CN106782314A - Power supply chip management system and method - Google Patents

Power supply chip management system and method Download PDF

Info

Publication number
CN106782314A
CN106782314A CN201611228634.8A CN201611228634A CN106782314A CN 106782314 A CN106782314 A CN 106782314A CN 201611228634 A CN201611228634 A CN 201611228634A CN 106782314 A CN106782314 A CN 106782314A
Authority
CN
China
Prior art keywords
voltage
making
power supply
grey decision
supply chip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201611228634.8A
Other languages
Chinese (zh)
Other versions
CN106782314B (en
Inventor
张书环
王峥
朱修剑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Govisionox Optoelectronics Co Ltd
Kunshan Guoxian Photoelectric Co Ltd
Original Assignee
Kunshan Guoxian Photoelectric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunshan Guoxian Photoelectric Co Ltd filed Critical Kunshan Guoxian Photoelectric Co Ltd
Priority to CN201611228634.8A priority Critical patent/CN106782314B/en
Publication of CN106782314A publication Critical patent/CN106782314A/en
Application granted granted Critical
Publication of CN106782314B publication Critical patent/CN106782314B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection

Abstract

The present invention relates to a kind of power supply chip management system and method, the power supply chip management method is comprised the following steps：Detection image to be displayed, obtains the grey decision-making of each pixel of image to be displayed；Grey decision-making according to pixel searches voltage parameter look-up table, obtains the voltage of each pixel；Voltage parameter look-up table stores the corresponding relation of grey decision-making and voltage；Voltage according to each pixel calculates screen body load voltage, and according to screen body load voltage and the screen body impedance computation screen body load current value of display panel；The output voltage of the output duty cycle regulation power supply chip according to screen body load current value regulation pulse-modulated signal.Above-mentioned power supply chip management method substantially increases power supply chip efficiency under different loads, and power supply chip stabilised efficiency is not influenceed by load current, can effectively ensure that oled panel display effect.The present invention also provides corresponding power supply chip management system.

Description

Power supply chip management system and method
Technical field
The present invention relates to OLED display panel technical field of power management, more particularly to a kind of power supply chip management system And method.
Background technology
The power supply chip of OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) display panel is used In electric power is provided for panel, power supply chip provides panel driving voltage (AVDD), screen body forward voltage (ELVDD) for display panel With screen body negative voltage (ELVSS), to ensure the normal display image of panel.
The ELVDD when different pictures are shown is different with the electric current of ELVSS for OLED display panel, causes in display different pictures When power supply chip load it is different, and then influence the efficiency of power supply chip.Typically, the load current of power supply chip be 0mA~ 300mA, when output load current is 0mA~50mA, power supply chip efficiency is in 70%~90%, load electricity for conventional power source chip Flow during for 50mA~100mA, power supply chip efficiency can reach 90%~95%, and after load current is more than 100mA, with load The increase of electric current, the efficiency reduction of power supply chip, power supply chip efficiency is only capable of reaching 85% or so.Therefore, traditional OLED shows The power supply chip efficiency of panel is generally relatively low, and power supply chip efficiency is influenceed greatly by load current, and power supply chip efficiency is unstable, Influence oled panel display effect.
The content of the invention
Based on this, it is necessary to for traditional OLED display panel power supply chip by load current influenceed greatly, efficiency it is unstable And the low problem of efficiency, there is provided a kind of power supply chip management system and method.
A kind of power supply chip management system, including：Microprocessor, pulse modulation module and power supply chip, microprocessor Input is connected with display panel, and the output end of microprocessor is connected with the input of pulse modulation module, pulse modulation module Output end be connected with the input of power supply chip, the output end of power supply chip is connected with display panel, and microprocessor includes：
Image processing module, for detecting image to be displayed, obtains the grey decision-making of each pixel of image to be displayed；
Data memory module, for storing voltage parameter look-up table, voltage parameter look-up table storage grey decision-making and voltage Corresponding relation；
Data processing module, for searching voltage parameter look-up table according to the grey decision-making of pixel, obtains each pixel Voltage, the voltage according to each pixel calculates screen body load voltage, and according to the screen body resistance of screen body load voltage and display panel It is anti-to calculate screen body load current value；And,
Output adjustment module, the output duty cycle for adjusting pulse modulation module according to screen body load current value, adjusts The output voltage of economize on electricity source chip.
Wherein in one embodiment, power supply chip includes forward voltage output module and negative voltage output module, its In,
Forward voltage output module includes first switch pipe and the first gate driver, and the input of the first gate driver is connected The output end of pulse modulation module, the output end of the first gate driver is connected with the input of first switch pipe, first switch pipe Output end connection display panel, to display panel export forward voltage；
Negative voltage module includes second switch pipe and the second gate driver；The input connection pulse of the second gate driver The output end of modulation module, the output end of the second gate driver is connected with the input of second switch pipe, second switch pipe it is defeated Go out end connection display panel, negative voltage is exported to display panel；
Microprocessor is by adjusting the output duty cycle of pulse modulation module, so as to adjust first switch pipe and second switch The switching frequency of pipe, the forward voltage exported with regulation power supply chip and negative voltage.
A kind of power supply chip management method, comprises the following steps：
Detection image to be displayed, obtains the grey decision-making of each pixel of image to be displayed；
Grey decision-making according to pixel searches voltage parameter look-up table, obtains the voltage of each pixel；Voltage parameter is searched Table stores the corresponding relation of grey decision-making and voltage；
Voltage according to each pixel calculates screen body load voltage, and according to screen body load voltage and the screen body of display panel Impedance computation screen body load current value；
The output voltage of the output duty cycle regulation power supply chip according to screen body load current value regulation pulse-modulated signal.
Wherein in one embodiment, multiple the presetting of voltage parameter look-up table storage ties up a grey decision-making, and each is preset and ties up The point corresponding voltage of grey decision-making, adjacent two default to tie up a grey decision-making and is respectively first and ties up a grey decision-making and second and tie up a GTG Value, first tie up a grey decision-making and second tie up be spaced between a grey decision-making it is some it is non-tie up a grey decision-making, first tie up a grey decision-making and Second ties up between a grey decision-making, and the corresponding voltage of each grey decision-making is linear with grey decision-making.
Wherein in one embodiment, positioned at first tie up a grey decision-making and second tie up between a grey decision-making non-tie up a GTG It is worth corresponding voltage to be calculated by below equation：
Wherein, A1A grey decision-making, A are tied up for first2A grey decision-making, A are tied up for secondiIt is to tie up a grey decision-making and positioned at first Two tie up between a grey decision-making non-tie up a grey decision-making, A1<Ai<A2；U1The corresponding voltage of a grey decision-making, U are tied up for first2Tie up for second The corresponding voltage of point grey decision-making.
Wherein in one embodiment, the above-mentioned output duty that pulse-modulated signal is adjusted according to screen body load current value Than regulation power supply chip output voltage the step of include：
Current parameters look-up table is searched according to screen body load current value, the corresponding impulse modulation of screen body load current value is obtained Signal output dutycycle；Current parameters look-up table storage screen body load current value is corresponding with pulse-modulated signal output duty cycle Relation；
The switching frequency of the switching tube according to pulse-modulated signal output duty cycle regulation power supply chip, with regulation power supply core The output voltage of piece.
Wherein in one embodiment, above-mentioned pulse-modulated signal output duty cycle is with the increase of screen body load current value Increase.
Wherein in one embodiment, above-mentioned screen body load current value is with predetermined threshold value subsection setup, same segment identifier The interior corresponding pulse-modulated signal output duty cycle of screen body load current value is identical.
Wherein in one embodiment, above-mentioned screen body load voltage is the average voltage of the voltage of each pixel.
Wherein in one embodiment, above-mentioned voltage includes forward voltage and negative voltage.
Above-mentioned power supply chip management system and method, image to be displayed is detected by microprocessor, obtains image to be displayed Each pixel grey decision-making, and corresponding with image to be displayed screen body load current value is calculated according to grey decision-making, according to load The output duty cycle of current value adjustment pulse modulation module is with the output voltage of regulation power supply chip.Above-mentioned power supply chip management system The output voltage of the output duty cycle regulation power supply chip that system and method pass through microprocessor real-time adjustment pulse modulation module, makes Power supply chip can be according to external loading real-time adjustment output voltage, so that power supply chip is maintained at optimal stable state, significantly Power supply chip efficiency under different loads is improve, power supply chip stabilised efficiency is not influenceed by load current, can effectively protected Card oled panel display effect.
Brief description of the drawings
Fig. 1 is the structural representation of power-supply management system in figure one embodiment；
Fig. 2 is the structural representation of microprocessor in one embodiment；
Fig. 3 is the electrical block diagram of power supply chip in one embodiment；
Fig. 4 is the flow chart of method for managing power supply in one embodiment.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not For limiting the present invention.
Refer to Fig. 1, a kind of power supply chip management system, including：Microprocessor 100, pulse modulation module 120 and power supply Chip 140, the input of microprocessor 100 is connected with display panel, the output end and pulse modulation module of microprocessor 100 120 input connection, the output end of pulse modulation module 120 is connected with the input of power supply chip 140, power supply chip 140 Output end be connected with display panel.
As shown in Fig. 2 microprocessor 100 includes：Image processing module 102, data memory module 104, data processing mould Block 106 and output adjustment module 108.Wherein, image processing module 102 is used to detect image to be displayed, acquisition image to be displayed Each pixel grey decision-making；Data memory module 104 is used to store voltage parameter look-up table, voltage parameter look-up table storage ash Rank is worth the corresponding relation with voltage；Data processing module 106 is used to search voltage parameter look-up table according to the grey decision-making of pixel, The voltage of each pixel is obtained, the voltage according to each pixel calculates screen body load voltage, and according to screen body load voltage and shows Show the screen body impedance computation screen body load current value of panel；Output adjustment module 108 is used for according to the load current value regulation of screen body The output duty cycle of pulse modulation module, the output voltage of regulation power supply chip.
As shown in figure 3, in one embodiment, power supply chip 140 includes forward voltage output module 141 and negative voltage Output module 142, forward voltage output module 141 includes the gate driver 145 of first switch pipe 143 and first, first driving The input of device 145 connects the output end of pulse modulation module 120, output end and the first switch pipe of the first gate driver 145 143 input connection, the output end connection display panel of first switch pipe 143, forward voltage is exported to display panel；Negative sense Voltage module 142 includes the gate driver 146 of second switch pipe 144 and second；The input connection pulse of the second gate driver 146 The output end of modulation module 120, the output end of the second gate driver 146 is connected with the input of second switch pipe 144, and second opens The output end connection display panel of pipe 144 is closed, negative voltage is exported to display panel；Microprocessor 100 is adjusted by adjusting pulse The output duty cycle of molding block 120, so that the switching frequency of first switch pipe 143 and second switch pipe 144 is adjusted, to adjust electricity The forward voltage and negative voltage of the output of source chip 140.
As shown in Figure 1, Figure 3, power supply chip 140 include forward voltage output module 141, negative voltage output module 142, Driving voltage output module 147.Driving voltage output module 147 is used to export constant panel driving voltage, and driving voltage is defeated Go out the input connection power input VINP of module 147, output end connection driving voltage output end VO2；Forward voltage is exported Module 141 and negative voltage output module 142 are connected in parallel with driving voltage output module 147.Forward voltage output module 141 The first gate driver 145 be connected with the output end of pulse modulation module 120 by the first input control end ELON1, first opens Close the output end connection forward voltage output end VO1 of pipe 143；Second gate driver 146 of negative voltage output module 142 passes through Second input control end ELON2 is connected with the output end of pulse modulation module 120, and the output end connection of second switch pipe 145 is helped Phase voltage output end VO2.Specifically, in the present embodiment, first switch pipe 143 and second switch pipe 145 are all opened using MOSFET Guan Guan.
In the present embodiment, pulse modulation module 120 is arranged on outside power supply chip 140, broadens pulse modulation module 120 Pulse regulation scope, the adjustable range of pulse modulation module 120 is big, makes the power supply chip can be in the range of broader external loading Optimal stable state is maintained at, and is conducive to reducing the volume of power supply chip.
Fig. 4 is referred to, a kind of power supply chip management method is comprised the following steps：
Step 402：Detection image to be displayed, obtains the grey decision-making of each pixel of image to be displayed.
Specifically, the viewing area of OLED display panel is can to show the picture that the pixel cell of different colours is formed by multiple Vegetarian refreshments battle array, wherein each pixel cell include red sub-pixel, green sub-pixels and blue subpixels.Pixel gray level value is represented Three kinds of pixel gray level values of color sub-pixels in pixel cell, are that three kinds of color sub-pixels grey decision-makings are entered with certain data mode Row combination, the size of pixel gray level Value Data and the resolution ratio of screen are that the size of pixel-matrix is relevant.In the present embodiment, image The two field picture that processing module detection will show, and picture decoding method is used, binarization method is such as used by graphics It is corresponding RGB GTGs parameter value, obtains the grey decision-making of all pixels point of image to be displayed.
Step 404：Grey decision-making according to pixel searches voltage parameter look-up table, obtains the voltage of each pixel；Voltage Parameter lookup step stores the corresponding relation of grey decision-making and voltage.
Specifically, the voltage of pixel includes forward voltage and negative voltage, in the present embodiment, voltage parameter is prestored Look-up table, voltage parameter look-up table stores each corresponding forward voltage of grey decision-making (0~255) and negative voltage, by looking into Voltage parameter look-up table is looked for obtain the forward voltage and negative voltage of each pixel.
Step 406：Voltage according to each pixel calculates screen body load voltage, and according to screen body load voltage and display surface The screen body impedance computation screen body load current value of plate.
Specifically, in one embodiment, to ensure the display efficiency of each pixel, screen body load voltage is each pixel The average voltage of the voltage of point.By after the forward voltage and negative voltage that step 404 gets each pixel, calculating institute There are the forward voltage average value and negative voltage average value of pixel, obtain screen body forward direction load voltage and screen body negative sense load electricity Pressure.Afterwards, according to screen body forward direction load voltage and the screen body impedance computation screen body positive load current value of display panel, according to screen The absolute value and screen body impedance computation screen body negative load current value of body negative sense load voltage.
Step 408：The output duty cycle regulation power supply chip of pulse-modulated signal is adjusted according to screen body load current value Output voltage.
Specifically, in the present embodiment, respectively according to positive load current value and the regulation impulse modulation of negative load current value The output duty cycle of signal, the forward voltage exported with regulation power supply chip and negative voltage.Microprocessor is loaded according to forward direction Current value obtains the pulse-modulated signal output duty cycle of output to forward voltage output module, is obtained according to negative load current value Take the pulse-modulated signal output duty cycle of output valve negative voltage output module, and the output duty cycle that will be got send to Pulse modulation module, pulse modulation module exports corresponding pulse-modulated signal to positive electricity according to the output duty cycle for receiving Pressure output module and negative voltage output module, the forward voltage and negative voltage of the output of regulation power supply chip.
In one embodiment, multiple the presetting of voltage parameter look-up table storage ties up a grey decision-making, and each is preset and ties up an ash Rank is worth corresponding voltage, and adjacent two default to tie up a grey decision-making and be respectively first and tie up a grey decision-making and second and tie up a grey decision-making, First tie up a grey decision-making and second tie up be spaced between a grey decision-making it is some it is non-tie up a grey decision-making, tie up a grey decision-making and second first Tie up between a grey decision-making, the corresponding voltage of each grey decision-making is linear with grey decision-making.
Further, in one embodiment, positioned at first tie up a grey decision-making and second tie up between a grey decision-making non-tie up The corresponding voltage of point grey decision-making is calculated by below equation：
Wherein, A1A grey decision-making, A are tied up for first2A grey decision-making, A are tied up for secondiIt is to tie up a grey decision-making and positioned at first Two tie up between a grey decision-making non-tie up a grey decision-making, A1<Ai<A2；U1The corresponding voltage of a grey decision-making, U are tied up for first2Tie up for second The corresponding voltage of point grey decision-making.
Specifically, the data memory module storage voltage parameter look-up table of microprocessor, voltage parameter look-up table storage ash The corresponding relation of rank value-voltage parameter, and voltage parameter look-up table stores the corresponding relation of the grey decision-making and voltage.Grey decision-making Including 0~255 totally 256 values, if the whole grey decision-makings of storage need to take larger memory space with the corresponding relation of voltage. In the present embodiment, memory space is taken to reduce data storage, storage is default to tie up a little corresponding voltage parameter, presets for two and ties up a little The non-corresponding voltage of a grey decision-making of tying up between grey decision-making is linear with grey decision-making, i.e., tie up a grey decision-making and second first Tie up between a grey decision-making, the corresponding sinusoidal voltage of each grey decision-making increases grey decision-making and increase, the corresponding negative sense of each grey decision-making is electric Pressure increases and reduces with grey decision-making.
Specifically, positioned at two non-corresponding voltages of a grey decision-making of tying up tied up between a grey decision-making by above formula (1) It is calculated.For example, in one embodiment, as shown in following table one, voltage parameter look-up table storage 25 is default to tie up an ash Rank is worth the corresponding relation with voltage, greatly reduces memory data output, effectively save memory space.If the grey decision-making of pixel is It is non-to tie up a grey decision-making, then first judge when the corresponding voltage of grey decision-making of the pixel is searched this it is non-tie up a grey decision-making positioned at that two It is individual to tie up between a grey decision-making, the non-interval for tying up a grey decision-making is obtained, determine basis after the non-interval for tying up a grey decision-making Formula (1) calculates the corresponding voltage parameter of the grey decision-making, obtains the voltage of the pixel.Such as, in one embodiment, picture is obtained The grey decision-making of vegetarian refreshments is 9, and the grey decision-making ties up a grey decision-making for non-, by judging to obtain the grey decision-making positioned at grey decision-making 7 and GTG Between value 11, i.e., adjacent thereto first to tie up a grey decision-making be 7, and second to tie up a grey decision-making be 11, is calculated by above formula (1) Grey decision-making is that the forward voltage of 9 pixel is 2.985V, and negative voltage is -2.525V.
The voltage parameter look-up table of table one
In one embodiment, step 408 is comprised the following steps：Current parameters are searched according to screen body load current value to search Table, obtains the corresponding pulse-modulated signal output duty cycle of screen body load current value, the storage screen body load of current parameters look-up table The corresponding relation of current value and pulse-modulated signal output duty cycle；According to pulse-modulated signal output duty cycle regulation power supply core The switching frequency of the switching tube of piece, with the output voltage of regulation power supply chip.
Specifically, in the present embodiment, the current parameters look-up table prestored by lookup is obtained pulse-modulated signal and accounted for Sky ratio, stores the corresponding pulse-modulated signal output of screen body load current value in the range of 0~300mA in current parameters look-up table Dutycycle.In one embodiment, pulse-modulated signal output duty cycle increases with the increase of screen body load current value, accordingly , the switching frequency of first switch pipe and second switch pipe increases and increases with dutycycle, increases with first switch pipe switching frequency Greatly, the forward voltage increase of forward voltage output module output；Switching frequency with second switch pipe increases, negative voltage output The negative voltage of module output reduces.
In one embodiment, screen body load current value is with predetermined threshold value subsection setup, the screen body in same piecewise interval The corresponding pulse-modulated signal output duty cycle of load current value is identical.
Microprocessor adjusts first switch pipe and second switch pipe by adjusting the output duty cycle of pulse modulation module Switching frequency, makes power supply chip be operated in high efficiency region, in the present embodiment, by load current with predetermined threshold value subsection setup, The corresponding output duty cycle of current value in each current value piecewise interval is identical, by corresponding defeated of every section of Segmented electrical flow valuve Go out dutycycle to be stored in different registers, microprocessor controls pulse modulation module to export in different current value piecewise intervals The waveform of different duty.
Specifically, load current value segmented current is not fixed, it is segmented according to maximum current, predetermined threshold value is smaller to divide Section is thinner, and precision is higher, but corresponding shared register is more, and EMS memory occupation is bigger.Further, in one embodiment In, above-mentioned predetermined threshold value is 10mA~100mA.
Preferably, be and meanwhile take into account ensure power supply chip output accuracy and reduce EMS memory occupation, in one embodiment, Setting predetermined threshold value is 50mA.As shown in following table two, in the present embodiment, load current value is one according to every 50mA and is segmented Interval is divided into six different current segmentings, when load current value is in the range of 0~50mA, regulation pulse-modulated signal output Dutycycle is 20%；When load current value is in the range of 51~100mA, regulation pulse-modulated signal output duty cycle is 30%；When load current value is in the range of 101~150mA, regulation pulse-modulated signal output duty cycle is 40%；Work as load When current value is in the range of 151~200mA, regulation pulse-modulated signal output duty cycle is 50%；When load current value is 201 When in the range of~250mA, regulation pulse-modulated signal output duty cycle is 60%；When load current value is in 251~300mA scopes When interior, regulation pulse-modulated signal output duty cycle is 70%；Pulse-modulated signal output duty cycle increases with load current value And be incremented by.
The current parameters look-up table of table two
Register Load current (mA) Dutycycle
0x01 0~50 20%
0x02 51~100 30%
0x03 101~150 40%
0x04 151~200 50%
0x05 201~250 60%
0x06 251~300 70%
It should be noted that being on the corresponding output duty cycle of every section of load current value piecewise interval in the present embodiment One embodiment, in practical application, the corresponding output duty cycle of display panel of different type and model can difference, specifically The corresponding output duty cycle of load current value piecewise interval is configured according to actual needs, and the present embodiment does not do specific limit It is fixed.
In the present embodiment, by load current value subsection setup, the screen body load current value in same piecewise interval is corresponding Pulse-modulated signal output duty cycle is identical, even if load current increase can also keep power supply chip to export stabilization, is effectively ensured The delivery efficiency of power supply chip, the delivery efficiency of power supply chip can be always held at more than 90%.Meanwhile, even if load electricity Stream reaches maximum load current 300mA even more than maximum load currents, also can be according to the segment identifier where maximum load current Between export corresponding dutycycle waveform, it is ensured that power supply chip stabilization export, can be prevented effectively from conventional power source chip when screen body it is bright Height is spent, when electric current needed for load reaches maximum load current 300mA, power supply chip enters self-protection state, power supply chip Do not work, influence the problem of Display panel effect.
Above-mentioned power supply chip management system and method, image to be displayed is detected by microprocessor 100, obtains figure to be shown The grey decision-making of all pixels point of picture, and screen body load current value corresponding with image to be displayed is calculated according to grey decision-making, according to The output duty cycle of load current value regulation pulse modulation module 120 is with the output voltage of regulation power supply chip 140.Above-mentioned power supply The output duty cycle regulation power supply chip 140 that chip management system passes through the real-time adjustment pulse modulation module 120 of microprocessor 120 Output voltage, make the power supply chip 140 can be according to external loading real-time adjustment output voltage, so that power supply chip 140 is maintained at Optimal stable state, substantially increases the efficiency under different loads of power supply chip 140, the stabilised efficiency of power supply chip 140, no Influenceed by load current, can effectively ensure that oled panel display effect.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (10)

1. a kind of power supply chip management system, it is characterised in that including：Microprocessor, pulse modulation module and power supply chip, institute The input for stating microprocessor is connected with display panel, the input of the output end of the microprocessor and the pulse modulation module End connection, the output end of the pulse modulation module is connected with the input of the power supply chip, the output of the power supply chip End is connected with the display panel, and the microprocessor includes：
Image processing module, for detecting image to be displayed, obtains the grey decision-making of each pixel of the image to be displayed；
Data memory module, for storing voltage parameter look-up table, the voltage parameter look-up table storage grey decision-making and voltage Corresponding relation；
Data processing module, for searching voltage parameter look-up table according to the grey decision-making of the pixel, obtains each pixel Voltage, the voltage according to each pixel calculates screen body load voltage, and according to the screen body load voltage and display panel Screen body impedance computation screen body load current value；And,
Output adjustment module, the output duty cycle for adjusting the pulse modulation module according to the screen body load current value, Adjust the output voltage of the power supply chip.
2. power supply chip management system according to claim 1, it is characterised in that the power supply chip includes forward voltage Output module and negative voltage output module, wherein,
The forward voltage output module includes first switch pipe and the first gate driver, the input of first gate driver Connect the output end of the pulse modulation module, the input of the output end of first gate driver and the first switch pipe Connection, the output end of the first switch pipe connects the display panel, and forward voltage is exported to the display panel；
The negative voltage module includes second switch pipe and the second gate driver；The input connection of second gate driver The output end of the pulse modulation module, the output end of second gate driver connects with the input of the second switch pipe Connect, the output end of the second switch pipe connects the display panel, and negative voltage is exported to the display panel；
The microprocessor by adjusting the output duty cycle of the pulse modulation module so that adjust the first switch pipe and The switching frequency of the second switch pipe, to adjust the forward voltage and the negative voltage that the power supply chip is exported.
3. a kind of power supply chip management method, it is characterised in that comprise the following steps：
Detection image to be displayed, obtains the grey decision-making of each pixel of the image to be displayed；
Grey decision-making according to the pixel searches voltage parameter look-up table, obtains the voltage of each pixel；The voltage parameter Look-up table stores the corresponding relation of grey decision-making and voltage；
Voltage according to each pixel calculates screen body load voltage, and according to the screen body load voltage and display panel Screen body impedance computation screen body load current value；
The output voltage of the output duty cycle regulation power supply chip of pulse-modulated signal is adjusted according to the screen body load current value.
4. power supply chip management method according to claim 3, it is characterised in that the voltage parameter look-up table storage is more Individual presetting ties up a grey decision-making, and each is preset and ties up the corresponding voltage of a grey decision-making, and two adjacent described presetting tie up a grey decision-making Respectively first ties up a grey decision-making and second ties up a grey decision-making, described first tie up a grey decision-making and described second tie up a grey decision-making it Between be spaced it is some it is non-tie up a grey decision-making, between described first ties up a grey decision-making and described second ties up a grey decision-making, each grey decision-making Corresponding voltage is linear with grey decision-making.
5. power supply chip management method according to claim 4, it is characterised in that positioned at described first tie up a grey decision-making and The second non-corresponding voltage of a grey decision-making of tying up tied up between a grey decision-making is calculated by below equation：
U i = U 1 + U 2 - U 1 A 2 - A 1 &times; ( A i - A 1 ) ;
Wherein, A1A grey decision-making, A are tied up for first2A grey decision-making, A are tied up for secondiIt is to tie up a grey decision-making and second positioned at first to tie up Non- a grey decision-making, A are tied up between point grey decision-making1<Ai<A2；U1The corresponding voltage of a grey decision-making, U are tied up for first2An ash is tied up for second Rank is worth corresponding voltage.
6. power supply chip management method according to claim 3, it is characterised in that described according to the screen body load current The step of output voltage of the output duty cycle regulation power supply chip of value regulation pulse-modulated signal, includes：
Current parameters look-up table is searched according to the screen body load current value, the corresponding pulse of the screen body load current value is obtained Modulated signal output duty cycle；The current parameters look-up table stores the screen body load current value and is exported with pulse-modulated signal The corresponding relation of dutycycle；
The switching frequency of the switching tube of the power supply chip is adjusted according to the pulse-modulated signal output duty cycle, to adjust State the output voltage of power supply chip.
7. power supply chip management method according to claim 6, it is characterised in that the pulse-modulated signal exports duty Increase than increasing with the screen body load current value.
8. power supply chip management method according to claim 6, it is characterised in that the screen body load current value is with default Threshold segmentation is set, and the corresponding pulse-modulated signal output duty cycle of screen body load current value in same piecewise interval is identical.
9. the power supply chip management method according to any one of claim 3 to 8, the screen body load voltage is each picture The average voltage of the voltage of vegetarian refreshments.
10. power supply chip management method according to claim 9, it is characterised in that the voltage include forward voltage and Negative voltage.
CN201611228634.8A 2016-12-27 2016-12-27 Power supply chip management system and method Active CN106782314B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611228634.8A CN106782314B (en) 2016-12-27 2016-12-27 Power supply chip management system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611228634.8A CN106782314B (en) 2016-12-27 2016-12-27 Power supply chip management system and method

Publications (2)

Publication Number Publication Date
CN106782314A true CN106782314A (en) 2017-05-31
CN106782314B CN106782314B (en) 2019-01-15

Family

ID=58921924

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611228634.8A Active CN106782314B (en) 2016-12-27 2016-12-27 Power supply chip management system and method

Country Status (1)

Country Link
CN (1) CN106782314B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107731165A (en) * 2017-11-27 2018-02-23 合肥鑫晟光电科技有限公司 A kind of current control method and its device
CN108665849A (en) * 2018-05-03 2018-10-16 武汉精测电子集团股份有限公司 A kind of method and device adjusted based on multigroup gamma and power supply dynamic adjusts
CN109740519A (en) * 2018-12-29 2019-05-10 联想(北京)有限公司 Control method and electronic equipment
CN111341268A (en) * 2020-04-13 2020-06-26 京东方科技集团股份有限公司 Display driving circuit, display driving method and device
CN112967683A (en) * 2021-02-09 2021-06-15 上海天马有机发光显示技术有限公司 Power supply control method, power supply control chip, display panel and display device
WO2023092453A1 (en) * 2021-11-26 2023-06-01 京东方科技集团股份有限公司 Driving circuit and driving method for display panel, and display apparatus
WO2024016489A1 (en) * 2022-07-21 2024-01-25 硅谷数模(苏州)半导体股份有限公司 Method for adjusting output electrical signal of power management chip and screen driver board

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060087247A1 (en) * 2004-10-22 2006-04-27 Advatech Global Ltd. System and method for compensation of active element variations in an active-matrix organic light-emitting diode (OLED) flat-panel display
US20110025676A1 (en) * 2009-07-30 2011-02-03 Samsung Mobile Display Co., Ltd. Organic light emitting display device and driving voltage setting method thereof
CN102542990A (en) * 2011-11-23 2012-07-04 友达光电股份有限公司 Display and method for generating power output thereof
CN104036721A (en) * 2014-05-15 2014-09-10 京东方科技集团股份有限公司 Organic-light-emitting-diode display panel, and driving method and display device thereof
CN105976756A (en) * 2016-07-22 2016-09-28 京东方科技集团股份有限公司 Power supply chip and display device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060087247A1 (en) * 2004-10-22 2006-04-27 Advatech Global Ltd. System and method for compensation of active element variations in an active-matrix organic light-emitting diode (OLED) flat-panel display
US20110025676A1 (en) * 2009-07-30 2011-02-03 Samsung Mobile Display Co., Ltd. Organic light emitting display device and driving voltage setting method thereof
CN102542990A (en) * 2011-11-23 2012-07-04 友达光电股份有限公司 Display and method for generating power output thereof
CN104036721A (en) * 2014-05-15 2014-09-10 京东方科技集团股份有限公司 Organic-light-emitting-diode display panel, and driving method and display device thereof
CN105976756A (en) * 2016-07-22 2016-09-28 京东方科技集团股份有限公司 Power supply chip and display device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107731165A (en) * 2017-11-27 2018-02-23 合肥鑫晟光电科技有限公司 A kind of current control method and its device
CN107731165B (en) * 2017-11-27 2019-07-26 合肥鑫晟光电科技有限公司 A kind of current control method and its device
CN108665849A (en) * 2018-05-03 2018-10-16 武汉精测电子集团股份有限公司 A kind of method and device adjusted based on multigroup gamma and power supply dynamic adjusts
CN108665849B (en) * 2018-05-03 2020-04-10 武汉精测电子集团股份有限公司 Method and device based on multi-group gamma regulation and dynamic power supply regulation
CN109740519A (en) * 2018-12-29 2019-05-10 联想(北京)有限公司 Control method and electronic equipment
CN111341268A (en) * 2020-04-13 2020-06-26 京东方科技集团股份有限公司 Display driving circuit, display driving method and device
CN112967683A (en) * 2021-02-09 2021-06-15 上海天马有机发光显示技术有限公司 Power supply control method, power supply control chip, display panel and display device
WO2023092453A1 (en) * 2021-11-26 2023-06-01 京东方科技集团股份有限公司 Driving circuit and driving method for display panel, and display apparatus
WO2024016489A1 (en) * 2022-07-21 2024-01-25 硅谷数模(苏州)半导体股份有限公司 Method for adjusting output electrical signal of power management chip and screen driver board

Also Published As

Publication number Publication date
CN106782314B (en) 2019-01-15

Similar Documents

Publication Publication Date Title
CN106782314A (en) Power supply chip management system and method
CN103996374B (en) External dynamic compensates the device and method of display screen active area direct current pressure drop
CN104464626B (en) Organic electroluminescence display device and method of manufacturing same and method
US9368060B2 (en) Organic light emitting display device using an adjustable power source voltage and driving method thereof
CN107068048B (en) The digital driving method of OLED display
CN107799069B (en) Pixel compensation system, drive system and method, time-sequence control module, device
US8896641B2 (en) Organic light emitting diode display device and method of driving the same
CN105336292B (en) Oled pixel compensation circuit and oled pixel driving method
KR101894768B1 (en) An active matrix display and a driving method therof
US20170169767A1 (en) Organic electroluminescent display panel, display apparatus and luminance compensation method
CN103854599B (en) For the method and apparatus controlling organic light-emitting diode (OLED) display apparatus electric current
US8791953B2 (en) Value adjustment methods, value adjustment signal processing apparatus, and image display systems using the same
CN107767815A (en) The compensation system and method for OLED display panel
EP2985753A2 (en) Flat display device
US20170186357A1 (en) Drive system of amoled display and drive method
CN108831381A (en) Show data alignment system and display data adjustment method
CN107516484A (en) AMOLED external electricals compensate method for detecting
KR102320306B1 (en) The organic light emitting display device and a driving method
CN105976756A (en) Power supply chip and display device
CN105185351B (en) Lift the method and system of OLED display panel contrast
CN108538253B (en) The pixel driver system and driving method of displayer
CN110111736B (en) Display device driving method and display device driving system
US20160119995A1 (en) Signal smoothing device and backlight device including the same
US20110084953A1 (en) Organic light emitting display having a power saving mechanism
KR20220089808A (en) Display device and driving method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant