CN101329842A - Liquid crystal display capable of correcting GAMA of display screen and method for making the same - Google Patents
Liquid crystal display capable of correcting GAMA of display screen and method for making the same Download PDFInfo
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- CN101329842A CN101329842A CNA2007100751706A CN200710075170A CN101329842A CN 101329842 A CN101329842 A CN 101329842A CN A2007100751706 A CNA2007100751706 A CN A2007100751706A CN 200710075170 A CN200710075170 A CN 200710075170A CN 101329842 A CN101329842 A CN 101329842A
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Abstract
The invention discloses an LCD which can support GAMA correction to a plurality of display screens and a preparation method thereof. The LCD which can support GAMA correction to a plurality of display screens comprises: a memory applied to storing GAMA data and carrying out GAMA correction to the display screens, wherein, the memory is stored with at least two groups of GAMA data corresponding to different display screens. As the memory of the LCD is stored with at least two groups of GAMA data corresponding to different display screens, no software needs to be replaced during production test or during maintenance and replacement of the display screens, and the display can directly call other GAMA stored data and support GAMA correction to different display screens. The application is very convenient.
Description
Technical field
The present invention relates to a kind of LCD, in particular, relate to a kind of LCD that can carry out the GAMA correction to the chromatic distortion of display and preparation method thereof.
Background technology
In television system, red, green, blue (RGB) is three primary colours, and the transmission of signal and conversion are all undertaken by these three kinds of colors.Because non-linear in the transmission course, there is luminance distortion in the colour of reproduction, also has chromatic distortion.So must carry out the correction of GAMA to these three primary colours, to guarantee that final colour and the original colour that shows is the relation of a linearity.
Development along with television technologies, LCD TV becomes the main force's product on the market gradually, but the manufacturer of liquid crystal display is numerous, the technology that is adopted also has nothing in common with each other, the parameter of display screen just has very big difference, GAMA curve particularly, TV manufacturer need need special GAMA to proofread and correct at every kind of display screen, otherwise problems such as colour cast can appear in the image that shows.
Proofread and correct for the chromatic distortion to display screen carries out GAMA, general way all is to test at every kind of display screen, obtains one group of GAMA data, writes code then or be kept at outside storer to carry out calling of data.This method is to but underaction of the support of multiple display screen.We need to change different display screens when LCD is carried out pilot production or maintenance, the display screen of a different parameters of every replacing is proofreaied and correct new display screen is carried out GAMA with regard to needing to change corresponding software again, wastes time and energy.Existing display all can not be supported multiple display screen.
Summary of the invention
For overcoming above-mentioned defective, technical matters to be solved by this invention provides a kind of LCD that GAMA proofreaies and correct and preparation method thereof of can supporting multiple display screen carried out.
The objective of the invention is to be achieved through the following technical solutions:
A kind of LCD that can carry out the GAMA correction to display screen comprises: be used to store the GAMA data display screen is carried out the storer that GAMA proofreaies and correct, wherein: the GAMA data that store the corresponding different display screens of at least two groups in the described storer.
Described GAMA data are the compression GAMA data after the data compressing module compression.Such design can utilize finite storage space, stores more groups GAMA data.
The GAMA data of storing in the described storer are three groups.This situation is particularly useful for RLE (Run-Length Encoding run length encoding) compression algorithm, after using the RLE compression algorithm that the GAMA data are carried out data compression, data space only accounts for 1/3rd of former space, just can be under the situation that does not increase storage space, store three groups of GAMA data, adapt to three kinds of different display screens.
Described LCD is provided with the selection display module that corresponds respectively to different GAMA data in its factory's menu.Factory's menu is that open to a user interface of using is debugged in the manufacturer inside that present a lot of electronic product all has, when producing the display screen that needs the replacing equal resolution, can select the GAMA parameter of corresponding display screen by the menu options of described selection display module, directly enter and carry out artificial debugging in factory's menu, improved the efficient of producing.
A kind of method for making that can carry out the LCD of GAMA correction to display screen comprises GAMA data storage procedure and GAMA data call process, it is characterized in that:
Described GAMA data storage procedure may further comprise the steps:
A: two groups or more GAMA data that obtain two or more display screens respectively;
B: this two groups or more GAMA data are stored into respectively in the storer of LCD by (code or be kept in the external memory storage);
Described GAMA data call process may further comprise the steps:
C: select one group of GAMA data with the display screen coupling;
D: call the video frequency processing chip that the GAMA data write LCD, carry out GAMA and proofread and correct.
Also comprise the step that above-mentioned GAMA data are compressed after the described steps A; Corresponding, also comprise a step that the GAMA data of compression are decompressed behind the described step C.
Use RLE run-length encoding algorithm that the GAMA The data is compressed in the described compression step; Accordingly, the GAMA data of storing in the described storer are three groups.
Among the described step D,, select one group of GAMA data corresponding and the display screen coupling by the selection display module that corresponds respectively to different GAMA data that in factory's menu, is provided with.
The present invention is owing to store the GAMA data of two groups or more corresponding different display screens in the storer of LCD, thereby when pilot production or maintain and replace liquid crystal display, do not need to change software, can directly call other GAMA data of storage, can support that different LCDs is carried out GAMA proofreaies and correct, easy to use.
Description of drawings
Fig. 1 is the GAMA curve of a kind of liquid crystal display in the embodiment of the invention;
Fig. 2 is the process flow diagram of the method for making of the embodiment of the invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.
The display screen of LCD often carries out the GAMA correction by the GAMA data that are stored in the storer with the color to display screen, problems such as colour cast occur with the image of avoiding its demonstration.By testing at every kind of display screen, obtain the GAMA data of different display screens, then with this polycomponent not the GAMA data of corresponding different display screens be kept in the storer (promptly write code or be kept in the outside storer) so that call in that display screen is carried out the GAMA timing.So just can when pilot production or maintain and replace liquid crystal display, not need to change software, can directly call other GAMA data of storage, can support that different LCDs is carried out GAMA proofreaies and correct, easy to use.
Fig. 2 shows the method flow that making can be carried out the LCD of GAMA correction to display screen: make the above-mentioned LCD that can carry out the GAMA correction to multiple display screen, to obtain the GAMA curve of two or more display screens earlier respectively, and quantize to obtain its corresponding GAMA data.
Fig. 1 shows a kind of GAMA calibration curve of display screen: the GAMA calibration curve generally is a nonlinear curve, adopts 8bit or 10bit to quantize just to obtain one group of GAMA data.The quantification of GAMA curve is exactly: carry out the sampling of horizontal ordinate earlier, for example horizontal ordinate length is 256, per two point samplings once, obtain 128 points altogether, equally, corresponding each horizontal ordinate point has an ordinate value on response curve, and this value need be according to the number of bits that quantizes, changing into the value of quantification, equally also is 128 points.The quantification of 8bit or 10bit, if the data owner precision that obtains is different, the exponent number that quantizes when 8bit quantizes has only 256 rank, 10bit then has 1024 rank when quantizing, so just can better show original curve, and to the compression of data less than changing, specifically be to adopt 8bit or 10bit need to quantize the support of chip.
GAMA curve at shown in Figure 1 is quantified as example with 8bit, can obtain three groups of original GAMA data of RGB, uses three array representations respectively, and wherein, the data array of green (G) curve is: G[]=
{0x00，0x01，0x02，//G 1
0x00，0xc1，0x02，//G 2
0x01，0x83，0x02，//G 3
0x02，0xc2，0x03，//G 4
0x04，0x02，0x02，//G 5
0x05，0x03，0x03，//G 6
0x06，0x82，0x03，//G 7
0x07，0xc3，0x02，//G 8
0x09，0x03，0x03，//G 9
0x0a，0x83，0x03，//G?10
0x0c，0x02，0x03，//G?11
0x0d，0x43，0x03，//G?12
0x0e，0xc3，0x03，//G?13
0x10，0x43，0x04，//G?14
0x12，0x03，0x03，//G?15
0x13，0x83，0x03，//G?16
0x15，0x03，0x03，//G?17
0x16，0x84，0x03，//G?18
0x18，0x43，0x03，//G?19
0x19，0xc4，0x03，//G?20
0x1b，0x83，0x04，//G?21
0x1d，0x43，0x03，//G?22
0x1e，0xc4，0x03，//G?23
0x20，0x84，0x03，//G?24
0x22，0x43，0x04，//G?25
0x24，0x03，0x04，//G?26
0x25，0xc3，0x04，//G?27
0x27，0x83，0x04，//G?28
0x29，0x43，0x04，//G?29
0x2b，0x04，0x03，//G?30
0x2c，0xc4，0x03，//G?31
0x2e，0x84，0x04，//G?32
0x30，0x83，0x04，//G?33
0x32，0x44，0x03，//G?34
0x34，0x04，0x04，//G 35
0x36，0x03，0x04，//G 36
0x37，0xc4，0x04，//G 37
0x39，0xc3，0x04，//G 38
0x3b，0x84，0x04，//G 39
0x3d，0x83，0x04，//G 40
0x3f，0x44，0x04，//G 41
0x41，0x44，0x04，//G 42
0x43，0x43，0x04，//G 43
0x45，0x04，0x04，//G 44
0x47，0x04，0x04，//G 45
0x49，0x04，0x04，//G 46
0x4b，0x04，0x03，//G 47
0x4c，0xc4，0x04，//G 48
0x4e，0xc4，0x04，//G 49
0x50，0xc4，0x04，//G 50
0x52，0xc4，0x04，//G 51
0x54，0xc4，0x04，//G 52
0x56，0xc4，0x04，//G 53
0x58，0xc4，0x04，//G 54
0x5a，0xc4，0x04，//G 55
0x5c，0xc4，0x05，//G 56
0x5f，0x04，0x04，//G 57
0x61，0x04，0x04，//G 58
0x63，0x04，0x04，//G 59
0x65，0x04，0x04，//G 60
0x67，0x04，0x05，//G 61
0x69，0x44，0x04，//G 62
0x6b，0x44，0x04，//G 63
0x6d，0x44，0x05，//G 64
0x6f，0x84，0x04，//G 65
0x71，0x84，0x04，//G 66
0x73，0x85，0x04，//G 67
0x75，0xc4，0x04，//G 68
0x77，0xc4，0x05，//G 69
0x7a，0x04，0x04，//G 70
0x7c，0x04，0x05，//G 71
0x7e，0x44，0x04，//G 72
0x80，0x45，0x04，//G 73
0x82，0x84，0x04，//G 74
0x84，0x85，0x04，//G 75
0x86，0xc4，0x05，//G 76
0x89，0x04，0x04，//G 77
0x8b，0x05，0x04，//G 78
0x8d，0x44，0x05，//G 79
0x8f，0x84，0x05，//G 80
0x91，0xc4，0x04，//G 81
0x93，0xc5，0x04，//G 82
0x96，0x04，0x05，//G 83
0x98，0x44，0x05，//G 84
0x9a，0x84，0x05，//G 85
0x9c，0xc4，0x04，//G 86
0x9e，0xc5，0x04，//G 87
0xa1，0x05，0x04，//G 88
0xa3，0x45，0x04，//G 89
0xa5，0x85，0x04，//G 90
0xa7，0xc5，0x04，//G 91
0xaa，0x05，0x04，//G 92
0xac，0x44，0x05，//G 93
0xae，0x85，0x04，//G 94
0xb0，0xc5，0x04，//G 95
0xb3，0x05，0x04，//G 96
0xb5，0x45，0x04，//G 97
0xb7，0x85，0x04，//G 98
0xb9，0xc5，0x04，//G 99
0xbc，0x05，0x05，//G?100
0xbe，0x84，0x05，//G?101
0xc0，0xc4，0x05，//G?102
0xc3，0x04，0x05，//G?103
0xc5，0x45，0x04，//G?104
0xc7，0x85，0x05，//G?105
0xca，0x04，0x05，//G?106
0xcc，0x44，0x05，//G?107
0xce，0x85，0x04，//G?108
0xd0，0xc5，0x05，//G?109
0xd3，0x44，0x05，//G?110
0xd5，0x85，0x04，//G?111
0xd7，0xc5，0x05，//G?112
0xda，0x44，0x05，//G?113
0xdc，0x85，0x04，//G?114
0xde，0xc5，0x05，//G?115
0xe1，0x44，0x05，//G?116
0xe3，0x85，0x05，//G?117
0xe6，0x04，0x05，//G?118
0xe8，0x45，0x04，//G?119
0xea，0x85，0x05，//G?120
0xed，0x05，0x04，//G?121
0xef，0x45，0x05，//G?122
0xf1，0xc5，0x04，//G?123
0xf4，0x05，0x05，//G?124
0xf6，0x85，0x05，//G?125
0xf9，0x04，0x05，//G?126
0xfb，0x45，0x05，//G?127
0xfd，0xc5，0x00，//G?128
}
The data array B mouth of the data array R mouth of other redness (R) curve and blueness (B) curve and green (G) are though the data array G mouth data of curve are different, but structure is the same, every group data all are 128*3, three groups data total amount is 1152, if directly preserve the space that just need take about 1K BYTE.
By three groups of data of above-mentioned original RGB are carried out compression algorithm respectively, what present embodiment used is general RLE run-length encoding compression algorithm, and still the data array G mouth with green (G) curve is an example, by the GAMA data array after the compression of RLE run-length encoding is:
GAMA_G[]＝
{
0x00，0x01，0x97，0x99，0x78，0x97，0x89，0x87，0x98，0x79，
0x88，0x87，0x98，0x88，0x88，0x97，0x88，0x88，0x89，0x78，
0x89，0x78，0x97，0x89，0x79，0x78，0x97，0x97，0x97，0x97，
0x98，0x79，0x79，0x87，0x98，0x79，0x87，0x98，0x87，0x98，
0x87，0x98，0x88，0x87，0x98，0x88，0x88，0x88，0x79，0x88，
0x88，0x88，0x88，0x88，0x88，0x88，0x88，0x97，0x88，0x88，
0x88，0x88，0x97，0x88，0x88，0x97，0x88，0x89，0x78，0x88，
0x97，0x88，0x97，0x89，0x78，0x89，0x78，0x97，0x89，0x78，
0x97，0x97，0x89，0x78，0x97，0x97，0x97，0x89，0x79，0x79，
0x79，0x79，0x79，0x78，0x98，0x79，0x79，0x79，0x79，0x79，
0x79，0x87，0x97，0x97，0x98，0x79，0x87，0x97，0x98，0x79，
0x87，0x98，0x79，0x87，0x98，0x79，0x87，0x98，0x87，0x98，
0x79，0x88，0x79，0x88，0x79，0x88，0x87，0x98，0x88，
}
Data after the compression have only 129, and it is original 1/3rd that data volume has only, and reduced storage space greatly.
Same, can gather the GAMA data of a plurality of dissimilar displays and quantize and compression.Like this, preserve the space of one group of original GAMA data originally, just can preserve three kinds of GAMA data after the different compressions.That is to say on identical space, under the prerequisite that does not change former memory capacity, can preserve the GAMA data of three kinds of different display screens, support three kinds of liquid crystal displays are compatible.Certainly, can also realize the GAMA data are compressed, as huffman coding compression algorithm etc. by other lossless compression algorithm.
Here three kinds of GAMA data of the preservation of saying, just owing to the GAMA data that produce at us, after adopting RLE run-length encoding algorithm to compress, its compressibility is 1/3rd, be data volume after its compression when not compressing 1/3rd, in order not expand the storage space of LCD, do not increase cost in addition, original storage space can be preserved three groups of different GAMA data, in order to support more eurypalynous display screen, the group number of GAMA data is not limited to three groups, can be by expanding storage space, or the optimization compression algorithm, the mode that improves compressibility realizes.
After the GAMA data of the multiple display screen that need to have obtained, the many groups GAMA data storage that obtains (can be write in the code, or is kept in the external memory storage) in the storer of LCD.
According to the display screen that LCD is installed, from the GAMA data of preserving, select one group of GAMA data with the display screen coupling.GAMA data after the compression are when calling, then needing decompresses obtains original GAMA data, and promptly the data that quantize according to the GAMA curve write in the middle of the corresponding display chip of LCD then, carry out GAMA and proofread and correct, LCD just problem such as colour cast can not occur.On software, can adopt a function to realize decompression algorithm, the suction parameter of function is exactly the GAMA data array after the compression.
Above-mentioned LCD is being carried out pilot production or maintenance, when needing to change liquid crystal display, selection for the GAMA data of better carrying out different display screens, the selection display module that corresponds respectively to different GAMA data can be set in factory's menu of televisor, by selecting display module to select to call not on the same group GAMA data, to adapt to different display screens.Factory's menu of TV mainly is for producing debugging and maintenance use, because the TV the inside has many parameters to need to be provided with, and these parameters can not be open to the user, so need when dispatching from the factory, adjust parameter, factory's menu is exactly for an interface that produces the commissioning staff, can use some special instructions, by some necessary parameter of factory's menu setting.In factory's menu, increase a selection display module that corresponds respectively to different GAMA data, just can directly select different GAMA data.
The benefit of doing like this is exactly the display screen that needs to change equal resolution when producing, and can enter to carry out artificial debugging in factory's menu when producing, and has improved the efficient of producing.Automatic adjusting matching module also can be set, and according to the parameter attribute of display screen, the GAMA data of match selection correspondence are more convenient to use automatically.Certainly, if the selection display module that corresponds respectively to different GAMA data is not set in factory's menu, also can debug, but this method needs the support of some debugging acids by the built-in many groups GAMA data of the GAMA parameter testing facility invokes of external serial ports.
Display screen for different resolution, because its display parameter have very big difference, support the GAMA of different display screens to proofread and correct, not only need corresponding GAMA data, also need to adjust display parameter, need also include the display parameter of corresponding display screen.As long as other display parameter of display screen also can be comprised many groups,, also be the display screen that to support multiple different resolution though need bigger storage space.
And if do not compress the GAMA data, only increase external memory space, also be the purpose that can realize compatible multiple display screen, need to increase the cost of storer like this.Certainly,, can preserve abundant GAMA data, to support more eurypalynous display screen if the space is enough.
Because we at first obtain one group of original GAMA data at every kind of display screen, a large amount of GAMA data are carried out compression algorithm reduce data volume, just data are stored then, write code or be kept in the external memory storage.
Can preserve the GAMA data of multiple display screen like this and can in factory mode, carry out the selection of the GAMA data of every kind of display screen, during routine call GAMA data data be decompressed in real time, write then in the corresponding display chip at televisor.This method realizes simple, can effectively reduce the memory space of data, and the optimizer code has improved the adaptability to different display screens, also can effectively enhance productivity simultaneously.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1, a kind of LCD that can carry out the GAMA correction to display screen, comprise: be used to store the GAMA data display screen is carried out the storer that GAMA proofreaies and correct, it is characterized in that: the GAMA data that store the corresponding different display screens of at least two groups in the described storer.
2, a kind of LCD that can carry out the GAMA correction to display screen as claimed in claim 1, it is characterized in that: described GAMA data are the compression GAMA data after the data compressing module compression.
3, a kind of LCD that can carry out the GAMA correction to display screen as claimed in claim 2, it is characterized in that: the GAMA data of storing in the described storer are three groups.
4, a kind of LCD that can carry out the GAMA correction to display screen as claimed in claim 1, it is characterized in that: described LCD is provided with the selection display module that corresponds respectively to different GAMA data in its factory's menu.
5, a kind of method for making that can carry out the LCD of GAMA correction to display screen as claimed in claim 1 comprises GAMA data storage procedure and GAMA data call process, it is characterized in that:
Described GAMA data storage procedure may further comprise the steps:
A: two groups or more GAMA data that obtain two or more display screens respectively;
B: this two groups or more GAMA data are stored into respectively in the storer of LCD;
Described GAMA data call process may further comprise the steps:
C: select one group of GAMA data with the display screen coupling;
D: call the video frequency processing chip that the GAMA data write LCD, carry out GAMA and proofread and correct.
6, a kind of method for making that can carry out the LCD of GAMA correction to display screen as claimed in claim 5 is characterized in that: also comprise the step that above-mentioned GAMA data are compressed after the described steps A; Corresponding, also comprise a step that the GAMA data of compression are decompressed behind the described step C.
7, a kind of method for making that can carry out the LCD of GAMA correction to display screen as claimed in claim 6, it is characterized in that: in the described compression step GAMA The data RLE run-length encoding algorithm is compressed, the capacity after the compression is 1/3rd of a former capacity; Accordingly, the GAMA data of storing in the described storer are three groups.
8, a kind of method for making that can carry out the LCD of GAMA correction to display screen as claimed in claim 5, it is characterized in that: among the described step D, by the selection display module that corresponds respectively to different GAMA data that in factory's menu, is provided with, select one group of GAMA data corresponding and the display screen coupling.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100751706A CN101329842B (en) | 2007-06-22 | 2007-06-22 | Liquid crystal display capable of correcting GAMA of display screen and method for making the same |
| HK09102443.0A HK1122389A1 (en) | 2007-06-22 | 2009-03-16 | A lcd that can correct the gamma of display and its manufacture method |
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| CN2007100751706A CN101329842B (en) | 2007-06-22 | 2007-06-22 | Liquid crystal display capable of correcting GAMA of display screen and method for making the same |
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| CN101329842B CN101329842B (en) | 2011-06-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107093413A (en) * | 2017-06-29 | 2017-08-25 | 武汉精测电子技术股份有限公司 | A kind of gamma adjusting method of LCD screen |
| CN108028036A (en) * | 2015-09-25 | 2018-05-11 | 索尼公司 | Image processing equipment and image processing method |
| WO2021051305A1 (en) * | 2019-09-18 | 2021-03-25 | Qualcomm Incorporated | Methods and apparatus for calibrating new displays |
| CN112562594A (en) * | 2020-12-25 | 2021-03-26 | 合肥维信诺科技有限公司 | Voltage drop compensation method and device of AMOLED display module |
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| KR100777702B1 (en) * | 2001-06-04 | 2007-11-21 | 삼성전자주식회사 | Flat panel display and driving method thereof |
| JP3675416B2 (en) * | 2002-03-07 | 2005-07-27 | セイコーエプソン株式会社 | Display driver, electro-optical device, and display driver parameter setting method |
| CN100351880C (en) * | 2003-05-13 | 2007-11-28 | 中华映管股份有限公司 | Plasma two-dimensional display with grey scale white balancing device |
| CN100356426C (en) * | 2004-12-17 | 2007-12-19 | 华东师范大学 | Method for controlling multiple resolution plasma display screen driver |
| CN101046939A (en) * | 2006-03-30 | 2007-10-03 | 东杰电气(上海)有限公司 | Configuration method of liquid crystal screen parameter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108028036A (en) * | 2015-09-25 | 2018-05-11 | 索尼公司 | Image processing equipment and image processing method |
| CN107093413A (en) * | 2017-06-29 | 2017-08-25 | 武汉精测电子技术股份有限公司 | A kind of gamma adjusting method of LCD screen |
| CN107093413B (en) * | 2017-06-29 | 2019-10-15 | 武汉精测电子集团股份有限公司 | A kind of gamma adjusting method of LCD screen |
| WO2021051305A1 (en) * | 2019-09-18 | 2021-03-25 | Qualcomm Incorporated | Methods and apparatus for calibrating new displays |
| CN112562594A (en) * | 2020-12-25 | 2021-03-26 | 合肥维信诺科技有限公司 | Voltage drop compensation method and device of AMOLED display module |
| CN112562594B (en) * | 2020-12-25 | 2022-02-08 | 合肥维信诺科技有限公司 | Voltage drop compensation method and device of AMOLED display module |
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| HK1122389A1 (en) | 2009-05-15 |
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