CN100442331C - Two-dimensional display and its image calibrating circuit and method - Google Patents
Two-dimensional display and its image calibrating circuit and method Download PDFInfo
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- CN100442331C CN100442331C CNB2005100986609A CN200510098660A CN100442331C CN 100442331 C CN100442331 C CN 100442331C CN B2005100986609 A CNB2005100986609 A CN B2005100986609A CN 200510098660 A CN200510098660 A CN 200510098660A CN 100442331 C CN100442331 C CN 100442331C
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Abstract
The image correction circuit for a plane display includes an AD unit with a temperature sensor connected with a Gamma voltage generator, and a data processing unit connected with former sensor to select and output data to the AD unit to let the later output preset Gamma voltage at room temperature. Wherein, the sensor is used to detect the Gamma generator running temperature.
Description
Technical field
The present invention relates to a kind of circuit and method of correcting image, and be particularly related to a kind of flat-panel screens and image calibrating circuit and method.
Background technology
Because the arrival of information society, also grow with each passing day as the demand of the display of information media, so industry drops into the development of related display with all strength.Wherein, (CathodeRay Tube, CRT) therefore display monopolizes the monitor market all the year round because of having superior display quality and technology maturation with cathode-ray tube (CRT) again.Yet, high-tech product tends to frivolous and miniaturization gradually in recent years, therefore have that high picture quality, space utilization efficient are good, LCD (the Liquid Crystal Display of low consumpting power, advantageous characteristic such as radiationless, LCD) replace cathode-ray tube display gradually, and become the main flow of present monitor market.
Generally speaking, LCD is by applying specific driving voltage so that the liquid crystal deflection special angle use the driving liquid crystal and come display image, 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 relation of pixel transmittance even are not linear, so just need Gamma correction (gammacorrection) 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) linear (linear relationship).
At present the gamma voltage of display is formed by the electric resistance partial pressure of series connection mostly, and in traditional LCD, this resistance string (resister stream) be arranged at printed circuit board (PCB) outside the panel (printcircuit board, PCB) on.But in system's (as the chip for driving or dynamic gamma corrective system of mobile phone) of a new generation, the resistance string of gamma voltage institute reference is arranged in digital-to-analogue conversion (digital-analog converter) circuit, and D/A conversion circuit be built in this resistance string integrated circuit (integrated circuit, IC) in.
Fig. 1 is the circuit block diagram of known gamma voltage generator.Please refer to Fig. 1, gamma voltage generator 100 mainly is made of resistance string 102, a plurality of selector switch 104 and partial pressure unit 106.As its name suggests, resistance string 102 promptly is made up of a plurality of resistance that are cascaded, and it is built in the integrated circuit (not shown) in for example being.104 of selector switchs are electrically connected between resistance string 102 and the partial pressure unit 106.For instance, selector switch 104 utilizes 3 control code (code) to be controlled, so the magnitude of voltage that each selector switch 104 is exported all has 8 kinds of different selections.
On the other hand, with the LCD on 64 rank, each selector switch 104 is according to its inner stored control code, and reference resistance string 102 and output voltage V respectively
0, V
1, V
8, V
20, V
43, V
55, V
62And V63 is to partial pressure unit 106, and partial pressure unit 106 comes dividing potential drop to produce all gamma voltage V according to these voltages again
0, V
1, V
2, V
3..., V
8, V
9, V
10..., V
20, V
21..., V
55, V
56, V
57..., V
62And V
63
With the LCD on 256 rank, the voltage difference between each contrast is about 20mV, and in the LCD on 1024 rank of following desire exploitation, the difference between each contrast is small especially.Therefore, how making the stable output of LCD gamma voltage, to keep certain output image quality, is present very important problem.
Yet, when integrated circuit is under the hot environment or cause working temperature to raise because of working long hours, in be built in the phenomenon that the resistance drift will take place for resistance string 102 in the integrated circuit, thereby the gamma voltage that causes gamma voltage generator 100 to be exported is different with the predetermined magnitude of voltage of exporting under the room temperature, causes the quality deterioration of display frame.
Summary of the invention
In view of the foregoing, purpose of the present invention just provides a kind of image calibrating circuit of flat-panel screens, so that the image contrast that flat-panel screens is exported can not change along with the working temperature of display.
Another object of the present invention provides a kind of flat-panel screens, and it can keep certain output image contrast under the working temperature that changes.
A further object of the present invention provides a kind of method for correcting image of flat-panel screens, when changing with the working temperature in flat-panel screens, keeps certain output image contrast.
The present invention proposes a kind of image calibrating circuit of flat-panel screens, mainly is made of D/A conversion unit and data processing unit.Wherein, D/A conversion unit comprises temperature sensor and gamma voltage generator, and gamma voltage generator is in order to producing a plurality of gamma voltages, and temperature sensor is electrically connected to gamma voltage generator, in order to the working temperature of sensing gamma voltage generator.
From the above, data processing unit is electrically connected to D/A conversion unit, in order to temperature that the foundation temperature sensor sensed and export a plurality of numerical datas to D/A conversion unit, and D/A conversion unit promptly is to export corresponding gamma voltage according to these numerical datas.
The present invention proposes a kind of flat-panel screens, mainly is made of display panel, display driver unit, time schedule controller, D/A conversion unit and data processing unit.Wherein, the display driver unit is electrically connected to display panel, and time schedule controller is electrically connected to the display driver unit, in order to drive the display driver unit.In addition, D/A conversion unit is electrically connected to the display driver unit, and described D/A conversion unit and the data processing unit of this D/A conversion unit and data processing unit and preamble is identical, and D/A conversion unit exports gamma voltage to the display driver unit.
In preferred embodiment of the present invention, above-mentioned data processing unit for example is that (dynamic gamma correction, DGC) unit, first buffer (register) and second buffer constitute by the dynamic gamma correction.Wherein, first buffer and second buffer for example are ROM (read-only memory).The dynamic gamma correcting unit for example is in order to reception and analyzes the picture signal that inputs to display, and produces suitable gamma characteristic curve according to its analysis result.The gamma voltage that above-mentioned data processing unit is exported promptly is corresponding this gamma characteristic curve.First buffer is in order to storing a plurality of first control codes, and these first control codes correspond respectively to one in the above-mentioned gamma voltage.In addition, second buffer is then in order to storing a plurality of second control codes, and these second control codes also are one that corresponds respectively in the above-mentioned gamma voltage.
From the above, D/A conversion unit for example is the temperature that senses according to temperature sensor, be electrically connected in selecting one between first buffer and second buffer, receiving these first control codes or these second control codes, and according to its first received control code or second control code and export gamma voltage.
In preferred embodiment of the present invention, above-mentioned data processing unit can also comprise on-off controller, is electrically connected between the D/A conversion unit and first buffer, second buffer.This on-off controller is in order to optionally being electrically connected the D/A conversion unit and first buffer, or the D/A conversion unit and second buffer.
In preferred embodiment of the present invention, above-mentioned display panel for example is a display panels.
In preferred embodiment of the present invention, above-mentioned display driver unit for example is to comprise scan line driver and datawire driver, and this scan line driver is to be electrically connected with display panel respectively with datawire driver.
The present invention also proposes a kind of method for correcting image of flat-panel screens, and the method receives view data earlier, then analyzes this view data, to produce the gamma characteristic curve.Then, produce and store a plurality of first control codes and second control code.Wherein, these first control codes and second control code correspond respectively to a plurality of gamma voltages.Afterwards, select these first control codes or second control code, and according to selected these first control codes or second control code, and export the gamma voltage of its correspondence.
Embodiment according to the present invention is described, wherein before selecting these first control codes or second control code, also comprise the sensing working temperature, and in this embodiment, the method for above-mentioned image rectification for example is to select first control code or second control code according to this working temperature.
The present invention is along with the numerical data of output gamma voltage institute foundation is adjusted in the variation of working temperature, so that after receiving same view data, export identical gamma voltage under different temperatures.Hence one can see that, and the contrast of the output picture of the present invention's flat-panel screens can't be subjected to the influence of working temperature, thereby have more stable display quality.
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 circuit block diagram of known gamma voltage generator.
Fig. 2 is the flow chart of steps of the method for correcting image of the present invention's preferred embodiment midplane display.
Fig. 3 is the circuit block diagram of the present invention's embodiment midplane display.
Fig. 4 is under the room temperature and be higher than under the temperature of room temperature, first control code with its graph of relation of corresponding magnitude of voltage.
The main element description of symbols
100,322: gamma voltage generator
102: resistance string
104: selector switch
106: partial pressure unit
300: flat-panel screens
301: image calibrating circuit
302: display panel
304: time schedule controller
310: the display driver unit
312: datawire driver
314: scan line driver
320: D/A conversion unit
324: temperature sensor
330: data processing unit
332: the dynamic gamma correcting unit
334: the first buffers
336: the second buffers
338: on-off controller
S200: receive view data
S202: the gray-scale distribution of analysis of image data, to produce the gamma characteristic curve
S204: produce and store a plurality of first control codes and second control code
S205: sensing working temperature
S206: select first control code or second control code, and export corresponding gamma voltage according to selected first control code or second control code
Embodiment
The image calibrating circuit design of flat-panel screens of the present invention has the temperature sensor in order to the working temperature of sensing gamma voltage generator, so that along with the voltage that each control code corresponds to is proofreaied and correct in the variation of the working temperature of gamma voltage generator, and then make the output image contrast of flat-panel screens can not be subjected to the influence of the variation of working temperature.Below will the present invention be described, but it is not that the person of ordinary skill in the field can do modification to following embodiment slightly according to the present invention's spirit in order to qualification the present invention, but it still belongs to the present invention's scope for embodiment.
Fig. 2 is the flow chart of steps of the method for correcting image of the present invention's preferred embodiment midplane display.Please refer to Fig. 2, at first carry out step S200, to receive view data.Then carry out step S202,, and then produce suitable gamma characteristic curve with the gray-scale distribution of the view data that received in the analytical procedure 200.Then, as described in step S204, produce and store a plurality of first control codes and second control code.Wherein, these first control codes and second control code correspond to gamma voltage respectively, and these gamma voltages then correspond to the gamma characteristic curve that step S202 is produced., as described in step S206, between first control code and second control code, elect thereupon, and export corresponding gamma voltage, come display frame with the view data that foundation step S200 is received according to selected first control code or second control code.
Please continue to what deserves to be mentioned is that the present invention also comprised and carries out step S205 earlier, with the sensing working temperature before carrying out step S206 with reference to Fig. 2.Afterwards in step S206, it for example is the temperature that senses according to step S205 and select first control code or second control code.For instance,, in step S206, promptly select first control code, and export gamma voltage according to first control code if the temperature that step S205 is sensed is a room temperature.Otherwise, if the temperature that step S205 is sensed is higher or lower than room temperature, in step S206, then select second control code, and export gamma voltage according to second control code.
From the above, the present invention's method for correcting image is along with the control code of exporting gamma voltage institute foundation is adjusted in the variation of working temperature, so that this flat-panel screens can stably be exported gamma voltage under different working temperatures.For making the person of ordinary skill in the field understand above-mentioned method for correcting image more, below the circuit of the method for correcting image of carrying out above-mentioned flat-panel screens will be described for embodiment, but it is not in order to limit the present invention.
Fig. 3 is the circuit block diagram of the present invention's embodiment midplane display.Please refer to Fig. 3, flat-panel screens 300 mainly is made of display panel 302, display driver unit 310, time schedule controller 304, D/A conversion unit 320 and data processing unit 330.Wherein, display panel 302 for example is a display panels, display driver unit 310 is electrically connected to display panel 302, and it is made of datawire driver 312 and scan line driver 314, and time schedule controller 304 then is electrically connected to datawire driver 312 and scan line driver 314.
From the above, scan line driver 312 is control signals of exporting according to time schedule controller 304 and drive each sweep trace (not shown) of display panels 302 one by one, and then the control signal of being exported according to time schedule controller 304 by datawire driver 312, and export the gamma voltage that D/A conversion unit 320 is exported each data line (not shown) of display panel 302 to, with display image on display panel 302.
Please continue with reference to Fig. 3, D/A conversion unit 320 promptly is the image calibrating circuit 301 of flat-panel screens 300 with data processing unit 330.Wherein, D/A conversion unit 320 is electrically connected to display driver unit 310, and D/A conversion unit 320 mainly is made of gamma voltage generator 322 and temperature sensor 324.At this, gamma voltage generator 322 for example is the gamma voltage generator 100 similar in appearance to Fig. 1, and temperature sensor 324 is electrically connected to gamma voltage generator 322, in order to the working temperature of sensing gamma voltage generator 322.More specifically, temperature sensor 324 is in order to the working temperature of the resistance string of sensing gamma voltage generator 322 inside, so that the working temperature that is sensed according to temperature sensor 324 is estimated the change in resistance of resistance string.
In addition, data processing unit 330 is electrically connected to D/A conversion unit 320, in order to export a plurality of numerical datas to D/A conversion unit 320.And data processing unit 330 is made of dynamic gamma correcting unit 332, first buffer 334 and second buffer 336.Wherein, first buffer 334 and second buffer 336 for example be ROM (read-only memory) (read onlymemory, ROM).
After view data inputs to data processing unit 330, dynamic gamma correcting unit 332 carries out the contrast analysis to this view data earlier, produce the gamma characteristic curve again according to analysis result, and the gamma voltage that gamma voltage generator 322 is exported promptly is corresponding to this gamma characteristic curve.Hence one can see that, and data processing unit 330 is adjusted the gamma characteristic curve according to the contrast distribution situation of each view data, so that picture black partially or partially certainly can have preferable light and shade contrast, and then improves display quality.
Referring again to Fig. 3, after D/A conversion unit 320 is feedback the temperature that senses to data processing unit 330, data processing unit 330 according to temperature that temperature sensor 324 sensed and output digital data to D/A conversion unit 320.Further, data processing unit 330 exports these numerical datas a plurality of selector switchs (as the selector switch 104 of Fig. 1) of gamma voltage generator 322 to respectively, so that gamma voltage generator 322 is exported gamma voltage according to these numerical datas.
From the above, the numerical data that data processing unit 330 is exported for example is to comprise a plurality of first control codes that are stored in first buffer 334, and a plurality of second control codes that are stored in second buffer 336.In a preferred embodiment, data processing unit 330 for example is to export first control code to D/A conversion unit 320 under room temperature.Otherwise when the working temperature of gamma voltage generator 322 changed (for example being to be higher than room temperature), 330 of data processing units exported second control code to D/A conversion unit 320.Wherein, data processing unit 330 for example is to select to export first control code or second control code by on-off controller 338.That is to say, data processing unit 330 is electrically connected to D/A conversion unit 320 by on-off controller 338, and at room temperature, on-off controller 338 is electrically connected between first buffer 334 and the D/A conversion unit 320, to export first control code to D/A conversion unit 320.When temperature sensor 324 is feedback when the signal of on-off controller 338 shows that the working temperature of gamma voltage generator 322 changes, on-off controller 338 will switch to and be electrically connected between second buffer 336 and the D/A conversion unit 320, to export second control code to D/A conversion unit 320.
In more detail, the pairing gamma voltage of first control code is the at room temperature predetermined magnitude of voltage of exporting, and owing to the resistance of the resistance string of gamma voltage generator 322 can change along with working temperature, so when the working temperature of gamma voltage generator 322 changed, the pairing gamma voltage of these first control codes no longer was original magnitude of voltage of predetermined output at room temperature.Fig. 4 is under the room temperature and be higher than under the temperature of room temperature, first control code with its graph of relation of corresponding magnitude of voltage.Please refer to Fig. 4, for instance, suppose that first control code and second control code are 3 control code, and at room temperature first control code " 100 " corresponds to gamma voltage V
1After the working temperature of gamma voltage generator 322 changed, first control code " 100 " corresponded to gamma voltage V
1'.
Please referring again to Fig. 3, at this moment, data processing unit 330 will be selected second control code in output second buffer 336, and these second control codes also are the magnitude of voltage of predetermined output under the room temperature at pairing gamma voltage under the non-room temperature.In other words, when the working temperature of gamma voltage generator 322 changes, data processing unit 330 will be exported the selector switch of these second control codes to gamma voltage generator 322, so that its selected magnitude of voltage is still identical with the at room temperature selected magnitude of voltage of first control code.For instance, be higher than under the working temperature of room temperature, data processing unit 330 for example is that output corresponds to gamma voltage V
1Second control code " 110 ", as shown in Figure 4.
In sum, the present invention is the temperature of coming to be built in the sensing gamma voltage reference resistance string in the integrated circuit by temperature sensor.Thus, even resistance string because of temperature variation the phenomenon of resistance drift takes place, the present invention also can proofread and correct the numerical data of output gamma voltage institute foundation according to the temperature that senses, with default gamma voltage under the output room temperature.In other words, the present invention is along with the numerical data of output gamma voltage institute foundation is adjusted in the variation of working temperature, so that after receiving same view data, still exportable identical gamma voltage under different temperatures.Hence one can see that, and the contrast of the output picture of the present invention's flat-panel screens can't be subjected to the influence of working temperature, thereby have more stable display quality.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (11)
1. the image calibrating circuit of a flat-panel screens is characterized in that comprising:
D/A conversion unit comprises:
Gamma voltage generator is suitable for producing a plurality of gamma voltages;
Temperature sensor is electrically connected to this gamma voltage generator, is suitable for the working temperature of this gamma voltage generator of sensing; And
Data processing unit, be electrically connected to this D/A conversion unit, and this data processing unit is according to temperature that this temperature sensor sensed and export a plurality of numerical datas to this D/A conversion unit, this D/A conversion unit is exported corresponding gamma voltage according to these numerical datas, wherein these numerical datas comprise a plurality of first control codes and a plurality of second control code, each first control code is corresponding to a gamma voltage in these gamma voltages, and each second control code is corresponding to a gamma voltage in these gamma voltages.
2. according to the image calibrating circuit of the described flat-panel screens of claim 1, it is characterized in that this data processing unit comprises:
The dynamic gamma correcting unit is suitable for producing the gamma characteristic curve, and above-mentioned these gamma voltages are corresponding to this gamma characteristic curve;
First buffer stores above-mentioned these first control codes; And
Second buffer, store above-mentioned these second control codes, and this D/A conversion unit is according to temperature that this temperature sensor sensed, be electrically connected in selecting one between this first buffer and this second buffer, receiving above-mentioned these first control codes or above-mentioned these second control codes, and state these first control codes or second control code on receiving according to this D/A conversion unit and export above-mentioned these gamma voltages.
3. according to the image calibrating circuit of the described flat-panel screens of claim 2, it is characterized in that this data processing unit also comprises on-off controller, be electrically connected between this D/A conversion unit and this first buffer, this second buffer, in order to optionally to be electrically connected this D/A conversion unit and this first buffer or this D/A conversion unit and this second buffer.
4. according to the image calibrating circuit of the described flat-panel screens of claim 2, it is characterized in that this first buffer and this second buffer are respectively ROM (read-only memory).
5. flat-panel screens is characterized in that comprising:
Display panel;
The display driver unit is electrically connected to this display panel;
Time schedule controller is electrically connected to this display driver unit, to drive this display driver unit;
D/A conversion unit is electrically connected to this display driver unit, and this D/A conversion unit comprises:
Gamma voltage generator is suitable for producing a plurality of gamma voltages;
Temperature sensor is electrically connected to this gamma voltage generator, is suitable for the working temperature of this gamma voltage generator of sensing; And
Data processing unit, be electrically connected to this D/A conversion unit, and this data processing unit is according to temperature that this temperature sensor sensed and export a plurality of numerical datas to this D/A conversion unit, this D/A conversion unit is exported corresponding gamma voltage to this display driver unit according to these numerical datas, wherein these numerical datas comprise a plurality of first control codes and a plurality of second control code, each first control code is corresponding to a gamma voltage in these gamma voltages, and each second control code is corresponding to a gamma voltage in these gamma voltages.
6. the flat-panel screens according to claim 5 is characterized in that this data processing unit comprises:
The dynamic gamma correcting unit is suitable for producing the gamma characteristic curve, and above-mentioned these gamma voltages are corresponding to this gamma characteristic curve;
First buffer stores above-mentioned these first control codes; And
Second buffer, store above-mentioned these second control codes, and this D/A conversion unit is according to temperature that this temperature sensor sensed, be electrically connected in selecting one between this first buffer and this second buffer, receiving above-mentioned these first control codes or above-mentioned these second control codes, and state these first control codes or second control code on receiving according to this D/A conversion unit and export above-mentioned these gamma voltages.
7. the flat-panel screens according to claim 6, it is characterized in that this data processing unit also comprises on-off controller, be electrically connected between this D/A conversion unit and this first buffer, this second buffer, in order to optionally to be electrically connected this D/A conversion unit and this first buffer or this D/A conversion unit and this second buffer.
8. the flat-panel screens according to claim 6 is characterized in that this first buffer and this second buffer are respectively ROM (read-only memory).
9. the flat-panel screens according to claim 5 is characterized in that this display panel is a display panels.
10. the flat-panel screens according to claim 5 is characterized in that this display driver unit comprises scan line driver and datawire driver, is electrically connected with this display panel respectively.
11. the method for correcting image of a flat-panel screens is characterized in that comprising:
Receive view data;
Analyze the gray-scale distribution of this view data, to produce the gamma characteristic curve;
Generation also stores a plurality of first control codes and a plurality of second control code, and wherein above-mentioned these first control codes and above-mentioned these second control codes correspond respectively to a plurality of gamma voltages;
The sensing working temperature is selected above-mentioned these first control codes or above-mentioned these second control codes according to this working temperature; And
Export its pairing above-mentioned these gamma voltages according to selected above-mentioned these first control codes or above-mentioned these second control codes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9093244B2 (en) | 2007-04-16 | 2015-07-28 | Silicon Works Co., Ltd. | Method for routing gamma voltages in flat panel display |
| KR100850497B1 (en) * | 2007-04-16 | 2008-08-05 | 주식회사 실리콘웍스 | A gamma buffer arrangement method and plat panel display using the method |
| KR100861921B1 (en) * | 2007-05-11 | 2008-10-09 | 삼성전자주식회사 | Source line driver and method for controlling slew rate of output signal according to temperature, and display device having the same |
| CN101388168B (en) * | 2007-09-10 | 2010-12-15 | 中华映管股份有限公司 | Time schedule controller, display device and method for regulating gamma voltage |
| CN101707050B (en) * | 2009-12-01 | 2012-08-08 | 福建华映显示科技有限公司 | Gamma voltage selecting method of liquid crystal display (LCD) device |
| TWI436337B (en) | 2010-06-30 | 2014-05-01 | Sipix Technology Inc | Electrophoretic display and driving method thereof |
| CN105632449B (en) * | 2016-04-06 | 2018-04-10 | 京东方科技集团股份有限公司 | The gamma electric voltage adjusting method and device of a kind of display panel |
| CN106098013A (en) * | 2016-08-23 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of driving method showing module and driving means, display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06261228A (en) * | 1993-03-08 | 1994-09-16 | Hitachi Ltd | Gamma correction circuit |
| JPH10123485A (en) * | 1996-10-23 | 1998-05-15 | Toshiba Corp | Liquid crystal display device |
| JP2003295158A (en) * | 2002-03-29 | 2003-10-15 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| JP2004264695A (en) * | 2003-03-03 | 2004-09-24 | Victor Co Of Japan Ltd | Image display device |
| CN1584968A (en) * | 1999-11-05 | 2005-02-23 | 精工爱普生株式会社 | Deriving device IC, electric optical appliance and electronic apparatus |
| JP2005121767A (en) * | 2003-10-15 | 2005-05-12 | Matsushita Electric Ind Co Ltd | Matrix type display apparatus and driving method of the same |
-
2005
- 2005-09-07 CN CNB2005100986609A patent/CN100442331C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06261228A (en) * | 1993-03-08 | 1994-09-16 | Hitachi Ltd | Gamma correction circuit |
| JPH10123485A (en) * | 1996-10-23 | 1998-05-15 | Toshiba Corp | Liquid crystal display device |
| CN1584968A (en) * | 1999-11-05 | 2005-02-23 | 精工爱普生株式会社 | Deriving device IC, electric optical appliance and electronic apparatus |
| JP2003295158A (en) * | 2002-03-29 | 2003-10-15 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| JP2004264695A (en) * | 2003-03-03 | 2004-09-24 | Victor Co Of Japan Ltd | Image display device |
| JP2005121767A (en) * | 2003-10-15 | 2005-05-12 | Matsushita Electric Ind Co Ltd | Matrix type display apparatus and driving method of the same |
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