CN102708837B - Brightness compensation device and brightness compensation method - Google Patents
Brightness compensation device and brightness compensation method Download PDFInfo
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- CN102708837B CN102708837B CN201210195663.4A CN201210195663A CN102708837B CN 102708837 B CN102708837 B CN 102708837B CN 201210195663 A CN201210195663 A CN 201210195663A CN 102708837 B CN102708837 B CN 102708837B
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Abstract
The invention discloses a brightness compensation device and a brightness compensation method. In order to solve the problem that the brightness of a display decays due to ageing, an accumulated value of color brightness of each point can be stored by using a non-volatile memory such as a flash memory, and then the decayed brightness of each point is compensated. However, if a data error occurs or power temporarily fails when data are written into the non-volatile memory, the error exists forever, and the brightness of the display is led to be uneven. Therefore, in the brightness compensation method, a multiple data backup method, a cyclic redundancy check (CRC) error detection method plus an old-new data comparison method are adopted to protect the data of the non-volatile memory, so as to enable the non-volatile memory to provide correct brightness compensation values and enable the brightness of the display to be even.
Description
Technical field
The present invention relates to a kind of compensation system and method, in particular to a kind of compensation system and luminance compensation method of display brightness.
Background technology
Display (for example FED fluorescence display) can make brightness dimmed because of aging after using a period of time, and because the asynchronism(-nization) that each color of each point is lighted, their aging degree also can be different, in order to maintain picture brightness and color is even, must go compensate for brightness for the color of every bit.
A traditional display system 10 as shown in Figure 1, the cumulative use of these brightness is recorded the namely output of computing unit 104 and can first be deposited in this display system 10 volatile storage 101 (as DRAM) faster, sequentially give again drive IC 102, but once shutdown, these records are just vanished from sight, so the output of computing unit 104 will regularly deposit non-volatility memorizer 103 in as in flash memory, to again grab back data in volatile storage 101 after start.In the time that data write non-volatility memorizer 103, because required time is longer, if run into unexpected shutdown or extraneous interference, just can produce mistake or incomplete data in non-volatility memorizer 103, and these wrong data can be added to original brightness data, produce permanent mistake, this result causing at picture is exactly each point brightness and irregular colour.
Therefore, the present inventor works out a kind of compensation system and application process thereof, and in particular to a kind of compensation system and application process thereof of display brightness, it can improve the present situation of display picture brightness and irregular colour in known technology.
Summary of the invention
An object of the present invention is, on compensation one display in each pixel intensity, the brightness that makes this display evenly and improve the present situation of brightness and irregular colour.
Another object of the present invention is to, on compensation one display, in each pixel intensity, determine that the luminance compensation value that writes the non-volatility memorizer in this display is for correct, and when incorrect, adopt luminance compensation value old in this display.
The present invention is about a kind of luminance compensating mechanism, and to drive a display, it comprises with a drive integrated circult co-operation: a volatile storage, is used for storing each colour brightness accumulated value of each point on this display; One non-volatility memorizer, is used for preventing that the rear described volatile storage colour brightness accumulated value of shutdown from disappearing; And a calculation element, be used for each colour brightness value of cumulative described each point; Wherein, between this calculation element and this non-volatility memorizer, further comprise a detector, in order to the colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer that check that this calculation element is exported, if correct, allow colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer that this calculation element is exported to be write respectively this non-volatility memorizer and this volatile storage, make the brightness of this display even.
The present invention, further about a kind of luminance compensation method, makes the colour brightness accumulated value in a luminance compensating mechanism have consistance, and this luminance compensating mechanism and a drive integrated circult operate jointly to drive a display, and the method comprises:
(a) non-volatility memorizer in this luminance compensating mechanism is at least divided to the second area of more than a first area and
1～n(n is natural number), wherein, this first area stores the higher bit of this colour brightness accumulated value or this colour brightness accumulated value, and this second area stores the low bit of this colour brightness accumulated value;
(b) higher bit of this colour brightness accumulated value or complete bit are write to this first area;
(c) the low bit of this colour brightness accumulated value is write to this second area;
(d) judge the whether normal operation of this display, if normal operation, execution step (b) or step (c); If not, wait for that this display starts shooting again;
(e) in the time that this display is started shooting again, i.e. this second area from last writing area
jthe low bit of (j is the integer between 1～n) this colour brightness accumulated value that reads back, and higher bit or the complete bit of this colour brightness accumulated value that reads back from this first area;
(f) judge that whether this low bit is wrong; And
If wrong, from this second area
j-1in the read back low bit of this colour brightness accumulated value.
For making those skilled in the art have further understanding and approval for structure object of the present invention and effect, hereby coordinate accompanying drawing example to be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the luminance compensating mechanism schematic diagram of prior art;
Fig. 2 is the schematic diagram for luminance compensating mechanism of the present invention;
Fig. 2 A is another schematic diagram for luminance compensating mechanism of the present invention;
Fig. 3 is that the Region Segmentation of non-volatility memorizer is corresponding to the schematic diagram of the relation of the data before and after cumulative and high/low bit and partial data;
Fig. 4 is another schematic diagram for the region allocation of non-volatility memorizer of the present invention; And
Fig. 5 is for method preferred embodiment of the present invention.
Wherein, Reference numeral
Embodiment
In a preferred embodiment of the present invention, described non-volatility memorizer is as being divided into some regions in flash memory, in region, each block (sector) is filled in data error-detecging code (as CRC character), in the time of sense data, if when the error-detecging code of calculating gained is different with the error-detecging code originally depositing in, just the data that represent this block are wrong, and the corresponding Backup Data that at this moment can read back replaces wrong block.
As shown in Figure 2, the output of computing unit 104 and non-volatility memorizer 103 are as between flash memory, further increase by a detector 201, whether this detector 201 can be used for writing and reading back of data check code, also can be correct according to the new data of the legacy data differentiation read/write non-volatility memorizer 103 for differentiating read/write non-volatility memorizer 103.Furtherly, this detector 201 can be used for the colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer 103 that check that this computing unit 104 is exported, if correct, allow colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer that this calculation element is exported to be write respectively this non-volatility memorizer and this volatile storage, make the brightness of display even.
This detector 201 also can be divided into one first detector 201a and one second detector 201b, it is respectively used to writing and reading back of data check code, and whether correct for differentiating the legacy data of read/write non-volatility memorizer 103 if differentiating the new data of read/write non-volatility memorizer 103.The now output of this computing unit 104 through this first detector 201a and the second detector 201b to this non-volatility memorizer 103, as Fig. 2 A.
Preferably, this data check code can be CRC code.
Preferably, the criterion of this detector 201 can be differentiated according to following equation, as Y-X < K; Wherein Y will write the new colour brightness accumulated value of this non-volatility memorizer, and X is original colour brightness accumulated value in this non-volatility memorizer, and K is the maximum difference of adjacent twice colour brightness accumulated value in a special time.Or as Y < X.
Therefore,, when differentiating when wrong to original colour brightness accumulated value in wrong this non-volatility memorizer 103 that does not write this non-volatility memorizer 103 and read of new colour brightness accumulated value, use Backup Data corresponding to original colour brightness accumulated value.
If but Backup Data is wrong again, What then? so repeatedly backup can be more safer than one-time backup, but storage data is carried out in the space that cost is more times of non-volatility memorizer 103 use.
For saving the space of non-volatility memorizer 103, in another preferred embodiment of the present invention, Fig. 3 further illustrates the Region Segmentation of non-volatility memorizer 103 corresponding to the data before and after cumulative and the relation of high/low bit and partial data thereof.
Region A stores partial data or the higher bit data of whole picture brightness compensation, region C
1～ionly deposit low Bit data (i is integer, is 7 in the present embodiment), take Fig. 3 as example, have 8 regions and store in turn the data of renewal, so not only can increase the indegree of writing of flash memory, also have the repeatedly function of backup.For example,, when from region C
7the data wrong (as CRC error) of reading back, can grab region C
6data reply, although the data of adjacent area incomplete same, difference is little, can not cause notable difference to the brightness of display and color.If region C
6data also wrong, just can grab region C
5data reply, by that analogy.
Wherein to this flash memory, and this C of the capacity of this region A
1～iaverage size be large.
But such region allocation mode still has a problem, because the data of low bit regions must calmodulin binding domain CaM A higher bit data be only real data, just cannot reply if region A higher bit data are wrong, solution is the data that increase another region B backs up region A, as Fig. 4.
While writing a region, can the Counter Value of writing indegree be write, to can judge which region is the data of final updating be in while again starting shooting at every turn simultaneously? so the program after start can be expressed as follows:
(1) region that judgement finally writes, supposes it is region C
i;
(2) read in region C simultaneously
iwith the data of region A, and judge that whether data are wrong, if the data in two regions are all correct, obtain partial data in conjunction with low Bit data and higher bit data;
(3) if region C
iread in wrongly, read in region C
i-1if, the wrong region C that reads in again
i-2, the rest may be inferred; If a-quadrant data are wrong, read in the data of region B.Finally obtain partial data in conjunction with low Bit data and higher bit data again.
Fig. 5 further illustrates another preferred embodiment of the present invention, it is about a kind of consistent wiring method of reading of colour brightness accumulated value making in a luminance compensating mechanism, this luminance compensating mechanism and a drive integrated circult operate jointly to drive a display, and the method comprises:
S501: the non-volatility memorizer in this luminance compensating mechanism is at least divided to the second area 1～n (n is natural number) of more than a first area and, wherein, this first area stores the higher bit of this colour brightness accumulated value or this colour brightness accumulated value, and this second area stores the low bit of this colour brightness accumulated value;
S502: the higher bit of this colour brightness accumulated value or complete bit are write to this first area;
S503: the low bit of this colour brightness accumulated value is write to this second area;
S504: judge the whether normal operation of this display, if normal operation, execution step s502 or s503; If not, wait for that this display starts shooting again;
S505: in the time that this display is started shooting again, i.e. this second area from last writing area
jthe low bit of (j is the integer between 1～n) this colour brightness accumulated value that reads back, and higher bit or the complete bit of this colour brightness accumulated value that reads back from this first area;
S506: judge that whether this low bit is wrong; And
S507: if wrong, from this second area
j-1in the read back low bit of this colour brightness accumulated value.
Preferably, wherein this step s501 further by this non-volatility memorizer one the 3rd regions of dividing more, and wherein the 3rd region is as the backup of this first area.
Preferably, the method in Fig. 5, it further comprises:
S508: whether the higher bit that judges this colour brightness accumulated value that this first area is stored or this colour brightness accumulated value is wrong; And
S509: if wrong, the higher bit of read back from the 3rd region this colour brightness accumulated value or this colour brightness accumulated value.
Preferably, described each region has the block (sector) of more than.
Preferably, described multiple block all has an error-detecting code as CRC code.
Preferably, described second area further has a carry dummy bit.
Preferably, described non-volatility memorizer is a flash memory.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (6)
1. a luminance compensation method, makes the colour brightness accumulated value in a luminance compensating mechanism have consistance, and this luminance compensating mechanism and a drive integrated circult operate jointly to drive a display, it is characterized in that, the method comprises the following steps:
(a) non-volatility memorizer in this luminance compensating mechanism is at least divided to the second area of more than a first area and
1～n, n is natural number, and wherein, this first area stores the higher bit of complete bit or this colour brightness accumulated value of this colour brightness accumulated value, and this second area stores the low bit of this colour brightness accumulated value; Described second area has multiple blocks, and described multiple block all has an error-detecting code;
(b) higher bit of this colour brightness accumulated value or complete bit are write to this first area;
(c) the low bit of this colour brightness accumulated value is write to this second area;
(d) judge the whether normal operation of this display, if normal operation, execution step (b) or step (c); If not, wait for that this display starts shooting again;
(e) in the time that this display is started shooting again, be second area from last writing area
j, j is the integer between 1～n, the low bit of this colour brightness accumulated value that reads back, and higher bit or the complete bit of this colour brightness accumulated value that reads back from this first area;
(f) judge that whether this low bit is wrong; And
(g) if wrong, from this second area
j-1in the read back low bit of this colour brightness accumulated value.
2. method according to claim 1, is characterized in that, this step (a) further by this non-volatility memorizer one the 3rd regions of dividing more, and wherein the 3rd region is as the backup of this first area.
3. method according to claim 2, is characterized in that, it further comprises:
(h) judge that whether the complete bit of this stored colour brightness accumulated value of this first area or the higher bit of this colour brightness accumulated value be wrong; And
(i) if wrong, the higher bit of complete bit or this colour brightness accumulated value of this colour brightness accumulated value that reads back from the 3rd region.
4. method according to claim 1, is characterized in that, described error-detecting code is a CRC code.
5. method according to claim 1, is characterized in that, described second area further has a carry dummy bit.
6. method according to claim 1, is characterized in that, described non-volatility memorizer is a flash memory.
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| CN201210195663.4A CN102708837B (en) | 2009-09-29 | 2009-09-29 | Brightness compensation device and brightness compensation method |
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| KR102556275B1 (en) * | 2015-08-19 | 2023-07-18 | 밸브 코포레이션 | Systems and methods for detecting and/or correcting changes in pixel luminance and/or chrominance response of displays |
| CN105895056B (en) | 2016-06-17 | 2017-04-19 | 京东方科技集团股份有限公司 | Method for establishing luminance compensation model and screen luminance compensation method and screen luminance compensation device |
Citations (4)
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| CN1851827A (en) * | 2006-06-02 | 2006-10-25 | 北京中星微电子有限公司 | Flash storage data access method |
| CN101192384A (en) * | 2006-12-01 | 2008-06-04 | 群康科技(深圳)有限公司 | LCD device gamma correction table creation method |
| CN101377919A (en) * | 2007-08-28 | 2009-03-04 | 晨星半导体股份有限公司 | Gamma correction device |
| EP2077502A1 (en) * | 2006-10-27 | 2009-07-08 | Fujitsu Limited | Address line fault treating apparatus, address line fault treating method, address line fault treating program, information processing apparatus and memory controller |
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| JP2004157526A (en) * | 2002-10-15 | 2004-06-03 | Nec Electronics Corp | Controller-driver, display device, and display method |
| JP2007533060A (en) * | 2004-04-14 | 2007-11-15 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Data processing device for correcting errors in data memory |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851827A (en) * | 2006-06-02 | 2006-10-25 | 北京中星微电子有限公司 | Flash storage data access method |
| EP2077502A1 (en) * | 2006-10-27 | 2009-07-08 | Fujitsu Limited | Address line fault treating apparatus, address line fault treating method, address line fault treating program, information processing apparatus and memory controller |
| CN101192384A (en) * | 2006-12-01 | 2008-06-04 | 群康科技(深圳)有限公司 | LCD device gamma correction table creation method |
| CN101377919A (en) * | 2007-08-28 | 2009-03-04 | 晨星半导体股份有限公司 | Gamma correction device |
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| JP特表2007-533060A 2007.11.15 |
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