WO2019015218A1 - 对极电压调整系统及调整方法以及投影设备 - Google Patents

对极电压调整系统及调整方法以及投影设备 Download PDF

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Publication number
WO2019015218A1
WO2019015218A1 PCT/CN2017/114714 CN2017114714W WO2019015218A1 WO 2019015218 A1 WO2019015218 A1 WO 2019015218A1 CN 2017114714 W CN2017114714 W CN 2017114714W WO 2019015218 A1 WO2019015218 A1 WO 2019015218A1
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Prior art keywords
voltage
current
signal
voltage difference
projected image
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French (fr)
Inventor
张正德
周波
黄中
曾波
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor

Definitions

  • the present invention relates to the field of optics, and in particular, to a display screen image flicker automatic adjustment system, an adjustment method, and a projection apparatus.
  • LCD projectors usually use an AC LCD display, which has the advantages of fast response speed and reduced image tailing.
  • the positive and negative half-week difference of the alternating voltage may cause image flicker. Therefore, it is necessary to manually adjust the counter voltage during the manufacturing process so that the difference is as small as possible.
  • the adjustment accuracy is poor, the image flickers, and the quality is degraded.
  • the present invention provides a display flicker automatic adjustment system, an adjustment method, and a projection apparatus to solve the problem that the manual adjustment of the counter voltage is not high and the efficiency is low in the prior art.
  • Providing a pole voltage adjustment system including:
  • a detector configured to detect a flicker signal of the projected image on the projection screen by an interval preset length, and convert the flicker signal of the detected projection image into a voltage signal
  • a processor configured to receive the converted voltage signal, analyze the voltage signal to obtain a maximum and a minimum of a counter voltage of a positive and negative half cycle of the alternating voltage, and according to a maximum value and a minimum value of the opposite pole voltage Calculating the current counter voltage difference;
  • an adjustment module configured to adjust a current pole voltage difference value of the projected image when the current pole voltage difference is greater than a preset value ⁇ .
  • the projection screen is an LCD display screen.
  • the adjustment module is further configured to: when the current pole voltage difference is less than or equal to a preset value,
  • one technical solution adopted by the present invention is to provide a projection apparatus including the opposite pole voltage adjustment system as described above.
  • a technical solution adopted by the present invention is: Providing a method for adjusting a pole voltage, which performs an adjustment of a counter voltage by using a counter voltage adjustment system as described above, the counter voltage
  • the adjustment system includes a detector, a processor and a conditioning module, and the method comprises the following steps:
  • detecting step detecting, by using the detector interval, a blinking signal of the projected image on the projection screen, and converting the detected blinking signal of the projected image into a voltage signal;
  • an analysis step receiving, by the processor, the converted voltage signal, analyzing the voltage signal to obtain a maximum and a minimum of a counter voltage of a positive and negative half cycle of the alternating voltage, and according to a maximum value of the opposite pole voltage And minimum value to calculate the current pole voltage difference;
  • adjusting step adjusting, by the adjusting module, a current pole voltage difference of the projected image when the current pole voltage difference is greater than a preset value ⁇ until the current pole voltage difference is less than or equal to default value
  • the preset length is 50 mS.
  • the step of initializing the processor is further included.
  • the adjusting step comprises:
  • the beneficial effects of the present invention are: Different from the prior art, the present invention provides a display image image flicker automatic adjustment system and an adjustment method, and a projection device, which detects an image by a detector instead of a human eye.
  • the large flashing not only high precision, but also high efficiency, has a good user experience.
  • DRAWINGS 1 is a schematic structural view of a counter voltage adjustment system of the present invention
  • FIG. 2 is a flow chart showing the detection of the pole voltage adjustment system of the present invention.
  • the present invention provides a display flicker automatic adjustment system, an adjustment method, and a projection apparatus to solve the problem that the manual adjustment of the counter voltage is not high and the efficiency is low.
  • the counter voltage adjustment system of the present invention includes an imaging module 1, a detector 2, a processor 3, and an adjustment module 4.
  • the imaging module 1 includes a projection device 11 and a projection screen 12.
  • the projection device 11 is used for image generation and forms a projection image on the projection screen 12.
  • the projection screen 12 is an LCD display.
  • the detector 2 is configured to detect a flicker signal of the projection image on the projection screen by a preset length, and convert the flicker signal of the detected projection image into a voltage signal, and transmit it to the processor 3, and start the processor 3 to perform Analysis of this voltage signal.
  • the detector can be a photosensor, or other sensor that senses an image flicker signal.
  • the processor 3 is electrically connected to the imaging module 1 and the detector 2, and is configured to receive the converted voltage signal transmitted by the detector 2, and analyze the voltage signal to obtain the maximum value of the opposite pole voltage of the positive and negative half cycles of the alternating voltage. And the minimum value, and calculate the current counter voltage difference according to the maximum and minimum values of the pole voltage.
  • the processor 3 specifically includes a plurality of submodules such as a data processing submodule, a data storage submodule, and an instruction module.
  • the adjustment module 4 is connected to the processor 3, and is configured to adjust a current pole voltage difference value of the projected image when the current pole voltage difference is greater than a preset value.
  • the processor 3 analyzes the voltage value picked up by the detector and controls the adjustment module to adjust the projected image.
  • the specific method for adjusting the pole voltage of the present invention is completed by using the above-mentioned counter voltage adjustment system, and the specific steps include:
  • device initialization initializing the processor, clearing the original data, specifically clearing the data storage sub-module;
  • detecting step detecting, by using a detector interval, a blinking signal of the projected image on the projection screen, and converting the detected blinking signal of the projected image into a voltage signal; wherein the preset length is 50 mS, that is, each At 50 mS intervals, the signals are sequentially extracted and converted into voltage signals.
  • Analysis step receiving, by the processor, a voltage signal transmitted to the processor after the detector is converted, and analyzing the voltage signal to obtain a maximum and a minimum value of the opposite pole voltage of the positive and negative half cycles of the alternating voltage, and according to the opposite pole The maximum value and the minimum value of the voltage are used to calculate the current pole voltage difference; and the adjustment module adjustment method is selected according to the current trend of the pole voltage difference;
  • adjusting step adjusting, by using the adjustment module, the current pole voltage difference is greater than a preset value ⁇ , adjusting a current pole voltage difference of the projected image until the current pole voltage difference is less than or equal to a preset value, at the current The pole voltage difference is less than or equal to the preset value ⁇ , maintaining the current pole voltage difference of the current projected image; repeating the above steps, so that the difference of the pole voltage is as small as possible, so small that it cannot be small.
  • the adjustment ends, and this is the best effect of the projected image.
  • the present invention provides a display image image flicker automatic adjustment system, an adjustment method, and a projection device.
  • the detector is replaced by a human eye to detect a flicker caused by a too large pole voltage, which is not only highly accurate but also highly efficient. A better user experience.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

一种用于显示屏图像闪烁的对极电压调整系统及调整方法以及投影设备，对极电压调整系统包括，检测器（2），用于间隔预设时长检测投影屏幕（12）上的投影图像的闪烁信号，并把检测到的投影图像的闪烁信号转换为电压信号；处理器（3），用于接收转换后的电压信号，分析电压信号以获取交变电压正负半周的对极电压最大值及最小值，并依据对极电压最大值及最小值计算当前对极电压差值；调整模块（4），用于在当前对极电压差值大于预设值时，调整投影图像的当前对极电压差值。通过检测器（2）代替人眼检测图像因对极电压太大带来的闪烁，不仅精度高，而效率高，具有较好的用户体验。

Description

对极电压调整系统及调整方法以及投影设备 技术领域
[0001] 本发明涉及光学领域， 尤其是涉及一种显示屏图像闪烁自动调整系统及调整方 法以及投影设备。
背景技术
[0002] LCD投影仪通常采用交流 LCD显示屏， 其优点是响应速度快， 减小图像拖尾现 象， 交流 LCD屏工作过程中， 其交变电压正负半周差值过大可能造成图像闪烁 ， 因此， 在制造过程中需要人工调整其对极电压， 使其差值越小越好。
技术问题
[0003] 人工调整对极电压有精度不高， 长期工作对工人眼睛有一定影响， 且效率很低
。 且调整精度差， 图像闪烁， 品质下降。
[0004] 因此， 实有必要提供一种新的显示屏闪烁自动调整系统及调整方法以及投影设 备以解决上述问题。
问题的解决方案
技术解决方案
[0005] 本发明提供一种显示屏闪烁自动调整系统及调整方法以及投影设备以解决现有 技术中人工调整对极电压有精度不高， 效率很低的问题。
[0006] 为解决上述技术问题， 本发明采用的一个技术方案是： 提供一种对极电压调整 系统， 包括：
[0007] 检测器， 用于间隔预设吋长检测投影屏幕上的投影图像的闪烁信号， 并把检测 到的投影图像的闪烁信号转换为电压信号；
[0008] 处理器， 用于接收所述转换后的电压信号， 分析所述电压信号以获取交变电压 正负半周的对极电压最大值及最小值， 并依据对极电压最大值及最小值计算当 前对极电压差值； 及
[0009] 调整模块， 用于在所述当前对极电压差值大于预设值吋， 调整所述投影图像的 当前对极电压差值。 优选的， 所述投影屏幕为 LCD显示屏。 [0010] 优选的， 所述调整模块， 还用于在所述当前对极电压差值小于或等于预设值吋
， 维持当前投影图像的当前对极电压差值。
[0011] 为解决上述技术问题， 本发明还采用的一个技术方案是： 提供一种投影设备， 包括如上所述的对极电压调整系统。
[0012] 为解决上述技术问题， 本发明采用的一个技术方案是： 提供一种对极电压调整 方法， 利用如上所述的对极电压调整系统来执行对极电压的调整， 所述对极电 压调整系统包括检测器、 处理器及调理模块， 该方法包括如下步骤：
[0013] 检测步骤： 利用所述检测器间隔预设吋长检测投影屏幕上的投影图像的闪烁信 号， 并把检测到的投影图像的闪烁信号转换为电压信号；
[0014] 分析步骤： 利用所述处理器接收所述转换后的电压信号， 分析所述电压信号以 获取交变电压正负半周的对极电压最大值及最小值， 并依据对极电压最大值及 最小值计算当前对极电压差值； 及
[0015] 调整步骤： 利用所述调整模块在所述当前对极电压差值大于预设值吋， 调整所 述投影图像的当前对极电压差值直至所述当前对极电压差值小于或等于预设值
， 并重复上述步骤。
[0016] 优选的， 所述预设吋长为 50mS。
[0017] 优选的， 在检测器检测投影图像的闪烁信号之前， 还包括初始化处理器的步骤 [0018] 优选的， 所述调整步骤包括：
[0019] 利用所述调整模块在所述当前对极电压差值小于或等于预设值吋， 维持当前投 影图像的当前对极电压差值。
发明的有益效果
有益效果
[0020] 本发明的有益效果是： 区别于现有技术的情况， 本发明提供一种显示屏图像闪 烁自动调整系统及调整方法以及投影设备， 通过检测器代替人眼检测图像因对 极电压太大带来的闪烁， 不仅精度高， 而效率高， 具有较好的用户体验。
对附图的简要说明
附图说明 [0021] 图 1是本发明对极电压调整系统的结构示意图；
[0022] 图 2是本发明对极电压调整系统的检测流程图。
本发明的实施方式
[0023] 应当理解， 此处所描述的具体实施例仅仅用以解释本发明， 并不用于限定本发 明。
[0024] 本发明提供一种显示屏闪烁自动调整系统及调整方法以及投影设备以解决现有 技术中人工调整对极电压有精度不高， 效率很低的问题。
[0025] 请参阅图 1， 本发明的对极电压调整系统包括成像模组 1、 检测器 2、 处理器 3和 调整模块 4。
[0026] 成像模组 1包括投影装置 11和投影屏幕 12。 投影装置 11用于图像的生成， 并在 投影屏幕 12上形成投影图像。 其中投影屏幕 12为 LCD显示屏。
[0027] 检测器 2用于间隔预设吋长检测投影屏幕上的投影图像的闪烁信号， 并把检测 到的投影图像的闪烁信号转换为电压信号， 传输给处理器 3， 启动处理器 3进行 该电压信号的分析。 所述检测器可以是光敏传感器， 或者其它可感测图像闪烁 信号的感应器。
[0028] 处理器 3与成像模组 1和检测器 2电连接， 用于接收检测器 2传输过来的转换后的 电压信号， 分析电压信号以获取交变电压正负半周的对极电压最大值及最小值 ， 并依据对极电压最大值及最小值计算当前对极电压差值。 处理器 3具体包括数 据处理子模块、 数据存储子模块和指令模块等多个子模块。
[0029] 调整模块 4与处理器 3相连， 用于在当前对极电压差值大于预设值吋， 调整投影 图像的当前对极电压差值。
[0030] 当检测器 2检测到图像闪烁吋将信号传递给处理器 3， 处理器 3分析检测器拾取 的电压值， 并控制调整模块调整投影图像。
[0031] 如图 2所示， 本发明具体的对极电压调整方法， 为利用上述的对极电压调整系 统完成， 具体步骤包括：
[0032] 设备初始化： 对处理器进行初始化， 清除原有数据， 具体为对数据存储子模块 进行清零； [0033] 检测步骤： 利用检测器间隔预设吋长检测投影屏幕上的投影图像的闪烁信号， 并把检测到的投影图像的闪烁信号转换为电压信号； 其中预设吋长为 50mS， 即 每隔 50mS， 提取依次闪烁信号， 并转换为电压信号。
[0034] 分析步骤： 利用所述处理器接收检测器转换后传输给处理器的电压信号， 分析 该电压信号以获取交变电压正负半周的对极电压最大值及最小值， 并依据对极 电压最大值及最小值计算当前对极电压差值； 并根据当前对极电压差值的变化 趋势选择调整模块调整方法；
[0035] 调整步骤： 利用调整模块在当前对极电压差值大于预设值吋， 调整投影图像的 当前对极电压差值直至所述当前对极电压差值小于或等于预设值， 在当前对极 电压差值小于或等于预设值吋， 维持当前投影图像的当前对极电压差值； 反复 进行上述步骤， 以期对极电压的差值尽可能的变小， 小到不能再小为止， 当对 极电压的差值达到最小并幵始变大吋， 调整结束， 此吋的为投影图像的最佳效 果。
[0036] 重复上述步骤。
[0037] 本发明提供一种显示屏图像闪烁自动调整系统及调整方法以及投影设备， 通过 检测器代替人眼检测图像因对极电压太大带来的闪烁， 不仅精度高， 而效率高 ， 具有较好的用户体验。
[0038] 以上所述仅为本发明的实施例， 并非因此限制本发明的专利范围， 凡是利用本 发明说明书及附图内容所作的等效结构或等效流程变换， 或直接或间接运用在 其他相关的技术领域， 均同理包括在本发明的专利保护范围内。

Claims

权利要求书
1.一种对极电压调整系统， 其特征在于， 包括：
检测器， 用于间隔预设吋长检测投影屏幕上的投影图像的闪烁信号， 并把检测到的投影图像的闪烁信号转换为电压信号；
处理器， 用于接收所述电压信号， 分析所述电压信号以获取交变电压 正负半周的对极电压最大值及最小值， 并依据对极电压最大值及最小 值计算当前对极电压差值； 及
调整模块， 用于在所述当前对极电压差值大于预设值吋， 调整所述投 影图像的当前对极电压差值。
2.根据权利要求 1所述的对极电压调整系统， 其特征在于， 所述投影 屏幕为 LCD显示屏。
3.根据权利要求 1所述的对极电压调整系统， 其特征在于， 所述调整 模块， 还用于在所述当前对极电压差值小于或等于预设值吋， 维持当 前投影图像的当前对极电压差值。
4.一种投影设备， 其特征在于， 包括如权利要求 1到 3任意一项所述的 对极电压调整系统。
5.—种对极电压调整方法， 其特征在于， 利用如权利要求 1到 3任意一 项所述的对极电压调整系统来执行对极电压的调整， 所述对极电压调 整系统包括检测器、 处理器及调理模块， 该方法包括如下步骤： 检测步骤： 利用所述检测器间隔预设吋长检测投影屏幕上的投影图像 的闪烁信号， 并把检测到的投影图像的闪烁信号转换为电压信号； 分析步骤： 利用所述处理器接收所述转换后的电压信号， 分析所述电 压信号以获取交变电压正负半周的对极电压最大值及最小值， 并依据 对极电压最大值及最小值计算当前对极电压差值； 及
调整步骤： 利用所述调整模块在所述当前对极电压差值大于预设值吋 ， 调整所述投影图像的当前对极电压差值直至所述当前对极电压差值 小于或等于预设值， 并重复上述步骤。
6.根据权利要求 5所述对极电压调整方法， 其特征在于， 所述预设吋 长为 50mS。
[权利要求 7] 7.根据权利要求 5所述对极电压调整方法， 其特征在于， 在检测器检 测投影图像的闪烁信号之前， 还包括初始化处理器的步骤。
[权利要求 8] 根据权利要求 5所述对极电压调整方法， 其特征在于， 所述调整步骤 还包括：
利用所述调整模块在所述当前对极电压差值小于或等于预设值吋， 维 持当前投影图像的当前对极电压差值。
PCT/CN2017/114714 2017-07-17 2017-12-06 对极电压调整系统及调整方法以及投影设备 Ceased WO2019015218A1 (zh)

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