CN102034459B - Brightness compensation device and method - Google Patents
Brightness compensation device and method Download PDFInfo
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- CN102034459B CN102034459B CN200910178596A CN200910178596A CN102034459B CN 102034459 B CN102034459 B CN 102034459B CN 200910178596 A CN200910178596 A CN 200910178596A CN 200910178596 A CN200910178596 A CN 200910178596A CN 102034459 B CN102034459 B CN 102034459B
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Abstract
The invention discloses brightness compensation device and method. In order to avoid the brightness attenuation caused by the aging of a display, a non-volatile memory, such as a flash memory, can be used to store the accumulated value of the color brightness of each point and then compensate the attenuated brightness of each point. However, when data fault or temporary power fault happens during the writing of the non-volatile memory, the fault exists permanently and results in uneven brightness of the display, and therefore, in the invention, the data of the non-volatile memory are protected by adopting a multiple data backup and CRC (Cyclic Redundancy Check) error detection method and an old-new data comparison method to ensure that the right brightness compensation value is supplied to ensure the even brightness of the display.
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) uses and can make the brightness deepening after a period of time because of wearing out; And because the asynchronism(-nization) that each color of each point is lighted; Their aging degree also can be different; In order to keep picture brightness and color even, must go compensate for brightness to the color of every bit.
As shown in Figure 1 one traditional display system 10; The service recorder that these brightness the add up output of computing unit 104 just can deposit in earlier in this display system 10 volatile storage 101 (like DRAM) faster; Give drive IC 102 more in regular turn, in a single day when still shutting down, these records are just vanished from sight; So the output of computing unit 104 will regularly deposit non-volatility memorizer 103 in as in the flash memory, so that grab back data in volatile storage 101 after the start again.When data write non-volatility memorizer 103; Because required time is longer; If run into unexpected shutdown or extraneous interference, just can produce wrong or incomplete data in non-volatility memorizer 103, and these wrong data can be added to original brightness data; Produce nonvolatil mistake, this result who causes at picture is exactly each point brightness and irregular colour.
Therefore, inventor of the present invention 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 the known technology.
Summary of the invention
A purpose of the present invention is, on compensation one display in each pixel intensity, make this display brightness evenly and improve the present situation of brightness and irregular colour.
Another object of the present invention is to, in each pixel intensity, the luminance compensation value of confirming to write the non-volatility memorizer in this display is correct on compensation one display, and when incorrect, prolongs with old luminance compensation value in this display.
The present invention is about a kind of luminance compensating mechanism, with a drive integrated circult co-operation to drive a display, it comprises: 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 said volatile storage colour brightness accumulated value in shutdown back from disappearing; And a calculation element, each colour brightness value of said each point that is used for adding up; Wherein, Further comprise a detector between this calculation element and this non-volatility memorizer; In order to colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer of checking that this calculation element is exported; If correct, the colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer that allow this calculation element to export are write this non-volatility memorizer and this volatile storage respectively, make that the brightness of this display is even.
The present invention makes the colour brightness accumulated value in the luminance compensating mechanism have consistance further about a kind of luminance compensation method, and this luminance compensating mechanism and a drive integrated circult operate together are to drive a display, and this method comprises:
(a) non-volatility memorizer in this luminance compensating mechanism is divided at least more than a first area and one second area
1～n(n is a 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 or the complete bit with this colour brightness accumulated value writes this first area;
(c) the low bit with this colour brightness accumulated value writes this second area;
(d) judge the whether normal operation of this display, if normal operation, execution in step (b) or step (c); If not, wait for that this display starts shooting again;
(e) when this display is started shooting again, from writing i.e. this second area in zone at last
jThe low bit of (j is the integer between 1～n) this colour brightness accumulated value that reads back, and the higher bit or the complete bit of this colour brightness accumulated value that reads back from this first area;
Whether (f) low bit is somebody's turn to do in judgement 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 further understanding and approval arranged for structure purpose of the present invention and effect, now the conjunction with figs. example specify as after.
Description of drawings
Fig. 1 is the luminance compensating mechanism synoptic diagram of prior art;
Fig. 2 is the synoptic diagram that is used for luminance compensating mechanism of the present invention;
Fig. 2 A is another synoptic diagram that is used for luminance compensating mechanism of the present invention;
Fig. 3 is the synoptic diagram of the Region Segmentation of non-volatility memorizer corresponding to the relation of the data before and after adding up and height/low bit and partial data;
Fig. 4 is another synoptic diagram that is used for the region allocation of non-volatility memorizer of the present invention; And
Fig. 5 is for being used for method preferred embodiment of the present invention.
Wherein, Reference numeral
10 display systems
101 volatile storages
102 drive IC
103 non-volatility memorizers
104 computing units
201 detectors
201a first detector
201b second detector
S501～509 steps
Embodiment
In a preferred embodiment of the present invention; Be divided into several regions in described non-volatility memorizer such as the flash memory; Each block (sector) is filled in data error-detecging code (like the CRC character) in the zone, when sense data, if calculate the error-detecging code of gained and the error-detecging code that originally deposited in not simultaneously; Just the data of representing this block are wrong, and the corresponding Backup Data that at this moment can read back replaces the block of mistake.
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; This detector 201 can be used for writing and reading back of data check sign indicating number, also can whether correct according to being used to differentiate the legacy data of reading/write non-volatility memorizer 103 if differentiating the new data read/write non-volatility memorizer 103.Furtherly; This detector 201 can be used for checking the colour brightness value that colour brightness accumulated value that this computing unit 104 is exported and this non-volatility memorizer 103 are stored; If it is correct; The colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer that allow this calculation element to export are write this non-volatility memorizer and this volatile storage respectively, make that the brightness of display is even.
This detector 201 also can be divided into one first detector 201a and one second detector 201b; It is respectively applied for writing and reading back of data check sign indicating number, and whether being used to differentiate the legacy data of reading/write non-volatility memorizer 103, to differentiate the new data read/write non-volatility memorizer 103 correct.This moment this computing unit 104 output through this first detector 201a and the second detector 201b to this non-volatility memorizer 103, like Fig. 2 A.
Preferable, this data check sign indicating number can be the CRC sign indicating number.
Preferable, the criterion of this detector 201 can be differentiated according to following equation, like Y-X＜K; Wherein Y will be for writing 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 the special time.Or like Y＜X.
Therefore, when original colour brightness accumulated value is wrong in differentiating wrong this non-volatility memorizer 103 that does not then write this non-volatility memorizer 103 and read of new colour brightness accumulated value, then use the corresponding Backup Data of 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,, cost use more times space to come storage data but being non-volatility memorizer 103.
For saving the space of non-volatility memorizer 103, in another preferred embodiment of the present invention, Fig. 3 further specifies the relation of the Region Segmentation of non-volatility memorizer 103 corresponding to the data before and after adding up and height/low bit and partial data.
Zone A stores the partial data or the higher bit data of whole image luminance compensation, zone C
1～iThen only depositing low Bit data (i is an integer, is 7 in the present embodiment), is example with Fig. 3, has 8 zones and comes to store in turn data updated, so not only can increase the indegree of writing of flash memory, and the repeatedly function of backup is also arranged.For example, when from zone C
7The data of reading back wrong (like CRC error) can be grabbed zone C
6Data reply, though the data of adjacent area and incomplete same, difference is little, can not cause notable difference to the brightness and the color of display.If zone C
6Data also wrong, just can grab zone C
5Data reply, by that analogy.
Wherein to this flash memory, and capacity that should zone A is than this C
1～iAverage size be big.
But such region allocation mode still has a problem; Because the data of low bit regions must calmodulin binding domain CaM A the higher bit data be only real data; Just can't reply if regional A higher bit data are wrong, the way of solution is to increase the data that another area B backs up regional A, like Fig. 4.
Write one at every turn and write the Counter Value of writing indegree simultaneously when regional, so that can judge which zone is the data of final updating be in when starting shooting again? So the program after the start can be represented as follows:
(1) judges the zone that writes at last, suppose it is zone C
i
(2) read in zone C simultaneously
iWith the data of regional A, and whether judgment data is wrong, if the data in two zones are all correct, then combines low Bit data and higher bit data to obtain partial data;
(3) if zone C
iRead in wrongly, then read in zone C
I-1, if the wrong zone C of then reading in again
I-2, the rest may be inferred; If the a-quadrant data are wrong, then read in the data of area B.Combine low Bit data and higher bit data to obtain partial data at last 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 that makes in the luminance compensating mechanism; This luminance compensating mechanism and a drive integrated circult operate together are to drive a display, and this method comprises:
S501: the non-volatility memorizer in this luminance compensating mechanism divided at least more than a first area and one second area
1～n(n is a 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;
S502: the higher bit or the complete bit of this colour brightness accumulated value are write this first area;
S503: the low bit of this colour brightness accumulated value is write this second area;
S504: judge the whether normal operation of this display, if normal operation, execution in step s502 or s503; If not, wait for that this display starts shooting again;
S505: when this display is started shooting again, from writing i.e. this second area in zone at last
jThe low bit of (j is the integer between 1～n) this colour brightness accumulated value that reads back, and the higher bit or the complete bit of this colour brightness accumulated value that reads back from this first area;
S506: whether judgement should be hanged down bit wrong; And
S507: if wrong, from this second area
J-1In the read back low bit of this colour brightness accumulated value.
Preferable, wherein further with this non-volatility memorizer one the 3rd zones of dividing, wherein the 3rd zone is as the backup of this first area more for this step s501.
Preferable, the method among Fig. 5, it further comprises:
S508: whether the higher bit of judging 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 zone this colour brightness accumulated value or this colour brightness accumulated value.
Preferable, said each zone has more than one block (sector).
Preferable, said a plurality of block all has an error-detecting code such as CRC sign indicating number.
Preferable, said second area further has a carry and uses dummy bit.
Preferable, described non-volatility memorizer is a flash memory.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (11)
1. luminance compensating mechanism, with a drive integrated circult operate together to drive a display, it is characterized in that this luminance compensating mechanism comprises:
One 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 said volatile storage colour brightness accumulated value in shutdown back from disappearing; And
One calculation element, each colour brightness value of said each point that is used for adding up; Wherein, Further comprise a detector between this calculation element and this non-volatility memorizer; In order to colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer of checking that this calculation element is exported; If correct, the colour brightness accumulated value and the stored colour brightness value of this non-volatility memorizer that allow this calculation element to export are write this non-volatility memorizer and this volatile storage respectively, make that the brightness of this display is even;
Wherein, the discriminant of this detector is Y-X＜K; Wherein Y will be for writing 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 the special time; Perhaps
The discriminant of this detector is Y＜X; Wherein Y will be for writing the new colour brightness accumulated value of this non-volatility memorizer, and X is original colour brightness accumulated value in this non-volatility memorizer.
2. device according to claim 1 is characterized in that, this volatile storage is a kind of by choosing in dynamic RAM and the static RAM.
3. device according to claim 1 is characterized in that, this non-volatility memorizer is a flash memory.
4. device according to claim 3 is characterized in that, this flash memory is split into the second area of group more than a first area and, and the capacity of this first area is big than the average size of this second area; Wherein this first area is used for storing the partial data or the higher bit of colour brightness accumulated value; This second area is used for storing the low bit of colour brightness accumulated value.
5. device according to claim 1 is characterized in that, this calculation element adds up according to the higher bit and the low bit two-part of said colour brightness value when being used for adding up each colour brightness value of said each point.
6. device according to claim 4 is characterized in that, this first area further comprises a data error-detecging code, when by this first area sense data, can check whether this data error-detecging code is correct to judge.
7. device according to claim 4 is characterized in that, this second area further comprises a data error-detecging code, when by this second area sense data, can check whether this data error-detecging code is correct to judge.
8. device according to claim 6 is characterized in that, this flash memory comprises that further three zone identical with the first area is with as its backup.
9. device according to claim 7 is characterized in that, further can be mutually as backup between the second area of the vicinity of these many groups.
10. device according to claim 6 is characterized in that, the data error-detecging code of this first area is a CRC sign indicating number.
11. device according to claim 7 is characterized in that, the data error-detecging code of this second area is a CRC sign indicating number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178596A CN102034459B (en) | 2009-09-29 | 2009-09-29 | Brightness compensation device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178596A CN102034459B (en) | 2009-09-29 | 2009-09-29 | Brightness compensation device and method |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210195663.4A Division CN102708837B (en) | 2009-09-29 | 2009-09-29 | Brightness compensation device and brightness compensation method |
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| CN102034459A CN102034459A (en) | 2011-04-27 |
| CN102034459B true CN102034459B (en) | 2012-10-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106504706B (en) * | 2017-01-05 | 2019-01-22 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and pixel compensation method |
| CN112116894B (en) * | 2019-06-20 | 2021-12-28 | 华为技术有限公司 | Brightness compensation method and device of display panel, display panel and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419226A (en) * | 2001-11-12 | 2003-05-21 | 精工爱普生株式会社 | Image display method and device, electronic machine |
| JP2005128272A (en) * | 2003-10-24 | 2005-05-19 | Pioneer Electronic Corp | Image display device |
| CN101083054A (en) * | 2006-05-31 | 2007-12-05 | 比亚迪股份有限公司 | Method and circuits for controlling brightness of three-color luminous diode used for back light source |
| 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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- 2009-09-29 CN CN200910178596A patent/CN102034459B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419226A (en) * | 2001-11-12 | 2003-05-21 | 精工爱普生株式会社 | Image display method and device, electronic machine |
| JP2005128272A (en) * | 2003-10-24 | 2005-05-19 | Pioneer Electronic Corp | Image display device |
| CN101083054A (en) * | 2006-05-31 | 2007-12-05 | 比亚迪股份有限公司 | Method and circuits for controlling brightness of three-color luminous diode used for back light source |
| 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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