CN1770250A - Dynamic tone compensation circuit and dynamic tone compensation method - Google Patents
Dynamic tone compensation circuit and dynamic tone compensation method Download PDFInfo
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- CN1770250A CN1770250A CN 200410088436 CN200410088436A CN1770250A CN 1770250 A CN1770250 A CN 1770250A CN 200410088436 CN200410088436 CN 200410088436 CN 200410088436 A CN200410088436 A CN 200410088436A CN 1770250 A CN1770250 A CN 1770250A
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Abstract
Disclosed is a dynamic contrast compensating circuit which comprises analysis unit, a plurality gamma voltage generator and selector. Wherein the analysis unit is used for analyzing gray degrees distribution status of dynamic image signal, and each gamma voltage generator generates gamma voltage according to gamma characteristic curve. The selector is coupled between the analysis unit and gamma voltage generator for selecting one gamma voltage generator to output gamma voltage corresponding to the dynamic image signal according analysis results. The dynamic contrast compensation circuit changes display driving gamma voltage according to the gray degree distribution status of dynamic image signal to improve image display quality.
Description
Technical field
The invention relates to a kind of compensating circuit and method, and particularly about a kind of dynamic tone compensating circuit of display and the invention of method.
Background technology
Science and technology is flourishing to make the human lives convenient more.Need be dependent on various electronic products everywhere in people's life, for example cash machine, personal computer, mobile phone and televisor etc.Information that people can the electron gain product be provided by display and the state of understanding electronic product.
Display is divided into multiple display according to its video picture principle, and wherein (flatpanel display FPD) replaces conventional cathode ray kinescope (cathode raytube, CRT) display to flat-panel screens gradually.FPD is the general name of display panel shape, comprise LCD (liquid crystal display, LCD), plasma scope (plasma displaypanel, PDP), organic light emitting display (organic light emitting display, OLED) and field emission displays (field emission display, FED) etc.
Generally speaking, LCD is by applying specific driving voltage so that the liquid crystal deflection special angle come display image in order to drive liquid crystal, and this driving voltage is to be provided by picture signal (being generally digital signal) conversion.Yet, aforementioned picture signal, driving voltage size and liquid crystal deflection the angle pass of pixel transmittance even are not to be linear to close, so just need gamma correction circuit to adjust the driving voltage that picture signal provides, so that driving voltage that picture signal provided and liquid crystal deflection angle or pixel penetrance (transmittance) are linear close (linear relationship).
Known character used in proper names and in rendering some foreign names agate bearing calibration is converted to analog driving voltage according to single character used in proper names and in rendering some foreign names agate family curve (gammacharacteristic curve) with digital picture signal, to drive liquid crystal molecule.That is to say, all images signal in the input display all is the driving voltages that are scaled display with identical character used in proper names and in rendering some foreign names agate value, so the bearing calibration of known character used in proper names and in rendering some foreign names agate is not adjusted character used in proper names and in rendering some foreign names agate value along with the change of picture signal, thereby make the audience can't in the black or white partially partially picture of background, clearly watch each image in the picture.Hence one can see that, and the bearing calibration of known character used in proper names and in rendering some foreign names agate also can't distinctly provide best contrast at dynamic image signal, thereby can't provide best display quality.
Summary of the invention
Therefore, purpose of the present invention just provides a kind of dynamic tone compensating circuit, can decide the driving voltage of display according to different picture signals with different character used in proper names and in rendering some foreign names agate family curves.
Another object of the present invention provides the method for a kind of dynamic tone compensation, can be at each dynamic image and its contrast of dynamic compensation, and to improve the quality of image.
The present invention proposes a kind of dynamic tone compensating circuit, is suitable for compensating the dynamic image signal that inputs to display.This dynamic tone compensating circuit mainly comprises analytic unit, a plurality of character used in proper names and in rendering some foreign names agate voltage generator (gamma voltage generator) and selector switch (selector).Wherein, analytic unit is in order to analyzing the gray-scale distribution situation of this dynamic image signal, and exports analytic signal according to analysis result, and each character used in proper names and in rendering some foreign names agate voltage generator produces character used in proper names and in rendering some foreign names agate voltage in order to foundation character used in proper names and in rendering some foreign names agate family curve.Selector switch then is electrically coupled between analytic unit and the character used in proper names and in rendering some foreign names agate voltage generator, in order to select in these character used in proper names and in rendering some foreign names agate voltage generators according to this analytic signal, produce character used in proper names and in rendering some foreign names agate voltage by the character used in proper names and in rendering some foreign names agate family curve in these character used in proper names and in rendering some foreign names agate voltage generators again corresponding to dynamic image signal.
The present invention proposes a kind of method of dynamic tone compensation, is suitable for compensating the dynamic image signal that inputs to display, and the method for this dynamic tone compensation is analyzed the gray-scale distribution situation of dynamic image signal earlier, and exports analytic signal according to analysis result.Then select character used in proper names and in rendering some foreign names agate family curve according to this analytic signal, the selected character used in proper names and in rendering some foreign names agate family curve of foundation is exported the character used in proper names and in rendering some foreign names agate voltage corresponding to this dynamic image signal again.
The present invention can be applicable in the procedure for displaying of dynamic menu, and change the character used in proper names and in rendering some foreign names agate value that desire is converted to dynamic image signal the driving voltage of display, and then improve the display quality of picture according to the GTG of dynamic image signal in each frame time (frame time).
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the schematic flow sheet of method of a kind of dynamic tone compensation of a preferred embodiment of the present invention.
Fig. 2 is the block diagram of a kind of dynamic tone compensating circuit of a preferred embodiment of the present invention.
The main element description of symbols
S100: analyze the dynamic image signal that inputs to display, and export analytic signal according to analysis result
S102: select character used in proper names and in rendering some foreign names agate family curve according to analytic signal
S104: export character used in proper names and in rendering some foreign names agate voltage according to selected character used in proper names and in rendering some foreign names agate family curve corresponding to this dynamic image signal
200: the dynamic tone compensating circuit
202: analytic unit
204,204_1,204_2,204_3,204_n: character used in proper names and in rendering some foreign names agate voltage generator
206: selector switch
208: on-off element
AS: analytic signal
DIS: dynamic image signal
Embodiment
Fig. 1 is the schematic flow sheet of method of a kind of dynamic tone compensation of a preferred embodiment of the present invention.The method of this kind dynamic tone compensation is applicable to that compensation inputs to the GTG of the dynamic image signal of display (not expressing among the figure), and this dynamic image signal has different gray-scale distribution in different frame times.Please refer to Fig. 1, the method is analyzed the gray-scale distribution of the dynamic image signal that inputs to display earlier, and exports analytic signal according to analysis result, as described in step S100.In a preferred embodiment, step S100 for example is that (ApplicationSpecific Integrated Circuit ASC) analyzes dynamic image signal, so that obtain the gray-scale distribution of dynamic image signal by the specific function integrated circuit.
Then, select character used in proper names and in rendering some foreign names agate family curve, as described in step S102 according to the analytic signal of being exported among the step S100.Wherein, the result who goes out when analytic signal is shown is that the GTG of dynamic image signal in this frame time is distributed in the low order timing mostly, then selects the less character used in proper names and in rendering some foreign names agate family curve of character used in proper names and in rendering some foreign names agate value.In a preferred embodiment, for example be the character used in proper names and in rendering some foreign names agate family curve of selecting character used in proper names and in rendering some foreign names agate value to equal 2.0.If the shown result who goes out of analytic signal is that the GTG of dynamic image signal in this frame time is distributed in the high-order timing mostly, then select the bigger character used in proper names and in rendering some foreign names agate family curve of character used in proper names and in rendering some foreign names agate value.In a preferred embodiment, for example be the character used in proper names and in rendering some foreign names agate family curve of selecting character used in proper names and in rendering some foreign names agate value to equal 2.4.In addition, in one embodiment, if the shown result who goes out of analytic signal is that the GTG of dynamic image signal in this frame time is distributed in the scala media timing between high-order and the low order mostly, the character used in proper names and in rendering some foreign names agate family curve of then selecting character used in proper names and in rendering some foreign names agate value to equal 2.2.
From the above, export character used in proper names and in rendering some foreign names agate voltage afterwards again according to selected character used in proper names and in rendering some foreign names agate family curve, as described in step S104 corresponding to this dynamic image signal.In a preferred embodiment, step S104 for example is that (operator, the character used in proper names and in rendering some foreign names agate voltage generator that OP) is constituted is exported the character used in proper names and in rendering some foreign names agate voltage corresponding to dynamic image signal by a plurality of resistance in seriess and arithmetical unit.
It should be noted that, the present invention in each frame time of display frame all repeating step S100 to step S104, export comparatively suitable character used in proper names and in rendering some foreign names agate voltage so that tackle the variation of the gray-scale distribution of each dynamic image signal, and then make the audience can watch preferable picture quality.
The gray-scale distribution situation of the method view image signal of the present invention's dynamic tone compensation decides the character used in proper names and in rendering some foreign names agate value that this dynamic image signal is changed into the driving voltage of display, so the present invention can improve the display quality of display in dynamic menu.Below the circuit of the dynamic tone compensation method of carrying out the present invention will be described for an embodiment, but it is not in order to limit the present invention.So the ordinary skill of technical field that the present invention belongs to should be understood that the circuit that the method for the present invention's dynamic tone compensation still can other form carries out.
Fig. 2 is the block diagram of a kind of dynamic tone compensating circuit of a preferred embodiment of the present invention.Please refer to Fig. 2, dynamic tone compensating circuit 200 is arranged in the display (not expressing among the figure), so that the dynamic image signal DIS that display is received is converted to simulating signal by digital signal, and make the penetrance of this simulating signal and liquid crystal deflection angle or pixel linear.Dynamic tone compensating circuit 200 mainly comprises analytic unit 202, a plurality of character used in proper names and in rendering some foreign names agate voltage generator 204 and selector switch 206.Wherein, analytic unit 202 inputs to the situation of gray-scale distribution of the dynamic image signal DIS of display in order to analysis, and exports analytic signal AS to selector switch 206 according to analysis result.In a preferred embodiment, analytic unit 202 for example is the specific function integrated circuit, in order to analyze the gray-scale distribution situation of dynamic image signal in different frame times.Particularly, analytic unit 202 is for example represented the gray-scale distribution situation of dynamic image signal with statistical graph, and statistical graph judges that the shown picture that goes out of this dynamic image signal is the still middle contrast of deflection of deflection black (low contrast), deflection white (high contrast) in view of the above.
It should be noted that especially in above-mentioned these character used in proper names and in rendering some foreign names agate voltage generators 204, all produce character used in proper names and in rendering some foreign names agate voltage according to the character used in proper names and in rendering some foreign names agate family curve that it had.In addition, character used in proper names and in rendering some foreign names agate voltage generator 204 is made of the resistance and the arithmetical unit of a plurality of series connection respectively, and its character used in proper names and in rendering some foreign names agate voltage generator with at present common is identical haply, the people who is familiar with this technology will be appreciated that its detailed structure, will repeat no more herein.
In addition, in one embodiment, can be provided with on-off element 208 between selector switch 206 and these character used in proper names and in rendering some foreign names agate voltage generators 204, in order to the path between control selector switch 206 and these character used in proper names and in rendering some foreign names agate voltage generators 204.
For instance, when the picture color that the analytic signal display image signals of being exported when analytic unit 202 is manifested is partial to black, then selector switch 206 can equal path between 2.0 the characteristic character used in proper names and in rendering some foreign names agate of the character used in proper names and in rendering some foreign names agate voltage generator 204_1 by on-off element 208 conductings and character used in proper names and in rendering some foreign names agate value, and make character used in proper names and in rendering some foreign names agate voltage generator 204_1 produce character used in proper names and in rendering some foreign names agate voltage, so that watch the audience of picture can in this is partial to the picture of black, clearly watch scenery in this picture corresponding to dynamic image signal according to the character used in proper names and in rendering some foreign names agate family curve that it had.Otherwise, when the picture color deflection that the analytic signal display image signals of being exported when analytic unit 202 is manifested is white, then selector switch 206 can equal path between 2.4 the characteristic character used in proper names and in rendering some foreign names agate of the character used in proper names and in rendering some foreign names agate voltage generator 204_3 by on-off element 208 conductings and character used in proper names and in rendering some foreign names agate value, and makes character used in proper names and in rendering some foreign names agate voltage generator 204_3 produce character used in proper names and in rendering some foreign names agate voltage corresponding to dynamic image signal according to the character used in proper names and in rendering some foreign names agate family curve that it had.In addition, when the picture color that the analytic signal display image signals of being exported when analytic unit 202 is manifested is moderate, then selector switch 206 also can equal path between 2.2 the characteristic character used in proper names and in rendering some foreign names agate of the character used in proper names and in rendering some foreign names agate voltage generator 204_2 by on-off element 208 conductings and character used in proper names and in rendering some foreign names agate value, so that this picture signal can show the picture of better quality.
The present invention analyzes the dynamic image signal that inputs in the display earlier, and obtains the situation of the gray-scale distribution of this picture signal.Select suitable character used in proper names and in rendering some foreign names agate voltage according to this analysis result more afterwards, so that driving display, and then make the color of the shown picture that goes out of display comparatively obvious.Therefore, the present invention can be applicable in the procedure for displaying of dynamic menu, changes character used in proper names and in rendering some foreign names agate value with foundation dynamic image signal different gray-scale distribution in each frame time, and then improves the display quality of picture.And owing to resistance and the arithmetical unit of the character used in proper names and in rendering some foreign names agate voltage generator in the present invention's the dynamic tone compensating circuit by a plurality of series connection constituted, the element cost is not high, therefore can't increase the cost in the manufacturing.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; the ordinary skill of any technical field that the present invention belongs to; in thought that does not break away from the present invention and scope; when can doing a little change and improvement, so the present invention's protection domain is as the criterion when looking claims person of defining.
Claims (8)
1. a dynamic tone compensating circuit is suitable for the dynamic image signal that compensation inputs to display, it is characterized in that this dynamic image signal has different gray-scale distribution situations in different frame times, and this dynamic tone compensating circuit comprises:
Analytic unit in order to analyzing the gray-scale distribution of this dynamic image signal, and is exported analytic signal according to analysis result;
A plurality of character used in proper names and in rendering some foreign names agate voltage generators, each above-mentioned these character used in proper names and in rendering some foreign names agate voltage generator produces character used in proper names and in rendering some foreign names agate voltage according to character used in proper names and in rendering some foreign names agate family curve respectively; And
Selector switch, be electrically coupled with between this analytic unit and above-mentioned these character used in proper names and in rendering some foreign names agate voltage generators, this selector switch is selected in above-mentioned these character used in proper names and in rendering some foreign names agate voltage generators according to this analytic signal, and by selecteed this character used in proper names and in rendering some foreign names agate voltage generator output this character used in proper names and in rendering some foreign names agate voltage corresponding to the gray-scale distribution of this dynamic image signal.
2. the dynamic tone compensating circuit according to claim 1 is characterized in that this analytic unit comprises a specific function integrated circuit.
3. the dynamic tone compensating circuit according to claim 1, it is characterized in that also comprising a plurality of on-off elements, above-mentioned these on-off elements are electrically coupled with respectively between this selector switch and above-mentioned these character used in proper names and in rendering some foreign names agate voltage generators, and the unlatching of above-mentioned these on-off elements or closed condition are by this selector switch control.
4. the dynamic tone compensating circuit according to claim 1, it is characterized in that above-mentioned these character used in proper names and in rendering some foreign names agate voltage generators comprise three character used in proper names and in rendering some foreign names agate voltage generators at least, and above-mentioned these character used in proper names and in rendering some foreign names agate family curves in above-mentioned these character used in proper names and in rendering some foreign names agate voltage generators comprise that at least character used in proper names and in rendering some foreign names agate value equals 2.0 character used in proper names and in rendering some foreign names agate family curve, character used in proper names and in rendering some foreign names agate value and equals the character used in proper names and in rendering some foreign names agate family curve that 2.2 character used in proper names and in rendering some foreign names agate family curve and character used in proper names and in rendering some foreign names agate value equal 2.4.
5. the method for dynamic tone compensation is suitable for compensating the dynamic image signal of display, it is characterized in that this dynamic image signal has different gray-scale distribution situations in different frame times, and in a frame time, the method for this dynamic tone compensation comprises:
(a) analyze the gray-scale distribution of this dynamic image signal, and export analytic signal according to analysis result;
(b) select corresponding character used in proper names and in rendering some foreign names agate family curve according to this analytic signal; And
(c) export character used in proper names and in rendering some foreign names agate voltage according to selected this character used in proper names and in rendering some foreign names agate family curve corresponding to the GTG of this dynamic image signal.
6. according to the method for the described dynamic tone of claim 5 compensation, the step that it is characterized in that analyzing this picture signal comprises with the specific function integrated circuit to be analyzed this picture signal.
7. according to the method for the described dynamic tone of claim 5 compensation, it is characterized in that also being included in next frame in the time repeating step (a) to step (c).
8. according to the method for the described dynamic tone of claim 5 compensation, it is characterized in that in the characteristic step of selecting corresponding to this analytic signal of this character used in proper names and in rendering some foreign names agate, comprise that at least equaling 2.0 character used in proper names and in rendering some foreign names agate family curve, character used in proper names and in rendering some foreign names agate value from character used in proper names and in rendering some foreign names agate value equals 2.2 character used in proper names and in rendering some foreign names agate family curve and character used in proper names and in rendering some foreign names agate value and equal to select one among 2.4 the character used in proper names and in rendering some foreign names agate family curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100884367A CN100514429C (en) | 2004-11-03 | 2004-11-03 | Dynamic tone compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100884367A CN100514429C (en) | 2004-11-03 | 2004-11-03 | Dynamic tone compensation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1770250A true CN1770250A (en) | 2006-05-10 |
| CN100514429C CN100514429C (en) | 2009-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100884367A Expired - Fee Related CN100514429C (en) | 2004-11-03 | 2004-11-03 | Dynamic tone compensation circuit |
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| Country | Link |
|---|---|
| CN (1) | CN100514429C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102446479A (en) * | 2010-10-12 | 2012-05-09 | 群康科技(深圳)有限公司 | Display and driving method thereof |
| CN102568396A (en) * | 2007-03-26 | 2012-07-11 | 日本电气株式会社 | Mobile phone terminal and corresponding method thereof |
| CN104021767A (en) * | 2013-03-01 | 2014-09-03 | 刘鸿达 | Gamma curve adjusting method, gamma voltage generator and display device |
| WO2019119792A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and device for display device |
| WO2019119791A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and driving apparatus for display apparatus |
| WO2019119794A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and driving apparatus for display apparatus |
| WO2019119793A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and driving device for display device |
| WO2020118927A1 (en) * | 2018-12-11 | 2020-06-18 | 惠科股份有限公司 | Method for driving display panel, and display panel |
-
2004
- 2004-11-03 CN CNB2004100884367A patent/CN100514429C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568396A (en) * | 2007-03-26 | 2012-07-11 | 日本电气株式会社 | Mobile phone terminal and corresponding method thereof |
| CN102446479A (en) * | 2010-10-12 | 2012-05-09 | 群康科技(深圳)有限公司 | Display and driving method thereof |
| CN102446479B (en) * | 2010-10-12 | 2014-04-30 | 群康科技(深圳)有限公司 | Display and driving method thereof |
| CN104021767A (en) * | 2013-03-01 | 2014-09-03 | 刘鸿达 | Gamma curve adjusting method, gamma voltage generator and display device |
| CN104021767B (en) * | 2013-03-01 | 2016-12-28 | 刘鸿达 | Gamma curve method of adjustment and its gal code voltage generator and display device |
| WO2019119792A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and device for display device |
| WO2019119791A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and driving apparatus for display apparatus |
| WO2019119794A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and driving apparatus for display apparatus |
| WO2019119793A1 (en) * | 2017-12-20 | 2019-06-27 | 惠科股份有限公司 | Driving method and driving device for display device |
| WO2020118927A1 (en) * | 2018-12-11 | 2020-06-18 | 惠科股份有限公司 | Method for driving display panel, and display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100514429C (en) | 2009-07-15 |
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Granted publication date: 20090715 Termination date: 20191103 |