CN1691122A - Color display system - Google Patents
Color display system Download PDFInfo
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- CN1691122A CN1691122A CN 200410037528 CN200410037528A CN1691122A CN 1691122 A CN1691122 A CN 1691122A CN 200410037528 CN200410037528 CN 200410037528 CN 200410037528 A CN200410037528 A CN 200410037528A CN 1691122 A CN1691122 A CN 1691122A
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Abstract
A color display system comprises a color signal source, a picture temporary storage unit, a storage unit, an OD operation revert module, a comparing unit and a multiplex comparing unit. Use multiplex comparing unit to compare OD operation revert value from OD operation revert module, bright gray-scale value from color signal source and comparing signal from comparing unit and output a result signal, make the system response color bright gray-scale quickly and accurately, which fit to LCD display, PDP, TFT or OLED, PLED and other color display devices.
Description
Technical field
The invention relates to a kind of Color display system, refer to a kind of Color display system that can react the chroma-luminance GTG quickly and accurately especially.
Technical background
The quality of LCD performance has a kind of index-response time, usually to the LCD following minute two states of making alive not: normal bright morphotype formula (Normally white, NW) and often deceive morphotype formula (Normallyblack, NB), wherein normal bright morphotype formula is meant that display pannel does not apply the picture that voltage is printing opacity, just bright picture, and often black morphotype formula is meant when display pannel does not apply voltage, present light tight state, just Hei picture; With normal bright morphotype formula is example, can be divided into two parts the response time:
(1) rise the response time: promptly applying under the voltage, the liquid crystal cell brightness of LCD changes to the 10% o'clock required time of reversing of liquid crystal, abbreviation " T from 90%
r"; And
(2) descend the response time, promptly do not applying under the voltage, liquid crystal cell brightness changes to 90% o'clock liquid crystal required turnaround time from 10%, is called for short " T
f".
Usually when the picture display speed surpasses 25 picture frames of per second (frame), human eye can be considered as continuous pictures with the picture of Fast transforms, but present home entertaining, for example play high-quality DVD film, the picture of fast moving when playing games, display speed is everlasting 60 of per seconds more than the picture frame, in other words, (frame interval) time is 1/60=16.67ms to each picture frame at interval, if response time of LCD is greater than this picture frame interval time, the vestige that just occurs ghost or jumping lattice in the time of will causing display frame, have a strong impact on the quality of watching image, how promoting response speed must be from influencing the factor of response time, and following equation is respectively the response time T that rises
rWith the response time T that descends
fCalculation equation:
γ wherein
1: the coefficient of viscosity of liquid crystal material;
D: cel-gap;
V: the driving voltage of liquid crystal cell;
Δ ε: the dielectric coefficient of liquid crystal material.
There are four methods can reduce the LCD response time as can be known by following formula: to reduce coefficient of viscosity, reduce cel-gap, improve driving voltage and improve dielectric coefficient, the technology that wherein improves driving voltage is referred to as " quickening to drive " (over drive) technology, can transmit the voltage of increase to liquid crystal panel by liquid crystal driving integrated circuit (driver IC), the voltage that reverses of liquid crystal is strengthened, thereby liquid crystal is reversed quickly and reply to reach the brightness that image data is desired to present fast.
For R, G, the brightness of B color signal at existing 8 bits, 0 to 255 rank, implement above-mentioned acceleration Driving technique, each dealer must provide suitable acceleration driving voltage value.Yet 0-255 rank R, the G that changes between different time points, the brightness of B color signal respectively have the acceleration driving voltage value of its different demands.Only change in the brightness of the 0-255 rank of two different time points, will produce 65536 kinds of different acceleration driving voltage values with a kind of color signal.
If a LCD Panel will provide the suitable acceleration driving voltage value of R, G, B color signal of 8 bits, then it must store 65536 kinds of different acceleration driving voltage values at least, does not say naturally and can explain for the demand of memory body, has more improved whole cost.Therefore, each tame dealer all comes analog representation with the color signal brightness on 0-255 rank with less section, and the brightness of formed color signal and the required acceleration driving voltage analogue value also are less than 65536 kinds far away.
Though these quicken the demand that the driving voltage analogue value has reduced memory body,, for making it quickly and accurately near the actual driving voltage value that quickens, each tame dealer all comes the computing simulation with different specific functions, or polynomial function, or bilinear function, again or orthogonal function.Just these modes all are limited to the above-mentioned acceleration driving voltage analogue value and are with inference, suppose that mode obtains, therefore on the actual acceleration of simulation driving voltage value, often can't accurately reach, not only influence the reaction time of LCD screen, more influence its chroma-luminance effect.And the chroma-luminance GTG that has reached the performance of institute desire when a LCD Panel continues to take OD value when requiring, and instead can form unsuitable chroma-luminance GTG and show.
In view of this, in order to improve the above-mentioned shortcoming of commonly using, the new way that sees through functional operation OD value and can react the Color display system of chroma-luminance GTG quickly and accurately is provided, and the inventor utilizes perspective of theory study design and experiment improvement, thus the present invention just in response to and give birth to.
Summary of the invention
Fundamental purpose of the present invention provides a kind of by the difference of more last picture frame intensity gray scale value with present picture frame intensity gray scale value, and whether decision takes the Color display system that can be reacted the chroma-luminance GTG by the OD value of functional operation gained quickly and accurately.
For reaching above-mentioned purpose, a kind of Color display system of the present invention comprises: a color signal source, and be in order to input color signal: a picture temporary storage location is the last picture frame intensity gray scale value in order to temporary Color display system; One storage element is in order to store OD compressed value table P, Q, R and S; One OD value computing recovery module is to comprise that an OD compressed value chooses unit, an OD compressed value functional operation unit and an OD compressed value computing reduction unit; One comparing unit; And multiplex's comparing unit; Its treatment step comprises:
(1) respectively by this picture temporary storage location and this color signal source import last picture frame intensity gray scale value and now picture frame intensity gray scale value to this OD value computing recovery module and this comparing unit;
(2) this OD compressed value choose the unit with above-mentioned present picture frame intensity gray scale value and last picture frame intensity gray scale value choose among this storage element stored OD compressed value table P, Q, R and the S particular value and intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x), this intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x) try to achieve intensity gray scale value function g (y) and h (x) via this OD compressed value functional operation unitary operation, intensity gray scale value function g (y) that is tried to achieve and h (x) via this OD compressed value computing reduction unit with function f (x, y)=c * h (x) * g (y) computing and an OD computing reducing value;
(3) more above-mentioned present picture frame intensity gray scale value of this comparing unit and last picture frame output intensity gray scale value if this last picture frame intensity gray scale value has reached present picture frame intensity gray scale value or both difference is in a certain error range, is then exported one and is exempted to use the OD message; And
(4) this multiplex's comparing unit is imported above-mentioned OD computing reducing value, above-mentioned present picture frame intensity gray scale value simultaneously and is above-mentionedly exempted to use the OD message, if this multiplex's comparing unit receives the above-mentioned OD message of exempting to use, then export above-mentioned present picture frame intensity gray scale value, and, then export above-mentioned OD computing reducing value if this multiplex's comparing unit does not receive the above-mentioned OD message of exempting to use;
By this, can make this Color display system react the chroma-luminance GTG quickly and accurately.
Description of drawings
Figure 1 shows that the system architecture diagram of first embodiment of the invention.
Figure 2 shows that the block diagram of first embodiment of the invention.
Figure 3 shows that the system architecture diagram of second embodiment of the invention.
Figure 4 shows that the block diagram of second embodiment of the invention.
The figure number explanation
1 Color display system
10 picture temporary storage locations, 20 color signal sources
30 storage elements, 40 OD value computing recovery module
50 comparing units, 60 multiplex's comparing units
41 OD compressed values are chosen 42 OD compressed value functional operation unit, unit
43 OD compressed value computing reduction units
44 temperature compensation units
Embodiment
A kind of Color display system of the present invention, be meant a kind of by the difference of more last picture frame intensity gray scale value with present picture frame intensity gray scale value, whether decision takes the Color display system that can be reacted the chroma-luminance GTG by acceleration driving (overdriving) magnitude of voltage (also claiming the OD value) of functional operation gained quickly and accurately, applicable to all kinds of color display device.
See also Fig. 1, Color display system 1 of the present invention, comprise: picture temporary storage location 10, it is the last picture frame intensity gray scale value in order to temporary Color display system 1, and color signal source 20 is in order to input color signal: storage element 30, be in order to store OD compressed value table P, Q, R and S, OD value computing recovery module 40 is to comprise that the OD compressed value chooses unit 41, OD compressed value functional operation unit 42 and OD compressed value computing reduction unit 43, comparing unit 50 and multiplex's comparing unit 60.
Shown in the 2nd figure, when showing a red color signal in Color display system 1, its treatment step comprises:
(1) respectively by picture temporary storage location 10 and the color signal source 20 last picture frame intensity gray scale values of input and now picture frame intensity gray scale value to OD value computing recovery module 40 and comparing unit 50;
(2) the OD compressed value choose unit 41 with above-mentioned present picture frame intensity gray scale value and last picture frame intensity gray scale value choose among storage element 30 stored OD compressed value table P, Q, R and the S particular value and intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x), this intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x) try to achieve intensity gray scale value function g (y) and h (x) via OD compressed value functional operation unit 42 computings, intensity gray scale value function g (y) that is tried to achieve and h (x) via OD compressed value computing reduction unit 43 with function f (x, y)=c * h (x) * g (y) computing and an OD computing reducing value;
(3) comparing unit 50 more above-mentioned present picture frame intensity gray scale values and last picture frame output intensity gray scale value if this last picture frame intensity gray scale value has reached present picture frame intensity gray scale value or both difference is in a certain error range, is then exported one and is exempted to use the OD message; And
(4) multiplex's comparing unit 60 is imported above-mentioned OD computing reducing value, above-mentioned present picture frame intensity gray scale value simultaneously and is above-mentionedly exempted to use the OD message, if multiplex's comparing unit 60 receives the above-mentioned OD message of exempting to use, then export above-mentioned present picture frame intensity gray scale value, and, then export above-mentioned OD computing reducing value if multiplex's comparing unit 60 does not receive the above-mentioned OD message of exempting to use;
By this, can make Color display system 1 react the chroma-luminance GTG quickly and accurately.
The second embodiment of the present invention is as shown in Figure 3, and Color display system 1 is except the included element of above-mentioned Fig. 1, and OD value computing recovery module 40 comprises temperature compensation unit 44 in addition, and in storage element 30 and store the OD compressed value table P of different temperatures
1-P
N, Q
1-Q
N, R
1-R
NAnd S
1-S
N, the N value is the total value for different temperatures OD compressed value table.
See also Fig. 4, Color display system 1 is to be in temperate zone country, and when desire showed blueness in Color display system 1, its treatment step comprised:
(1) respectively by picture temporary storage location 10 and the color signal source 20 last picture frame intensity gray scale values of input and now picture frame intensity gray scale value to OD value computing recovery module 40 and comparing unit 50;
(2) temperature compensation unit 44 according to the different temperatures demand by the OD compressed value table P in the above-mentioned storage element 30
1-P
N, Q
1-Q
N, R
1-R
NAnd S
1-S
NBe written into the OD compressed value table P of specified temp
2, Q
2, R
2And S
2
(3) the OD compressed value is chosen the above-mentioned specified temp that temperature compensation unit 44 compensated is chosen in unit 41 with above-mentioned present picture frame intensity gray scale value and last picture frame intensity gray scale value OD compressed value table P
2, Q
2, R
2And S
2And must intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x), this intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x) try to achieve intensity gray scale value function g (y) and h (x) via OD compressed value functional operation unit 42 computings, intensity gray scale value function g (y) that is tried to achieve and h (x) via OD compressed value computing reduction unit 43 with function f (x, y)=c * h (x) * g (y) computing and an OD computing reducing value;
(4) comparing unit 50 more above-mentioned present picture frame intensity gray scale values and last picture frame output intensity gray scale value, if this last picture frame intensity gray scale value has reached present picture frame intensity gray scale value or both difference is in a certain error range, as: difference is then exported one and is exempted to use the OD message in five intensity gray scale value; And
(5) multiplex's comparing unit 60 is imported above-mentioned OD computing reducing value, above-mentioned present picture frame intensity gray scale value simultaneously and is above-mentionedly exempted to use the OD message, if multiplex's comparing unit 60 receives the above-mentioned OD message of exempting to use, then export above-mentioned present picture frame intensity gray scale value, and, then export above-mentioned OD computing reducing value if multiplex's comparing unit 60 does not receive the above-mentioned OD message of exempting to use;
By this, can provide operation Color display system 1 to comply with the environmental demand of different regions, latitude or working space and react the chroma-luminance GTG quickly and accurately, show the LCD screen brightness and the color effect of the best.
The present invention is by comparison object brightness GTG value (picture frame intensity gray scale value now), OD computing reducing value and script intensity gray scale value (last picture frame intensity gray scale value) the comparative result message with object brightness GTG value (picture frame intensity gray scale value now), and can take suitable OD computing reducing value or direct export target intensity gray scale value fast, therefore, the present invention has following advantage:
1, fast reaction speed, minimizing reaction time: OD computing reducing value of the present invention is calculated by the OD compressed value, this OD compressed value then is by OD measuring value compression gained, so the present invention can the functional operation mode reduces the utmost point and is similar to actual OD value, need not check actual OD value, fast reaction speed, minimizing reaction time.
2, accurately show required OD value: OD computing reducing value of the present invention is calculated by the OD compressed value, this OD compressed value then is by OD measuring value compression gained, so the present invention reduces the OD computing reducing value utmost point of gained in the functional operation mode and is similar to actual OD value, accurately shows required OD value.
3, save hardware resource: the required storage area of OD compressed value of the present invention is little far beyond the OD measuring value, therefore can save hardware resource.
4, can be at the different work environment temperature, and provide liquid crystal molecule suitable OD value: because of the required storage area of OD compressed value of the present invention is little far beyond the OD measuring value, so can in existing memory body, store the OD compressed value table of different work environment temperature, it is required to be fit to different regions, latitude or working space, to show best LCD screen brightness and color effect.
Below only in order to disclosing the enforceable part aspect of the present invention, when can not be in order to limit scope of the present invention.All habit in the personage of this industry obviously can be done to change and application implementation person, all should be considered as not departing from flesh and blood of the present invention.
In sum, according to the content that is above disclosed, at intended purposes of the present invention, provide a kind of by the difference of more last picture frame intensity gray scale value with present picture frame intensity gray scale value, whether decision takes the Color display system that can be reacted the chroma-luminance GTG by the OD value of functional operation gained quickly and accurately, therefore proposes application for a patent for invention in accordance with the law.
Claims (6)
1, a kind of Color display system is characterized in that comprising:
One color signal source is in order to input color signal;
One picture temporary storage location is the last picture frame intensity gray scale value in order to temporary Color display system;
One storage element is to quicken to drive (over drive) voltage compressed value table P, Q, R and S in order to store;
One OD value computing recovery module is to comprise that an OD compressed value chooses unit, an OD compressed value functional operation unit and an OD compressed value computing reduction unit;
One comparing unit; And
One multiplex's comparing unit;
Its treatment step comprises:
(1) import last picture frame intensity gray scale value by this picture temporary storage location and this color signal source and now picture frame intensity gray scale value is to this OD value computing recovery module and this comparing unit, this present picture frame is next time point for this last picture frame;
(2) this OD compressed value choose the unit with above-mentioned present picture frame intensity gray scale value and last picture frame intensity gray scale value choose among this storage element stored OD compressed value table P, Q, R and the S particular value and intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x), this intensity gray scale value function g
1(y), g
2(y), h
1(x) and h
2(x) try to achieve intensity gray scale value function g (y) and h (x) via this OD compressed value functional operation unitary operation, intensity gray scale value function g (y) that is tried to achieve and h (x) via this OD compressed value computing reduction unit with function f (x, y)=c * h (x) * g (y) computing and an OD computing reducing value;
(3) more above-mentioned present picture frame intensity gray scale value of this comparing unit and last picture frame output intensity gray scale value if this last picture frame intensity gray scale value has reached present picture frame intensity gray scale value or both difference in a certain error range, is then exported one and is exempted to use the OD message; And
(4) this multiplex's comparing unit is imported above-mentioned OD computing reducing value, above-mentioned present picture frame intensity gray scale value simultaneously and is above-mentionedly exempted to use the OD message, if this multiplex's comparing unit receives the above-mentioned OD message of exempting to use, then export above-mentioned present picture frame intensity gray scale value, and, then export above-mentioned OD computing reducing value if this multiplex's comparing unit does not receive the above-mentioned OD message of exempting to use;
By this, can make this Color display system react the chroma-luminance GTG quickly and accurately.
2, as the described Color display system of above-mentioned claim 1, it is characterized in that: stored OD compressed value table P, Q, R and the S of this storage element is the OD compressed value table P that has different temperatures according to different temperatures
1-P
N, Q
1-Q
N, R
1-R
NAnd S
1-S
N, the N value is the total value for different temperatures OD compressed value table, and this OD value computing recovery module has a temperature compensation unit in addition, can be according to the different temperatures demand by above-mentioned OD compressed value table P
1-P
N, Q
1-Q
N, R
1-R
NAnd S
1-S
NBe written into the OD compressed value table of specified temp, import this OD compressed value again and choose the unit.
3, as the described Color display system of above-mentioned claim 1, it is characterized in that: this function f (x, y)=c * h (x) * g (y) is polynomial expression, bilinearity or orthogonal function.
4, as the described Color display system of above-mentioned claim 1, it is characterized in that: this color signal is the color signal for ruddiness, blue light or green glow (R, G, B), and the color signal of this ruddiness, blue light or green glow is to be respectively 8 bit signals.
5, as the described Color display system of above-mentioned claim 1, it is characterized in that: the OD computing reducing value that this multiplex's comparing unit is exported is to be output in liquid crystal panel, driver or time schedule controller T-con (Timing controller).
6, as the described Color display system of above-mentioned claim 1, it is characterized in that: be meant that LCD screen (LCDdisplay), plasma-screen television (PDP), active-matrix (TFT) display or OLED, PLED have sharp motor active display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100375282A CN100367338C (en) | 2004-04-28 | 2004-04-28 | Color display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100375282A CN100367338C (en) | 2004-04-28 | 2004-04-28 | Color display system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1691122A true CN1691122A (en) | 2005-11-02 |
| CN100367338C CN100367338C (en) | 2008-02-06 |
Family
ID=35346515
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100375282A Expired - Fee Related CN100367338C (en) | 2004-04-28 | 2004-04-28 | Color display system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7755871B2 (en) | 2007-11-28 | 2010-07-13 | Amazing Microelectronic Corp. | Power-rail ESD protection circuit with ultra low gate leakage |
| CN101609656B (en) * | 2008-06-20 | 2012-03-07 | 夏普株式会社 | Display control circuit, liquid crystal display device including the same, and display control method |
| CN101271673B (en) * | 2007-03-21 | 2012-07-04 | 晨星半导体股份有限公司 | Acceleration driving device and method |
| CN101364386B (en) * | 2007-08-07 | 2013-06-12 | 奇美电子股份有限公司 | Selective overdriving method and apparatus thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4188566B2 (en) * | 2000-10-27 | 2008-11-26 | 三菱電機株式会社 | Driving circuit and driving method for liquid crystal display device |
| KR100878267B1 (en) * | 2002-05-08 | 2009-01-13 | 삼성전자주식회사 | Liquid crystal display and method of modifying gray signals for the same |
| JP3673257B2 (en) * | 2002-06-14 | 2005-07-20 | 三菱電機株式会社 | Image data processing device, image data processing method, and liquid crystal display device |
-
2004
- 2004-04-28 CN CNB2004100375282A patent/CN100367338C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271673B (en) * | 2007-03-21 | 2012-07-04 | 晨星半导体股份有限公司 | Acceleration driving device and method |
| US8736529B2 (en) | 2007-03-21 | 2014-05-27 | Mstar Semiconductor, Inc. | Method and apparatus for generating an overdrive signal for a liquid crystal display |
| CN101364386B (en) * | 2007-08-07 | 2013-06-12 | 奇美电子股份有限公司 | Selective overdriving method and apparatus thereof |
| US7755871B2 (en) | 2007-11-28 | 2010-07-13 | Amazing Microelectronic Corp. | Power-rail ESD protection circuit with ultra low gate leakage |
| CN101609656B (en) * | 2008-06-20 | 2012-03-07 | 夏普株式会社 | Display control circuit, liquid crystal display device including the same, and display control method |
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|---|---|
| CN100367338C (en) | 2008-02-06 |
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