CN106920520B - Gamma correcting circuit, display driver chip and display device - Google Patents
Gamma correcting circuit, display driver chip and display device Download PDFInfo
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- CN106920520B CN106920520B CN201710296186.3A CN201710296186A CN106920520B CN 106920520 B CN106920520 B CN 106920520B CN 201710296186 A CN201710296186 A CN 201710296186A CN 106920520 B CN106920520 B CN 106920520B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
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- 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
Abstract
The present invention provides a kind of Gamma(gamma) correcting circuit, display driver chip and display device.The Gamma correcting circuit includes Gamma correction look-up table storage unit and Gamma correction processing unit, the Gamma correction processing unit is for receiving the raw video signal from video signal processing unit, and look-up table is corrected according to Gamma, raw video signal is corrected, to obtain correction rear video signal, and correction rear video signal is sent to analog data voltage output unit.The present invention can make when the display controlled the display panel using multiple display driver chips, so that the source data output voltage of multiple display driver chips is able to maintain unanimously in same gray level.
Description
Technical field
The present invention relates to (gamma) the alignment technique field Gamma more particularly to a kind of Gamma correcting circuits, display driving
Chip and display device.
Background technique
In AMOLED (active matrix organic light-emitting diode) display, exported by the source data of display driver chip logical
The limitation of road quantity may take more display driver chip splicings to realize high-resolution display.But due to IC
The limitation of (Integrated Circuit, integrated circuit) process capability, the IC produced using same design and technique, even if together
A batch time is produced, and between different IC, under identical grayscale, the voltage of source data output channel output still has certain difference
It is different；And such difference will lead to two IC and cascade or splice in use, causing the difference for respectively driving picture brightness.
Summary of the invention
The main purpose of the present invention is to provide a kind of Gamma correcting circuit, display driver chip and display devices, solve
When the display controlled the display panel in the prior art using multiple display driver chips, the source electrode number of multiple display driver chips
It can cannot be consistent according to output voltage in same gray level, with meeting since in IC, (Integrated Circuit integrates electricity
Road) caused voltage differences cause the minor differences of display picture in technique, the perceptible splicing of human eye is generated in tiled display
The problem of line.
In order to achieve the above object, the present invention provides a kind of Gamma correcting circuits, are applied to display driver chip, institute
Stating display driver chip includes video signal processing unit and analog data voltage output unit, the Gamma correcting circuit packet
Include Gamma correction look-up table storage unit and Gamma correction processing unit, wherein
Gamma correction look-up table is stored in the Gamma correction look-up table storage unit；
The input terminal of the Gamma correction processing unit is connect with the output end of the video signal processing unit, described
The output end of Gamma correction processing unit is connect with the input terminal of the analog data voltage output unit；The Gamma correction
Processing unit is also connect with Gamma correction look-up table storage unit；
The Gamma correction processing unit is used to receive the raw video signal from the video signal processing unit,
And look-up table is corrected according to the Gamma, the raw video signal is corrected, to obtain correction rear video signal, and will
The correction rear video signal is sent to the analog data voltage output unit.
When implementation, the display driver chip further include Power Management Unit and with the analog data voltage output unit
The Gamma voltage generating unit of connection, the Power Management Unit are used to provide Gamma for the Gamma voltage generating unit
Input voltage；
The Gamma correcting circuit further includes the first power reference monitoring unit；
The first power reference monitoring unit respectively with the control terminal of the Gamma correction processing unit and the power supply
Administrative unit connection, the Gamma input electricity for being provided to the Gamma voltage generating unit for monitoring the Power Management Unit
The voltage value of pressure, and when the voltage value of the Gamma input voltage is within the scope of scheduled voltage to the Gamma correction process
Unit exports enabling signal, when the voltage value of the Gamma input voltage is not within the scope of scheduled voltage to the school Gamma
Positive processing unit output interrupt signal and to the Power Management Unit output voltage control signal；
When the control terminal of the Gamma correction processing unit receives the enabling signal, the Gamma correction process
Unit is started to work, when the control terminal of the Gamma correction processing unit receives the interrupt signal, the school Gamma
Positive processing unit interruption of work；
When the Power Management Unit receives the interrupt signal, the Power Management Unit outputting standard Gamma
Input voltage is to the Gamma voltage generating unit；
The voltage value of the standard Gamma input voltage is within the scope of the scheduled voltage.
When implementation, Gamma correcting circuit of the present invention further includes second source benchmark monitoring unit；The display is driven
Dynamic chip further includes the Gamma voltage generating unit connecting with the analog data voltage output unit；
The second source benchmark monitoring unit respectively with the output end of the Gamma voltage generating unit, outside Gamma
Voltage input end is connected with Gamma correction look-up table storage unit, for what is inputted according to external Gamma voltage input end
The practical Gamma voltage that external Gamma voltage and the Gamma voltage generating unit are exported by its output end, described in amendment
Gamma corrects the Gamma in look-up table storage unit and corrects look-up table.
The present invention also provides a kind of display driver chips, including video signal processing unit and analog data voltage output
Unit further includes above-mentioned Gamma correcting circuit；
The input terminal for the Gamma correction processing unit that the Gamma correcting circuit includes and the video frequency signal processing list
The output end connection of member, the input of the output end of the Gamma correction processing unit and the analog data voltage output unit
End connection；
The video signal processing unit is for handling external video signal, to obtain raw video signal, and
The raw video signal is sent to the input terminal of the Gamma correction processing unit；
The analog data voltage output unit is used to receive the school of the output end from the Gamma correction processing unit
Positive rear video signal, and obtained according to the correction rear video signal and export corresponding analog data voltage.
When implementation, display driver chip of the present invention further includes Gamma voltage generating unit and Power Management Unit；
The Gamma correcting circuit further includes first voltage benchmark monitoring unit；The Power Management Unit and the Gamma voltage produce
Raw unit connection, for providing Gamma input voltage for the Gamma voltage generating unit；The Gamma voltage generating unit
For generating the analog data voltage for corresponding to each grayscale according to the Gamma input voltage；
The Gamma correcting circuit further includes the first power reference monitoring unit；
The first power reference monitoring unit respectively with the control terminal of the Gamma correction processing unit and the power supply
Administrative unit connection, the Gamma input electricity for being provided to the Gamma voltage generating unit for monitoring the Power Management Unit
The voltage value of pressure, and when the voltage value of the Gamma input voltage is within the scope of scheduled voltage to the Gamma correction process
Unit exports enabling signal, when the voltage value of the Gamma input voltage is not within the scope of scheduled voltage to the school Gamma
Positive processing unit output interrupt signal and to the Power Management Unit output voltage control signal；
When the control terminal of the Gamma correction processing unit receives the enabling signal, the Gamma correction process
Unit is started to work, when the control terminal of the Gamma correction processing unit receives the interrupt signal, the school Gamma
Positive processing unit interruption of work；
When the Power Management Unit receives the interrupt signal, the Power Management Unit outputting standard Gamma
Input voltage is to the Gamma voltage generating unit；
The voltage value of the standard Gamma input voltage is within the scope of the scheduled voltage.
When implementation, display driver chip of the present invention further includes second source benchmark monitoring unit；
The second source benchmark monitoring unit respectively with the output end of the Gamma voltage generating unit, outside Gamma
Voltage input end is connected with Gamma correction look-up table storage unit, for what is inputted according to external Gamma voltage input end
The practical Gamma voltage that external Gamma voltage and the Gamma voltage generating unit are exported by its output end, described in amendment
Gamma corrects the Gamma in look-up table storage unit and corrects look-up table；
The output of Gamma voltage generating unit in the external Gamma voltage input end and another display driver chip
End connection.
When implementation, display driver chip of the present invention further includes control interface and data output interface；The Gamma
The control terminal of voltage generating unit is connect with the control interface, the Gamma correction look-up table storage unit and the control
Interface connection, the output end of the Gamma voltage generating unit are connect with the data output interface.
The present invention also provides a kind of Gamma bearing calibrations, applied to above-mentioned display driver chip, the school Gamma
Correction method includes:
Gamma aligning step: Gamma correction processing unit receives the original video letter from video signal processing unit
Number, and correct the Gamma correction look-up table stored in look-up table storage unit according to Gamma and the raw video signal is carried out
The correction rear video signal to obtain correction rear video signal, and is sent to analog data voltage output unit by correction.
When implementation, when the display driver chip includes that Gamma voltage generating unit, control interface and data output connect
Mouthful, the control terminal of the Gamma voltage generating unit connect with the control interface, the Gamma voltage generating unit it is defeated
When outlet is connect with the data output interface, the Gamma bearing calibration is before the Gamma aligning step further include:
Gamma corrects look-up table generation step: by described in the external control signal control from the control interface
Gamma voltage generating unit is generated and is exported and exports corresponding to realistic simulation data voltage to the data of multiple predetermined grayscale
Interface corresponds to the realistic simulation data voltage of multiple predetermined grayscale according to detecting and obtain and corresponds to multiple predetermined
The standard analog data voltage of grayscale obtains Gamma correction look-up table, is looked into Gamma correction by the control interface
Look for table that the Gamma correction look-up table storage unit is written.
The present invention also provides a kind of display devices, including above-mentioned display driver chip.
Compared with prior art, Gamma correcting circuit, display driver chip and display device of the present invention can make
When the proper display controlled the display panel using multiple display driver chips, so that the source data of multiple display driver chips
Output voltage is able to maintain unanimously in same gray level, avoids leading in IC (Integrated Circuit, integrated circuit) technique
The voltage differences of cause cause the minor differences of display picture, can be used for tiled display, avoid generating the perceptible splicing line of human eye.
Detailed description of the invention
Fig. 1 is the structure chart of Gamma correcting circuit described in the embodiment of the present invention；
Fig. 2 is the structure chart of Gamma correcting circuit described in another embodiment of the present invention；
Fig. 3 is the structure chart of Gamma correcting circuit described in further embodiment of this invention；
Fig. 4 is the structure chart of Gamma correcting circuit described in another embodiment of the present invention；
Fig. 5 is the circuit diagram of the first specific embodiment of Gamma correcting circuit of the present invention；
Fig. 6 is the structure chart of display device described in the embodiment of the present invention；
Fig. 7 is the circuit diagram of the second specific embodiment of Gamma correcting circuit of the present invention；
Fig. 8 is the structure chart of display device described in another 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.
Gamma correcting circuit described in the embodiment of the present invention is applied to display driver chip, the display driver chip packet
Video signal processing unit and analog data voltage output unit are included, the Gamma correcting circuit includes Gamma correction look-up table
Storage unit and Gamma correction processing unit, wherein
Gamma correction look-up table is stored in the Gamma correction look-up table storage unit；
The input terminal of the Gamma correction processing unit is connect with the output end of the video signal processing unit, described
The output end of Gamma correction processing unit is connect with the input terminal of the analog data voltage output unit；The Gamma correction
Processing unit is also connect with Gamma correction look-up table storage unit；
The Gamma correction processing unit is used to receive the raw video signal from the video signal processing unit,
And look-up table is corrected according to the Gamma, the raw video signal is corrected, to obtain correction rear video signal, and will
The correction rear video signal is sent to the analog data voltage output unit.
The so-called vision signal of the application can be digital video signal, such as display card, processor etc. and pass through HDMI
(High Definition Multimedia Interface, high-definition multimedia interface) digital interface, DisplayPort
A kind of (DisplayPort is high-definition digital display interface standard) digital interface, DVI (DigitalVisual Interface,
Digital visual interface) etc. digital interfaces input digital video signal the school Gamma can be directly entered for digital video signal
Positive circuit is handled；It can also be analog video signal, such as the analog video signal inputted by VGA, simulation regarded
Frequency signal enters Gamma correcting circuit after can handling it by analog-digital converter and handles.In the following embodiments, in order to
Simplify statement, the technical solution of the application is illustrated by taking digital video signal as an example.
Gamma correcting circuit described in the present invention will now be explained with reference to the accompanying drawings:
Gamma correcting circuit described in the embodiment of the present invention is applied to display driver chip；
The display driver chip includes digital video signal processing unit and analog data voltage output unit；
As shown in Figure 1, Gamma correcting circuit described in the embodiment of the present invention includes Gamma correction look-up table storage unit
11 and Gamma correction processing unit 12, wherein
Gamma correction look-up table is stored in the Gamma correction look-up table storage unit 11；
The input terminal of the Gamma correction processing unit 12 is connect with the output end of digital video signal processing unit 21,
The output end of the Gamma correction processing unit 12 is connect with the input terminal of the analog data voltage output unit 22；It is described
Gamma correction processing unit 12 is also connect with Gamma correction look-up table storage unit 11；
The Gamma correction processing unit 12 is for receiving the original number from the digital video signal processing unit 21
Word vision signal, and look-up table is corrected according to the Gamma, the raw digital video signal is corrected, to be corrected
Digital video signal afterwards, and the correction rear video signal is sent to the analog data voltage output unit 22.
Gamma correcting circuit described in the embodiment of the present invention includes Gamma correction look-up table storage unit 11 and Gamma
Correction processing unit 12, Gamma correction processing unit 12 correct look-up table to from digital video signal processing list according to Gamma
The raw digital video signal of member 21 is corrected, to obtain correction rear video signal.By using described in the embodiment of the present invention
Gamma correcting circuit can make when the display controlled the display panel using multiple display driver chips so that multiple
The source data output voltage of display driver chip is able to maintain unanimously in same gray level, is avoided in IC (Integrated
Circuit, integrated circuit) caused voltage differences cause the minor differences of display picture in technique, and it can be used for tiled display, keep away
Exempt to generate the perceptible splicing line of human eye.
Specifically, as shown in Fig. 2, the display driver chip further include Power Management Unit 23 and with the analogue data
The Gamma voltage generating unit 24 that voltage output unit 22 connects, the Power Management Unit 23 are used to be the Gamma voltage
It generates unit 24 and Gamma input voltage is provided；
As shown in Fig. 2, Gamma correcting circuit described in the embodiment of the present invention further includes the first power reference monitoring unit
13；
The first power reference monitoring unit 13 respectively with the control terminal of the Gamma correction processing unit 12 and described
Power Management Unit 23 connects, and is provided to the Gamma voltage generating unit 24 for monitoring the Power Management Unit 23
The voltage value of Gamma input voltage, and the Xiang Suoshu when the voltage value of the Gamma input voltage is within the scope of scheduled voltage
Gamma correction processing unit 12 exports enabling signal, when the voltage value of the Gamma input voltage is not within the scope of scheduled voltage
When to the Gamma correction processing unit 12 export interrupt signal and to 23 output voltage control of Power Management Unit believe
Number；
When the control terminal of the Gamma correction processing unit 12 receives the enabling signal, at the Gamma correction
Unit 12 is managed to start to work, it is described when the control terminal of the Gamma correction processing unit 12 receives the interrupt signal
12 interruption of work of Gamma correction processing unit；
When the Power Management Unit 23 receives the interrupt signal, 23 outputting standard of Power Management Unit
Gamma input voltage is to the Gamma voltage generating unit 24；
The voltage value of the standard Gamma input voltage is within the scope of the scheduled voltage.
In practical operation, the Power Management Unit 23 is used to provide Gamma input for Gamma voltage generating unit 24
Voltage；
First power reference monitoring unit 13 monitoring Power Management Unit 24 is provided to Gamma voltage generating unit 24
The voltage value of Gamma input voltage, and Gamma correction processing unit 12 is controlled when the voltage value is within the scope of scheduled voltage
Gamma correction process is carried out, when the voltage value is not within the scope of scheduled voltage, the first power reference monitoring unit 13 is to institute
It states Gamma correction processing unit 12 and exports interrupt signal and to 23 output voltage control signal of Power Management Unit, so that
23 outputting standard Gamma input voltage of Power Management Unit is obtained to Gamma voltage generating unit 24.
In practical operation, the Gamma voltage generating unit 24 is used to generate basis according to the Gamma input voltage
Gamma voltage generating unit input voltage and partial pressure mode calculate the voltage value corresponding to grayscale at different levels.The scheduled voltage
The preset energy of correction work range of operating voltage range combination Gamma correction processing unit of the range based on display panel
The Gamma voltage ceiling voltage and minimum voltage range enough handled.For example, the groundwork voltage range when display panel is
When 1V-5V, which can be set as 0.5V-6.5V；When the first power reference monitoring unit 13 is supervised
Measure Power Management Unit 24 be provided to Gamma voltage generating unit 24 Gamma input voltage voltage value be 6V when, institute
It states the first power reference monitoring unit 13 control Gamma correction processing unit 12 and carries out Gamma correction process；When first electricity
Source benchmark monitoring unit 13, which monitors, obtains the Gamma input electricity that Power Management Unit 24 is provided to Gamma voltage generating unit 24
When the voltage value of pressure is 7V namely the voltage value of the Gamma input voltage is not within the scope of scheduled voltage, then the first power supply
Benchmark monitoring unit 13 exports interrupt signal to the Gamma correction processing unit 12 and exports to the Power Management Unit 23
Voltage control signal, so that 23 outputting standard Gamma input voltage (the standard Gamma input voltage of Power Management Unit
Also to preset, the voltage value of standard Gamma input voltage is within the scope of the scheduled voltage, standard Gamma
The voltage value of input voltage, such as can be 6V) to Gamma voltage generating unit 24.
As shown in figure 3, Gamma correcting circuit described in the embodiment of the present invention can also include that the monitoring of second source benchmark is single
Member 14；The display driver chip further includes that the Gamma voltage connecting with the analog data voltage output unit 22 generates list
Member 24；
The second source benchmark monitoring unit 14 respectively with the output end of the Gamma voltage generating unit 24, outside
Gamma voltage input end GI and Gamma correction look-up table storage unit 11 connects, for defeated according to external Gamma voltage
The practical Gamma that the external Gamma voltage and the Gamma voltage generating unit 24 for entering to hold GI to input are exported by its output end
Voltage corrects the Gamma correction look-up table in the Gamma correction look-up table storage unit 11.
In practical operation, with one in multiple display driver chips for main display driver chip, and other displays
Driving chip is that the Gamma voltage from display driver chip, with the Gamma voltage generating unit output of main display driver chip is
Standard corrects the Gamma voltage from display driver chip.
Display driver chip described in the embodiment of the present invention, including digital video signal processing unit and analog data voltage
Output unit further includes above-mentioned Gamma correcting circuit；
At the input terminal and the digital video signal of the Gamma correction processing unit that the Gamma correcting circuit includes
Manage the output end connection of unit, the output end of the Gamma correction processing unit and the analog data voltage output unit
Input terminal connection；
The digital video signal processing unit is for handling external digital video signal, to obtain original figure
Vision signal, and the raw digital video signal is sent to the input terminal of the Gamma correction processing unit；
The analog data voltage output unit is used to receive the school of the output end from the Gamma correction processing unit
Digital video signal after just, and obtained according to digital video signal after the correction and export corresponding analog data voltage.
Specifically, display driver chip described in the embodiment of the present invention can also include Gamma voltage generating unit and electricity
Source control unit；The Gamma correcting circuit further includes first voltage benchmark monitoring unit；The Power Management Unit with it is described
Gamma voltage generating unit connection, for providing Gamma input voltage for the Gamma voltage generating unit；The Gamma
Voltage generating unit is used to generate the analog data voltage for corresponding to each grayscale according to the Gamma input voltage；
The Gamma correcting circuit further includes the first power reference monitoring unit；
The first power reference monitoring unit respectively with the control terminal of the Gamma correction processing unit and the power supply
Administrative unit connection, the Gamma input electricity for being provided to the Gamma voltage generating unit for monitoring the Power Management Unit
The voltage value of pressure, and when the voltage value of the Gamma input voltage is within the scope of scheduled voltage to the Gamma correction process
Unit exports enabling signal, when the voltage value of the Gamma input voltage is not within the scope of scheduled voltage to the school Gamma
Positive processing unit output interrupt signal and to the Power Management Unit output voltage control signal；
When the control terminal of the Gamma correction processing unit receives the enabling signal, the Gamma correction process
Unit is started to work, when the control terminal of the Gamma correction processing unit receives the interrupt signal, the school Gamma
Positive processing unit interruption of work；
When the Power Management Unit receives the interrupt signal, the Power Management Unit outputting standard Gamma
Input voltage is to the Gamma voltage generating unit；
The voltage value of the standard Gamma input voltage is within the scope of the scheduled voltage.
Specifically, display driver chip described in the embodiment of the present invention can also include second source benchmark monitoring unit；
The second source benchmark monitoring unit respectively with the output end of the Gamma voltage generating unit, outside Gamma
Voltage input end is connected with Gamma correction look-up table storage unit, for what is inputted according to external Gamma voltage input end
The practical Gamma voltage that external Gamma voltage and the Gamma voltage generating unit are exported by its output end, described in amendment
Gamma corrects the Gamma in look-up table storage unit and corrects look-up table；
The output of Gamma voltage generating unit in the external Gamma voltage input end and another display driver chip
End connection.
In practical operation, as shown in figure 4, display driver chip described in the embodiment of the present invention further includes control interface 41
With data output interface 42；The control terminal of the Gamma voltage generating unit 24 is connect with the control interface 41, described
Gamma correction look-up table storage unit 11 is connect with the control interface 41, the output end of the Gamma voltage generating unit 24
It is connect with the data output interface 42.
It in initial Gamma timing, needs to first pass through detection and obtains Gamma correction look-up table, namely need by coming
The generation of Gamma voltage generating unit 24 is controlled from the external control signal of the control interface 41 and is exported corresponding to multiple
The realistic simulation data voltage of predetermined grayscale corresponds to multiple pre- to the data output interface 42 according to detecting and obtain
Determine the realistic simulation data voltage of grayscale and the standard analog data voltage corresponding to multiple predetermined grayscale, obtains the school Gamma
The Gamma is corrected look-up table by the control interface 41 and the Gamma correction look-up table storage list is written by positive look-up table
Member 11 (namely the Gamma that first carry out in following Gamma bearing calibrations corrects look-up table generation step), therefore Gamma voltage
The needs of unit 24 are generated to connect with control interface 41 and data output interface 42.
In practical operation, as shown in figure 4, the analog data voltage output unit 22 also with the data output interface
42 connections.
Gamma bearing calibration described in the embodiment of the present invention, applied to above-mentioned display driver chip, the school Gamma
Correction method includes:
Gamma aligning step: Gamma correction processing unit receives the original video letter from video signal processing unit
Number, and correct the Gamma correction look-up table stored in look-up table storage unit according to Gamma and the raw video signal is carried out
The correction rear video signal to obtain correction rear video signal, and is sent to analog data voltage output unit by correction.
In Gamma bearing calibration described in the embodiment of the present invention, so-called vision signal can be digital video signal,
Such as display card, processor etc. pass through HDMI (High Definition MultimediaInterface, the more matchmakers of fine definition
Body interface) digital interface, a kind of DisplayPort (DisplayPort is high-definition digital display interface standard) digital interface,
The digital video signal of the digital interfaces such as DVI (Digital Visual Interface, digital visual interface) input, for number
Word vision signal can be directly entered Gamma correcting circuit and be handled；It can also be analog video signal, such as defeated by VGA
The analog video signal entered enters Gamma correcting circuit after can handling it by analog-digital converter for analog video signal
It is handled.In the following embodiments, in order to simplify statement, illustrate described in the embodiment of the present invention by taking digital video signal as an example
The technical solution of Gamma bearing calibration.
In the specific implementation, when the display driver chip includes that Gamma voltage generating unit, control interface and data are defeated
The control terminal of outgoing interface, the Gamma voltage generating unit is connect with the control interface, the Gamma voltage generating unit
Output end when being connect with the data output interface, the Gamma bearing calibration is also wrapped before the Gamma aligning step
It includes:
Gamma corrects look-up table generation step: by described in the external control signal control from the control interface
Gamma voltage generating unit is generated and is exported and exports corresponding to realistic simulation data voltage to the data of multiple predetermined grayscale
Interface corresponds to the realistic simulation data voltage of multiple predetermined grayscale according to detecting and obtain and corresponds to multiple predetermined
The standard analog data voltage of grayscale obtains Gamma correction look-up table, is looked into Gamma correction by the control interface
Look for table that the Gamma correction look-up table storage unit is written.
Namely before carrying out Gamma correction, needs first to generate Gamma correction look-up table, need by from the control
The external control signal of interface controls the Gamma voltage generating unit and generates and export the reality corresponding to multiple predetermined grayscale
Analog data voltage corresponds to the realistic simulation of multiple predetermined grayscale to the data output interface according to detecting and obtain
Data voltage and standard analog data voltage corresponding to multiple predetermined grayscale obtain Gamma correction look-up table, by described
Gamma correction look-up table is written the Gamma and corrects look-up table storage unit by control interface.
Display device described in the embodiment of the present invention includes above-mentioned display driver chip.
Illustrate display driver chip of the present invention below by two specific embodiments.
As shown in figure 5, the first specific embodiment of display driver chip of the present invention includes video interface 51, control
Interface 41, data output interface 42, digital video signal processing unit 21, analog data voltage output unit 22, power management
Unit 23, Gamma voltage generating unit 24 and Gamma correcting circuit；
The Gamma correcting circuit includes Gamma correction look-up table storage unit 11,12 and of Gamma correction processing unit
First power reference monitoring unit 13；
Gamma correction LUT (look-up table) is stored in the Gamma correction look-up table storage unit 11；
The video interface 51 is connect with the digital video signal processing unit 21；External digital video signal passes through institute
It states video interface 51 and accesses the digital video signal processing unit 21, external digital video signal is extractable by format conversion
For video data and synchrodata；
The control interface 41 is for receiving chip controls order or the logic control instruction for pullup or pulldown；
The output end of the input terminal of the Gamma correction processing unit 12 and the digital video signal processing unit 21 connects
It connects, the output end of the Gamma correction processing unit 12 is connect with the input terminal of the analog data voltage output unit 22；
The digital video signal processing unit 21 be used for the video data extracted from external digital video signal into
Row processing, to obtain raw digital video signal, and is sent to the Gamma correction process for the raw digital video signal
The input terminal of unit 12；
The digital video signal processing unit 21 may include the data compressing module being sequentially connected in series, data decompression mould
Block, data control block, image enhancement module, SPR (Subpixel Rendering.Sub-pixel rendering processing) algorithm process mould
Block and number Gamma processing module, the number Gamma processing unit carry out Gamma pretreatment to video data；
The Gamma correction processing unit 12 corrects the data of LUT (look-up table) according to Gamma, to corresponding gray number
According to processing is compensated, then digital video signal after the correction is sent to described by digital video signal after being corrected
Analog data voltage output unit 22；
The analog data voltage output unit 22 is for receiving the output end from the Gamma correction processing unit 12
Correction after digital video signal, and obtained according to digital video signal after the correction and export corresponding analog data voltage；
In the specific implementation, the analog data voltage output unit 22 includes the data latch module being sequentially connected in series, number
According to adjustment module and D/A converter module；Digital video signal is sent to data after data point reuse, digital-to-analogue conversion after correction
Output interface 42.Analog data voltage output unit 22 is according to output control sequential, by source data voltage output；The number
Output interface 42 can be multichannel, such as can be used for the display of FHD (Full High Definition, full HD) and drive core
The data output interface of piece has 1080 × 2 or 1080 × 3 channels；
In practical operation, the first specific embodiment of display driver chip of the present invention can also include clock pipe
It manages unit (Clock Managing Unit is not shown in Figure 5), the Clock Managing Unit is for managing in display driver chip
Control sequential；
For managing input and output power supply, be supplied to internal logic unit and analog circuit makes the Power Management Unit 23
With；
The Power Management Unit 23 is connect with the Gamma voltage generating unit 24, for producing for the Gamma voltage
Raw unit 24 provides Gamma input voltage；
The Gamma voltage generating unit 24, which is used to be generated according to the Gamma input voltage, corresponds to each grayscale
Analog data voltage；
The analog data voltage output unit 22 is connect with the Gamma voltage generating unit 24, is used for the Gamma
The analog data voltage corresponding to each grayscale generated in voltage generating unit 24 converts digital video signal after the correction
For corresponding analog video signal and export；
The first power reference monitoring unit 13 respectively with the control terminal of the Gamma correction processing unit 12 and described
Power Management Unit 23 connects, and is provided to the Gamma voltage generating unit 24 for monitoring the Power Management Unit 23
The voltage value of Gamma input voltage, and the Xiang Suoshu when the voltage value of the Gamma input voltage is within the scope of scheduled voltage
Gamma correction processing unit 12 exports enabling signal, starts to carry out the school Gamma to control the Gamma correction processing unit 12
Positive processing, when the voltage value of the Gamma input voltage is not within the scope of scheduled voltage to the Gamma correction processing unit
12 output interrupt signals and to the Power Management Unit output voltage control signal；
When the control terminal of the Gamma correction processing unit 12 receives the enabling signal, at the Gamma correction
Unit 12 is managed to start to work, it is described when the control terminal of the Gamma correction processing unit 12 receives the interrupt signal
12 interruption of work of Gamma correction processing unit；
When the Power Management Unit 23 receives the interrupt signal, 23 outputting standard of Power Management Unit
Gamma input voltage is to the Gamma voltage generating unit；
The voltage value of the standard Gamma input voltage is within the scope of the scheduled voltage.
It further include GOA (Gate in the first specific embodiment of display driver chip of the present invention in practical operation
The drive element of the grid in array substrate is arranged in On Array) waveform generation unit, GOA voltage conversion unit and GOA data
Output unit (is not shown in Figure 5), to export the clock signal for controlling external GOA circuit work.
It is with digital video signal original in the first specific embodiment of display driver chip of the present invention below
8bit (bit), the digital video signal processing unit 21 are 10bit, and the Gamma correction processing unit 12 is for 12bit
Example explanation；
Assuming that the highest Gamma input voltage of Gamma voltage generating unit 24 is Umax, Gamma voltage generating unit 24
Minimum Gamma input voltage be Umin, then when the Gamma voltage generating unit 24 is corresponded to using linear equal part to generate
When the analog data voltage of each grayscale, then average every step voltage difference Up is equal to (Umax-Umin)/212, when the digital video
When the raw digital video signal that processing unit 21 exports is n (10bit), and corresponding to n's in Gamma correction look-up table
When Gamma corrected value is x, after the correction that the Gamma correction processing unit 12 exports digital video signal be n ' (12bit)+
X, n ' it is that n is switched into 12 system numbers obtained after 2 systems move to left 2；
If the Gamma voltage generating unit 24 is not that linear equal part is generated using linear equal part corresponding to each ash
When the analog data voltage of rank, it can be calculated according to Gamma voltage generating unit input voltage and partial pressure mode corresponding at different levels
The voltage value of grayscale.
First specific embodiment of present invention display driver chip as shown in Figure 5 needs first to generate Gamma when leaving the factory
Look-up table is corrected, concrete operations process is as follows:
The Gamma voltage generating unit 24 is controlled by the external control signal from the control interface 41 to generate simultaneously
Output corresponds to the realistic simulation data voltage of multiple predetermined grayscale to the data output interface 42, the institute obtained according to detection
State the realistic simulation data voltage corresponding to multiple predetermined grayscale and the standard analog data electricity corresponding to multiple predetermined grayscale
Pressure obtains Gamma correction look-up table, the Gamma is corrected look-up table by the control interface 41, the school Gamma is written
Positive look-up table storage unit 11.
For example, highest Gamma input voltage is that 6.5V can be calculated flat in this way when minimum Gamma input voltage is 0.5V
Every step voltage difference Up=6V/212, i.e. Up is equal to 1.46mV；Then pair of the Gamma voltage generating unit reality output
Should be in the analog data voltage and standard analog data voltage of each grayscale, and the several Up of difference are recorded in Gamma correction and are searched
In table.Such as when the realistic simulation data voltage for corresponding to grayscale 128 is 1.022V, difference -3；When corresponding to grayscale 4032
Realistic simulation data voltage be 6.124V, difference 6.
In use, since Gamma input voltage can be variant, by the first power reference monitoring unit 13 to power management
Unit 23 is that the Gamma input voltage that Gamma voltage generating unit provides measures, to calculate the non-school of every grade of Gamma voltage
Output valve under the conditions of standard can correct look-up table according to Gamma and compensate when falling in normalization voltage range.
As shown in fig. 6, display device described in the embodiment of the present invention may include AMOLED (Active-matrix
Organic light emitting diode, active matrix organic light-emitting diode) display screen 60, the first display driver chip
61 and second display driver chip 62, first display driver chip 61 and second display driver chip 62 are simultaneously to institute
It states AMOLED display screen 60 and carries out display driving.In practical operation, display device described in the embodiment of the present invention includes aobvious
Show that the number of driving chip can also be greater than 2.
As shown in fig. 7, the second specific embodiment video interface 51, the control interface of display driver chip of the present invention
41, data output interface 42, digital video signal processing unit 21, analog data voltage output unit 22, Power Management Unit
23, Gamma voltage generating unit 24 and Gamma correcting circuit；
The Gamma correcting circuit includes Gamma correction look-up table storage unit 11,12 and of Gamma correction processing unit
Second source benchmark monitoring unit 14；
Gamma correction LUT (look-up table) is stored in the Gamma correction look-up table storage unit 11；
The video interface 51 is connect with the digital video signal processing unit 21；External digital video signal passes through institute
It states video interface 51 and accesses the digital video signal processing unit 21, external digital video signal is extractable by format conversion
For video data and synchrodata；
The control interface 41 is for receiving chip controls order or the logic control instruction for pullup or pulldown；
The output end of the input terminal of the Gamma correction processing unit 12 and the digital video signal processing unit 21 connects
It connects, the output end of the Gamma correction processing unit 12 is connect with the input terminal of the analog data voltage output unit 22；
The digital video signal processing unit 21 be used for the video data extracted from external digital video signal into
Row processing, to obtain raw digital video signal, and is sent to the Gamma correction process for the raw digital video signal
The input terminal of unit 12；
The digital video signal processing unit 21 may include the data compressing module being sequentially connected in series, data decompression mould
Block, data control block, image enhancement module, SPR (Subpixel Rendering.Sub-pixel rendering processing) algorithm process mould
Block and number Gamma processing module, the number Gamma processing unit carry out Gamma pretreatment to video data；
The Gamma correction processing unit 12 corrects the data of LUT (look-up table) according to Gamma, to corresponding gray number
According to processing is compensated, then digital video signal after the correction is sent to described by digital video signal after being corrected
Analog data voltage output unit 22；
The analog data voltage output unit 22 is for receiving the output end from the Gamma correction processing unit 12
Correction after digital video signal, and obtained according to digital video signal after the correction and export corresponding analog data voltage；
In the specific implementation, the analog data voltage output unit 22 includes the data latch module being sequentially connected in series, number
According to adjustment module and D/A converter module；Digital video signal is sent to data after data point reuse, digital-to-analogue conversion after correction
Output interface 42.Analog data voltage output unit 22 is according to output control sequential, by source data voltage output；The number
Output interface 42 can be multichannel, such as can be used for the display of FHD (Full High Definition, full HD) and drive core
The data output interface of piece has 1080 × 2 or 1080 × 3 channels；
In practical operation, the second specific embodiment of display driver chip of the present invention can also include clock pipe
It manages unit (Clock Managing Unit is not shown in Fig. 7), the Clock Managing Unit is for managing in display driver chip
Control sequential；
For managing input and output power supply, be supplied to internal logic unit and analog circuit makes the Power Management Unit 23
With；
The Power Management Unit 23 is connect with the Gamma voltage generating unit 24, for producing for the Gamma voltage
Raw unit 24 provides Gamma input voltage；
The Gamma voltage generating unit 24, which is used to be generated according to the Gamma input voltage, corresponds to each grayscale
Analog data voltage；
The analog data voltage output unit 22 is connect with the Gamma voltage generating unit 24, is used for the Gamma
The analog data voltage corresponding to each grayscale generated in voltage generating unit 24 converts digital video signal after the correction
For corresponding analog video signal and export；
The second source benchmark monitoring unit 14 respectively with the output end of the Gamma voltage generating unit 24, outside
Gamma voltage input end GI and Gamma correction look-up table storage unit 11 connects, for defeated according to external Gamma voltage
The practical Gamma that the external Gamma voltage and the Gamma voltage generating unit 24 for entering to hold GI to input are exported by its output end
Voltage corrects the Gamma correction look-up table in the Gamma correction look-up table storage unit 11；
The external Gamma voltage input end GI is defeated with the Gamma voltage generating unit in another display driver chip
Outlet connection, then another display driver chip be main display driver chip, the second of display driver chip of the present invention
Specific embodiment is from display driver chip.By the Gamma of the Gamma voltage generating unit output in the main display driver chip
Voltage (namely by GI input external Gamma voltage) and from display driver chip Gamma voltage generating unit output
Practical Gamma voltage is all sent to second source benchmark monitoring unit 14, and the second source benchmark monitoring unit 14 is based on
The difference for calculating outside Gamma voltage He the practical Gamma voltage, corrects according to the difference and from display driver chip includes
Gamma corrects the Gamma in look-up table storage unit 11 and corrects look-up table.
It further include GOA (Gate in the second specific embodiment of display driver chip of the present invention in practical operation
The drive element of the grid in array substrate is arranged in On Array) waveform generation unit, GOA voltage conversion unit and GOA data
Output unit (is not shown) in Fig. 7, to export the clock signal for controlling external GOA circuit work.
Second specific embodiment of present invention display driver chip as shown in Figure 7 when leaving the factory, needs first to generate Gamma
Look-up table is corrected, it is raw to control the Gamma voltage generating unit 24 by the external control signal from the control interface 41
At and export correspond to multiple predetermined grayscale realistic simulation data voltage to the data output interface 42, obtained according to detection
The realistic simulation data voltage corresponding to multiple predetermined grayscale and the standard analog number corresponding to multiple predetermined grayscale
According to voltage, Gamma correction look-up table is obtained, is corrected the Gamma described in look-up table write-in by the control interface 41
Gamma corrects look-up table storage unit 11；
Before the second specific embodiment of present invention display driver chip as shown in Figure 7 formally shows driving work,
Correction mode can be used, to correct Gamma correction look-up table；It controls signal and main display driver chip is controlled by control interface
Gamma voltage generating unit and generate Gamma voltage, main display drive from the Gamma voltage generating unit of display driver chip
The Gamma voltage access of dynamic chip output from the external Gamma voltage input end of display driver chip, main display driver chip with
From display driver chip is synchronous Gamma voltage is input to second source benchmark monitoring unit step by step, is driven for calculating main display
Dynamic chip and the Gamma voltage differences from every grade of display driver chip are (on condition that the Gamma input voltage of main display driver chip
It is identical with the Gamma input voltage from display driver chip).
Second specific embodiment of present invention display driver chip as shown in Figure 7 can ensure defeated from display driver chip
Every grade of the Gamma voltage that the Gamma voltage of every grade out is exported with main display driver chip is consistent.Main display drives core
Piece can when leaving the factory precorrection it is good, from display driver chip according to main display driving calibrated.
As shown in figure 8, display device described in the embodiment of the present invention includes AMOLED display screen 80, main display driver chip
81 and from display driver chip 82, main display driver chip 81 and from display driver chip 82 together to AMOLED display screen 80 into
Row display driving, the Gamma voltage that main display driver chip 81 exports is accessed from display driver chip 82, in practical operation,
The number from display driver chip can be multiple.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of Gamma correcting circuit is applied to display driver chip, the display driver chip includes video frequency signal processing list
Member and analog data voltage output unit, which is characterized in that the Gamma correcting circuit includes Gamma correction look-up table storage
Unit and Gamma correction processing unit, wherein
Gamma correction look-up table is stored in the Gamma correction look-up table storage unit；
The input terminal of the Gamma correction processing unit is connect with the output end of the video signal processing unit, the Gamma
The output end of correction processing unit is connect with the input terminal of the analog data voltage output unit；The Gamma correction process
Unit is also connect with Gamma correction look-up table storage unit；
The Gamma correction processing unit is for receiving the raw video signal from the video signal processing unit, and root
The raw video signal is corrected according to Gamma correction look-up table, to obtain correction rear video signal, and will be described
Correction rear video signal is sent to the analog data voltage output unit；
The display driver chip further includes Power Management Unit and the Gamma that connect with the analog data voltage output unit
Voltage generating unit, the Power Management Unit are used to provide Gamma input voltage for the Gamma voltage generating unit；
The Gamma correcting circuit further includes the first power reference monitoring unit；
The first power reference monitoring unit respectively with the control terminal of the Gamma correction processing unit and the power management
Unit connection, the Gamma input voltage for being provided to the Gamma voltage generating unit for monitoring the Power Management Unit
Voltage value, and when the voltage value of the Gamma input voltage is within the scope of scheduled voltage to the Gamma correction processing unit
Enabling signal is exported, when the voltage value of the Gamma input voltage is not within the scope of scheduled voltage at the Gamma correction
Manage unit output interrupt signal and to the Power Management Unit output voltage control signal；
When the control terminal of the Gamma correction processing unit receives the enabling signal, the Gamma correction processing unit
It starts to work, when the control terminal of the Gamma correction processing unit receives the interrupt signal, at the Gamma correction
Manage unit interruption of work；
When the Power Management Unit receives the interrupt signal, the Power Management Unit outputting standard Gamma input
Voltage is to the Gamma voltage generating unit；
The voltage value of the standard Gamma input voltage is within the scope of the scheduled voltage.
2. Gamma correcting circuit as described in claim 1, which is characterized in that further include second source benchmark monitoring unit；Institute
Stating display driver chip further includes the Gamma voltage generating unit connecting with the analog data voltage output unit；
The second source benchmark monitoring unit respectively with the output end of the Gamma voltage generating unit, outside Gamma voltage
Input terminal is connected with Gamma correction look-up table storage unit, the outside for being inputted according to external Gamma voltage input end
The practical Gamma voltage that Gamma voltage and the Gamma voltage generating unit are exported by its output end, corrects the Gamma
The Gamma corrected in look-up table storage unit corrects look-up table.
3. a kind of display driver chip, including video signal processing unit and analog data voltage output unit, which is characterized in that
It further include Gamma correcting circuit as described in claim 1；
The input terminal and the video signal processing unit for the Gamma correction processing unit that the Gamma correcting circuit includes
The input terminal of output end connection, the output end of the Gamma correction processing unit and the analog data voltage output unit connects
It connects；
The video signal processing unit is for handling external video signal, to obtain raw video signal, and by institute
State the input terminal that raw video signal is sent to the Gamma correction processing unit；
After the analog data voltage output unit is used to receive the correction of the output end from the Gamma correction processing unit
Vision signal, and obtained according to the correction rear video signal and export corresponding analog data voltage；
The display driver chip further includes Gamma voltage generating unit and Power Management Unit；The Gamma correcting circuit
It further include first voltage benchmark monitoring unit；The Power Management Unit is connect with the Gamma voltage generating unit, for for
The Gamma voltage generating unit provides Gamma input voltage；The Gamma voltage generating unit is used for according to the Gamma
Input voltage generates the analog data voltage for corresponding to each grayscale；
The Gamma correcting circuit further includes the first power reference monitoring unit；
The first power reference monitoring unit respectively with the control terminal of the Gamma correction processing unit and the power management
Unit connection, the Gamma input voltage for being provided to the Gamma voltage generating unit for monitoring the Power Management Unit
Voltage value, and when the voltage value of the Gamma input voltage is within the scope of scheduled voltage to the Gamma correction processing unit
Enabling signal is exported, when the voltage value of the Gamma input voltage is not within the scope of scheduled voltage at the Gamma correction
Manage unit output interrupt signal and to the Power Management Unit output voltage control signal；
When the control terminal of the Gamma correction processing unit receives the enabling signal, the Gamma correction processing unit
It starts to work, when the control terminal of the Gamma correction processing unit receives the interrupt signal, at the Gamma correction
Manage unit interruption of work；
When the Power Management Unit receives the interrupt signal, the Power Management Unit outputting standard Gamma input
Voltage is to the Gamma voltage generating unit；
The voltage value of the standard Gamma input voltage is within the scope of the scheduled voltage.
4. display driver chip as claimed in claim 3, which is characterized in that further include second source benchmark monitoring unit；
The second source benchmark monitoring unit respectively with the output end of Gamma voltage generating unit, outside Gamma voltage input
End is connected with Gamma correction look-up table storage unit, the outside for being inputted according to external Gamma voltage input end
The practical Gamma voltage that Gamma voltage and the Gamma voltage generating unit are exported by its output end, corrects the Gamma
The Gamma corrected in look-up table storage unit corrects look-up table；
The output end of Gamma voltage generating unit in the external Gamma voltage input end and another display driver chip connects
It connects.
5. display driver chip as claimed in claim 3, which is characterized in that further include control interface and data output interface；
The control terminal of the Gamma voltage generating unit is connect with the control interface, Gamma correction look-up table storage unit with
The control interface connection, the output end of the Gamma voltage generating unit are connect with the data output interface.
6. a kind of Gamma bearing calibration, applied to the display driver chip as described in any claim in claim 3 to 5,
It is characterized in that, the Gamma bearing calibration includes:
Gamma aligning step: Gamma correction processing unit receives the raw video signal from video signal processing unit, and
The Gamma correction look-up table stored in look-up table storage unit is corrected according to Gamma to be corrected the raw video signal,
To obtain correction rear video signal, and the correction rear video signal is sent to analog data voltage output unit.
7. Gamma bearing calibration as claimed in claim 6, which is characterized in that when the display driver chip includes Gamma electricity
Pressure generates unit, control interface and data output interface, the control terminal of the Gamma voltage generating unit and the control interface
Connection, when the output end of the Gamma voltage generating unit is connect with the data output interface, the Gamma bearing calibration
Before the Gamma aligning step further include:
Gamma corrects look-up table generation step: controlling the Gamma electricity by the external control signal from the control interface
Pressure generates unit and generates and export realistic simulation data voltage corresponding to multiple predetermined grayscale to the data output interface, root
According to detection obtain described in correspond to multiple predetermined grayscale realistic simulation data voltage and corresponding to multiple predetermined grayscale
Standard analog data voltage obtains Gamma correction look-up table, is write Gamma correction look-up table by the control interface
Enter the Gamma correction look-up table storage unit.
8. a kind of display device, which is characterized in that including the display driving as described in any claim in claim 3 to 5
Chip.
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| CN107633809B (en) * | 2017-09-30 | 2019-05-21 | 京东方科技集团股份有限公司 | Eliminate method, display screen and the display device of more IC driving display screen concealed wires |
| CN108630145A (en) * | 2018-06-26 | 2018-10-09 | 江苏集萃有机光电技术研究所有限公司 | A kind of silicon substrate drive substrate and OLED display |
| CN108986731B (en) * | 2018-08-07 | 2021-10-08 | 京东方科技集团股份有限公司 | Display panel, compensation method thereof and display device |
| CN109658896B (en) | 2019-02-25 | 2021-03-02 | 京东方科技集团股份有限公司 | Gamma voltage generation circuit, driving circuit and display device |
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