CN101231810A - Frequency regulation circuit, method and display apparatus containing frequency regulation circuit - Google Patents
Frequency regulation circuit, method and display apparatus containing frequency regulation circuit Download PDFInfo
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- CN101231810A CN101231810A CNA2008100805255A CN200810080525A CN101231810A CN 101231810 A CN101231810 A CN 101231810A CN A2008100805255 A CNA2008100805255 A CN A2008100805255A CN 200810080525 A CN200810080525 A CN 200810080525A CN 101231810 A CN101231810 A CN 101231810A
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Abstract
The invention provides a frequency adjustment circuit, a method thereof and a display device containing the frequency adjustment circuit. The display device is used for displaying frames, which comprises the frequency adjustment circuit, a source electrode drive circuit and a display panel. The frequency adjustment circuit stores the frames in a plurality of display blocks, and calculates the average of the gray scales of the display blocks. A plurality of control signals are output based on the comparison of the average of the gray scales with at least one threshold. The source electrode drive circuit adjusts the frequency of common electrodes of the display blocks according to the control signal. Finally, the display panel displays the display blocks according to the adjusted frequency of the common electrode signal. The invention has the advantages of low power consumption and high quality of displayed images.
Description
Technical field
The present invention relates to a kind of frequency regulating circuit, method and comprise the display device of this frequency regulating circuit; In more detail, relate to a kind of common electrode signal that can dynamically adjust source electrode drive circuit frequency frequency regulating circuit, method and comprise the display device of this frequency regulating circuit.
Background technology
In recent years, the development of flat-panel screens is more and more rapider, has replaced traditional cathode-ray tube display gradually.Flat-panel screens now mainly contains following several: organic light emitting diode display (Organic Light-Emitting Diodes Display; OLED), plasma scope (PlasmaDisplay Panel; PDP), LCD (Liquid Crystal Display; LCD) and Field Emission Display (Field Emission Display; FED) etc.Wherein advantages such as special because its low power consumption of LCD, frivolous and high-res become the main flow of consumer display now already.
Moreover, more because the quick progress of the manufacturing technology of LCD, LCD has had many advantages, for example light, thin, power saving and low radiation etc.Because above-mentioned characteristic, LCD is widely used on the electronic product miscellaneous already, for example personal digital assistant (PersonalDigital Assistant; PDA), laptop, digital camera, digital camera, mobile phone, computer screen and LCD TV etc.
For further satisfy difference of all kinds towards demand, for example better display quality or lower power consumption etc.The type of drive of numerous species, for example line counter-rotating (Line Inversion) type of drive or field reversal (frame Inversion) type of drive etc. all are developed in succession and are used by LCD manufacturer.Yet, more than these modes all still have separately shortcoming.
For instance,, can meet the demand that mobile device shows, but so and caused the not good cost of image display quality though that the applied field inversion driving mode carries out the LCD power consumption that picture shows is enough low.Though carry out the LCD that picture shows and have preferable image display quality and use the line inversion driving mode, yet but its bigger power consumption becomes a big shortcoming, and then the problem that is difficult to overcome such as generation power consumption.
In sum, make a kind of display device that has low power consumption concurrently and possess good image display quality, in fact the target of demanding urgently making great efforts for industry.
Summary of the invention
Based on the problem that aforementioned prior art faced, one object of the present invention is to provide a kind of display device, and it is in order to display frame.Display device comprises frequency regulating circuit, source electrode drive circuit and display panel in order to display frame.Frequency regulating circuit also calculates the grey scale average value that respectively shows block with picture respectively with a plurality of demonstration block stores, and exports a plurality of control signals according to the comparative result of described a plurality of grey scale average value and at least one threshold value.Source electrode drive circuit shows the frequency of the common electrode signal of block according to the control signal adjustment.At last, display panel shows this a plurality of demonstration blocks according to the frequency of adjusted common electrode signal.
In more detail, above-mentioned frequency regulating circuit also comprises storage unit and core processing unit.This storage unit in order to receive this picture and with this picture with a plurality of demonstration block stores.This core processing unit calculates the respectively grey scale average value of this demonstration block respectively, and with the grey scale average value of described a plurality of demonstration blocks respectively with threshold ratio to produce a plurality of comparative results.
Above-mentioned core processing unit can illustrate a plurality of control signals according to described a plurality of comparative results.
Another object of the present invention then is to provide a kind of frequency adjusting method, in order to adjust the frequency of common electrode signal.This method comprises the following step: receive picture, this picture comprises a plurality of demonstration blocks, and respectively this demonstration block all comprises a plurality of pixel datas; With the described a plurality of pixel datas of described a plurality of demonstration block stores; Calculate the respectively grey scale average value of this demonstration block respectively according to described a plurality of pixel datas; And with the grey scale average value of described a plurality of demonstration blocks respectively with first threshold relatively.And adjust according to aforesaid described a plurality of comparative results corresponding to the frequency of this common electrode signal of this demonstration block respectively, respectively this demonstration block then further shows according to the frequency of described adjusted common electrode signal.
In the above-mentioned frequency adjusting method,, also can comprise the following step: export first control signal when the grey scale average value of a plurality of demonstration blocks described in described a plurality of comparative results during greater than this first threshold; And
According to this first control signal, will be adjusted into first frequency corresponding to this frequency that shows this common electrode signal of block; Wherein, this demonstration block shows according to this first frequency.
In the above-mentioned frequency adjusting method, when the grey scale average value of a plurality of demonstration blocks described in described a plurality of comparative results is not more than this first threshold, also can comprise the following step: export second control signal; And, will be adjusted into second frequency corresponding to this frequency that shows this common electrode signal of block according to this second control signal; Wherein, this demonstration block shows according to this second frequency.
Above-mentioned frequency adjusting method also can comprise the following step: with the grey scale average value of described a plurality of demonstration blocks respectively with second threshold ratio.
Above-mentioned frequency adjusting method also can comprise the following step: when the grey scale average value of described a plurality of demonstration blocks is not more than this first threshold and during greater than this second threshold value, exports second control signal; And, will be adjusted into second frequency corresponding to this frequency that shows this common electrode signal of block according to this second control signal; Wherein, this demonstration block shows according to this second frequency.
Above-mentioned frequency adjusting method also can comprise the following step: when the grey scale average value of described a plurality of demonstration blocks is not more than this second threshold value, export the 3rd control signal; And, will be adjusted into the 3rd frequency corresponding to this frequency that shows this common electrode signal of block according to the 3rd control signal; Wherein, this demonstration block shows according to the 3rd frequency.
In the above-mentioned frequency adjusting method, this second frequency can be the predeterminated frequency of this common electrode signal.
A further object of the present invention then is to provide a kind of frequency regulating circuit, in order to adjust the frequency of common electrode signal.This frequency regulating circuit comprises: storage unit, have the picture of a plurality of pixel datas in order to reception, and with described a plurality of pixel datas with a plurality of demonstration block stores; And core processing unit, in order to calculating the grey scale average value of described a plurality of demonstration blocks, and with this grey scale average value and first threshold comparison to produce a plurality of comparative results; Wherein, corresponding to the frequency that respectively should show this common electrode signal of block, and respectively this demonstration block shows according to the frequency of described adjusted common electrode signal this core processing unit according to described a plurality of comparative result adjustment.
In the above-mentioned frequency regulating circuit, this core processing unit also can be with this grey scale average value and second threshold ratio.
The present invention analyzes in the picture the different grey scale average value that show blocks, and these are shown the grey scale average value of blocks and various threshold ratio.Adjust in the picture the different frequencies that show the common electrode signal of blocks in view of the above, realize having low power consumption in the mode of the frequency of dynamic adjustment common electrode signal, and possess the target of the display device of good image display quality simultaneously.
Behind the embodiment of consulting accompanying drawing and describing subsequently, those of ordinary skills just can understand other purposes of the present invention, and technological means of the present invention and embodiment.
Description of drawings
Fig. 1 is the synoptic diagram of first embodiment of the invention;
Fig. 2 is the frequency diagram of shown picture of the display panel of first embodiment 21 and common electrode signal; And
Fig. 3 is the process flow diagram of second embodiment of the invention.
Wherein, description of reference numerals is as follows:
1: liquid crystal indicator 10: picture data
11: grid controller 12: gate drive signal
13: 14: the first control signals of gate driver circuit
15: 16: the second control signals of frequency regulating circuit
17: 18: the three control signals of source electrode drive circuit
19: display panel 151: storage unit
153: core processing unit 20,22,24: the frequency waveform of common electrode signal
21: 211: the first blocks of picture
215: the three blocks of 213: the second blocks
Embodiment
The first embodiment of the present invention is a kind of liquid crystal indicator 1 as shown in Figure 1, and it comprises grid controller 11, gate driver circuit 13, frequency regulating circuit 15, source electrode drive circuit 17 and display panel 19.Display panel 19 comprises a plurality of pixel (not shown).Grid controller 11 is in order to receive picture data 10, and picture data 10 comprises a plurality of pixel datas, and described a plurality of pixel datas promptly are input to the pixel of display panel 19 respectively, so that display panel 19 display frames.After grid controller 11 is handled picture data 10, will produce gate drive signal 12.Gate driver circuit 13 receives the Push And Release of gate drive signal 12 with the pixel of control display panel 19.The technical field of the invention those of ordinary skill is when operation and the function that can understand aforementioned grid controller 11 and gate driver circuit 13, so do not repeat them here.
Below will describe core processing unit 153 in detail and how to export control signal according to the grey scale average value of difference demonstration block.Core processing unit 153 with these different grey scale average value that show blocks and threshold ratio.For instance, (0 rank～63 rank) then can be considered as the first threshold (not shown) with the 56th GTG for 6 bit data; And just the 8th GTG is considered as the second threshold value (not shown).
As shown in Figure 2, it is the frequency diagram of shown picture of display panel 21 and common electrode signal.In the present embodiment, picture 21 is divided into three and shows block 211,213,215, and storage unit 151 is stored these pixel datas that shows block 211,213,215 respectively.Of particular note, the present invention does not limit the number that shows block in the picture 21, and present technique field those of ordinary skill can increase the number that shows block in the picture 21 on demand, so do not repeat them here.Subsequently, core processing unit 153 calculates these grey scale average value that shows blocks 211,213,215 respectively, and will show that the grey scale average value of block 211 and first threshold and second threshold value compare; To show that the grey scale average value of block 213 and first threshold and second threshold value compare; To show that again the grey scale average value of block 215 and first threshold and second threshold value compare.
All fall between first threshold (the 56th GTG) and second threshold value (the 8th GTG) if show the grey scale average value of block 211,213,215, core processing unit 153 outputs second control signal 16 is to source electrode drive circuit 17.Source electrode drive circuit 17 will be exported second control signal 16 to source electrode drive circuit 17, show that with all of control picture 21 frequency of the common electrode signal of blocks 211,213,215 is a second frequency.In view of the above, the frequency of the common electrode signal of picture 21 will be exported the kenel as waveform 20.
If the grey scale average value that shows block 211 is greater than first threshold (the 56th GTG); The grey scale average value that shows block 213 is less than second threshold value (the 8th GTG); And the grey scale average value that shows block 215 still falls between the first threshold and second threshold value.It is first frequency with the frequency of common electrode signal of the demonstration block 211 of control picture 21 that core processing unit 153 will be exported first control signal 14 to source electrode drive circuit 17; Exporting the 3rd control signal 18 to source electrode drive circuit 17 is the 3rd frequency with the frequency of common electrode signal of the demonstration block 213 of control picture 21; Is second frequency and export second control signal 16 to source electrode drive circuit 17 with the frequency of demonstration block 215 of control picture 21.In view of the above, the frequency of the common electrode signal of picture 21 will be exported the kenel as waveform 22.And the first frequency of the common electrode signal of demonstration block 211 is less than the second frequency of the common electrode signal that shows block 215; And the second frequency of the common electrode signal of demonstration block 215 is less than the 3rd frequency of the common electrode signal that shows block 213.
The grey scale average value that and for example shows block 211 falls between first threshold (the 56th GTG) and second threshold value (the 8th GTG), and the grey scale average value of demonstration block 213,215 is all less than second threshold value.It is second frequency with the frequency of common electrode signal of the demonstration block 211 of control picture 21 that core processing unit 153 will be exported second control signal 16 to source electrode drive circuit 17, and to export the 3rd control signal 18 to source electrode drive circuit 17 be the 3rd frequency with the frequency of the common electrode signal of the demonstration block 213,215 of control picture 21.In view of the above, the frequency of the common electrode signal of picture 21 will be exported the kenel as waveform 24.
Need to prove at this, can have certain relation between first frequency, second frequency and the 3rd frequency, for example the numerical value of second frequency can be first frequency numerical value 2 Nth power doubly, or the numerical value of second frequency can be first frequency numerical value 2 Nth power doubly, wherein N is a positive integer.Second frequency then is the predeterminated frequency of common electrode signal.Though among first embodiment, the grey scale average value that core processing unit 153 will show block 211,213,215 respectively with first threshold and second threshold ratio, carry out the dynamic adjustment of the frequency of common electrode signal with three intervals.But the present invention does not limit the number of threshold value in the core processing unit 153.In other words, core processing unit of the present invention can only compare the grey scale average value that shows block with first threshold, or only with second threshold ratio, carry out the dynamic adjustment of the frequency of common electrode signal with two intervals, this technical field those of ordinary skill can be directly acquainted with liquid crystal indicator 1 of the present invention according to the described explanation of leading portion and how carry out this operation and function, so do not repeat them here.
The second embodiment of the present invention is a kind of frequency adjusting method of adjusting the frequency of common electrode signal in display device as shown in Figure 3, and this display device can be the liquid crystal indicator 1 described in first embodiment.This method is described as follows.
During execution in step 301, receive picture, the described picture 21 of first embodiment for example, this picture comprises a plurality of demonstration blocks, and each shows that block all comprises a plurality of pixel datas.Then execution in step 303 is stored described a plurality of pixel data.Execution in step 305 again, calculate the respectively grey scale average value of this demonstration block respectively according to described a plurality of pixel datas.Execution in step 307 compares grey scale average value and the first threshold that shows block.Execution in step 309 again, and whether the grey scale average value of judging this demonstration block is greater than this first threshold.When this grey scale average value that shows block during greater than this first threshold, then execution in step 311, export first control signal.Execution in step 313 again, will show that according to this first control signal the frequency of the common electrode signal of block is adjusted into first frequency.
In step 309, when the grey scale average value of this demonstration block was not more than this first threshold, execution in step 315 showed the grey scale average value of block and second threshold ratio with this.Execution in step 317 again, and whether the grey scale average value of judging this demonstration block is greater than this second threshold value.When this grey scale average value that shows block during greater than this second threshold value, then execution in step 319, export second control signal.Execution in step 321 again, will show that according to this second control signal the frequency of the common electrode signal of block is adjusted into second frequency.
In step 317, when the grey scale average value of this demonstration block was not more than this second threshold value, execution in step 323 was exported the 3rd control signal.Execution in step 325 again, will show that according to the 3rd control signal the frequency of the common electrode signal of block is adjusted into the 3rd frequency.
Except above-mentioned steps, second embodiment can also carry out first embodiment the operation described and the function, under the technical field those of ordinary skill can be directly acquainted with second embodiment how based on above-mentioned first embodiment to carry out these operations and function, so do not repeat them here.
By the described explanation of leading portion, the height of the frequency of common electrode signal of the present invention can change arbitrarily, changes according to the content of image data in fact to display.Because human eye is comparatively responsive for the lower image of brightness, and is comparatively insensitive for the image that brightness is higher.So in the image that shows higher brightness (being that grey scale average value is higher), use the common electrode signal of lower frequency; And in the image that shows than low-light level (being that grey scale average value is lower), then use the common electrode signal of upper frequency.Whereby, in the image data that shows low-light level, use high-frequency common electrode signal, can obtain preferable image display quality; And in the exhibit high brilliance image data, use the common electrode signal of lower frequency, then can reach the effect of saving power consumption.
The above embodiments only are used for exemplifying embodiment of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting category of the present invention.Any the technical field of the invention those of ordinary skill can unlabored change or the arrangement of the equivalence scope that all belongs to the present invention and advocated, and interest field of the present invention should be as the criterion with claims.
Claims (11)
1. frequency adjusting method in order to adjust the frequency of common electrode signal, comprises the following step:
Receive picture, this picture comprises a plurality of demonstration blocks, and respectively this demonstration block all comprises a plurality of pixel datas;
Store described a plurality of pixel data, wherein said a plurality of pixel datas are with described a plurality of demonstration block stores;
According to described a plurality of pixel datas, calculate the grey scale average value that respectively should show block respectively; And
The grey scale average value of described a plurality of demonstration blocks is compared with first threshold respectively, to produce a plurality of comparative results;
Wherein, adjust according to described a plurality of comparative results corresponding to the frequency of this common electrode signal of this demonstration block respectively, respectively this demonstration block shows according to the frequency of described adjusted common electrode signal.
2. frequency adjusting method as claimed in claim 1 wherein when the grey scale average value of a plurality of demonstration blocks described in described a plurality of comparative results during greater than this first threshold, also comprises the following step:
Export first control signal; And
According to this first control signal, will be adjusted into first frequency corresponding to this frequency that shows this common electrode signal of block;
Wherein, this demonstration block shows according to this first frequency.
3. frequency adjusting method as claimed in claim 1 wherein when the grey scale average value of a plurality of demonstration blocks described in described a plurality of comparative results is not more than this first threshold, also comprises the following step:
Export second control signal; And
According to this second control signal, will be adjusted into second frequency corresponding to this frequency that shows this common electrode signal of block;
Wherein, this demonstration block shows according to this second frequency.
4. frequency adjusting method as claimed in claim 1 also comprises the following step:
With the grey scale average value of described a plurality of demonstration blocks respectively with second threshold ratio.
5. frequency adjusting method as claimed in claim 4 also comprises the following step:
When the grey scale average value of described a plurality of demonstration blocks is not more than this first threshold and during greater than this second threshold value, exports second control signal; And
According to this second control signal, will be adjusted into second frequency corresponding to this frequency that shows this common electrode signal of block;
Wherein, this demonstration block shows according to this second frequency.
6. frequency adjusting method as claimed in claim 4 also comprises the following step:
When the grey scale average value of described a plurality of demonstration blocks is not more than this second threshold value, export the 3rd control signal; And
According to the 3rd control signal, will be adjusted into the 3rd frequency corresponding to this frequency that shows this common electrode signal of block;
Wherein, this demonstration block shows according to the 3rd frequency.
7. frequency adjusting method as claimed in claim 6, wherein this second frequency is the predeterminated frequency of this common electrode signal.
8. frequency regulating circuit in order to adjust the frequency of common electrode signal, comprises:
Storage unit has the picture of a plurality of pixel datas in order to reception, and with described a plurality of pixel datas with a plurality of demonstration block stores; And
Core processing unit, in order to calculating the grey scale average value of described a plurality of demonstration blocks, and with this grey scale average value and first threshold comparison to produce a plurality of comparative results;
Wherein, corresponding to the frequency that respectively should show this common electrode signal of block, and respectively this demonstration block shows according to the frequency of described adjusted common electrode signal this core processing unit according to described a plurality of comparative result adjustment.
9. frequency regulating circuit as claimed in claim 8, wherein this core processing unit also with this grey scale average value and second threshold ratio.
10. display device comprises the picture of a plurality of pixel datas in order to demonstration, comprises:
Frequency regulating circuit also calculates the grey scale average value that respectively should show block with this picture respectively with a plurality of demonstration block stores, and exports a plurality of control signals according to described a plurality of grey scale average value;
Source electrode drive circuit is adjusted the frequency of the common electrode signal of described a plurality of demonstration blocks according to described a plurality of control signals; And
Display panel shows described a plurality of demonstration block according to the frequency of described adjusted common electrode signal.
11. display device as claimed in claim 10, wherein this frequency regulating circuit also comprises:
Storage unit, in order to receiving described a plurality of pixel data, and with described a plurality of pixel datas with described a plurality of demonstration block stores; And
Core processing unit calculates the respectively grey scale average value of this demonstration block respectively according to described a plurality of pixel datas, and with the grey scale average value of described a plurality of demonstration blocks respectively with the first threshold comparison to produce a plurality of comparative results;
Wherein, this core processing unit is exported a plurality of control signals according to described a plurality of comparative results.
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| CNB2008100805255A CN100555378C (en) | 2008-02-21 | 2008-02-21 | Frequency regulating circuit, method and comprise the display device of this frequency regulating circuit |
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| CNB2008100805255A CN100555378C (en) | 2008-02-21 | 2008-02-21 | Frequency regulating circuit, method and comprise the display device of this frequency regulating circuit |
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| CN104699438A (en) * | 2015-03-24 | 2015-06-10 | 深圳市华星光电技术有限公司 | Equipment and method for processing to-be-displayed picture of OLED (Organic Light Emitting Diode) displayer |
| CN106910487A (en) * | 2017-04-11 | 2017-06-30 | 武汉华星光电技术有限公司 | The driving method and drive device of a kind of display |
| CN109285506A (en) * | 2018-12-04 | 2019-01-29 | 惠科股份有限公司 | Display device and driving method and driving system thereof |
| CN110534065A (en) * | 2019-09-03 | 2019-12-03 | 京东方科技集团股份有限公司 | Display panel and its driving method, display module |
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| CN104699438A (en) * | 2015-03-24 | 2015-06-10 | 深圳市华星光电技术有限公司 | Equipment and method for processing to-be-displayed picture of OLED (Organic Light Emitting Diode) displayer |
| WO2016150004A1 (en) * | 2015-03-24 | 2016-09-29 | 深圳市华星光电技术有限公司 | Device and method for processing image to be displayed on oled display |
| CN104699438B (en) * | 2015-03-24 | 2018-01-16 | 深圳市华星光电技术有限公司 | The apparatus and method handled the picture to be shown of OLED display |
| CN106910487A (en) * | 2017-04-11 | 2017-06-30 | 武汉华星光电技术有限公司 | The driving method and drive device of a kind of display |
| WO2018188122A1 (en) * | 2017-04-11 | 2018-10-18 | 武汉华星光电技术有限公司 | Drive method and drive apparatus for display, and display |
| US10417952B2 (en) | 2017-04-11 | 2019-09-17 | Wuhan China Star Optoelectronics Technology Co., Ltd | Method for driving display device based on individual adjustment of grayscales of multiple display areas |
| CN109285506A (en) * | 2018-12-04 | 2019-01-29 | 惠科股份有限公司 | Display device and driving method and driving system thereof |
| CN110534065A (en) * | 2019-09-03 | 2019-12-03 | 京东方科技集团股份有限公司 | Display panel and its driving method, display module |
| CN110534065B (en) * | 2019-09-03 | 2021-05-11 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display module |
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