WO2021103138A1 - 一种驱动电路及液晶显示装置 - Google Patents

一种驱动电路及液晶显示装置 Download PDF

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Publication number
WO2021103138A1
WO2021103138A1 PCT/CN2019/124385 CN2019124385W WO2021103138A1 WO 2021103138 A1 WO2021103138 A1 WO 2021103138A1 CN 2019124385 W CN2019124385 W CN 2019124385W WO 2021103138 A1 WO2021103138 A1 WO 2021103138A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
gamma voltage
chip
crystal driving
driving chip
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Application number
PCT/CN2019/124385
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English (en)
French (fr)
Inventor
刘金风
Original Assignee
Tcl华星光电技术有限公司
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Application filed by Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US16/627,304 priority Critical patent/US11404020B2/en
Publication of WO2021103138A1 publication Critical patent/WO2021103138A1/zh

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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
    • G09G3/3696—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
    • 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
    • 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
    • G09G3/2007—Display of intermediate tones
    • 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
    • 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
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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

Definitions

  • This application relates to the field of display technology, and in particular to a driving circuit and a liquid crystal display device.
  • Liquid Crystal Display as a common electronic device, is favored by users due to its low power consumption, small size, and light weight. With the consumption upgrade and technological development, the size of liquid crystal panels is getting larger and larger, so more and more liquid crystal driving chips need to be installed. At this time, the Gamma voltage generation module is required to transmit the generated Gamma voltage to each liquid crystal driver chip. However, because the distance between each liquid crystal driver chip and the Gamma voltage generation module is different, the voltage change and the Gamma voltage are caused in the process of Gamma voltage transmission. Problems such as large voltage drop, resulting in uneven display of the LCD panel.
  • the present application provides a driving circuit and a liquid crystal display device, which can solve the phenomenon of uneven display of a liquid crystal panel.
  • the present application provides a driving circuit for driving a liquid crystal panel, including:
  • Liquid crystal driving chip at least two of the liquid crystal driving chips are arranged in a one-dimensional array, the liquid crystal driving chip is used to receive the original Gamma voltage, and the liquid crystal driving chip is electrically connected to the pixel circuit in the display area of the liquid crystal panel ;
  • a timing control chip is electrically connected to the liquid crystal driving chip, and configured to receive the original Gamma voltage transmitted by the liquid crystal driving chip, and output the Gamma voltage correction parameter to the liquid crystal driving chip;
  • the liquid crystal drive chip compensates and corrects the original Gamma voltage according to the Gamma voltage correction parameter, so that the Gamma voltage value of each liquid crystal drive chip is the same, and the corrected Gamma voltage is used for transmission to the
  • the pixel circuit drives the liquid crystal panel to display.
  • each of the liquid crystal driving chips is electrically connected to the timing control chip through a P2P wire, and after each of the liquid crystal driving chips receives the original Gamma voltage, the original Gamma voltage is It is transmitted back to the timing control chip through the P2P conductor differential pair.
  • the timing control chip includes a Gamma voltage correction module, and the Gamma voltage correction module is used to compare the original Gamma voltages of the different liquid crystal driving chips received by the timing control chip Yes, and generate the Gamma voltage correction parameter.
  • the liquid crystal driving chip includes a Gamma voltage adjustment module, and the Gamma voltage adjustment module is configured to adjust and correct the original Gamma voltage according to the Gamma voltage correction parameter to form the Gamma voltage .
  • a chip array composed of at least two liquid crystal driving chips includes a proximal liquid crystal driving chip located in the middle area, and a remote liquid crystal driving chip located on both sides of the proximal liquid crystal driving chip, so The timing control chip is set corresponding to the position of the near-end liquid crystal driving chip.
  • the near-end liquid crystal driving chip is used to adjust the corresponding value of the original Gamma voltage to a lower value according to the Gamma voltage correction parameter, so that the near-end liquid crystal driving chip and the far-end The Gamma voltage values of the liquid crystal driving chip are the same.
  • the present application also provides a liquid crystal display device.
  • the liquid crystal display device includes a liquid crystal panel and the above-mentioned driving circuit, wherein the driving circuit is arranged on one side of the liquid crystal panel, and the The liquid crystal driving chip of the driving circuit is electrically connected with the signal line of the liquid crystal panel.
  • the liquid crystal panel includes a printed circuit board arranged in segments on one side of the liquid crystal panel, and the liquid crystal driving chip is arranged in a one-dimensional array on the segmented printed circuit board on.
  • the printed circuit board is provided with interface terminals, and the interface terminals of two adjacent printed circuit boards are electrically connected by a flexible circuit.
  • the application also provides a driving circuit for driving a liquid crystal panel, including:
  • Liquid crystal driving chip at least two of the liquid crystal driving chips are arranged in a one-dimensional array, the liquid crystal driving chip is used to receive the original Gamma voltage, and the liquid crystal driving chip is electrically connected to the pixel circuit in the display area of the liquid crystal panel ;
  • Gamma voltage generating module used to generate the original Gamma voltage, and used to output the original Gamma voltage to different liquid crystal driving chips;
  • a timing control chip is electrically connected to the liquid crystal driving chip, and configured to receive the original Gamma voltage transmitted by the liquid crystal driving chip, and output the Gamma voltage correction parameter to the liquid crystal driving chip;
  • the liquid crystal drive chip compensates and corrects the original Gamma voltage according to the Gamma voltage correction parameter, so that the Gamma voltage value of each liquid crystal drive chip is the same, and the corrected Gamma voltage is used for transmission to the
  • the pixel circuit drives the liquid crystal panel to display.
  • each of the liquid crystal driving chips is electrically connected to the timing control chip through a P2P wire, and after each of the liquid crystal driving chips receives the original Gamma voltage, the original Gamma voltage is It is transmitted back to the timing control chip through the P2P conductor differential pair.
  • the timing control chip includes a Gamma voltage correction module, and the Gamma voltage correction module is used to compare the original Gamma voltages of the different liquid crystal driving chips received by the timing control chip Yes, and generate the Gamma voltage correction parameter.
  • the liquid crystal driving chip includes a Gamma voltage adjustment module, and the Gamma voltage adjustment module is configured to adjust and correct the original Gamma voltage according to the Gamma voltage correction parameter to form the Gamma voltage .
  • a chip array composed of at least two liquid crystal driving chips includes a proximal liquid crystal driving chip located in the middle area, and a remote liquid crystal driving chip located on both sides of the proximal liquid crystal driving chip, so The timing control chip is set corresponding to the position of the near-end liquid crystal driving chip.
  • the near-end liquid crystal driving chip is used to adjust the corresponding value of the original Gamma voltage to a lower value according to the Gamma voltage correction parameter, so that the near-end liquid crystal driving chip and the far-end The Gamma voltage values of the liquid crystal driving chip are the same.
  • the driving circuit and the liquid crystal display device provided in this application are based on the feature of the P2P transmission protocol that can communicate in both directions.
  • the liquid crystal driving chip receives the original Gamma voltage, the voltage signal is transmitted back to the P2P differential pair.
  • the timing control chip the timing control chip outputs the voltage correction parameters to the LCD driver chip through the internal correction mechanism, the original Gamma voltage is adjusted and corrected inside the LCD driver chip, so that the Gamma voltage of each LCD driver chip can be adjusted to the same value, which can be effectively solved
  • Large-size liquid crystal panels have the problem of uneven display due to the large impedance of the flexible circuit (FPC line).
  • FIG. 1 is a schematic structural diagram of a liquid crystal display device provided by an embodiment of the application.
  • Fig. 2 is a schematic diagram of Gamma voltage adjustment of the driving circuit in Fig. 1;
  • FIG. 3 is a schematic structural diagram of a driving circuit provided by an embodiment of the application.
  • This application addresses the technical problems of the existing liquid crystal display device that the Gamma voltage changes during the transmission process and the Gamma voltage drop is large, which results in the uneven display of the liquid crystal panel. This embodiment can solve this defect.
  • the liquid crystal display device includes a liquid crystal panel 10 and a drive circuit 20, wherein the display area of the liquid crystal panel 10 is provided with a pixel circuit (not shown), and the drive circuit 20 is provided on one of the display areas of the liquid crystal panel 10. side.
  • the liquid crystal panel 10 includes a plurality of printed circuit boards 101 arranged in sections on one side of the liquid crystal panel 10, the plurality of printed circuit boards 101 are arranged in a one-dimensional array, and each of the printed circuit boards 101 Each is provided with interface terminals (not shown), and two adjacent printed circuit boards 101 are connected to the interface terminals through flexible circuits 102 to realize electrical connection between two adjacent printed circuit boards 101.
  • the driving circuit 20 includes a liquid crystal driving chip 201, a timing control chip 202 and a Gamma voltage generating module 203.
  • the Gamma voltage generating module 203 is electrically connected to the liquid crystal driving chip 201, and the Gamma voltage generating module 203 is used to generate an original Gamma voltage and transmit it to the liquid crystal driving chip 201.
  • the liquid crystal drive chip 201 is electrically connected to the pixel circuit in the display area of the liquid crystal panel 10, and is electrically connected to the timing control chip 202.
  • the liquid crystal drive chip 201 is used to transmit the original Gamma voltage to the
  • the timing control chip 202 transmits the received correction parameters of the original Gamma voltage to the liquid crystal drive chip 201, and the liquid crystal drive chip 201 corrects the original Gamma voltage, and the The liquid crystal driving chip 201 is used for transmitting the corrected Gamma voltage to the pixel circuit to drive the liquid crystal panel 10 for display.
  • liquid crystal display device of the present application will be described below in conjunction with specific embodiments.
  • At least one liquid crystal driving chip 201 is correspondingly provided on one of the printed circuit boards 101.
  • the printed circuit boards 101 For the convenience of description, only four of the printed circuit boards 101 are shown in FIG. Three liquid crystal driving chips 201 are mounted on the printed circuit board 101, and the actual manufacturing process is not limited to this.
  • At least two of the liquid crystal driving chips 201 are arranged on the segmented printed circuit board 101 in the form of a one-dimensional array.
  • a chip array composed of at least two of the liquid crystal driving chips 201 includes a proximal liquid crystal driving chip located in the middle area and a distal liquid crystal driving chip located on both sides of the proximal liquid crystal driving chip.
  • the liquid crystal driving chip 201 is sorted from right to left in order of (1) ⁇ (12), for example, the first liquid crystal driving chip 201(1) at the rightmost end, and so on, until the liquid crystal driving chip at the leftmost end 201(12).
  • liquid crystal driving chips 201 ((4) to (9)) on the middle two printed circuit boards 101 are used as the proximal liquid crystal driving chips, and the remaining liquid crystal driving chips 201 (( 1) ⁇ (3), (10) ⁇ (12)) are examples of the remote liquid crystal driving chip for illustration.
  • the timing control chip 202 and the Gamma voltage generating module 203 are arranged on the first circuit board 103 at positions corresponding to the proximal liquid crystal driving chip 201 ((4) to (9)).
  • the first circuit board 103 is arranged on a side of the printed circuit board 101 away from the liquid crystal panel 10, and the near-end liquid crystal drive chip 201 ((4) ⁇ (9)) corresponds to the printed circuit board At least one of 101 is electrically connected to the first circuit board 103 through the flexible circuit 102.
  • This application does not limit the material of the first circuit board 103, which can be a circuit board of the same material as the printed circuit board 101, or a flexible circuit board.
  • the number of the near-end liquid crystal driving chips and the number of the far-end liquid crystal driving chips in the present application may be divided according to the actual manufacturing process and the distance from the Gamma voltage generating module 203, and there is no limitation here.
  • the Gamma voltage generating module 203 is used to generate the original Gamma voltage, and is used to output the original Gamma voltage to different liquid crystal driving chips 201.
  • the Gamma voltage generating module 203 transmits the original Gamma voltage in two parts to the two printed circuit boards 101 through the two flexible circuits 102, and the two printed circuit boards 101 are The original Gamma voltage is input to the corresponding liquid crystal driving chip 201 from the middle to the two sides, respectively. That is to say, the original Gamma voltage is transmitted to the different liquid crystal driving chips 201 from the middle area to the two sides respectively.
  • the two printed circuit boards 101 connect signals through the flexible circuit 102, but because the flexible circuit 102 itself has impedance and the contact impedance of the interface terminal is superimposed, the total impedance can reach about 6 ohms.
  • the voltage drop of the Gamma voltage at both ends of the flexible circuit 102 the Gamma voltage changes, which causes the problem of uneven display of the picture.
  • this application electrically connects each of the liquid crystal driving chips 201 to the timing control chip 202 through P2P wires. After each of the liquid crystal driving chips 201 receives the original Gamma voltage, the original Gamma voltage is The Gamma voltage is transmitted back to the timing control chip 202 through the P2P wire differential pair, and this transmission method does not cause loss of voltage signals.
  • an electrical connection between the liquid crystal driving chip 201 and the timing control chip 202 is adopted through a P2P wire.
  • the Gamma voltage generation module 203 transmits the original Gamma voltage to the liquid crystal drive chip 201 ((1) ⁇ (12)).
  • the flexible circuit 102 itself The impedance and the superimposed contact impedance of the interface terminal cause the value of the original Gamma voltage transmitted to the different liquid crystal driving chips 201 ((1) to (12)) to change (different).
  • the liquid crystal driving chip 201 ((1) ⁇ (12)) receives the original Gamma voltage, it transmits the original Gamma voltage back to the timing control chip 202 through the P2P wire differential pair.
  • the timing control chip 202 includes a Gamma voltage correction module 202a, and the Gamma voltage correction module 202a is used to control the liquid crystal drive chip 201 according to the difference received by the timing control chip 202 ((1) ⁇ (12)) The original Gamma voltage is compared, and the Gamma voltage correction parameter is generated.
  • the timing control chip 202 then transmits the Gamma voltage correction parameter to the corresponding liquid crystal drive chip 201 ((1) ⁇ (12)) through the P2P wire.
  • the liquid crystal drive chip 201 (( 1) ⁇ (12))
  • the Gamma voltage adjustment module 201a is included inside, and the Gamma voltage adjustment module 201a is used to adjust and correct the original Gamma voltage according to the Gamma voltage correction parameter, and form a Gamma voltage after adjustment and correction.
  • the values of the Gamma voltages of the liquid crystal driving chips 201 ((1) to (12)) are all the same, and the corrected Gamma voltage is used to drive the liquid crystal panel for display.
  • the liquid crystal driving chips 201 ((1) to (12)) are electrically connected to signal lines (not shown) provided in the surface of the liquid crystal panel 10, and the signal lines include but are not limited to data lines.
  • the remote LCD driver chip 201 Since the longer the transmission distance of the original Gamma voltage, the greater the corresponding voltage drop, that is, the remote LCD driver chip 201 ((1) ⁇ (3), (10) ⁇ (12)) is affected by the voltage The influence of the drop is greater than that of the near-end liquid crystal driving chip 201 ((4) ⁇ (9)). Therefore, in this embodiment, according to the Gamma voltage correction parameter, the value of the original Gamma voltage corresponding to the near-end liquid crystal drive chip 201 ((4) ⁇ (9)) is lowered, and the far end is adjusted.
  • the value of the original Gamma voltage corresponding to the end liquid crystal driving chip 201 ((1) ⁇ (3), (10) ⁇ (12)) is adjusted higher, so that each liquid crystal driving chip 201 ((1) ⁇ (12) ))
  • the values of the Gamma voltages are the same, so the problem of uneven display of the liquid crystal panel 10 is solved.
  • the liquid crystal drive chip 201 sequentially lowers the values of the original Gamma voltages from the middle to the two ends, until the values of the original Gamma voltages are lower than those at the farthest end.
  • the value of the original Gamma voltage corresponding to the liquid crystal driving chip 201 remains the same.
  • the liquid crystal drive chip 201 sequentially increases the values of the original Gamma voltages from both ends to the middle, until it matches the closest liquid crystal driver.
  • the value of the original Gamma voltage corresponding to the chip 201 remains the same.
  • the Gamma voltage generating module 203 may be located on any of the printed circuit boards 101, and there is no limitation here. It can be understood that the different printed circuit boards 101 may be distributed at equal intervals, or may be distributed at non-equal intervals.
  • the present application also provides a driving circuit for driving a liquid crystal panel.
  • the driving circuit includes: a Gamma voltage generating module 203 for generating an original Gamma voltage and outputting the original Gamma voltage; Chip 201, the liquid crystal drive chip 201 is used to receive the original Gamma voltage, and transmit it back to the timing control chip 202 through the P2P transmission protocol differential pair; the timing control chip 202 is used to receive the transmission of different liquid crystal drive chips 201
  • the original Gamma voltage is compared with the original Gamma voltage of different liquid crystal drive chips 201 through the internal Gamma voltage correction module 202a, and the Gamma voltage correction parameters are generated, and the timing control chip 202 outputs the Gamma voltage correction parameters are sent to the liquid crystal drive chip 201; the Gamma voltage adjustment module 201a inside the liquid crystal drive chip 201 adjusts and corrects the original Gamma voltage according to the Gamma voltage correction parameter, and adjusts and corrects the Gamma voltage to form The Gamma voltage value of
  • this application conducts signal transmission based on the P2P transmission protocol, it can achieve "point-to-point" transmission, that is, it can be accurately matched during the two-way transmission of signals, and there will be no signal mistransmission, so the reliability of Gamma voltage adjustment can be guaranteed .

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

Abstract

一种驱动电路(20)及液晶显示装置，驱动电路(20)用于驱动液晶面板(10)，其包括：液晶驱动芯片(201)，用于接收原始Gamma电压；以及时序控制芯片(202)，用于接收液晶驱动芯片(201)传输的原始Gamma电压，并输出Gamma电压修正参数至液晶驱动芯片(201)；液晶驱动芯片(201)根据Gamma电压修正参数对原始Gamma电压做补偿修正，以使每个液晶驱动芯片(201)的Gamma电压数值相同。

Description

一种驱动电路及液晶显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种驱动电路及液晶显示装置。
 背景技术
液晶显示装置(Liquid Crystal Display ,LCD)作为一种常见的电子装置，由于其具有功耗低、体积小、质量轻等特点，而备受用户的青睐。伴随着消费升级以及技术发展，液晶面板尺寸越来越大，因此需要设置越来越多的液晶驱动芯片。此时就需要Gamma电压产生模块将产生的Gamma电压传递给各个液晶驱动芯片，但是由于各个液晶驱动芯片距Gamma电压产生模块的距离不同，因此在Gamma电压传递的过程中导致电压变化，以及Gamma电压压降较大等问题，从而导致液晶面板画面显示不均匀的现象。
因此，现有技术存在缺陷，急需改进。
 技术问题
本申请提供一种驱动电路及液晶显示装置，能够解决液晶面板画面显示不均匀的现象。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请提供一种驱动电路，用于驱动液晶面板，包括：
液晶驱动芯片，至少两所述液晶驱动芯片以一维阵列的形式排列，所述液晶驱动芯片用于接收原始Gamma电压，且所述液晶驱动芯片与所述液晶面板显示区内的像素电路电连接；
时序控制芯片，所述时序控制芯片与所述液晶驱动芯片电连接，用于接收所述液晶驱动芯片传输的所述原始Gamma电压，并输出Gamma电压修正参数至所述液晶驱动芯片；
所述液晶驱动芯片根据所述Gamma电压修正参数对所述原始Gamma电压做补偿修正，以使每个所述液晶驱动芯片的Gamma电压数值相同，所述修正后的Gamma电压用于传输至所述像素电路以驱动所述液晶面板进行显示。
在本申请的驱动电路中，每个所述液晶驱动芯片均通过P2P导线与所述时序控制芯片电连接，每个所述液晶驱动芯片接收到所述原始Gamma电压后，将所述原始Gamma电压通过所述P2P导线差分对传回至所述时序控制芯片。
在本申请的驱动电路中，所述时序控制芯片包括Gamma电压修正模块，所述Gamma电压修正模块用于根据所述时序控制芯片接收到的不同所述液晶驱动芯片的所述原始Gamma电压做比对，并产生所述Gamma电压修正参数。
在本申请的驱动电路中，所述液晶驱动芯片包括Gamma电压调节模块，所述Gamma电压调节模块用于根据所述Gamma电压修正参数对所述原始Gamma电压进行调节修正，以形成所述Gamma电压。
在本申请的驱动电路中，由至少两所述液晶驱动芯片组成的芯片阵列包括位于中部区域的近端液晶驱动芯片，以及位于所述近端液晶驱动芯片两侧的远端液晶驱动芯片，所述时序控制芯片对应所述近端液晶驱动芯片的位置设置。
在本申请的驱动电路中，所述近端液晶驱动芯片根据所述Gamma电压修正参数用以将对应的所述原始Gamma电压的数值调低，使得所述近端液晶驱动芯片与所述远端液晶驱动芯片的所述Gamma电压数值相同。
为解决上述技术问题，本申请还提供一种液晶显示装置，所述液晶显示装置包括液晶面板以及如上所述的驱动电路，其中，所述驱动电路设置于所述液晶面板的一侧，所述驱动电路的液晶驱动芯片与所述液晶面板的信号线电性连接。
在本申请的液晶显示装置中，所述液晶面板包括分段设置于所述液晶面板一侧的印刷电路板，所述液晶驱动芯片以一维阵列的形式排列于分段的所述印刷电路板上。
在本申请的液晶显示装置中，所述印刷电路板上设置有接口端子，相邻两所述印刷电路板的所述接口端子通过柔性线路电连接。
本申请还提供一种驱动电路，用于驱动液晶面板，包括：
液晶驱动芯片，至少两所述液晶驱动芯片以一维阵列的形式排列，所述液晶驱动芯片用于接收原始Gamma电压，且所述液晶驱动芯片与所述液晶面板显示区内的像素电路电连接；
Gamma电压产生模块，用于产生所述原始Gamma电压，并用于将所述原始Gamma电压输出至不同的所述液晶驱动芯片；
时序控制芯片，所述时序控制芯片与所述液晶驱动芯片电连接，用于接收所述液晶驱动芯片传输的所述原始Gamma电压，并输出Gamma电压修正参数至所述液晶驱动芯片；
所述液晶驱动芯片根据所述Gamma电压修正参数对所述原始Gamma电压做补偿修正，以使每个所述液晶驱动芯片的Gamma电压数值相同，所述修正后的Gamma电压用于传输至所述像素电路以驱动所述液晶面板进行显示。
在本申请的驱动电路中，每个所述液晶驱动芯片均通过P2P导线与所述时序控制芯片电连接，每个所述液晶驱动芯片接收到所述原始Gamma电压后，将所述原始Gamma电压通过所述P2P导线差分对传回至所述时序控制芯片。
在本申请的驱动电路中，所述时序控制芯片包括Gamma电压修正模块，所述Gamma电压修正模块用于根据所述时序控制芯片接收到的不同所述液晶驱动芯片的所述原始Gamma电压做比对，并产生所述Gamma电压修正参数。
在本申请的驱动电路中，所述液晶驱动芯片包括Gamma电压调节模块，所述Gamma电压调节模块用于根据所述Gamma电压修正参数对所述原始Gamma电压进行调节修正，以形成所述Gamma电压。
在本申请的驱动电路中，由至少两所述液晶驱动芯片组成的芯片阵列包括位于中部区域的近端液晶驱动芯片，以及位于所述近端液晶驱动芯片两侧的远端液晶驱动芯片，所述时序控制芯片对应所述近端液晶驱动芯片的位置设置。
在本申请的驱动电路中，所述近端液晶驱动芯片根据所述Gamma电压修正参数用以将对应的所述原始Gamma电压的数值调低，使得所述近端液晶驱动芯片与所述远端液晶驱动芯片的所述Gamma电压数值相同。
 有益效果
本申请的有益效果为：本申请提供的驱动电路及液晶显示装置，基于P2P传输协议可双向沟通的特点，在液晶驱动芯片接收到原始Gamma电压后，将该电压信号通过P2P差分对传回给时序控制芯片，时序控制芯片再通过内部修正机制输出电压修正参数至液晶驱动芯片，液晶驱动芯片内部对原始Gamma电压做调节修正，使每个液晶驱动芯片的Gamma电压调整到相同数值，可有效解决大尺寸液晶面板由于柔性线路（FPC线）阻抗大所带来的显示不均匀问题。
 附图说明
图1为本申请实施例提供的液晶显示装置的结构示意图；
图2为图1中驱动电路的Gamma电压调节示意图；
图3为本申请实施例提供的驱动电路的结构示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
本申请针对现有的液晶显示装置存在Gamma电压在传递的过程中出现变化以及Gamma电压压降较大等问题，从而导致液晶面板画面显示不均匀的技术问题，本实施例能够解决该缺陷。
如图1所示，为本申请实施例提供的液晶显示装置的结构示意图。所述液晶显示装置包括液晶面板10以及驱动电路20，其中，所述液晶面板10的显示区设置有像素电路（未图示），所述驱动电路20设置于所述液晶面板10显示区的一侧。所述液晶面板10包括分段设置于所述液晶面板10一侧的多个印刷电路板101，所述多个印刷电路板101以一维阵列的形式排列，每个所述印刷电路板101上均设置有接口端子（未图示），相邻两所述印刷电路板101之间通过柔性线路102与所述接口端子连接从而实现相邻两所述印刷电路板101的电连接。所述驱动电路20包括液晶驱动芯片201、时序控制芯片202以及Gamma电压产生模块203。
其中，所述Gamma电压产生模块203与所述液晶驱动芯片201电连接，所述Gamma电压产生模块203用于产生原始Gamma电压并传输至所述液晶驱动芯片201。所述液晶驱动芯片201与所述液晶面板10显示区内的像素电路电连接，并且与所述时序控制芯片202电连接，所述液晶驱动芯片201用于将所述原始Gamma电压传输至所述时序控制芯片202，所述时序控制芯片202将接收到的所述原始Gamma电压的修正参数传输至所述液晶驱动芯片201，所述液晶驱动芯片201对所述原始Gamma电压进行修正，且所述液晶驱动芯片201用于将修正后的Gamma电压传输至所述像素电路以驱动所述液晶面板10进行显示。
以下结合具体实施例对本申请的液晶显示装置进行阐述。
在一种实施例中，一所述印刷电路板101上至少对应设置一所述液晶驱动芯片201，为了方便描述，图1中仅展示了四个所述印刷电路板101，且每个所述印刷电路板101上搭载有三个所述液晶驱动芯片201，实际制程中并不以此为限。
至少两所述液晶驱动芯片201以一维阵列的形式排列于分段的所述印刷电路板101上。由至少两所述液晶驱动芯片201组成的芯片阵列包括位于中部区域的近端液晶驱动芯片和位于所述近端液晶驱动芯片两侧的远端液晶驱动芯片。为了方便描述，所述液晶驱动芯片201从右至左依次以(1)~(12)排序，如最右端第一个为液晶驱动芯片201(1)，依次类推，直至最左端的液晶驱动芯片201(12)。本实施例以中间的两个所述印刷电路板101上的所述液晶驱动芯片201((4)~(9))为所述近端液晶驱动芯片，其余的所述液晶驱动芯片201((1)~(3)、(10)~(12))为所述远端液晶驱动芯片为例进行说明。
其中，所述时序控制芯片202以及所述Gamma电压产生模块203对应所述近端液晶驱动芯片201((4)~(9))的位置设置于第一电路板103上。所述第一电路板103设置于所述印刷电路板101远离所述液晶面板10的一侧，所述近端液晶驱动芯片201((4)~(9))所对应的所述印刷电路板101中的至少一者通过所述柔性线路102与所述第一电路板103电连接。
本申请不对所述第一电路板103的材质做出限定，其可以为与所述印刷电路板101相同材质的电路板，也可以为柔性电路板。同时，本申请的所述近端液晶驱动芯片的数量和所述远端液晶驱动芯片的数量划分可依据实际制程以及距离所述Gamma电压产生模块203的远近而定，此处不做限制。
所述Gamma电压产生模块203用于产生原始Gamma电压，并用于将所述原始Gamma电压输出至不同的所述液晶驱动芯片201。本实施例中，所述Gamma电压产生模块203通过两个所述柔性线路102将所述原始Gamma电压分两部分传输至两个所述印刷电路板101上，两个所述印刷电路板101由中间向两侧将所述原始Gamma电压分别输入至相应的所述液晶驱动芯片201。也就是说所述原始Gamma电压是由中间区域分别向两侧传输至不同的所述液晶驱动芯片201上。
由于在两个所述印刷电路板101之间通过所述柔性线路102连接信号，但因为所述柔性线路102自身存在阻抗以及叠加所述接口端子的接触阻抗，总阻抗能达到6欧姆左右，以至于在所述柔性线路102两端的Gamma电压压降很大，造成Gamma电压变化，从而出现画面显示不均匀的问题。
本申请针对该问题，将每个所述液晶驱动芯片201均通过P2P导线与所述时序控制芯片202电连接，每个所述液晶驱动芯片201接收到所述原始Gamma电压后，将所述原始Gamma电压通过所述P2P导线差分对传回至所述时序控制芯片202，该传输方式不会对电压信号造成损耗。
在本实施例中，基于P2P传输协议可双向沟通的特点，采用在所述液晶驱动芯片201与所述时序控制芯片202之间通过P2P导线电连接。具体如图2所示，所述Gamma电压产生模块203将所述原始Gamma电压传输至所述液晶驱动芯片201((1)~(12))，该传输过程中由于所述柔性线路102自身的阻抗以及叠加所述接口端子的接触阻抗，造成传输至不同所述液晶驱动芯片201((1)~(12))的所述原始Gamma电压的数值发生了变化（不同）。所述液晶驱动芯片201((1)~(12))接收到所述原始Gamma电压后，将所述原始Gamma电压通过所述P2P导线差分对传回至所述时序控制芯片202。
其中，所述时序控制芯片202包括Gamma电压修正模块202a，所述Gamma电压修正模块202a用于根据所述时序控制芯片202接收到的不同所述液晶驱动芯片201((1)~(12))的所述原始Gamma电压做比对，并产生Gamma电压修正参数。
所述时序控制芯片202再将所述Gamma电压修正参数通过所述P2P导线传输至相应的所述液晶驱动芯片201((1)~(12))，本申请的所述液晶驱动芯片201((1)~(12))内部包括Gamma电压调节模块201a，所述Gamma电压调节模块201a用于根据所述Gamma电压修正参数对所述原始Gamma电压进行调节修正，调节修正后形成Gamma电压，且每个所述液晶驱动芯片201((1)~(12))的所述Gamma电压的数值均相同，所述修正后的Gamma电压用于驱动所述液晶面板进行显示。所述液晶驱动芯片201((1)~(12))与所述液晶面板10面内设置的信号线（未图示）电性连接，所述信号线包括但不限于数据线。
由于所述原始Gamma电压传输距离越远，相应受到电压降的影响越大，即所述远端液晶驱动芯片201((1)~(3)、(10)~(12))受到所述电压降的影响要大于所述近端液晶驱动芯片201((4)~(9))。因此，在本实施例中，根据所述Gamma电压修正参数将所述近端液晶驱动芯片201((4)~(9))对应的所述原始Gamma电压的数值调低，以及将所述远端液晶驱动芯片201((1)~(3)、(10)~(12)) 对应的所述原始Gamma电压的数值调高，使得每个所述液晶驱动芯片201((1)~(12))的所述Gamma电压的数值均相同，因此解决了所述液晶面板10出现画面显示不均匀的问题。
在另一种实施例中，根据所述Gamma电压修正参数，所述液晶驱动芯片201由中间向两端将各自对应的所述原始Gamma电压的数值依次调低，直至与最远端的所述液晶驱动芯片201所对应的所述原始Gamma电压的数值保持一致。
在另一种实施例中，根据所述Gamma电压修正参数，所述液晶驱动芯片201由两端向中间将各自对应的所述原始Gamma电压的数值依次调高，直至与最近端的所述液晶驱动芯片201所对应的所述原始Gamma电压的数值保持一致。
在其他实施例中，所述Gamma电压产生模块203可以位于任一所述印刷电路板101上，此处不做限制。可以理解的是，不同所述印刷电路板101之间可以等间距分布，也可以非等间距分布。
本申请还提供一种驱动电路，用于驱动液晶面板，如图3所示，所述驱动电路包括：Gamma电压产生模块203，用于产生原始Gamma电压，并输出所述原始Gamma电压；液晶驱动芯片201，所述液晶驱动芯片201用于接收所述原始Gamma电压，并通过P2P传输协议差分对传回至时序控制芯片202；所述时序控制芯片202用于接收不同所述液晶驱动芯片201传输的所述原始Gamma电压，并通过内部的Gamma电压修正模块202a对不同所述液晶驱动芯片201的所述原始Gamma电压做比对，并产生Gamma电压修正参数，所述时序控制芯片202输出所述Gamma电压修正参数至所述液晶驱动芯片201；所述液晶驱动芯片201内部的Gamma电压调节模块201a根据所述Gamma电压修正参数对所述原始Gamma电压进行调节修正，调节修正后形成Gamma电压，以使每个所述液晶驱动芯片201的Gamma电压数值相同，并根据所述Gamma电压得到Gamma电压驱动信号，所述Gamma电压驱动信号用于驱动所述液晶面板进行显示。
其中，所述驱动电路请具体参照上述液晶显示装置中的描述，此处不再赘述。另外，由于本申请基于P2P传输协议进行信号传导，因此能够实现“点对点”的传输，即在信号双向传输的过程中能够精准匹配，不会发生信号误传，因此能够保证Gamma电压调节的可靠性。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (15)

  1. 一种驱动电路，用于驱动液晶面板，其包括：
    液晶驱动芯片，至少两所述液晶驱动芯片以一维阵列的形式排列，所述液晶驱动芯片用于接收原始Gamma电压，且所述液晶驱动芯片与所述液晶面板显示区内的像素电路电连接；
    时序控制芯片，所述时序控制芯片与所述液晶驱动芯片电连接，用于接收所述液晶驱动芯片传输的所述原始Gamma电压，并输出Gamma电压修正参数至所述液晶驱动芯片；
    所述液晶驱动芯片根据所述Gamma电压修正参数对所述原始Gamma电压做补偿修正，以使每个所述液晶驱动芯片的Gamma电压数值相同，所述修正后的Gamma电压用于传输至所述像素电路以驱动所述液晶面板进行显示。
  2. 根据权利要求1所述的驱动电路，其中，每个所述液晶驱动芯片均通过P2P导线与所述时序控制芯片电连接，每个所述液晶驱动芯片接收到所述原始Gamma电压后，将所述原始Gamma电压通过所述P2P导线差分对传回至所述时序控制芯片。
  3. 根据权利要求2所述的驱动电路，其中，所述时序控制芯片包括Gamma电压修正模块，所述Gamma电压修正模块用于根据所述时序控制芯片接收到的不同所述液晶驱动芯片的所述原始Gamma电压做比对，并产生所述Gamma电压修正参数。
  4. 根据权利要求1所述的驱动电路，其中，所述液晶驱动芯片包括Gamma电压调节模块，所述Gamma电压调节模块用于根据所述Gamma电压修正参数对所述原始Gamma电压进行调节修正，以形成所述修正后的Gamma电压。
  5. 根据权利要求1所述的驱动电路，其中，由至少两所述液晶驱动芯片组成的芯片阵列包括位于中部区域的近端液晶驱动芯片，以及位于所述近端液晶驱动芯片两侧的远端液晶驱动芯片，所述时序控制芯片对应所述近端液晶驱动芯片的位置设置。
  6. 根据权利要求5所述的驱动电路，其中，所述近端液晶驱动芯片根据所述Gamma电压修正参数用以将对应的所述原始Gamma电压的数值调低，使得所述近端液晶驱动芯片与所述远端液晶驱动芯片的所述Gamma电压数值相同。
  7. 一种液晶显示装置，其中，所述液晶显示装置包括液晶面板以及如权利要求1所述的驱动电路，其中，所述驱动电路设置于所述液晶面板的一侧，所述驱动电路的液晶驱动芯片与所述液晶面板的信号线电性连接。
  8. 根据权利要求7所述的液晶显示装置，其中，所述液晶面板包括分段设置于所述液晶面板一侧的印刷电路板，所述液晶驱动芯片以一维阵列的形式排列于分段的所述印刷电路板上。
  9. 根据权利要求8所述的液晶显示装置，其中，所述印刷电路板上设置有接口端子，相邻两所述印刷电路板的所述接口端子通过柔性线路电连接。
  10. 一种驱动电路，用于驱动液晶面板，其包括：
    液晶驱动芯片，至少两所述液晶驱动芯片以一维阵列的形式排列，所述液晶驱动芯片用于接收原始Gamma电压，且所述液晶驱动芯片与所述液晶面板显示区内的像素电路电连接；
    Gamma电压产生模块，用于产生所述原始Gamma电压，并用于将所述原始Gamma电压输出至不同的所述液晶驱动芯片；
    时序控制芯片，所述时序控制芯片与所述液晶驱动芯片电连接，用于接收所述液晶驱动芯片传输的所述原始Gamma电压，并输出Gamma电压修正参数至所述液晶驱动芯片；
    所述液晶驱动芯片根据所述Gamma电压修正参数对所述原始Gamma电压做补偿修正，以使每个所述液晶驱动芯片的Gamma电压数值相同，所述修正后的Gamma电压用于传输至所述像素电路以驱动所述液晶面板进行显示。
  11. 根据权利要求10所述的驱动电路，其中，每个所述液晶驱动芯片均通过P2P导线与所述时序控制芯片电连接，每个所述液晶驱动芯片接收到所述原始Gamma电压后，将所述原始Gamma电压通过所述P2P导线差分对传回至所述时序控制芯片。
  12. 根据权利要求11所述的驱动电路，其中，所述时序控制芯片包括Gamma电压修正模块，所述Gamma电压修正模块用于根据所述时序控制芯片接收到的不同所述液晶驱动芯片的所述原始Gamma电压做比对，并产生所述Gamma电压修正参数。
  13. 根据权利要求10所述的驱动电路，其中，所述液晶驱动芯片包括Gamma电压调节模块，所述Gamma电压调节模块用于根据所述Gamma电压修正参数对所述原始Gamma电压进行调节修正，以形成所述修正后的Gamma电压。
  14. 根据权利要求10所述的驱动电路，其中，由至少两所述液晶驱动芯片组成的芯片阵列包括位于中部区域的近端液晶驱动芯片，以及位于所述近端液晶驱动芯片两侧的远端液晶驱动芯片，所述时序控制芯片对应所述近端液晶驱动芯片的位置设置。
  15. 根据权利要求14所述的驱动电路，其中，所述近端液晶驱动芯片根据所述Gamma电压修正参数用以将对应的所述原始Gamma电压的数值调低，使得所述近端液晶驱动芯片与所述远端液晶驱动芯片的所述Gamma电压数值相同。
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