CN101587686B - Liquid crystal display (LCD) device and control method thereof - Google Patents
Liquid crystal display (LCD) device and control method thereof Download PDFInfo
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- CN101587686B CN101587686B CN200810067423XA CN200810067423A CN101587686B CN 101587686 B CN101587686 B CN 101587686B CN 200810067423X A CN200810067423X A CN 200810067423XA CN 200810067423 A CN200810067423 A CN 200810067423A CN 101587686 B CN101587686 B CN 101587686B
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Abstract
The invention relates to a liquid crystal display (LCD) device and a control method thereof. The LCD device comprises a screen display control system and a gamma correction circuit, wherein the screendisplay control system comprises an input system used for setting a gamma value; the gamma correction circuit comprises a lookup table which comprises a plurality of basic lookup tables, wherein each basic lookup table corresponds to a gamma value and stores a plurality of original gray-scale data and a plurality of correction gray-scale data corresponding to the original gray-scale data. The gam ma correction circuit receives the original gray-scale data of video signals and searches corresponding correction gray-scale data according to the set gamma value and the basic loopup table corresponding to the gamma value, so that a user can adjust the gamma value at will or out of requirement to achieve the required display effect.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator and liquid crystal display device control method.
Background technology
Liquid crystal indicator has characteristics such as low diathermaneity, frivolous and low power consumption because of it, therefore day by day extensive in the use, and along with the ripe and innovation of correlation technique, its kind is also various day by day.In customized increasingly important today, the user can be by control system for screen display (the On Screen Display of display device, OSD) realize display device brightness (Brightness), contrast (Contrast), color temperature (Color Temperature), phase place display characteristic parameters such as (Phase) are regulated, to satisfy the display effect of individual preference.
Usually, when liquid crystal indicator converted vision signal image on the visual effect to and shows, the power of this vision signal was depended in the brightness of this display image.From complete black in complete white 256 five equilibriums, each five equilibrium is called a GTG with this liquid crystal indicator display frame.Because everyone is for the perception of GTG difference to some extent, and can be different because of environmental change.So, this liquid crystal indicator is carried out gamma correction (Gamma Correction) if want to reach to make customer satisfaction system display effect then need.The gamma value of liquid crystal indicator is the factory setting value at present, and the gamma value that sets usually is 2.2.The original luma data and the original luma data of the vision signal that the gamma correction table (Gamma Correction Table) by this gamma value correspondence stores are searched corresponding correction luma data, and vision signal is carried out gamma correction.
Yet, because the gamma value of liquid crystal indicator is the factory setting value at present, the user carries out behind the gamma correction image to vision signal and shows and can't regulate gamma value voluntarily according to personal like or demand when still having deviation, causes the not enough hommization of use of this liquid crystal indicator.
Summary of the invention
In order to solve the problem that the user can't regulate gamma value voluntarily, be necessary to provide a kind of user of making to regulate the liquid crystal indicator of gamma value voluntarily.
In addition, also be necessary to provide a kind of control method of above-mentioned liquid crystal indicator.
A kind of liquid crystal indicator, it comprises a control system for screen display and a gamma-correction circuit, this control system for screen display comprises that one is used for setting the input system of gamma value, this gamma-correction circuit comprises a look-up table, this look-up table comprises a plurality of basic look-up tables and a shared look-up table, the corresponding gamma value of each basic look-up table, store a plurality of first original luma data and a plurality of correction luma data corresponding in each basic look-up table with this first original luma data, should share corresponding all gamma values of look-up table, should share look-up table stores a plurality of second original luma data and a plurality of correction luma data corresponding with this second original luma data were arranged, the first original luma data of this gamma-correction circuit receiving video signals or the second original luma data, and maybe should share to search with the gamma value of this setting in look-up table at basic look-up table according to the gamma value of setting and proofread and correct luma data accordingly.
A kind of liquid crystal display device control method, it comprises the steps: to provide a liquid crystal indicator, it comprises a control system for screen display and a gamma-correction circuit, this control system for screen display comprises that one is used for setting the input system of gamma value, this gamma-correction circuit comprises a look-up table, this look-up table comprises a plurality of basic look-up tables and a shared look-up table, the corresponding gamma value of each basic look-up table, store a plurality of first original luma data and a plurality of correction luma data corresponding in each basic look-up table with this first original luma data, should share corresponding all gamma values of look-up table, this shared look-up table stores has a plurality of second original luma data and a plurality of correction luma data corresponding with this second original luma data; Input system by this control system for screen display resets gamma value; By the first original luma data or the second original luma data of this gamma-correction circuit receiving video signals, and maybe should share to search with the gamma value of this setting in look-up table at basic look-up table according to the gamma value of setting and proofread and correct luma data accordingly.
With respect to prior art, liquid crystal indicator of the present invention and liquid crystal display device control method are because this control system for screen display can be controlled this gamma-correction circuit according to the gamma value of user's input, have the function of searching corresponding correction luma data according to gamma value of setting and basic look-up table by this gamma-correction circuit, make the user regulate gamma value voluntarily according to preference or needs.
Description of drawings
Fig. 1 is the module diagram of liquid crystal indicator first embodiment of the present invention.
Fig. 2 is the look-up table synoptic diagram of liquid crystal indicator shown in Figure 1.
Fig. 3 is the process flow diagram of the control method that adopts of liquid crystal indicator shown in Figure 1.
Fig. 4 is the look-up table synoptic diagram of liquid crystal indicator second embodiment of the present invention.
Fig. 5 is the process flow diagram of the control method that adopted of liquid crystal indicator second embodiment of the present invention.
Embodiment
See also Fig. 1 and Fig. 2, Fig. 1 is the module diagram of liquid crystal indicator first embodiment of the present invention, and Fig. 2 is the look-up table synoptic diagram of liquid crystal indicator shown in Figure 1.This liquid crystal indicator 1 comprises a video signal input terminal 10, a microprocessor (MCU) 11, a control system for screen display 12, a gamma-correction circuit (Gamma Correction Circuit) 13 and one display panels 14.This video signal input terminal 10 is connected to this microprocessor 11, and this control system for screen display 12 is connected to this microprocessor 11, and this microprocessor 11 is connected to this gamma-correction circuit 13, and this gamma-correction circuit 13 is connected to this display panels 14.
This video signal input terminal 10 receives one from the vision signal of external circuit and be transferred to this microprocessor 11.This microprocessor 11 receives this vision signal, and according to this video signal generating one original luma data, should original luma data be transferred to this gamma-correction circuit 13 then.This original luma data is represented the brightness of image of this vision signal.
This gamma-correction circuit 13 comprise a look-up table (Look Up Table, LUT) 130, this look-up table 130 comprises a plurality of basic look-up tables 131.Each basic look-up table 131 corresponding gamma value, and store a plurality of original luma data and a plurality of correction luma data corresponding in each basic look-up table 131 with these a plurality of original luma data.This correction luma data is represented the brightness of image according to the vision signal after the corresponding gamma value correction.These a plurality of basic look-up table 131 stored data all adopt 10 bit compression methods to compress.
This gamma-correction circuit 13 receives the original luma data that this microprocessor 11 is transmitted, and in the basic look-up table that system initialization is set, search the corresponding correction luma data of this original luma data according to this original luma data, export this corrections luma data then and arrive this display panels 14.This display panels 14 shows correspondence image according to the correction luma data that receives.
This control system for screen display 12 comprises an input system (figure does not show) and a screen Control-Menu (figure does not show).The user is by this input system entr screen control command and call this screen Control-Menu.This screen Control-Menu can be presented on this display panels 14, and it is set with one and regulates the gamma option.This adjusting gamma option comprises a gamma range of adjustment.The user calls this screen Control-Menu according to this screen control command, thereby enters this adjusting gamma option, sets or regulate gamma value in this gamma range of adjustment.
When the user reset gamma value by this adjusting gamma option, this control system for screen display 12 sent corresponding control signal according to the gamma value that resets and gives this microprocessor 11.This microprocessor 11 is controlled this gamma-correction circuit 13 according to this control signal the basic look-up table 131 of the gamma value correspondence that resets is set at current look-up table.Simultaneously, this microprocessor 11 receives the current video signal, produces an original luma data and is transferred to this gamma-correction circuit 13.This gamma-correction circuit 13 is searched in this current look-up table correction luma data that should original luma data, and exports this correction luma data to this display panels 14.This display panels 14 is according to the correction luma data display image that receives.
Compared with prior art, because the gamma-correction circuit 13 of liquid crystal indicator 1 of the present invention comprises the basic look-up table 131 of corresponding each gamma value, this control system for screen display 12 is set up one and is regulated the gamma option, make the user reset gamma value by the look-up table function of controlling this gamma-correction circuit 13 according to preference or the selected gamma value of demand.And, because after the user imported gamma value, this gamma-correction circuit 13 only needed the basic look-up table 131 corresponding with the gamma value of user's input is set at current look-up table, therefore regulates simple fast.Moreover, because it is this gamma-correction circuit 13 carries out gamma correction with the form of basic look-up table 131, therefore accurate to the gamma value adjustment.
See also Fig. 3, it is the process flow diagram of the control method that adopted of liquid crystal indicator 1 shown in Figure 1.The control method of this liquid crystal indicator 1 mainly comprises the steps:
Step S11 resets gamma value by this control system for screen display 12;
The user calls a screen Control-Menu by the input system of this control system for screen display 12, thereby enters the adjusting gamma option of establishing in it, resets a gamma value in this gamma range of adjustment.This control system for screen display 12 correspondingly sends control signal and is transferred to this microprocessor 11.
Step S12 is set at current look-up table and is used for proofreading and correct luma data by the basic look-up table of this gamma-correction circuit 13 with the gamma value correspondence that resets.
This microprocessor 11 is controlled this gamma-correction circuit 13 according to this control signal, and the basic look-up table 131 of the gamma value correspondence that resets is set at current look-up table, is about to the pairing basic look-up table of gamma value that the user sets and is set at current look-up table.This gamma-correction circuit 13 is searched the correction luma data of original luma data correspondence according to the corresponding relation of current look-up table, and outputs to this display panels 14 and come display image, thereby has realized the adjustment of gamma value, and it is more convenient to make the user regulate gamma value.
See also Fig. 4, it is the look-up table synoptic diagram of liquid crystal indicator second embodiment of the present invention.This liquid crystal indicator (figure does not show) is similar to this liquid crystal indicator 1, and its key distinction is: this look-up table 230 comprises a plurality of basic look-up tables 231 and a shared look-up table 232.The corresponding basic look-up table 231 of each gamma value.All gamma values are to sharing look-up table 232.
Because for different gamma values, it is basic identical that the GTG value is not more than 32 pairing a plurality of correction luma data of original luma data, so the GTG value is defined as the first original luma data greater than 32 original luma data, this original luma data that is not more than 32 is defined as the second original luma data.
Each basic look-up table 231 corresponding gamma value, it stores a plurality of first original luma data and a plurality of correction luma data corresponding with this first original luma data under this gamma value.Should share look-up table 232 corresponding each gamma value, it stores a plurality of second original luma data and a plurality of correction luma data corresponding with this second original luma data under this gamma value.The combination of each basic look-up table 231 and shared look-up table 232 stores complete original luma data and the correction luma data corresponding with this original luma data under this gamma value.
After the user reset a gamma value, basic look-up table 231 and shared look-up table 232 that control system for screen display (figure do not show) is controlled the gamma value correspondence that gamma-correction circuit (scheming not show) resets correspondence by microprocessor (figure does not show) were set at current look-up table.Simultaneously, this microprocessor receives the current video signal, produces an original luma data and is transferred to this gamma-correction circuit.This gamma-correction circuit is according to searching in this current look-up table correction luma data that should original luma data, and exports this correction luma data to display panels (scheming not show).This display panels is according to the correction luma data display image that receives.
Compare with first embodiment, because the shared look-up table 232 of this gamma-correction circuit stores the second original luma data of all gamma value correspondences and a plurality of correction luma data of the second original luma data correspondence, therefore save the capacity of storer of store look-up tables of being used for, reduced cost.
See also Fig. 5, it is the process flow diagram of the control method that adopts of liquid crystal indicator shown in Figure 4.The control method of this liquid crystal indicator mainly comprises the steps:
Step S21 resets gamma value by this control system for screen display;
The user calls this screen Control-Menu by the input system of this control system for screen display, thereby enters the adjusting gamma option of establishing in it, resets a gamma value in this gamma range of adjustment.This control system for screen display correspondingly sends control signal and is transferred to this microprocessor.
Step S22 is set at current look-up table and is used for proofreading and correct luma data with shared look-up table 232 by the basic look-up table 231 of this gamma-correction circuit with the gamma value correspondence that resets.
This control signal of this microprocessor analysis, and then control this gamma-correction circuit the basic look-up table 231 of the gamma value correspondence that resets is set at current look-up table with shared look-up table 232, be about to the pairing basic look-up table 231 of gamma value that the user sets and be set at current look-up table with shared look-up table 232.This gamma-correction circuit is searched the correction luma data of original luma data correspondence according to the corresponding relation of current look-up table, and outputs to this display panels and come display image.
Liquid crystal indicator of the present invention also can have other numerous variations design, as: this control system for screen display 12 can also be directly connected to this gamma-correction circuit 13, controls this gamma-correction circuit 13 the basic look-up table 131,231 corresponding with the gamma value of input system input is set at current look-up table.
Claims (7)
1. liquid crystal indicator, it comprises a control system for screen display and a gamma-correction circuit, this control system for screen display comprises that one is used for setting the input system of gamma value, this gamma-correction circuit comprises a look-up table, it is characterized in that: this look-up table comprises a plurality of basic look-up tables and a shared look-up table, the corresponding gamma value of each basic look-up table, store a plurality of first original luma data and a plurality of correction luma data corresponding in each basic look-up table with this first original luma data, should share corresponding all gamma values of look-up table, should share look-up table stores a plurality of second original luma data and a plurality of correction luma data corresponding with this second original luma data were arranged, the first original luma data of this gamma-correction circuit receiving video signals or the second original luma data, and maybe should share to search with the gamma value of this setting in look-up table at basic look-up table according to the gamma value of setting and proofread and correct luma data accordingly, wherein, the GTG value of this first original luma data is greater than a predetermined value, and the GTG value of this second original luma data is less than or equal to this predetermined value.
2. liquid crystal indicator as claimed in claim 1 is characterized in that: this gamma-correction circuit is set at current look-up table with the basic look-up table corresponding with the gamma value of this input system input.
3. liquid crystal indicator as claimed in claim 1 is characterized in that: this predetermined value is 32.
4. liquid crystal indicator as claimed in claim 1 is characterized in that: the basic look-up table that this gamma-correction circuit will be corresponding with the gamma value of this input system input and this are shared look-up table and be set at current look-up table.
5. liquid crystal display device control method, it comprises the steps: to provide a liquid crystal indicator, it comprises a control system for screen display and a gamma-correction circuit, this control system for screen display comprises that one is used for setting the input system of gamma value, this gamma-correction circuit comprises a look-up table, this look-up table comprises a plurality of basic look-up tables and a shared look-up table, the corresponding gamma value of each basic look-up table, store a plurality of first original luma data and a plurality of correction luma data corresponding in each basic look-up table with this first original luma data, should share corresponding all gamma values of look-up table, this shared look-up table stores has a plurality of second original luma data and a plurality of correction luma data corresponding with this second original luma data; Input system by this control system for screen display resets gamma value; The first original luma data or the second original luma data by this gamma-correction circuit receiving video signals, and maybe should share to search with the gamma value of this setting in look-up table at basic look-up table according to the gamma value of setting and proofread and correct luma data accordingly, wherein, the GTG value of this first original luma data is greater than a predetermined value, and the GTG value of this second original luma data is less than or equal to this predetermined value.
6. liquid crystal display device control method as claimed in claim 5 is characterized in that: this liquid crystal display device control method further comprises a step: by this gamma-correction circuit the basic look-up table corresponding with the gamma value of this input system input is set at current look-up table.
7. liquid crystal display device control method as claimed in claim 5 is characterized in that: this predetermined value is 32.
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| CN200810067423XA CN101587686B (en) | 2008-05-23 | 2008-05-23 | Liquid crystal display (LCD) device and control method thereof |
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| CN200810067423XA CN101587686B (en) | 2008-05-23 | 2008-05-23 | Liquid crystal display (LCD) device and control method thereof |
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| CN101976552A (en) * | 2010-11-03 | 2011-02-16 | 中航华东光电有限公司 | Method for gamma correction of LCD (Liquid Crystal Display) screen |
| CN107249070A (en) * | 2017-04-21 | 2017-10-13 | 努比亚技术有限公司 | A kind of terminal and gamma adjusting method |
| KR102535803B1 (en) * | 2018-08-13 | 2023-05-24 | 삼성디스플레이 주식회사 | Display device performing unevenness correction and method of operating the display device |
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| CN1499472A (en) * | 2002-11-05 | 2004-05-26 | 奇景光电股份有限公司 | Gamma correcting device for liquid crystal display and LCD for device |
| US6795091B2 (en) * | 2001-02-28 | 2004-09-21 | Samsung Electronics Co., Ltd. | Display apparatus and method for gamma correcting a video signal therein |
| CN1758319A (en) * | 2004-10-08 | 2006-04-12 | 精工爱普生株式会社 | Gamma correction circuit, display drivers, electro-optical devices, and electronic equipment |
| CN1845232A (en) * | 2005-04-08 | 2006-10-11 | 浙江大学 | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature |
| CN101105916A (en) * | 2007-08-10 | 2008-01-16 | 东莞黄江达裕科技电子厂 | GAMMA curve regulation method and device |
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| US6795091B2 (en) * | 2001-02-28 | 2004-09-21 | Samsung Electronics Co., Ltd. | Display apparatus and method for gamma correcting a video signal therein |
| CN1499472A (en) * | 2002-11-05 | 2004-05-26 | 奇景光电股份有限公司 | Gamma correcting device for liquid crystal display and LCD for device |
| CN1758319A (en) * | 2004-10-08 | 2006-04-12 | 精工爱普生株式会社 | Gamma correction circuit, display drivers, electro-optical devices, and electronic equipment |
| CN1845232A (en) * | 2005-04-08 | 2006-10-11 | 浙江大学 | Automatic measurement and correction method and system for LCD GAMMA curve and color temperature |
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Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: INNOLUX DISPLAY CORPORATION |
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Effective date of registration: 20111021 Address after: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant after: Chimei Optoelectronics Co., Ltd. Address before: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant before: Innolux Display Group |
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