CN110033735A - A kind of driving IC, OLED display panel and display device - Google Patents
A kind of driving IC, OLED display panel and display device Download PDFInfo
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- CN110033735A CN110033735A CN201910341326.3A CN201910341326A CN110033735A CN 110033735 A CN110033735 A CN 110033735A CN 201910341326 A CN201910341326 A CN 201910341326A CN 110033735 A CN110033735 A CN 110033735A
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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]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the present invention provides a kind of driving IC, OLED display panel and display device, is related to field of display technology, avoids the problem that short-term image retention under high contrast.A kind of driving IC includes: that gamma voltage generation unit, gray scale voltage generate unit and processing unit；Gamma voltage generation unit is connect with high voltage end, low-voltage end, N number of gamma reference voltage is generated according to the low-voltage of the high voltage of high voltage input terminal input and the input of low-voltage input terminal, each gamma reference voltage is exported by an one-to-one gamma reference voltage output end；Gray scale voltage generates unit and connect with N number of gamma reference voltage output end, and the data voltage of M+1 grayscale is generated according to N number of gamma reference voltage, and 0 to M grayscale data voltage is exported by the one-to-one 0th to m-th gray scale voltage output end；Processing unit judges whether current picture is black picture；If so, connecting the 0th gray scale voltage output end with high voltage end, if it is not, then disconnecting the connection.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of driving IC, OLED display panel and display device.
Background technique
Organic electroluminescent LED (Organic Light-Emitting Diode, OLED) display device have it is thin,
Gently, wide viewing angle, actively shine, luminescent color is continuously adjustable, at low cost, fast response time, energy consumption is small, driving voltage is low, work
The advantages that temperature range is wide, simple production process, high luminous efficiency, and become the hot spot for show that product pursues use instantly.
According to human eye to bright induction degree, it usually needs carry out gamma correction to display equipment to improve display effect
Fruit.
Summary of the invention
The embodiment of the present invention provides a kind of driving IC, OLED display panel and display device, can avoid under high contrast
The problem of short-term image retention.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, providing a kind of driving IC, comprising: gamma voltage generation unit, gray scale voltage generate unit and processing
Unit；The gamma voltage generation unit is connected with high voltage end, low-voltage end；The gamma voltage generation unit is configured to
According to the low-voltage of the high voltage of high voltage input terminal input and low-voltage input terminal input, N number of gamma base is generated
Quasi- voltage, and each gamma reference voltage is exported by an one-to-one gamma reference voltage output end；The grayscale
Voltage generating unit is connected with N number of gamma reference voltage output end；The gray scale voltage generates unit and is configured to according to N
The gamma reference voltage of a gamma reference voltage output end output, generates the data voltage of M+1 grayscale, and 0 arrives M
The data voltage of grayscale is exported as the one-to-one 0th to gray scale voltage output end described in m-th；The processing unit, configuration
To judge whether current picture is black picture；If so, the 0th gray scale voltage output end is made to be connected with the high voltage end
It connects；If it is not, then disconnecting the connection of the 0th gray scale voltage output end and the high voltage end.
Optionally, the processing unit includes data detection subelement, switch subelement and control subelement；The data
Detecting subelement is configured to detect current picture；The control subelement is configured to detect when the data detection subelement
When to measure current picture be black picture, control the switch subelement and open, otherwise, control the switch subelement closing；Institute
Switch subelement is stated to be configured to make the 0th gray scale voltage output end be connected with the high voltage end when opening；It is closing
Disconnect the connection of the 0th gray scale voltage output end and the high voltage end when closing.
Optionally, the switch subelement includes transistor；The grid of the transistor is connected with the control subelement
It connects, the first pole is connected with the high voltage input terminal, and the second pole is connected with the 0th gray scale voltage output end.
Optionally, the 1st gradually subtracts to the gamma reference voltage that gamma reference voltage output end described in n-th exports
It is small；Gray scale voltage output end described in k-th is connected with the 1st gamma reference voltage output end, by the 1st gamma
The gamma reference voltage of reference voltage output end output is exported as the data voltage of K grayscale；K is positive integer, and K≤3；
Gray scale voltage output end described in m-th is connected with gamma reference voltage output end described in n-th, by gamma base described in n-th
The gamma reference voltage of quasi- voltage output end output is exported as the data voltage of M grayscale.
Optionally, it includes N-1 first partial pressure subelement that the gray scale voltage, which generates unit,；The first partial pressure subelement
It is connected with P and the P+1 gamma reference voltage output ends；Each first partial pressure subelement is configured to basis
The gamma reference voltage of this two gamma reference voltage output end output, partial pressure obtain being located at two gammas
The data voltage of multiple grayscale between the gamma reference voltage of reference voltage output end output；N-1 >=P >=1, P are positive
Integer；In the case where K > 1, it further includes one second partial pressure subelement that the gray scale voltage, which generates unit,；Second partial pressure
Subelement is connected with gray scale voltage output end described in k-th；The second partial pressure subelement is configured to the ash according to k-th
The data voltage of the K grayscale of rank voltage output end output, partial pressure obtain 1 data voltage for arriving K-1 grayscale.
On this basis, optionally, the 0th gray scale voltage output end and the 1st gray scale voltage output end are straight
It connects connected；Alternatively, it further includes a third partial pressure subelement that the gray scale voltage, which generates unit,；Third partial pressure subelement with
The 1st gray scale voltage output end is connected；The third partial pressure subelement is configured to defeated according to the 1st gray scale voltage
The data voltage of 1 grayscale of outlet output, partial pressure obtain the data voltage of 0 grayscale.
Optionally, the gamma voltage generation unit includes the first gamma partial pressure subelement, the second gamma partial pressure subelement
Subelement is divided with third gamma；The first gamma partial pressure subelement is connected with the high voltage end and the low-voltage end
It connects；The first gamma partial pressure subelement is configured to the high voltage inputted according to the high voltage end and low-voltage end input
Low-voltage, partial pressure obtains first voltage and second voltage, and the first voltage is greater than the second voltage；The first voltage
It is exported by the first voltage output end, the second voltage is exported by the second voltage output end；Second gamma point
Pressure subelement is connected with the high voltage end and the first voltage output end；The second gamma partial pressure subelement is configured to
According to the first voltage of the high voltage of high voltage end input and first voltage output end output, partial pressure obtains the 1st
The gamma reference voltage, and exported by the 1st gamma reference voltage output end；Third gamma partial pressure subelement with
The first voltage output end is connected with the second voltage output end；The third gamma partial pressure subelement is configured to basis
The first voltage of first voltage output end output and the second voltage of second voltage output end output, partial pressure obtain the
2 to the N-1 gamma reference voltages, and corresponded by the 2nd to the N-1 gamma reference voltage output end
Output；Gamma reference voltage output end described in n-th is connected with the second voltage output end, and the second voltage is exported
The second voltage at end is exported as gamma reference voltage described in n-th.
Second aspect provides a kind of OLED display panel, including viewing area and peripheral region, is provided in the peripheral region
The driving IC stated；The driving IC is connected with the data line being set in the viewing area.
The third aspect provides a kind of display device, including above-mentioned OLED display panel.
The embodiment of the present invention provides a kind of driving IC, OLED display panel and display device, when processing unit judgement is worked as
When preceding picture is black picture, the 0th gray scale voltage output end is set to be connected with high voltage end, that is, to make the data voltage etc. of 0 grayscale
In the voltage of high voltage end, to guarantee the high contrast of display panel.On this basis, when processing unit judges current picture
When for non-black picture, the connection of the 0th gray scale voltage output end and high voltage end is disconnected, reduces by 0 grayscale under non-black picture
The difference of data voltage and the data voltage of 1 grayscale avoids short-term image retention so as to shorten the time that image retention disappears.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 a is a kind of schematic top plan view of display panel provided in an embodiment of the present invention；
Fig. 1 b is the structural schematic diagram in a kind of display panel provided in an embodiment of the present invention in sub-pix；
Fig. 2 is a kind of structural schematic diagram for driving IC provided in an embodiment of the present invention；
Fig. 3 a is the structural schematic diagram of another driving IC provided in an embodiment of the present invention；
Fig. 3 b is the structural schematic diagram of another driving IC provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another driving IC provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of another driving IC provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another driving IC provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another driving IC provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of display device, including OLED display panel.As shown in Figure 1a, OLED display panel
It for example encloses and is arranged around the area AA one including viewing area (area active area, abbreviation AA) and peripheral region S, peripheral region S.Above-mentioned AA
It include sub-pix (sub pixel) P of multiple color in area.The sub-pixel P of the multiple color includes at least the first color sub- picture
Element, the second color sub-pixels and third color sub-pixels, the first color, the second color and third color are that three primary colours are (such as red
Color, green and blue).For convenience of explanation, above-mentioned multiple sub-pix P are carried out for being arranged in matrix in the application
Explanation.
In the case, as shown in Figure 1a, the sub-pix P that X is arranged in a row in the horizontal direction is known as with a line sub-pix,
It can be connect with a grid line 1 with a line sub-pix.The sub-pix P that Y is arranged in a row along the vertical direction is known as same row Asia picture
Element, same row sub-pix can be connect with a data wire 2.
As shown in Figure 1 b, each sub-pix P includes pixel-driving circuit and OLED device.Pixel-driving circuit is generally by thin
The electronic devices such as film transistor (Thin Film Transistor, abbreviation TFT), capacitor (Capacitance, abbreviation C) composition.
For example, pixel-driving circuit can be and be made of two TFT (a switch TFT and one driving TFT) and a capacitor
The pixel-driving circuit of 2T1C structure；Certainly, pixel circuit can also be by more than two TFT (multiple switch TFT and one
Drive TFT) and at least one capacitor composition pixel-driving circuit.Wherein, regardless of which kind of structure pixel-driving circuit is, all must
It must include driving TFT, driving TFT can be connect with the anode of OLED device.
Above-mentioned OLED device includes cathode and anode, and the light emitting functional layer between cathode and anode.Wherein, it sends out
Light functional layer may include organic luminous layer, the hole transmission layer between organic luminous layer and anode, be located at organic light emission
Electron transfer layer between layer and cathode.It certainly, as needed in some embodiments, can also be in hole transmission layer and anode
Between hole injection layer is set, electron injecting layer can be set between electron transfer layer and cathode.
It should be noted that Fig. 1 b is only schematic diagram, the connection relationship of pixel-driving circuit and OLED device is not showed that
(can according to need the suitable pixel-driving circuit of selection in practice).
On the basis of the OLED display panel of foregoing description, as shown in Figure 1a, OLED display panel further includes that setting exists
Gate driving circuit, driving IC (Integrated Circuit, integrated circuit) of peripheral region S etc..Gate driving circuit and grid
Line 1 connects, and driving IC is connect with data line 2.In addition, display device can also include sequence controller, sequence controller and grid
Pole driving circuit, driving IC connection.
It should be noted that gate driving circuit can be directly produced in OLED display panel in array substrate, certainly,
The peripheral region of OLED display panel can also be arranged in gate driving circuit in the form of IC.In addition, gate driving circuit can also collect
At in above-mentioned driving IC, in the case, driving IC was both connect with data line 2, was also connect with grid line 1.
As shown in Fig. 2, the embodiment of the present invention provides a kind of driving IC, comprising: gamma voltage generation unit 10, gray scale voltage
Generate unit 20 and processing unit 30.
Gamma voltage generation unit 10 and high voltage end VG, low-voltage end VRIt is connected；Gamma voltage generation unit 10 configures
For according to high voltage end VGThe high voltage and low-voltage end V of inputRThe low-voltage of input generates N number of gamma reference voltage, and every
A gamma reference voltage is by one-to-one gamma reference voltage output end Vgamma1~VgammaNOutput.
Wherein, N number of gamma reference voltage is different.
Gray scale voltage generates unit 20 and N number of gamma reference voltage output end Vgamma1~VgammaNIt is connected；Gray scale voltage
Unit 20 is generated to be configured to according to N number of gamma reference voltage output end Vgamma1~VgammaNThe gamma reference voltage of output generates M
The data voltage of+1 grayscale, and 0 arrives the data voltage of M grayscale by the one-to-one 0th to m-th gray scale voltage output end
Vgray0~VgrayMOutput.
Wherein, the value of M can be determined according to such as under type: if the digit of display device data transmission is 6, there are 26It is a
Grayscale, grayscale value are 0~63, that is, M value is 63.If the digit of display device data transmission is 8, there are 28A grayscale,
Grayscale value is 0~255, that is, M value is 255.If the digit of display device data transmission is 10, there are 210A grayscale, ash
Rank value is 0~1023, that is, M value is 1023.
Correspondingly, gamma reference voltage number N, can be set, the present invention does not do specific setting herein accordingly.
By taking display device shows 256 grayscale as an example, gray scale voltage generates unit 20 can be with 9 gamma electric voltage output ends
Vgamma1~Vgamma9It is connected, and according to 9 gamma electric voltage output end Vgamma1~Vgamma9The gamma reference voltage of output generates
The data voltage of 256 grayscale, and the data voltage of 0 to 255 grayscale is defeated by the 0th to the 255th gray scale voltage correspondingly
Outlet Vgray0~Vgray255Output.
Based on above description, it is to be understood that the case where driving IC to connect with all data lines 2 on display panel
Under, driving IC includes that multiple gray scale voltages generate unit 20, and gray scale voltage generates the number of unit 20 and the number of data line 2
It is identical and connect one to one.For gamma voltage generation unit 10, one can be, in the case, each grayscale
Voltage generating unit 20 with N number of gamma reference voltage output end V of gamma voltage generation unit 10gamma1~VgammaNConnection.
Processing unit 30 is configured to judge whether current picture is black picture；If so, making the 0th gray scale voltage output
Hold Vgray0With high voltage end VGIt is connected；If it is not, then making the 0th gray scale voltage output end Vgray0With the connection of high voltage input terminal
It disconnects.
That is, the data voltage of 0 grayscale can be according to high voltage end V in the case where current picture is non-black pictureGInput
High voltage and low-voltage end VRThe low-voltage of input generates unit 20 by gamma voltage generation unit 10 and gray scale voltage and divides
Pressure obtains.And in the case where current picture is black picture, as the 0th gray scale voltage output end Vgray0With high voltage end VGIt is connected
When connecing, due to high voltage end VGVoltage be higher than and generate unit 20 above by gamma voltage generation unit 10 and gray scale voltage and divide
The data voltage of 0 obtained grayscale is pressed, therefore, the data voltage of 0 grayscale is equal to high voltage end V at this timeGThe high voltage of input.
The general display panel for Chang Bai (Normal White) mode, when testing the contrast of display panel,
In order to guarantee the case where black brightness is in the most limit under 0 grey menu (i.e. black picture), make the data voltage of 0 grayscale directly etc.
In high voltage end VGVoltage.In this way, the display panel for being 390Nit for maximum brightness, contrast can reach million grades
Not.
If either black picture is also non-black picture, the 0th gray scale voltage output end Vgray0With high voltage end VGAlways connect
It connects, then, no matter display panel shows which kind of picture, the data voltage of 0 grayscale are equal to high voltage end VGVoltage.
And since the data voltage of 1~255 grayscale is still to generate list by gamma voltage generation unit 10 and gray scale voltage
20 partial pressure of member obtains, and therefore, the data voltage of 0 grayscale differs bigger with the data voltage of 1 grayscale, but 0 grayscale and 1 grayscale
Corresponding luminance difference but very little.It is exemplary, for maximum brightness be 390Nit display panel, according to 2.2 standard of gamma into
Row correction, it is 0.002Nit that the brightness for obtaining 0 grayscale, which is the brightness of 0,1 grayscale, then the contrast of display panel can achieve
390/0.002=195000.Since the minimum brightness that general optical test equipment can be detected is 0.004Nit, so 0 ash
The luminance difference 0.002Nit of rank and 1 grayscale can be ignored.
Since the thin film transistor (TFT) in display panel is there are hysteresis effect, it is existing that display panel may have image retention
As.In the case where the data voltage of 0 grayscale differs bigger with the data voltage of 1 grayscale, carried out in short term to display panel
When image retention is tested, for example, display panel can be allowed to show 8 × 8 gridiron pattern picture, continue 1~5 minute, observation image retention disappears
Time.It is obtained according to test result, the data voltage of 0 grayscale is higher, and the time that image retention disappears is longer, is easy to appear short-term residual
Picture.
And in driving IC provided in an embodiment of the present invention, when processing unit 30 judges current picture for black picture, make the 0th
A gray scale voltage output end Vgray0With high voltage end VGIt is connected, that is, the data voltage of 0 grayscale is made to be equal to high voltage end VGElectricity
Pressure, to guarantee the high contrast of display panel.On this basis, when processing unit 30 judges current picture for non-black picture
When, make the 0th gray scale voltage output end Vgray0With high voltage end VGConnection disconnect, reduce the data of 0 grayscale under non-black picture
The difference of voltage and the data voltage of 1 grayscale avoids short-term image retention so as to shorten the time that image retention disappears.
Optionally, as shown in Figure 3a, processing unit 30 includes data detection subelement 303, switch subelement 301 and control
Subelement 302.
Data detection subelement 303 is configured to detect current picture.
Control subelement 302 is configured to when it is black picture that data detection subelement 303, which detects current picture, and control is opened
Climax unit 301 is opened, and otherwise, control switch subelement is closed.
Switch subelement 301 is configured to make the 0th gray scale voltage output end and high voltage end V when openingGIt is connected；?
Disconnect the connection of the 0th gray scale voltage output end and high voltage input terminal when closing.
On this basis, as shown in Figure 3b, optionally, switch subelement 301 includes transistor T；The grid of transistor T with
Control subelement 302 is connected, the first pole and the defeated V of high voltageGIt is connected, the second pole and the 0th gray scale voltage output end Vgray0
It is connected.
When it is black picture that data detection subelement 303, which detects current picture, control subelement 302 controls transistor T
Conducting, high voltage end VGVoltage can be directly passed to the 0th gray scale voltage output end Vgray0, so that the data voltage of 0 grayscale
Equal to high voltage end VGVoltage.
Optionally, the 1st n-th gamma electric voltage output end V is arrivedgamma1~VgammaNThe gamma reference voltage of output gradually subtracts
It is small.In the case, as shown in Figure 4, Figure 5 and Figure 6, k-th gray scale voltage output end VgrayKWith the 1st gamma electric voltage output end
Vgamma1It is connected, by the 1st gamma electric voltage output end Vgamma1The gamma reference voltage of output is defeated as the data voltage of K grayscale
Out；K is positive integer, and K≤3；M-th gray scale voltage output end VgrayMWith n-th gamma electric voltage output end VgammaNIt is connected,
By n-th gamma electric voltage output end VgammaNThe gamma reference voltage of output is exported as the data voltage of M grayscale.
Gamma voltage generation unit 10 is according to high voltage end VGWith low-voltage end VRThe one group of high voltage and low-voltage of input,
It is divided, is obtained and gamma reference voltage output end Vgamma1~VgammaNN number of gamma reference voltage of output is corresponded, the
1 gamma reference voltage is gradually reduced to n-th gamma reference voltage.
For example, gamma reference voltage output end Vgamma1The 1st gamma reference voltage is exported, can refer to high voltage end VG's
High voltage is divided to obtain, gamma reference voltage output end VgammaNN-th gamma reference voltage is exported, can refer to low-voltage
Hold VRLow-voltage divided to obtain, the 1st gamma reference voltage is greater than n-th gamma reference voltage.
As K=1, as shown in figure 4, the 1st gray scale voltage output end Vgray1With the 1st gamma electric voltage output end Vgamma1
It is connected, by the 1st gamma electric voltage output end Vgamma1The gamma reference voltage of output is exported as the data voltage of 1 grayscale.
As K=2, as shown in figure 5, the 2nd gray scale voltage output end Vgray2With the 1st gamma electric voltage output end Vgamma1
It is connected, by the 1st gamma electric voltage output end Vgamma1The gamma reference voltage of output is exported as the data voltage of 2 grayscale.Its
In, the 1st gray scale voltage output end Vgray1The data voltage of 1 grayscale of output, can refer to the 2nd gray scale voltage output end
Vgray2The data voltage of 2 grayscale of output is obtained by partial pressure.
As K=3, as shown in fig. 6, the 3rd gray scale voltage output end Vgray2With the 1st gamma electric voltage output end Vgamma1
It is connected, by the 1st gamma electric voltage output end Vgamma1The gamma reference voltage of output is exported as the data voltage of 3 grayscale.Its
In, the 1st gray scale voltage output end Vgray1The data voltage and the 2nd gray scale voltage output end V of 1 grayscale of outputgray2Output
2 grayscale data voltage, the 3rd gray scale voltage output end V can be referred togray2The data voltage of 3 grayscale of output is by dividing
Pressure obtains.
On this basis, optionally, as shown in Figure 4-Figure 6, it includes N-1 first partial pressure that gray scale voltage, which generates unit 20,
Unit 201；First partial pressure subelement 201 is connected with P and the P+1 gamma electric voltage output end；Each first partial pressure
Unit 201 is configured to the gamma reference voltage exported according to two gamma electric voltage output ends, and partial pressure obtains being located at two gals
The data voltage of multiple grayscale between the gamma reference voltage of horse voltage output end output；N-1 >=P >=1, P are positive integer.
Exemplary, the first partial pressure subelement 201 includes multiple series resistances.According to the adjacent of gamma electric voltage output end output
Two gamma reference voltages, the first partial pressure subelement 201 is divided by series resistance, from corresponding multiple gray scale voltages outputs
End, exports the data voltage of multiple grayscale.
As shown in Figure 5 and Figure 6, in the case where K > 1, it further includes one second partial pressure that gray scale voltage, which generates unit 20,
Unit 202；Second partial pressure subelement 202 and k-th gray scale voltage output end VgraykIt is connected；Second partial pressure subelement 202 is matched
It is set to according to k-th gray scale voltage output end VgraykThe data voltage of the K grayscale of output, partial pressure obtain 1 data for arriving K-1 grayscale
Voltage.
That is, as shown in figure 5, second divides subelement 202 and the 2nd gray scale voltage output end V as K=2gray2It is connected
It connects, the second partial pressure subelement 202 is according to the 2nd gray scale voltage output end Vgray2The data voltage of 2 grayscale of output, partial pressure obtain
The data voltage of 1 grayscale.As shown in fig. 6, as K=3, the second partial pressure subelement 202 and the 3rd gray scale voltage output end Vgray3
It is connected, the second partial pressure subelement 202 is according to the 3rd gray scale voltage output end Vgray3The data voltage of 3 grayscale of output, partial pressure
Obtain the data voltage of 1 grayscale and 2 grayscale.
Based on this, it is ensured that the data voltage of 1 grayscale is based on gamma framework and divides to obtain, to guarantee to show currently
In the case where for non-black picture, the data voltage difference between 0 grayscale and 1 grayscale is smaller, to avoid short-term image retention.
Optionally, the 0th gray scale voltage output end Vgray0With the 1st gray scale voltage output end Vgray1It is connected directly.
That is, the data voltage of 0 grayscale is equal to the data voltage of 1 grayscale in the case where currently showing non-black picture.To
So that the data voltage of 0 grayscale and the data voltage difference of 1 grayscale are smaller under non-black picture.
Alternatively, as shown in Figure 4-Figure 6, it further includes a third partial pressure subelement 203 that gray scale voltage, which generates unit 20,；Third
Partial pressure subelement 203 is connected with the 1st gray scale voltage output end；Third partial pressure subelement is configured to according to the 1st grayscale electricity
The data voltage of 1 grayscale of output end output is pressed, partial pressure obtains the data voltage of 0 grayscale.
That is, subelement 203 is divided by third, by the 1st gray scale voltage output end Vgray1The 1 luma data electricity of output
Pressure, partial pressure obtains the data voltage of 0 grayscale, so that the data voltage of 0 grayscale is approximate with the data voltage of 1 grayscale.So that
The data voltage of 0 grayscale and the data voltage difference of 1 grayscale are smaller under non-black picture.
Optionally, as shown in fig. 7, gamma voltage generation unit 10 includes that the first gamma divides subelement 101, the second gamma
It divides subelement 102 and third gamma divides subelement 103.
First gamma divides subelement 101 and high voltage end VGWith low-voltage end VRIt is connected；First gamma divides subelement
101 are configured to according to high voltage end VGThe high voltage and low-voltage end V of inputRThe low-voltage of input, partial pressure obtain first voltage and
Second voltage, first voltage are greater than second voltage；First voltage is by first voltage output end V1Output, second voltage is by the second electricity
Press output end V2Output.
Second gamma divides subelement 102 and high voltage end VGWith first voltage output end V1It is connected；Second gamma partial pressure
Subelement 102 is configured to according to high voltage end VGThe high voltage and first voltage output end V of input1The first voltage of output, partial pressure
The 1st gamma reference voltage is obtained, and is exported by the 1st gamma electric voltage output end.
Third gamma divides subelement 103 and first voltage output end V1With second voltage output end V2It is connected；Third gal
Horse partial pressure subelement 103 is configured to according to first voltage output end V1The first voltage and second voltage output end V of output2Output
Second voltage, partial pressure obtains the 2nd to the N-1 gamma reference voltage, and by the output of the 2nd to the N-1 gamma electric voltage
End corresponds output；N-th gamma electric voltage output end and second voltage output end V2It is connected, by second voltage output end V2
Second voltage as n-th gamma reference voltage export.
Exemplary, it is single that the first gamma divides subelement 101, the second gamma partial pressure subelement 102 and third gamma partial pressure
Member 103 includes by multiple concatenated resistance.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of driving IC characterized by comprising gamma voltage generation unit, gray scale voltage generate unit and processing unit；
The gamma voltage generation unit is connected with high voltage end, low-voltage end；The gamma voltage generation unit is configured to
According to the low-voltage of the high voltage of high voltage input terminal input and low-voltage input terminal input, N number of gamma base is generated
Quasi- voltage, and each gamma reference voltage is exported by an one-to-one gamma reference voltage output end；
The gray scale voltage generates unit and is connected with N number of gamma reference voltage output end；The gray scale voltage generates single
Member is configured to generate the number of M+1 grayscale according to the gamma reference voltage of N number of gamma reference voltage output end output
It is exported as the one-to-one 0th to gray scale voltage output end described in m-th according to the data voltage of voltage, and 0 to M grayscale；
The processing unit is configured to judge whether current picture is black picture；If so, keeping the 0th gray scale voltage defeated
Outlet is connected with the high voltage end；If it is not, then making the connection of the 0th the gray scale voltage output end and the high voltage end
It disconnects.
2. driving IC according to claim 1, which is characterized in that the processing unit includes data detection subelement, opens
Climax unit and control subelement；
The data detection subelement is configured to detect current picture；
The control subelement is configured to when it is black picture that the data detection subelement, which detects current picture, described in control
It switchs subelement to open, otherwise, controls the switch subelement and close；
The switch subelement is configured to make the 0th gray scale voltage output end be connected with the high voltage end when opening
It connects；When closed disconnect the connection of the 0th gray scale voltage output end and the high voltage end.
3. driving IC according to claim 2, which is characterized in that the switch subelement includes transistor；The crystal
The grid of pipe is connected with the control subelement, and the first pole is connected with the high voltage input terminal, the second pole and the 0th institute
Gray scale voltage output end is stated to be connected.
4. driving IC according to claim 1, which is characterized in that the 1st is defeated to gamma reference voltage output end described in n-th
The gamma reference voltage out is gradually reduced；
Gray scale voltage output end described in k-th is connected with the 1st gamma reference voltage output end, by the 1st gal
The gamma reference voltage of horse reference voltage output end output is exported as the data voltage of K grayscale；K is positive integer, and K≤
3；
Gray scale voltage output end described in m-th is connected with gamma reference voltage output end described in n-th, by gal described in n-th
The gamma reference voltage of horse reference voltage output end output is exported as the data voltage of M grayscale.
5. driving IC according to claim 4, which is characterized in that it includes N-1 first that the gray scale voltage, which generates unit,
Divide subelement；
The first partial pressure subelement is connected with P and the P+1 gamma reference voltage output ends；Each described
One partial pressure subelement is configured to the gamma reference voltage according to this two gamma reference voltage output end output, partial pressure
Obtain being located at the number of multiple grayscale between the gamma reference voltage of this two gamma reference voltage output end output
According to voltage；N-1 >=P >=1, P are positive integer；
In the case where K > 1, it further includes one second partial pressure subelement that the gray scale voltage, which generates unit,；
The second partial pressure subelement is connected with gray scale voltage output end described in k-th；The second partial pressure subelement configuration
For the data voltage of the K grayscale of the output of the gray scale voltage output end according to k-th, it is electric to the data of K-1 grayscale that partial pressure obtains 1
Pressure.
6. driving IC according to claim 1-5, which is characterized in that the 0th gray scale voltage output end with
The 1st gray scale voltage output end is connected directly；Alternatively,
It further includes a third partial pressure subelement that the gray scale voltage, which generates unit,；The third partial pressure subelement and the 1st institute
Gray scale voltage output end is stated to be connected；The third partial pressure subelement is configured to defeated according to the 1st gray scale voltage output end
The data voltage of 1 grayscale out, partial pressure obtain the data voltage of 0 grayscale.
7. driving IC according to claim 1, which is characterized in that the gamma voltage generation unit includes the first gamma point
Subelement, the second gamma partial pressure subelement and third gamma is pressed to divide subelement；
The first gamma partial pressure subelement is connected with the high voltage end and the low-voltage end；The first gamma partial pressure
Subelement is configured to the low-voltage of the high voltage inputted according to the high voltage end and low-voltage end input, and partial pressure obtains the
One voltage and second voltage, the first voltage are greater than the second voltage；The first voltage is exported by the first voltage
End output, the second voltage are exported by the second voltage output end；
The second gamma partial pressure subelement is connected with the high voltage end and the first voltage output end；Second gal
Horse partial pressure subelement is configured to the first of the high voltage inputted according to the high voltage end and first voltage output end output
Voltage, partial pressure obtains the 1st gamma reference voltage, and is exported by the 1st gamma reference voltage output end；
The third gamma partial pressure subelement is connected with the first voltage output end and the second voltage output end；It is described
It is defeated that third gamma partial pressure subelement is configured to the first voltage and the second voltage that export according to the first voltage output end
The second voltage of outlet output, partial pressure obtain the 2nd to the N-1 gamma reference voltage, and by the 2nd to N-1
The gamma reference voltage output end corresponds output；Gamma reference voltage output end described in n-th and the second voltage
Output end is connected, and exports the second voltage of the second voltage output end as gamma reference voltage described in n-th.
8. a kind of OLED display panel, which is characterized in that including viewing area and peripheral region, setting has the right to want in the peripheral region
Seek the described in any item driving IC of 1-7；The driving IC is connected with the data line being set in the viewing area.
9. a kind of display device, which is characterized in that including OLED display panel according to any one of claims 8.
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| CN201910341326.3A CN110033735B (en) | 2019-04-25 | 2019-04-25 | Drive IC, OLED display panel and display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113409732A (en) * | 2021-06-30 | 2021-09-17 | 惠州华星光电显示有限公司 | Drive circuit and drive method of drive circuit |
| WO2022088017A1 (en) * | 2020-10-30 | 2022-05-05 | 京东方科技集团股份有限公司 | Driving method for display panel, storage medium, drive device, and display device |
| CN115631713A (en) * | 2022-11-09 | 2023-01-20 | 武汉天马微电子有限公司 | Driving module and driving method thereof, display panel and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040075631A1 (en) * | 2002-10-03 | 2004-04-22 | Advanced Display Inc. | Liquid crystal display |
| CN1645458A (en) * | 2004-01-21 | 2005-07-27 | 精工爱普生株式会社 | Driving circuit, electro-optical device, method of driving the same, and electronic apparatus |
| WO2008115651A1 (en) * | 2007-03-20 | 2008-09-25 | Leadis Technology, Inc. | Minimizing dark current in oled display using modified gamma network |
| CN102682715A (en) * | 2012-04-26 | 2012-09-19 | 京东方科技集团股份有限公司 | Gray scale voltage generating circuit and method, source driver IC and liquid crystal display (LCD) device |
| CN104252834A (en) * | 2014-05-27 | 2014-12-31 | 四川虹视显示技术有限公司 | AMOLED (Active Matrix/Organic Light Emitting Diode) low-gray characteristic compensation driving circuit |
| CN105225640A (en) * | 2014-06-05 | 2016-01-06 | 上海和辉光电有限公司 | A kind of black picture voltage compensating method of data driver of OLED display |
| KR20180043563A (en) * | 2016-10-20 | 2018-04-30 | 엘지디스플레이 주식회사 | Digital To Analog Conversion Circuit And Organic Light Emitting Display Device Including The Same |
-
2019
- 2019-04-25 CN CN201910341326.3A patent/CN110033735B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040075631A1 (en) * | 2002-10-03 | 2004-04-22 | Advanced Display Inc. | Liquid crystal display |
| CN1645458A (en) * | 2004-01-21 | 2005-07-27 | 精工爱普生株式会社 | Driving circuit, electro-optical device, method of driving the same, and electronic apparatus |
| WO2008115651A1 (en) * | 2007-03-20 | 2008-09-25 | Leadis Technology, Inc. | Minimizing dark current in oled display using modified gamma network |
| CN102682715A (en) * | 2012-04-26 | 2012-09-19 | 京东方科技集团股份有限公司 | Gray scale voltage generating circuit and method, source driver IC and liquid crystal display (LCD) device |
| CN104252834A (en) * | 2014-05-27 | 2014-12-31 | 四川虹视显示技术有限公司 | AMOLED (Active Matrix/Organic Light Emitting Diode) low-gray characteristic compensation driving circuit |
| CN105225640A (en) * | 2014-06-05 | 2016-01-06 | 上海和辉光电有限公司 | A kind of black picture voltage compensating method of data driver of OLED display |
| KR20180043563A (en) * | 2016-10-20 | 2018-04-30 | 엘지디스플레이 주식회사 | Digital To Analog Conversion Circuit And Organic Light Emitting Display Device Including The Same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022088017A1 (en) * | 2020-10-30 | 2022-05-05 | 京东方科技集团股份有限公司 | Driving method for display panel, storage medium, drive device, and display device |
| US12020639B2 (en) | 2020-10-30 | 2024-06-25 | Hefei Boe Optoelectronics Technology Co., Ltd. | Drive method of display panel, storage medium, drive device and display device |
| CN113409732A (en) * | 2021-06-30 | 2021-09-17 | 惠州华星光电显示有限公司 | Drive circuit and drive method of drive circuit |
| CN115631713A (en) * | 2022-11-09 | 2023-01-20 | 武汉天马微电子有限公司 | Driving module and driving method thereof, display panel and display device |
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|---|---|
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