CN103578391B - Display device and image control method thereof - Google Patents
Display device and image control method thereof Download PDFInfo
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- CN103578391B CN103578391B CN201210275182.4A CN201210275182A CN103578391B CN 103578391 B CN103578391 B CN 103578391B CN 201210275182 A CN201210275182 A CN 201210275182A CN 103578391 B CN103578391 B CN 103578391B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a kind of display device and image control method thereof, described display device comprises a display panel and a driver module.Driver module is electrically connected with display panel, and has an image-processing circuit and a data drive circuit.Image-processing circuit receives one first signal of video signal of a picture frame time, when an average gray-scale value of the first signal of video signal is more than or equal to one first setting grey decision-making, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one first ratio and becomes one second signal of video signal.Data drive circuit receives the second signal of video signal, and drives display panel to show an image according to the second signal of video signal.The present invention also discloses a kind of image control method of above-mentioned display device.
Description
Technical field
The present invention about a kind of display device and image control method thereof, especially in regard to a kind of self-emission display apparatus and image control method thereof.
Background technology
Organic Light Emitting Diode (OrganicLight-EmittingDiode, OLED) have that autoluminescence, high brightness, high contrast, volume are frivolous, low power consumption and the advantage such as reaction velocity is fast, therefore, all kinds of display image system is applied to gradually, such as organic light-emitting display device.Organic light-emitting display device can divide into passive matrix type (Passive-Matrix) and active matrix (Active-Matrix) etc. two kinds according to its type of drive.Passive matrix type organic light-emitting display device is limited to drive pattern, therefore have the life-span shorter with cannot the shortcoming such as large area.Although active matrix organic light-emitting display device cost costly, technique is more complicated, be applicable to the true color display of high information capacity of large scale, high-res, therefore, become the main flow of organic light-emitting display device.
The equivalent electrical circuit of the pixel of known a kind of active matrix organic light-emitting display device has two thin film transistor (TFT)s, an electric capacity (2T1C) and an organic illuminating element.In two transistors, the transistor of one of them is as selector switch, and its grid can receive one scan signal, and its drain electrode can receive a data-signal.Another transistor can be used as a driving element, and this element can control an electric current and drive organic illuminating element luminous.Wherein, data-signal inputs the grid of this driving element, and organic light-emitting display device is by controlling the voltage of this data-signal, to control the luminosity of the organic illuminating element of this pixel.By this, capable of displaying image.
Please respectively with reference to shown in Figure 1A and Figure 1B, wherein, Figure 1A be known a kind of organic light-emitting display device be lit the schematic diagram that pixel intensity accounts for whole elemental area number percent, and the power consumption being lit pixel that Figure 1B is known a kind of organic light-emitting display device accounts for the schematic diagram of whole elemental area number percent.Wherein, the transverse axis of Figure 1A and Figure 1B represents in the show image of organic light-emitting display device respectively, be lit the number percent that pixel accounts for whole elemental area, the longitudinal axis representative of Figure 1A is lit the brightness ratio that the brightness of pixel and whole pixel are lit, and the longitudinal axis of Figure 1B represents the consumed power of display device.In this, as shown in Figure 1A, be that when supposing that pixel is lit, this pixel is shown as white, and when pixel is not lit, this pixel is shown as black.
For the some L of Figure 1A curve, its representative is in the display frame of organic light-emitting display device, and when to be lit number percent that pixel accounts for whole elemental area be 20%, the brightness being lit pixel in this show image is about about 136% when whole pixel is lit.Wherein, when show image be lit pixel account for the ratio of whole elemental area less time, then the brightness being lit pixel is higher, and higher brightness contributes to beholder and more easily sees show image clearly.But, when be lit pixel account for the ratio of whole elemental area higher time, can emit beam owing to there being more pixel in show image, therefore the brightness being lit pixel can not equal proportion raise, therefore, the brightness being lit pixel of Figure 1A reduces with lighting area increase, but beholder also easily can see show image clearly.
In addition, as shown in Figure 1B, when in a display frame, be lit pixel account for the number percent of whole elemental area higher time, the power consumption of organic light-emitting display device almost rises in a linear fashion.
Therefore, how to provide a kind of display device and image control method thereof, display device can be made to have lower power consumption in response to different show image, become one of important topic.
Summary of the invention
Because above-mentioned problem, object of the present invention can make display device have display device and the image control method thereof of lower power consumption in response to different show image for providing a kind of.
For reaching above-mentioned purpose, comprise a display panel and a driver module according to a kind of display device of the present invention.Driver module is electrically connected with display panel, and has an image-processing circuit and a data drive circuit.Image-processing circuit receives one first signal of video signal of a picture frame time, when an average gray-scale value of the first signal of video signal is more than or equal to one first setting grey decision-making, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one first ratio and becomes one second signal of video signal.Data drive circuit receives the second signal of video signal, and drives display panel to show an image according to the second signal of video signal.
In one embodiment, display device is an organic LED display device.
In one embodiment, display panel according to first setting grey decision-making drive current, be between display panel drive whole pixel light current 10% to 30% between.
In one embodiment, when average gray-scale value is more than or equal to the first setting grey decision-making, and when being less than one second setting grey decision-making, image-processing circuit reduces the grey decision-making of the first signal of video signal according to the first ratio and becomes the second signal of video signal.
In one embodiment, when average gray-scale value is more than or equal to the second setting grey decision-making, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one second ratio and becomes one the 3rd signal of video signal.
In one embodiment, display panel according to second setting grey decision-making drive current, be between display panel drive whole pixel light current 65% to 75% between.
In one embodiment, the second setting grey decision-making is greater than the first setting grey decision-making.
In one embodiment, the first ratio is between 0.9 ~ 0.75, and the second ratio is between 0.74 ~ 0.55.
In one embodiment, when average gray-scale value is more than or equal to the first setting grey decision-making, and when being less than one the 3rd setting grey decision-making, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one the 3rd ratio and becomes one the 4th signal of video signal, and the 3rd setting grey decision-making is less than the second setting grey decision-making.
In one embodiment, data drive circuit exports according to the second signal of video signal or the 3rd signal of video signal or the 4th signal of video signal multiple pixel show images that a data drive signal drives display panel.
In one embodiment, each pixel has a driving transistors and a light-emitting component, and the grid of data drive signal difference input queued switches transistor, to control the luminosity of light-emitting component.
For reaching above-mentioned purpose, according to the image control method of a kind of display device of the present invention, display device has a display panel and a driver module, driver module is electrically connected with display panel, and there is an image-processing circuit and a data drive circuit, image control method comprises one first signal of video signal being received a picture frame time by image-processing circuit, when an average gray-scale value of the first signal of video signal is more than or equal to one first setting grey decision-making, and when being less than one second setting grey decision-making, reduce the grey decision-making of the first signal of video signal by image-processing circuit according to one first ratio and become one second signal of video signal.
In one embodiment, display panel, according to the drive current of the first setting grey decision-making, is drive 10% to 30% of whole pixel light current between display panel.
In one embodiment, image control method more comprises when average gray-scale value is more than or equal to one second setting grey decision-making, and when being less than most high gray value, image-processing circuit reduces the grey decision-making of the first signal of video signal according to one second ratio and becomes one the 3rd signal of video signal.
In one embodiment, display panel according to second setting grey decision-making drive current, be between display panel drive whole pixel light current 65% to 75% between.
In one embodiment, the first ratio is between 0.9 ~ 0.75, and the second ratio is between 0.74 ~ 0.55.
In one embodiment, when average gray-scale value is more than or equal to the first setting grey decision-making, and when being less than one the 3rd setting grey decision-making, reduce the grey decision-making of the first signal of video signal by image-processing circuit according to one the 3rd ratio and become one the 4th signal of video signal, and the 3rd setting grey decision-making is less than the second setting grey decision-making.
In one embodiment, image control method more comprises and exports a data drive signal by data drive circuit according to the second signal of video signal or the 3rd signal of video signal or the 4th signal of video signal and drive display panel show image.
In one embodiment, image control method more comprises the multiple pixels controlling display panel respectively by data drive signal and emits beam.
In one embodiment, image control method more comprises the grid of the driving transistors being inputted each pixel by data drive signal respectively, to control the luminosity of a light-emitting component of each pixel.
For reaching above-mentioned purpose, a display panel and a driver module is comprised according to a kind of display device of the present invention, driver module is electrically connected with display panel, and drive display panel show image, wherein, the brightness of display panel point bright pixel with light area percentage there is a curve, curve had one first slope before one first lights area percentage, curve has one second slope after first lights area percentage, and the absolute value of the second slope is greater than the absolute value of the first slope.
In one embodiment, first to light area percentage be between 10% to 30%.
In one embodiment, curve has one the 3rd slope after one second lights area percentage, and the 3rd slope and the second slope are not identical, and second lights area percentage and be greater than first and light area percentage.
In one embodiment, second to light area percentage be between 65% to 75%.
In one embodiment, the absolute value of the second slope is greater than the absolute value of the 3rd slope.
In one embodiment, the brightness of display panel point bright pixel is the brightness of most high gray value.
From the above, the driver module of display device of the present invention has one first signal of video signal that an image-processing circuit can receive a picture frame time, and when an average gray-scale value of the first signal of video signal is more than or equal to one first setting grey decision-making, image-processing circuit can reduce the grey decision-making of the first signal of video signal according to one first ratio and become one second signal of video signal.In addition, data drive circuit can receive the second signal of video signal, and drives display panel show image according to the second signal of video signal.Compare with known, the present invention can in response to the grey decision-making of different show image control data driving circuit export gray scale voltage, make display panel have lower drive current, and then make display device have lower power consumption.
Accompanying drawing explanation
Figure 1A be known a kind of organic light-emitting display device be lit the schematic diagram that pixel intensity accounts for whole elemental area number percent;
Figure 1B is the schematic diagram that the power consumption being lit pixel of known a kind of organic light-emitting display device accounts for whole elemental area number percent;
Fig. 2 is the function block schematic diagram of a kind of display device of present pre-ferred embodiments;
Fig. 3 is the schematic flow sheet of the image control method of a kind of display device of present pre-ferred embodiments;
Fig. 4 A is in application image control method of the present invention, brightness and the schematic diagram lighting area percentage of the some bright pixel of two kinds of different display device; And
Fig. 4 B is in application image control method of the present invention, and the power consumption of the some bright pixel of two kinds of different display device accounts for the schematic diagram of whole elemental area number percent.
Drawing reference numeral:
1: display device
11: display panel
12: driver module
121: image-processing circuit
122: data drive circuit
123: scan drive circuit
A, B: dotted line
A ', B ': solid line
D
n: data line
L: point
S01 ~ S04: step
S1: the first signal of video signal
S2: the second signal of video signal
S
m: sweep trace
Embodiment
Hereinafter with reference to relevant drawings, a kind of display device according to present pre-ferred embodiments and image control method thereof are described, wherein identical element is illustrated with identical reference marks.
Please refer to shown in Fig. 2, it is the function block schematic diagram of a kind of display device 1 of present pre-ferred embodiments.
Display device 1 of the present invention is an autoluminescence (self-luminous) display device.In this, be for active matrix organic light-emitting display device (AM-OLED).Certainly, display device 1 also can be other self-emission display apparatus.Wherein, display device 1 comprises display panel 11 and a driver module 12.
Display panel 11 has at least one pixel, and driver module 12 drives display panel 11 by least one sweep trace and at least one data line.In the present embodiment, display device 1 has multiple pixel (Fig. 2 does not show), multi-strip scanning line S
mand a plurality of data lines D
nfor example.Wherein, described these sweep traces S
mand described these data lines D
nform these pel arrays described in being crisscross arranged.And display panel 11 is by described these sweep traces S
mand described these data lines D
nbe electrically connected with driver module 12.
Driver module 12 comprises an image-processing circuit 121, data drive circuit 122 and scan driving circuit 123.Wherein, scan drive circuit 123 is by described these sweep traces S
mbe electrically connected with display panel 11, and data drive circuit 121 is by described these data lines D
nbe electrically connected with display panel 11.Sweep trace S can be made respectively when scan drive circuit 123 exports one scan drive singal
mconducting, and data drive circuit 121 can by a data drive signal of every for correspondence one-row pixels by described these data lines D
nbe sent to these pixels described, to make display panel 11 show image.In addition, driver module 12 more can comprise a sequential control (T-con) circuit (Fig. 2 does not show) respectively with data drive circuit 121 and scan drive circuit 123.Wherein, image-processing circuit 121 can be included in sequential control circuit, to save circuit cost.Certainly, image-processing circuit 121 also can be an independently integrated circuit, in this, is not limited.
Image-processing circuit 121 can receive one first signal of video signal S1 of a picture frame time (frametime), and calculates an average gray-scale value of the first signal of video signal S1.Wherein, a picture frame time is exactly the time that display device 1 shows needed for a picture, therefore the first signal of video signal S1 has in a display frame, drives whole grey decision-making of all pixels of display panel 11.In other words, image-processing circuit 121 first calculates the average gray-scale value of all pixels of a display frame, and when this average gray-scale value is more than or equal to one first setting grey decision-making (first setting GTG value≤average gray-scale value), image-processing circuit 121 can reduce the grey decision-making of the first signal of video signal S1 according to one first ratio and become one second signal of video signal S2.In this, display panel 11 can according to the first setting grey decision-making and luminous, and display panel 11 sets the drive current of grey decision-making according to first, be can between display panel drive whole pixel light current 10% to 30% between.
In the present embodiment, for the grey decision-making of 8 bits, the scope of the grey decision-making of display panel 11 is between 0 ~ 255, therefore, for the first setting grey decision-making for 145, grey decision-making 145 drives the electric current of display panel 11, approximates 30% of the drive current all pixels of display panel 11 lighted with most high gray value (255).In addition, the value of the first ratio can between 0.9 ~ 0.75, and first ratio of the present embodiment is for 0.8.Therefore, when the average gray-scale value of all pixels of display frame is more than or equal to 145, image-processing circuit 121 can obtain the second signal of video signal S2 after each grey decision-making of first signal of video signal S1 can being multiplied by 0.8 respectively.Such as the grey decision-making of a certain pixel of the first signal of video signal S1 is 200, and supposes that the mean value of all grey decision-making in picture is higher than 145, so the grey decision-making of pixel will reduce to 200 × 0.8=160, this will be the new grey decision-making of this pixel of the second signal of video signal S2.Other pixel by that analogy.
In addition, in the present embodiment, when the average gray-scale value calculated is more than or equal to the first setting grey decision-making, and when being less than one second setting grey decision-making, that is during first setting GTG value≤flat equal GTG value≤the second setting grey decision-making, then image-processing circuit 121 still reduces the grey decision-making of the first signal of video signal S1 according to the first ratio and becomes the second signal of video signal S2.In addition, when the average gray-scale value calculated is more than or equal to the second setting grey decision-making, that is second sets GTG value≤average gray-scale value, then image-processing circuit 121 can reduce the grey decision-making of the first signal of video signal S1 according to one second ratio and become one the 3rd signal of video signal (Fig. 2 does not show).Wherein, the first ratio can be identical or not identical with the numerical value of the second ratio, and the second setting grey decision-making can be greater than the first setting grey decision-making.Wherein, display panel 11 according to second setting grey decision-making drive current, be can between display panel 11 drive whole pixel light current 65% to 75% between.The value of the second ratio can between 0.74 ~ 0.55, and in the present embodiment, the second ratio is 0.72, and the second setting grey decision-making is such as 215.Grey decision-making 215 drives the electric current of display panel 11, and be equal to that display panel 11 drives whole pixel light current 70%.
Hold, image-processing circuit 121 of the present invention first calculates the average gray-scale value of all pixels in a display frame, and when 0≤average gray-scale value < first sets grey decision-making (such as 145), the first signal of video signal S1 does not change; When first setting grey decision-making (such as 145)≤average gray-scale value < second sets grey decision-making (such as 215), each grey decision-making of the first signal of video signal S1 is multiplied by the first ratio (such as 0.8) and becomes the second signal of video signal S2; When the second setting grey decision-making (such as 215)≤flat equal GTG value≤most high gray value (such as 255), then each grey decision-making of the first signal of video signal S1 is multiplied by the second ratio (such as 0.72) and becomes the 3rd signal of video signal.In this, first setting grey decision-making be the 145, second setting grey decision-making to be the 215, first ratio be 0.8 and second ratio be 0.72 just citing, user can use the first different setting grey decision-making, the second setting grey decision-making, the first ratio and the second ratio according to its demand certainly.
In addition, have the existence of the second setting grey decision-making and the second ratio in the present embodiment, but, in other embodiments, user also can not use the second setting grey decision-making and the second ratio, and only uses the first setting grey decision-making and the first ratio.In other words, in other embodiment, when the first setting GTG Zhi≤Ping equal GTG Zhi≤most high gray value (such as 255), each grey decision-making of the first signal of video signal S1 can be multiplied by a ratio by image-processing circuit 121 respectively, to obtain the second signal of video signal S2.In addition, user also according to different display device setting more setting grey decision-making and ratio thereof, such as, can set the 3rd setting grey decision-making, the 4th setting grey decision-making, the 3rd ratio and the 4th ratio etc. certainly.Such as can set one the 3rd setting grey decision-making between the first setting grey decision-making and the second setting grey decision-making, and when average gray-scale value is more than or equal to the first setting grey decision-making, and when being less than one the 3rd setting grey decision-making, image-processing circuit 121 can reduce the grey decision-making of the first signal of video signal according to one the 3rd ratio and become one the 4th signal of video signal, or be other setting means, in this, do not limited.
When image-processing circuit 121 produces the second signal of video signal S2 or the 3rd signal of video signal or the 4th signal of video signal, data drive circuit 122 can receive, and drives display panel 11 show image according to the second signal of video signal S2 or the 3rd signal of video signal or the 4th signal of video signal.In this, data drive circuit 122 can export a data drive signal according to the signal of video signal correspondence received and drive display panel 11 show image.In other words, when data drive circuit 122 receives the signal of video signal of image-processing circuit 121 output, data drive circuit 122 can export data drive signal according to this signal of video signal correspondence, and these pixels described that data drive signal can control display panel 11 respectively send corresponding light, with show image picture.
In the present embodiment, each pixel of display panel 11 can have a driving transistors and a light-emitting component (Organic Light Emitting Diode) respectively, and wherein, driving transistors can control light-emitting component luminescence.And the data drive signal that data drive circuit 122 exports is by data line D
ninput the grid of the driving transistors of each pixel, the luminosity of the light-emitting component of each pixel can be controlled by this.Due to when the average gray-scale value of display frame is more than or equal to the first setting grey decision-making, image-processing circuit 121 has reduced the grey decision-making that signal of video signal exports, therefore all gray scale voltages of the data drive signal of data drive circuit 122 output also reduce, therefore the luminosity of the light-emitting component of all pixels also reduces, make to drive the electric current of display panel 11 also to reduce, therefore the power consumption of display device 1 also can reduce.
It should be noted that when the average gray-scale value of display frame is lower, the ratio being lit pixel representing display device 1 display frame is less, therefore the present invention does not turn down the grey decision-making of the first signal of video signal S1, so contributes to beholder and sees show image clearly.But, when the average gray-scale value of display frame is higher, the ratio being lit pixel represented in the display frame of display device 1 is higher, can emit beam owing to there being more pixel in show image, therefore the present invention turns down the grey decision-making of the first signal of video signal S1, and then the overall brightness of display device 1 display frame is reduced, but for beholder, although the overall brightness of display frame reduces, but can emit beam owing to there being more pixel in picture, therefore beholder be not easy to find, do not affect its rating quality yet.
In addition, shown in Fig. 2 and Fig. 3, wherein, Fig. 3 is the schematic flow sheet of the image control method of a kind of display device of present pre-ferred embodiments.
As shown in Figure 2, display device 1 comprises display panel 11 and a driver module 12.Driver module 12 comprises an image-processing circuit 121, data drive circuit 122 and scan driving circuit 123.Wherein, the technical characteristic of display device 1 can refer to above-mentioned, repeats no more in this.
In addition, as shown in Figure 3, the image control method of display device of the present invention can comprise step S01 to step S04.
In step S01, as shown in Figure 2, be the one first signal of video signal S1 being received a picture frame time by image-processing circuit 121.In this, a picture frame time is exactly the time that display device 1 shows needed for a picture, therefore the first signal of video signal S1 has in a display frame, drives whole grey decision-making of all pixels of display panel 11.
Then, in step S02, when an average gray-scale value of the first signal of video signal S1 is more than or equal to one first setting grey decision-making, and when being less than one second setting grey decision-making, reducing the grey decision-making of the first signal of video signal S1 by image-processing circuit 121 according to one first ratio and become one second signal of video signal S2.Wherein, display panel 11, according to the drive current of the first setting grey decision-making, is drive 10% to 30% of whole pixel light current between display panel 11.In this, the first ratio is 0.8, and the first setting grey decision-making is for 145, and grey decision-making 145 drives the electric current of display panel 11, approximates 30% of the drive current all pixels of display panel 11 lighted with most high gray value (255).
In addition, in step S03, when average gray-scale value is more than or equal to the second setting grey decision-making, and when being less than most high gray value, reducing the grey decision-making of the first signal of video signal S1 by image-processing circuit 121 according to one second ratio and become one the 3rd signal of video signal.In this, display panel 11 according to second setting grey decision-making drive current, be can between display panel 11 drive whole pixel light current 65% to 75% between.In the present embodiment, the second ratio is 0.72, and the second setting grey decision-making is such as 215.Grey decision-making 215 drives the electric current of display panel 11, and be equal to that display panel 11 drives whole pixel light current 70%.
Finally, after the judgement performing average gray-scale value and process, can perform step S04, be export a data drive signal by data drive circuit 122 according to the second signal of video signal S2 or the 3rd signal of video signal to drive display panel 11 show image.In this, be that the multiple pixels controlling display panel 11 respectively by data drive signal emit beam, with show image.In addition, be the grid of a driving transistors of each pixel by data drive signal difference input display panel 11, to control the luminosity of a light-emitting component of each pixel.
In addition, the further feature of the image control method of display device of the present invention, in above-mentioned middle detailed description, repeats no more in this.
In addition, please respectively with reference to shown in Fig. 4 A and Fig. 4 B, wherein, Fig. 4 A is in application image control method of the present invention, brightness and the schematic diagram lighting area (onarea) number percent of the some bright pixel of two kinds of different display device, and Fig. 4 B is in application image control method of the present invention, the power consumption of the some bright pixel of two kinds of different display device accounts for the schematic diagram of whole elemental area number percent.In this, be the ratio (such as 30:100) of the drive current of a measurement display frame and the drive current of complete bright picture, just can correspond to the number percent how much lighting area.In addition, the present invention after measurement drives the electric current ratio of display panel with average gray-scale value and complete bright grey decision-making, such as, obtains the number percent lighting area of pixel in the mode of look-up table (look-uptable).In addition, the brightness of display panel point bright pixel is the brightness of most high gray value.
Wherein, the transverse axis of Fig. 4 A and Fig. 4 B represents in the show image of display device respectively, and pixel lights the number percent of area, and the longitudinal axis representative of Fig. 4 A is lit the brightness of pixel, and the longitudinal axis of Fig. 4 B represents the consumed power of two kinds of display device.In addition, the solid line A ' of Fig. 4 A and Fig. 4 B, B ' represent that two kinds of different display device do not use the curve of image control method of the present invention, and dotted line A, B represent that two kinds of different display device use the curve of image control method of the present invention.
In the present embodiment, with the first setting grey decision-making for 145, grey decision-making 145 drives the electric current of display panel 11, equal 30% of the drive current all pixels of display panel 11 lighted with most high gray value (255), the 30%(the present invention namely lighting area can be light area 10% ~ 30% between).Therefore, as shown in Figure 4 A, after being lit elemental area ratio 30%, the brightness of dotted line A and B reduces because of the first ratio (0.8), therefore dotted line A, B are in time being greater than 30%, brightness curve is turned right soon and is had a down dip, in other words, dotted line A, B had one first slope before light area 30%, dotted line A, B have one second slope after light area 30%, and the first slope and the second slope are not identical, and the absolute value of the second slope be greater than the first slope absolute value (the present invention can be light area 10% ~ 30% between).
In addition, the second setting grey decision-making of the present embodiment is for 215, and grey decision-making 215 drives the electric current of display panel 11, be equal to that display panel 11 drives whole pixel light current 70%, the 70%(the present invention namely lighting area can be light area 65% ~ 75% between).Therefore, when display panel be lit elemental area more than 70% after (the second ratio is 0.72), dotted line A, B turn right with another slope again and have a down dip, in other words, dotted line A, B have one the 3rd slope after light area 70%, and the 3rd slope and the second slope are not identical, and the absolute value of the second slope be greater than the 3rd slope absolute value (the present invention can be light area 65% ~ 75% between).
In addition, as shown in Figure 4 B, when the number percent lighting area is more and more high, the power consumption of display device is also more and more high.But, can obviously be found out by Fig. 4 B, in time lighting area more than 30%, curve A, the B of the power consumption of image control method of the present invention are higher along with lighting area, more a lot of than not using the power consumption profile A ' of image control method of the present invention, B ' reduction significantly.
What last was carried is, for organic LED display device, when display one webpage, due in the display frame on webpage, the ratio usually shared by white portion is higher, show according to statistical figure, the average power consumption of the display frame of webpage is about 75% of the power consumption of the whole display white of picture, be also approximately equal to that a bright pixel accounts for whole elemental area about 75%, therefore, image control method of the present invention can be applied as mentioned above to reduce its power consumption.
In addition, according to statistics, if during organic LED display device display movie or television picture, the average power consumption of its display frame is about 20% (is approximately equal to light elemental area account for whole elemental area about 20%) of the power consumption of the whole display white of picture.In addition, if during the static images such as display photo, the average power consumption of its display frame is about 23% (is approximately equal to a bright pixel and accounts for whole elemental area about 23%) of the power consumption of the whole display white of picture.Two kinds of above-mentioned display frames, although its power consumption is relatively low, but, still moderately can apply image control method of the present invention and more reduce its power consumption.
In sum, the driver module of display device of the present invention has one first signal of video signal that an image-processing circuit can receive a picture frame time, and when an average gray-scale value of the first signal of video signal is more than or equal to one first setting grey decision-making, image-processing circuit can reduce the grey decision-making of the first signal of video signal according to one first ratio and become one second signal of video signal.In addition, data drive circuit can receive the second signal of video signal, and drives display panel show image according to the second signal of video signal.Compare with known, the present invention can in response to the grey decision-making of different show image control data driving circuit export gray scale voltage, make display panel have lower drive current, and then make display device have lower power consumption.
The foregoing is only illustrative, but not be restricted person.Anyly do not depart from spirit of the present invention and category, and to its equivalent modifications of carrying out or change, all should be included in claim.
Claims (25)
1. a display device, is characterized in that, described display device comprises:
One display panel; And
One driver module, is electrically connected with described display panel, and has:
One image-processing circuit, receive one first signal of video signal of a picture frame time, when an average gray-scale value of described first signal of video signal is more than or equal to one first setting grey decision-making, described image-processing circuit reduces the grey decision-making of described first signal of video signal according to one first ratio and becomes one second signal of video signal; And
One data drive circuit, receives described second signal of video signal, and drives described display panel show image according to described second signal of video signal.
2. display device as claimed in claim 1, it is characterized in that, it is an organic LED display device.
3. display device as claimed in claim 1, is characterized in that, described display panel according to the drive current of described first setting grey decision-making, be between described display panel drive whole pixel light current 10% to 30% between.
4. display device as claimed in claim 1, it is characterized in that, when described average gray-scale value is more than or equal to described first setting grey decision-making, and when being less than one second setting grey decision-making, described image-processing circuit reduces the grey decision-making of described first signal of video signal according to described first ratio and becomes described second signal of video signal.
5. display device as claimed in claim 4, it is characterized in that, when described average gray-scale value is more than or equal to described second setting grey decision-making, described image-processing circuit reduces the grey decision-making of described first signal of video signal according to one second ratio and becomes one the 3rd signal of video signal.
6. display device as claimed in claim 5, is characterized in that, described display panel according to the drive current of described second setting grey decision-making, be between described display panel drive whole pixel light current 65% to 75% between.
7. display device as claimed in claim 4, is characterized in that, described second setting grey decision-making is greater than described first setting grey decision-making.
8. display device as claimed in claim 5, it is characterized in that, described first ratio is between 0.75 ~ 0.9, and described second ratio is between 0.55 ~ 0.74.
9. display device as claimed in claim 5, it is characterized in that, when described average gray-scale value is more than or equal to described first setting grey decision-making, and when being less than one the 3rd setting grey decision-making, described image-processing circuit reduces the grey decision-making of described first signal of video signal according to one the 3rd ratio and becomes one the 4th signal of video signal, and described 3rd setting grey decision-making is less than described second setting grey decision-making.
10. display device as claimed in claim 9, it is characterized in that, described data drive circuit exports according to described second signal of video signal or described 3rd signal of video signal or described 4th signal of video signal multiple pixel show images that a data drive signal drives described display panel.
11. display device as claimed in claim 10, it is characterized in that, each described pixel has a driving transistors and a light-emitting component respectively, and described data drive signal inputs the grid of described driving transistors, to control the luminosity of described light-emitting component.
The image control method of 12. 1 kinds of display device, it is characterized in that, described display device has a display panel and a driver module, and described driver module is electrically connected with described display panel, and there is an image-processing circuit and a data drive circuit, described image control method comprises:
One first signal of video signal of a picture frame time is received by described image-processing circuit;
When an average gray-scale value of described first signal of video signal is more than or equal to one first setting grey decision-making, and when being less than one second setting grey decision-making, reducing the grey decision-making of described first signal of video signal by described image-processing circuit according to one first ratio and become one second signal of video signal.
13. image control methods as claimed in claim 12, is characterized in that, described display panel, according to the drive current of described first setting grey decision-making, is drive 10% to 30% of whole pixel light current between described display panel.
14. image control methods as claimed in claim 12, it is characterized in that, described image control method more comprises:
When described average gray-scale value is more than or equal to described second setting grey decision-making, and when being less than most high gray value, reducing the grey decision-making of described first signal of video signal by described image-processing circuit according to one second ratio and become one the 3rd signal of video signal.
15. image control methods as claimed in claim 14, is characterized in that, described display panel according to described second setting grey decision-making drive current, be between described display panel drive whole pixel light current 65% to 75% between.
16. image control methods as claimed in claim 14, it is characterized in that, described first ratio is between 0.75 ~ 0.9, and described second ratio is between 0.55 ~ 0.74.
17. image control methods as claimed in claim 14, it is characterized in that, described image control method more comprises:
When described average gray-scale value is more than or equal to described first setting grey decision-making, and when being less than one the 3rd setting grey decision-making, reduce the grey decision-making of described first signal of video signal by described image-processing circuit according to one the 3rd ratio and become one the 4th signal of video signal, and described 3rd setting grey decision-making is less than described second setting grey decision-making.
18. image control methods as claimed in claim 17, it is characterized in that, described image control method more comprises:
Export a data drive signal by described data drive circuit according to described second signal of video signal or described 3rd signal of video signal or described 4th signal of video signal and drive described display panel show image.
19. image control methods as claimed in claim 18, it is characterized in that, described image control method more comprises:
The multiple pixels being controlled described display panel by described data drive signal are respectively emitted beam.
20. image control methods as claimed in claim 19, it is characterized in that, described image control method more comprises:
The grid of a driving transistors of each described pixel is inputted respectively, to control the luminosity of a light-emitting component of each described pixel by described data drive signal.
21. 1 kinds of display device, is characterized in that, described display device comprises:
One display panel; And
One driver module, is electrically connected with described display panel, and drives described display panel show image,
Wherein, the brightness of described display panel point bright pixel with light area percentage there is a curve, described curve had one first slope before one first lights area percentage, described curve has one second slope after described first lights area percentage, and the absolute value of described second slope is greater than the absolute value of described first slope.
22. display device as claimed in claim 21, is characterized in that, described first to light area percentage be between 10% to 30%.
23. display device as claimed in claim 21, it is characterized in that, described curve has one the 3rd slope after one second lights area percentage, the absolute value of described second slope is greater than the absolute value of described 3rd slope, and described second lights area percentage is greater than described first and lights area percentage.
24. display device as claimed in claim 23, is characterized in that, described second to light area percentage be between 65% to 75%.
25. display device as claimed in claim 21, is characterized in that, the described brightness of described display panel point bright pixel is the brightness of most high gray value.
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| TWI560647B (en) * | 2015-09-16 | 2016-12-01 | Au Optronics Corp | Displaying method and display panel utilizing the same |
| CN109377941B (en) * | 2018-12-21 | 2020-09-01 | 深圳市华星光电半导体显示技术有限公司 | Image display device and image display adjusting method |
| US10714003B1 (en) * | 2019-01-03 | 2020-07-14 | Himax Technologies Limited | Image processing method and image processing system |
| CN111933082B (en) * | 2020-09-03 | 2022-11-29 | 京东方科技集团股份有限公司 | Method for improving low gray scale image quality and display device |
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| KR101286536B1 (en) * | 2008-03-17 | 2013-07-17 | 엘지디스플레이 주식회사 | Digital gamma correction system and correction method |
| TWI427596B (en) * | 2009-08-14 | 2014-02-21 | Innolux Corp | Display apparatus |
| KR20120002069A (en) * | 2010-06-30 | 2012-01-05 | 삼성모바일디스플레이주식회사 | Organic light emitting display device and driving method thereof |
| KR101721889B1 (en) * | 2010-08-06 | 2017-03-31 | 삼성전자주식회사 | Active matrix organic light-emitting diode display device, and display control method thereof |
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| CN1841477A (en) * | 2005-03-31 | 2006-10-04 | 东北先锋电子股份有限公司 | Apparatus and method for driving self-luminescent display panel |
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