CN100517454C - Dynamic gamma circuit controlling method - Google Patents
Dynamic gamma circuit controlling method Download PDFInfo
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- CN100517454C CN100517454C CNB2006100773293A CN200610077329A CN100517454C CN 100517454 C CN100517454 C CN 100517454C CN B2006100773293 A CNB2006100773293 A CN B2006100773293A CN 200610077329 A CN200610077329 A CN 200610077329A CN 100517454 C CN100517454 C CN 100517454C
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- pixel data
- lcd
- control method
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- ancient woman
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
This invention relates to one LCD dynamic GAMMA control method, which comprises the following steps: summing up and weighting the red pixel data, green pixel data and blue pixel data by one first parameter, second parameter and one third parameter to get one GAMMA indication value; when the indication value equals to first, second and third parameters to form one GAMMA reference value, it selects one proper value from multiple GAMMA reference voltage through property part do display current frame.
Description
[technical field]
The present invention relates to a kind of dynamic gamma (GAMMA) control method of LCD, particularly about by the method for control an ancient woman's ornament Maqu line with the image contrast of improving Thin Film Transistor-LCD.
[background technology]
Thin Film Transistor-LCD (TFT-LCD) is accepted by market day by day because of the characteristic that its low power consumption, thin design, high image quality and large scale etc. are suitable as the display device of Digital Television, in recent years, the consumer has increasing chance to touch the image of high-speed mobile, and, be necessary on Thin Film Transistor-LCD, to use the technology of improving image in order to obtain the image quality of good high-speed mobile.
Because the immutable characteristic of an ancient woman's ornament agate voltage of LCD, therefore before the several years till, also do not have technology to realize under any data conditions that image improves not changing on the market.See also Fig. 1, it is the calcspar of an ancient woman's ornament agate generating circuit from reference voltage of conventional LCD, in Fig. 1, an ancient woman's ornament agate generating circuit from reference voltage 1 comprises that a special IC (ASIC) unit 10, a series connection resistance and buffer unit 11 and one source pole drive (Source Driving) integrated circuit unit 12.This ASIC comprises a Low Voltage Differential Signal circuit 101 and a timing controller 102, and both are in order to carry out the normal function of this ASIC unit 10.This resistance in series 11 is made of a plurality of resistance in series that is connected between a high voltage source and the low-voltage source (not shown).
The generation of an ancient woman's ornament agate reference voltage of this traditional type an ancient woman's ornament agate generating circuit from reference voltage 1 is analog, this ASIC unit 10 receives the input data and exports video data to this source electrode driven integrated circuit unit 12, voltage difference between this high voltage source and this low-voltage source is by these resistance in series 11 dividing potential drops, make an ancient woman's ornament agate reference voltage produce with simulated mode, then an ancient woman's ornament agate reference voltage just is sent to this source electrode driven integrated circuit unit 12.In the circuit arrangement of Fig. 1, way does not change an ancient woman's ornament agate voltage again after configuring this resistance in series 11.
Dynamic gamma control (DGC) is a kind of method that need not data manipulation but can improve image quality, and conceptive, DGC changes an ancient woman's ornament Maqu line adaptively and automatically by an ancient woman's ornament agate voltage that changes LCD.See also Fig. 2, it is the calcspar of an ancient woman's ornament agate generating circuit from reference voltage of use dynamic gamma control (DGC) technology of conventional LCD.
Similar with Fig. 1, an ancient woman's ornament agate generating circuit from reference voltage 2 of Fig. 2 still comprises an ASIC unit 20 and one source pole drive integrated circult unit 22.Yet the difference of Fig. 2 and Fig. 1 is to introduce histogram extraction (HistogramExtraction) 203 of this ASIC unit 20 and the one multi-channel digital/analog converter unit 21 that replaces this resistance in series 11.According to the dynamic gamma control that comprises that this histogram extracts and this an ancient woman's ornament agate voltage is controlled, by the multi-channel digital/analog converter unit with serial digital interface 21 of Fig. 2, just can change an ancient woman's ornament agate voltage according to each frame easily again.
When the key that an ancient woman's ornament agate generating circuit from reference voltage 2 of Fig. 2 can reach dynamic gamma control is to obtain to determine a particular algorithm of switch frame, and the algorithm that an ancient woman's ornament agate generating circuit from reference voltage 2 of Fig. 2 is adopted is so-called histogram extractive technique.Specifically, histogram extracts 203 basis and need to be an enough jumbo frame memory, and this frame memory is in order to the data of accumulating a last frame and the information of when switching is provided.
Therefore, for the applicant,, appeared in one's mind naturally in the heart to want to visualize and a kind ofly need not use frame memory and can reach the thought of the novel algorithm of dynamic gamma control in order to reduce the cost of manufacturing.
[summary of the invention]
The present invention proposes a kind of dynamic gamma (GAMMA) control method of LCD, and an an ancient woman's ornament agate generating circuit from reference voltage that possesses this dynamic gamma control function can be according to the illumination equation Y=X of LCD
1R+X
2G+X
3When B determine switch frame; Wherein Y is an an ancient woman's ornament agate indicated value, X
1~ X
3Be all parameter and R, G, B and be respectively a red pixel data summation, a green pixel data summation and a blue pixel data summation of present frame (PRESENT FRAME).By this dynamic gamma control, an ancient woman's ornament agate voltage of LCD just can change according to each frame easily and need not use frame memory, and then realizes perfect dynamic gamma control.
According to conception of the present invention, one aspect of the present invention proposes a kind of dynamic gamma (GAMMA) control method of LCD, this LCD by a plurality of an ancient woman's ornament agate reference voltages to show a present frame, and this present frame comprises a red pixel data summation, an one green pixel data summation and a blue pixel data summation, these pixel data summations are by all the red pixel data with at least one pixel in this present frame, the addition and obtaining respectively of all green pixel data and all blue pixel data, this dynamic gamma control method comprises the following steps: with one first parameter, one second parameter and one the 3rd parameter are respectively to this red pixel data summation, this green pixel data summation and this blue pixel data summation are weighted, and gained is obtained an an ancient woman's ornament agate indicated value mutually; And when this an ancient woman's ornament agate indicated value equals the formed an ancient woman's ornament agate reference value of this first parameter, this second parameter and the 3rd parameter addition, select in these a plurality of an ancient woman's ornament agate reference voltages certainly one be fit to the person and by this suitable person to show this present frame.
According to conception of the present invention, the present invention proposes a kind of dynamic gamma (GAMMA) control method of LCD on the other hand, this LCD by a plurality of an ancient woman's ornament agate reference voltages showing a present frame, this dynamic gamma control method comprise the following steps: by with all red pixel data, all green pixel data and all blue pixel data of at least one pixel in this present frame respectively addition obtain a red pixel data summation, a green pixel data summation and a blue pixel data summation; Respectively this red pixel data summation, this green pixel data summation and this blue pixel data summation are weighted with one first parameter, one second parameter and one the 3rd parameter, and gained is obtained an an ancient woman's ornament agate indicated value mutually; And when this an ancient woman's ornament agate indicated value equals the formed an ancient woman's ornament agate reference value of this first parameter, this second parameter and the 3rd parameter addition, select in these a plurality of an ancient woman's ornament agate reference voltages certainly one be fit to the person and by this suitable person to show this present frame.
According to conception of the present invention, further aspect of the present invention proposes a kind of dynamic gamma (GAMMA) control method of LCD, this LCD by a plurality of an ancient woman's ornament agate reference voltages showing a present frame, this dynamic gamma control method comprise the following steps: by with in this present frame all red pixel data, all green pixel data and all blue pixel data of pixels respectively addition obtain a red pixel data summation, a green pixel data summation and a blue pixel data summation; Respectively this red pixel data summation, this green pixel data summation and this blue pixel data summation are weighted with one first parameter, one second parameter and one the 3rd parameter, and gained is obtained an an ancient woman's ornament agate indicated value mutually; And when this an ancient woman's ornament agate indicated value equals the formed an ancient woman's ornament agate reference value of this first parameter, this second parameter and the 3rd parameter addition, select in these a plurality of an ancient woman's ornament agate reference voltages certainly one be fit to the person and by this suitable person to show this present frame.
The preferably, this LCD is a Thin Film Transistor-LCD.
The preferably, this LCD comprises a special IC (ASIC), in order to carry out this dynamic gamma control method.
The preferably, this special IC also comprises a Low Voltage Differential Signal circuit and a timing controller.
The preferably, this LCD also comprises one multi-channel digital/analog converter, in order to receive this an ancient woman's ornament agate indicated value and to send an ancient woman's ornament agate reference voltage that this is fit to.
The preferably, LCD also comprises the one source pole drive integrated circult, by this an ancient woman's ornament agate reference voltage that is fit to drive this LCD.
[description of drawings]
Fig. 1 is the calcspar of an ancient woman's ornament agate generating circuit from reference voltage of conventional LCD;
Fig. 2 is the calcspar that the use dynamic gamma of conventional LCD is controlled an ancient woman's ornament agate generating circuit from reference voltage of (DGC) technology;
Fig. 3 (a) is the calcspar of an ancient woman's ornament agate generating circuit from reference voltage of the use dynamic gamma control technology of LCD of the present invention; And
Fig. 3 (b) is the synoptic diagram of 25 pixels in the frame after the DGC unit of Fig. 3 (a) is weighted.
[primary clustering symbol description]
1 an ancient woman's ornament agate generating circuit from reference voltage
10 asic cells
101 Low Voltage Differential Signal circuit
102 timing controllers
11 resistance in seriess and buffer unit
12 source electrode driven integrated circuit unit
2 an ancient woman's ornament agate generating circuit from reference voltage
20 asic cells
201 Low Voltage Differential Signal circuit
202 timing controllers
203 histograms extract
21 multi-channel digitals/analog converter
22 source electrode driven integrated circuit unit
3 an ancient woman's ornament agate generating circuit from reference voltage
30 asic cells
301 Low Voltage Differential Signal circuit
302 timing controllers
303 arithmetic elements
31 multi-channel digitals/analog converter
32 source electrode driven integrated circuit unit
[embodiment]
The present invention must can make the more deep understanding of acquisition by following accompanying drawing and detailed description, but the explanation of following preferred embodiment is non-in order to limit protection scope of the present invention only for clear explaination the present invention.
See also Fig. 3 (a), it is the calcspar of an ancient woman's ornament agate generating circuit from reference voltage of the use dynamic gamma control technology of LCD of the present invention, in Fig. 3 (a), an ancient woman's ornament agate generating circuit from reference voltage 3 comprises a special IC (ASIC) unit 30, one multi-channel digital/analog converter unit 31 and one source pole drive integrated circult unit 32.Similar with prior art, this ASIC unit 30 comprises a Low Voltage Differential Signal circuit 301 and a timing controller 302 at least, and both are in order to carry out the normal function of this ASIC unit 30.Special feature is that technical characterictic of the present invention is to provide an arithmetic element 303, and it is the illumination formula Y=X according to LCD
1R+X
2G+X
3B and carry out computing; Wherein, Y is an an ancient woman's ornament agate indicated value, X
1~ X
3Be all parameter that the user can freely select and R, G, B is respectively a red pixel data summation, a green pixel data summation and the blue pixel data summation that all red pixel data of at least one pixel of the present frame of LCD, all green pixel data and all blue pixel data additions are respectively obtained.
As previously mentioned, this ASIC unit 30 receives the input data and exports video data to this drive integrated circult unit 32, voltage difference between this high voltage source and this low-voltage source is by 31 modulations of this multi-channel digital/analog converter unit, make an ancient woman's ornament agate reference voltage produce and dynamically change, then an ancient woman's ornament agate reference voltage just is sent to this source electrode driven integrated circuit unit 32 to improve image.
The algorithm of this arithmetic element 303 below is described.In this arithmetic element 303, according to the illumination formula Y=X of LCD
1R+X
2G+X
3B, red pixel data summation R (=∑ r
n), green pixel data summation G (=∑ g
n) and blue pixel data summation B (=∑ b
n) can be earlier respectively by one first parameter X
1, one second parameter X
2And one the 3rd parameter X
3Institute's weighting, after the weighting program, just with results added to obtain an ancient woman's ornament agate indicated value Y.Under optimal mode, can suppose this first parameter X
1, this second parameter X
2And the 3rd parameter X
3Three's addition forms an an ancient woman's ornament agate reference value and exists.In case this an ancient woman's ornament agate indicated value Y reaches this an ancient woman's ornament agate reference value, just in a plurality of these an ancient woman's ornament agate reference voltages, select an an ancient woman's ornament agate reference voltage that is fit to and send it to this source electrode driven integrated circuit unit 32 to drive this LCD.Therefore, this LCD just can show this present frame with the image contrast preferably after improving.
(1) preferred embodiment one
In general, compared to the light of another color, human eye vision is the sharpest for green glow, so this weighting of green pixel data summation G (i.e. this second parameter X
2) just can be configured to suppose this first parameter X greater than other two weightings at this
1, this second parameter X
2And the 3rd parameter X
3Be respectively 0.3,0.59 and 0.11, the machine equation of this unit 303 then is Y=0.3R+0.59G+0.11B.Under optimal mode, this an ancient woman's ornament agate reference value equal 1 (=0.3+0.59+0.11).Make several pixels at this present frame middle finger, then red pixel data, green pixel data and the blue pixel data of these pixels just can continue accumulation to produce this an ancient woman's ornament agate indicated value according to aforesaid equation.When detecting this an ancient woman's ornament agate indicated value and reach this an ancient woman's ornament agate reference value 1, just can switch to the next frame machine from this present frame.So, just, can realize the dynamic gamma control of LCD.
(2) preferred embodiment two
See also Fig. 3 (b), it is the synoptic diagram of 25 pixels in the frame after the DGC unit of Fig. 3 (a) is weighted.In this embodiment, with this first parameter X
1, this second parameter X
2And the 3rd parameter X
3Be assumed to be 3,6 and 1 respectively, the machine equation of this unit 303 then is Y=3R+6G+1B.Under optimal mode, this an ancient woman's ornament agate reference value equal 10 (=3+6+1).Make 25 pixels at this present frame middle finger, then red pixel data, green pixel data and the blue pixel data of these pixels just can continue accumulation to produce this an ancient woman's ornament agate indicated value according to aforesaid equation.When detecting this an ancient woman's ornament agate indicated value and reach this an ancient woman's ornament agate reference value 10, just can switch to the opportunity of next frame from this present frame.So, just, can realize the dynamic gamma control of LCD.
In aforesaid preferred embodiment, the size of specified number of pixels and three parameters can determine according to user's demand, and situation optionally can be specified the part pixel of this present frame or whole pixels.Utilize dynamic gamma control method provided by the present invention, an ancient woman's ornament agate voltage of LCD just can change according to each frame easily and need not use frame memory, and then reduces manufacturing cost and realize perfect dynamic gamma control.
In sum, purpose of the present invention is for providing a kind of an ancient woman's ornament agate generating circuit from reference voltage that possesses dynamic gamma control, and it can be according to the illumination equation Y=X of LCD
1R+X
2G+X
3When B determine switch frame; Wherein Y is an an ancient woman's ornament agate indicated value, X
1~ X
3Be all parameter and R, G, B and be respectively a red pixel data summation, a green pixel data summation and a blue pixel data summation of present frame.Utilize this dynamic gamma control, an ancient woman's ornament agate voltage of LCD just can change according to each frame easily by an ancient woman's ornament Maqu line of control LCD and need not use frame memory.
To those of ordinary skills, attendant advantages and various modification will be conspicuous.Therefore, the present invention then is not limited to detail and each embodiment in this displaying and description aspect wide in range at it.Therefore, under the scope that does not break away from by accessory claim of the present invention and its spirit that equivalent limited and key concept, can carry out various modifications.
Claims (18)
1, a kind of dynamic gamma control method of LCD, this LCD by a plurality of an ancient woman's ornament agate reference voltages to show a present frame, and this present frame comprises a red pixel data summation, a green pixel data summation and a blue pixel data summation, these pixel data summations by with all red pixel data, all green pixel data and all blue pixel data of at least one pixel in this present frame respectively addition obtain, this dynamic gamma control method comprises the following steps:
Utilize one first parameter to be weighted, to utilize one second parameter to be weighted and to utilize one the 3rd parameter that this blue pixel data summation is weighted, and gained is obtained an an ancient woman's ornament agate indicated value mutually this green pixel data summation to this red pixel data summation; And
When this an ancient woman's ornament agate indicated value equals the formed an ancient woman's ornament agate reference value of this first parameter, this second parameter and the 3rd parameter addition, select in these a plurality of an ancient woman's ornament agate reference voltages certainly one be fit to the person and by this suitable person to show this present frame.
2, dynamic gamma control method according to claim 1, wherein this LCD is a Thin Film Transistor-LCD.
3, dynamic gamma control method according to claim 1, wherein this LCD comprises a special IC, in order to carry out this dynamic gamma control method.
4, dynamic gamma control method according to claim 3, wherein this special IC comprises a Low Voltage Differential Signal circuit and a timing controller.
5, dynamic gamma control method according to claim 3, wherein this LCD also comprises one multi-channel digital/analog converter, in order to receive this an ancient woman's ornament agate indicated value and to send an ancient woman's ornament agate reference voltage that this is fit to.
6, dynamic gamma control method according to claim 5, wherein this LCD also comprises a drive integrated circult, by this an ancient woman's ornament agate reference voltage that is fit to drive this LCD.
7, a kind of dynamic gamma control method of LCD, to show a present frame, this dynamic gamma control method comprises the following steps: this LCD by a plurality of an ancient woman's ornament agate reference voltages
By with all red pixel data, all green pixel data and all blue pixel data of at least one pixel in this present frame respectively addition obtain a red pixel data summation, a green pixel data summation and a blue pixel data summation;
Utilize one first parameter to be weighted, to utilize one second parameter to be weighted and to utilize one the 3rd parameter that this blue pixel data summation is weighted, and gained is obtained an an ancient woman's ornament agate indicated value mutually this green pixel data summation to this red pixel data summation; And
When this an ancient woman's ornament agate indicated value equals the formed an ancient woman's ornament agate reference value of this first parameter, this second parameter and the 3rd parameter addition, select in these a plurality of an ancient woman's ornament agate reference voltages certainly one be fit to the person and by this suitable person to show this present frame.
8, dynamic gamma control method according to claim 7, wherein this LCD is a Thin Film Transistor-LCD.
9, dynamic gamma control method according to claim 7, wherein this LCD comprises a special IC, in order to carry out this dynamic gamma control method.
10, dynamic gamma control method according to claim 9, wherein this special IC comprises a Low Voltage Differential Signal circuit and a timing controller.
11, dynamic gamma control method according to claim 9, wherein this LCD also comprises one multi-channel digital/analog converter, in order to receive this an ancient woman's ornament agate indicated value and to send an ancient woman's ornament agate reference voltage that this is fit to.
12, dynamic gamma control method according to claim 11, wherein this LCD also comprises a drive integrated circult, by this an ancient woman's ornament agate reference voltage that is fit to drive this LCD.
13, a kind of dynamic gamma control method of LCD, to show a present frame, this dynamic gamma control method comprises the following steps: this LCD by a plurality of an ancient woman's ornament agate reference voltages
By with in this present frame all red pixel data, all green pixel data and all blue pixel data of pixels respectively addition obtain a red pixel data summation, a green pixel data summation and a blue pixel data summation;
Utilize one first parameter to this red pixel data summation, utilize one second parameter to be weighted and to utilize one the 3rd parameter that this blue pixel data summation is weighted to this green pixel data summation, and gained is obtained mutually an an ancient woman's ornament agate indicated value; And
When this an ancient woman's ornament agate indicated value equals the formed an ancient woman's ornament agate reference value of this first parameter, this second parameter and the 3rd parameter addition, select in these a plurality of an ancient woman's ornament agate reference voltages certainly one be fit to the person and by this suitable person to show this present frame.
14, dynamic gamma control method according to claim 13, wherein this LCD is a Thin Film Transistor-LCD.
15, dynamic gamma control method according to claim 13, wherein this LCD comprises a special IC, in order to carry out this dynamic gamma control method.
16, dynamic gamma control method according to claim 15, wherein this special IC comprises a Low Voltage Differential Signal circuit and a timing controller.
17, dynamic gamma control method according to claim 15, wherein this LCD also comprises one multi-channel digital/analog converter, in order to receive this an ancient woman's ornament agate indicated value and to send an ancient woman's ornament agate reference voltage that this is fit to.
18, dynamic gamma control method according to claim 17, wherein this LCD also comprises a drive integrated circult, by this an ancient woman's ornament agate reference voltage that is fit to drive this LCD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100773293A CN100517454C (en) | 2006-04-30 | 2006-04-30 | Dynamic gamma circuit controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100773293A CN100517454C (en) | 2006-04-30 | 2006-04-30 | Dynamic gamma circuit controlling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101064094A CN101064094A (en) | 2007-10-31 |
| CN100517454C true CN100517454C (en) | 2009-07-22 |
Family
ID=38965087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100773293A Expired - Fee Related CN100517454C (en) | 2006-04-30 | 2006-04-30 | Dynamic gamma circuit controlling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100517454C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI512716B (en) * | 2014-04-23 | 2015-12-11 | Au Optronics Corp | Display panel and driving method thereof |
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2006
- 2006-04-30 CN CNB2006100773293A patent/CN100517454C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101064094A (en) | 2007-10-31 |
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Granted publication date: 20090722 Termination date: 20160430 |