CN103151004A - Over-excitation driving adjustment method and system - Google Patents
Over-excitation driving adjustment method and system Download PDFInfo
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Abstract
An overdriving driving adjustment method and a system thereof, the overdriving driving adjustment method comprises the following steps: setting a color temperature value of at least one pixel, wherein the pixel is provided with a plurality of sub-pixels with different colors; measuring the overexcitation index of the sub-pixels; and adjusting the overexcitation indexes of the sub-pixels to the same target level.
Description
Technical field
The present invention relates to a kind of method of adjustment of display driver, and particularly relevant for too drastic driving (over-driving) method of adjustment and system thereof in a kind of display application.
Background technology
Traditionally, liquid crystal display the ghost situation usually easily occurs when showing dynamic menu, reason is that liquid crystal needs certain reaction time in the process that rotation is switched, when the dynamic menu content changes fast, just may be because of the liquid crystal rotation not as good as staying ghost.In order to solve such situation, generally all can use too drastic driving (Over-Driving, OD) display technique is solved, the driving signal that amplifies (comprising ascensional range amplification and fall amplifies) by applying deliberately improves the switch speed of the liquid crystal between adjacent pictures, make display just can reach fast desirable signal potential in the time at Picture switch, reduce ghost phenomena and occur.
General known too drastic driving display technique is to be undertaken by the mode of tabling look-up, according to contrast form (look-up table), find out the GTG value of each pixel between adjacent two pictures in the mobile object region, table look-up according to the GTG value of priority picture, find out the too drastic compensation GTG value that former demonstration GTG value must adopt in too drastic driving compensation situation, and find out corresponding too drastic index (OD index), then cover is used in the driving of pixel separately.In simple terms, too drastic index roughly represents and drive the multiplying power that signal must deliberately amplify when Picture switch.
The contrast form of traditional too drastic driving arranges the too drastic look-up table of gray scale variation between two pictures usually take single pixel as least unit.Yet, in practical application, usually comprise the corresponding different colours of sub-pixel difference more than three in single pixel, as red (R), green (G), blue three looks such as (B).If the too drastic index that only finds out with single too drastic index look-up table, as one man cover is used on the sub-pixel of three kinds of colors, the inconsistent situation of pace of change between different colours often can occur, i.e. the so-called look phenomenon of dragging.When dragging the look phenomenon to occur, it is obviously outstanding that the mobile object region may have part color (for example red), with other not harmonies of color-ratio, and color error ratio occurs.
Summary of the invention
For addressing the above problem, the present invention proposes a kind of too drastic driving method of adjustment and system thereof, and its a plurality of sub-pixels according to different colours in pixel calculate respectively too drastic index separately.In addition, adjusted the color temperature value of pixel as the user, when making the demonstration proportion of composing change between different colours (the yield value ratio as each color changes), the present invention is according to the color temperature value after setting, recomputate the too drastic index of each sub-pixel in pixel, the too drastic index of the sub-pixel of corresponding different colours is reached unanimity (all being adjusted to same target bit accurate).And after the color temperature value adjustment, the too drastic index of these sub-pixels of recomputating is remapped to the too drastic look-up table that remaps, dynamically adjust too drastic look-up table to complete according to the different-colour value.
Of the present invention one is exemplified as a kind of too drastic driving method of adjustment is provided, and comprises the following step: set the color temperature value of at least one pixel, have a plurality of sub-pixels of different colours in this pixel; Measure the too drastic index (OD index) of these sub-pixels; And, the too drastic index of these sub-pixels all is adjusted to same target bit accurate.
Of the present invention another is exemplified as provides a kind of too drastic driving adjustment System, comprises setup unit, measuring unit and adjustment unit.Setup unit has a plurality of sub-pixels of different colours in order to set the color temperature value of at least one pixel in this pixel.The too drastic index (OD index) of measuring unit in order to measure these sub-pixels.It is accurate that adjustment unit all is adjusted to same target bit in order to the too drastic index with these sub-pixels.
Description of drawings
For above and other purpose of the present invention, feature, advantage and embodiment can be become apparent, appended the description of the drawings is as follows:
Figure 1A and Figure 1B illustrate the method flow diagram according to a kind of too drastic driving method of adjustment in one embodiment of the invention;
Fig. 2 illustrates the schematic diagram according to a kind of too drastic driving adjustment System in one embodiment of the invention;
Fig. 3 illustrates the schematic diagram that changes waveform according to the brightness of each sub-pixels in one embodiment of the invention;
Fig. 4 A illustrates and according to an embodiment, a sub-pixels is wherein calculated the schematic diagram of too drastic index;
Fig. 4 B illustrates and according to another embodiment, a sub-pixels is wherein calculated the schematic diagram of too drastic index;
Fig. 4 C illustrates and according to another embodiment, two sub-pixels is wherein calculated the schematic diagram of too drastic indexes;
Fig. 4 D illustrates and according to another embodiment, two sub-pixels is wherein calculated the schematic diagram of too drastic indexes;
The too drastic index replacement that Fig. 5 illustrates when each sub-pixels changes the schematic diagram of waveform to the brightness of punctual each sub-pixels of same target bit;
Fig. 6 illustrates the former too drastic index of preset range, each sub-pixels and the relativeness figure of target bit standard; And
Fig. 7 illustrates a kind of schematic diagram of too drastic driving adjustment System.
Wherein, Reference numeral
100,300: too drastic driving adjustment System 120: test computer
140: display 160,162,342: OPTICAL SENSORS
180: oscillograph S100～S160: step
320: setup unit 340: measuring unit
344: computing module 360: adjustment unit
362: setting value module 364: the step adjusting module
370: map unit 380: storage element
390: display unit
Embodiment
The contrast form of traditional too drastic driving (Over-Driving, OD) arranges the too drastic index look-up table of gray scale variation between two pictures usually take single pixel as least unit.Yet, usually comprise the corresponding different colours of sub-pixel difference more than three in single pixel, as red (R), green (G), blue three looks such as (B).Only carry out too drastic compensation and as one man overlap and use on the sub-pixel of three kinds of colors with single too drastic look-up table, the inconsistent situation of pace of change between different colours often can occur, i.e. the so-called look phenomenon of dragging.Therefore, the present invention proposes a kind of too drastic driving method of adjustment, a plurality of sub-pixels of the different colours in corresponding single pixel are set up respectively different too drastic look-up table (OD table), such as three look too drastic look-up tables (RGB-OD tables) of three looks such as corresponding red, green, blue.
In addition, in the actual displayed example application, the display color ratio that a plurality of sub-pixels form can according to the user ' s preference Self-adjustment, be called again color temperature value or white balance.For instance, if user's wish is selected the warm colour system of inclined to one side dusk or Candle-sticks light, can tune to low color temperature value (as 1900 ° of K to 4500 ° of K), at this moment, the brightness ratio of red sub-pixel will improve relatively; If user's wish is selected the cool colour system of inclined to one side blue sky or daylight lamp, can tune to high color temperature value (as 6000 ° of K to 11000 ° of K), at this moment, the brightness ratio of blue subpixels will improve relatively.Yet too drastic index look-up table (OD table) or three looks too drastic look-up table (RGB-ODtables) in known technology are all pre-set fixed numbers, can't change and dynamically adjust by corresponding color temperature value.A plurality of too drastic look-up table that too drastic driving method of adjustment proposed by the invention and system thereof set up except the sub-pixel of the corresponding different colours of difference, and can change and dynamically adjust according to color temperature value.
See also Figure 1A, Figure 1B and Fig. 2, Figure 1A and Figure 1B illustrate the method flow diagram according to a kind of too drastic driving method of adjustment in one embodiment of the invention, and Fig. 2 illustrates the schematic diagram according to a kind of too drastic driving adjustment System 100 in one embodiment of the invention.Too drastic driving method of adjustment of the present invention can coordinate 100 operations of too drastic driving adjustment System, but not only is limited with the hardware configuration of this system, and any tool equality can be completed the implementation of step of the present invention all in the application's category.
As shown in Figure 2, too drastic driving adjustment System 100 has comprised test computer 120, display 140, OPTICAL SENSORS 160,162 and oscillograph 180.In this example, test computer 120 can be sent specific test pictures to display 140 and show, in Fig. 2, the test pictures that test computer 120 is sent comprises test section A1, but the brightness of OPTICAL SENSORS 160 sensing test section A1 and give oscillograph 180 with sensing result.
In addition, in this embodiment, the test pictures that test computer 120 is sent can further comprise trigger region A2, and trigger region A2 is at the sustainable display white picture of test period, representative is during at present test is carried out, but another OPTICAL SENSORS 162 sensing trigger region A2 and activate oscillograph 180 operations.That is to say that the trigger pip whether trigger region A2 representative is tested makes test computer 120, display 140 consistent with oscillograph 180 modes of operation.
As shown in Figure 1A, too drastic driving method of adjustment in this embodiment, at first execution in step S100 sets the color temperature value of at least one pixel.Single pixel comprises the sub-pixel of a plurality of different colours.In practical application, color temperature value represents sub-pixel ratio of all kinds in single pixel, as the relative scale of red (R), green (G), blue three looks such as (B), set color temperature value and can complete by adjusting red, green, blue yield value (gain) separately.For example, heighten the yield value of red (R), make color present the deflection warm colour; Or heighten the yield value of indigo plant (B) look, make color present the deflection cool colour.
In one embodiment, can be on test computer 120 the OSD adjustment interface of display 140 (or by) set the color temperature value of pixel, and send the test section A1 of test pictures to the display 140 based on this color temperature value.Then, execution in step S120 is to measure the too drastic index of sub-pixel (OD index) separately.What must replenish is, in this embodiment, the too drastic index measurement of sub-pixel is for successively sequentially carrying out separately, that is to say, order is successively carried out measurement respectively corresponding red (R), green (G) of three bouts, blue sub-pixels such as (B) successively, only drive the sub-pixel of single kind of color of test section each pixel of A1 with the time, with the independent measurement too drastic index of sub-pixel separately.
See also Fig. 3, its brightness that illustrates according to each sub-pixels in one embodiment of the invention changes waveform CR, the schematic diagram of CG and CB.
In this embodiment, as shown in Figure 1B, step S120 can be further divided into a plurality of substeps again, but execution in step S121 at first, utilize these sub-pixels brightness separately in OPTICAL SENSORS 160 difference sensing test section A1, OPTICAL SENSORS 160 can be different electric potential signals with these sub-pixels brightness transition separately that senses.Then, execution in step S122, test computer 120 changes the output GTG value of the sub-pixel in the A1 of test section, makes it be changed to target gray scale GLt by initial GTG GLi respectively.
Then, the display of the sub-pixel in the A1 of test section is changed in constant interval P2 between target gray scale GLt (corresponding target interval P3) by initial GTG GLi (P1 between corresponding sintering), the brightness of the sub-pixel of 160 sensings of OPTICAL SENSORS changes thereupon, execution in step S123, the brightness results (electric potential signal of corresponding brightness) of OPTICAL SENSORS 160 exporting changes interval institutes sensings and then produces the brightness separately of these sub-pixels and changes waveform to oscillograph 180.The corresponding brightness variation of each sub-pixels waveform (is changed in the time interval of target gray scale GLt by initial GTG GLi) in constant interval P2 and has transition curve separately.
As shown in Figure 3, different because of versicolor yield value under the different-colour value, in the display under the process preset mode after too drastic driving, the transition curve of versicolor sub-pixel with different, therefore just may cause dragging look when Picture switch.
Then, execution in step S124 according to the variation of this transition curve, calculates the too drastic index (OD index) of each sub-pixels, and its calculating has multiple implementation.In one embodiment, the calculating of the too drastic index of each sub-pixels (OD index) can be by signal potential sampling and the average generation of transition curve, see also Fig. 4 A, it illustrates and according to an embodiment, a sub-pixels is wherein calculated the schematic diagram of too drastic index.Step S124 can change waveform CR at constant interval P2 k the signal potential of taking a sample for the brightness of red sub-pixel, and k is positive integer.In Fig. 4 A, the brightness of red sub-pixel changes waveform CR and has taken a sample signal potential a1 to signal potential ak at constant interval P2, can average as the too drastic index (OD index) of sub-pixel to an above-mentioned k signal potential subsequently, in like manner other two sub-pixels are as the same.
See also Fig. 4 B, it illustrates and according to another embodiment, a sub-pixels is wherein calculated the schematic diagram of too drastic index.In the embodiment of Fig. 4 B, the brightness of calculating red sub-pixel changes the area value (as the area of hatched example areas AP2 in Fig. 4 B) of waveform CR in constant interval P2 as the too drastic index (OD index) of sub-pixel, and in like manner other two sub-pixels are as the same.
See also Fig. 4 C, it illustrates and according to another embodiment, two sub-pixels is wherein calculated the schematic diagram of too drastic indexes.in the embodiment of Fig. 4 C, the brightness of calculating red sub-pixel changes the tangent slope of brightness variation waveform CG on appropriate point (for example central point of voltage change) of waveform CR and green sub-pixels, this slope is the too drastic index (OD index) of sub-pixel, for example, the slope that brightness changes the tangent line SR of waveform CR on central point is namely as the too drastic index (OD index) of red sub-pixel, and the slope that brightness changes the tangent line SG of waveform CG on central point is namely as the too drastic index (OD index) of green sub-pixels, in like manner blue subpixels is as the same.
See also Fig. 4 D, it illustrates and according to another embodiment, two sub-pixels is wherein calculated the schematic diagram of too drastic indexes.in the embodiment of Fig. 4 D, the brightness that the brightness of calculating red sub-pixel changes waveform CR and green sub-pixels change waveform CG arrive specific potential (namely OPTICAL SENSORS 160 senses certain luminance) time of palpus be the too drastic index (OD index) of sub-pixel, for example, the time T R that the brightness of sub-pixel changes waveform CR institute palpus is namely as the too drastic index (OD index) of red sub-pixel, and the time T G that the brightness of sub-pixel changes waveform CG institute palpus is namely as the too drastic index (OD index) of green sub-pixels, in like manner blue subpixels is as the same.
after the calculating of the too drastic index of completing each sub-pixels (step S124), but just execution in step S140, control the too drastic compensation making of these sub-pixels according to the result feedback of the too drastic index of above-mentioned each sub-pixels, respectively the too drastic compensation making of the sub-pixel of three kinds of colors carried out feedback adjusting, until the too drastic index of sub-pixel all reaches unanimity (or gap in a permissible range) each other, namely accurate to same target bit the too drastic index replacement of each sub-pixels, see also Fig. 5, its too drastic index replacement to same target bit brightness of each sub-pixels on time that illustrates when each sub-pixels changes waveform CR, the schematic diagram of CG and CB.
Wherein, as shown in Figure 1B, step S140 can be divided into two sub-steps again, step S141 wherein, and the target setting position is accurate in a preset range, and preset range herein must contain the former too drastic index of each sub-pixels at present.In a preferred embodiment, can select minimum too drastic index (the namely the slowest person of pace of change) accurate as target bit by the former too drastic index of present each sub-pixels.See also Fig. 6, it illustrates the former too drastic index of preset range, each sub-pixels and the relativeness figure of target bit standard.As shown in Figure 6, suppose, preset range is between boundary value TH1 and boundary value TH2, preset range contains too drastic index OD1, OD2 and the OD3 of each sub-pixels at present, certainly also contains minimum value (being too drastic index OD1 in this example) and maximal value (being too drastic index OD3 in this example) in too drastic index.
In preferred embodiment, the minimum value of choosing in the too drastic index of each sub-pixels is accurate as target bit, and then, the too drastic index that execution in step S142, step adjust other two sub-pixels makes the minimum value in the too drastic index of its convergence.
The waveform of three sub-pixels can produce three kinds of too drastic indexes, after stipulating one group of target bit accurate (minimum value in former too drastic index), adjusted the numerical value of three sub-pixels outputs by test computer 120, allow three sub-pixels waveforms approach toward the target bit standard, each GTG is wanted independent adjustment, until adjust to the situation with congruence.
For the speed of accelerating to adjust, adopt step (step) adjustment in step S142, namely after each the adjustment, calculate the too drastic index variation amplitude of bringing of this time adjusting, what be namely with respect to the each amplitude of variation of adjusting of too drastic index, just can rough estimate arrive the target bit standard time or the number of times of palpus.
If when the inferior too drastic index variation amplitude too small (gap between relatively present too drastic index and target bit standard) of bringing of adjusting, amplify the amplitude of variation of adjusting, namely strengthen step (step) next time.If when the inferior too drastic index variation amplitude excessive (gap between relatively present too drastic index and target bit standard) of bringing of adjusting, dwindle the amplitude of variation of adjusting, namely dwindle step (step) next time.
At last, too drastic driving display technique is undertaken by the mode of tabling look-up usually, finds out according to the content of too drastic look-up table the GTG value setting that former GTG value must be exported under too drastic driving compensates, and applies mechanically the rear GTG value of compensation after tabling look-up according to the former GTG value of picture.If color temperature value resets, will cause the change of yield value of all kinds (as RGBgain).The GTG value of supposing original red sub-pixel is changed to 0～255 equipotential rank, and original too drastic look-up table records the contrast relationship between the GTG value of 255*255.After if color temperature value resets, the yield value of red sub-pixel is 0.5, and at this moment, it is only 0～127 that the GTG value of the red sub-pixel after color temperature value changes changes.If the relation according on original too drastic look-up table its rank when the picture wish is exported, has deviation, and then affects the situation of too drastic driving when original too drastic look-up table correspondence is tabled look-up.
Therefore, as shown in Figure 1A and Figure 1B, the further execution in step S160 of too drastic driving method of adjustment, the too drastic index of these sub-pixels after adjusting based on color temperature value remap (re-mapping) become to remap too drastic look-up table (re-mapped OD table).By the mode that interpolation is tabled look-up, allow too drastic driving numerical value find correct correspondence.For example: by too drastic driving numerical value current to be tried to achieve, the direct anti-too drastic driving numerical value of vicinity that pushes away original too drastic look-up table, the mode by interpolation calculates correct too drastic driving numerical value more afterwards.
In sum, the present invention proposes a kind of too drastic driving method of adjustment and calculates respectively separately too drastic index according to a plurality of sub-pixels of different colours in pixel, and can dynamically adjust too drastic look-up table according to the different-colour value.
See also Fig. 7, it illustrates a kind of schematic diagram of too drastic driving adjustment System 300.Too drastic driving adjustment System 300 can dynamically be adjusted in order to the setting to too drastic driving, and the method for adjustment of its execution can be with reference to previous embodiment content and Figure 1A to Fig. 6.
Too drastic driving adjustment System 300 comprises setup unit 320, measuring unit 340 and adjustment unit 360.Setup unit 320 is in order to the color temperature value of setting at least one pixel (can with reference to the step S100 of previous embodiment), setup unit 320 is set in this example is the color temperature value of each pixel in the display frame of display unit 390, has a plurality of sub-pixels of different colours in pixel.Measuring unit 340 is in order to the too drastic index of measuring these sub-pixels (can with reference to the step S120 of previous embodiment).Adjustment unit all is adjusted to same target bit accurate (can with reference to the step S140 of previous embodiment) in order to the too drastic index with these sub-pixels.
Too drastic driving adjustment System 300 more comprises map unit 370 and storage element 380.Map unit 370 in order to the too drastic index of these sub-pixels after adjusting based on color temperature value remap (re-mapping) become to remap too drastic look-up table (re-mapped OD table).Storage element 380 remaps too drastic look-up table in order to storage, can be with reference to the step S160 of previous embodiment.Principle of operation about too drastic driving adjustment System 300 inner members formerly illustrates in embodiment, does not separately give unnecessary details at this.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. a too drastic driving method of adjustment, is characterized in that, comprises the following step:
Set the color temperature value of at least one pixel, have a plurality of sub-pixels of different colours in this pixel;
Measure the too drastic index of these sub-pixels; And
The too drastic index of these sub-pixels all is adjusted to same target bit standard.
2. too drastic driving method of adjustment according to claim 1, is characterized in that, the step of wherein measuring the too drastic index of these sub-pixels comprises:
With an OPTICAL SENSORS these sub-pixels of sensing brightness separately respectively;
These sub-pixels are respectively by initial gray scale variation to a target gray scale, produce the brightness separately of these sub-pixels according to this brightness of constant interval institute sensing and change waveform, and corresponding brightness changes waveform and has a transition curve; And
According to the variation of this transition curve, calculate this too drastic index.
3. too drastic driving method of adjustment according to claim 1, is characterized in that, the step that wherein the too drastic index of these sub-pixels all is adjusted to same target bit standard comprises:
In a preset range, set this target bit accurate, wherein the too drastic index of these sub-pixels all falls among this preset range; And
It is accurate to this target bit that step is adjusted the too drastic index of these sub-pixels.
4. too drastic driving method of adjustment according to claim 3, is characterized in that, the step of wherein setting this target bit standard comprises:
Select a minimum too drastic index to be used as this target bit standard from the too drastic index of these sub-pixels.
5. too drastic driving method of adjustment according to claim 1, is characterized in that, also comprises:
Based on color temperature value, the too drastic index of these sub-pixels after adjusting is remapped to one remaps too drastic look-up table.
6. a too drastic driving adjustment System, is characterized in that, comprises:
One setup unit in order to set the color temperature value of at least one pixel, has a plurality of sub-pixels of different colours in this pixel;
One measuring unit is in order to measure the too drastic index of these sub-pixels; And
One adjustment unit all is adjusted to same target bit in order to the too drastic index with these sub-pixels accurate.
7. too drastic driving adjustment System according to claim 6, is characterized in that, wherein this measuring unit comprises:
One OPTICAL SENSORS, in order to these sub-pixels of sensing brightness separately respectively, when these sub-pixels during respectively by initial gray scale variation to a target gray scale, this OPTICAL SENSORS produces the brightness separately of these sub-pixels according to this brightness of During institute sensing and changes waveform, and the brightness that sub-pixel is corresponding separately changes waveform and has a transition curve; And
One computing module in order to the variation according to this transition curve, calculates this too drastic index of sub-pixel separately.
8. too drastic driving adjustment System according to claim 6, is characterized in that, wherein this adjustment unit comprises:
One setting value module, accurate in order to set this target bit in a preset range, wherein the too drastic index of these sub-pixels all falls among this preset range; And
One step adjusting module, the too drastic index of adjusting these sub-pixels in order to step is accurate to this target bit.
9. too drastic driving adjustment System according to claim 8, is characterized in that, wherein this setting value module selects a minimum too drastic index to be used as this target bit standard from the too drastic index of these sub-pixels.
10. too drastic driving adjustment System according to claim 6, is characterized in that, also comprises:
One map unit is remapped to one in order to the too drastic index of these sub-pixels after adjusting based on color temperature value and remaps too drastic look-up table; And
One storage element remaps too drastic look-up table in order to store this.
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| TW101126975A TWI485688B (en) | 2012-07-26 | 2012-07-26 | Over-driving adjustment method and system thereof |
| TW101126975 | 2012-07-26 |
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| CN105023545A (en) * | 2014-04-18 | 2015-11-04 | 全方位数位影像开发股份有限公司 | Self-image correction device and method for liquid crystal display |
| CN114360463A (en) * | 2021-11-30 | 2022-04-15 | 重庆惠科金渝光电科技有限公司 | Driving and controlling assembly of display panel, display device, driving method and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201405529A (en) | 2014-02-01 |
| CN103151004B (en) | 2015-01-28 |
| TWI485688B (en) | 2015-05-21 |
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