CN102682681B - Liquid crystal display response time measuring method and device - Google Patents
Liquid crystal display response time measuring method and device Download PDFInfo
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- CN102682681B CN102682681B CN201110066042.1A CN201110066042A CN102682681B CN 102682681 B CN102682681 B CN 102682681B CN 201110066042 A CN201110066042 A CN 201110066042A CN 102682681 B CN102682681 B CN 102682681B
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Abstract
The embodiment of the invention discloses a liquid crystal display response time measuring method and a liquid crystal display response time measuring device. The method comprises the following steps that three dimensional (3D) images of a preset graphic card are displayed on a liquid crystal display, wherein one side of the preset graphic card is a stripped black region, the rest places are white regions, and the area of the black region does not exceed one half of the area of the preset graphic card; the brightness of the liquid crystal display used for displaying the 3D images of the preset graphic card is detected, and the brightness change curve of the liquid crystal display used for displaying the 3D images of the preset graphic card along with the time is output; and the response time of the liquid crystal display is determined according to the change curve. The method and device are applicable to the measurement on the response time of the liquid crystal display.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly a kind of liquid crystal display response time measuring method and device.
Background technology
Liquid crystal display is as the display device of image, and its parameters can not be ignored, and the response time distinctive performance index that are liquid crystal display.The so-called response time, refer to that each pixel of liquid crystal display is to the reaction velocity of input signal, namely pixel is bright or by bright turn of dark required time, the response time is shorter, and user does not more have the sensation that tail shadow pulls when seeing dynamic menu by blackout.Generally will be divided into two parts the response time: rise time (Rise time) and fall time (Fall time), the usually said response time refer to the rise time and fall time sum.
Along with the progress of infotech, 3D display technique obtains application in field of television, and by the 3D liquid crystal display of 3D televisor, user can watch 3D picture.At present, the maximum 3D liquid crystal display on market is 120Hz, and the liquid crystal display of these 120Hz can receive the image of 120Hz, also can receive the image of 100Hz.For the image of 100Hz, require that the response time of 3D liquid crystal display should be less than or equal to 10ms, and the response time of the liquid crystal display of 120Hz not necessarily meets this requirement, if do not meet this requirement, 3D liquid crystal display will there will be motion blur phenomenon, have a strong impact on 3D effect.Therefore, before selection liquid crystal display, the response time of actual measurement liquid crystal display is very important.
At present, the response time of measuring liquid crystal display utilizes special testing software, by observing specific test pictures, compared the speed of response time by the length of smear; Or, the response time of liquid crystal display is measured by special liquid crystal response measuring instrument.
Realizing in process of the present invention, inventor finds that in prior art, at least there are the following problems:
When carrying out the measurement of liquid crystal display response time, need by special testing software or special liquid crystal response measuring instrument, measuring method is easy not, and cost is higher.
Summary of the invention
Embodiments of the invention provide a kind of liquid crystal display response time measuring method and device, can measure in mode that is easy, low cost to the liquid crystal display response time.
The technical scheme that the embodiment of the present invention adopts is:
A kind of liquid crystal display response time measuring method, comprising:
At the 3D rendering of the preset graph card of liquid crystal screen display, wherein, the side of described preset graph card is strip black region, and all the other places are white portion, and the area of described black region is no more than the half of described preset graph card area;
The lightness of the liquid crystal display of the 3D rendering of the described preset graph card of display is detected, the lightness of the liquid crystal display of the 3D rendering of preset graph card curve over time described in output display;
The response time of described liquid crystal display is determined according to described change curve.
A kind of liquid crystal display response time measurement mechanism, comprising:
Preset graph card, image detecting element and output unit, the 3D rendering of preset graph card described in described liquid crystal screen display, wherein,
The side of described preset graph card is strip black region, and all the other places are white portion, and the area of described black region is no more than the half of described preset graph card area;
Described image detecting element, the lightness for the liquid crystal display of the 3D rendering to the described preset graph card of display detects;
Described output unit, for the lightness curve over time of the liquid crystal display of the 3D rendering of graph card preset described in output display, to determine the response time of described liquid crystal display according to described change curve.
The liquid crystal display response time measuring method that the embodiment of the present invention provides and device, at the 3D rendering of the preset graph card of liquid crystal screen display, the side of described preset graph card is strip black region, all the other places are white portion, the area of described black region is no more than the half of described preset graph card area, the lightness of the liquid crystal display of the 3D rendering of the described preset graph card of display is detected, described in output display, the lightness of the liquid crystal display of the 3D rendering of preset graph card curve over time, determines the response time of described liquid crystal display according to described change curve.Compared with prior art, the embodiment of the present invention can realize the measurement to the liquid crystal display response time by preset graph card, and metering system is easy and cost is lower.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The method flow diagram that Fig. 1 provides for the embodiment of the present invention one;
The schematic shapes of the preset graph card that Fig. 2 provides for the embodiment of the present invention one;
The schematic diagram of the preset graph card that left eye is seen under the 3D state that Fig. 3 provides for the embodiment of the present invention one;
The schematic diagram of the preset graph card that right eye is seen under the 3D state that Fig. 4 provides for the embodiment of the present invention one;
The schematic diagram of the preset graph card of final display under the 3D state that Fig. 5 provides for the embodiment of the present invention one;
The lightness curve over time of the 3D rendering of the preset graph card that Fig. 6 provides for the embodiment of the present invention one.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
For making the advantage of technical solution of the present invention clearly, below in conjunction with drawings and Examples, the present invention is elaborated.
According to the definition of ISO, the liquid crystal display response time only considered the time that used time the shortest pixel Hei-Bai-Hei extremely switches, and does not have too many guiding value when occurring that maximum GTGs switches when weighing actual use.The pixel whole response time only accounted for whole pixel rise and decline process 80% time, so-called white refers to 10% gray scale, and black refers to 90% gray scale, all the other times of 20% have been left in the basket.Because for liquid crystal molecule, power up and to start and finally to stablize these two stages be time-consuming, the process that the gray scale at two 20% transforms likely exceedes the response time that ISO defines, and therefore this definition of saving 20% of ISO just can beautify index greatly.When the simultaneously definition of ISO have ignored color change, namely time of switching of different gray scale.From the displaying principle of liquid crystal, when pixel from comparatively light gray degree be converted into comparatively dark gray time, be added in the voltage also corresponding reinforcement of pixel two end electrodes.But the maximum excitation voltage switched with the Hei-Bai-Hei defined in ISO specification is compared, and applies voltage accordingly much lower when gray scale switches, the speed of therefore liquid crystal molecule reversion response in this case also can be slack-off.In like manner, when color range to be converted into from more dark-grey rank comparatively light gray rank time, process is contrary, but the electrode voltage that now light GTG is corresponding is also non-vanishing, and corresponding voltage difference arousal effect also can be deteriorated, and the negative edge time also can be elongated.
The liquid crystal display of 120Hz can receive the image of 120Hz, and its response time is shorter than the response time of 100Hz liquid crystal display in theory.But, the response time that some liquid crystal display marks not is the time used of the Hei-Bai-Hei on practical significance, and be rise time or fall time, may be also " GTG ", cause the response time of these so-called 120Hz liquid crystal displays not have response time of 100Hz liquid crystal display short.Therefore, the instructions just with reference to liquid crystal display determines that its response time is insecure, only has and could determine whether these liquid crystal displays meet the requirement of the 3D liquid crystal display of 100Hz exactly by actual measurement.
Embodiment one
The present embodiment provides a kind of liquid crystal display response time measuring method, and as shown in Figure 1, described method comprises:
101, at the 3D rendering of the preset graph card of liquid crystal screen display, wherein, as shown in Figure 2, the side of described preset graph card is strip black region, and all the other places are white portion, and the area of described black region is no more than the half of described preset graph card area.
Particularly, for the 3D state of 100Hz, described preset graph card is divided into left and right two width images, and as shown in Figure 3, left eye is it is seen that the left side is with the image of black region; As shown in Figure 4, right eye is it is seen that the plain white image on the right; The image shown under the 3D state that frequency is 100Hz is the display that left images replaces, p.s., left images occurred 50 times respectively, as shown in Figure 5, the 3D rendering of the described preset graph card finally obtained comprises the gray area (with trellis box indicating in figure) that described black region and described white portion are formed with same frequency Overlapping display.
102, the lightness of photoelectric probe to the liquid crystal display of the 3D rendering of the described preset graph card of display is adopted to detect.
Particularly, the lightness of photoelectric probe to the liquid crystal display of the described gray area of display is adopted to detect.
103, by the lightness curve over time of the liquid crystal display of the 3D rendering of preset graph card described in oscillograph output display.
Particularly, by the lightness curve over time of the liquid crystal display of gray area described in oscillograph output display.
104, the rising time of described change curve in one-period and negative edge time is determined.
Wherein, described rising time is described curve is risen to peak in one-period 90% time used by minimum point;
The described negative edge time is described curve is dropped to peak in one-period 10% time used by peak.
105, described rising time and negative edge time are added, obtain the response time of described liquid crystal display.
As shown in Figure 6, the lightness curve over time of the 3D rendering of the 100Hz of the preset graph card shown by the liquid crystal display of 120Hz, wherein, upper and lower two dotted lines represent maximum brightness and minimum brightness respectively.The rising time obtained for intercept point with 90% of peak brightness is about 4.16ms, and the negative edge obtained for intercept point with 10% of peak brightness is about 7ms, then the response time of described liquid crystal display is 4.16ms+7ms=11.16ms.
It can thus be appreciated that described liquid crystal display can reach minimum brightness and maximum brightness in 10ms, under certain backlight control, can realize 3D Presentation Function by image compensation, the workload of image compensation is little.
Adopt the above method, because preset graph card is made by oneself, just by means of photoelectric probe and oscillograph, can measure the response time of liquid crystal display, to select the liquid crystal display being applicable to the 3D TV being 100Hz, metering system is simple and cost is lower.
The liquid crystal display response time measuring method that the embodiment of the present invention provides, at the 3D rendering of the preset graph card of liquid crystal screen display, the side of described preset graph card is strip black region, all the other places are white portion, the area of described black region is no more than the half of described preset graph card area, the lightness of the liquid crystal display of the 3D rendering of the described preset graph card of display is detected, described in output display, the lightness of the liquid crystal display of the 3D rendering of preset graph card curve over time, determines the response time of described liquid crystal display according to described change curve.Compared with prior art, the embodiment of the present invention can realize the measurement to the liquid crystal display response time by preset graph card, photoelectric probe and oscillograph, and metering system is easy and cost is lower.
Embodiment two
The present embodiment provides a kind of liquid crystal display response time measurement mechanism, and described device comprises preset graph card, image detecting element and output unit, the 3D rendering of preset graph card described in described liquid crystal screen display, wherein,
The side of described preset graph card is strip black region, and all the other places are white portion, and the area of described black region is no more than the half of described preset graph card area;
Described image detecting element, the lightness for the liquid crystal display of the 3D rendering to the described preset graph card of display detects;
Described output unit, for the lightness curve over time of the liquid crystal display of the 3D rendering of graph card preset described in output display, to determine the response time of described liquid crystal display according to described change curve.
Wherein, the 3D rendering of described preset graph card comprises the gray area that described black region and described white portion are formed with same frequency Overlapping display.
Further, described image detecting element is specially photoelectric probe, and the lightness for the liquid crystal display to the described gray area of display detects;
Described output unit is specially oscillograph, for the lightness curve over time of the liquid crystal display of gray area described in output display.
Wherein, the response time of described liquid crystal display is the rising time of described change curve in one-period and negative edge time sum.
Further, described rising time is described curve is risen to peak in one-period 90% time used by minimum point;
The described negative edge time is described curve is dropped to peak in one-period 10% time used by peak.
The liquid crystal display response time measurement mechanism that the embodiment of the present invention provides, at the 3D rendering of the preset graph card of liquid crystal screen display, the side of described preset graph card is strip black region, all the other places are white portion, the area of described black region is no more than the half of described preset graph card area, the lightness of the liquid crystal display of the 3D rendering of the described preset graph card of display is detected, described in output display, the lightness of the liquid crystal display of the 3D rendering of preset graph card curve over time, determines the response time of described liquid crystal display according to described change curve.Compared with prior art, the embodiment of the present invention can realize the measurement to the liquid crystal display response time by preset graph card, photoelectric probe and oscillograph, and metering system is easy and cost is lower.
The liquid crystal display response time measurement mechanism that the embodiment of the present invention provides can realize the above-mentioned embodiment of the method provided, and concrete function realizes the explanation referred in embodiment of the method, does not repeat them here.The liquid crystal display response time measuring method that the embodiment of the present invention provides and device go for measuring the response time of liquid crystal display, but are not limited only to this.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. a liquid crystal display response time measuring method, is characterized in that, comprising:
At the 3D rendering of the preset graph card of liquid crystal screen display, wherein, the side of described preset graph card is strip black region, all the other places are white portion, the area of described black region is no more than the half of described preset graph card area, and the 3D rendering of described preset graph card comprises the gray area that described black region and described white portion are formed with same frequency Overlapping display;
The lightness of the liquid crystal display of the 3D rendering of the described preset graph card of display is detected, the lightness of the liquid crystal display of the 3D rendering of preset graph card curve over time described in output display;
The response time of described liquid crystal display is determined according to described change curve.
2. method according to claim 1, is characterized in that, the lightness of the liquid crystal display of the described 3D rendering to the described preset graph card of display detects, and the lightness of the liquid crystal display of the 3D rendering of preset graph card described in output display over time curve comprises:
The lightness of photoelectric probe to the liquid crystal display of the described gray area of display is adopted to detect;
By the lightness curve over time of the liquid crystal display of gray area described in oscillograph output display.
3. method according to claim 2, is characterized in that, describedly determines that the response time of described liquid crystal display comprises according to described change curve:
Determine the rising time of described change curve in one-period and negative edge time;
The response time of described liquid crystal display is described rising time and negative edge time sum.
4. method according to claim 3, is characterized in that: described rising time is described curve is risen to peak in one-period 90% time used by minimum point;
The described negative edge time is described curve is dropped to peak in one-period 10% time used by peak.
5. a liquid crystal display response time measurement mechanism, is characterized in that, comprises preset graph card, image detecting element and output unit, the 3D rendering of preset graph card described in described liquid crystal screen display, wherein,
The side of described preset graph card is strip black region, all the other places are white portion, the area of described black region is no more than the half of described preset graph card area, and the 3D rendering of described preset graph card comprises the gray area that described black region and described white portion are formed with same frequency Overlapping display;
Described image detecting element, the lightness for the liquid crystal display of the 3D rendering to the described preset graph card of display detects;
Described output unit, for the lightness curve over time of the liquid crystal display of the 3D rendering of graph card preset described in output display, to determine the response time of described liquid crystal display according to described change curve.
6. device according to claim 5, is characterized in that, described image detecting element is specially photoelectric probe, and the lightness for the liquid crystal display to the described gray area of display detects;
Described output unit is specially oscillograph, for the lightness curve over time of the liquid crystal display of gray area described in output display.
7. device according to claim 6, is characterized in that, response time of described liquid crystal display is the rising time of described change curve in one-period and negative edge time sum.
8. device according to claim 7, is characterized in that, described rising time is described curve is risen to peak in one-period 90% time used by minimum point;
The described negative edge time is described curve is dropped to peak in one-period 10% time used by peak.
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| CN103197444B (en) * | 2013-03-22 | 2015-09-30 | 深圳市华星光电技术有限公司 | The measuring method of a kind of liquid crystal display response time and system |
| CN103257468B (en) * | 2013-05-16 | 2016-04-13 | 中山大学 | A kind of liquid crystal display response time measuring method based on reference brightness |
| CN104122075B (en) * | 2014-07-24 | 2017-07-25 | 中山大学 | A Method of Directly Measuring Display Motion Blur Based on Motion Square Width |
| CN111402769B (en) * | 2020-04-14 | 2023-05-02 | 深圳市华星光电半导体显示技术有限公司 | Method for judging response speed of display panel |
| CN113376880B (en) * | 2021-07-27 | 2022-10-14 | 深圳创维－Rgb电子有限公司 | Display module backlight response test method and device and readable storage medium |
| CN117058997B (en) * | 2023-09-08 | 2024-07-02 | 北京显芯科技有限公司 | Method for measuring response time of moving image and electronic equipment |
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| CN1698089A (en) * | 2001-08-28 | 2005-11-16 | 株式会社互联 | TFT display apparatus controller |
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