CN100361192C - Method for correcting LCD picture of mobile communication terminal - Google Patents
Method for correcting LCD picture of mobile communication terminal Download PDFInfo
- Publication number
- CN100361192C CN100361192C CNB2004100866496A CN200410086649A CN100361192C CN 100361192 C CN100361192 C CN 100361192C CN B2004100866496 A CNB2004100866496 A CN B2004100866496A CN 200410086649 A CN200410086649 A CN 200410086649A CN 100361192 C CN100361192 C CN 100361192C
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- lcd
- gamma
- picture
- colour temperature
- correction
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- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B1/00—Hats; Caps; Hoods
- A42B1/24—Hats; Caps; Hoods with means for attaching articles thereto, e.g. memorandum tablets or mirrors
- A42B1/247—Means for attaching eyewear
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B1/00—Hats; Caps; Hoods
- A42B1/18—Coverings for protecting hats, caps or hoods against dust, rain, or sunshine
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C3/00—Special supporting arrangements for lens assemblies or monocles
- G02C3/02—Arrangements for supporting by headgear
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B1/00—Hats; Caps; Hoods
- A42B1/02—Hats; Stiff caps
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Ophthalmology & Optometry (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a method for correcting LCD (liquid crystal display) picture of mobile communication terminal. The method includes the following steps: a step 1, acquiring the greyscale coefficient and color temperature of LCD characteristic measured by a LCD characteristic measuring device and determining as a standard LCD characteristic; a step 2, making multiple searching lists applying the greyscale coefficient and color temperature with certain spaces in the LCD characteristic, and storing them in a memory; a step 3, composing the greyscale coefficient and color temperature list for representing the searching lists applying the greyscale coefficient and color temperature, and making LCD picture correcting menu; a step 4, applying the searching lists corresponding to the greyscale coefficient and color temperature selected in the LCD picture correcting menu for LCD picture correction, and executing color temperature inverse gamma correction for LCD regions. The effect of the invention is that when the photo or picture is not clear, or can not be seen clearly in the house or outside of the house, the proper picture quality can be selected by changing the searching lists.
Description
Technical field
The present invention relates to the LCD frame correction method of mobile communication terminal, relate in particular to a kind of look-up table of proofreading and correct each different gamma, colour temperature in the LCD characteristic that has, can select appropriate table of corrections to proofread and correct the LCD frame correction method of the mobile communication terminal of LCD picture according to user's hobby.
Background technology
LCD is a kind of of image display device, as the display device of mobile communication terminal.Colour temperature is the important parameter of expression LCD characteristic, with the brightness of numerical value performance light.The color meter of object is shown the blackbody temperature of identical coloured light, and for example, the colour temperature of incandescent lamp light is about 2800K, and the colour temperature of fluorescent light light is about about 6500K.
For LCD, even the gray level of the apparent color brightness of input is identical, difference also can take place in the brightness of each color that reality output shows, so need proofread and correct, colour temperature is consistent.And, the human organs of vision have the nonlinear characteristic as gamma curves (being similar to gamma curve) when differentiating brightness, the brightness of LCD goes out linear display characteristic with respect to the gray level representation of input, so, need carry out contrary Gamma correction in order to show the color that needs.
Fig. 1 is the workflow diagram of the LCD frame correction method of mobile communication terminal in the prior art.As shown in the figure, it comprises following several steps: step 1, all scope gray levels of nonlinear characteristic are divided into a plurality of intervals, and utilize the RGB-Lxy chromaticity coordinates to carry out each interval linear modelling; Step 2 is utilized each intervals linear modeling result of described step, searches the brightness that expression needs and the RGB combination of colour temperature, decision white color temperature point; Step 3 is utilized above-mentioned modeling result, even in as achromatic grey, also keeps the colour temperature of white, and the gray level of contrary Gamma correction is provided simultaneously.
All gray levels are divided into a plurality of intervals, each mutually different linear model is applied to gray level by interval division, obtain the RGB-Lxy model, utilize each interval modeling result decision colour temperature white point.
According to the described RGB-Lxy model of obtaining, carry out contrary Gamma correction.Contrary Gamma correction is the target gamma curves of decision about grey, and after giving the gamma value that sets the goal, decision target gamma curves is obtained object brightness about gray level from the gamma curves of decision.
After the object brightness decision, obtain the target colour temperature, utilize above-mentioned target color coordinates to obtain target XYZ chromaticity coordinates value, utilize the rgb value of above-mentioned RGB-Lxy Model Calculation about the contrary Gamma correction of warp of target XYZ chromaticity coordinates value.And, utilize the RGB gray level of calculating to finish look-up table.
According to the interval of LCD, the look-up table of finishing is applied to the contrary Gamma correction of colour temperature, proofread and correct the LCD picture.
But but there are the following problems for prior art, that is, mobile communication terminal has only one according to the contrary made look-up table of Gamma correction of the interval application color temperature of LCD, so the LCD picture is to proofread and correct according to fixing value, can't tackle external environment condition rightly.
Content of the present invention
The present invention proposes at the defective that exists in the prior art just, purpose is to provide a kind of LCD frame correction method of mobile communication terminal, making has been used each and has been met the gamma of LCD characteristic, a plurality of look-up tables of colour temperature, the look-up table of can user application selecting is proofreaied and correct the LCD picture.
For achieving the above object, the present invention includes following several steps: step 1, obtain gamma, colour temperature with the LCD characteristic of LCD feature measurement device measuring, decision is as the LCD characteristic of standard; Step 2 is made each gamma at a plurality of set intervals of LCD characteristic middle distance of having used in above-mentioned decision, the look-up table of colour temperature, and it is stored in storer; Step 3 constitutes above-mentioned gamma, the colour temperature tabulation of having used the look-up table of each gamma, colour temperature of expression, makes LCD picture correction menu; Step 4 is applied to the LCD picture to the look-up table corresponding with gamma, the colour temperature selected and proofreaies and correct in above-mentioned LCD picture correction menu.Above-mentioned correction comprises carries out the contrary Gamma correction of each interval colour temperature of LCD.
As the above-mentioned detailed description of doing, the present invention has following effect,, when photo or fuzzy pictures are unclear, when when indoor or outdoors does not see, by the conversion look-up table, can select appropriate image quality that is.
Another effect of the present invention is, though only by original picture brightness or light and shade setting be difficult to the to be improved effect of LCD image quality, by change gamma, colour temperature, can improve because of the conversion of look-up table because of the LCD bad characteristic shows fuzzy image.
Brief description of drawings
Fig. 1 is the workflow diagram of the LCD frame correction method of mobile communication terminal in the prior art;
Fig. 2 is that the mobile communication terminal work of the embodiment of the invention constitutes block diagram;
Fig. 3 is the workflow diagram of LCD frame correction method of the mobile communication terminal of the embodiment of the invention;
Fig. 4 is the LCD picture correction menu picture conversion exemplary plot of the mobile communication terminal of the embodiment of the invention;
Fig. 5 be before the LCD picture correct application with the exemplary plot of picture relatively afterwards.
Embodiment
With reference to the accompanying drawings, describe embodiments of the invention in detail.
Fig. 2 is that the work of the mobile communication terminal of the embodiment of the invention constitutes block diagram.As shown in the figure, it comprises following several sections: keypad 10, the key assignments of each gamma that it produces and input is selected in LCD picture correction menu, the look-up table of colour temperature; Look-up table 30, its storage meet each gamma of LCD characteristic, the nothing of colour temperature is proofreaied and correct the correction RGB gray level of RGB gray level correspondence; Terminal modem 20, it checks the RGB gray level of proofreading and correct with reference to the look-up table 30 of described selection, is applied to the LCD picture and proofreaies and correct; LCD 40, receive the input through the RGB of above-mentioned correction gray level, the color that output is corresponding with it, display frame.
Keypad 10 produces key assignments according to user's key entry, outputs to terminal modem 20, and the operation that terminal modem 20 is carried out according to the key assignments conversion that produces demonstrates the operation screen after the conversion.Keypad 10 is used to select LCD picture correction menu, select the look-up table of each gamma, colour temperature, terminal modem 20 is applied to LCD 40 to the look-up table of selecting 30, searches the RGB gray level of proofreading and correct with reference to the look-up table 30 of above-mentioned selection and is applied to LCD 40.
Look-up table 30 is a kind of correction RGB gray levels of proofreading and correct RGB gray level correspondence at the nothing of each gamma that meets the LCD characteristic, colour temperature of having stored, and it has a plurality of tables of having used multiple gamma, colour temperature.
Fig. 3 is the workflow diagram of LCD frame correction method of the mobile communication terminal of the embodiment of the invention.As shown in the figure, it comprises following several steps: step 1, and obtain gamma, colour temperature, and determine a LCD characteristic as standard with the LCD characteristic of LCD feature measurement device measuring; Step 2 is made each gamma at a plurality of set intervals of LCD characteristic middle distance of having used in above-mentioned standard, the look-up table of colour temperature, and it is stored in storer; Step 3 constitutes above-mentioned gamma, the colour temperature tabulation of having used the look-up table of each gamma, colour temperature of expression, makes LCD picture correction menu; Step 4 is applied to the LCD picture to the look-up table corresponding with gamma, the colour temperature selected and proofreaies and correct in above-mentioned LCD picture correction menu, carry out the contrary Gamma correction of each interval colour temperature of LCD.
The mobile communication terminal deviser utilizes LCD feature measurement device measuring LCD characteristic, obtains gamma, colour temperature.If measure the LCD characteristics at a plurality of LCD, then can determine LCD characteristic as standard, be standard with the LCD characteristic of above-mentioned decision, select appropriate gamma, colour temperature.
Utilize the contrary gamma revision method of each interval colour temperature of LCD, make and a plurality ofly used the look-up table of each gamma of meeting above-mentioned LCD characteristic, colour temperature and be stored in storer.
In LCD picture correction menu, the had display application gamma value of look-up table of each gamma, colour temperature and the tabulation of color temperature value, after the user has selected LCD picture correction menu, the tabulation of output gamma value and color temperature value.If the user has selected gamma value and color temperature value, then output is set to the prompting that the LCD picture is proofreaied and correct to the gamma value of above-mentioned selection and color temperature value.
The look-up table that the gamma value of terminal modem handle and above-mentioned selection and color temperature value are corresponding is applied to the LCD picture and proofreaies and correct, and carries out the contrary Gamma correction of each interval colour temperature of LCD.
Fig. 4 is the picture conversion exemplary plot of LCD picture correction menu of the mobile communication terminal of the embodiment of the invention, and the menu tree that the following describes LCD picture correction menu constitutes.After having selected the picture setup menu, No. 6 menu output picture atmosphere, after the selection picture atmosphere, output gamma value and the color temperature value set interval of distance and selective listing with different value.The user after gamma that decision needs, colour temperature, if select No. 5 menus of gamma value 2.2, color temperature value 6000K, Pop-up message then, output notice is set to the statement of gamma value 2.2, color temperature value 6000K.
Fig. 5 be before the LCD picture correct application with the exemplary plot of picture relatively afterwards.As shown in the figure, when using and gamma, the corresponding look-up table of colour temperature in the past, when the LCD picture is unintelligible, select with the user need the corresponding look-up table of gamma, colour temperature, the image sharpness of application LCD picture afterwards is improved.
The following describes the LCD picture corrective action of the mobile communication terminal when the user selects appropriate gamma, colour temperature in LCD picture correction menu.
The user feels that the image quality sharpness of LCD picture is low, selects LCD picture correction menu in order to improve better image quality.After selecting LCD picture correction menu, mobile communication terminal outputs to multiple gamma, the color temperature value of the look-up table of storing in the storer on the display screen with tabular form.At this moment, can mark check mark on the gamma that is applied to present LCD picture correction, colour temperature exports.
The user selects appropriate gamma, colour temperature according to external environment condition in gamma, colour temperature tabulation.After the user has selected gamma, colour temperature, the mobile communication terminal Pop-up message, the gamma that output notice is selected, the statement that colour temperature is employed, simultaneously, from a plurality of look-up tables of memory stores, be written into the corresponding look-up table of selecting with the user of gamma, colour temperature, be applied to the LCD picture and proofread and correct.
LCD picture after the user confirms to proofread and correct judges whether the image quality sharpness improves.If image quality improving is satisfied inadequately, the user then selects other gamma, colour temperature, and mobile communication terminal is written into and the gamma of selecting, the corresponding look-up table of colour temperature again, is applied to the LCD picture and proofreaies and correct.Recover LCD picture timing when the user wants to utilize acquiescence gamma, colour temperature, can select acquiescence gamma, the colour temperature of LCD picture correction menu.
Claims (3)
1. the LCD frame correction method of a mobile communication terminal is characterized in that, comprising:
Step 1 obtain gamma, colour temperature with the LCD characteristic of LCD feature measurement device measuring, and decision is as the LCD characteristic of standard;
Step 2 is made each gamma at a plurality of set intervals of LCD characteristic middle distance of having used in described decision, the look-up table of colour temperature, and it is stored in storer;
Step 3 constitutes described gamma, the colour temperature tabulation of having used the look-up table of each gamma, colour temperature of expression, makes LCD picture correction menu;
Step 4, according to the corresponding look-up table of in described LCD picture correction menu, selecting of gamma, colour temperature, the LCD picture is proofreaied and correct.
2. the LCD frame correction method of mobile communication terminal according to claim 1 is characterized in that, described correction to the LCD picture comprises the contrary Gamma correction of the colour temperature of carrying out each set interval section of LCD.
3. the LCD frame correction method of mobile communication terminal according to claim 1 is characterized in that, described method further comprises:
In gamma, the colour temperature of described LCD picture correction menu are tabulated,, and notify the user with gamma, the colour temperature final election of using now.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040007634 | 2004-02-05 | ||
| KR1020040007634A KR100595648B1 (en) | 2004-02-05 | 2004-02-05 | Display revision method for liquid crystal display of mobile communication terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1652196A CN1652196A (en) | 2005-08-10 |
| CN100361192C true CN100361192C (en) | 2008-01-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100866496A Expired - Fee Related CN100361192C (en) | 2004-02-05 | 2004-11-19 | Method for correcting LCD picture of mobile communication terminal |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100595648B1 (en) |
| CN (1) | CN100361192C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100485772C (en) * | 2005-12-08 | 2009-05-06 | 鸿富锦精密工业（深圳）有限公司 | Display device brightness control system and method |
| US8144172B2 (en) | 2006-05-24 | 2012-03-27 | Panasonic Corporation | Color temperature correction device and display device |
| CN101667416B (en) * | 2008-09-05 | 2012-08-29 | 深圳Tcl新技术有限公司 | Method for adjusting and analyzing color temperature and GAMMA of display |
| CN101840688B (en) * | 2010-05-07 | 2012-12-19 | 青岛海信电器股份有限公司 | Gamma debugging method, device and system of liquid crystal display terminal |
| CN104409060A (en) * | 2014-12-02 | 2015-03-11 | 昆山国显光电有限公司 | Color temperature switching device as well as method and display device thereof |
| CN106101680B (en) | 2015-05-06 | 2018-12-25 | 小米科技有限责任公司 | Acquisition parameters setting method and device |
| CN106373527B (en) * | 2016-11-11 | 2018-09-07 | 武汉精测电子集团股份有限公司 | The gamma and colour temperature Automatic adjustment method of a kind of highest and minimum gray scale |
| KR102314647B1 (en) | 2017-11-23 | 2021-10-19 | 삼성전자주식회사 | Method and device for processing an image and recording medium thereof |
| CN109801603A (en) * | 2019-03-12 | 2019-05-24 | 徐丽萍 | The method for adjusting liquid crystal display colour temperature according to the illumination of external ambient light |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125373A (en) * | 1994-08-06 | 1996-06-26 | 三星电子株式会社 | Method and apparatus for adjusting digital brightness coefficient |
| US6297791B1 (en) * | 1997-11-21 | 2001-10-02 | Seiko Epson Corporation | Adjustment method of display device |
| CN1395229A (en) * | 2001-07-10 | 2003-02-05 | 三星电子株式会社 | Colour correcting liquid crystal display and drive method |
| CN1428763A (en) * | 2001-12-21 | 2003-07-09 | 夏普株式会社 | Correction property detemining device, method and display device |
-
2004
- 2004-02-05 KR KR1020040007634A patent/KR100595648B1/en not_active IP Right Cessation
- 2004-11-19 CN CNB2004100866496A patent/CN100361192C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125373A (en) * | 1994-08-06 | 1996-06-26 | 三星电子株式会社 | Method and apparatus for adjusting digital brightness coefficient |
| US6297791B1 (en) * | 1997-11-21 | 2001-10-02 | Seiko Epson Corporation | Adjustment method of display device |
| CN1395229A (en) * | 2001-07-10 | 2003-02-05 | 三星电子株式会社 | Colour correcting liquid crystal display and drive method |
| CN1428763A (en) * | 2001-12-21 | 2003-07-09 | 夏普株式会社 | Correction property detemining device, method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050079387A (en) | 2005-08-10 |
| CN1652196A (en) | 2005-08-10 |
| KR100595648B1 (en) | 2006-07-03 |
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Owner name: LANGCHAO LEJIN DIGITAL MOBILE COMMUNICATION CO., L Free format text: FORMER OWNER: LG ELECTRONICS (CHINA) R + D CENTER CO., LTD. Effective date: 20120319 |
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Free format text: CORRECT: ADDRESS; FROM: 100102 CHAOYANG, BEIJING TO: 264001 YANTAI, SHANDONG PROVINCE |
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Effective date of registration: 20120319 Address after: 264001 No. 228 Changjiang Road, Yantai economic and Technological Development Zone, Shandong, China Patentee after: Langchao Lejin Digital Mobile Communication Co., Ltd. Address before: Two Beijing 100102 Chaoyang District city in Wangjing Lize Park No. 203 Petrova building block B Patentee before: LG Electronic (China) Research and Development Center Co., Ltd. |
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Granted publication date: 20080109 Termination date: 20171119 |