WO2017190427A1 - 液晶面板的色温调整装置、方法及液晶面板 - Google Patents

液晶面板的色温调整装置、方法及液晶面板 Download PDF

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Publication number
WO2017190427A1
WO2017190427A1 PCT/CN2016/089744 CN2016089744W WO2017190427A1 WO 2017190427 A1 WO2017190427 A1 WO 2017190427A1 CN 2016089744 W CN2016089744 W CN 2016089744W WO 2017190427 A1 WO2017190427 A1 WO 2017190427A1
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Prior art keywords
light emitting
emitting diode
color temperature
liquid crystal
crystal panel
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PCT/CN2016/089744
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English (en)
French (fr)
Inventor
周锦杰
白宇杰
郭星灵
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深圳市华星光电技术有限公司
武汉华星光电技术有限公司
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Priority to US15/310,680 priority Critical patent/US20180196309A1/en
Publication of WO2017190427A1 publication Critical patent/WO2017190427A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/24—Controlling the colour of the light using electrical feedback from LEDs or from LED modules
    • 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
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

Definitions

  • the present disclosure belongs to the technical field of liquid crystal displays, and more particularly to a color temperature adjusting device, a method, and a liquid crystal panel of a liquid crystal panel.
  • the liquid crystal panel of the existing three-color liquid crystal display includes a plurality of pixels, and each pixel includes three sub-pixels, that is, a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel.
  • R red
  • G green
  • B blue
  • a four-color liquid crystal display has appeared, and each pixel of the liquid crystal panel of the four-color liquid crystal display includes four sub-pixels, in addition to the above three sub-pixels, white (W) sub-pixels are added.
  • the screen displayed by the LCD after the addition of the W sub-pixel will be brighter, and the color of the displayed image will be more vivid.
  • the color coordinates of the produced liquid crystal panel may drift, but the drift cannot be corrected, and the color temperature corresponds to the color coordinates. Therefore, it is necessary to provide a color temperature adjusting device and method for the liquid crystal panel so that Correct the drift of color coordinates by adjusting the color temperature.
  • exemplary embodiments of the present disclosure provide a method and apparatus that can adjust the color temperature of a liquid crystal panel.
  • a color temperature adjusting device for a liquid crystal panel
  • the color temperature adjusting device may include: a sensing unit that senses a color temperature of the liquid crystal panel; and a control unit that generates a control based on the sensed color temperature a signal; a backlight integrated circuit that adjusts a driving current of a backlight unit for driving the liquid crystal panel based on the control signal.
  • control unit may include: a comparison module that compares the difference between the sensed color temperature and the predetermined color temperature with a threshold; and the signal generation module generates a control signal when the difference is greater than the threshold.
  • the signal generating module may generate a control signal for reducing the driving current; when the difference is greater than the threshold and the difference is a negative number, the signal generating module may generate In order to increase the control signal of the drive current.
  • the color temperature adjustment device may further include: a communication unit that communicates with the external device.
  • the backlight unit may include at least one set of light emitting diodes, each set of the light emitting diodes comprises a first light emitting diode arranged in two columns, a second light emitting diode, a third light emitting diode and a fourth light emitting diode, the first light emitting diode and the first The two light emitting diodes are sequentially arranged in the first column, the third light emitting diode and the fourth light emitting diode are sequentially arranged in the second column, the negative electrode of the fourth light emitting diode is connected to the positive pole of the first light emitting diode, and the negative electrode of the second light emitting diode is connected. To the anode of the third LED.
  • a color temperature adjustment method of a liquid crystal panel may include: (A) sensing a color temperature of the liquid crystal panel; (B) generating a control based on the sensed color temperature a signal; (C) adjusting a driving current for driving the backlight unit of the liquid crystal panel based on the control signal.
  • the step of generating a control signal based on the sensed color temperature may include comparing a difference between the sensed color temperature and the predetermined color temperature to a threshold; and generating a control signal when the difference is greater than the threshold.
  • a control signal for reducing the driving current may be generated; when the difference is greater than the threshold and the difference is a negative number, a driving current for increasing the driving current may be generated. control signal.
  • the backlight unit may include at least one set of light emitting diodes, each set of the light emitting diodes comprises a first light emitting diode arranged in two columns, a second light emitting diode, a third light emitting diode and a fourth light emitting diode, the first light emitting diode and the first The two light emitting diodes are sequentially arranged in the first column, the third light emitting diode and the fourth light emitting diode are sequentially arranged in the second column, the negative electrode of the fourth light emitting diode is connected to the positive pole of the first light emitting diode, and the negative electrode of the second light emitting diode is connected. To the anode of the third LED.
  • a liquid crystal panel which may include the backlight unit described above.
  • the color temperature of the liquid crystal panel can be adjusted to correct the drift of the color coordinates, improve the performance of the liquid crystal panel, and optimize the display effect of the liquid crystal panel.
  • FIG. 1 illustrates a block diagram of a color temperature adjusting device of a liquid crystal panel according to an embodiment of the present disclosure
  • FIG. 2 illustrates a schematic diagram of a backlight unit in accordance with an embodiment of the present disclosure
  • FIG. 3 illustrates a schematic diagram of a backlight unit in accordance with another embodiment of the present disclosure
  • FIG. 4 illustrates a flow chart of a color temperature adjustment method of a liquid crystal panel according to an embodiment of the present disclosure.
  • the liquid crystal panel referred to herein includes a plurality of pixels, each of which includes a plurality of sub-pixels (for example, three sub-pixels or four sub-pixels). That is, the present disclosure can be applied to a three-color liquid crystal display, a four-color liquid crystal display, or a liquid crystal display of more colors.
  • FIG. 1 illustrates a block diagram of a color temperature adjusting device of a liquid crystal panel according to an embodiment of the present disclosure.
  • the liquid crystal panel includes a substrate and a backlight unit (BLU).
  • the backlight unit includes a plurality of light emitting diodes (LEDs) or organic light emitting diodes (OLEDs) to illuminate the substrate for display by the liquid crystal panel.
  • LEDs light emitting diodes
  • OLEDs organic light emitting diodes
  • a color temperature adjusting device includes a sensing unit 101, a control unit 102, and a backlight integrated circuit (IC) 103.
  • IC backlight integrated circuit
  • the sensing unit 101 is configured to sense a color temperature of the liquid crystal panel.
  • the sensing unit 101 may be a color temperature meter or a color temperature meter, and can measure light emitted when the liquid crystal panel is displayed.
  • Control unit 102 is operative to generate a control signal based on the sensed color temperature.
  • Control unit 102 can be a single core, dual core or more core processor.
  • the control unit 102 can include a comparison module for comparing a difference between the sensed color temperature and the predetermined color temperature with a threshold value, and a signal generating module configured to generate a control signal when the difference is greater than the threshold.
  • the control signal can be a pulse width modulated (PWM) signal.
  • the signal generation module when the difference is greater than the threshold and the difference is a positive number, the signal generation module generates a control signal for reducing the drive current; when the difference is greater than the threshold and the difference is a negative number, the signal generation module generates for increasing Control signal for driving current.
  • the backlight integrated circuit 103 is for adjusting a driving current for driving the backlight unit 104 of the liquid crystal panel based on a control signal.
  • the backlight integrated circuit 103 can be independent of the liquid crystal panel, or can be a backlight integrated circuit integrated into the liquid crystal panel.
  • the backlight integrated circuit 103 employs a backlight integrated circuit integrated into a liquid crystal panel.
  • the liquid crystal panel includes a memory.
  • the backlight unit of the liquid crystal panel can be adjusted using the color temperature adjusting device of the embodiment of the present disclosure.
  • the driving current is adjusted by the control signal until the difference is less than or equal to the threshold.
  • the memory of the liquid crystal panel can store the drive current when the difference is less than or equal to the threshold.
  • the driving current stored in the memory can be utilized to drive the backlight unit of the liquid crystal panel.
  • the backlight integrated circuit 103 employs a backlight integrated circuit that is independent of the liquid crystal panel.
  • the liquid crystal panel includes its own backlight integrated circuit and memory, and the color temperature adjusting device may include a communication unit.
  • the backlight unit of the liquid crystal panel can be adjusted using the color temperature adjusting device of the embodiment of the present disclosure.
  • the driving current is adjusted by the control signal until the difference is less than or equal to the threshold.
  • the driving current can be transmitted to the liquid crystal panel through the communication unit, and the memory of the liquid crystal panel stores the driving current.
  • the backlight unit of the liquid crystal panel can be driven by the backlight integrated circuit of the liquid crystal panel itself using the driving current stored in the memory.
  • the communication unit of the color temperature adjustment device is also used to communicate with an external device (for example, a personal computer (PC) or the like).
  • an external device for example, a personal computer (PC) or the like.
  • FIG. 2 illustrates a schematic diagram of a backlight unit in accordance with an embodiment of the present disclosure.
  • the backlight unit includes at least one input terminal 205 and at least two output terminals 206 and 207, at least two of which are arranged between the input terminal 205 and the two output terminals 206, 207.
  • the first light emitting diode 201, the second light emitting diode 202, the third light emitting diode 203 and the fourth light emitting diode 204 are arranged in the first column, and the third light emitting diode 203 is arranged in sequence.
  • the fourth light emitting diode 204 is sequentially arranged in the second column, the negative electrode of the fourth light emitting diode 204 is connected to the positive electrode of the first light emitting diode 201, the negative electrode of the second light emitting diode 202 is connected to the positive electrode of the third light emitting diode 203, and the second The anode of the LED 202 and the anode of the fourth LED 204 are connected to the input terminal 205, and the cathode of the first LED 201 and the cathode of the third LED 203 are connected to the output 206 and the output 207, respectively.
  • the above four light emitting diodes form a set of light emitting diodes
  • the backlight unit may include at least one (preferably, two or three sets) of light emitting diodes.
  • An embodiment of a backlight unit comprising two sets of such light emitting diodes is shown in FIG.
  • output 206 and output 207 can be coupled to backlight integrated circuit 103 of FIG.
  • the light emitting diodes of the backlight unit can also be arranged in three or more columns, one for each column.
  • the backlight integrated circuit 103 controls the series of light emitting diodes through the output terminal.
  • FIG. 3 illustrates a schematic diagram of a backlight unit in accordance with another embodiment of the present disclosure.
  • a light emitting diode 301 to a light emitting diode 308 are disposed between the input terminal 309 and the two output terminals 310 and 311.
  • the light emitting diode 304, the light emitting diode 307, the light emitting diode 302, and the light emitting diode 305 are connected in series.
  • the light emitting diode 308, the light emitting diode 303, the light emitting diode 306, and the light emitting diode 301 are connected in series.
  • each of the light emitting diodes of the backlight unit may be a light emitting diode of the same or different specifications.
  • the light emitting diodes are arranged in a crossed configuration, and the spacing between adjacent light emitting diodes is larger than that of a structure in which light emitting diodes in the same column are connected in series.
  • the area of the affected liquid crystal panel is larger, which is more beneficial for the adjustment of the color temperature of the liquid crystal panel.
  • FIG. 4 illustrates a flow chart of a color temperature adjustment method of a liquid crystal panel according to an embodiment of the present disclosure.
  • step S401 the color temperature of the liquid crystal panel is sensed.
  • Can pass color temperature meter or color temperature meter It is possible to measure the light emitted when the liquid crystal panel is displayed.
  • a control signal is generated based on the sensed color temperature.
  • the step of generating a control signal based on the sensed color temperature includes comparing a difference between the sensed color temperature and a predetermined color temperature to a threshold; and generating a control signal when the difference is greater than the threshold.
  • the control signal can be a pulse width modulated signal.
  • a control signal for reducing the drive current may be generated; when the difference is greater than the threshold and the difference is a negative number, control for increasing the drive current may be generated signal.
  • step S403 the driving current for driving the backlight unit of the liquid crystal panel is adjusted based on the control signal.
  • the backlight unit may be the backlight unit described in the above embodiment.
  • liquid crystal panel that can include the backlight unit described in the above embodiments.
  • the above method according to the present disclosure may be embodied as computer code in a computer readable recording medium.
  • the computer code can be implemented by those skilled in the art in accordance with the description of the above method.
  • the above method of the present disclosure is implemented when the computer code is executed in a computer.
  • each unit in the color temperature adjusting device of the liquid crystal panel may be implemented as a hardware component.
  • Those skilled in the art can implement the various units using, for example, a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC), depending on the processing performed by the various defined units.
  • FPGA Field Programmable Gate Array
  • ASIC Application Specific Integrated Circuit

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Abstract

一种液晶面板的色温调整装置、方法及液晶面板，能够修正色坐标的漂移。色温调整装置可包括：感测单元（101），感测液晶面板的色温；控制单元（102），基于感测到的色温来产生控制信号；背光集成电路（103），基于控制信号来调整用于驱动液晶面板的背光单元（104）的驱动电流。

Description

液晶面板的色温调整装置、方法及液晶面板 技术领域
本公开属于液晶显示器技术领域，更具体地说，涉及一种液晶面板的色温调整装置、方法及液晶面板。
背景技术
现有的三色液晶显示器的液晶面板包括多个像素，每个像素包括三个子像素，即红色(R)子像素、绿色(G)子像素和蓝色(B)子像素。随着技术的发展，又出现了四色液晶显示器，四色液晶显示器的液晶面板的每个像素包括四个子像素，除了上述三个子像素之外，还增加了白色(W)子像素。增加了W子像素之后的液晶显示器显示的画面会更亮，显示的图像的颜色会更加鲜艳。在产品出厂前，需要测量液晶面板的色域、色温和色坐标等参数。生产出来的液晶面板的色坐标(例如，白色的色坐标)可能会产生漂移，但是无法修正这样的漂移，而色温与色坐标相对应，因此，需要提供液晶面板的色温调整装置、方法，以便通过调整色温来修正色坐标的漂移。
发明内容
为克服现有技术的不足，本公开的示例性实施例提供一种可调整液晶面板的色温的方法和装置。
根据本公开的实施例的一方面提供一种液晶面板的色温调整装置，所述色温调整装置可包括：感测单元，感测液晶面板的色温；控制单元，基于感测到的色温来产生控制信号；背光集成电路，基于控制信号来调整用于驱动液晶面板的背光单元的驱动电流。
可选地，控制单元可包括：比较模块，将感测到的色温和预定色温之间的差值与阈值进行比较；信号产生模块，当差值大于阈值时产生控制信号。
可选地，当差值大于阈值并且差值为正数时，信号产生模块可产生用于减小驱动电流的控制信号；当差值大于阈值并且差值为负数时，信号产生模块可产生用于增大驱动电流的控制信号。
可选地，所述色温调整装置还可包括：通信单元，与外部装置通信。
可选地，背光单元可包括至少一组发光二极管，每组发光二极管包括排成两列的第一发光二极管、第二发光二极管、第三发光二极管和第四发光二极管，第一发光二极管和第二发光二极管依次排列在第一列中，第三发光二极管和第四发光二极管依次排列在第二列中，第四发光二极管的负极连接到第一发光二极管的正极，第二发光二极管的负极连接到第三发光二极管的正极。
根据本公开的实施例的另一方面提供一种液晶面板的色温调整方法，所述色温调整方法可包括：(A)感测液晶面板的色温；(B)基于感测到的色温来产生控制信号；(C)基于控制信号来调整用于驱动液晶面板的背光单元的驱动电流。
可选地，基于感测到的色温来产生控制信号的步骤可包括：将感测到的色温和预定色温之间的差值与阈值进行比较；当差值大于阈值时产生控制信号。
可选地，当差值大于阈值并且差值为正数时，可产生用于减小驱动电流的控制信号；当差值大于阈值并且差值为负数时，可产生用于增大驱动电流的控制信号。
可选地，背光单元可包括至少一组发光二极管，每组发光二极管包括排成两列的第一发光二极管、第二发光二极管、第三发光二极管和第四发光二极管，第一发光二极管和第二发光二极管依次排列在第一列中，第三发光二极管和第四发光二极管依次排列在第二列中，第四发光二极管的负极连接到第一发光二极管的正极，第二发光二极管的负极连接到第三发光二极管的正极。
根据本公开的实施例的另一方面提供一种液晶面板，所述液晶面板可包括上述背光单元。
根据本公开的示例性实施例提供的方法及装置，可通过调整液晶面板的色温来修正色坐标的漂移，提升液晶面板的性能，优化液晶面板的显示效果。
将在接下来的描述中部分阐述本公开的其它方面和/或优点，还有一部分通过描述将是清楚的，或者可以经过本公开的实施而得知。
附图说明
通过下面结合附图进行的对实施例的描述，本公开的上述和/或其它目的和优点将会变得更加清楚，其中：
图1示出根据本公开的实施例的液晶面板的色温调整装置的框图；
图2示出根据本公开的实施例的背光单元的示意图；
图3示出根据本公开的另一实施例的背光单元的示意图；
图4示出根据本公开的实施例的液晶面板的色温调整方法的流程图。
具体实施方式
现将详细描述本公开的示例性实施例，所述实施例的示例在附图中示出，其中，相同的标号指示相同的部分。以下将通过参照附图来说明所述实施例，以便解释本公开。
应予说明，这里所说的液晶面板包括多个像素，每一个像素包括多个子像素(例如，三个子像素或四个子像素)。也就是说，本公开可应用于三色液晶显示器、四色液晶显示器或更多色的液晶显示器。
图1示出根据本公开的实施例的液晶面板的色温调整装置的框图。在本实施例中，液晶面板包括基板和背光单元(BLU)。背光单元包括多个发光二极管(LED)或有机发光二极管(OLED)，以便将光照射到基板，供液晶面板进行显示。这里，以发光二极管作为示例进行描述。
如图1所示，根据本公开的实施例的色温调整装置包括：感测单元101、控制单元102和背光集成电路(IC)103。
感测单元101用于感测液晶面板的色温。感测单元101可以是色温表或色温仪，可对液晶面板进行显示时发出的光进行测量。
控制单元102用于基于感测到的色温来产生控制信号。控制单元102可以是单核、双核或更多核的处理器。控制单元102可包括：比较模块，用于将感测到的色温和预定色温之间的差值与阈值进行比较；信号产生模块，用于当差值大于阈值时产生控制信号。控制信号可以是脉冲宽度调制(PWM)信号。
作为示例，当差值大于阈值并且差值为正数时，信号产生模块产生用于减小驱动电流的控制信号；当差值大于阈值并且差值为负数时，信号产生模块产生用于增大驱动电流的控制信号。
背光集成电路103用于基于控制信号来调整用于驱动液晶面板的背光单元104的驱动电流。背光集成电路103可独立于液晶面板，也可采用整合到液晶面板中的背光集成电路。
作为示例，背光集成电路103采用整合到液晶面板中的背光集成电路。在这种情况下，液晶面板包括存储器。可使用本公开的实施例的色温调整装置来调整液晶面板的背光单元。当感测单元感测到的色温和预定色温之间的差值大于阈值时，通过控制信号来调整驱动电流，直到所述差值小于等于阈值。液晶面板的存储器可存储所述差值小于等于阈值时的驱动电流。当操作液晶面板(例如，启动液晶面板)时，可利用存储器中存储的驱动电流来驱动液晶面板的背光单元。
作为示例，背光集成电路103采用独立于液晶面板的背光集成电路。在这种情况下，液晶面板包括自身的背光集成电路和存储器，色温调整装置可包括通信单元。可使用本公开的实施例的色温调整装置来调整液晶面板的背光单元。当感测单元感测到的色温和预定色温之间的差值大于阈值时，通过控制信号来调整驱动电流，直到所述差值小于等于阈值。当所述差值小于等于阈值时，可通过通信单元将驱动电流发送到液晶面板，液晶面板的存储器存储驱动电流。当操作液晶面板(例如，启动液晶面板)时，可由液晶面板自身的背光集成电路利用存储器中存储的驱动电流来驱动液晶面板的背光单元。
作为示例，色温调整装置的通信单元还用于与外部装置(例如，个人计算机(PC)等)通信。
图2示出根据本公开的实施例的背光单元的示意图。
如图2所示，根据示例性实施例的背光单元包括至少一个输入端205和至少两个输出端206和207，在输入端205和两个输出端206、207之间至少设置有排成两列的第一发光二极管201、第二发光二极管202、第三发光二极管203和第四发光二极管204，第一发光二极管201和第二发光二极管202依次排列在第一列中，第三发光二极管203和第四发光二极管204依次排列在第二列中，第四发光二极管204的负极连接到第一发光二极管201的正极，第二发光二极管202的负极连接到第三发光二极管203的正极，第二发光二极管202的正极和第四发光二极管204的正极与输入端205连接，第一发光二极管201的负极和第三发光二极管203的负极分别与输出端206和输出端207连接。
作为示例，上述四个发光二极管形成一组发光二极管，根据示例性实施例的背光单元可包括至少一组(优选为，二组或三组)发光二极管。包括二组这样的发光二极管的背光单元的实施例在图3中示出。
作为示例，输出端206和输出端207可与图1中的背光集成电路103连接。背光单元的发光二极管也可排列成三列或更多列，每列对应一个输出端。背光集成电路103通过输出端控制串联的发光二极管。
图3示出根据本公开的另一实施例的背光单元的示意图。
如图3所示，输入端309和两个输出端310和311之间设置发光二极管301至发光二极管308。发光二极管304、发光二极管307、发光二极管302和发光二极管305依次串联。发光二极管308、发光二极管303、发光二极管306和发光二极管301依次串联。
在本公开的实施例中，背光单元的各个发光二极管可以是规格相同或不同的发光二极管。发光二极管设置成交叉结构，与将位于同一列的发光二极管串联在一起的结构相比，相邻发光二极管之间的间距更大。对串联在一起的一串发光二极管进行调整时，受影响的液晶面板的区域更大，更加有益于对液晶面板的色温的调整。
图4示出根据本公开的实施例的液晶面板的色温调整方法的流程图。
如图4所示，在步骤S401，感测液晶面板的色温。可通过色温表或色温仪 来可对液晶面板进行显示时发出的光进行测量。
在步骤S402，基于感测到的色温产生控制信号。作为示例，基于感测到的色温产生控制信号的步骤包括：将感测到的色温和预定色温之间的差值与阈值进行比较；当差值大于阈值时产生控制信号。控制信号可以是脉冲宽度调制信号。
作为示例，当差值大于阈值并且差值为正数时，可产生用于减小驱动电流的控制信号；当差值大于阈值并且差值为负数时，可产生用于增大驱动电流的控制信号。
在步骤S403，基于控制信号来调整用于驱动液晶面板的背光单元的驱动电流。作为示例，背光单元可以是上述实施例中所述的背光单元。
另外，本公开的另一实施例提供一种可包括上述实施例中所述的背光单元的液晶面板。
此外，根据本公开的上述方法可以被实现为计算机可读记录介质中的计算机代码。本领域技术人员可以根据对上述方法的描述来实现所述计算机代码。当所述计算机代码在计算机中被执行时实现本公开的上述方法。
此外，根据本公开的示例性实施例的液晶面板的色温调整装置中的各个单元可被实现为硬件组件。本领域技术人员根据限定的各个单元所执行的处理，可以使用例如现场可编程门阵列(FPGA)或专用集成电路(ASIC)来实现各个单元。
本公开的以上实施例仅仅是示例性的，而本公开并不受限于此。本领域技术人员应该理解：在不脱离本公开的原理和精神的情况下，可对这些实施例进行改变，其中，本公开的范围在权利要求及其等同物中限定。

Claims (10)

  1. 一种液晶面板的色温调整装置，包括：
    感测单元，感测液晶面板的色温；
    控制单元，基于感测到的色温来产生控制信号；
    背光集成电路，基于控制信号来调整用于驱动液晶面板的背光单元的驱动电流。
  2. 如权利要求1所述的色温调整装置，其中，控制单元包括：
    比较模块，将感测到的色温和预定色温之间的差值与阈值进行比较；
    信号产生模块，当差值大于阈值时产生控制信号。
  3. 如权利要求2所述的色温调整装置，其中，当差值大于阈值并且差值为正数时，信号产生模块产生用于减小驱动电流的控制信号；当差值大于阈值并且差值为负数时，信号产生模块产生用于增大驱动电流的控制信号。
  4. 如权利要求1所述的色温调整装置，还包括：通信单元，与外部装置通信。
  5. 如权利要求1所述的色温调整装置，其中，背光单元包括至少一组发光二极管，每组发光二极管包括排成两列的第一发光二极管、第二发光二极管、第三发光二极管和第四发光二极管，第一发光二极管和第二发光二极管依次排列在第一列中，第三发光二极管和第四发光二极管依次排列在第二列中，第四发光二极管的负极连接到第一发光二极管的正极，第二发光二极管的负极连接到第三发光二极管的正极。
  6. 一种液晶面板的色温调整方法，包括：
    (A)感测液晶面板的色温；
    (B)基于感测到的色温来产生控制信号；
    (C)基于控制信号来调整用于驱动液晶面板的背光单元的驱动电流。
  7. 如权利要求6所述的色温调整方法，其中，基于感测到的色温来产生控制信号的步骤包括：将感测到的色温和预定色温之间的差值与阈值进行比较；当差值大于阈值时产生控制信号。
  8. 如权利要求7所述的色温调整方法，其中，当差值大于阈值并且差值为正数时，产生用于减小驱动电流的控制信号；当差值大于阈值并且差值为负数时，产生用于增大驱动电流的控制信号。
  9. 如权利要求6所述的色温调整方法，其中，背光单元包括至少一组发光二极管，每组发光二极管包括排成两列的第一发光二极管、第二发光二极管、第三发光二极管和第四发光二极管，第一发光二极管和第二发光二极管依次排列在第一列中，第三发光二极管和第四发光二极管依次排列在第二列中，第四发光二极管的负极连接到第一发光二极管的正极，第二发光二极管的负极连接到第三发光二极管的正极。
  10. 一种液晶面板，包括：背光单元，其中，背光单元包括至少一组发光二极管，每组发光二极管包括排成两列的第一发光二极管、第二发光二极管、第三发光二极管和第四发光二极管，第一发光二极管和第二发光二极管依次排列在第一列中，第三发光二极管和第四发光二极管依次排列在第二列中，第四发光二极管的负极连接到第一发光二极管的正极，第二发光二极管的负极连接到第三发光二极管的正极。
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