CN104820300A - Method for detecting ghosting effect of liquid crystal display - Google Patents
Method for detecting ghosting effect of liquid crystal display Download PDFInfo
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- CN104820300A CN104820300A CN201510141156.6A CN201510141156A CN104820300A CN 104820300 A CN104820300 A CN 104820300A CN 201510141156 A CN201510141156 A CN 201510141156A CN 104820300 A CN104820300 A CN 104820300A
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- liquid crystal
- crystal display
- time
- detection method
- densimetric fraction
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- 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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to a method for detecting the ghosting effect of a liquid crystal display, and the method comprises the following steps: providing human vision persistence time; providing the maximum color change speed of the liquid crystal display; calculating the product of the human vision persistence time and the maximum color change speed, so as to obtain a threshold value; calculating density level variation of a pixel element of the liquid crystal display; comparing the threshold value with the density level variation, and enabling the threshold value to be greater than the density level variation, so as to detect and eliminate the ghosting effect.
Description
Technical field
The present invention relates to a kind of method of the ghost image in order to detection LCD monitor, particularly relate to Thin Film Transistor-LCD.
Background technology
Liquid crystal display (LCD) oneself be widely used in the display device of desktop computer screen, notebook computer screen, TV and other kinds, along with the development of its manufacturing technology, the range of application of liquid crystal display and the quality of made product also will Sustainable Growth and development in future.
But, with traditional cathode-ray tube (CRT) (CRT) display or nearest plasma (Plasma) display by comparison, liquid crystal display maximum shortcoming in use is to have the slower reaction time (responsetime), and this shortcoming is caused by the structural detail of liquid crystal display.All pixels of liquid crystal display produced by colored filter (color filter), each pixel comprises respectively in order to produce redness, green and blue three sub-pixels, and the reaction time of each pixel then depends on the unlatching (turn on) carrying out the transistor controlled and the speed of again closing (turn off).Wherein, the excessively slow transistor reaction time can affect effect when using liquid crystal display performance electronic game (video games) or film (movies); That is, because the speed of mobile object is too fast in video game or film, the transistor reaction time of some pixel is caused not catch up with, the track (trailing effect) that mobile and scintillation effect produces can be seen during the mobile object making user watch in electronic game or film at the edge of this mobile object, generally this track is called ghost image (ghosting effect).Therefore, in the manufacturing technology of liquid crystal display, the Findings for realizing the liquid crystal display of high image quality must solve the problem of ghost image.
Summary of the invention
In order to solve the problem, the present invention uses digitized video treatment technology to detect and to eliminate the ghost image of liquid crystal display.The algorithm that this case provides is very simple, enforcements also is not had a complexity, by using the technology of this case can by a low price general and have the liquid crystal display lifting in the reaction time of length relatively and become the display quality with very excellence.
Fundamental purpose of the present invention is to provide a kind of detection method method of ghost image of liquid crystal display, and it can directly apply to the image input data end of liquid crystal display, can also be integrated in the control integration circuit (1C) of liquid crystal display.
According to conception of the present invention, provide a kind of detection and removing method of ghost image of liquid crystal display, comprise the following steps: to provide human vision to persist the time; The maximum color of this liquid crystal display is provided to change speed; Calculate this human vision persist time and this maximum color change speed product and threshold value; Calculate the densimetric fraction knots modification of the pixel elements of this liquid crystal display; And compare this threshold value and this densimetric fraction knots modification, make this threshold value be greater than this densimetric fraction knots modification, to detect and to eliminate ghost image.
Accompanying drawing explanation
Fig. 1, the present invention carry the schematic diagram of the detection method of ghost image.
Transverse axis is the time, and the longitudinal axis is the densimetric fraction (intensity level) of pixel elements (pixel component).
Embodiment
In order to improve ghost image, method provided by the present invention must detect effectively and identification can cause pixel in the image input data of ghost image.But ghost image is a kind of visual phenomenon and has different changes for different observers; When the image of movement is fast presented in liquid crystal display, the effect of two kinds of different kenels can be observed: track effect (trail effect) and scintillation effect (blinking effect).These two kinds of effects are all because transistor slower reaction time causes, and two recommend and all can be considered ghost image.The present invention is directed to these two kinds of effects and the reason causing these two kinds of effects theory is behind provided, can find out for guiding the method that detection and identification can cause the pixel of ghost image with this theory.
Claims (5)
1. a detection method for the ghost image of liquid crystal display, comprises the following steps:
A () provides human vision to persist the time;
B () provides the maximum color of this liquid crystal display to change speed;
(c) calculate this human vision persist time and this maximum color change speed product and threshold is moving to and fro;
D () calculates the densimetric fraction knots modification of the pixel elements of this liquid crystal display; And
E () compares this threshold value and this densimetric fraction knots modification, if this threshold value is less than this densimetric fraction knots modification, then this pixel elements has ghost image.
2. detection method as claimed in claim 1, wherein ghost image comprises track effect and scintillation effect.
3. the detection method as described in claim I, wherein this human vision persists the time and is greater than 0 and is less than 20 milliseconds.
4. detection method as claimed in claim 1, wherein step (b) also comprise the following steps: in-time is engraved in this liquid crystal display and provides the first frame, now this pixel elements has the first densimetric fraction;
Be engraved in second time in this liquid crystal display and provide the second frame, now this pixel elements has the second densimetric fraction; And the variable quantity calculating this first densimetric fraction and this second densimetric fraction is relative to the slope of the variable quantity in this first moment and this second moment, this slope is this maximum color and changes speed.
5. detection method as claimed in claim 1, is applied to this liquid crystal display in real time fashion, and the method can false code representative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510141156.6A CN104820300A (en) | 2015-03-30 | 2015-03-30 | Method for detecting ghosting effect of liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510141156.6A CN104820300A (en) | 2015-03-30 | 2015-03-30 | Method for detecting ghosting effect of liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104820300A true CN104820300A (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510141156.6A Pending CN104820300A (en) | 2015-03-30 | 2015-03-30 | Method for detecting ghosting effect of liquid crystal display |
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| Country | Link |
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| CN (1) | CN104820300A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809634A (en) * | 2017-11-07 | 2018-03-16 | 歌尔股份有限公司 | Smear management-control method and device |
| CN109752870A (en) * | 2019-01-31 | 2019-05-14 | 电子科技大学中山学院 | Electrophoresis electronic paper ghost detection system and detection method |
-
2015
- 2015-03-30 CN CN201510141156.6A patent/CN104820300A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809634A (en) * | 2017-11-07 | 2018-03-16 | 歌尔股份有限公司 | Smear management-control method and device |
| CN107809634B (en) * | 2017-11-07 | 2019-04-23 | 歌尔股份有限公司 | Smear management-control method and device |
| CN109752870A (en) * | 2019-01-31 | 2019-05-14 | 电子科技大学中山学院 | Electrophoresis electronic paper ghost detection system and detection method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150805 |