CN105632406B - Display device and its image control method - Google Patents
Display device and its image control method Download PDFInfo
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- CN105632406B CN105632406B CN201610005789.9A CN201610005789A CN105632406B CN 105632406 B CN105632406 B CN 105632406B CN 201610005789 A CN201610005789 A CN 201610005789A CN 105632406 B CN105632406 B CN 105632406B
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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
-
- 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
Abstract
A kind of display device of present invention offer and its image control method, the display device include a display panel and a drive module.Drive module is electrically connected with display panel, and display panel is driven to show image, wherein, the brightness of display panel point bright pixel has a curve with area percentage is lighted, curve has a first slope when less than 1 first lights area percentage, there is curve one second slope, the absolute value of the second slope to be more than the absolute value of first slope when lighting area percentage more than first.The present invention also discloses a kind of image control method of above-mentioned display device.
Description
It is on 08 03rd, 2012 that the application, which is the applying date, application No. is 201210275182.4, entitled " display
The divisional application of the patent application of device and its image control method ".
Technical field
The present invention about a kind of display device and its image control method, especially in regard to a kind of self-emission display apparatus and its
Image control method.
Background technology
Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) has self-luminous, high brightness, height
Therefore comparison, the advantages that volume is frivolous, low power consumption and reaction speed are fast, are gradually applied to all kinds of display image systems, such as
Organic light-emitting display device.Organic light-emitting display device can divide into passive matrix type (Passive- according to its type of drive
Matrix) with two kinds of active matrix (Active-Matrix) etc..Passive matrix type organic light-emitting display device is limited to drive
Pattern, thus have the shortcomings that the service life it is shorter with can not be larger in area.Although active matrix organic light-emitting display device cost compared with
Costliness, technique are more complex, but the true color suitable for large scale, the high information capacity of high-res is shown, therefore, it has also become have
The mainstream of machine luminous display unit.
A kind of equivalent circuit of the pixel of known active matrix organic light-emitting display device have two thin film transistor (TFT)s,
One capacitance (2T1C) and an organic illuminating element.In two transistors, the transistor of one of them alternatively switchs,
Its grid can receive scan signal, and its drain electrode can receive a data-signal.Another transistor can be used as a driving element,
This element can control electric current driving organic illuminating element to shine.Wherein, data-signal inputs the grid of the driving element, and has
Machine luminous display unit can be by controlling the voltage of the data-signal, to control the luminance of the organic illuminating element of the pixel
Degree.Thereby, capable of displaying image.
It please respectively refer to shown in Figure 1A and Figure 1B, wherein Figure 1A is a kind of being lit for known organic light-emitting display device
Pixel intensity accounts for the schematic diagram of whole elemental area percentages, and Figure 1B is a kind of being lit for known organic light-emitting display device
The power consumption of pixel accounts for the schematic diagram of whole elemental area percentages.Wherein, the horizontal axis of Figure 1A and Figure 1B respectively represents organic
In the display image of luminous display unit, it is lit the percentage that pixel accounts for whole elemental areas, the longitudinal axis of Figure 1A is represented by point
The brightness ratio that the brightness of bright pixel is lit with whole pixels, and the longitudinal axis of Figure 1B represents the consumption power of display device.In
This, as shown in Figure 1A, when assuming that pixel is lit, which is shown as white, and when pixel is not lit, which shows
For black.
By taking the point L of Figure 1A curves as an example, represents in the display picture of organic light-emitting display device, be lit pixel and account for
When the percentage of whole elemental areas is 20%, when the brightness that pixel is lit in the display image is about that whole pixels are lit
136% or so.Wherein, when show image be lit pixel account for whole elemental areas ratio it is smaller when, then be lit picture
The brightness of element is higher, and higher brightness contributes to viewer to be easier to see display image.But, it accounts for entirely when being lit pixel
When the ratio of portion's elemental area is higher, due to having more pixel that can emit beam in display image, therefore it is lit the bright of pixel
Degree will not equal proportion increase, therefore, the brightness for being lit pixel of Figure 1A is increased and reduces with lighting area, but viewer
It can easily see display image.
In addition, as shown in Figure 1B, when one display picture in, be lit pixel account for whole elemental areas percentage it is higher
When, the power consumption of organic light-emitting display device almost rises in a linear fashion.
Therefore, how a kind of display device and its image control method are provided, display can be made in response to different display images
Device has lower power consumption, it has also become one of important topic.
Invention content
In view of the above subject, the purpose of the present invention can be such that display device has to provide one kind in response to different display images
There are the display device and its image control method of lower power consumption.
In order to achieve the above object, a kind of display device according to the present invention includes a display panel and a drive module.It drives
Dynamic model block is electrically connected with display panel, and has an image-processing circuit and a data drive circuit.Image-processing circuit receives
One first video signal of one picture frame time, when an average gray-scale value of the first video signal is greater than or equal to one first setting ash
When rank is worth, image-processing circuit reduces the grayscale value of the first video signal according to one first ratio and believes as one second image
Number.Data drive circuit receives the second video signal, and shows an image according to the second video signal driving display panel.
In one embodiment, display device is an organic LED display device.
In one embodiment, the driving current that display panel sets grayscale value according to first is driven between display panel
Between the 10% to 30% of whole pixel light currents.
In one embodiment, grayscale value is set when average gray-scale value is greater than or equal to first, and less than one second setting ash
When rank is worth, image-processing circuit reduces the grayscale value of the first video signal according to the first ratio and becomes the second video signal.
In one embodiment, when average gray-scale value is greater than or equal to the second setting grayscale value, image-processing circuit foundation
One second ratio reduces the grayscale value of the first video signal and becomes a third video signal.
In one embodiment, the driving current that display panel sets grayscale value according to second is driven between display panel
Between the 65% to 75% of whole pixel light currents.
In one embodiment, the second setting grayscale value is more than the first setting grayscale value.
In one embodiment, the first ratio be between 0.9~0.75, the second ratio be between 0.74~0.55 it
Between.
In one embodiment, grayscale value is set when average gray-scale value is greater than or equal to first, and less than third setting ash
When rank is worth, image-processing circuit reduces the grayscale value of the first video signal according to a third ratio and believes as one the 4th image
Number, and third setting grayscale value is less than the second setting grayscale value.
In one embodiment, data drive circuit is according to the second video signal or third video signal or the 4th video signal
The multiple pixels for exporting data drive signal driving display panel show image.
In one embodiment, there is each pixel a driving transistor and a light-emitting component, data drive signal to input respectively
The grid of driving transistor, to control the light emission luminance of light-emitting component.
In order to achieve the above object, a kind of image control method of display device according to the present invention, display device has one to show
Show that panel and a drive module, drive module are electrically connected with display panel, and there is an image-processing circuit and a data-driven
Circuit, image control method include receiving one first video signal of a picture frame time, when the first shadow by image-processing circuit
When setting grayscale value as an average gray-scale value of signal is greater than or equal to one first, and being less than one second setting grayscale value, pass through
Image-processing circuit reduces the grayscale value of the first video signal according to one first ratio and becomes one second video signal.
In one embodiment, the driving current that display panel sets grayscale value according to first is driven between display panel
The 10% to 30% of whole pixel light currents.
In one embodiment, image control method is further included when average gray-scale value is greater than or equal to one second setting grayscale
When being worth, and being less than highest grayscale value, the grayscale value that image-processing circuit reduces the first video signal according to one second ratio forms
For a third video signal.
In one embodiment, the driving current that display panel sets grayscale value according to second is driven between display panel
Between the 65% to 75% of whole pixel light currents.
In one embodiment, the first ratio be between 0.9~0.75, the second ratio be between 0.74~0.55 it
Between.
In one embodiment, grayscale value is set when average gray-scale value is greater than or equal to first, and less than third setting ash
When rank is worth, the grayscale value of the first video signal is reduced according to a third ratio by image-processing circuit by becomes one the 4th image
Signal, and third setting grayscale value is less than the second setting grayscale value.
In one embodiment, image control method is further included through data drive circuit according to the second video signal or third
Video signal or the 4th video signal export data drive signal driving display panel and show image.
In one embodiment, image control method further include controlled the display panel respectively by data drive signal it is multiple
Pixel emits beam.
In one embodiment, image control method further includes the driving for inputting each pixel respectively by data drive signal
The grid of transistor, to control the light emission luminance of a light-emitting component of each pixel.
In order to achieve the above object, a kind of display device according to the present invention includes a display panel and a drive module, drive
Dynamic model block is electrically connected with display panel, and display panel is driven to show image, wherein the brightness of display panel point bright pixel and point
Bright area percentage has a curve, and curve is lighted in one first has a first slope before area percentage, and curve is in the
One lights area percentage, and there is one second slope, the absolute value of the second slope to be more than the absolute value of first slope later.
In one embodiment, first to light area percentage be between 10% to 30%.
In one embodiment, curve is lighted in one second has a third slope after area percentage, third slope with
Second slope is to differ, and second lights area percentage and light area percentage more than first.
In one embodiment, second to light area percentage be between 65% to 75%.
In one embodiment, the absolute value of the second slope is more than the absolute value of third slope.
In one embodiment, the brightness of display panel point bright pixel is the brightness of highest grayscale value.
From the above, there is the drive module of display device of the present invention an image-processing circuit can receive a picture frame time
One first video signal, and when an average gray-scale value of the first video signal is greater than or equal to one first setting grayscale value, shadow
Become one second video signal as processing circuit can reduce the grayscale value of the first video signal according to one first ratio.In addition,
Data drive circuit can receive the second video signal, and show image according to the second video signal driving display panel.With it is known
It compares, the present invention can control the gray scale voltage of data drive circuit output in response to the grayscale value of different display images, make display
Panel has lower driving current, and then display device is made to have lower power consumption.
Description of the drawings
Figure 1A is that a kind of known pixel intensity that is lit of organic light-emitting display device accounts for whole elemental area percentages
Schematic diagram；
Figure 1B is that a kind of known power consumption for being lit pixel of organic light-emitting display device accounts for whole elemental areas hundred
Divide the schematic diagram of ratio；
Fig. 2 is a kind of function block schematic diagram of display device of present pre-ferred embodiments；
Fig. 3 is a kind of flow diagram of the image control method of display device of present pre-ferred embodiments；
Fig. 4 A are the brightness of the point bright pixel of two kinds of different display devices and point in the image control method using the present invention
The schematic diagram of bright area percentage；And
Fig. 4 B are the power consumption of the point bright pixel of two kinds of different display devices in the image control method using the present invention
Account for the schematic diagram of whole elemental area percentages.
Drawing reference numeral：
1：Display device
11：Display panel
12：Drive module
121：Image-processing circuit
122：Data drive circuit
123：Scan drive circuit
A、B：Dotted line
A′、B′：Solid line
Dn：Data line
L：Point
S01~S04：Step
S1：First video signal
S2：Second video signal
Sm：Scan line
Specific implementation mode
Hereinafter with reference to relevant drawings, illustrate a kind of display device and its image controlling party according to present pre-ferred embodiments
Method, wherein identical element will be illustrated with identical reference marks.
It please refers to shown in Fig. 2, is a kind of function block schematic diagram of display device 1 of present pre-ferred embodiments.
The display device 1 of the present invention is a self-luminous (self-luminous) display device.It is with active-matrix in this
For formula organic light-emitting display device (AM-OLED).Certainly, display device 1 or other self-emission display apparatus.Its
In, display device 1 includes a display panel 11 and a drive module 12.
Display panel 11 has an at least pixel, and drive module 12 is by least scan line and an at least data line
Drive display panel 11.In this example it is shown that device 1 is with multiple pixels (Fig. 2 is not shown), multi-strip scanning line Sm
And multiple data lines DnFor.Wherein, these scan lines SmAnd these data lines DnIt is in be staggered to be formed to be
State these pel arrays.And display panel 11 can pass through these scan lines SmAnd these data lines DnWith drive module
12 electrical connections.
Drive module 12 includes an image-processing circuit 121, data drive circuit 122 and a scan drive circuit 123.Its
In, scan drive circuit 123 is by these scan lines SmIt is electrically connected with display panel 11, and data drive circuit 121
It is by these data lines DnIt is electrically connected with display panel 11.When scan drive circuit 123 exports a scanning drive signal
When can make scan line S respectivelymConducting, and data drive circuit 121 can lead to a corresponding data drive signal per one-row pixels
Cross these data lines DnThese described pixels are sent to, so that display panel 11 shows image.In addition, drive module 12 is more
May include a timing control (T-con) circuit (Fig. 2 is not shown) respectively with data drive circuit 121 and scan drive circuit 123.
Wherein, image-processing circuit 121 may include in sequential control circuit, to save circuit cost.Certainly, image-processing circuit
121 are alternatively an independent integrated circuit does not limit in this.
Image-processing circuit 121 can receive one first video signal S1 of a picture frame time (frame time), and calculate
An average gray-scale value of first video signal S1.Wherein, a picture frame time is exactly that display device 1 is shown needed for a picture
Time, therefore the first video signal S1 tools drive whole grayscale of all pixels of display panel 11 there are one in display picture
Value.In other words, image-processing circuit 121 first calculates the average gray-scale value of all pixels of a display picture, and when this average ash
When rank value is greater than or equal to one first setting grayscale value (the first setting grayscale Zhi≤average gray-scale value), image-processing circuit 121
The grayscale value of the first video signal S1 can be reduced according to one first ratio and become one second video signal S2.In this, display surface
Plate 11 can shine according to the first setting grayscale value, and driving current of the display panel 11 according to the first setting grayscale value, and being can
Between 10% to 30% that display panel drives whole pixel light currents.
In the present embodiment, by taking the grayscale value of 8 bits as an example, the range of the grayscale value of display panel 11 is between 0~255
Between, therefore, grayscale value is set as 145 by first, grayscale value 145 drives the electric current of display panel 11, is approximately equal to most
The 30% of the driving current that high gray value (255) lights all pixels of display panel 11.In addition, the value of the first ratio can be situated between
Between 0.9~0.75, first ratio of the present embodiment is for 0.8.Therefore, being averaged when all pixels of display picture
When grayscale value is greater than or equal to 145, each grayscale value of the first video signal S1 can be respectively multiplied by by image-processing circuit 121
After 0.8, you can obtain the second video signal S2.Such as first the grayscale value of a certain pixel of video signal S1 be 200, and assume
The average value of all grayscale values is above 145 in picture, so the grayscale value of pixel will be reduced to 200 × 0.8=160, this is
The new grayscale value of the pixel of second video signal S2.Other pixels and so on.
In addition, in the present embodiment, setting grayscale value when the average gray-scale value being calculated is greater than or equal to first, and small
When one second setting grayscale value, that is, when the first equal grayscale Zhi≤second of setting grayscale Zhi≤Ping set grayscale value, then image
Processing circuit 121 reduces the grayscale value of the first video signal S1 also in accordance with the first ratio and becomes the second video signal S2.In addition,
When the average gray-scale value being calculated is greater than or equal to the second setting grayscale value, that is, the second setting grayscale Zhi≤average grayscale
It is worth, then image-processing circuit 121 can reduce the grayscale value of the first video signal S1 according to one second ratio and become a third shadow
As signal (Fig. 2 is not shown).Wherein, the numerical value of the first ratio and the second ratio can be identical or differs, and the second setting grayscale
Value can be more than the first setting grayscale value.Wherein, driving current of the display panel 11 according to the second setting grayscale value, being can be between aobvious
Show that panel 11 drives between the 65% to 75% of whole pixel light currents.The value of second ratio can between 0.74~0.55 it
Between, in the present embodiment, the second ratio be 0.72, and second setting grayscale value be, for example, for 215.Grayscale value 215 drives
The electric current of dynamic display panel 11, is equal to display panel 11 drives whole pixel light currents 70%.
It holding, image-processing circuit 121 of the invention first calculates the average gray-scale value of all pixels in a display picture, and
When 0≤average gray-scale value<When first setting grayscale value (such as 145), the first video signal S1 does not change；When the first setting ash
Rank value (such as 145)≤average gray-scale value<When second setting grayscale value (such as 215), each grayscale of the first video signal S1
Value is to be multiplied by the first ratio (such as 0.8) and become the second video signal S2；Grayscale value (such as 215)≤average are set when second
When grayscale Zhi≤highest grayscale value (such as 255), then each grayscale value of the first video signal S1 be second ratio that is multiplied by (such as
0.72) become third video signal.In this, first sets grayscale value sets grayscale value as the 215, first ratio as 145, second
For 0.8 and second ratio be 0.72 only to illustrate, user it is of course possible to according to its demand using different first settings grayscale values,
Second setting grayscale value, the first ratio and the second ratio.
In addition, having the presence of the second setting grayscale value and the second ratio in the present embodiment, but, in other embodiments
In, user can not use the second setting grayscale value and the second ratio yet, and only use the first setting grayscale value and the first ratio.
In other words, in other embodiments, when the first equal grayscale Zhi of setting grayscale Zhi≤Ping≤highest grayscale value (such as 255), shadow
As each grayscale value of the first video signal S1 can be multiplied by a ratio respectively by processing circuit 121, to obtain the second video signal
S2.In addition, user can also set more setting grayscale values and its ratio according to different display devices certainly, such as can set
Determine third setting grayscale value, the 4th setting grayscale value, third ratio and the 4th ratio etc..Such as third setting grayscale can be set
Value works as average gray-scale value and is greater than or equal to the first setting grayscale between the first setting grayscale value and the second setting grayscale value
When being worth, and setting grayscale value less than a third, image-processing circuit 121 can reduce the first video signal according to a third ratio
Grayscale value and become one the 4th video signal, or do not limited in this for other setting means.
When image-processing circuit 121 generates the second video signal S2 or third video signal or four video signal, number
It can receive according to driving circuit 122, and according to the second video signal S2 or the driving display of third video signal or the 4th video signal
Panel 11 shows image.In this, data drive circuit 122 can correspond to one data drive signal of output according to the video signal of reception
Display panel 11 is driven to show image.In other words, when data drive circuit 122 receives the image that image-processing circuit 121 exports
When signal, data drive circuit 122 can correspond to output data drive signal according to the video signal, and data drive signal can divide
These the described pixels for not controlling the display panel 11 send out corresponding light, to show image frame.
In this example it is shown that each pixel of panel 11 can be respectively provided with a driving transistor and a light-emitting component
(Organic Light Emitting Diode), wherein driving transistor can control light-emitting component to shine.And the number that data drive circuit 122 exports
It can pass through data line D according to drive signalnThe grid of the driving transistor of each pixel is inputted, the luminous member of each pixel is thereby can control
The light emission luminance of part.Since when showing that the average gray-scale value of picture is greater than or equal to the first setting grayscale value, image processing is electric
Road 121 reduced video signal output grayscale value, therefore data drive circuit 122 export data drive signal all grayscale
Voltage also reduces, therefore the light emission luminance of the light-emitting component of all pixels also reduces so that the electric current of driving display panel 11 also drops
It is low, therefore the power consumption of display device 1 can also reduce.
It is worth noting that, when show picture average gray-scale value it is relatively low when, represent display device 1 show picture by point
The ratio of bright pixel is less, therefore the present invention does not turn down the grayscale value of the first video signal S1, so viewer is contributed to see clearly
Chu shows image.But, when show picture average gray-scale value it is higher when, represent display device 1 display picture in by point
The ratio of bright pixel is higher, and due to having more pixel that can emit beam in display image, therefore the present invention turns down the first image letter
The grayscale value of number S1, and then display device 1 is made to show that the overall brightness of picture reduces, for viewer, although display picture
The overall brightness in face reduces, but due to there is more pixel that can emit beam in picture, therefore viewer is not easy to find,
Its rating quality is not influenced.
In addition, referring to shown in Fig. 2 and Fig. 3, wherein Fig. 3 is a kind of display device of present pre-ferred embodiments
Image control method flow diagram.
As shown in Fig. 2, display device 1 includes a display panel 11 and a drive module 12.Drive module 12 includes one
Image-processing circuit 121, data drive circuit 122 and a scan drive circuit 123.Wherein, the technical characteristic of display device 1 can
With reference to above-mentioned, repeated no more in this.
In addition, as shown in figure 3, the image control method of the display device of the present invention is to may include step S01 to step
S04。
In step S01, as shown in Fig. 2, being one first image for receiving a picture frame time by image-processing circuit 121
Signal S1.In this, a picture frame time is exactly the time needed for one picture of display of display device 1, therefore the first video signal S1
Tool drives whole grayscale values of all pixels of display panel 11 there are one in display picture.
Then, it is when an average gray-scale value of the first video signal S1 is greater than or equal to one first setting in step S02
Grayscale value, and less than one second setting grayscale value when, by image-processing circuit 121 according to one first ratio reduce the first image
The grayscale value of signal S1 and become one second video signal S2.Wherein, driving of the display panel 11 according to the first setting grayscale value
Electric current is 10% to 30% that whole pixel light currents are driven between display panel 11.In this, the first ratio is 0.8, and the
One setting grayscale value be for 145, and grayscale value 145 drive display panel 11 electric current, be approximately equal to highest grayscale value
(255) the 30% of the driving current for lighting all pixels of display panel 11.
In addition, in step S03, grayscale value is set when average gray-scale value is greater than or equal to second, and be less than highest grayscale
When value, the grayscale value of the first video signal S1 is reduced according to one second ratio by image-processing circuit 121 by becomes a third
Video signal.In this, driving current of the display panel 11 according to the second setting grayscale value, is that can be driven between display panel 11 entirely
Between the 65% to 75% of portion's pixel light current.In the present embodiment, the second ratio be 0.72, and second setting grayscale value
E.g. for 215.Grayscale value 215 drives the electric current of display panel 11, is equal to display panel 11 and drives whole pixels
The 70% of light current.
Finally, after the judgement and processing for executing average gray-scale value, step S04 is can perform, is by data-driven electricity
Road 122 exports data drive signal driving display panel 11 according to the second video signal S2 or third video signal and shows shadow
Picture.It is to control the display panel 11 multiple pixels respectively by data drive signal to emit beam, to show image in this.Separately
Outside, it is by the grid of a driving transistor of each pixel of data drive signal difference input display panel 11, to control respectively
The light emission luminance of one light-emitting component of pixel.
In addition, the other feature of the image control method of display device of the present invention is no longer gone to live in the household of one's in-laws on getting married in being described in detail among the above in this
It states.
In addition, please respectively refer to shown in Fig. 4 A and Fig. 4 B, wherein Fig. 4 A are to apply in image control method of the invention,
The brightness of the point bright pixel of two kinds of different display devices and the schematic diagram for lighting area (on area) percentage, and Fig. 4 B are to answer
In image control method with the present invention, the power consumption of the point bright pixel of two kinds of different display devices accounts for whole elemental areas hundred
Divide the schematic diagram of ratio.In this, be measure one display picture driving current and all light picture driving current ratio (such as
30：100) how many percentages for lighting area can, be corresponded to.In addition, the present invention is measured with average gray-scale value and all light ash
After rank value drives the electric current ratio of display panel, such as obtain in a manner of look-up table (look-up table) pixel light face
Long-pending percentage.In addition, the brightness of display panel point bright pixel is the brightness of highest grayscale value.
Wherein, the horizontal axis of Fig. 4 A and Fig. 4 B respectively represent in the display image of display device, and pixel lights the percentage of area
Than the longitudinal axis of Fig. 4 A represents the brightness for being lit pixel, and the longitudinal axis of Fig. 4 B represents the consumption power of two kinds of display devices.Separately
Outside, solid line A ', the B ' of Fig. 4 A and Fig. 4 B is the song for indicating two kinds of different display devices without using the image control method of the present invention
Line, and dotted line A, B are the curves for indicating two kinds of different display devices using the image control method of the present invention.
In the present embodiment, by the first setting grayscale value for 145, grayscale value 145 drives the electric current of display panel 11,
Equal to the 30% of the driving current for all pixels of display panel 11 being lighted with highest grayscale value (255), that is, light area
30% (present invention can be light area 10%~30% between).Therefore, as shown in Figure 4 A, when being lit elemental area ratio
After 30%, the brightness of dotted line A and B are reduced because of the first ratio (0.8), therefore dotted line A, B, when more than 30%, brightness curve is very
It turns right soon lower inclination, in other words, dotted line A, B have a first slope before lighting the 30% of area, and dotted line A, B are in lighting
There is one second slope, and first slope is to differ with the second slope after the 30% of area, and the absolute value of the second slope
Be greater than first slope absolute value (present invention can be light area 10%~30% between).
In addition, the second setting grayscale value of the present embodiment is for 215, and grayscale value 215 drives display panel 11
Electric current is equal to display panel 11 drives whole pixel light currents 70%, that is, light area 70% (present invention can be point
Between the 65%~75% of bright area).Therefore, when display panel is lit after elemental area is more than 70%, (the second ratio is
0.72), dotted line A, B is turned right lower inclination with another slope again, and in other words, dotted line A, B have one after lighting the 70% of area
Third slope, and third slope is to differ, and the absolute value of the second slope is greater than the absolute of third slope with the second slope
Value (present invention can be light area 65%~75% between).
In addition, as shown in Figure 4 B, when the percentage for lighting area is more and more high, the power consumption of display device is also more and more
It is high.But, by Fig. 4 B it will be evident that when lighting area and being more than 30%, the power consumption of image control method of the invention
Curve A, B it is higher with area is lighted, it will be apparent that than without using the power consumption profile A ' of image control method of the present invention, B ' reductions
Very much.
Last is mentioned that, by taking organic LED display device as an example, when showing a webpage, due on webpage
It shows in picture, the ratio usually shared by white portion is higher, is shown according to statistics, the average work(of the display picture of webpage
Consumption is 75% or so of the power consumption that picture is all displayed in white, is also approximately equivalent to a bright pixel and accounts for whole elemental areas
75% or so, therefore, its power consumption can be reduced using the image control method of the present invention as described above.
In addition, according to statistics, if organic LED display device shows movie or television picture, picture is shown
Average power consumption be 20% or so of the power consumption that is all displayed in white of picture (to be approximately equivalent to light elemental area and account for whole pixels
Area 20% or so).If in addition, when the static images such as display photo, the average power consumption of display picture is that picture is all shown
23% or so (be approximately equivalent to a bright pixel and account for whole elemental areas 23% or so) of the power consumption of white.Two kinds of above-mentioned displays
Picture, although its power consumption is relatively low, but, still moderately its power more can be reduced using the image control method of the present invention
Consumption.
In conclusion there is the drive module of display device of the present invention an image-processing circuit can receive a picture frame time
One first video signal, and when an average gray-scale value of the first video signal is greater than or equal to one first setting grayscale value, shadow
Become one second video signal as processing circuit can reduce the grayscale value of the first video signal according to one first ratio.In addition,
Data drive circuit can receive the second video signal, and show image according to the second video signal driving display panel.With it is known
It compares, the present invention can control the gray scale voltage of data drive circuit output in response to the grayscale value of different display images, make display
Panel has lower driving current, and then display device is made to have lower power consumption.
The foregoing is merely illustratives, rather than are restricted person.Any spirit and scope without departing from the present invention, and to it
The equivalent modifications of progress or change should all be included in claim.
Claims (13)
1. a kind of organic light-emitting diode (OLED) display apparatus, which is characterized in that the organic light-emitting diode (OLED) display apparatus includes：
One display panel；And
One drive module is electrically connected with the display panel, and the display panel is driven to show image,
Wherein, the brightness of the display panel point bright pixel and light area percentage have a curve, the curve in less than
One first when lighting area percentage there is a first slope, the curve to have when lighting area percentage more than described first
There are one second slope, the absolute value of second slope to be more than the absolute value of the first slope.
2. organic light-emitting diode (OLED) display apparatus as described in claim 1, which is characterized in that described first lights area percentage
Than between 10% to 30%.
3. organic light-emitting diode (OLED) display apparatus as described in claim 1, which is characterized in that the display panel point bright pixel
When area percentage lights area percentage more than described first, the brightness of the display panel is dropped according to one first ratio
It is low.
4. organic light-emitting diode (OLED) display apparatus as claimed in claim 3, which is characterized in that first ratio is between 0.9
Between 0.75.
5. organic light-emitting diode (OLED) display apparatus as described in claim 1, which is characterized in that the curve is in more than one second
When lighting area percentage there is a third slope, the third slope to be differed with second slope, described second lights
Area percentage lights area percentage more than described first.
6. organic light-emitting diode (OLED) display apparatus as claimed in claim 5, which is characterized in that the absolute value of second slope
More than the absolute value of the third slope.
7. organic light-emitting diode (OLED) display apparatus as claimed in claim 5, which is characterized in that described second lights area percentage
Than between 65% to 75%.
8. organic light-emitting diode (OLED) display apparatus as claimed in claim 5, which is characterized in that the display panel point bright pixel
When area percentage lights area percentage more than described second, the brightness of the display panel is dropped according to one second ratio
It is low.
9. organic light-emitting diode (OLED) display apparatus as claimed in claim 8, which is characterized in that second ratio is between 0.74
Between 0.55.
10. a kind of organic light-emitting diode (OLED) display apparatus, which is characterized in that the organic light-emitting diode (OLED) display apparatus includes：
One display panel；And
One drive module is electrically connected with the display panel, and the display panel is driven to show image,
Wherein, when the display panel shows that the average power consumption that picture is static image shows that picture is between the display panel
The average power consumption of movie or television picture and the display panel are shown between the average power consumption that picture is webpage.
11. organic light-emitting diode (OLED) display apparatus as claimed in claim 10, which is characterized in that the display panel shows picture
Face is the average power consumption of webpage, show the power consumption that picture is all displayed in white for the display panel 75%.
12. organic light-emitting diode (OLED) display apparatus as claimed in claim 10, which is characterized in that the display panel shows picture
Face is the average power consumption of static image, show the power consumption that picture is all displayed in white for the display panel 23%.
13. organic light-emitting diode (OLED) display apparatus as claimed in claim 10, which is characterized in that the display panel shows picture
Face is the average power consumption of movie or television picture, show the power consumption that picture is all displayed in white for the display panel 20%.
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| 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 |
| 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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| CN103578391B (en) | 2016-02-17 |
| CN105632406A (en) | 2016-06-01 |
| CN103578391A (en) | 2014-02-12 |
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