CN101409043A - LCD device and image control method thereof - Google Patents
LCD device and image control method thereof Download PDFInfo
- Publication number
- CN101409043A CN101409043A CNA2007101809418A CN200710180941A CN101409043A CN 101409043 A CN101409043 A CN 101409043A CN A2007101809418 A CNA2007101809418 A CN A2007101809418A CN 200710180941 A CN200710180941 A CN 200710180941A CN 101409043 A CN101409043 A CN 101409043A
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- power regulation
- liquid crystal
- numerical value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Liquid Crystal (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
An LCD device comprises an LCD module, a backlight module and a power regulation module. The LCD module has a plurality of pixels. The backlight module is arranged adjacent to the LCD module. The power regulation module receives an image signal, and generates a spatial frequency numerical value according to the image signal, and regulates the penetration rate of each pixel of the LCD module and the luminous intensity of the backlight module based on the spatial frequency numerical value.
Description
Technical field
The present invention relates to a kind of display device and image control method thereof, and be particularly related to a kind of liquid crystal indicator and image control method thereof.
Background technology
Along with liquid crystal indicator (Liquid Crystal Display apparatus, LCDapparatus) technical development is ripe gradually, it replaces traditional cathode-ray tube (CRT) (Cathode Ray Tube, CRT) display device, and extensively being applied in the various electronic product gradually.And the display mode of liquid crystal indicator is to rotate by the liquid crystal molecule in each pixel of different driven, makes each pixel have different penetrances, with GTGs different in the show image picture.Then, the light that cooperates backlight module again and sent makes liquid crystal indicator show various image frames.
Yet, when liquid crystal indicator shows that light and shade contrasts big complicated picture, because the voltage differences between different pixels is bigger, therefore can produce the voltage unbalanced state that distributes, this also can make and produce a uneven electric field in the display panels, and then causes liquid crystal molecule in the display panels to produce along uneven electric field and assemble.
And when display frame was the little simple picture of light and shade contrast by light and shade contrast big change suddenly, also because the factors such as gathering, driving element fabrication error or part liquid crystal molecule deterioration of impurity in the display panels, non-uniform electric field still can be temporarily residual.In addition, please refer to shown in Figure 1ly, it is the curve map of the corresponding driving voltage of penetrance of display panels.By among Fig. 1 as can be known, be commonly used to drive among the low-voltage area Z1 of display panels, the slope a of the corresponding driving voltage of its penetrance, slope b1, the b2 of high voltage district Z0, Z2 are big.In other words, be that liquid crystal molecule reaction for driving voltage in low-voltage area Z1 is comparatively sensitive, and this also can cause when most liquid crystal molecule and has rotated to show next picture according to driving voltage, but the partial image of previous picture is not still eliminated as yet because of temporary transient residual non-uniform electric field, therefore causes picture to produce the problem of image residue (Image Sticking).
Therefore, how to provide a kind of and can reduce liquid crystal indicator and the image control method thereof that image residue produces, become one of important topic.
Summary of the invention
Because above-mentioned problem, purpose of the present invention can reduce liquid crystal indicator and the image control method thereof that image residue produces for providing a kind of.
Edge is for reaching above-mentioned purpose, to comprise a LCD MODULE, a backlight module and a power regulation module according to a kind of liquid crystal indicator of the present invention.LCD MODULE has a plurality of pixels.Backlight module is adjacent to LCD MODULE.Power regulation module receives a signal of video signal, and produces a spatial frequency numerical value according to signal of video signal, and power regulation module is adjusted the penetrance of each pixel of LCD MODULE and the luminous intensity of backlight module according to spatial frequency numerical value.
For achieving the above object, image control method according to a kind of liquid crystal indicator of the present invention, liquid crystal indicator comprises a LCD MODULE, a backlight module and a power regulation module, LCD MODULE has a plurality of pixels, backlight module is adjacent to LCD MODULE, image control method may further comprise the steps: at first, receive a signal of video signal by power regulation module.Then, produce a spatial frequency numerical value by power regulation module according to signal of video signal.At last, adjust the penetrance of each pixel of LCD MODULE and the luminous intensity of backlight module by power regulation module according to spatial frequency numerical value.
From the above, analyze the spatial frequency numerical value of signal of video signal by a power regulation module according to a kind of liquid crystal indicator of the present invention and image control method thereof, therefore when the spatial frequency numerical value of signal of video signal is higher, promptly represent this signal of video signal picture light and shade to display to bigger, this moment, power regulation module can not change the penetrance of each pixel of LCD MODULE and the luminous intensity of backlight module.And when the spatial frequency numerical value of signal of video signal is low, promptly represent this signal of video signal picture light and shade to display to smaller, so power regulation module can improve the penetrance of each pixel of LCD MODULE, makes liquid crystal molecule in the high voltage region start.Compare with known technology, the image residue influence that the present invention produces because of the impurity shelter except the high penetration that can utilize each pixel reduces, more can utilize liquid crystal molecule when high voltage region is worked, the more insensitive characteristic of its reaction for voltage, reduce the reaction velocity of liquid crystal molecule for voltage, and then before the partial image that reduces last picture eliminated as yet, most liquid crystal molecule rotated with the image residue situation that shows that next picture is produced according to driving voltage.
In addition, power regulation module and downgrades the luminous intensity of backlight module except that the penetrance that improves each pixel of LCD MODULE, the display frame overall brightness of liquid crystal indicator is not changed, and therefore can save the power consumption of backlight module.
Description of drawings
Fig. 1 is the synoptic diagram in the operating voltage interval of known display panels;
Fig. 2 is the calcspar of a kind of liquid crystal indicator of the preferred embodiment of the present invention;
Fig. 3 A and Fig. 3 B are the synoptic diagram of power regulation module compute mode of the present invention;
Fig. 4 is the synoptic diagram in the operating voltage interval of LCD MODULE of the present invention; And
Fig. 5 is the process flow diagram of image control method of a kind of liquid crystal indicator of the preferred embodiment of the present invention.
[main element symbol description]
1: liquid crystal indicator
11: LCD MODULE
12: backlight module
13: power regulation module
131: analytic unit
132: adjustment unit
133: memory cell
A, b1, b2: slope
D
B: the backlight drive signal
D
I: image driving signal
F
S: spatial frequency numerical value
G1, G2: GTG value
I: signal of video signal
I
M: display frame
L: light
P: pixel
S: section
S1～S3: the process step of image control method
T: trap signal
Z1: low-voltage area
Z0, Z2: high voltage region
Embodiment
Hereinafter with reference to correlative type, illustrate that wherein similar elements is represented with same numeral according to a kind of liquid crystal indicator of the present invention and image control method thereof.
Please refer to shown in Figure 2ly, a kind of liquid crystal indicator 1 of the preferred embodiment of the present invention comprises a LCD MODULE 11, a backlight module 12 and a power regulation module 13.
And adjust the penetrance of display panels 11 each pixel P and the luminous intensity of backlight module 12 by power regulation module 13, the image residue situation that picture produces can be reduced, and the power consumption of backlight module 12 can be saved.
Then, please be simultaneously with reference to shown in Fig. 2, Fig. 3 A and Fig. 3 B, with the working method of the power regulation module 13 of explanation present embodiment.In addition, this enforcement for convenience of description, power regulation module 13 to be doing computing to the GTG value of a certain section S among the signal of video signal I, and trap signal T to utilize the ordered series of numbers of (1,2 ,-1) be that example explains.It should be noted that power regulation module 13 can do computing to GTG values all among the signal of video signal I, and the parameter setting of trap signal T also do not exceed with present embodiment, end is can obtain clear and definite spatial frequency numerical value F
SFor preferentially considering.
Please be simultaneously with reference to shown in Fig. 2 and Fig. 3 A, after analytic unit 131 received signal of video signal I, it can utilize trap signal T that the GTG value corresponding to each pixel P among the signal of video signal I is done computing.In the present embodiment, the section S among the signal of video signal I is that the ordered series of numbers of (10,0,10,0,10) is that example explains with the GTG value.Therefore, if playing the 1st GTG value G1 with a left side is example, then analytic unit 131 can be a mid point and corresponding with the mid point of trap signal T with GTG value G1, gets the GTG value G2 adjacent with GTG value G1 again and comes to do computing with trap signal T.In this, the value of GTG value G1 is 10, and the value of GTG value G2 is 0, do computing with the included value of trap signal T after,
2×10+-1×0＝20
Wherein, because the GTG value G2 adjacent with GTG value G1 only has one, so first value-1 among the trap signal T promptly is omitted.By that analogy, then can obtain one group of new ordered series of numbers (20 ,-20,20 ,-20,20).Then, analytic unit 131 takes absolute value all values in the ordered series of numbers (20 ,-20,20 ,-20,20) after the addition again, can obtain spatial frequency numerical value F
SBe 100.And this spatial frequency numerical value F
SNumerical value can be represented the display frame I that exported with signal of video signal I
M, for light and shade to bigger complicated picture.Therefore, adjustment unit 132 is receiving signal of video signal I and spatial frequency numerical value F
SAfter, promptly according to signal of video signal I image output drive signal D
ITo LCD MODULE 11, and output backlight drive signal D
BTo backlight module 12, but can not change the penetrance of each pixel P in the LCD MODULE 11 and the luminous intensity of backlight module 12.
Then, please be simultaneously with reference to shown in Fig. 2 and Fig. 3 B, when the GTG value of the section S in signal of video signal I was (10,10,10,10,10), analytic unit 131 can obtain one group of new ordered series of numbers (0,0,0,0,0) through after the computing same as described above.Then, analytic unit 131 takes absolute value all values after the addition, can obtain spatial frequency numerical value F
SBe 0.And this spatial frequency numerical value F
SThen represent the display frame I that exported with signal of video signal I
M, for light and shade to smaller simple picture.Therefore, adjustment unit 132 is receiving signal of video signal I and spatial frequency numerical value F
SAfter, adjustment unit 132 can be by exporting the image driving signal D of LCD MODULE 11 to
IImprove the penetrance of LCD MODULE 11 each pixel P, and by exporting the backlight drive signal D of backlight module 12 to
BDowngrade the luminous intensity of backlight module 12.
Please refer to shown in Figure 4ly, it is the curve map of the corresponding driving voltage of penetrance of LCD MODULE.By improving the penetrance of LCD MODULE 11 each pixel P, make LCD MODULE 11 in high voltage region Z0, Z2 start.Therefore, by among the figure as can be known, slope b1, the b2 of the corresponding driving voltage of penetrance are less, this represents that also liquid crystal molecule is more insensitive for the reaction of driving voltage.Utilize this characteristic can reduce the reaction velocity of liquid crystal molecule, and then before the partial image that reduces last picture eliminated as yet, most liquid crystal molecule rotated with the image residue situation that shows that next picture is produced according to driving voltage for driving voltage.
Please refer to shown in Figure 5ly, the image control method of a kind of liquid crystal indicator of the preferred embodiment of the present invention is applied to liquid crystal indicator 1 as shown in Figure 2.Because liquid crystal indicator 1 has been specified in, so repeat no more.Image control method comprises that step S1 is to step S3.
Step S1 receives a signal of video signal I by power regulation module 13.
Step S2 produces a spatial frequency numerical value F by power regulation module 13 according to signal of video signal I
S
Step S3 passes through power regulation module 13 according to spatial frequency numerical value F
SAdjust the penetrance of LCD MODULE 11 each pixel P and the luminous intensity of backlight module 12.
In sum, because of analyze the spatial frequency numerical value of signal of video signal by a power regulation module according to a kind of liquid crystal indicator of the present invention and image control method thereof, therefore when the spatial frequency numerical value of signal of video signal is higher, promptly represent this signal of video signal picture light and shade to display to bigger, this moment, power regulation module can not change the penetrance of each pixel of LCD MODULE and the luminous intensity of backlight module.And when the spatial frequency numerical value of signal of video signal is low, promptly represent this signal of video signal picture light and shade to display to smaller, so power regulation module can improve the penetrance of each pixel of LCD MODULE, makes liquid crystal molecule in the high voltage region start.Compare with known technology, the image residue influence that the present invention produces because of the impurity shelter except the high penetration that can utilize each pixel reduces, more can utilize liquid crystal molecule when high voltage region is worked, the more insensitive characteristic of its reaction for voltage, reduce liquid crystal molecule at the susceptibility of some voltage range to penetrance, and then before the partial image that reduces last picture eliminated as yet, most liquid crystal molecule rotated with the image residue situation that shows that next picture is produced according to driving voltage.
In addition, power regulation module and downgrades the luminous intensity of backlight module except that the penetrance that improves each pixel of LCD MODULE, the display frame overall brightness of liquid crystal indicator is not changed, and therefore can save the power consumption of backlight module.
The above only is exemplary but not is restrictive.Anyly do not break away from spirit of the present invention and category, and, all should be included in the claimed scope of appended claim its equivalent modifications of carrying out or change.
Claims (12)
1, a kind of liquid crystal indicator comprises:
One LCD MODULE has a plurality of pixels;
One backlight module is adjacent to described LCD MODULE; And
One power regulation module, receive a signal of video signal, and produce a spatial frequency numerical value according to described signal of video signal, described power regulation module is adjusted the penetrance of described each pixel of LCD MODULE and the luminous intensity of described backlight module according to described spatial frequency numerical value.
2, liquid crystal indicator as claimed in claim 1, wherein said power regulation module comprises:
One analytic unit receives described signal of video signal, and according to described signal of video signal and a trap signal to produce described spatial frequency numerical value; And
One adjustment unit is electrically connected with described analytic unit, described LCD MODULE and described backlight module, and reception and the described signal of video signal of foundation and described spatial frequency numerical value are exported a backlight drive signal and an image driving signal.
3, liquid crystal indicator as claimed in claim 2, wherein said adjustment unit are adjusted the described luminous intensity of described backlight module with described backlight drive signal.
4, liquid crystal indicator as claimed in claim 2, wherein said adjustment unit are adjusted the described penetrance of described each pixel of LCD MODULE with described image driving signal.
5, liquid crystal indicator as claimed in claim 2, wherein said power regulation module also has a memory cell, and it is electrically connected with described analytic unit, and imports described trap signal to described analytic unit.
6, liquid crystal indicator as claimed in claim 1, wherein said backlight module sends a light according to described luminous intensity, and described light passes each pixel that corresponds to described penetrance in the described LCD MODULE, to produce a display frame.
7, liquid crystal indicator as claimed in claim 1, wherein said backlight module are a cold-cathode fluorescence lamp light emitting module, a hot-cathode fluorescent lamp light emitting module, a lumination of light emitting diode module or an organic electroluminescent module.
8, a kind of image control method of liquid crystal indicator, described liquid crystal indicator comprises a LCD MODULE, a backlight module and a power regulation module, described LCD MODULE has a plurality of pixels, described backlight module is adjacent to described LCD MODULE, and described image control method may further comprise the steps:
Receive a signal of video signal by described power regulation module;
Produce a spatial frequency numerical value by described power regulation module according to described signal of video signal; And
Adjust the penetrance of described each pixel of LCD MODULE and the luminous intensity of described backlight module by described power regulation module according to described spatial frequency numerical value.
9, image control method as claimed in claim 8, wherein said power regulation module has an analytic unit, and the step that described power regulation module produces described spatial frequency numerical value also comprises following substep:
Receive described signal of video signal by described analytic unit; And
By described analytic unit according to described signal of video signal and a trap signal to produce described spatial frequency numerical value.
10, image control method as claimed in claim 9, wherein said power regulation module also has an adjustment unit, be electrically connected with described analytic unit, described LCD MODULE and described backlight module, the step that described power regulation module is adjusted described LCD MODULE and described backlight module also comprises following substep:
Receive described signal of video signal and described spatial frequency numerical value by described adjustment unit; And
Export a backlight drive signal and an image driving signal by described adjustment unit according to described signal of video signal and described spatial frequency numerical value.
11, image control method as claimed in claim 10, further comprising the steps of:
Described adjustment unit is adjusted the described luminous intensity of described backlight module by described backlight drive signal;
Described adjustment unit is adjusted the described penetrance of described each pixel of LCD MODULE by described image driving signal.
12, image control method as claimed in claim 8, further comprising the steps of:
Described backlight module sends a light according to described luminous intensity; And
Pass each pixel that corresponds to described penetrance in the described LCD MODULE by described light, to produce a display frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101809418A CN101409043B (en) | 2007-10-09 | 2007-10-09 | LCD device and image control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101809418A CN101409043B (en) | 2007-10-09 | 2007-10-09 | LCD device and image control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101409043A true CN101409043A (en) | 2009-04-15 |
| CN101409043B CN101409043B (en) | 2012-02-01 |
Family
ID=40572036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101809418A Expired - Fee Related CN101409043B (en) | 2007-10-09 | 2007-10-09 | LCD device and image control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101409043B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873535A (en) * | 2018-05-31 | 2018-11-23 | 友达光电股份有限公司 | Liquid crystal display panel |
| CN111524479A (en) * | 2020-06-16 | 2020-08-11 | 广州视源电子科技股份有限公司 | Method, device and storage medium for eliminating ghost |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3809573B2 (en) * | 2000-06-09 | 2006-08-16 | 株式会社日立製作所 | Display device |
| JP4196959B2 (en) * | 2004-05-20 | 2008-12-17 | セイコーエプソン株式会社 | ELECTRO-OPTICAL DEVICE, ITS DRIVE CIRCUIT, AND ELECTRONIC DEVICE |
| US8063920B2 (en) * | 2004-10-13 | 2011-11-22 | Koninklijke Philips Electronics N.V. | Display time control for images |
-
2007
- 2007-10-09 CN CN2007101809418A patent/CN101409043B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873535A (en) * | 2018-05-31 | 2018-11-23 | 友达光电股份有限公司 | Liquid crystal display panel |
| CN108873535B (en) * | 2018-05-31 | 2021-07-06 | 友达光电股份有限公司 | Liquid crystal display panel |
| CN111524479A (en) * | 2020-06-16 | 2020-08-11 | 广州视源电子科技股份有限公司 | Method, device and storage medium for eliminating ghost |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101409043B (en) | 2012-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101441351B (en) | LCD device | |
| US8830158B2 (en) | Method of local dimming a light source, light source apparatus for performing the method, and display apparatus having the light source apparatus | |
| KR101571732B1 (en) | Liquid crystal display and method for driving the same | |
| CN101989415B (en) | Liquid crystal display device and driving method thereof | |
| CN101178874B (en) | Backlight device, method of driving backlight, and color image display apparatus | |
| EP1667102B1 (en) | Backlight driving device, backlight driving method, and liquid crystal display device | |
| CN108877694A (en) | A kind of dual-layered liquid crystal screen, backlight brightness control method, device and electronic equipment | |
| CN101681582B (en) | Image display device | |
| CN103680413A (en) | Image processing device and image processing method | |
| CN1811537A (en) | Gamma correction device, display apparatus including the same, and method of gamma correction therein | |
| CN103310765A (en) | Backlight brightness compensation method and display device | |
| US8314820B2 (en) | Backlight adjustment device of a display and method thereof | |
| CN105405412A (en) | Backlight driving control method and system | |
| US9041745B2 (en) | Method of boosting a local dimming signal, boosting drive circuit for performing the method, and display apparatus having the boosting drive circuit | |
| CN101546521B (en) | Method of controlling backlight module, backlight controller and display device using the same | |
| US7692624B2 (en) | Liquid crystal display, method for displaying color images, and method for controlling light sources of an LCD panel | |
| US20090058792A1 (en) | Backlight unit, liquid crystal display device including the same, and localized dimming method thereof | |
| CN110136631B (en) | Method for adjusting display picture of display device | |
| CN101409043B (en) | LCD device and image control method thereof | |
| JP4894149B2 (en) | Liquid crystal display | |
| CN201748359U (en) | Direct type light-emitting diode (LED) backlight source device | |
| US8179407B2 (en) | Method of driving a display apparatus, and display apparatus and timing controller for performing the method | |
| CN1224250C (en) | Apparatus and method for defective pixel remediation of liquid crystal panel | |
| US20080111783A1 (en) | Method and system for adjusting luminance of a cold cathode fluorescent lamp | |
| CN102820008B (en) | Display control circuit and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: INNOLUX DISPLAY CO., LTD. Effective date: 20111208 Owner name: INNOLUX DISPLAY CO., LTD. Free format text: FORMER OWNER: QIMEI ELECTRONIC CO LTD Effective date: 20111208 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20111208 Address after: Taiwan, China Hsinchu science and Technology Industrial Park, Miaoli County, Southern Town, science Road, No. 160 Applicant after: CHI MEI OPTOELECTRONICS CORP. Address before: Taiwan, China Hsinchu science and Technology Industrial Park, Miaoli County, Southern Town, science Road, No. 160 Applicant before: INNOLUX DISPLAY CORP. Effective date of registration: 20111208 Address after: Taiwan, China Hsinchu science and Technology Industrial Park, Miaoli County, Southern Town, science Road, No. 160 Applicant after: INNOLUX DISPLAY CORP. Address before: Tainan County, Taiwan, China Applicant before: CHI MEI OPTOELECTRONICS CORP. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20171009 |