CN107393454A - The method for obtaining liquid crystal display panel charge rate - Google Patents
The method for obtaining liquid crystal display panel charge rate Download PDFInfo
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- CN107393454A CN107393454A CN201710711423.8A CN201710711423A CN107393454A CN 107393454 A CN107393454 A CN 107393454A CN 201710711423 A CN201710711423 A CN 201710711423A CN 107393454 A CN107393454 A CN 107393454A
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The embodiment of the invention discloses a kind of method for obtaining liquid crystal display panel charge rate, including：Obtain the driving voltage brightness penetrance curve of the liquid crystal display panel；Obtain the first brightness of the picture that liquid crystal display panel is shown in the period 1, wherein, the period 1 includes the first total charging time being made up of the multiple first sub- charging intervals, first voltage and second voltage described in every data wire alternate transport in the first total charging time liquid crystal display panel, wherein, the voltage of corresponding 0 GTG of the first voltage, the second voltage corresponds to the voltage of non-zero GTG, and the time that any one data wire transmits the second voltage every time is a first sub- charging interval；Actual pixels voltage is obtained according to driving voltage brightness penetrance curve, the first brightness；Charge rate is obtained according to the actual pixels voltage and the ratio of the second voltage.Using the present invention, there is the advantages of charge rate that can actually obtain liquid crystal display panel.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of side for obtaining liquid crystal display panel charge rate
Method.
Background technology
Existing liquid crystal display panel, Fig. 1 is referred to, including a plurality of scan line SL extended in transverse direction and a plurality of edge
The data wire DL, the scan line SL and the data wire DL of longitudinal direction extension, which intersect, surrounds more several pixel cells 100, often
Individual pixel cell 100 includes thin film transistor (TFT) 110 and pixel electrode 120, and the grid electrical connection of the thin film transistor (TFT) 110 is corresponding
Scan line SL, its source electrode electrical connection respective data lines DL, its electrical connection respective pixel electrode 120 that drains.When scan line SL is inputted
During cut-in voltage, the grid of thin film transistor (TFT) 110 is opened, corresponding, and the data wire DL transmission required voltages of pixel electrode 120 are given
Pixel electrode 120, to supply electricity to pixel electrode 120, pixel electrode 120 is an electrode of pixel capacitance.
With the development of technology, existing liquid crystal display panel increasingly pursues quality, and the charging feelings of pixel electrode 120
Condition is critically important, directly affects the display performances such as penetrance, the image quality of liquid crystal display panel, and prior art typically passes through charge rate
(Charging Ratio) this index characterizes the charge condition of pixel electrode 120, and the value of charge rate is equal to pixel electrode 120
On voltage Vpixel divided by respective data lines DL on voltage Vdata.
As shown in Figure 2 a, it is generally the case that the grid opening time of thin film transistor (TFT) 110 is equal to data wire DL service voltages
To the time of pixel electrode 120, in the absence of preliminary filling, but such a mode charge rate to be charged to pixel electrode 120 is than relatively low.For
The charge rate of lifting liquid crystal display panel, prior art propose the mode of precharge (Precharge), refer to Fig. 2 b, this
When, the grid opening time of thin film transistor (TFT) 110 is more than time of the data wire DL service voltages to pixel electrode 120, Ci Zhongfang
Formula can lift the charge rate of liquid crystal display panel, and charge rate can reach or very close to 100%.
In order to obtain the charge rate of liquid crystal display panel, prior art proposes a kind of method, refers to Fig. 3, including with
Lower step：
S110：Determine the layout of pixel electrode 120；
S120：It is determined that form the thickness and electrical parameter of each film layer of pixel capacitance, such as electrical conductivity, dielectric constant；
S130:Extract related electric capacity, such as resistance, pixel capacitance, storage capacitance；
S140：TFT characterisitic parameter is established according to the characteristic of thin film transistor (TFT) 110；
S150：Spice models are established according to the type of drive of liquid crystal display panel；
S160：The voltage on pixel electrode 120 is simulated, calculates charge rate.
However, such a method for obtaining liquid crystal display panel charge rate by establishing Spice modelings, is only simulated
As a result, accuracy can not ensure, and can not pass through experimental verification.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is, there is provided a kind of side for obtaining liquid crystal display panel charge rate
Method.The charge rate of liquid crystal display panel can actually be obtained.
In order to solve the above-mentioned technical problem, the embodiments of the invention provide a kind of side for obtaining liquid crystal display panel charge rate
Method, the liquid crystal display panel include multiple pixel electrodes, a plurality of data lines, and the liquid crystal display panel is equipped with precharge and set
Meter, including：
Obtain driving voltage-brightness penetrance curve of the liquid crystal display panel；
The first brightness of the picture that liquid crystal display panel is shown in the period 1 is obtained, wherein, the period 1 includes
The first total charging time being made up of the multiple first sub- charging intervals, in the every of the first total charging time liquid crystal display panel
Data wire alternate transport first voltage and second voltage described in bar, wherein, the voltage of corresponding 0 GTG of the first voltage is described
Second voltage corresponds to the voltage of non-zero GTG, and the time that any one data wire transmits the second voltage every time is one
The first sub- charging interval；
Actual pixels voltage is obtained according to the driving voltage-brightness penetrance curve, first brightness；
Charge rate is obtained according to the actual pixels voltage and the ratio of the second voltage.
In an embodiment of the present invention, the time that any one data wire transmits the first voltage every time be more than or
The time of the second voltage is transmitted equal to it.
In an embodiment of the present invention, the data wire transmits described in time and each transmission of the first voltage every time
The time ratios scope of second voltage is 10:1~1:1.
In an embodiment of the present invention, all data wires of any instant in first total charging time upload
Defeated voltage is identical；Or data line transfer institute described in any instant a portion in first total charging time
State first voltage, second voltage described in data line transfer described in another part.
In an embodiment of the present invention, it is described to be obtained according to the driving voltage-brightness penetrance curve, first brightness
The actual pixels voltage steps are obtained to specifically include：
Confirm in the time of first voltage described in all data line transfers of first total charging time and with owning
The ratio of the time sum of second voltage described in the data line transfer；
Intermediate luminance is determined according to the ratio, first brightness；
The intermediate luminance is substituted into the driving voltage-brightness penetrance curve and obtains the actual pixels voltage.
In an embodiment of the present invention, penetrated in the driving voltage-brightness for obtaining the liquid crystal display panel
Also included before the step of rate curve：
The second brightness of the picture that liquid crystal display panel is shown respectively in N number of second round is obtained, wherein, N is more than 2
Integer, second round include the second total charging time, in all numbers of the second total charging time of any one second round
The voltage voltage phase that is identical, and being transmitted described in the second total charging time of any two second round on data wire transmitted according to line
It is different.
In an embodiment of the present invention, the driving voltage-brightness penetrance for obtaining the liquid crystal display panel
The step of curve map, specifically includes：
According to N number of different voltage, it is N number of corresponding to second brightness obtain the driving of the liquid crystal display panel
Voltage-brightness penetrance curve map.
In an embodiment of the present invention, the second voltage corresponds to the voltage of lime rank.
In an embodiment of the present invention, the lime rank is 255 GTGs.
In an embodiment of the present invention, the liquid crystal display panel is normally black mode liquid crystal display panel.
Implement the embodiment of the present invention, have the advantages that：
Because methods described includes obtaining driving voltage-brightness penetrance curve of the liquid crystal display panel, liquid is obtained
First brightness of the picture that LCD panel is shown in the period 1, according to driving voltage-brightness penetrance curve, the first brightness
Actual pixels voltage is obtained, charge rate is obtained according to actual pixels voltage and the ratio of second voltage.It is hereby achieved that liquid crystal
The charge rate of display panel, the charge rate is the actual charge rate of liquid crystal display panel, so as to which accuracy can be guaranteed,
It can be used for the accuracy for verifying the analog charge rate that prior art obtains.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of prior art liquid crystal display panel；
Fig. 2 a, Fig. 2 b are that one pixel electrode of prior art is not equipped with precharge and charged normal after being equipped with precharge respectively
Schematic diagram；
Fig. 3 is the method that prior art obtains charge rate by establishing Spice modelings；
Fig. 4 is the method that one embodiment of the invention obtains liquid crystal display panel charge rate；
Fig. 5 is the schematic diagram for the picture that one embodiment of the invention liquid crystal display panel is shown in the period 1；
Fig. 6 is the schematic diagram for the picture that another embodiment of the present invention liquid crystal display panel is shown in the period 1；
Fig. 7 is the schematic diagram for the picture that further embodiment of this invention liquid crystal display panel is shown in the period 1；
Fig. 8 is the specific steps flow chart of step S240 in Fig. 4.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The term " comprising " and " having " occurred in present specification, claims and accompanying drawing and their any changes
Shape, it is intended that cover non-exclusive include.Such as contain the process of series of steps or unit, method, system, product or
The step of equipment is not limited to list or unit, but alternatively also include the step of not listing or unit, or it is optional
Ground is also included for the intrinsic other steps of these processes, method, product or equipment or unit.In addition, term " first ", " the
Two " and " the 3rd " etc. are for distinguishing different objects, and are not intended to describe specific order.
The embodiment of the present invention provides a kind of method for obtaining liquid crystal display panel charge rate, and the liquid crystal display panel includes
The a plurality of scan line SL extended in transverse direction and a plurality of data wire DL, the scan line SL extendable in the longitudinal direction and described
Data wire DL, which intersects, surrounds more several pixel cells 200, and each pixel cell 200 includes thin film transistor (TFT) 210 and pixel electrode
220, the corresponding scan line SL of grid electrical connection of the thin film transistor (TFT) 210, its source electrode electrical connection respective data lines DL, it drains
Electrically connect respective pixel electrode 220.When scan line SL inputs cut-in voltage, the grid of thin film transistor (TFT) 210 is opened, corresponding
, data wire DL transmits the required voltage of pixel electrode 220 to pixel electrode 220, (is referred to supplying electricity to pixel electrode 220
Fig. 5, Fig. 6, Fig. 7).The liquid crystal display panel is equipped with precharge design, namely the pixel electrode 220 before liquid crystal display panel
In charging, pixel electrode 220 below can also enter line precharge (reference can be made to Fig. 2 b) therewith.Refer to Fig. 4, methods described bag
Include：
S220：Obtain driving voltage-brightness penetrance (V-T) curve of the liquid crystal display panel；
In the present embodiment, the driving voltage-brightness penetrance (V-T) curve can be by measuring, the drive
Move the driving voltage brightness penetrance curve that voltage-brightness penetrance (V-T) curve is whole liquid crystal display panel, namely curve
In each coordinate points represent be whole liquid crystal display panel driving voltage and corresponding whole liquid crystal display panel it is bright
Degree.
S230：The first brightness of the picture that liquid crystal display panel is shown in the period 1 is obtained, wherein, the period 1 includes
The first total charging time being made up of the multiple first sub- charging intervals, in every number of the first total charging time liquid crystal display panel
According to line DL alternate transports first voltage and second voltage, wherein, the voltage of corresponding 0 GTG of first voltage, second voltage corresponds to non-zero
The voltage of GTG, when the time that any one data wire DL transmits second voltage every time charges for first son
Between；
In the present embodiment, first brightness can be detected for example, by imaging sensor (CCD) and obtained, the period 1
For the time of a picture frame (Frame), the period 1 includes the first total charging time and the first blanking time, and described first always fills
The electric time is that first scan line SL is opened this period closed to a last scan line SL, namely is given per data line DL
The time sum that pixel electrode 220 charges, first total charging time are made up of the multiple first sub- charging intervals, and each first
The sub- charging interval is the time (time for not including precharge) that each pixel electrode 220 formally charges, and the blanking time is last
This period that one scan line SL starts after closing to next cycle.In the every of the first total charging time liquid crystal display panel
Data line DL alternate transports first voltage and second voltage, such as in some the first sub- charging interval data line DL transmission
First voltage, second voltage is transmitted in the next first data line DL of sub- charging interval, when ensuing first son charges
Between transmission first voltage again, the first sub- charging interval next transmits second voltage again ....In the present embodiment, please join
See Fig. 5, the voltage transmitted on any time all data wire DL of the first total charging time is identical, namely in first total charging
The voltage transmitted on any time any two data lines DL of time is identical, namely all data wire DL simultaneous transmissions
One voltage (pixel electrode 220 that black patch represents in Figure 5 represents that the pixel electrode 220 fills first voltage) or simultaneous transmission the
Two voltages (pixel electrode 220 that oblique line represents in Figure 5 represents that the pixel electrode 220 fills second voltage), that is, with a line picture
The voltage being supplied on plain electrode 220 is identical.It is but in other embodiments of the invention, total first the invention is not restricted to this
Data wire DL described in any instant a portion in charging interval transmits first voltage, and data wire DL described in another part is passed
Defeated second voltage, for example, refer to Fig. 6, sometime (such as corresponding Article 4 scan line SL open at the time of), first
First voltage is transmitted on data wire DL1, second voltage is transmitted on the second data line DL2 adjacent with the first data line DL1,
Adjacent with the second data line DL2 Article 3 data wire DL3 transmission first voltage, adjacent with Article 3 data wire DL3 the
Four data line DL4 transmit second voltage ..., that is, the voltage of the transmission on the adjacent data wire DL of synchronization is not
Together；In another example sometime, first voltage, Article 3 are transmitted on the first data line DL1, on the second data line DL2
Transmit second voltage on data wire DL3, on Article 4 data wire DL4, transmit first voltage on Article 5 data wire DL5, the 6th
Second voltage is transmitted on data line DL6 ....
In the present embodiment, any one data wire DL is alternate transport first voltage and second voltage, at this
In, alternating refers to that any one data line DL transmits first voltage in first time period first, is next passed in second time period
Defeated second voltage, first voltage next is transmitted in the 3rd period, then transmits second voltage ... in the 4th period,
Or any one data line DL transmits second voltage in first time period first, next in the electricity of second time period transmission first
Pressure, second voltage next is transmitted in the 3rd period, then transmit first voltage ... in the 4th period.Herein, appoint
The time that meaning a data line DL transmits second voltage every time is equal, is a first sub- charging interval, for example, the K articles number
M second voltage is transmitted in the first total charging time according to line DL, the time for transmitting second voltage in M times every time is one
First sub- charging interval (K, M are positive integer).Moreover, the time that same data line DL transmits first voltage every time can phase
Deng, can also be unequal, for example, K data lines DL transmits J first voltage in the first total charging time, it is every in J times
The time of secondary transmission first voltage can be with equal, can also be unequal；Moreover, transmission first is electric every time between different pieces of information line DL
The time of pressure can be with equal, can also be unequal, for example, M data lines DL is transmitted J times in the first total charging time
One voltage, L data lines DL also transmits P first voltage in the first total charging time, and (M, L, J, P are positive integer, M, L
Both are unequal, and both J, P can be with equal, can also be unequal), the upper kth time of M data lines DL transmit first voltage when
Between can be with equal with time of kth on L data lines DL time transmission first voltage, can also unequal (k be positive integer, and k is small
In or equal to J).
Continuing with referring to Fig. 5, in the present embodiment, first is given in all data wire DL transmission second voltages of first time period
Row pixel electrode 220, the first time period are equal to a first sub- charging interval, and now the second row pixel electrode 220 is carried out
Precharge；Next, the second row pixel electrode 220 given in all data wire DL transmission first voltages of second time period, described
Second time period is equal to a first sub- charging interval, and now the third line pixel electrode 220 enters line precharge；Then, the 3rd
The third line pixel electrode 220 that period all data wire DL transmission second voltages are given, the 3rd period are equal to one the
One sub- charging interval, now fourth line pixel electrode 220 enter line precharge；Then, passed in the 4th period all data wire DL
The fourth line pixel electrode 220 that defeated first voltage is given, the 4th period are equal to a first sub- charging interval, and now the 5th
Row pixel electrode 220 enters line precharge；….Herein, first time period, second time period, the 3rd period, the 4th time
Section ... it was equal to for the first sub- charging interval.Certainly, the first row pixel electrode 220 first filled first voltage can also, below suitable
Sequence to it is above similar.But the invention is not restricted to this, in other embodiments of the invention, refers to Fig. 7, in first time period institute
There are data wire DL transmission second voltages to the first row pixel electrode 220, when the first time period is equal to one first son charging
Between, when the first row pixel electrode 220 charges, the second row pixel electrode 220 enters line precharge；Next, in second time period
All data wire DL transmit first voltage to the second row pixel electrode 220, the third line pixel electrode 220 successively, when described second
Between section be equal to two the first sub- charging intervals, when the second row pixel electrode 220 charges, the third line pixel electrode 220 carries out pre-
Charging, when the third line pixel electrode 220 is charged, fourth line pixel electrode 220 enters line precharge；Then, at the 3rd
Between the fourth line pixel electrode 220 given of all data wire DL of section transmission second voltages, the 3rd period is equal to one first
In the sub- charging interval, when fourth line pixel electrode 220 charges, fifth line pixel electrode 220 enters line precharge；In the 4th period
All data wire DL transmit first voltage to fifth line pixel electrode 220, the 6th row pixel electrode 220, the 7th row pixel successively
Electrode 220, the 4th period are equal to three the first sub- charging intervals, when fifth line pixel electrode 220 charges, the 6th row
Pixel electrode 220 enters line precharge, and when the 6th row pixel electrode 220 charges, the 7th row pixel electrode 220 enters line precharge,
When the 7th row pixel electrode 220 is charged, the 8th row pixel electrode 220 enters line precharge；….Herein, the very first time
Section, the 3rd period are equal to a first sub- charging interval, and second time period is equal to two the first sub- charging intervals, when the 4th
Between section be equal to three the first sub- charging intervals.In other embodiments of the invention, own in second time period, the 4th period
Data wire DL transmit successively first voltage to three row pixel electrodes 220, four row pixel electrodes 220, five-element's pixel electrode 220 ...,
Ten row pixel electrodes 220, second voltage is transmitted successively to following one in first time period, the 3rd period all data wire DL
Row pixel electrode 220 can also.
In the present embodiment, the voltage of corresponding 0 GTG of the first voltage (represents to fill the in Fig. 5, Fig. 6, Fig. 7 with black patch
The pixel electrode 220 of one voltage), wherein, the voltage of 0 GTG is grey black rank, and in the present embodiment, the liquid crystal display panel is
Normally black mode liquid crystal display panel, the voltage being equal to so as to first voltage on the common electrode of liquid crystal display panel.Described second
Voltage corresponds to the voltage (in Fig. 5, Fig. 6, Fig. 7 with oblique line represented fill the pixel electrode 220 of second voltage) of non-zero GTG, Ye Ji
After two voltages are to pixel electrode 220, pixel capacitance meeting printing opacity, in the present embodiment, the second voltage corresponds to the electricity of lime rank
Pressure, it is, in general, that lime rank is generally 255 GTGs, certainly, in other embodiments of the invention, when the lime rank may be used also
Think other GTGs.
Continuing with referring to Fig. 5, in the present embodiment, any one data wire DL transmits the time of second voltage every time
For a sub- charging interval, so as to a pixel electrode 220 before all pixel electrodes 220 for being filled second voltage and below
One pixel electrode 220 is all the pixel electrode 220 for being filled first voltage, so as to all pixel electrodes for being filled second voltage
220 charging effect is identical, so as to ensure that the charge rate of all pixel electrodes 220 for being filled second voltage is identical.
In the present embodiment, the time that any one data wire DL transmits first voltage every time is more than or equal to its transmission second voltage
Time, for example, the data wire DL transmit every time first voltage time and every time transmission second voltage time ratios model
Enclose for 10:1~1:1, for example, the time that the data wire DL transmits first voltage every time is the first sub- charging interval, two
Individual first sub- charging interval, three the first sub- charging intervals, four the first sub- charging intervals, five the first sub- charging intervals, six
Individual first sub- charging interval, seven the first sub- charging intervals, eight the first sub- charging intervals, nine the first sub- charging intervals, ten
Individual first sub- charging interval, in the present embodiment, the time that the data wire DL transmits first voltage every time are equal to its biography every time
The time of defeated second voltage, it is a first sub- charging interval.
S240：Pixel voltage is obtained according to driving voltage-brightness penetrance curve, the first brightness；
In the present embodiment, by all data wire DL of the first total charging time transmission first voltages time and with institute
The ratio for having the time sum of data wire DL transmission second voltages is 1:1, so as to which half is supplied to first on all pixels electrode 220
Voltage, half is supplied to second voltage, and first voltage corresponds to the voltage of 0 GTG, and 0 GTG is grey black rank, and grey black rank can compare
Accurately fill to pixel electrode 220, half can be lowered so as to the brightness of liquid crystal display panel, and driving voltage-brightness penetrates
Brightness in rate curve is the brightness of whole liquid crystal display panel, in order to obtain the complete brightness of liquid crystal display panel, in this reality
Apply in example, the first brightness of acquisition is double, namely twice of the first brightness is just the brightness of whole liquid crystal display panel, will be whole
The brightness of individual liquid crystal display panel is brought into driving voltage-brightness penetrance curve, due to brightness it has been determined that so as to drive electricity
Pressure is assured that, it is hereby achieved that the actual pixels voltage that pixel electrode 220 obtains after charging, due to that can have charging not
The problem of sufficient, so as to which the actual pixels voltage can be less than second voltage.
Particularly, Fig. 8 is referred to, step S240 includes：
S241：Confirm all data wire DL of the first total charging time transmission first voltages time and with all data wires
The ratio of the time sum of DL transmission second voltages；
In order to facilitate description, it is assumed that all data wire DL of the first total charging time transmission first voltages time and with institute
The ratio for stating the time sum of data wire DL transmission second voltages is a:B, wherein a are more than or equal to b, herein, are always filled first
The time of electric time all data wire DL transmission first voltages and the time equal to pieces of data line DL transmission first voltages and, often
The time of data line DL transmission first voltages for data line DL transmit every time first voltage time and, equally, the
The time of all data wire DL of one total charging time transmission second voltages and equal to pieces of data line DL transmission second voltages when
Between and, per data line DL the time of transmission second voltage for data line DL transmit every time second voltage time and.
In the present embodiment, a is equal to b, namely all data wire DL transmission first voltages of the first total charging time time and with
The ratio of the time sum of the data wire DL transmission second voltage is 1:1, certainly, in other embodiments of the invention,
The time of all data wire DL transmission first voltages of one total charging time and the time with data wire DL transmission second voltages
The ratio of sum can not also be 1:1, for example, 2:1、3：1、4:1、5:1、6:1、7:1、8:1、9:1、10:1 etc..
S242：Intermediate luminance is determined according to the ratio, the first brightness；
If passed in the time of all data wire DL transmission first voltages of the first total charging time and with the data wire DL
The ratio of the time sum of defeated second voltage is a：B, due to being grey black rank corresponding to first voltage, so as to obtain the picture of first voltage
Plain electrode 220 will not printing opacity, and obtain second voltage pixel electrode 220 can printing opacity, so as to obtain the pixel of first voltage electricity
Pole 220 is the brightness for reducing whole display panel, and herein, intermediate luminance represents the pixel of whole liquid crystal display panel
The brightness for the picture that electrode 220 is filled after second voltage, so as to reference to the ratio a:B, the first L1 twice, can obtain centre
Brightness Lm calculation formula is：
In the present embodiment, as a=b, intermediate luminance L calculation formula is transformed to：
Lm=L1 × 2.
S243：The intermediate luminance is substituted into driving voltage-brightness penetrance curve and obtains actual pixels voltage.
Because intermediate luminance represents the brightness for the picture that the pixel electrode 220 of whole display panel is filled after second voltage,
And the brightness in driving voltage-brightness penetrance curve is also the brightness of whole display panel, driven so as to which intermediate luminance be substituted into
Dynamic voltage-brightness penetrance curve, can obtain actual pixels voltage, generally fill second voltage to pixel electrode 220
When, pixel electrode 220 can be not fully filled, so as to which actual pixels voltage corresponding to intermediate luminance can be less than second voltage.
S250：Charge rate is obtained according to actual pixels voltage and the ratio of second voltage.
In the present embodiment, it is known due to charging to the second voltage of pixel electrode 220, the second voltage is to count
According to the voltage on line DL, and actual pixels voltage is the voltage finally obtained on pixel electrode 220, so as to obtain charge rate
Relational expression is as follows:
So as to which charge rate can be obtained according to above-mentioned formula.
In the present embodiment, the driving voltage-brightness for including obtaining the liquid crystal display panel due to methods described penetrates
Rate curve, the first brightness of the picture that liquid crystal display panel is shown in the period 1 is obtained, according to driving voltage-brightness penetrance
Curve, the first brightness obtain actual pixels voltage, and charge rate is obtained according to actual pixels voltage and the ratio of second voltage.So as to
The charge rate of liquid crystal display panel can be obtained, the charge rate is the actual charge rate of liquid crystal display panel, so as to which accuracy can
To be guaranteed, it can be used for verifying the accuracy for the analog charge rate that prior art obtains.
In the present embodiment, continuing with referring to Fig. 4, worn to obtain driving voltage-brightness of the liquid crystal display panel
Saturating rate curve, the present embodiment also include before step S220：
S210：The second brightness of the picture that liquid crystal display panel is shown respectively in N number of second round is obtained, wherein, N is big
In 2 integer, second round includes the second total charging time, in all numbers of the second total charging time of any one second round
The voltage electricity that is identical, and being transmitted described in the second total charging time of any two second round on data wire DL transmitted according to line DL
Press different.
In the present embodiment, second round is the time of a picture frame (Frame), and second round is equal to the period 1, the
Two cycles include the second total charging time and the second blanking time, and the second total charging time is equal to the first total charging time, and second
Blanking time was equal to for the first blanking time.
In the present embodiment, the second brightness of the picture that liquid crystal display panel is shown respectively in N number of second round is obtained, from
And the number of the second brightness is N number of.Because liquid crystal display panel is equipped with precharge design, furthermore, in any one second round
All data wire DL of the second total charging time transmission voltage it is identical, namely the second total charging time in a second round
The voltage that any two data lines DL is transmitted at any time is identical, so as to, voltage on pixel electrode 220 after being electrically charged with
The voltage transmitted on data wire DL is almost identical, and the brightness of the picture of the corresponding display of liquid crystal display panel can be detectd by equipment
Survey and obtain, such as detected and obtained by imaging sensor (CCD), in the now brightness of liquid crystal display panel and pixel electrode 220
Voltage it is corresponding, because the voltage on pixel electrode 220 is again identical with the voltage of precedent transmission data wire DL on, so that now
The brightness of liquid crystal display panel is corresponding with the voltage transmitted on data wire DL, and the voltage transmitted on data wire DL is, it is known that
It is hereby achieved that the voltage transmitted on data wire DL and corresponding brightness, and just there is N number of voltage N number of different second round
Value, it is corresponding to have N number of picture, it is hereby achieved that the second brightness corresponding to N number of, so as to according to N number of different voltage, corresponding
N number of second brightness can draw the driving voltage-brightness penetrance curve for obtaining liquid crystal display panel.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation is all difference with other embodiments, between each embodiment identical similar part mutually referring to.
For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, related part referring to
The part explanation of embodiment of the method.
By the description of above-described embodiment, the present invention has advantages below：
Because methods described includes obtaining driving voltage-brightness penetrance curve of the liquid crystal display panel, liquid is obtained
First brightness of the picture that LCD panel is shown in the period 1, according to driving voltage-brightness penetrance curve, the first brightness
Actual pixels voltage is obtained, charge rate is obtained according to actual pixels voltage and the ratio of second voltage.It is hereby achieved that liquid crystal
The charge rate of display panel, the charge rate is the actual charge rate of liquid crystal display panel, so as to which accuracy can be guaranteed,
It can be used for the accuracy for verifying the analog charge rate that prior art obtains.
Above disclosure is only preferred embodiment of present invention, can not limit the right model of the present invention with this certainly
Enclose, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (10)
1. a kind of method for obtaining liquid crystal display panel charge rate, the liquid crystal display panel include multiple pixel electrodes, a plurality of
Data wire, the liquid crystal display panel are equipped with precharge design, it is characterised in that including：
Obtain driving voltage-brightness penetrance curve of the liquid crystal display panel；
The first brightness of the picture that liquid crystal display panel is shown in the period 1 is obtained, wherein, the period 1 is included by more
The first total charging time that the individual first sub- charging interval is formed, in every institute of the first total charging time liquid crystal display panel
Data wire alternate transport first voltage and second voltage are stated, wherein, the voltage of corresponding 0 GTG of the first voltage, described second
Voltage corresponds to the voltage of non-zero GTG, and any one data wire transmits the time of the second voltage as described in one every time
First sub- charging interval；
Actual pixels voltage is obtained according to the driving voltage-brightness penetrance curve, first brightness；
Charge rate is obtained according to the actual pixels voltage and the ratio of the second voltage.
2. the method for liquid crystal display panel charge rate is obtained as claimed in claim 1, it is characterised in that any one number
The time for transmitting the first voltage every time according to line is more than or equal to the time of its transmission second voltage.
3. the method for liquid crystal display panel charge rate is obtained as claimed in claim 2, it is characterised in that the data wire is each
The time for transmitting the first voltage and the time ratios scope for transmitting the second voltage every time are 10:1~1:1.
4. the method for liquid crystal display panel charge rate is obtained as claimed in claim 1, it is characterised in that always filled described first
The voltage transmitted on all data wires of any instant in the electric time is identical；Or in first total charging time
Any instant a portion described in first voltage described in data line transfer, second described in data line transfer described in another part
Voltage.
5. the method for liquid crystal display panel charge rate is obtained as claimed in claim 1, it is characterised in that described according to the drive
Dynamic voltage-brightness penetrance curve, first brightness obtain the actual pixels voltage steps and specifically included：
Confirm the time of first voltage described in all data line transfers of first total charging time and with it is all described
The ratio of the time sum of second voltage described in data line transfer；
Intermediate luminance is determined according to the ratio, first brightness；
The intermediate luminance is substituted into the driving voltage-brightness penetrance curve and obtains the actual pixels voltage.
6. the method for liquid crystal display panel charge rate is obtained as claimed in claim 1, it is characterised in that described in the acquisition
Also included before the step of driving voltage of liquid crystal display panel-brightness penetrance curve：
The second brightness of the picture that liquid crystal display panel is shown respectively in N number of second round is obtained, wherein, N is whole more than 2
Number, second round includes the second total charging time, in all data of the second total charging time of any one second round
The voltage voltage phase that is identical, and being transmitted described in the second total charging time of any two second round on data wire of line transmission
It is different.
7. the method for liquid crystal display panel charge rate is obtained as claimed in claim 6, it is characterised in that described to obtain the liquid
The step of driving voltage of LCD panel-brightness penetrance curve map, specifically includes：
According to N number of different voltage, it is N number of corresponding to second brightness obtain the driving electricity of the liquid crystal display panel
Pressure-brightness penetrance curve map.
8. the method for the acquisition liquid crystal display panel charge rate as described in claim 1-7 any one, it is characterised in that described
Second voltage corresponds to the voltage of lime rank.
9. the method for liquid crystal display panel charge rate is obtained as claimed in claim 8, it is characterised in that the lime rank is
255 GTGs.
10. the method for the acquisition liquid crystal display panel charge rate as described in claim 1-7 any one, it is characterised in that institute
It is normally black mode liquid crystal display panel to state liquid crystal display panel.
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| CN108962110A (en) * | 2018-08-09 | 2018-12-07 | 京东方科技集团股份有限公司 | The method for obtaining liquid crystal display panel charge rate |
| WO2020124825A1 (en) * | 2018-12-17 | 2020-06-25 | 深圳市华星光电半导体显示技术有限公司 | Charging test method and charging test device |
| CN112289276A (en) * | 2020-11-04 | 2021-01-29 | 武汉华星光电技术有限公司 | Penetration rate optimization method and device of liquid crystal display panel and electronic equipment |
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| CN108962110A (en) * | 2018-08-09 | 2018-12-07 | 京东方科技集团股份有限公司 | The method for obtaining liquid crystal display panel charge rate |
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| WO2020124825A1 (en) * | 2018-12-17 | 2020-06-25 | 深圳市华星光电半导体显示技术有限公司 | Charging test method and charging test device |
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| CN107393454B (en) | 2020-09-04 |
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