伽马参考电压。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易的想到各种等效的修改或替换，这些修改或替换都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种伽马电压生成电路，其中，
    包括图像侦测模块、控制模块及伽马电压模块；
    所述图像侦测模块用于获取图像输入信号，并对所述图像输入信号进行侦测，在确定所述图像输入信号指示的灰阶包括纯色灰阶时，生成并输出用于指示所述纯色灰阶的第一侦测结果信号；
    所述控制模块与所述图像侦测模块电连接，用于接收所述图像侦测模块输出的所述第一侦测结果信号，根据所述第一侦测结果信号生成并输出第一控制信号；
    所述伽马电压模块与所述控制模块电连接，用于接收所述控制模块输出的所述第一控制信号，根据所述第一控制信号生成第一伽马参考电压，所述第一伽马参考电压对应第一灰阶电压，所述第一灰阶电压使得加载所述第一灰阶电压的像素单元中的红色子像素单元的调整显示亮度大于红色子像素单元的初始显示亮度、绿色子像素单元的调整显示亮度大于绿色子像素单元的初始显示亮度、蓝色子像素单元的调整显示亮度小于蓝色子像素单元的初始显示亮度。
  2. 根据权利要求1所述的伽马电压生成电路，其中，
    所述伽马电压模块包括伽马数据存储单元、伽马电压生成单元和分压单元；
    所述伽马数据存储单元与所述控制模块电连接，所述伽马数据存储单元中存储有第一绑点电压的地址信息，所述伽马数据存储单元用于接收所述控制模块输出的所述第一控制信号，根据所述第一控制信号查找所述第一绑点电压的地址信息，生成指示所述第一绑点电压的地址信息的第一地址信号，并输出所述第一地址信号；
    所述伽马电压生成单元与所述伽马数据存储单元电连接，用于接收所述伽马数据存储单元输出的所述第一地址信号，根据所述第一指示信号生成所述第一绑点电压；
    所述分压单元与所述伽马电压生成单元电连接，用于对所述伽马电压生成单元生成的所述第一绑点电压进行分压，以生成所述第一伽马参考电压。
  3. 根据权利要求2所述的伽马电压生成电路，其中，所述伽马数据存储 单元中具体存储有所述第一绑点电压的显示查找表信息。
  4. 根据权利要求1所述的伽马电压生成电路，其中，
    所述图像侦测模块还用于对所述图像输入信号进行侦测，并在确认所述图像输入信号指示的灰阶还包括非纯色灰阶时，生成并输出用于指示所述非纯色灰阶的第二侦测结果信号；
    其中，所述控制模块还用于接收所述图像侦测模块输出的所述第二侦测结果信号，根据所述第二侦测结果信号生成并输出第二控制信号；
    所述伽马电压模块还用于接收所述控制模块输出的所述第二控制信号，根据所述第二控制信号生成第二伽马参考电压，所述第二伽马参考电压对应第二灰阶电压，所述第二灰阶电压使得加载所述第二灰阶电压的像素单元中的各个子像素单元的调整显示亮度分别等于各个子像素单元的初始显示亮度。
  5. 根据权利要求4所述的伽马电压生成电路，其中，
    所述伽马电压模块包括伽马数据存储单元、伽马电压生成单元和分压单元；
    所述伽马数据存储单元与所述控制模块电连接，所述伽马数据存储单元中存储有第二绑点电压的地址信息，所述伽马数据存储单元用于接收所述控制模块输出的所述第二控制信号，根据所述第二控制信号查找所述第二绑点电压的地址信息，生成指示所述第二绑点电压的地址信息的第二地址信号，并输出所述第二地址信号；
    所述伽马电压生成单元与所述伽马数据存储单元电连接，用于接收所述伽马数据存储单元输出的所述第二地址信号，根据所述第二地址信号生成所述第二绑点电压；
    所述分压单元与所述伽马电压生成单元电连接，用于对所述伽马电压生成单元生成的所述第二绑点电压进行分压，以生成所述第二伽马参考电压。
  6. 一种驱动装置，其中，
    包括显示行缓冲器、电平转换器、数模转换器、缓冲放大器及权利要求1中所述的伽马电压生成电路；
    所述显示行缓冲器用于获取图像输入信号，对所述图像输入信号进行转换以生成并行图像数据信号，输出所述并行图像数据信号；
    所述电平转换器与所述显示行缓冲器电连接，用于接收所述显示行缓冲器 输出的所述并行图像数据信号，对所述并行图像数据信号进行电压放大并输出；
    所述数模转换器与所述电平转换器及所述伽马电压模块电连接，所述数模转换器用于获取经所述电平转换器电压放大后的所述并行图像数据信号，及所述伽马电压模块输出的所述第一伽马参考电压，根据电压放大后的所述并行图像数据信号与所述第一伽马参考电压生成第一灰阶电压，所述第一灰阶电压使得对应加载所述第一灰阶电压的像素单元中的红色子像素单元的调整显示亮度大于红色子像素单元的初始显示亮度、绿色子像素单元的调整显示亮度大于绿色子像素单元的初始显示亮度、蓝色子像素单元的调整显示亮度小于蓝色子像素单元的初始显示亮度；
    所述缓冲放大器与所述数模转换器电连接，所述缓冲放大器上加载所述数模转换器输出的所述第一灰阶电压，所述缓冲放大器对所述第一灰阶电压进行负载放大处理以生成并输出用于驱动像素单元的模拟信号。
  7. 根据权利要求6所述的驱动装置，其中，
    所述伽马电压模块包括伽马数据存储单元、伽马电压生成单元和分压单元；
    所述伽马数据存储单元与所述控制模块电连接，所述伽马数据存储单元中存储有第一绑点电压的地址信息，所述伽马数据存储单元用于接收所述控制模块输出的所述第一控制信号，根据所述第一控制信号查找所述第一绑点电压的地址信息，生成指示所述第一绑点电压的地址信息的第一地址信号，并输出所述第一地址信号；
    所述伽马电压生成单元与所述伽马数据存储单元电连接，用于接收所述伽马数据存储单元输出的所述第一地址信号，根据所述第一指示信号生成所述第一绑点电压；
    所述分压单元与所述伽马电压生成单元电连接，用于对所述伽马电压生成单元生成的所述第一绑点电压进行分压，以生成所述第一伽马参考电压。
  8. 根据权利要求7所述的驱动装置，其中，所述伽马数据存储单元中具体存储有所述第一绑点电压的显示查找表信息。
  9. 根据权利要求6所述的驱动装置，其中，
    所述图像侦测模块还用于对所述图像输入信号进行侦测，并在确认所述图像输入信号指示的灰阶还包括非纯色灰阶时，生成并输出用于指示所述非纯色 灰阶的第二侦测结果信号；
    其中，所述控制模块还用于接收所述图像侦测模块输出的所述第二侦测结果信号，根据所述第二侦测结果信号生成并输出第二控制信号；
    所述伽马电压模块还用于接收所述控制模块输出的所述第二控制信号，根据所述第二控制信号生成第二伽马参考电压，所述第二伽马参考电压对应第二灰阶电压，所述第二灰阶电压使得加载所述第二灰阶电压的像素单元中的各个子像素单元的调整显示亮度分别等于各个子像素单元的初始显示亮度。
  10. 根据权利要求9所述的驱动装置，其中，
    所述伽马电压模块包括伽马数据存储单元、伽马电压生成单元和分压单元；
    所述伽马数据存储单元与所述控制模块电连接，所述伽马数据存储单元中存储有第二绑点电压的地址信息，所述伽马数据存储单元用于接收所述控制模块输出的所述第二控制信号，根据所述第二控制信号查找所述第二绑点电压的地址信息，生成指示所述第二绑点电压的地址信息的第二地址信号，并输出所述第二地址信号；
    所述伽马电压生成单元与所述伽马数据存储单元电连接，用于接收所述伽马数据存储单元输出的所述第二地址信号，根据所述第二地址信号生成所述第二绑点电压；
    所述分压单元与所述伽马电压生成单元电连接，用于对所述伽马电压生成单元生成的所述第二绑点电压进行分压，以生成所述第二伽马参考电压。
PCT/CN2016/094462 2016-07-20 2016-08-10 伽马电压生成电路及驱动装置 Ceased WO2018014380A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/126,501 US10083663B2 (en) 2016-07-20 2016-08-10 Gamma voltage generation circuit and drive apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610579353.0A CN106023930B (zh) 2016-07-20 2016-07-20 伽马电压生成电路及驱动装置
CN201610579353.0 2016-07-20

Publications (1)

Publication Number Publication Date
WO2018014380A1 true WO2018014380A1 (zh) 2018-01-25

Family

ID=57117154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/094462 Ceased WO2018014380A1 (zh) 2016-07-20 2016-08-10 伽马电压生成电路及驱动装置

Country Status (3)

Country Link
US (1) US10083663B2 (zh)
CN (1) CN106023930B (zh)
WO (1) WO2018014380A1 (zh)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106454303B (zh) * 2016-10-27 2018-07-13 青岛海信电器股份有限公司 Rgbw图像处理方法及装置
CN107450212B (zh) * 2017-07-14 2020-07-24 厦门天马微电子有限公司 像素结构、像素驱动方法、色阻结构、显示面板及装置
CN107705746A (zh) * 2017-10-24 2018-02-16 惠科股份有限公司 一种显示装置的驱动装置和驱动方法
CN107886921B (zh) * 2017-12-05 2020-07-31 深圳市华星光电技术有限公司 源极驱动器及其实现多灰阶绑点电压组合的方法、驱动电路
CN108154857B (zh) * 2017-12-29 2019-12-13 深圳市华星光电半导体显示技术有限公司 伽马参考电压产生电路、液晶显示面板的驱动电路及方法
CN109064962A (zh) * 2018-08-31 2018-12-21 重庆惠科金渝光电科技有限公司 一种显示面板及其图像控制装置和方法
US11011095B2 (en) 2018-08-31 2021-05-18 Chongqing Hkc Optoelectronics Technology Co., Ltd. Display panel, and image control device and method thereof
CN110767138B (zh) * 2019-01-31 2020-12-04 昆山国显光电有限公司 显示面板的伽玛调节方法及调节装置、显示设备
WO2021232225A1 (zh) * 2020-05-19 2021-11-25 京东方科技集团股份有限公司 电源管理装置和显示设备
CN112951166B (zh) * 2021-03-31 2022-10-04 合肥维信诺科技有限公司 驱动ic、显示面板的驱动方法、显示面板及显示装置
CN114783343B (zh) * 2022-04-18 2024-05-07 Tcl华星光电技术有限公司 显示装置及电子设备
CN114913821B (zh) * 2022-05-31 2024-03-22 合肥京东方显示技术有限公司 显示模组及其控制方法、显示装置
TWI838051B (zh) * 2022-12-28 2024-04-01 大陸商北京集創北方科技股份有限公司 伽瑪調節模塊、顯示驅動晶片、顯示裝置以及資訊處理裝置
CN115938306B (zh) 2023-02-21 2023-10-27 惠科股份有限公司 伽马电压发生器、显示装置及显示面板的驱动方法
CN116434718A (zh) * 2023-04-27 2023-07-14 惠科股份有限公司 显示面板及其驱动方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060108615A1 (en) * 2004-11-23 2006-05-25 Ha Woo S Liquid crystal display apparatus and driving method thereof
CN101707050A (zh) * 2009-12-01 2010-05-12 福建华映显示科技有限公司 液晶显示装置的伽玛电压的选取方法及系统
CN202258265U (zh) * 2011-09-30 2012-05-30 北京京东方光电科技有限公司 伽马电压调节系统、驱动单元及液晶显示器
CN104732938A (zh) * 2015-03-27 2015-06-24 深圳市华星光电技术有限公司 一种液晶显示面板的驱动方法和驱动装置
CN105185331A (zh) * 2015-09-08 2015-12-23 深圳市华星光电技术有限公司 源极驱动电路、液晶显示面板及其驱动方法
CN105741812A (zh) * 2016-05-10 2016-07-06 京东方科技集团股份有限公司 一种液晶显示器的显示方法、液晶显示器及显示装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101537434B1 (ko) * 2011-09-19 2015-07-17 엘지디스플레이 주식회사 유기전계발광표시장치의 광학보상방법 및 구동방법
US9478174B2 (en) * 2014-01-03 2016-10-25 Pixtronix, Inc. Artifact mitigation for composite primary color transition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060108615A1 (en) * 2004-11-23 2006-05-25 Ha Woo S Liquid crystal display apparatus and driving method thereof
CN1783200A (zh) * 2004-11-23 2006-06-07 Lg.菲利浦Lcd株式会社 液晶显示装置及其驱动方法
CN101707050A (zh) * 2009-12-01 2010-05-12 福建华映显示科技有限公司 液晶显示装置的伽玛电压的选取方法及系统
CN202258265U (zh) * 2011-09-30 2012-05-30 北京京东方光电科技有限公司 伽马电压调节系统、驱动单元及液晶显示器
CN104732938A (zh) * 2015-03-27 2015-06-24 深圳市华星光电技术有限公司 一种液晶显示面板的驱动方法和驱动装置
CN105185331A (zh) * 2015-09-08 2015-12-23 深圳市华星光电技术有限公司 源极驱动电路、液晶显示面板及其驱动方法
CN105741812A (zh) * 2016-05-10 2016-07-06 京东方科技集团股份有限公司 一种液晶显示器的显示方法、液晶显示器及显示装置

Also Published As

Publication number Publication date
US10083663B2 (en) 2018-09-25
US20180197492A1 (en) 2018-07-12
CN106023930A (zh) 2016-10-12
CN106023930B (zh) 2018-10-23

Similar Documents

Publication Publication Date Title
WO2018014380A1 (zh) 伽马电压生成电路及驱动装置
US8427468B2 (en) Apparatus and method for driving mobile display device
US10127854B2 (en) Display driving method, apparatus and display device that generates ananalog power supply voltage for a source driver chip according to brightness of sub-pixels
US10152908B2 (en) Timing controller, display device, and method of driving the same
CN106652874B (zh) 组合像素的灰阶补偿装置、方法以及显示装置
CN101764924B (zh) 用于处理液晶显示设备的视频数据的方法和装置
US20150117774A1 (en) Apparatus and method for encoding image data
CN102314854B (zh) Lcd过激驱动方法及其装置
CN101855666A (zh) 偏移补正伽码(gamma)缓冲器及使用该缓冲器的灰阶电压产生电路
CN113808550B (zh) 可应用于在显示模块中进行亮度增强的设备
US20090153456A1 (en) Method for generating over-drive data
US20100295874A1 (en) Gamma voltage generation device for a flat panel display
CN104332143A (zh) 显示装置及其色彩转换方法
US20150213626A1 (en) Gamut mapping
TWI707336B (zh) 過驅動補償方法及其裝置
US9153188B2 (en) Driving apparatus of display with pre-charge mechanism
CN110113591B (zh) 白平衡调整系统
US8462181B2 (en) Driving method and display device capable of enhancing image brightness and reducing image distortion
US20130063474A1 (en) Multi-primary color lcd and color signal conversion device and method thereof
US8922596B2 (en) LCD overdriving method and device and LCD
US8009135B2 (en) Display and source driver thereof
US8125496B2 (en) Apparatus and method of converting image signal for four-color display device
US20070052633A1 (en) Display device
CN103839506A (zh) 显示装置及其驱动电路、显示面板的驱动方法与显示系统
KR20150135588A (ko) 로드 이펙트 보정 유닛, 이를 구비하는 표시 장치 및 로드 이펙트 보정 장치 및 이를 구비하는 표시 장치

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 15126501

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16909307

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16909307

Country of ref document: EP

Kind code of ref document: A1