WO2015085656A1 - 计算过驱动目标值的方法 - Google Patents
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- WO2015085656A1 WO2015085656A1 PCT/CN2014/070052 CN2014070052W WO2015085656A1 WO 2015085656 A1 WO2015085656 A1 WO 2015085656A1 CN 2014070052 W CN2014070052 W CN 2014070052W WO 2015085656 A1 WO2015085656 A1 WO 2015085656A1
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- brightness
- overdrive
- target value
- time
- response curve
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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
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/18—Timing circuits for raster scan displays
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0252—Improving the response speed
Definitions
- the present invention relates to the field of display technologies, and in particular, to a method for calculating an overdrive target value. Background technique
- Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
- Most of the liquid crystal display devices on the market are backlight type liquid crystal display devices, which include a liquid crystal display panel and a backlight module.
- the working principle of the liquid crystal display panel is to place a liquid crystal material in two parallel glass substrates, and control the liquid crystal molecules in the liquid crystal material to change direction by applying a driving voltage on the two glass substrates, and refract the light of the backlight module to generate a picture. .
- LCD response time is an important parameter to identify the quality of liquid crystal display devices.
- ISO ISO 13406-2
- the response time of liquid crystals When a pixel changes from white to black, the pixel electrode voltage changes from 0 to the maximum value. When the maximum voltage is condensed, the liquid crystal molecules are quickly switched to the new position. The time used in this process is called the rising time period. When a pixel turns from black to white, the voltage applied to the pixel electrode is cut off, and the liquid crystal molecules quickly return to the plus. The pre-electric position, this process is called the fall time.
- the ⁇ process of the entire liquid crystal response is the value obtained by the rise time plus the fall time. From the principle of gray scale technology, the response time is essentially the twisting speed of liquid crystal molecules. To make liquid crystal molecules move faster, there are generally three ways to increase the twisting speed of liquid crystal molecules:
- the torsional speed of the liquid crystal molecules is related to the voltage. The higher the voltage, the faster the twisting speed of the liquid crystal molecules.
- Liquid crystal material viscosity degree method The more viscous liquid crystal material, the more laborious it is driven. If the liquid crystal material is diluted, it is easier to drive the twist, and the response time can naturally be improved. However, after the liquid crystal material is diluted, it will affect its light control ability. Although the response time is improved, the cost of # is very large: the lower the viscosity of the liquid crystal material, the more faint the color of the picture, the more blurred the image details, and the more A slight light leakage phenomenon. This is also the LG Group's initial use only on its Super In-Plane Switching (S-IPS) board. One of the important reasons for the order technology.
- S-IPS Super In-Plane Switching
- the current gray-scale response time reduction depends on the pressurization, and the panel manufacturer (such as AUO) expresses the overdrive (Over Drive, OD) technology.
- the overdrive Over Drive, OD
- the torsional speed of the liquid crystal molecules is much faster under the overdrive than without the overdrive.
- the overdrive table is filled in. It relies on the engineer to try to determine whether the brightness time response curve has been overdriven by trying different over drive signals, usually with the first +1 frame. (Frame) brightness curve adjustment level is appropriate, as shown in Figure 3, this method relies on the engineer's visual observation, and after many attempts to get the method of driving the table requires a lot of time and manpower, and low efficiency.
- the object of the present invention is to provide a method for calculating an overdrive target value, which can automatically calculate an overdrive target value in an overdrive table, save manpower, improve efficiency, and can better conform to the principle of overdrive technology, and The overdrive effect is good.
- the present invention provides a method of calculating an overdrive target value, comprising the steps of:
- Step 1 Perform four-frame dynamic switching according to a starting gray level and a ending gray level of a table in the driving table to be filled, and the four frames include first to fourth frames;
- Step 2 Try to drive the target value to obtain the R/G/B brightness-time response curve of the overdrive target value;
- Step 3 Perform noise reduction smoothing processing on the R/G/B luminance-time response curve obtained in step 2;
- Step 4 using the brightness value of the third frame in step 1 as the target brightness, determining whether the brightness in the /G/B brightness time response curve of the overdrive target value matches the target brightness, and if yes, proceeding to step 5, Otherwise repeat steps 2 to 4;
- Step 5 If the brightness in the R/G/B brightness-time response curve of the overdrive target value of the attempt is the brightness that matches the target brightness for the first time, fill the overdrive target value to be filled in. Overdrive the corresponding position in the table, and repeat steps 2 to 4; if the brightness of the R/G/B brightness-time response curve of the overdrive target value of the attempt is not the first brightness matching the target brightness, Then compare the response time of the RZG/B brightness time response curve worthy of the overdrive target of the attempt and the R/G/B brightness time response curve of the overdrive target value of the corresponding position in the drive table to be filled out. Response time, go to step 6; Step 6.
- Step 7 Repeat steps 1 through 6, until you have completed the calculation of all overdrive target values in the drive table.
- the driver table to be filled in is a 17*17 overdrive table, and each of the steps is repeated according to the at least one of the starting grayscale and the ending grayscale of the table to be filled in the driving table.
- the overdrive target value tried each time step 2 is repeated. According to the repetition order, the overdrive target values in the step 2 are tried in ascending order.
- the overdrive target values in the step 2 are tried in descending order.
- step 3 the median filter is used to perform noise reduction and smoothing on the R/G/B luminance-time response curve obtained in step 2.
- the maximum value of the brightness matching the target brightness in the step 4 should be less than 105% of the target brightness.
- the minimum value of the brightness matching the target brightness in the step 4 should be greater than 95% of the target brightness.
- the step 5 determines the overdrive target value by comparing the original number of the R/G/B luminance-time response curve.
- the brightness value of the third pass is 3000 lumens.
- the present invention also provides a method for calculating an overdrive target value, comprising the following steps: Step 1. Perform four-frame dynamic switching according to a starting grayscale and a ending grayscale of a table in the driving table to be filled, the four frames Including first to fourth ⁇ ;
- Step 2 Try to pass the drive target value to obtain the R/G/B brightness-time response curve of the overdrive target value;
- Step 3 Perform noise reduction smoothing processing on the R/GZB luminance time response curve obtained in step 2;
- Step 4 determining, by using the brightness value of the third frame in the step as the target brightness, whether the brightness in the R/G/B brightness-time response curve of the overdrive target value matches the target brightness, and if Match to step 5, otherwise repeat steps 2 to 4;
- Step 5 If the brightness in the R/G/B brightness-time response curve of the overdrive target value of the attempt is the first brightness matching the target brightness, the overdrive target value is filled in to be filled in. Drive the corresponding position in the table, and repeat steps 2 to 4; if the brightness in the R/G/B brightness-time response curve of the overdrive target value of the attempt is not the first brightness matching the target brightness, then Comparing the response time of the R/G/B brightness-time response curve worthy of the overdrive target of the attempt with the R/GZB brightness time response curve of the overdrive target value of the corresponding position in the drive table to be filled out Response time, go to step 6;
- Step 6 When the response time of the R/G/B luminance time response curve worthy of the overdrive target of the attempt is greater than the R/G/B of the overdrive target value of the corresponding position in the drive table to be filled out
- the overdrive target value of the corresponding position in the drive table to be filled is replaced with the overdrive target value of the attempt, and steps 2 to 5 are repeated; when the attempt is made
- the response time of the R/G/B brightness-time response curve of the drive target is more than the response time of the R/G/B brightness-time response curve attempted by the overdrive target value of the corresponding position in the drive table to be filled out.
- the overdrive target value to be filled in the corresponding position in the drive table is taken as the overdrive target value finally determined by the corresponding position, and the process proceeds to step 7;
- Step 7 Repeat steps I through 6, until you have completed the calculation of all overdrive target values in the drive table.
- the driving table to be filled in is a 17*17 overdrive table, and each time the step 1 is repeated, the starting grayscale and the ending grayscale of the table to be filled in the driving table are at least one different; Repeat the step 2 to try the overdrive target value differently;
- the overdrive target values in the step 2 are tried in an order from small to large;
- step 3 the median filter is used to perform noise reduction smoothing on the R/G/B luminance-time response curve obtained in step 2.
- the maximum value of the brightness matching the target brightness in the step 4 should be less than 105% of the target brightness.
- the minimum value of the brightness matching the target brightness in step 4 should be greater than 95% of the target brightness.
- the step 5 determines the overdrive target value by comparing the raw data of the R/G/B luminance-time response curve.
- the brightness value of the third pass is 3000 lumens.
- the method for calculating the overdrive target value of the present invention determines the R/G/B brightness of the overdrive target value that meets the target brightness by attempting to drive the target value in a certain order.
- the degree-time response curve compares the response time of the R/G/B brightness-time response curve that meets the target brightness, and determines the overdrive target value from which the overdrive target value in the overdrive table can be automatically calculated, saving manpower. While improving efficiency, it can better conform to the principle of overdrive technology, and the overdrive effect is good.
- FIG. 1 is the brightness from gray scale 32 to gray scale 128 when there is no overdrive in the prior art
- FIG. 2 is a brightness-time response curve from gray scale 32 to 128 when there is overdrive in the prior art.
- FIG. 3 is a timing diagram of optical response of a liquid crystal display in the prior art
- FIG. 4 is a flow chart of a method for calculating an overdrive target value according to the present invention.
- FIG. 5 is an effect comparison diagram before and after the noise reduction smoothing process of the luminance-time response curve of red light in the present invention.
- the preferred embodiment of the detailed description and its accompanying drawings are described in detail. ' 3 ⁇ 4 r " , , ' Please refer to FIG. 4 , the present invention provides a method for calculating an overdrive target value, comprising the following steps:
- Step 1 Perform four-frame dynamic switching according to the starting gray level and the ending gray level of a table in the driving table to be filled, and the four frames include first to fourth frames.
- the drive table to be filled in is a 17*17 overdrive table, but is not limited thereto.
- the selected table is different for each iteration, that is, the starting gray scale and the ending gray scale of the table in the driving table to be filled according to each repetition are at least one different.
- the first frame is a driving signal for realizing a gray scale
- the second frame is a driving signal for realizing a gray level between a starting gray level and a ending gray level
- the third frame and the fourth frame are for implementing a gray scale.
- Drive Step 2. Try to pass the drive target value to obtain the R/G/B brightness-time response curve of the overdrive target value.
- the overdrive target values that are tried each time are different, and in the order of repetition, the overdrive target values are tried in ascending order, from small to large or from small to small, depending on the actual Need to choose.
- Step 3 Perform noise reduction smoothing processing on the R/G/B luminance time response curve obtained in step 2.
- the R/G/B luminance-time response curve obtained in step 2 is subjected to noise reduction smoothing using a median filter.
- FIG. 5 is a comparison diagram of the effect of the luminance-time response curve of the red light before and after the noise reduction smoothing process. After the median filter processing, the original measurement curve with noise can be smoothed to improve Subsequent calculation speed and accuracy of calculation.
- Step 4 The brightness value of the third frame in step 1 is used as the target brightness, and it is determined whether the brightness in the R/GZB brightness-time response curve of the overdrive target value matches the target brightness. If yes, go to step 5. , otherwise repeat steps 2 through 4.
- the brightness value of the third frame is about 3000 lumens (LM), and the rule of the brightness in the R/G/B brightness-time response curve matching the overdrive target value and the target brightness is :
- the maximum value of the brightness matching the target brightness in the step 4 should be less than 105% of the target brightness, which satisfies the requirement to achieve a low gray level to a high gray level. Better overdrive effect.
- the minimum value of the brightness matching the target brightness in the step 4 should be greater than 95% of the target brightness, which satisfies the requirement to achieve a high gray level to a low gray level. Better overdrive effect.
- Step 5 If the brightness in the R/G/B brightness time response curve of the overdrive target value of the attempt is the first brightness matching the target brightness, the overdrive target value is filled in the drive to be filled Corresponding position in the table, and repeat steps 2 to 4; if the brightness in the R/G/B brightness-time response curve of the overdrive target value of the attempt is not the first brightness matching the target brightness, then compare The R/G/B brightness-time response curve of the R/GZB brightness-time response curve of the attempted overdrive target and the overdrive target value of the corresponding position in the drive table to be filled out Response time, go to step 6.
- Step 6 When the response time of the R/G/B brightness-time response curve worthy of the overdrive target of the attempt is more than the R/G/ of the overdrive target value of the corresponding position in the drive table to be filled out B When the response time of the brightness-time response curve is small, the corresponding entry in the driver table will be filled in.
- the overdrive target value of the position is replaced with the overdrive target value of the attempt, and steps 2 to 5 are repeated; when the overdrive target of the attempt is worth the R/G/B brightness-time response curve response time ratio
- the overdrive target value of the corresponding position in the drive table to be filled in is used as the overdrive target value
- the corresponding position finally determines the overdrive target value, and proceeds to step 7.
- the overdrive target value can be determined by comparing the raw data of the initial grayscale to 32 and the target grayscale containing the R/G/B luminance-time response curve of 0-255 grayscale.
- Step 7 Repeat steps i through 6, until you have completed the calculation of all overdrive target values in the drive table.
- the present invention provides a method for calculating an overdrive target value by determining an R/G/B luminance-time response curve of an overdrive target value that meets a target luminance by attempting to drive a target value in a certain order, The response time of the R/G/B brightness-time response curve that meets the target brightness, and the overdrive target value is determined from it, so that the overdrive target value in the overdrive table can be automatically calculated, saving manpower and improving efficiency. It is in line with the principle of overdrive technology and has a good overdrive effect.
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Abstract
一种计算过驱动目标值的方法,通过按照一定顺序尝试过驱动目标值来确定符合目标亮度的过驱动目标值的R/G/B亮度-时间响应曲线,比较符合目标亮度的R/G/B亮度-时间响应曲线的响应时间,并从中确定过驱动目标值,进而可以自动计算过驱动表格中的过驱动目标值。该方法节省人力,提高效率的同时又可以较好地符合过驱动技术的原理,并且过驱动效果良好。
Description
计算过驱动目标值的方法
本发明涉及显示技术领域, 尤其涉及一种计算过驱动目标值的方法。 背景技术
液晶显示装置 ( LCD, Liquid Crystal Display )具有机身薄、 省电, 无 辐射等众多优点, 得到了广泛的应用。 现有巿场上的液晶显示装置大部分 为背光型液晶显示装置, 其包括液晶显示面板及背光模组 (backlight module ) 。 液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液 晶材料, 通过在两片玻璃基板上施加驱动电压来控制液晶材料中的液晶分 子改变方向, 将背光模组的光线折射出来产生画面。
液晶响应时间是鉴定液晶显示装置质量的一个重要参数 , ISO ( ISO 13406-2 ) 对液晶响应时间的规定是: 当一个像素点从白色转为黑 色, 像素电极电压从 0 变为最大值, 即最大电压激凝状态下, 液晶分子迅 速转换到新的位置, 这一过程所用的时间被称为上升时间段; 当一个像素 由黑转白, 像素电极所加电压切断, 液晶分子迅速回到加电前位置, 这一 过程称为下降时间。 整个液晶响应时闾过程就是由上升时间加上下降时间 而获得的数值。 从灰阶技术原理上讲起, 响应时间其实质就是液晶分子的 扭转速度, 要让液晶分子运动得更快, 一般提升液晶分子扭转速度的方法 有以下三种:
1、 增加驱动电压法: 液晶分子的扭转速度和电压有关系, 电压越 高, 液晶分子的扭转速度就越快。
2、 改变液晶分子初始状态法: 这种方法其实就是让液晶分子处于一 种不稳定的状态, 一旦有 "风吹草动" 就立即作出反应, 用以减少响应时 间。 但这个办法不能无限制的实行, 液晶分子不能太不稳定, 否则对其将
― 、 减^液晶材料粘稠程度法: 液晶材料越粘稠, 驱动起来就越费 力。 如果把液晶材料稀释一下, 驱动其扭转就比较容易了, 其响应时间自 然能有所提升。 不过液晶材料稀释以后会影响其控光能力, 响应时闾虽然 提升了, 但#出的代价却很大: 液晶材料黏稠度越低, 画面色彩越黯淡, 图像细节也会变模糊, 同时会产生轻微漏光的现象。 这一点也是 LG 集团 当.初只在其超.平面切换 ( Super In-Plane Switching, S-IPS ) 面.板上.采用灰
阶技术的重要原因之一。
鉴于上述的第 2与第 3两种方法弊端颇大, 因此目前灰阶响应时间的 减少有赖于加压, 用面板厂家 (比如友达) 的表述为过驱动 (Over Drive , OD )技术。 从图 1 及图 2 所示中可以看出, 从灰阶 32 到灰阶 128 , 液晶分子的扭转速度在有过驱动作用下比没有过驱动作用下要快很 多。
现有的多数方法中, 过驱动表格的填写是.依靠工程师通过尝试不同的 过驱动信号 ( Over drive signal )来主观判断亮度时间响应曲线是否已经到 过驱动的效果, 通常以第 Ώ+1 幀 (Frame ) 的亮度曲线调节水平为宜, 如 图 3 所示, 这种依靠工程师肉眼观察判断, 并经过多次尝试得出过驱动表 格的方法需要耗费大量的时间与人力, 效率低。
' 本发明的目的在于提供一种计算过驱动目标值的方法, 可以自动计算 过驱动表格中的过驱动目标值, 节省人力, 提高效率的同时又可以较好地 符合过驱动技术的原理, 并且过驱动效果良好。
为实现上述目的, 本发明提供一种计算过驱动目标值的方法, 包括以 下步骤:
步骤 1、 根据待填写过驱动表中一个表格的起始灰阶与终止灰阶, 进 行四帧动态切换, 所述四帧包括第一至第四帧;
步骤 2、 尝试一过驱动目标值, 以获.得该过驱动目标值的 R/G/B亮度- 时间响应曲线;
步骤 3、 对步骤 2中得到的 R/G/B亮度-时间响应曲线进行降噪平滑处 理;
步骤 4、 以步骤 1 中第三帧的亮度值作为目标亮度, 判断所述过驱动 目标值的 /G/B 亮度时间响应曲线中的亮度是否该目标亮度匹配, 若匹 配則转至步骤 5, 否则重复步骤 2至 4;
步骤 5、 若该次尝试的过驱动目标值的 R/G/B亮度-时间响应曲线中的 亮度是第一次个与目标亮度相匹配的亮度, 则将该过驱动目标值填入待填 写过驱动表中对应位置, 并重复步骤 2 至步骤 4; 若该次尝试的过驱动目 标值的 R/G/B 亮度-时间响应曲线中的亮度不是第一个与目标亮度相匹配 的亮度, 则比较该次尝试的过驱动目标值得出的 RZG/B 亮度时间响应曲 线的响应时间与该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B亮度时间响应曲线的响应时间, 转至步骤 6;
步骤 6、 当该次尝试的过驱动目标值得出的 R/GZB亮度-时间响应曲线 的响应时间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮度-时间响应曲线的响应时间小时, 则将该待填写过驱动表中对应 位置的过驱动目标值替换为该次尝试的过驱动目标值, 并重复步骤 2 至 5; 当该次尝试的过驱动目标值得出的 R/G/B 亮度-时间响应曲线的响应时 间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮 度―时间响应曲线的响应时间大时, 则以该待填写过驱动表中对应位置的过 驱动目标值作为该对应位置最终确定的过驱动目标值, 并转至步骤 7;
步骤 7、 重复步骤 1 至步骤 6, 直到完成过驱动表中的所有过驱动目 标值的计算。
所述待填写过驱动表为 17*17过驱动表, 每一次重复步骤〗 时所根据 的待填写过驱动表中表格的起始灰阶与终止灰阶至少有一个不同。
每一次重复步骤 2 所尝试的过驱动目标值不同。 根据重复顺序, 所述 步骤 2中过驱动目标值是 照从小到大的顺序尝试的。
根据重复顺序, 所述步骤 2 中过驱动目标值是按照从大到小的顺序尝 试的。
所述步骤 3 中采用中值滤波器对步骤 2 中得到的 R/G/B 亮度-时间响 应曲线进行降噪平滑处理。
当从低灰阶到高灰阶时, 所述步骤 4 中与所述目标亮度匹配的亮度的 最大值应小于目标亮度的 105%。
当从高灰阶到低灰阶时, 所述步骤 4 中与所述目标亮度匹配的亮度的 最小值应大于目标亮度的 95%。
所述步骤 5 通过比较 R/G/B 亮度-时间响应曲线的原始数 来确定过 驱动目标值。
所述第三顿的亮度值为 3000流明。
本发明还提供一种计算过驱动目标值的方法, 包括以下步骤: 步骤 1、 根据待填写过驱动表中一个表格的起始灰阶与终止灰阶, 进 行四帧动态切换, 所述四帧包括第一至第四桢;
步骤 2、 尝试一过驱动目标值, 以获得该过驱动目标值的 R/G/B亮度- 时间响应曲线;
步骤 3、 对步骤 2中得到的 R/GZB亮度时间响应曲线进行降噪平滑处 理;
步骤 4、 以步骤 中第三帧的亮度值作为目标亮度, 判断所述过驱动 目标值的 R/G/B 亮度-时间响应曲线中的亮度是否与该目标亮度匹配, 若
匹配则转至步骤 5, 否则重复步骤 2至 4;
步骤 5、 若该次尝试的过驱动目标值的 R/G/B亮度-时间响应曲线中的 亮度是第一个与目标亮度相匹配的亮度, 则将该过驱动目标值填入待填写 过驱动表中对应位置, 并重复步骤 2 至步骤 4; 若该次尝试的过驱动目标 值的 R/G/B 亮度-时间响应曲线中的亮度不是第一个与目标亮度相匹配的 亮度, 则比较该次尝试的过驱动目标值得出的 R/G/B 亮度-时间响应曲线 的响应时间与该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/GZB亮度时间响应曲线的响应时间, 转至步骤 6;
步骤 6、 当该次尝试的过驱动目标值得出的 R/G/B亮度时间响应曲线 的响应时间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮度-时间响应曲线的响应时间小时, 则将该待填写过驱动表中对应 位置的过驱动目标值替换为该次尝试的过驱动目标值, 并重复步骤 2 至 5; 当该次尝试的过驱动目标值得出的 R/G/B 亮度-时间响应曲线的响应时 间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮 度 -时间响应曲线的响应时间大时, 则以该待填写过驱动表中对应位置的过 驱动目标值作为该对应位置最终确定的过驱动目标值, 并转至步骤 7;
步骤 7、 重复步骤 I 至步骤 6, 直到完成过驱动表中的所有过驱动目 标值的计算;
其中, 所述待填写过驱动表为 17*17过驱动表, 每一次重复步骤 1 时 所根据的待填写过驱动表中表格的起始灰阶与终止灰阶至少有一个不同; 其中, 每一次重复步骤 2所尝试的过驱动目标值不同;
其中, 根据重复顺序, 所述步骤 2 中过驱动目标值是按照从小到大的 顺序尝试的;
其中, 所述步骤 3 中采用中值滤波器对步骤 2 中得到的 R/G/B亮度- 时间响应曲线进行降噪平滑处理。
当从低灰阶到高灰阶时, 所述步骤 4 中与所述目标亮度匹配的亮度的 最大值应小于目标亮度的 105%。
当从高灰阶到低灰阶时, 步骤 4 中与所述目标亮度匹配的亮度的最小 值应大于目标亮度的 95%。
所述步骤 5 通过比较 R/G/B 亮度-时间响应曲线的原始数据来确定过 驱动目标值。
所述第三顿的亮度值为 3000流明。
本发明的有益效杲: 本发明的计算过驱动目标值的方法, 通过按照一 定顺序尝试过驱动目标值来确定符合目标亮度的过驱动目标值的 R/G/B亮
度-时间响应曲线, 比较符合目标亮度的 R/G/B 亮度-时间响应曲线的响应 时间, 并从中确定过驱动目标值, 进而可以自动计算过驱动表格中的过驱 动目标值, 节省人力, 提高效率的同时又可以较好地符合过驱动技术的原 理, 并且过驱动效杲良好。
为了能更进一步了解本发明的特征以及技术内容, 请参阅以下有关本 发明的详细说明与 †图, 然而附图仅提供参考与说明用, 并非用来对本发 明加以限制。 附图说明
下面结合附图, 通过对本发明的具体实施方式详细描述, 将使本发明 的技术方案及其它有益效果显而易见。
附图中,
图 1为现有技术中没有过驱动作用时, 从灰阶 32到灰阶 128的亮度- 图 2为现有技术中有过驱动作用时, 从灰阶 32到 128的亮度-时闾响 应曲线;
图 3为现有技术中液晶显示器的光学响应时序图;
图 4为本发明计算过驱动目标值的方法的流程图;
图 5为本发明中红光的亮度-时间响应曲线降噪平滑处理前后的效果比 对图。 具体实施方式 的优选实 i例及其附图 行详 描述。' ¾ r " 、、 ' 请参阅图 4 , 本发明提供一种计算过驱动目标值的方法, 包括以下步 骤:
步骤 1、 根据待填写过驱动表中一个表格的起始灰阶与终止灰阶, 进 行四帧动态切换, 所述四帧包括第一至第四桢。
在本实施例中, 所述待填写过驱动表为 17*17 过驱动表, 然不限于 此。
重复该步骤时, 每次重复所选择的表格均不相同, 即每次重复所根据 的待填写过驱动表中表格的起始灰阶与终止灰阶至少有一个不同。
所述第一帧为实现起始灰阶的驱动信号, 第二桢为实现灰阶介于起始 灰阶和终止灰阶之间的驱动信号, 第三帧和第四帧为实现终止灰阶的驱动
步骤 2、 尝试一过驱动目标值, 以获得该过驱动目标值的 R/G/B亮度- 时间响应曲线。
重复该步骤时, 每次重复所尝试的过驱动目标值均不相同, 按重复的 先后顺序, 所述过驱动目标值是按照从小到大或者从大到小的顺序尝试 的, 具体可以根据实际需要选择。
步骤 3 , 对步骤 2中得到的 R/G/B亮度时间响应曲线进行降噪平滑处 理。
在该步骤中, 采用中值滤波器对步骤 2 中得到的 R/G/B 亮度-时间响 应曲线进行降噪平滑处理。 请参阅图 5 , 图中所示的为红光的亮度-时间响 应曲线降噪平滑处理前后的效果比对图, 经过中值滤波器处理后可以使得 存在噪音的原始测量曲线平滑化, 以提高后续计算速度及计算的准确性。
步骤 4、 以步骤 1 中第三帧的亮度值作为目标亮度, 判断所述过驱动 目标值的 R/GZB 亮度-时间响应曲线中的亮度是否与该目标亮度匹配, 若 匹配则转至步骤 5, 否则重复步骤 2至 4。
在该步骤中, 所述第三帧的亮度值约为 3000流明 (LM ) , 匹配所述 过驱动目标值的 R/G/B 亮度-时间响应曲线中的亮度与所述目标亮度的规 则为:
当从低灰阶到高灰阶时, 该步驟 4 中与所述目标亮度匹配的亮度的最 大值应小于目标亮度的 105%, 满足该要求可以很好地实现低灰阶到高灰 阶的较好过驱动效杲。
当从高灰阶到低灰阶时, 该步骤 4 中与所述目标亮度匹配的亮度的最 小值应大于目标亮度的 95%, 满足该要求可以很好地实现高灰阶到低灰阶 的较好过驱动效果。
步骤 5、 若该次尝试的过驱动目标值的 R/G/B亮度时间响应曲线中的 亮度是第一个与目标亮度相匹配的亮度, 则将该过驱动目标值填入待填写 过驱动表中对应位置, 并重复步骤 2 至步骤 4; 若该次尝试的过驱动目标 值的 R/G/B 亮度-时间响应曲线中的亮度不是第一个与目标亮度相匹配的 亮度, 则比较该次尝试的过驱动目标值得出的 R/GZB 亮度-时间响应曲线 的响应时间与该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B亮度-时间响应曲线的响应时间, 转至步骤. 6。
步骤 6、 当该次尝试的过驱动目标值得出的 R/G/B亮度-时间响应曲线 的响应时间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮度-时间响应曲线的响应时间小时, 則将该待填写过驱动表中对应
位置的过驱动目标值替换为该次尝试的过驱动目标值, 并重复步骤 2 至 5; 当该次尝试的过驱动目标值得出的 R/G/B 亮度-时间响应曲线的响应时 间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮 度-时间响应曲线的响应时间大时, 则以该待填写过驱动表中对应位置的过 驱动目标值作为该对应位置最终确定的过驱动目标值, 并转至步骤 7。
可以通过比较起始灰阶为 32 , 目标灰阶包含 0-255 灰阶的 R/G/B 亮 度—时间响应曲线的原始数据来确定过驱动目标值。
步骤 7、 重复步骤 i 至步骤 6, 直到完成过驱动表中的所有过驱动目 标值的计算。
重复步骤 〗 至 6, 就可以自动判断填写完整个待填写过驱动表, 节省 人力, 提高效率, 并且过驱动效果好。
综上所述, 本发明提供一种计算过驱动目标值的方法, 通过按照一定 顺序尝试过驱动目标值来确定符合目标亮度的过驱动目标值的 R/G/B 亮 度-时间响应曲线, 比较符合目标亮度的 R/G/B 亮度-时间响应曲线的响应 时闾, 并从中确定过驱动目标值, 进而可以自动计算过驱动表格中的过驱 动目标值, 节省人力, 提高效率的同时又可以较好地符合过驱动技术的原 理, 并且过驱动效果良好。
以上所述, 对于本领域的普通技术人员来说, 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形, 而所有这些改变和变形 都应属于本发明权利要求的保护范围。
Claims
权 利 要 求 】、 一种计算过驱动目标值的方法, 包括以下步骤:
步骤 1、 根据待填写过驱动表中一个表格的起始灰阶与终止灰阶, 进 行'四帧动态切换, 所述四帧包括第一至第四桢;
步骤 2、 尝试一过驱动目标值, 以获得该过驱动目标值的 R/G/B亮度- 时间响应曲线;
步骤 3、 对步骤 2中得到的 R/GZB亮度时间响应曲线进行降噪平滑处 理;
步骤 4、 以步骤 中第三帧的亮度值作为目标亮度, 判断所述过驱动 目标值的 R/G/B 亮度-时间响应曲线中的亮度是否与该目标亮度匹配, 若 匹配则转至步骤 5, 否则重复步骤 2至 4;
步骤 5、 若该次尝试的过驱动目标值的 R/G/B亮度-时间响应曲线中的 亮度是第一个与目标亮度相匹配的亮度, 则将该过驱动目标值填入待填写 过驱动表中对应位置, 并重复步骤 2 至步骤 4; 若该次尝试的过驱动目标 值的 R/G/B 亮度-时间响应曲线中的亮度不是第一个与目标亮度相匹配的 亮度, 则比较该次尝试的过驱动目标值得出的 R/G/B 亮度-时间响应曲线 的响应时间与该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B亮度时间响应曲线的响应时间, 转至步骤 6;
步骤 6、 当该次尝试的过驱动目标值得出的 R/G/B亮度时间响应曲线 的响应时间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮度-时间响应曲线的响应时间小时, 則将该待填写过驱动表中对应 位置的过驱动目标值替换为该次尝试的过驱动目标值, 并重复步骤 2 至 5 ; 当该次尝试的过驱动目标值得出的 /GZB 亮度-时闾响应曲线的响应时 间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮 度时间响应曲线的响应时间大时, 则以该待填写过驱动表中对应位置的过 驱动目标值作为该对应位置最终确定的过驱动目标值, 并转至步骤 7;
步骤 7、 重复步骤 I 至步骤 6 , 直到完成过驱动表中的所有过驱动目 标值的计算。
2、 如权利要求 1 中所述的计算过驱动目标值的方法, 其中, 所述待 填写过驱动表为 17*17过驱动表, 每一次重复步骤 1 时所根据的待填写过 驱动表中表格的起始灰阶与终止灰阶至少有一个不同。
3、 如权利要求 1 中所述的计算过驱动目标值的方法, 其中, 每一次
重复步骤 2所尝试的过驱动目标值不同。
4、 如权利要求 3 中所述的计算过驱动目标值的方法, 其中, 根据重 复顺序, 所述步骤 2中过驱动目标值是按照从小到大的顺序尝试的。
5、 如权利要求 3 中所述的计算过驱动目标值的方法, 其中, 根据重 复顺序, 所述步骤 2中过驱动目标值是按照从大到小的顺序尝试的。
6、 如权利要求 1 中所述的计算过驱动目标值的方法, 其中, 所述步 骤 3 中采用中值滤波器对步骤 2 中得到的 R/G/B亮度-时间响应曲线进行 降噪平滑处理。
7、 如权利要求 1 中所述的计算过驱动目标值的方法, 其中, 当从低 灰阶到高灰阶时, 所述步骤 4 中与所述目标亮度匹配的亮度的最大值应小 于目标亮度的 105%。
8、 如权利要求 1 中所述的计算过驱动目标值的方法, 其中, 当从高 灰阶到低灰阶时, 步骤 4 中与所述目标亮度匹配的亮度的最小值应大于目 标亮度的 95%。
9、 如权利要求 1 中所述的计算过驱动目标值的方法, 其中, 所述步 骤 5 通过比较 R/G/B 亮度-时间响应曲线的原始数据来确定过驱动目标 值。
10、 如权利要求 1 中所述的计算过驱动目标值的方法, 其中, 所述第 三顿的亮度值为 3000流明。
11、 一种计算过驱动目标值的方法, 包括以下步骤:
步骤 1、 根据待填写过驱动表中一个表格的起始灰阶与终止灰阶, 进 行四帧动态切换, 所述四帧包括第一至第四帧;
步骤 2、 尝试一过驱动目标值, 以获得该过驱动目标值的 R/G/B亮度- 步骤 3、 对步驟 2中得到的 R/G/B亮度-时间响应曲线进行降噪平滑处 理;
步骤 4、 以步骤 1 中第三帧的亮度值作为目标亮度, 判断所述过驱动 目标值的 R/G/B 亮度-时间响应曲线中的亮度是否与该目标亮度匹配, 若 匹配则转至步骤 5 , 否则重复步骤 2至 4;
步骤 5、 若该次尝试的过驱动目标值的 R/G/B亮度-时间响应曲线中的 亮度是第一个与目标亮度相匹配的亮度, 则将该过驱动目标值填入待填写 过驱动表中对应位置, 并重复步骤 2 至步骤 4; 若该次尝试的过驱动目标 值的 R/G/B 亮度时间响应曲线中的亮度不是第一个与目标亮度相匹配的 亮度, 则比较该次尝试的过驱动目标值得出的 R/GZB 亮度-时间响应曲线
的响应时间与该待填写过驱动表中对应位置的过驱动目标值尝试得出的
R/G/B亮度-时间响应曲线的响应时间, 转至步骤 6;
步骤 6、 当该次尝试的过驱动目标值得出的 R/G/B亮度-时间响应曲线 的响应时间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮度 -时间响应曲线的响应时间小时, 则将该待填写过驱动表中对应 位置的过驱动目标值替换为该次尝试的过驱动目标值, 并重复步骤 2 至 5; 当该次尝试的过驱动目标值得出的 R/G/B 亮度-时间响应曲线的响应时 间比该待填写过驱动表中对应位置的过驱动目标值尝试得出的 R/G/B 亮 度-时间响应曲线的响应时间大时, 则以该待填写过驱动表中对应位置的过 驱动目标值作为该对应位置最终确定的过驱动目标值, 并转至步骤 7;
步骤 7、 重复步骤 1 至步骤 6, 直到完成过驱动表中的所有过驱动目 标值的计算;
其中, 所述肩 ^填写过驱动表为 17*17过驱动表, 每一次重复步骤 i 时 所根据的待填写过驱动表中表格的起始灰阶与终止灰阶至少有一个不同; 其中, 每一次重复步骤 2所尝试的过驱动目标值不同;
其中, 根据重复顺序, 所述步骤 2 中过驱动目标值是按照从小到大的 顺序尝试的;
其中, 所述步骤 3 中采用中值滤波器对步骤 2 中得到的 R/GZB亮度- 时间响应曲线进行降噪平滑处理。
12、 如权利要求 1 1 中所述的计算过驱动目标值的方法, 其中, 当从 低灰阶到高灰阶时, 所述步骤 4 中与所述目标亮度匹配的亮度的最大值应 小于目标亮度的 105%。
13、 如权利要求 11 中所述的计算过驱动目标值的方法, 其中, 当从 高灰阶到低灰阶时, 步骤 4 中与所述目标亮度匹配的亮度的最小值应大于 目标亮度的 95%。
14、 如权利要求 11 中所述的计算过驱动目标值的方法, 其中, 所述 步骤 5 通过比较 R/G/B 亮度-时间响应曲线的原始数据来确定过驱动目标 值。
15、 如权利要求 1 1 中所述的计算过驱动目标值的方法, 其中, 所述 第三帧的亮度值为 3000流明。
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| CN104517579B (zh) * | 2014-12-31 | 2017-04-19 | 深圳市华星光电技术有限公司 | 过驱动表的调试方法 |
| CN104900209A (zh) | 2015-06-29 | 2015-09-09 | 深圳市华星光电技术有限公司 | 基于子像素信号亮暗切换时过驱动目标值的计算方法 |
| CN106448584B (zh) * | 2016-08-31 | 2018-12-18 | 深圳市华星光电技术有限公司 | 一种四色面板的过驱动方法 |
| CN108039155B (zh) * | 2017-12-28 | 2020-01-31 | 深圳市华星光电技术有限公司 | 获取液晶显示器的过驱动查找表的方法 |
| CN108986762B (zh) * | 2018-09-11 | 2021-09-14 | 惠科股份有限公司 | 显示装置及其电压调节方法 |
| CN114267303B (zh) * | 2021-12-31 | 2022-08-09 | 北京显芯科技有限公司 | 一种调节亮度的方法、装置和设备 |
| CN119252202B (zh) * | 2024-12-06 | 2025-03-04 | 晶晨半导体(深圳)有限公司 | 获得帧过驱查找表的系统及方法、校准方法、设备和介质 |
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