CN115064137A - 一种led阵列背光系统分区控制方法 - Google Patents

一种led阵列背光系统分区控制方法 Download PDF

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CN115064137A
CN115064137A CN202210843735.5A CN202210843735A CN115064137A CN 115064137 A CN115064137 A CN 115064137A CN 202210843735 A CN202210843735 A CN 202210843735A CN 115064137 A CN115064137 A CN 115064137A
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傅强
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • 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
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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Abstract

本发明提供的分区控制方法可以精确的控制以正六边形菲涅尔透镜单元组成的LED背光阵列按需要点亮LED单元，节省功耗、降低温度并提高低照度背景下的视觉效果。

Description

一种LED阵列背光系统分区控制方法
技术领域
矩阵LED背光分区控制方法，软件。
背景技术
传统直下式矩阵LED背光使用时必须全部点亮LED单元，存在耗电大、温度高的问题，对其分区控制以降低功耗是未来尤其是在HUD设备应用中的新要求。
发明内容
本发明提供的分区控制方法可以精确的控制以正六边形菲涅尔透镜单元组成的LED背光阵列按需要点亮LED单元，节省功耗、降低温度并提高低照度背景下的视觉效果。
以正六边形菲涅尔透镜单元组成的阵列直下式LED背光控制方法，其特征在于通过计算获得方形图像块所覆盖的所述透镜单元数量与位置，达到精确控制功耗的目的，所述控制方法具体为：
步骤一：以所述正六边形菲涅尔透镜单元组成的阵列的左上角为原点建立坐标系，对该阵列沿X轴方向从0开始对列编号，分为偶数列和奇数列；对所述阵列沿Y轴方向从0开始对行编号，如果对位于所述偶数列和奇数列的行分别编号则组成奇数阵和偶数阵，否则为单一阵；
步骤二：在X轴方向按所述正六边形对角顶点距离的四分之一长度Xpatch进行分区，分区编号从0开始随X轴方向增大，其中能被3整除的所述分区编号所在的分区为阵列的垂直交错区，其他为垂直非交错区；在Y轴方向按所述正六边形对边距离的二分之一长度为Ypatch；
步骤三：当方形图像块的顶点的X坐标位于所述垂直交错区时，该区包含的所述阵列的相邻两列均为选中列，所述顶点的X坐标位于所述垂直非交错区时，则只有该区对应的单列为选中列，所述选中列构成需要的开始列和结束列；
步骤四：如果所述偶数列相比所述奇数列更靠近X轴，当所述开始列或结束列为所述偶数列时，对应的所述方形图像块的顶点的Y坐标除以2倍所述Ypatch的整数结果即为选中行；当所述开始列或结束列为所述奇数列时，对应的所述方形图像块的顶点的Y坐标减去Ypatch以后再除以2倍所述Ypatch的整数结果也为选中行，所述选中行构成开始行和结束行；如果所述偶数列相比所述奇数列更远离X轴，计算所述选中行的方法则反之；
步骤五：按以上步骤所获得的所述开始列、结束列、开始行、结束行所包围的所述透镜单元即为所有可能单元，其中四个顶角单元和位于所述开始行与结束行的部分单元需要确认是否去除；如果所述偶数列相比所述奇数列更靠近X轴，当位于所述开始行的所述顶角单元其中心坐标的Y坐标小于相邻且不同列的所述可能单元时，或者当位于所述结束行的所述顶角单元其中心坐标的Y坐标大于相邻且不同列的所述可能单元时，如果该顶角单元中心与对应的所述方形图像块的顶点的距离大于所述相邻单元与该顶点的距离，则从所述可能单元中去除；如果所述偶数列相比所述奇数列更远离X轴，去除所述可能单元的方法则反之；
步骤六：对于所述单一阵，如果所述开始行与结束行所包含的所述可能需要单元的中心坐标的Y坐标与距离相近的所述方形图像块的顶点的Y坐标的差值大于所述Ypatch，则去除该单元；对于行数分别编号的所述奇数阵和偶数阵，无需此计算。
附图说明
构成本发明的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示
意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。
图1是本发明实施例的垂直分区编号图。
图2是本发明实施例的单一阵行编号图。
图3是本发明实施例的奇偶阵行编号图。
图4是本发明实施例的图像块覆盖行列与单元确认图。
标号的说明
101液晶屏显示区域、102方形图像块、103正六边形菲涅尔透镜单元阵列、104垂直分区编号、105垂直交错区、106坐标系、107 Xpatch(正六边形对角顶点距离的四分之一长度)、108单一阵行编号、109 Ypatch(正六边形对边距离的二分之一长度)、110奇数阵行编号、111偶数阵行编号、112 Lb(方形图像块顶点与对应顶角单元的距离)、113 La(方形图像块顶点与对应顶角单元的相邻但非同列的单元的距离)、114 Xshift(X轴向偏移区)、115Ycompensate(Y轴向补偿区)。
具体实施方式
为了能清楚说明本发明的技术特点，下面通过具体实施方式，并结合其附图，对本
发明进行详细阐述。术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
如图四所示，一般而言，液晶屏显示区域101与正六边形菲涅尔透镜单元阵列103并不能对齐完全覆盖，本实施例为了方便计算所需行列，需要标明图四中Xshift 114与Ycompensate 115。
步骤一：图二显示了奇数列和偶数列相邻行统一编号的单一阵结构，图三显示了奇数列和偶数列的行分别编号形成奇数阵和偶数阵结构。
步骤二：图一显示了坐标系106 与X轴向按Xpatch 107垂直分区并编号的结构。
步骤三：方形图像块102的左上和右上顶点的X坐标减去Xshift 114以后除以Xpatch 107的整数结果即为所需垂直分区编号 104，如果该编号能被3整除则其对应的分区为垂直交错区104，该区对应的相邻列均为选中列，本步骤全部计算完后的最左列为开始列，最右列为结束列。
步骤四：对于所述步骤三获得的开始列和结束列，如果其为偶数列，方形图像块102的上顶点和下顶点的Y坐标加上Ycompensate 115后除以2倍Ypatch 109的整数结果即为所需单一阵行编号108或偶数阵行编号111的开始行与结束行；如果其为奇数列，方形图像块102的上和下顶点的Y坐标加上Ycompensate 115后减去Ypatch 109再除以2倍Ypatch109的整数结果即为所需单一阵行编号108或偶数阵行编号111的开始行与结束行。
步骤五：按以上步骤所获得的所述开始列、结束列、开始行、结束行所包围的所述透镜单元即为所有可能单元；计算4组La 113和 Lb 112，如果La 113大于Lb 112则排除该顶角单元。
步骤六：如果采用单一阵行编号108，由步骤四所得开始行与结束行所包含的透镜单元的中心坐标的Y坐标与距离相近的方形图像块102的顶点的Y坐标的差值大于Ypatch109，则去除该单元。

Claims (1)

1.以正六边形菲涅尔透镜单元组成的阵列直下式LED背光控制方法，其特征在于通过计算获得方形图像块所覆盖的所述透镜单元数量与位置，达到精确控制功耗的目的，所述控制方法具体为：
步骤一：以所述正六边形菲涅尔透镜单元组成的阵列的左上角为原点建立坐标系，对该阵列沿X轴方向从0开始对列编号，分为偶数列和奇数列；对所述阵列沿Y轴方向从0开始对行编号，如果对位于所述偶数列和奇数列的行分别编号则组成奇数阵和偶数阵，否则为单一阵；
步骤二：在X轴方向按所述正六边形对角顶点距离的四分之一长度Xpatch进行分区，分区编号从0开始随X轴方向增大，其中能被3整除的所述分区编号所在的分区为阵列的垂直交错区，其他为垂直非交错区；在Y轴方向按所述正六边形对边距离的二分之一长度为Ypatch；
步骤三：当方形图像块的顶点的X坐标位于所述垂直交错区时，该区包含的所述阵列的相邻两列均为选中列，所述顶点的X坐标位于所述垂直非交错区时，则只有该区对应的单列为选中列，所述选中列构成需要的开始列和结束列；
步骤四：如果所述偶数列相比所述奇数列更靠近X轴，当所述开始列或结束列为所述偶数列时，对应的所述方形图像块的顶点的Y坐标除以2倍所述Ypatch的整数结果即为选中行；当所述开始列或结束列为所述奇数列时，对应的所述方形图像块的顶点的Y坐标减去Ypatch以后再除以2倍所述Ypatch的整数结果也为选中行，所述选中行构成开始行和结束行；如果所述偶数列相比所述奇数列更远离X轴，计算所述选中行的方法则反之；
步骤五：按以上步骤所获得的所述开始列、结束列、开始行、结束行所包围的所述透镜单元即为所有可能单元，其中四个顶角单元和位于所述开始行与结束行的部分单元需要确认是否去除；如果所述偶数列相比所述奇数列更靠近X轴，当位于所述开始行的所述顶角单元其中心坐标的Y坐标小于相邻且不同列的所述可能单元时，或者当位于所述结束行的所述顶角单元其中心坐标的Y坐标大于相邻且不同列的所述可能单元时，如果该顶角单元中心与对应的所述方形图像块的顶点的距离大于所述相邻单元与该顶点的距离，则从所述可能单元中去除；如果所述偶数列相比所述奇数列更远离X轴，去除所述可能单元的方法则反之；
步骤六：对于所述单一阵，如果所述开始行与结束行所包含的所述可能需要单元的中心坐标的Y坐标与距离相近的所述方形图像块的顶点的Y坐标的差值大于所述Ypatch，则去除该单元；对于行数分别编号的所述奇数阵和偶数阵，无需此计算。
CN202210843735.5A 2022-07-19 2022-07-19 一种led阵列背光系统分区控制方法 Pending CN115064137A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117253448A (zh) * 2023-11-16 2023-12-19 深圳市连硕显电子有限公司 Led显示屏校正方法及系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117253448A (zh) * 2023-11-16 2023-12-19 深圳市连硕显电子有限公司 Led显示屏校正方法及系统
CN117253448B (zh) * 2023-11-16 2024-05-14 深圳市连硕显电子有限公司 Led显示屏校正方法及系统

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