WO2017028480A1 - 背光源及其调整方法、调整装置和显示装置 - Google Patents

背光源及其调整方法、调整装置和显示装置 Download PDF

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Publication number
WO2017028480A1
WO2017028480A1 PCT/CN2016/070094 CN2016070094W WO2017028480A1 WO 2017028480 A1 WO2017028480 A1 WO 2017028480A1 CN 2016070094 W CN2016070094 W CN 2016070094W WO 2017028480 A1 WO2017028480 A1 WO 2017028480A1
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WIPO (PCT)
Prior art keywords
brightness
unit
maximum
light
backlight
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PCT/CN2016/070094
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English (en)
French (fr)
Inventor
李佳龙
张�浩
时凌云
董学
王笛
王薇
卞青芳
韩帅
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/109,472 priority Critical patent/US9900947B2/en
Publication of WO2017028480A1 publication Critical patent/WO2017028480A1/zh

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    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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
    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight, an adjustment method thereof, an adjustment device, and a display device.
  • the liquid crystal display panel itself does not emit light, a backlight is required to provide sufficient brightness and uniform distribution of light to the liquid crystal display panel, thereby enabling the liquid crystal display panel to operate normally.
  • the backlight includes: a driving unit and a lighting unit connected to the driving unit, and the driving unit is configured to convert the voltage signal into driving for driving The driving signal (current signal) of the unit, and the light emitting unit emits light of a certain brightness under the driving of the driving signal.
  • each backlight corresponds to the same maximum luminance voltage signal when presenting maximum brightness.
  • the maximum brightness of some of the backlights may not be within the preset brightness range. For example, suppose the customer wants to produce a backlight with a maximum brightness of 400 nits to 500 nits (ie, the brightness of the backlight is between 400 nits and 500 nits after applying the maximum brightness voltage signal to the backlight), but in the same batch of backlights. A portion of the backlight exhibits a luminance of less than 400 nits or greater than 500 nits after the application of the maximum luminance voltage signal.
  • backlights with a luminance of less than 400 nits they will not be applied to the display device because they do not meet the customer's requirements, but for backlights with a luminance greater than 500 nit.
  • the light source (highlighted backlight) is applied to the display device because its maximum luminance is greater than the customer's requirement, that is, the backlight's illumination range can meet customer requirements.
  • the invention provides a backlight source, an adjustment method thereof, an adjusting device and a display device, which can effectively improve the uniformity of the range of the light emission brightness of the backlight in the production line.
  • a backlight including: a driving unit, a register, a pulse width modulation unit, and a light emitting unit, wherein the pulse width modulation unit is connected between the driving unit and the light emitting unit, a register coupled to the pulse width modulation unit, wherein
  • the driving unit is configured to convert a voltage signal into an original driving signal
  • the register is configured to define a preset threshold, where the preset threshold is a maximum value of a duty ratio of a signal output by the pulse width modulation unit during performing pulse width modulation;
  • the pulse width modulation unit is configured to adjust a duty ratio of the original driving signal according to the preset threshold, and generate an adjustment driving signal;
  • the light emitting unit is configured to emit light under the driving of the adjustment driving signal.
  • the lighting unit comprises a plurality of LEDs connected in parallel.
  • the pulse width modulation unit is configured to adjust a duty ratio of the original driving signal to be equal to the preset threshold according to a preset threshold defined by the register.
  • a method for adjusting the backlight including:
  • the second actual maximum light-emitting brightness that is presented when the light-emitting unit receives the adjusted maximum brightness driving signal with a duty ratio equal to the preset threshold is equal to a minimum value and a maximum value in the preset brightness range. average value.
  • the preset threshold is set to be 100%.
  • an adjustment device for the backlight comprising: a voltage input unit, a determination unit, and a threshold setting unit, wherein
  • the voltage input unit is configured to input a maximum brightness voltage signal to the driving unit, so that the driving unit outputs an original maximum brightness driving signal, where the maximum brightness voltage signal is a corresponding voltage signal when the backlight exhibits maximum brightness;
  • the determining unit is configured to determine whether the first actual maximum light-emitting brightness that is displayed by the light-emitting unit when the original maximum brightness driving signal is received is within a preset brightness range;
  • the threshold setting unit is configured to: according to the first actual maximum light-emitting brightness and the preset brightness, when the determining unit determines that the first actual maximum light-emitting brightness is greater than a maximum value of the preset brightness range Range to set a preset threshold in the register such that when the illumination unit receives the adjusted maximum brightness drive signal having a duty cycle equal to the preset threshold, the second actual maximum illumination brightness is located at the Within the preset brightness range.
  • the threshold setting unit is further configured to set the preset threshold to be 100% when the determining unit determines that the first actual maximum light-emitting brightness is within the preset brightness range.
  • a display device comprising: a backlight using the backlight as described above.
  • the invention provides a backlight and an adjustment method thereof, an adjusting device and a display device, wherein the backlight comprises: a driving unit, a register, a pulse width modulation unit and a light emitting unit, wherein the pulse width modulation unit is connected to the driving unit and the light emitting unit
  • the register is connected to the pulse width modulation unit;
  • the driving unit is configured to convert the voltage signal into the original driving signal;
  • the register is used to define a preset threshold, and the preset threshold is a signal output by the pulse width modulation unit during the pulse width modulation process.
  • the pulse width modulation unit is configured to adjust a duty ratio of the driving signal according to the preset threshold, and generate an adjustment driving signal
  • the lighting unit is configured to perform illumination by driving the adjustment driving signal.
  • the backlight provided by the present invention is capable of limiting its own maximum luminance of illumination so that its actual range of luminance of illumination is adjusted. Therefore, when a high-brightness backlight occurs in the production line, the maximum illumination brightness of the high-brightness backlight in the production line can be reduced by the technical solution of the invention, thereby effectively improving the uniformity of the range of the illumination brightness of the backlight in the production line. . In addition, since the maximum light-emitting luminance of the highlight backlight is lowered, the overall power consumption of the display device including the highlight backlight can be reduced.
  • FIG. 1 is a schematic structural view of a backlight in the prior art
  • FIG. 2 is a schematic structural diagram of a backlight according to an embodiment of the present invention.
  • 3 is a waveform diagram of an original maximum luminance driving signal and an adjusted maximum luminance driving signal with a duty ratio of 80%;
  • FIG. 4 is a schematic structural diagram of a backlight adjusting device according to an embodiment of the present invention.
  • FIG. 5 is a schematic view showing the adjustment of the backlight shown in FIG. 2 by using the adjusting device shown in FIG. 4;
  • FIG. 6 is a flowchart of a method for adjusting a backlight according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a backlight according to an embodiment of the present invention.
  • the backlight comprises: a driving unit 1, a register 4, a pulse width modulation unit 3 and a light emitting unit 2, the pulse width modulation unit 3 is connected between the driving unit 1 and the light emitting unit 2, and the register 4 and the pulse width
  • the modulation unit 3 is connected;
  • the driving unit 1 is used to convert the voltage signal into the original driving signal;
  • the register 4 is used to define a preset threshold, and the preset threshold is the duty of the signal output by the pulse width modulation unit 3 during the pulse width modulation process.
  • the pulse width modulation unit 3 is configured to adjust the duty ratio of the original driving signal according to a preset threshold defined in the register 4, and generate an adjustment driving signal;
  • the lighting unit 2 is configured to be driven by the adjustment driving signal Glow light.
  • the light emitting unit 2 can be any light emitting structure that can be driven by current, such as an OLED, an LED, or the like.
  • the light emitting unit 2 includes a plurality of LEDs connected in parallel.
  • the technical solution of the present invention provides a pulse width modulation unit 3 between the driving unit 1 and the light emitting unit 2, and defines the duty ratio of the signal output by the pulse width modulation unit 3 during the pulse width modulation process through the register 4.
  • the maximum value so that the actual maximum luminance of the backlight can be limited, that is, the actual range of luminance of the backlight is adjusted.
  • the maximum brightness of the backlight produced by the customer is between 400 nits and 500 nits, that is, the brightness of the backlight after the application of the maximum brightness voltage signal is between 400 nits and 500 nits.
  • the pulse width modulation unit 3 does not perform pulse width modulation processing on the drive signal generated by the drive unit 1
  • the luminance of the light emitted from the light-emitting unit 2 after the backlight of the present embodiment is applied with the maximum luminance voltage is 550 nits, that is,
  • the maximum illumination brightness of the backlight provided by this embodiment is greater than the maximum illumination brightness required by the customer, and the theoretical illumination range corresponding to the backlight is 0-550 nits.
  • the original maximum brightness driving signal (the duty) outputted by the pulse width adjusting unit to the driving unit 1 after receiving the maximum brightness voltage signal is required (duty)
  • the duty ratio is adjusted by 100%).
  • the maximum value of the duty ratio of the signal output by the pulse width modulation unit 3 during the pulse width modulation process is limited to 80% by using the register 4.
  • Pre-set threshold Set is 80%.
  • the maximum duty ratio of the signal that the pulse width modulation unit 3 can output is 80%, and the maximum light emission luminance of the light-emitting unit 2 is 440 nits.
  • FIG. 3 is a waveform diagram of the original maximum luminance driving signal and the adjusted maximum luminance driving signal with a duty ratio of 80%, as shown in FIG. 3, when the light emitting unit 2 receives the original maximum luminance driving signal with a duty ratio of 100%.
  • the light-emitting unit 2 is in a continuous light-emitting state, and the light-emitting luminance corresponding to the light-emitting unit 2 is 550 nits.
  • the light-emitting unit 2 When the light-emitting unit 2 receives the adjusted maximum brightness driving signal with a duty ratio of 80% (that is, a ratio of the time t2 in the high-level state to the period t is 0.8), the light-emitting unit 2 continuously The ground is switched between the "lighting state" (the time period corresponding to t2) and the “non-lighting state” (the time period corresponding to t1), and the switching frequency is the same as the frequency of adjusting the maximum brightness driving signal. It should be noted that since the switching frequency of the light-emitting unit 2 between the "light-emitting state" and the "non-light-emitting state” is fast, the human eye cannot perceive the switching process.
  • the total time of the light-emitting unit 2 in the "light-emitting state” is 0.8 s, and the total time in the "non-light-emitting state” is 0.2 s.
  • the register 4 limits the maximum value of the duty ratio of the signal output by the pulse width modulation unit 3 during the pulse width modulation process to 80%, regardless of how the pulse width modulation unit 3 adjusts the original maximum luminance driving signal, the light emitting unit 2
  • the maximum brightness that can be generated does not exceed 440 nits, that is, the actual illuminance of the backlight ranges from 0 to 440 nits.
  • the above-mentioned setting of the preset threshold to 80% only serves as an exemplary function, and those skilled in the art should know that in the present invention, according to the actual performance of the backlight and the customer's needs, The preset threshold is adjusted accordingly.
  • the pulse width modulation unit 3 can be used to appropriately adjust the duty ratio of the original driving signal according to actual needs (the pulse width modulation unit 3).
  • the duty ratio of the outputted signal is less than or equal to a preset threshold) to cause a change in the luminance of the backlight, thereby achieving adjustment of the overall brightness of the display device.
  • An embodiment of the present invention further provides a display device, where the display device includes a backlight.
  • the backlight source uses the above-mentioned backlight.
  • the backlight refer to the corresponding content, and details are not described herein.
  • the present embodiment provides a backlight and a display device, wherein the backlight is capable of limiting its own maximum luminance of illumination so that its actual range of luminance of illumination is adjusted. Therefore, when a high-brightness backlight occurs in the production line, the maximum illumination brightness of the high-brightness backlight in the production line can be reduced by the technical solution of the invention, thereby effectively improving the uniformity of the range of the illumination brightness of the backlight in the production line. . In addition, since the maximum light-emitting luminance of the highlight backlight is lowered, the overall power consumption of the display device including the highlight backlight is lowered.
  • an adjustment device for a backlight is provided.
  • 4 is a schematic structural view of a backlight adjusting device according to an embodiment of the present invention
  • FIG. 5 is a schematic structural view of the backlight shown in FIG. 2 when the adjusting device shown in FIG.
  • the backlight is the backlight in the above embodiment
  • the adjustment device of the backlight includes a voltage input unit 5, a determination unit 6, and a threshold setting unit 7.
  • the voltage input unit 5 is configured to input a maximum brightness voltage signal to the driving unit 1 for the driving unit 1 to output an original maximum brightness driving signal, and the maximum brightness voltage signal is a corresponding voltage signal when the backlight exhibits maximum brightness.
  • the driving unit 1 outputs the original maximum luminance driving signal, and if the original maximum luminance driving signal is not subjected to the pulse width modulation processing, it is directly input to The light emitting unit 2, at this time, the light emitting unit 2 will exhibit a first actual maximum light emitting brightness.
  • the determining unit 6 is configured to determine whether the first actual maximum light-emitting brightness that the light-emitting unit 2 presents when receiving the original maximum brightness driving signal is within a preset brightness range.
  • the preset brightness range is set according to the maximum light-emitting brightness required by the user.
  • the maximum luminance of the light-emitting unit 2 can be detected in any manner known in the art.
  • a luminance signal such as a first actual maximum light-emitting luminance of the light-emitting unit 1 may be acquired using a photosensor and converted into a corresponding electrical signal to be output to the determination unit 6.
  • the judging unit 6 makes a judgment based on the received electric signal corresponding to the luminance signal.
  • the determining unit 6 determines that the first actual maximum light-emitting brightness that the light-emitting unit 2 presents when receiving the original maximum brightness driving signal is less than the minimum value of the preset brightness range, then It indicates that the backlight cannot meet the level of customer demand, that is, it cannot be applied to the display device.
  • the threshold setting unit 7 sets the preset threshold according to the first actual maximum light-emitting brightness and the light-emitting brightness range of the backlight, so that when the light-emitting unit 2 receives the adjusted driving signal whose duty ratio is equal to the preset threshold, the first 2.
  • the actual maximum luminance is within the preset luminance range.
  • the magnitude of the preset threshold may be determined by a first actual maximum illumination brightness of the backlight and a second actual maximum illumination brightness desired by the operator, the second actual maximum illumination brightness being within the range of illumination brightness.
  • the second actual maximum light-emitting brightness that is presented when the light-emitting unit 2 receives the adjusted driving signal with the duty ratio equal to the preset threshold is equal to the minimum value of the preset brightness range and The average value of the maximum value is accurate; alternatively, when the preset threshold is set, the second actual maximum light-emitting brightness that is presented when the light-emitting unit 2 receives the adjusted driving signal with the duty ratio equal to the preset threshold may be equal to The maximum value in the preset brightness range is subject to change.
  • a value may be arbitrarily selected from the preset brightness range as the second actual maximum light-emitting brightness of the backlight, and the ratio of the second actual maximum light-emitting brightness to the first actual maximum light-emitting brightness is set as a preset threshold.
  • the preset threshold is configured for the register 4 by the threshold setting unit 7 to limit the maximum duty ratio of the output signal of the pulse width modulation unit 3, thereby realizing the adjustment of the actual illumination luminance range of the backlight.
  • the threshold setting unit 7 limits the maximum duty ratio of the output signal of the pulse width modulation unit 3, thereby realizing the adjustment of the actual illumination luminance range of the backlight.
  • the judging unit 6 determines that the first actual maximum illuminating brightness of the illuminating unit 2 when the original maximum brightness driving signal is received is within the preset brightness range, it indicates that the backlight meets the level required by the customer, and the backlight is not needed at this time.
  • the maximum light-emitting luminance is limited, so the threshold setting unit 7 can configure the preset threshold in the register 4 to be 100%.
  • An embodiment of the present invention provides an adjustment device for a backlight, by which the maximum illumination brightness of the backlight provided by the above embodiment is limited.
  • the actual luminance range of the backlight is adjusted. Therefore, when a high-brightness backlight occurs in the production line, the maximum illumination brightness of the high-brightness backlight in the production line can be reduced by the technical solution of the invention, thereby effectively improving the uniformity of the range of the illumination brightness of the backlight in the production line. .
  • FIG. 6 is a flowchart of a method for adjusting a backlight according to an embodiment of the present invention. As shown in FIG. 6 , the adjustment method is based on the adjustment device provided in the foregoing embodiment, and is used to adjust the backlight provided by the foregoing embodiment, and the adjustment method includes:
  • Step 101 Input a maximum luminance voltage signal to the driving unit 1, so that the driving unit 1 outputs the original maximum luminance driving signal.
  • the step 101 is performed by the voltage input unit 5 provided by the above embodiment.
  • the voltage input unit 5 provided by the above embodiment.
  • Step 102 Determine whether the first actual maximum light-emitting brightness that the light-emitting unit 2 presents when receiving the original maximum brightness driving signal is within a preset brightness range.
  • the step 102 is performed by the judging unit 6 provided by the foregoing embodiment.
  • the judging unit 6 provided by the foregoing embodiment.
  • the judging unit 6 compares the first actual maximum light-emission luminance L 1 presented by the light-emitting unit 2 when receiving the original maximum luminance driving signal with the maximum value T Max and the minimum value T Min of the preset luminance range.
  • the judging unit 6 judges that the first actual maximum light-emission luminance L 1 presented when the light-emitting unit 2 receives the original maximum luminance driving signal is smaller than the minimum value T Min of the preset luminance range (ie, L 1 ⁇ T Min ), then It is indicated that the backlight cannot meet the level of customer demand (that is, the backlight is confirmed to be defective) and cannot be applied to the display device.
  • the determining unit determines that the first actual maximum light-emitting brightness L 1 that is presented when the light-emitting unit 2 receives the original maximum brightness driving signal is greater than the maximum value T Max of the preset brightness range (ie, L 1 >T Max ),
  • T Max the maximum value of the preset brightness range
  • the actual maximum emission luminance when the first determination unit 6 determines that the light-emitting unit 2 is rendered upon receiving the original drive signal maximum luminance L 1 is within a predetermined luminance range (i.e., T Min ⁇ L 1 ⁇ T Max), then explained
  • T Min ⁇ L 1 ⁇ T Max a predetermined luminance range
  • Step 103 Set a preset threshold according to the first actual maximum light-emitting brightness and the preset brightness range, so that the second actual maximum light-emitting brightness that is presented when the light-emitting unit 2 receives the adjusted driving signal with the duty ratio equal to the preset threshold is located. Within the preset brightness range.
  • the step 103 is performed by the threshold setting unit 7 provided by the above embodiment.
  • the threshold setting unit 7 provided by the above embodiment.
  • the second actual maximum light-emitting brightness that is presented when the light-emitting unit 2 receives the adjusted driving signal with the duty ratio equal to the preset threshold may be equal to the preset brightness range.
  • the minimum value and the maximum value are taken as the average value, that is, the preset threshold is set to be equal to the ratio of the second actual maximum light-emitting brightness to the average value of the minimum value and the maximum value in the preset brightness range.
  • Step 104 Set the preset threshold in register 4 to be 100%.
  • Step 104 is also performed by the threshold setting unit 7. Since it is determined in step 102 that the backlight meets the level of the customer's demand, there is no need to limit the maximum light-emitting brightness of the backlight at this time, so the threshold setting unit 7 can configure the preset threshold in the register 4 to be 100%.
  • An embodiment of the present invention provides a method for adjusting a backlight.
  • the adjustment method is used to limit the maximum luminance of the backlight provided in the foregoing embodiment, so that the actual luminance range of the backlight is adjusted. Therefore, when a high-brightness backlight occurs in the production line, the maximum illumination brightness of the high-brightness backlight in the production line can be reduced by the technical solution of the invention, thereby effectively improving the uniformity of the range of the illumination brightness of the backlight in the production line. .

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Abstract

一种背光源及其调整方法、调整装置和显示装置，其中该背光源包括：驱动单元（1）、寄存器（4）、脉宽调制单元（3）和发光单元（2），脉宽调制单元（3）连接于驱动单元（1）和发光单元（2）之间，寄存器（4）与脉宽调制单元（3）连接。驱动单元（1）用于将电压信号转化为原始驱动信号；寄存器（4）用于限定预设阈值，预设阈值为脉宽调制单元（3）在进行脉宽调制过程中输出的信号的占空比的最大值；脉宽调制单元（3）用于根据预设阈值对驱动信号的占空比进行调整，并生成调整驱动信号；发光单元（2）用于在调整驱动信号的驱动下进行发光。该背光源能够对其自身的最大发光亮度进行限制，以使得其自身的实际发光亮度范围得到调整。

Description

背光源及其调整方法、调整装置和显示装置 技术领域
本发明涉及显示技术领域，特别涉及一种背光源及其调整方法、调整装置和显示装置。
背景技术
在显示装置中，由于液晶显示面板自身不会发光，因此需要背光源来为液晶显示面板提供足够亮度和分布均匀的光，从而使得液晶显示面板能够正常的工作。
图1为现有技术中一种背光源的结构示意图，如图1所示，该背光源包括：驱动单元和与驱动单元连接的发光单元，驱动单元用于将电压信号转变成用于驱动发光单元的驱动信号(电流信号)，发光单元在驱动信号的驱动下发出一定亮度的光。
然而，在背光源的实际生产过程中，由于例如工艺上的误差等因素，使得在同批次背光源中会出现部分背光源的驱动单元和/或发光单元的实际属性与理想属性存在明显差异的情况。具体地，当向同批次背光源中的背光源施加相同的电压信号时，该批次背光源中会存在部分背光源的亮度与其他背光源的亮度明显不一致的现象。
对于同批次背光源而言，各背光源在呈现最大亮度时对应相同的最大亮度电压信号。当对该批次中的背光源施加最大亮度电压信号时，部分背光源的最大亮度可能不在预设亮度范围内。例如，假定客户要求生产出的背光源的最大发光亮度要处于400nits～500nits(即对背光源施加最大亮度电压信号后发光亮度要处于400nits～500nits之间),然而在同批次的背光源中，部分背光源在施加了该最大亮度电压信号后所呈现的发光亮度小于400nits或大于500nits。对于发光亮度小于400nits的背光源，由于不符合客户要求，则不会被应用到显示装置中，而对于发光亮度大于500nit的背 光源(高亮背光源)，由于其最大发光亮度大于客户需求，即该背光源的发光亮度范围能够满足客户需求，则会被应用到显示装置中。
然而，由于这些最大发光亮度大于客户需求的背光源被应用到了显示装置中，因此使得显示装置的发光亮度范围的均一性不佳；其次，包括这些高亮背光源的显示装置由于亮度过高，从而导致功耗较大。
发明内容
本发明提供一种背光源及其调整方法、调整装置和显示装置，可有效提升产线中背光源的发光亮度范围的均一性。
根据本发明的一个方面，提供了一种背光源，包括：驱动单元、寄存器、脉宽调制单元和发光单元，所述脉宽调制单元连接于所述驱动单元和所述发光单元之间，所述寄存器与所述脉宽调制单元连接，其中，
所述驱动单元用于将电压信号转化为原始驱动信号；
所述寄存器用于限定预设阈值，所述预设阈值为所述脉宽调制单元在进行脉宽调制过程中输出的信号的占空比的最大值；
所述脉宽调制单元用于根据所述预设阈值对所述原始驱动信号的占空比进行调整，并生成调整驱动信号；以及
所述发光单元用于在所述调整驱动信号的驱动下进行发光。
可选地，所述发光单元包括若干个并联的LED。
可选地，所述脉宽调制单元用于根据所述寄存器限定的预设阈值将所述原始驱动信号的占空比调整为等于所述预设阈值
根据本发明的另一方面，还提供了上述背光源的调整方法，包括：
向所述驱动单元输入最大亮度电压信号，使得所述驱动单元输出原始最大亮度驱动信号，所述最大亮度电压信号为所述背光源呈现最大亮度时对应的电压信号；
判断所述发光单元在接收到所述原始最大亮度驱动信号时呈现的第一实际最大发光亮度是否位于预设亮度范围内；
当判断出所述第一实际最大发光亮度大于所述预设亮度范围中的最大值时，根据所述第一实际最大发光亮度和所述预设亮度范围来设置所述预设阈值，以使得当所述发光单元接收到占空比等于所述预设阈值的所述调整最大亮度驱动信号时呈现的第二实际最大发光亮度位于所述预设亮度范围内。
可选地，所述发光单元接收到占空比等于所述预设阈值的所述调整最大亮度驱动信号时呈现的第二实际最大发光亮度等于所述预设亮度范围中的最小值与最大值的平均值。
可选地，当判断出所述第一实际发光亮度位于所述预设亮度范围内时，设置所述预设阈值为100％。
根据本发明的又一方面，还提供了上述背光源的调整装置，包括：电压输入单元、判断单元和阈值设置单元，其中，
所述电压输入单元用于向所述驱动单元输入最大亮度电压信号，使得所述驱动单元输出原始最大亮度驱动信号，所述最大亮度电压信号为所述背光源呈现最大亮度时对应的电压信号；
所述判断单元用于判断所述发光单元在接收到所述原始最大亮度驱动信号时呈现的第一实际最大发光亮度是否位于预设亮度范围内；
所述阈值设置单元用于在所述判断单元判断出所述第一实际最大发光亮度大于所述预设亮度范围中的最大值时，根据所述第一实际最大发光亮度和所述预设亮度范围来设置所述寄存器中的预设阈值，以使得当所述发光单元接收到占空比等于所述预设阈值的所述调整最大亮度驱动信号时呈现的第二实际最大发光亮度位于所述预设亮度范围内。
可选地，所述阈值设置单元还用于在所述判断单元判断出所述第一实际最大发光亮度位于所述预设亮度范围内时，设置所述预设阈值为100％。
根据本发明的另一方面，还提供了一种显示装置，包括：背光源，所述背光源采用上述的背光源。
本发明具有以下有益效果：
本发明提供了一种背光源及其调整方法、调整装置和显示装置，其中该背光源包括：驱动单元、寄存器、脉宽调制单元和发光单元，脉宽调制单元连接于驱动单元和发光单元之间，寄存器与脉宽调制单元连接；驱动单元用于将电压信号转化为原始驱动信号；寄存器用于限定预设阈值，预设阈值为脉宽调制单元在进行脉宽调制过程中输出的信号的占空比的最大值；脉宽调制单元用于根据所述预设阈值对驱动信号的占空比进行调整，并生成调整驱动信号；发光单元用于在调整驱动信号的驱动下进行发光。本发明提供的背光源能够对其自身的最大发光亮度进行限制，以使得其自身的实际发光亮度范围得到调整。因此，当产线中出现高亮背光源时，通过本发明的技术方案可使得产线中的高亮背光源的最大发光亮度降低，从而有效提升产线中背光源的发光亮度范围的均一性。此外，由于高亮背光源的最大发光亮度被降低，因此可使得包括高亮背光源的显示装置的整体功耗降低。
附图说明
图1为现有技术中一种背光源的结构示意图；
图2为本发明实施例提供的一种背光源的结构示意图；
图3为原始最大亮度驱动信号和占空比为80％的调整最大亮度驱动信号的波形图；
图4为本发明实施例提供的背光源的调整装置的结构示意图；
图5为利用图4所示调整装置对图2所示背光源进行调整时的示意图；以及
图6为本发明实施例提供的一种背光源的调整方法的流程图。
具体实施方式
为使本领域的技术人员更好地理解本发明的技术方案，下面结合附图对本发明提供的一种背光源及其调整方法、调整装置和显示装置进行详细描述。
根据本发明的一方面，提供了一种背光源，图2为本发明实施例提供的背光源的结构示意图。如图2所示，该背光源包括：驱动单元1、寄存器4、脉宽调制单元3和发光单元2，脉宽调制单元3连接在驱动单元1和发光单元2之间，寄存器4与脉宽调制单元3连接；驱动单元1用于将电压信号转化为原始驱动信号；寄存器4用于限定预设阈值，预设阈值为脉宽调制单元3在进行脉宽调制过程中输出的信号的占空比的最大值；脉宽调制单元3用于根据寄存器4中限定的预设阈值对原始驱动信号的占空比进行调整，并生成调整驱动信号；发光单元2用于在调整驱动信号的驱动下进行发光。
本实施例中，发光单元2可以为任何可以采用电流驱动的发光结构，例如OLED、LED等。本实施例中，可选地，发光单元2包括若干个并联的LED。
本发明的技术方案通过在驱动单元1和发光单元2之间设置一个脉宽调制单元3，且通过寄存器4来限定脉宽调制单元3在进行脉宽调制过程中输出的信号的占空比的最大值，从而可对背光源的实际最大发光亮度进行限制，即对背光源的实际发光亮度范围进行调节。
下面将结合实例来对本发明的发明原理进行详细的说明。假定客户要求生产出的背光源的最大发光亮度要处于400nits～500nits之间，即客户需要背光源在施加最大亮度电压信号后的发光亮度要处于400nits～500nits之间。假定在脉宽调制单元3不对驱动单元1所产生的驱动信号进行脉宽调制处理的情况下，在本实施例的背光源被施加最大亮度电压之后发光单元2所发出光的亮度为550nits，即本实施例提供的背光源的最大发光亮度大于客户需求的最大发光亮度，该背光源所对应的理论发光亮度范围为0～550nits。
在本实施例中，为使得发光单元2的最大发光亮度处于400nits～500nits之间，则需要脉宽调整单元对驱动单元1在接收到最大亮度电压信号后输出的原始最大亮度驱动信号(占空比为100％)的占空比进行调整。例如，当操作人员希望发光单元2的最大发光亮度调整为440nits时，则利用寄存器4将脉宽调制单元3在进行脉宽调制过程中输出的信号的占空比的最大值限定为80％，即将预设阈值 设定为80％。此时脉宽调制单元3能够输出的信号的最大占空比为80％，发光单元2的最大发光亮度为440nits。
下面将结合附图对本实施例中利用脉宽调制单元3对背光源的最大亮度值进行调整的原理进行详细说明。
图3为原始最大亮度驱动信号和占空比为80％的调整最大亮度驱动信号的波形图，如图3所示，当发光单元2接收到占空比为100％的原始最大亮度驱动信号时，该发光单元2会处于持续发光状态，此时发光单元2对应的发光亮度为550nits。而当发光单元2接收到占空比为80％(即在一个周期t内，处于高电平状态的时间t2与周期t之比为0.8)的调整最大亮度驱动信号时，发光单元2会不断地在“发光状态”(t2所对应的时间段)和“非发光状态”(t1所对应的时间段)之间进行切换，切换频率与调整最大亮度驱动信号的频率相同。需要说明的是，由于发光单元2在“发光状态”和“非发光状态”之间的切换频率较快，人眼无法察觉到该切换过程。以周期t为1s钟为例，该发光单元2处于“发光状态”的时间总和为0.8s，处于“非发光状态”的时间总和为0.2s，此时该发光单元2对应的发光亮度为550nits×0.8＝440nits。
当寄存器4将脉宽调制单元3在进行脉宽调制过程中输出的信号的占空比的最大值限定为80％时，无论脉宽调制单元3怎么对原始最大亮度驱动信号进行调整，发光单元2能够产生的最大亮度都不会超过440nits，即该背光源的实际发光亮度范围为0～440nits。
需要说明的是，上述将预设阈值设定为80％的情况仅起到示例性作用，本领域的技术人员应该知晓的是，在本发明中可以根据背光源的实际性能以及客户需求来对该预设阈值进行相应的调整。
此外，需要补充说明的是，当用户在使用本实施例提供的背光源时，可以根据实际需求利用该脉宽调制单元3对原始驱动信号的占空比进行适当的调整(脉宽调制单元3输出的信号的占空比小于或等于预设阈值)，以使得背光源的发光亮度发生变化，从而实现对显示装置的整体亮度的调整。
本发明实施例还提供了一种显示装置，该显示装置包括背光源， 其中该背光源采用上述的背光源，对该背光源的具体描述可参见上述相应内容，此处不再进行赘述。
本实施例提供了一种背光源和显示装置，其中该背光源能够对其自身的最大发光亮度进行限制，以使得其自身的实际发光亮度范围得到调整。因此，当产线中出现高亮背光源时，通过本发明的技术方案可使得产线中的高亮背光源的最大发光亮度降低，从而有效提升产线中背光源的发光亮度范围的均一性。此外，由于高亮背光源的最大发光亮度被降低，因此包括高亮背光源的显示装置的整体功耗降低。
根据本发明的另一方面，提供了一种背光源的调整装置。图4为本发明实施例提供的背光源的调整装置的结构示意图，图5为利用图4所示调整装置对图2所示背光源进行调整时的结构示意图。如图4和图5所示，该背光源为上述实施例中的背光源，该背光源的调整装置包括：电压输入单元5、判断单元6和阈值设置单元7。
电压输入单元5用于向驱动单元1输入最大亮度电压信号，以供驱动单元1输出原始最大亮度驱动信号，最大亮度电压信号为背光源呈现最大亮度时对应的电压信号。在利用电压输入单元5向背光源中的驱动单元1施加最大亮度电压的情况下，驱动单元1会输出原始最大亮度驱动信号，若该原始最大亮度驱动信号不经过脉宽调制处理，而直接输入至发光单元2，此时发光单元2会呈现第一实际最大发光亮度。
判断单元6用于判断发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度是否位于预设亮度范围内。其中，该预设亮度范围是根据用户所需要的最大发光亮度而进行设定的。
可以采用现有技术中已知的任何方式来检测发光单元2的最大发光亮度。例如，可以采用光电传感器获取发光单元1的诸如第一实际最大发光亮度之类的亮度信号，并将其转换为相应的电信号以输出到判断单元6。判断单元6基于接收到的与亮度信号相对应的电信号来进行判断。
当判断单元6判断出发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度小于预设亮度范围的最小值时，则 说明该背光源无法满足客户需求的水平，即无法应用于显示装置中。
当判断单元6判断出发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度大于预设亮度范围的最大值时，则说明该背光源超出客户需求的水平，但是基于产线中背光源的发光亮度范围的均一性和显示装置整体功耗的考虑，需要对该高亮背光源的最大发光亮度进行限制。具体地，阈值设置单元7根据背光源的第一实际最大发光亮度和发光亮度范围来设置预设阈值，以使得当发光单元2接收到占空比等于预设阈值的调整驱动信号时呈现的第二实际最大发光亮度位于预设亮度范围内。
该预设阈值的大小可以由背光源的第一实际最大发光亮度以及操作人员所期望的第二实际最大发光亮度确定，该第二实际最大发光亮度位于发光亮度范围内。可选地，在设定预设阈值时，可以以使得发光单元2接收到占空比等于预设阈值的调整驱动信号时呈现的第二实际最大发光亮度等于预设亮度范围中的最小值与最大值的平均值为准；可选择地，在设定预设阈值时，也可以以使得发光单元2接收到占空比等于预设阈值的调整驱动信号时呈现的第二实际最大发光亮度等于预设亮度范围中的最大值为准。当然，也可以从该预设亮度范围中任意选取一个值来作为背光源的第二实际最大发光亮度，将第二实际最大发光亮度与第一实际最大发光亮度之比设置为预设阈值。
本发明实施例中通过阈值设置单元7为寄存器4配置预设阈值，以对脉宽调制单元3的输出信号的最大占空比进行限定，从而实现对背光源的实际发光亮度范围进行调整，其原理可参见上述实施例一中相应的内容，此处不再进行赘述。
如果判断单元6判断出发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度位于预设亮度范围内，则说明该背光源符合客户需求的水平，此时无需对背光源的最大发光亮度进行限制，因此阈值设置单元7可将寄存器4中的预设阈值配置为100％。
本发明实施例提供了一种背光源的调整装置，利用该调整装置可对上述实施例提供的背光源的最大发光亮度进行相应的限制，从而 使得背光源的实际发光亮度范围得到调整。因此，当产线中出现高亮背光源时，通过本发明的技术方案可使得产线中的高亮背光源的最大发光亮度降低，从而有效提升产线中背光源的发光亮度范围的均一性。
根据本发明的另一方面，还提供了一种背光源的调整方法。图6为本发明实施例提供的背光源的调整方法的流程图。如图6所示，该调整方法基于上述实施例提供的调整装置，用于对上述实施例提供的背光源进行调整，该调整方法包括：
步骤101：向驱动单元1输入最大亮度电压信号，使得驱动单元1输出原始最大亮度驱动信号。
步骤101由上述实施例提供的电压输入单元5来执行，具体过程可参见上述实施例中对电压输入单元5的相应描述。
步骤102：判断发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度是否位于预设亮度范围内。
步骤102由上述实施例提供中的判断单元6来执行，具体过程可参见上述实施例中对判断单元6的相应描述。
具体地，判断单元6将发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度L1与预设亮度范围的最大值TMax和最小值TMin进行比较。当判断单元6判断出发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度L1小于预设亮度范围的最小值TMin(即，L1＜TMin)时，则说明该背光源无法满足客户需求的水平(即，确认该背光源为不良品)，无法应用到显示装置中。
当判断单元判断出发光单元2在接收到原始最大亮度驱动信号时呈现的第一实际最大发光亮度L1大于预设亮度范围的最大值TMax(即，L1＞TMax)时，则说明该背光源已经超出客户需求的水平，但是基于产线中背光源的发光亮度范围的均一性和显示装置整体功耗的考虑，需要对该高亮背光源的最大发光亮度进行限制。此时，执行下述步骤103。
当判断单元6判断出发光单元2在接收到原始最大亮度驱动信 号时呈现的第一实际最大发光亮度L1位于预设亮度范围内(即，TMin≤L1≤TMax)时，则说明该背光源符合客户需求的水平。此时执行下述步骤104。
步骤103：根据第一实际最大发光亮度和预设亮度范围来设置预设阈值，以使得当发光单元2接收到占空比等于预设阈值的调整驱动信号时呈现的第二实际最大发光亮度位于预设亮度范围内。
步骤103由上述实施例提供的阈值设置单元7来执行，具体过程可参见上述实施例中对阈值设置单元7的相应描述。
可选地，在阈值设置单元7设定预设阈值时，可以以使得发光单元2接收到占空比等于预设阈值的调整驱动信号时呈现的第二实际最大发光亮度等于预设亮度范围中的最小值与最大值的平均值为准，即，将预设阈值设置为等于第二实际最大发光亮度与预设亮度范围中的最小值与最大值的平均值的比值。步骤104：设置寄存器4中的预设阈值为100％。
步骤104也由阈值设置单元7来执行。由于步骤102中判断出背光源符合客户需求的水平，此时无需对背光源的最大发光亮度进行限制，因此阈值设置单元7可将寄存器4中的预设阈值配置为100％。
本发明实施例提供了一种背光源的调整方法，利用该调整方法对上述实施例中提供的背光源的最大发光亮度进行限制，从而使得背光源的实际发光亮度范围得到调整。因此，当产线中出现高亮背光源时，通过本发明的技术方案可使得产线中的高亮背光源的最大发光亮度降低，从而有效提升产线中背光源的发光亮度范围的均一性。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。

Claims (9)

  1. 一种背光源，包括：驱动单元、寄存器、脉宽调制单元和发光单元，所述脉宽调制单元连接于所述驱动单元和所述发光单元连接之间，所述寄存器与所述脉宽调制单元连接，其中，
    所述驱动单元用于将电压信号转化为原始驱动信号；
    所述寄存器用于限定预设阈值，所述预设阈值为所述脉宽调制单元在进行脉宽调制过程中输出的信号的占空比的最大值；
    所述脉宽调制单元用于根据所述寄存器限定的预设阈值对所述原始驱动信号的占空比进行调整，并生成调整驱动信号；并且
    所述发光单元用于在所述调整驱动信号的驱动下进行发光。
  2. 根据权利要求1所述的背光源，其中，所述发光单元包括多个并联的LED。
  3. 根据权利要求1或2所述的背光源，其中，所述脉宽调制单元用于根据所述寄存器限定的预设阈值将所述原始驱动信号的占空比调整为等于所述预设阈值。
  4. 一种根据权利要求1至3中任一项所述的背光源的调整方法，包括：
    向所述驱动单元输入最大亮度电压信号，使得所述驱动单元输出原始最大亮度驱动信号，所述最大亮度电压信号为所述背光源呈现最大亮度时对应的电压信号；
    判断所述发光单元在接收到所述原始最大亮度驱动信号时呈现的第一实际最大发光亮度是否位于预设亮度范围内；
    当判断出所述第一实际最大发光亮度大于所述预设亮度范围中的最大值时，根据所述第一实际最大发光亮度和所述预设亮度范围来设置所述预设阈值，以使得当所述发光单元接收到占空比等于所述预设阈值的所述调整最大亮度驱动信号时呈现的第二实际最大发光亮 度位于所述预设亮度范围内。
  5. 根据权利要求4所述的背光源的调整方法，其中，所述发光单元接收到占空比等于所述预设阈值的所述调整最大亮度驱动信号时呈现的第二实际最大发光亮度等于所述预设亮度范围中的最小值与最大值的平均值。
  6. 根据权利要求4所述的背光源的调整方法，其中，当判断出所述第一实际发光亮度位于所述预设亮度范围内时，设置所述预设阈值为100％。
  7. 一种根据权利要求1-3中任一项所述的背光源的调整装置，包括：电压输入单元、判断单元和阈值设置单元，其中
    所述电压输入单元用于向所述驱动单元输入最大亮度电压信号，使得所述驱动单元输出原始最大亮度驱动信号，所述最大亮度电压信号为所述背光源呈现最大亮度时对应的电压信号；
    所述判断单元用于判断所述发光单元在接收到所述原始最大亮度驱动信号时呈现的第一实际最大发光亮度是否位于预设亮度范围内；
    所述阈值设置单元用于在所述判断单元判断出所述第一实际最大发光亮度大于所述预设亮度范围中的最大值时，根据所述第一实际最大发光亮度和所述预设亮度范围来设置所述寄存器中的预设阈值，以使得当所述发光单元接收到占空比等于所述预设阈值的所述调整最大亮度驱动信号时呈现的第二实际最大发光亮度位于所述预设亮度范围内。
  8. 根据权利要求7所述的背光源的调整装置，其中，所述阈值设置单元还用于在所述判断单元判断出所述第一实际最大发光亮度位于所述预设亮度范围内时，设置所述预设阈值为100％。
  9. 一种显示装置，包括如上述权利要求1-3中任一项所述的背光源。
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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105096843A (zh) * 2015-08-19 2015-11-25 京东方科技集团股份有限公司 背光源及其调整方法、调整装置和显示装置
CN107068023A (zh) * 2017-03-09 2017-08-18 北京京东方专用显示科技有限公司 测试背光源及其工作方法、显示面板的测试设备
CN107221293B (zh) * 2017-05-23 2019-09-03 广州视源电子科技股份有限公司 占空比调节电路及led背光亮度调节电路
CN111462691A (zh) * 2020-05-13 2020-07-28 京东方科技集团股份有限公司 亮度调节方法及亮度调节装置、显示装置
CN112382241B (zh) * 2020-11-10 2022-03-25 昆山龙腾光电股份有限公司 背光驱动电路、背光驱动控制方法及显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101137262A (zh) * 2006-08-30 2008-03-05 精工爱普生株式会社 发光元件驱动装置及其驱动方法
CN101266345A (zh) * 2007-03-14 2008-09-17 奇美电子股份有限公司 背光模块及其驱动方法以及液晶显示装置
CN101656049A (zh) * 2008-08-18 2010-02-24 北京京东方光电科技有限公司 背光源亮度控制装置及其方法
JP2010205530A (ja) * 2009-03-03 2010-09-16 Harison Toshiba Lighting Corp 多色光源照明システムおよびバックライト装置
CN103369765A (zh) * 2012-03-30 2013-10-23 艾默生过程控制流量技术有限公司 发光二极管驱动装置和方法
CN105096843A (zh) * 2015-08-19 2015-11-25 京东方科技集团股份有限公司 背光源及其调整方法、调整装置和显示装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4015965B2 (ja) * 2003-04-01 2007-11-28 株式会社Ｈｄｔ Ｌｅｄ駆動装置及びｌｅｄ駆動方法
US7425801B2 (en) 2003-04-01 2008-09-16 Hunet Display Technology Inc. LED driving device for multiple color LED displays
CN101800027A (zh) * 2010-01-20 2010-08-11 深圳市显科科技有限公司 一种户外高亮度led显示屏的亮度调节方法
US8547407B2 (en) * 2010-10-05 2013-10-01 Synaptics Incorporated Backlight control method and apparatus for high brightness contrast images
CN102467861A (zh) * 2010-11-05 2012-05-23 英业达股份有限公司 亮度调整方法及应用该方法的电子装置
US9076357B2 (en) * 2012-11-16 2015-07-07 Apple Inc. Redundant operation of a backlight unit of a display device under a shorted LED condition
JP5657058B2 (ja) 2013-06-14 2015-01-21 Eizo株式会社 マルチモニタシステム、マルチモニタシステムで使用されるコンピュータプログラム、及び表示装置
CN104715736B (zh) * 2013-12-16 2018-02-23 炬芯（珠海）科技有限公司 一种电子设备的背光自动调节方法及装置
CN104681007B (zh) * 2015-03-16 2018-05-01 南京巨鲨显示科技有限公司 一种实时性多阶亮度稳定系统的工作方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101137262A (zh) * 2006-08-30 2008-03-05 精工爱普生株式会社 发光元件驱动装置及其驱动方法
CN101266345A (zh) * 2007-03-14 2008-09-17 奇美电子股份有限公司 背光模块及其驱动方法以及液晶显示装置
CN101656049A (zh) * 2008-08-18 2010-02-24 北京京东方光电科技有限公司 背光源亮度控制装置及其方法
JP2010205530A (ja) * 2009-03-03 2010-09-16 Harison Toshiba Lighting Corp 多色光源照明システムおよびバックライト装置
CN103369765A (zh) * 2012-03-30 2013-10-23 艾默生过程控制流量技术有限公司 发光二极管驱动装置和方法
CN105096843A (zh) * 2015-08-19 2015-11-25 京东方科技集团股份有限公司 背光源及其调整方法、调整装置和显示装置

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