CN108597447A - A kind of adjustment method and device of display panel gray scale voltage - Google Patents
A kind of adjustment method and device of display panel gray scale voltage Download PDFInfo
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- CN108597447A CN108597447A CN201810742079.3A CN201810742079A CN108597447A CN 108597447 A CN108597447 A CN 108597447A CN 201810742079 A CN201810742079 A CN 201810742079A CN 108597447 A CN108597447 A CN 108597447A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
Abstract
The present invention provides a kind of adjustment method and device of display panel gray scale voltage, which includes：Gamma register ties up a voltage-regulating circuit, grayscale bleeder circuit and resistance built-up circuit；It includes n series resistance to tie up a voltage-regulating circuit, grayscale bleeder circuit includes m series resistance, the input terminal for tying up first resistance in a voltage-regulating circuit is tied up as first and a little ties up the output end of last resistor in a voltage-regulating circuit and tied up a little as (n+1)th；Gamma register adjusts first voltage tied up a little and (n+1)th voltage tied up a little so that first voltage tied up a little matches with maximum gray voltage, and (n+1)th voltage tied up a little matches with minimum gray voltage；Gamma register, which also controls resistance built-up circuit, ties up the output ends of a little resistance different from grayscale bleeder circuit by i-th and is sequentially connected respectively.The present invention can simplify gamma circuit, reduce the quantity of resistance in gamma circuit, reduce the cost of manufacture of gamma circuit.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of adjustment methods and device of display panel gray scale voltage.
Background technology
AMOLED (Active-matrix organic light emitting diode, active matrix organic light-emitting two
Polar body) it is a kind of display technology applied in TV and mobile device, compare present mainstream liquid crystal display, OLED
(organic light emitting diode, organic light emitting diode) has high contrast, wide viewing angle, low-power consumption, volume
The advantages that thinner, is expected to become next-generation flat panel display, is one of technology of greatest concern in current flat panel display.
According to human eye to bright induction degree, it usually needs carry out GAMMA adjustment (gamma adjustment) to display equipment and come
Improve display effect.
Conventional OLED drive is as shown in Figure 1, T1, T2 are thin film transistor (TFT), and Cst is storage capacitance, and SCAN is
Scanning signal, OVDD are supply voltage, and OVSS is power ground end, and the size of voltage data signal Vd can control OLED and shine
Brightness.Therefore, driving chip needs to provide accurate voltage data signal Vd, to ensure the normal display of display panel.One
As voltage data signal Vd by driving chip GAMMA circuits (gamma circuit) generate, universal GAMMA circuits such as Fig. 2
Shown, GVDD is supply voltage, and GVSS is power ground end.The GAMMA circuits are composed in series by multiple divider resistances, and resistance is got over
More, partial pressure precision is higher, and resistance string is made of 2048 resistance in this example.When using the GAMMA circuits, several tie up a little is chosen
(Band Point：BP refers to fixed several grayscale, first adjusts and ties up the corresponding voltage of a grayscale, the gray scale voltage of intermediate region
Can be obtained by tying up a gray scale voltage interpolation), and found on divider resistance and suitably tie up a gray scale voltage；Here, suitably
Tying up a gray scale voltage refers to, when this being tied up a gray scale voltage being delivered to display panel as data voltage, the brightness of display panel
Meet the brightness requirement for tying up a grayscale.
Invention content
In order to solve the above technical problems, the present invention provides a kind of adjustment method and device of display panel gray scale voltage, it can
To simplify gamma circuit, the quantity of resistance in gamma circuit is reduced, the cost of manufacture of gamma circuit is reduced.
A kind of adjustment method of display panel gray scale voltage provided by the invention is applied in gamma circuit, the gamma
Circuit includes to tie up a voltage-regulating circuit and grayscale bleeder circuit；Wherein, a voltage-regulating circuit of tying up includes n string
Join resistance, the grayscale bleeder circuit includes m series resistance, described to tie up in a voltage-regulating circuit the defeated of first resistance
Entering end to tie up a little as first, the output end for tying up last resistor in a voltage-regulating circuit is tied up a little as (n+1)th,
And the output end for tying up each resistance in a voltage-regulating circuit is tied up a little as one；
The adjustment method of the display panel gray scale voltage, includes the following steps：
S1, first voltage tied up a little and (n+1)th voltage tied up a little are adjusted so that described first is tied up a little
Voltage match with maximum gray voltage, and (n+1)th voltage tied up a little matches with minimum gray voltage, and by institute
It states first and ties up the input terminal for being a little connected to first resistance in the grayscale bleeder circuit, a connection is tied up by described (n+1)th
To the output end of first resistance in the grayscale bleeder circuit；
It is tied up described in S2, adjusting in voltage-regulating circuit and to tie up a little and in addition to (n+1)th is tied up a little other except first and tie up a little pair
The gray scale voltage answered；Wherein, adjust tie up a little corresponding gray scale voltage described i-th when, 1<i<N, will tie up for described i-th a little with
The output end of different resistance is sequentially connected respectively in the grayscale bleeder circuit, is tied up at described i-th and is a little divided with the grayscale
J-th of resistance in circuit output end connection when, using the output end voltage of j-th of resistance in the grayscale bleeder circuit as
Data voltage is delivered to display panel, and detects the brightness of display panel, when the brightness of display panel meets the grayscale partial pressure
In circuit when the corresponding target gray scale brightness of the output end of j-th of resistance, then by j-th of resistance in the grayscale bleeder circuit
The gray scale voltage that output end voltage is tied up a little as i-th.
Preferably, the resistance value all same for tying up n resistance in a voltage-regulating circuit, and in the grayscale bleeder circuit
The resistance value all same of m resistance.
Preferably, the maximum gray voltage is 255 gray scale voltages, and the minimum gray voltage is 0 gray scale voltage；It is described
The output end voltage of each resistance corresponds to a gray scale voltage in grayscale bleeder circuit.
Preferably, in step S2, will tie up for described i-th a little from the output end minute of different resistance in the grayscale bleeder circuit
It is not sequentially connected, specially：
As i=2, since first resistance in the grayscale bleeder circuit, successively by the grayscale bleeder circuit
The output end of middle difference resistance is tied up with described 2nd connect, and a little corresponding gray scale voltage is tied up for the 2nd up to determination；
Work as i>It, successively will be in the grayscale bleeder circuit since k-th of resistance in the grayscale bleeder circuit when 2
The output end of different resistance is connect with tying up for described i-th, wherein the output end voltage of -1 resistance of kth corresponds to described (i-1)-th
A gray scale voltage tied up a little.
Preferably, the quantity for tying up resistance in a voltage regulator resistor is no more than 20.
Preferably, in the grayscale bleeder circuit the corresponding target gray scale brightness of output end of j-th of resistance according to maximum
The corresponding grayscale of output end of j-th of resistance in grayscale, maximum gray brightness and the grayscale bleeder circuit, and combine and set
Fixed gamma curve is calculated.
The present invention also provides a kind of debugging apparatus of display panel gray scale voltage, including：Gamma register ties up a voltage tune
Whole circuit, grayscale bleeder circuit and resistance built-up circuit；Wherein, a voltage-regulating circuit of tying up includes n series electrical
Resistance, the grayscale bleeder circuit includes m series resistance, the input terminal for tying up first resistance in a voltage-regulating circuit
It is tied up a little as first, the output end for tying up last resistor in a voltage-regulating circuit is tied up a little as (n+1)th, and institute
It states and ties up the output end of each resistance in a voltage-regulating circuit and tied up a little as one；
The gamma register makes for adjusting first voltage tied up a little and (n+1)th voltage tied up a little
It obtains first voltage tied up a little with maximum gray voltage to match, and (n+1)th voltage tied up a little and minimum gray
Voltage matches；
And the gamma register is additionally operable to output control signals to the resistance built-up circuit, is turned with controlling the resistance
It connects circuit and ties up described first the input terminal for being a little connected to first resistance in the grayscale bleeder circuit, by described (n+1)th
It is a to tie up the output end for being a little connected to first resistance in the grayscale bleeder circuit, and will tie up for i-th a little with the grayscale minute
The output end of different resistance is sequentially connected respectively in volt circuit, when i-th is tied up a little with j-th in the grayscale bleeder circuit
When the output end connection of resistance, conveyed the output end voltage of j-th of resistance in the grayscale bleeder circuit as data voltage
To display panel, when the brightness of display panel meets the corresponding target of output end of j-th of resistance in the grayscale bleeder circuit
When gray-scale intensity, then the grayscale tied up j-th of resistance output end voltage in the grayscale bleeder circuit a little as i-th is electric
Pressure；Wherein, 1<i<N, 0<j<m.
Preferably, the resistance value all same for tying up n resistance in a voltage-regulating circuit, and in the grayscale bleeder circuit
The resistance value all same of m resistance.
Preferably, the maximum gray voltage is 255 gray scale voltages, and the minimum gray voltage is 0 gray scale voltage；It is described
The output end voltage of each resistance corresponds to a gray scale voltage in grayscale bleeder circuit.
Preferably, the quantity for tying up resistance in a voltage regulator resistor is no more than 20.
Implement the present invention, has the advantages that：The gray scale voltage adjustment method of display panel provided by the invention and
In device, the gamma circuit of use includes to tie up a voltage-regulating circuit and grayscale bleeder circuit, is tied up in a voltage-regulating circuit
Including resistance quantity be no more than and tie up quantity a little, the quantity of resistance is no more than grayscale total quantity, this hair in grayscale bleeder circuit
In bright middle gamma circuit resistance total quantity with respect to the background art in gamma circuit resistance total quantity for, can subtract significantly
It is few, therefore the present invention can reduce the quantity of resistance in gamma circuit, simplify gamma circuit and reduce the making of gamma circuit
Cost.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the drive circuit schematic diagram of OLED in AMOLED display panels in background technology.
Fig. 2 is the schematic diagram of gamma circuit in background technology.
Fig. 3 is the schematic diagram of gamma circuit provided by the invention.
Fig. 4 is the flow chart of the adjustment method of display panel gray scale voltage provided by the invention.
Fig. 5 is the functional block diagram of the debugging apparatus of display panel gray scale voltage provided by the invention.
Specific implementation mode
The present invention provides a kind of adjustment method of display panel gray scale voltage, which is applied to gal shown in Fig. 3
In horse circuit, gamma circuit includes to tie up a voltage-regulating circuit 1 and grayscale bleeder circuit 2；Wherein, a voltage-regulating circuit is tied up
1 includes n series resistance R, and grayscale bleeder circuit 2 includes m series resistance R ', is tied up first in a voltage-regulating circuit 1
The input terminal of a resistance ties up point BP1 as first, ties up the output end of last resistor in a voltage-regulating circuit 1 as
N+1 are tied up point BPn+1, and the output end for tying up each resistance in a voltage-regulating circuit 1 is tied up a little as one.In general,
The quantity for tying up resistance in a voltage regulator resistor is no more than 20.
Wherein, the input terminal voltage of first resistance in grayscale bleeder circuit 2 corresponds to the voltage of maximum gray, grayscale point
The output end of last resistor in volt circuit 2 corresponds to the voltage of minimum gray, each resistance in grayscale bleeder circuit 2
Output end voltage corresponds to the voltage of a grayscale.
With reference to figure 4, the adjustment method of the display panel gray scale voltage in the present invention includes the following steps：
S1, first voltage for tying up point BP1 and (n+1)th voltage for tying up point BPn+1 are adjusted so that first is tied up point BP1
Voltage match with maximum gray voltage, and (n+1)th voltage for tying up point BPn+1 matches with minimum gray voltage, namely
It is the brightness by adjusting display panel so that display panel reaches maximum brightness and minimum brightness, obtains maximum gray voltage
With minimum gray voltage, and then it can also determine and each tie up voltage；And it ties up point BP1 by first and is connected to grayscale bleeder circuit
The input terminal of first resistance in 2 ties up the output that point BPn+1 is connected to first resistance in grayscale bleeder circuit 2 by (n+1)th
End；
S2, adjusting tie up in a voltage-regulating circuit 1 that other are tied up in addition to first is tied up point BP1 and (n+1)th is tied up point BPn+1
The corresponding gray scale voltage of point；Wherein, adjust tie up the corresponding gray scale voltages of point BPi for i-th when, 1<i<N ties up point BPi by i-th
The output end of resistance different from grayscale bleeder circuit 2 is sequentially connected respectively, is tied up at i-th in point BPi and grayscale bleeder circuit 2
J-th of resistance output end (that is to say+1 grayscale point of corresponding jth) connection when, by j-th of resistance in grayscale bleeder circuit 2
Output end voltage be delivered to display panel as data voltage, and the brightness of display panel is detected, when the brightness of display panel
It, then will be in grayscale bleeder circuit 2 when meeting the corresponding target gray scale brightness of output end of j-th of resistance in grayscale bleeder circuit 2
J-th of resistance output end voltage gray scale voltage for tying up point BPi as i-th.It is obtaining each tying up a little corresponding gray scale voltage
Later, interpolation method can be utilized, the corresponding gray scale voltage of each grayscale is obtained.
Here, it is to divide equally the input terminal of the output end of each resistance and first resistance in grayscale bleeder circuit 2
Not Zuo Wei a grayscale point, for example, the input terminal of first resistance in grayscale bleeder circuit 2 is as first grayscale point, m
The output end of a resistance is as the m+1 grayscale point.First grayscale point corresponds to 255 grayscale, and second grayscale point corresponds to 254 ashes
Rank, and so on, the m+1 grayscale point corresponds to 0 grayscale.
With reference to figure 3, maximum gray voltage is 255 gray scale voltage Vg255, and minimum gray voltage is 0 gray scale voltage Vg0.
It is that the input terminal voltage of first resistance corresponds to 255 gray scale voltages, and the output end voltage of first resistance corresponds to 254 grayscale
The output end voltage of voltage, the 2nd resistance corresponds to 253 gray scale voltages, and the output end voltage of j-th of resistance corresponds to 255-j grayscale
The output end voltage of voltage, m-th of resistance corresponds to 0 gray scale voltage.
The above-mentioned resistance value all same for tying up n resistance in a voltage-regulating circuit 1, and m resistance in grayscale bleeder circuit 2
Resistance value all same.
So, each voltage of tying up can be determined by partial pressure theorem, and the voltage of tying up for tying up point BPi i-th is：
In formula, BP1For first tie up point BP1 tie up voltage, namely be the largest and tie up voltage, BPn+1 is minimum
Tie up voltage, BPi be tie up point BPi for i-th tie up voltage.
Further, in step S2, the output end for tying up point BPi resistance different from grayscale bleeder circuit 2 by i-th is distinguished
It is sequentially connected, specially：
It, successively will be different in grayscale bleeder circuit 2 since first resistance in grayscale bleeder circuit 2 as i=2
The output end of resistance is tied up with the 2nd and is connect, until determining the 2nd ties up a little corresponding gray scale voltage；
Work as i>When 2, since k-th of resistance in grayscale bleeder circuit 2, successively by different electricity in grayscale bleeder circuit 2
The output end of resistance is tied up point BPi with i-th and is connect, wherein the output end voltage of -1 resistance of kth corresponds to (i-1)-th ash tied up a little
Rank voltage.
A little corresponding gray scale voltage is tied up in debugging successively, is first debugged since first is tied up point BP1, first is tied up point BP1 tune
Examination is completed and then a little corresponding gray scale voltage is tied up in debugging second, until completing penultimate ties up gray scale voltage a little
Debugging.
Specifically, the 2nd gray scale voltage tied up a little is first debugged, first ties up the 2nd a little and the 2nd in grayscale bleeder circuit 2
Grayscale point (output end that is to say first resistance) connects, using the voltage of the 2nd grayscale point in grayscale bleeder circuit 2 as number
It is delivered to display panel according to voltage, controls the display panel brightness that is luminous, and detecting display panel.The 2nd in grayscale bleeder circuit 2
A grayscale point corresponds to 254 grayscale, then will grayscale bleeder circuit 2 at this time when the brightness of display panel meets the brightness of 254 grayscale
In the 2nd grayscale point voltage, that is to say the gray scale voltage that 254 gray scale voltages are tied up a little as the 2nd.If display panel
Brightness does not meet 254 gray-scale intensities, continues to allow the 2nd to tie up a little and the 3rd grayscale point (that is to say the 2nd in grayscale bleeder circuit 2
The output end of a resistance) connection, the voltage of the 3rd grayscale point in grayscale bleeder circuit 2 is delivered to display as data voltage
Panel, if the brightness of display panel meets the brightness of 253 grayscale, by the electricity of the 3rd grayscale point in grayscale bleeder circuit 2
Pressure, that is to say that 253 gray scale voltages tie up a little corresponding gray scale voltage as the 2nd.
If it is 253 gray scale voltages to tie up a little corresponding gray scale voltage by the 2nd, then debugging the 3rd grayscale tied up a little
When voltage, first the 3rd is tied up and is a little connected with the 4th grayscale point (output end that is to say the 3rd resistance) in grayscale bleeder circuit 2
It connects, when the voltage of the 4th grayscale point in grayscale bleeder circuit 2 is delivered to display panel as data voltage, display panel
Brightness does not meet the brightness of 252 grayscale, then is tied up the 3rd and a little (that is to say the 4th with the 5th grayscale point in grayscale bleeder circuit 2
The output end of resistance) connection, until determining the 3rd gray scale voltage tied up a little.
By the above-mentioned means, determining that each ties up a little corresponding gray scale voltage.
Further, the corresponding target gray scale brightness of the output end of j-th of resistance is grey according to maximum in grayscale bleeder circuit 2
The corresponding grayscale of output end of j-th of resistance in rank, maximum gray brightness and grayscale bleeder circuit 2, and combine the gal of setting
Horse curve is calculated.
For example, grayscale bleeder circuit 2 corresponds to 0~255 grayscale, the corresponding display panels of maximum gray Gx (i.e. 255 grayscale)
Brightness be LVmax, the object brightnesses of the corresponding display panels of grayscale Gx is LVx, passes through following gamma curve formula and calculates
LVx：
γ values in formula can sets itself according to demand, such as can be 2.2.
The debugging apparatus of above-mentioned display panel gray scale voltage, can be used in liquid crystal display panel or AMOLED is shown
In panel.
The present invention also provides a kind of debugging apparatus of display panel gray scale voltage, as shown in figure 5, the debugging apparatus includes：
Gamma register 3 ties up a voltage-regulating circuit 1, grayscale bleeder circuit 2 and resistance built-up circuit 4；Wherein, a voltage tune is tied up
Whole circuit 1 includes n series resistance R, and grayscale bleeder circuit 2 includes m series resistance R ', ties up a voltage-regulating circuit 1
In the input terminal of first resistance tie up point BP1 as first, tie up the output end of last resistor in a voltage-regulating circuit 1
Point BPn+1 is tied up as (n+1)th, and the output end for tying up each resistance in a voltage-regulating circuit 1 is tied up a little as one.One
As, the quantity for tying up resistance in a voltage regulator resistor is no more than 20.
Gamma register 3 is for adjusting the voltage and (n+1)th voltage for tying up point BPn+1 that first is tied up point BP1 so that the
One voltage for tying up point BP1 matches with maximum gray voltage, and (n+1)th voltage for tying up point BPn+1 and minimum gray voltage
Match.
And gamma register 3 is additionally operable to output control signals to resistance built-up circuit 4, it will to control resistance built-up circuit 4
First is tied up the input terminal that point BP1 is connected to first resistance in grayscale bleeder circuit 2, and tying up point BPn+1 by (n+1)th is connected to
The output end of first resistance in grayscale bleeder circuit 2, and tie up point BPi resistance different from grayscale bleeder circuit 2 by i-th
Output end be sequentially connected respectively, connect with the output end of j-th of resistance in grayscale bleeder circuit 2 when tying up i-th point BPi
When, the output end voltage of j-th of resistance in grayscale bleeder circuit 2 is delivered to display panel as data voltage, works as display surface
When the brightness of plate meets the output end corresponding target gray scale brightness of j-th of resistance in grayscale bleeder circuit 2, then grayscale is divided
The gray scale voltage that j-th of resistance output end voltage in circuit 2 ties up point BPi as i-th；Wherein, 1<i<N, 0<j<m.
Further, the resistance value all same of n resistance in a voltage-regulating circuit 1 is tied up, and m in grayscale bleeder circuit 2
The resistance value all same of resistance.
Further, maximum gray voltage is 255 gray scale voltages, and minimum gray voltage is 0 gray scale voltage；Grayscale partial pressure electricity
The output end voltage of each resistance corresponds to a gray scale voltage in road 2.
In conclusion in the gray scale voltage adjustment method and device of display panel provided by the invention, the gamma electricity of use
Road includes to tie up a voltage-regulating circuit 1 and grayscale bleeder circuit 2, ties up the resistance quantity for including in a voltage-regulating circuit 1 not
More than the quantity tied up a little, the quantity of resistance is no more than grayscale total quantity in grayscale bleeder circuit 2, electricity in gamma circuit in the present invention
In hindering total quantity with respect to the background art for the resistance total quantity of gamma circuit, it can greatly reduce, therefore the present invention can be with
The quantity of resistance in gamma circuit is reduced, gamma circuit is simplified and reduces the cost of manufacture of gamma circuit.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's
Protection domain.
Claims (10)
1. a kind of adjustment method of display panel gray scale voltage, which is characterized in that be applied in gamma circuit, the gamma circuit
Include to tie up a voltage-regulating circuit and grayscale bleeder circuit；Wherein, a voltage-regulating circuit of tying up includes n series electrical
Resistance, the grayscale bleeder circuit includes m series resistance, the input terminal for tying up first resistance in a voltage-regulating circuit
It is tied up a little as first, the output end for tying up last resistor in a voltage-regulating circuit is tied up a little as (n+1)th, and institute
It states and ties up the output end of each resistance in a voltage-regulating circuit and tied up a little as one；
The adjustment method of the display panel gray scale voltage, includes the following steps：
S1, first voltage tied up a little and (n+1)th voltage tied up a little are adjusted so that first electricity tied up a little
Pressure matches with maximum gray voltage, and (n+1)th voltage tied up a little matches with minimum gray voltage, and by described the
One is tied up the input terminal for being a little connected to first resistance in the grayscale bleeder circuit, and described (n+1)th is tied up and is a little connected to institute
State the output end of first resistance in grayscale bleeder circuit；
Tied up described in S2, adjusting in voltage-regulating circuit tied up except first a little and in addition to (n+1)th is tied up a little other tie up it is a little corresponding
Gray scale voltage；Wherein, adjust tie up a little corresponding gray scale voltage described i-th when, 1<i<N, will tie up for described i-th a little with it is described
The output end of different resistance is sequentially connected respectively in grayscale bleeder circuit, is tied up at described i-th a little and the grayscale bleeder circuit
In j-th of resistance output end connection when, using the output end voltage of j-th of resistance in the grayscale bleeder circuit as data
Voltage is delivered to display panel, and detects the brightness of display panel, when the brightness of display panel meets the grayscale bleeder circuit
In j-th of resistance output end corresponding target gray scale brightness when, then j-th of resistance in the grayscale bleeder circuit is exported
The gray scale voltage that terminal voltage is tied up a little as i-th.
2. the adjustment method of display panel gray scale voltage according to claim 1, which is characterized in that described to tie up a voltage tune
The resistance value all same of n resistance in whole circuit, and in the grayscale bleeder circuit m resistance resistance value all same.
3. the adjustment method of display panel gray scale voltage according to claim 2, which is characterized in that the maximum gray electricity
Pressure is 255 gray scale voltages, and the minimum gray voltage is 0 gray scale voltage；Each resistance is defeated in the grayscale bleeder circuit
Go out terminal voltage and corresponds to a gray scale voltage.
4. the adjustment method of display panel gray scale voltage according to claim 1, which is characterized in that in step S2, by institute
It states i-th and ties up and be a little sequentially connected respectively from the output end of different resistance in the grayscale bleeder circuit, specially：
It, successively will be different in the grayscale bleeder circuit since first resistance in the grayscale bleeder circuit as i=2
The output end of resistance is tied up with described 2nd and is connect, until determining the 2nd ties up a little corresponding gray scale voltage；
Work as i>It, successively will be different in the grayscale bleeder circuit since k-th of resistance in the grayscale bleeder circuit when 2
The output end of resistance is connect with tying up for described i-th, wherein the output end voltage of -1 resistance of kth corresponds to described (i-1)-th and ties up
The gray scale voltage of point.
5. the adjustment method of display panel gray scale voltage according to claim 1, which is characterized in that described to tie up a voltage tune
The quantity of resistance is no more than 20 in whole resistance.
6. the adjustment method of display panel gray scale voltage according to claim 1, which is characterized in that the grayscale partial pressure electricity
The corresponding target gray scale brightness of the output end of j-th of resistance is according to maximum gray, maximum gray brightness and the grayscale in road
The corresponding grayscale of the output end of j-th of resistance in bleeder circuit, and the gamma curve of setting is combined to be calculated.
7. a kind of debugging apparatus of display panel gray scale voltage, which is characterized in that including：Gamma register ties up a voltage adjustment
Circuit, grayscale bleeder circuit and resistance built-up circuit；Wherein, a voltage-regulating circuit of tying up includes n series resistance,
The grayscale bleeder circuit includes m series resistance, and the input terminal for tying up first resistance in a voltage-regulating circuit is made
It is tied up a little for first, the output end for tying up last resistor in a voltage-regulating circuit is tied up a little as (n+1)th, and described
The output end for tying up each resistance in a voltage-regulating circuit is tied up a little as one；
The gamma register, for adjusting first voltage tied up a little and (n+1)th voltage tied up a little so that institute
It states the voltage that first is tied up a little with maximum gray voltage to match, and (n+1)th voltage tied up a little and minimum gray voltage
Match；
And the gamma register is additionally operable to output control signals to the resistance built-up circuit, to control the resistance switching electricity
The input terminal for being a little connected to first resistance in the grayscale bleeder circuit is tied up described first on road, and described (n+1)th is tied up
Point is connected to the output end of first resistance in the grayscale bleeder circuit, and i-th is tied up and a little divides electricity with the grayscale
The output end of different resistance is sequentially connected respectively in road, when i-th is tied up a little with j-th of resistance in the grayscale bleeder circuit
Output end connection when, be delivered to using the output end voltage of j-th of resistance in the grayscale bleeder circuit as data voltage aobvious
Show panel, when the brightness of display panel meets the corresponding target gray scale of output end of j-th of resistance in the grayscale bleeder circuit
When brightness, then the gray scale voltage tied up j-th of resistance output end voltage in the grayscale bleeder circuit a little as i-th；Its
In, 1<i<N, 0<j<m.
8. the debugging apparatus of display panel gray scale voltage according to claim 7, which is characterized in that described to tie up a voltage tune
The resistance value all same of n resistance in whole circuit, and in the grayscale bleeder circuit m resistance resistance value all same.
9. the debugging apparatus of display panel gray scale voltage according to claim 8, which is characterized in that the maximum gray electricity
Pressure is 255 gray scale voltages, and the minimum gray voltage is 0 gray scale voltage；Each resistance is defeated in the grayscale bleeder circuit
Go out terminal voltage and corresponds to a gray scale voltage.
10. the debugging apparatus of display panel gray scale voltage according to claim 7, which is characterized in that described to tie up voltage
The quantity for adjusting resistance in resistance is no more than 20.
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| CN201810742079.3A CN108597447A (en) | 2018-07-09 | 2018-07-09 | A kind of adjustment method and device of display panel gray scale voltage |
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| CN201810742079.3A CN108597447A (en) | 2018-07-09 | 2018-07-09 | A kind of adjustment method and device of display panel gray scale voltage |
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