CN109994081A - Display device and its operating method - Google Patents
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- CN109994081A CN109994081A CN201810004043.5A CN201810004043A CN109994081A CN 109994081 A CN109994081 A CN 109994081A CN 201810004043 A CN201810004043 A CN 201810004043A CN 109994081 A CN109994081 A CN 109994081A
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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
- G09G3/34—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
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- Theoretical Computer Science (AREA)
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- Liquid Crystal Display Device Control (AREA)
Abstract
A kind of display device, including sequence controller and source electrode driver.Sequence controller generates an adjustment pulse every a preset time, and within a preset time received in sequence the 1st to n-th picture data.Sequence controller adjusts (K+1) to n-th picture data according to multiple compensating gains adjustment the 1st to k-th picture data, and according to fixed gain.Fixed gain is greater than the multiple compensating gain.K and N are integer, and 1 < K < N.Source electrode driver generates the 1st to n-th driving voltage group according to the adjusted 1st to n-th picture data.Source electrode driver is in response to adjusting pulse inversion polarity control signal, and the polarity according to the polarity control signal adjustment the 1st after reverse phase to n-th driving voltage group.
Description
Technical field
The present invention relates to a kind of display technologies, and in particular to a kind of display device and its operating method.
Background technique
In general, liquid crystal display (LCD) can be every the shadow of adjustment in 28 seconds in order to avoid ghost occurs in image frame
As the transfer sequence of the polarity of voltage of picture.However, the initial stage of the transfer sequence in adjustment polarity of voltage, liquid crystal display is often
It must charge first with the driving voltage of identical polar to the same pixel in display panel.In the case, it shows
Pixel in panel often overcharges (over charge), and then display panel is caused showing for flashing (flicker) occur
As.
For example, Fig. 1 is the waveform diagram for illustrating to charge to pixel using opposed polarity and same polarity voltage.
As shown in Figure 1, the same pixel in display panel may be in response to scanning pulse P11 and P12 and successively be turned on.In addition, such as Fig. 1
The upper half shown in, when liquid crystal display in response to polarity control signal POL11 and is successively driven using positive polarity and negative polarity
When voltage charges to same pixel, the voltage V11 of pixel there will not be the phenomenon that overcharging.On the other hand, such as Fig. 1
Lower half shown in, when liquid crystal display is all successively using positive polarity driving voltage in response to polarity control signal POL12
When charging to same pixel, the voltage V12 of pixel will excessively be saturated and voltage difference delta V occur, and then lead to display panel
The phenomenon that flashing.
Summary of the invention
The present invention provides a kind of display device and its operating method, and ghost occurs in avoidable image frame, and can avoid dodging
The generation of bright phenomenon.
Display device of the invention, including sequence controller and source electrode driver.Sequence controller is every a preset time
Generate an adjustment pulse, and within a preset time received in sequence the 1st to n-th picture data.Sequence controller is according to multiple benefits
Gain adjustment the 1st is repaid to k-th picture data, and according to fixed gain adjustment (K+1) to n-th picture data.It is fixed to increase
Benefit is greater than the multiple compensating gain.K and N are integer, and 1 < K < N.Source electrode driver is according to the adjusted 1st to n-th
Picture data generates the 1st to n-th driving voltage group.Source electrode driver in response to adjust pulse inversion polarity control signal, and
Polarity according to the polarity control signal adjustment the 1st after reverse phase to n-th driving voltage group.
The operating method of display device of the invention, includes the following steps.By the sequence controller in display device, often
Generate an adjustment pulse every a preset time, and within a preset time received in sequence the 1st to n-th picture data.According to multiple
Compensating gain adjustment the 1st is to k-th picture data, and according to fixed gain adjustment (K+1) to n-th picture data.It is fixed
Gain is greater than the multiple compensating gain.K and N are integer, and 1 < K < N.Pass through the source electrode driver in display device, foundation
Adjusted 1st generates the 1st to n-th driving voltage group to n-th picture data.In response to adjustment pulse inversion polarity control
Signal, and the polarity according to the polarity control signal adjustment the 1st after reverse phase to n-th driving voltage group.
Based on above-mentioned, of the invention display device and its operating method, using multiple compensating gains and fixed gain tune
Whole 1st to n-th picture data, and the 1st can be adjusted according to the polarity control signal after reverse phase to the pole of n-th driving voltage group
Property.Whereby, is there is into ghost in avoidable image frame, and can avoid the generation of scintillation.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to cooperate attached drawing to make
Carefully it is described as follows.
Detailed description of the invention
Fig. 1 is the waveform diagram for illustrating to charge to pixel using opposed polarity and same polarity voltage.
Fig. 2 is the block diagram according to the display device of one embodiment of the invention.
Fig. 3 is the flow chart according to the display device of one embodiment of the invention.
Fig. 4 is the signal timing diagram according to the display device of one embodiment of the invention.
Label declaration
P11, P12: scanning pulse
POL, POL11, POL12: polarity control signal
V11, V12: voltage
Δ V: voltage difference
200: display device
210: sequence controller
220: source electrode driver
230: gate drivers
240: display panel
211: counting circuit
212: gain adjustment circuit
250: counter
260: arbiter
D1~DN: picture data
B1~BN: picture data adjusted
S21: adjustment pulse
S22: resetting pulse
VR: count value
S310~S360, S311, S312, S331, S332, S361, S362: each step in Fig. 3
T41: first period
T42: the second phase
T43: during third
D0: previous picture data
B0: previous picture data adjusted
G1~GK: compensating gain
GT: fixed gain
F0~FN: image frame
Specific embodiment
Fig. 2 is the block diagram according to the display device of one embodiment of the invention.As shown in Fig. 2, display device 200 includes timing
Controller 210, source electrode driver 220, gate drivers 230 and display panel 240.In addition, sequence controller 210 includes counting
Circuit 211 and gain adjustment circuit 212, and counting circuit 211 includes counter 250 and arbiter 260.Wherein, display device
200 can be for example a liquid crystal display (LCD).Sequence controller 210 is electrically connected source electrode driver 220 and gate drivers
230, and source electrode driver 220 and gate drivers 230 are electrically connected display panel 240.Display device 200 can be driven by source electrode
Dynamic device 220 drives display panel 240 with gate drivers 230.
Operationally, counting circuit 211 can generate an adjustment pulse S21 every a preset time (for example, 28 seconds), and can
By the 1st to n-th picture data D1~DNIt is sent to gain adjustment circuit 212.In addition, gain adjustment circuit 212 can utilize it is multiple
Compensating gain and fixed gain adjustment the 1st to n-th picture data D1~DN, and the adjusted 1st is generated accordingly to n-th picture
Face data B1~BN。
Source electrode driver 220 can be according to the adjusted 1st to n-th picture data B1~BNThe 1st is generated to n-th driving
Voltage group.In addition, source electrode driver 220 can be according to adjustment polarity control signal of the pulse S21 reverse phase from sequence controller 210
POL, and can be according to the polarity of the adjustment of the polarity control signal POL after reverse phase the 1st to n-th driving voltage group.In other words, it shows
Device 200 can be according to the transfer sequence of the polarity of voltage of adjustment pulse S21 adjustment image frame.
For example, for the same pixel in display panel 240, before polarity control signal POL is inverted,
The transfer sequence of polarity of voltage corresponding to pixel script can be for example (+), (-) ..., (+), (-), wherein (+) be used for table
Show positive polarity driving voltage, and (-) is used to indicate negative polarity driving voltage.In addition, when polarity control signal POL is inverted it
Afterwards, the transfer sequence of polarity of voltage corresponding to pixel will be changed to (-), (+) ..., (-), (+).Whereby, it will can avoid aobvious
Show that ghost occurs in panel 240.In addition to this, since display device 200 has been adjusted first with multiple compensating gains and fixed gain
1st to n-th picture data D1~DN, therefore the pixel that can avoid in display panel 240 overcharges (over charge), from
And there is a phenomenon where flash for avoidable display panel 240.
Fig. 3 is according to the flow chart of the display device of one embodiment of the invention, and Fig. 4 is real according to the present invention one
The signal timing diagram of the display device of example is applied, and will further illustrate display device 200 referring concurrently to Fig. 2 to Fig. 4 below.Such as
Shown in step S310, sequence controller 210 can be produced every a preset time (for example, 28 seconds), that is, every N number of image frame
Raw adjustment pulse S21.
For example, the counter 250 in first period T41, sequence controller 210 can receive N number of previous picture one by one
Face data, the wherein D in Fig. 40To be shown in the n-th previous picture data of first period T41, B0For via gain adjustment
The n-th previous picture data adjusted of circuit 212, and B0=D0XGT, GT are fixed gain.In addition, display device 200 can be rung
It should be in n-th previous picture data B adjusted0Generate image frame F0。
From the point of view of the detailed steps of step S310, as shown in step S311, the countable N number of previous picture of counter 250
The number of face data, and count value VR is generated accordingly.For example, counter 250, which often receives a previous picture data, will then count
Numerical value VR adds 1.Arbiter 260 can receive the count value VR from counter 250, and can differentiate whether count value VR is equal to N.Such as
Shown in step S312, when differentiating result is that count value VR is equal to N, the exportable resetting pulse S22 of arbiter 260, and result from
The adjustment pulse S21 of T43 during third.In addition, counter 250 may be in response to resetting pulse S22 resetting count value VR.Change speech
It, the number of the countable N number of previous picture data of counting circuit 211, to generate count value VR.When count value VR is equal to N
When, counting circuit 211 can produce adjustment pulse S21, and reset count value VR.
As shown in step S320, in second phase T42, counting circuit 211 can the N number of picture data of received in sequence, that is, the 1st
To n-th picture data D1~DN.It is noted that counting circuit 211 may be in response to the 1st to n-th picture data D1~DN
Again accumulated counts value VR.In addition, when counting circuit 211 is in response to n-th picture data DNWhen count value VR is added to N,
Counting circuit 211 will result from the adjustment pulse S21 of T43 during third, and reset count value VR again.Wherein, two adjustment arteries and veins
A preset time (for example, 28 seconds) will be separated by by rushing between S21.In other words, counting circuit 211 can be in received in sequence in preset time
1st to n-th picture data D1~DN。
As shown in step S330, sequence controller 210 can adjust the 1st to k-th picture data according to multiple compensating gains
D1~DK, and according to fixed gain GT adjustment (K+1) to n-th picture data DK+1~DN.Wherein, fixed gain GT is greater than institute
Multiple compensating gains, K and N are stated as integer, and 1 < K < N.
For example, gain adjustment circuit 212 may be in response to adjustment pulse S21 and generate fixed gain GT and the multiple benefit
Repay the 1st to k-th compensating gain G in gain1~GK.From the point of view of the detailed steps of step S330, as shown in step S331, increase
Beneficial adjustment circuit 212 can be according to the 1st compensating gain G1Adjust the 1st picture data D1.For example, gain adjustment circuit 212 can incite somebody to action
1st picture data D1Multiplied by the 1st compensating gain G1, to generate the 1st picture data B adjusted1.Also that is, B1=
D1xG1.Similarly, gain adjustment circuit 212 can be by the 2nd picture data D2Multiplied by the 2nd compensating gain G2, to generate adjustment
The 2nd picture data B afterwards2.Also that is, B2=D2xG2.And so on, gain adjustment circuit 212 can be by k-th picture data DK
Multiplied by k-th compensating gain GK, to generate k-th picture data B adjustedK.Also that is, BK=DKxGK。
In other words, sequence controller 210 can be adjusted to generate by i-th of picture data multiplied by i-th of compensating gain
I-th of picture data, wherein i is integer and 1≤i≤K.In addition, (j+1) a compensating gain is greater than j-th of compensating gain, j
For integer and 1≤j≤(K-1).Also that is, G1<G2<……<GK, and compensating gain G1~GKIt can be for example and be respectively smaller than 1.Change speech
It, sequence controller 210 can utilize K compensating gain G1~GKReduce K picture data D1~DKThe multiple pictures for respectively being included
The gray value of prime number evidence.In addition, sequence controller 210 can pass through K gradually incremental compensating gain G1~GK, to gradually decrease K
A picture data D1~DKGray value fall.
As shown in step S332, gain adjustment circuit 212 can adjust (K+1) to n-th picture according to fixed gain GT
Data DK+1~DN.For example, gain adjustment circuit 212 can be by (K+1) a picture data DK+1Multiplied by fixed gain GT, to generate
(K+1) adjusted a picture data BK+1.Also that is, BK+1=DK+1xGT.And so on, gain adjustment circuit 212 can be by N
A picture data DNMultiplied by fixed gain GT, to generate n-th picture data B adjustedN.Also that is, BN=DNxGT.Change speech
It, sequence controller 210 can be by (K+1) to n-th picture data DK+1~DNRespectively multiplied by fixed gain GT, adjusted with generating
(K+1) to n-th picture data B after wholeK+1~BN.Wherein, fixed gain GT can be for example equal to 1.In other words, from
(K+1) a picture data DK+1Start to n-th picture data DN, sequence controller 210 will no longer downgrade each picture data
Gray value.
As shown in step S340, source electrode driver 220 can be according to the adjusted 1st to n-th picture data B1~BNIt generates
1st to n-th driving voltage group, and the 1st to n-th driving voltage group respectively include multiple driving voltages.In addition, such as step
Shown in S350 and S360, source electrode driver 220 may be in response to the adjustment pulse S21 reverse phase of second phase T42 from timing control
The polarity control signal POL of device 210, and source electrode driver 220 can according to the polarity control signal POL after reverse phase adjust the 1st to
The polarity of n-th driving voltage group.In addition, source electrode driver 220 can from the point of view of with regard to the detailed steps S361 and S362 of step S360
Stop the polarity of the 1st driving voltage group of reversion according to the polarity control signal POL after reverse phase, and source electrode driver 220 can be according to
According to the polarity control signal POL after reverse phase invert one by one the 2nd to n-th driving voltage group polarity.
For example, source electrode driver 220 can be according to the 1st picture data B adjusted1Generate the 1st driving voltage
Group.Display device 200 can drive display panel 240 using multiple driving voltages in the 1st driving voltage group, and then cause
Display panel 240 can produce the 1st image frame F1.Since source electrode driver 220 stops the pole of the 1st driving voltage group of reversion
Property, therefore the 1st image frame F1With the image frame F before it0The polarity distribution of corresponding driving voltage is identical.
For example, Fig. 4 embodiment is to enumerate image frame F with dot inversion (dot inversion)0~FNThe pole of corresponding driving voltage
Property distribution.
Similarly, source electrode driver 220 can be according to the 2nd picture data B adjusted2The 2nd driving voltage group is generated,
To cause display panel 240 to can produce the 2nd image frame F2.And so on, display panel 240 may be in response to adjusted
3 to n-th picture data B3~BN, generate the 3rd to n-th image frame F3~FN.Since source electrode driver 220 can be according to anti-
Polarity control signal POL after phase invert one by one the 2nd to n-th driving voltage group polarity, it is N number of therefore in second phase T42
Image frame F1~FNIn the polarity distribution of driving voltage corresponding to wantonly two adjacent image frame be different.
Specifically, display device 200 can be according to adjustment pulse S21 adjustment one every a preset time (for example, 28 seconds)
The transfer sequence of the polarity of voltage of secondary image frame.In addition, whenever display device 200 adjusts image in response to adjustment pulse S21
When the transfer sequence of the polarity of voltage of picture, it is connected at the 1st image frame F adjusted after pulse S211Polarity of voltage will
Stop reversion, and then display device 200 is caused to utilize and previous image picture F0The driving voltage of identical polar shows to drive
Panel 240.
The phenomenon that flashing in order to avoid display panel 240, display device 200 can be first with K compensating gain G1~GK
To reduce previous K picture data D1~DKGray value, and the K picture data D1~DKGray value adjustment amplitude
It can be with K compensating gain G1~GKBe incremented by and gradually decrease.Later, display device 200 can be maintained using fixed gain GT
Or do not change subsequent (N-K) a picture data DK+1~DNGray value.Whereby, with the 1st picture data D1Gray scale
Value downgrades, and the pixel in avoidable display panel 240 is occurred excessively filling under the charging of the driving voltage of identical polar
The phenomenon of electricity, and then can avoid the phenomenon that display panel 240 flashes.In addition, with the K picture data D1~DK's
Adjustment amplitude is gradually successively decreased, and display panel 240 will can be caused to generate stable brightness, also can avoid display panel 240 and occurs
The phenomenon that flashing.
In conclusion the sequence controller in display device of the invention can utilize multiple compensating gains and fixed gain tune
Whole picture data, and an adjustment pulse can be generated every a preset time.Source electrode driver may be in response to adjustment pulse inversion pole
Property control signal, and can according to the polarity control signal after reverse phase adjust driving voltage group polarity.Whereby, display device can
The transfer sequence of the polarity of voltage of an image frame is adjusted every a preset time, and then it is residual to can avoid image frame appearance
Shadow.In addition, the adjustment that picture data is carried out by sequence controller, the phenomenon that avoidable display panel is flashed.
Although the present invention is disclosed as above with embodiment, so it is not intended to limit the present invention, any common skill in this field
Art personnel, without departing from the spirit and scope of the present invention, when can make a little change and retouching, therefore protection scope of the present invention
Subject to view those as defined in claim.
Claims (12)
1. a kind of display device, comprising:
Time schedule controller, every a preset time generate one adjustment pulse, and in the preset time received in sequence 1 the 1st to
N-th picture data, the sequence controller adjust the 1st to k-th picture data according to multiple compensating gains, and solid according to one
Gain adjustment (K+1) is determined to n-th picture data, which is greater than multiple compensating gain, and wherein K and N is whole
Number, and 1 < K < N；And
One source driver generates one the 1st to n-th driving voltage group according to the adjusted 1st to n-th picture data,
And the source electrode driver is in response to one polarity control signal of adjustment pulse inversion, and according to the polarity control signal after reverse phase
Adjust the 1st to n-th driving voltage group polarity.
2. display device as described in claim 1,
Wherein multiple compensating gain includes one the 1st to k-th compensating gain, and the sequence controller is by i-th of picture data
Multiplied by i-th of compensating gain, to generate i-th of picture data adjusted, and the sequence controller by (K+1) extremely
N-th picture data wherein should respectively multiplied by the fixed gain with generating (K+1) adjusted to n-th picture data
(j+1) a compensating gain is greater than j-th of compensating gain, and wherein i is integer and 1≤i≤K, j are integer and 1≤j≤(K-
1)。
3. display device as described in claim 1,
Wherein the source electrode driver stops the pole of the 1st driving voltage group of reversion according to the polarity control signal after reverse phase
Property, and according to the polarity control signal after reverse phase invert one by one the 2nd to n-th driving voltage group polarity.
4. display device as claimed in claim 3, wherein the sequence controller includes:
One counting circuit counts the number of N number of previous picture data to generate a count value, and when the count value is equal to N, should
Counting circuit generates the adjustment pulse, and resets the count value；And
One gain adjustment circuit, in response to the adjustment pulse generate in the fixed gain and multiple compensating gain one the 1st to
K-th compensating gain, and the gain adjustment circuit adjusts i-th of picture data according to i-th of compensating gain, and according to this
Fixed gain adjusts (K+1) to n-th picture data, and wherein (j+1) a compensating gain increases greater than this j-th compensation
Benefit, i is integer and 1≤i≤K, j are integer and 1≤j≤(K-1).
5. display device as claimed in claim 4, wherein the counting circuit includes:
One counter, counts the number of N number of previous picture data, and generates the count value accordingly；And
One arbiter, differentiates whether the count value is equal to N, and when the count value is equal to N, which exports the adjustment arteries and veins
Punching, and a resetting pulse is generated to cause the counter to reset the count value.
6. display device as described in claim 1, further includes:
One display panel is electrically connected the source electrode driver；And
One gate drivers are electrically connected the display panel, and the display device passes through the source electrode driver and the gate driving
Device drives the display panel.
7. a kind of operating method of display device, comprising:
By the time schedule controller in the display device, an adjustment pulse is generated every a preset time, and when this is preset
Interior received in sequence 1 the 1st is to n-th picture data；
The 1st is adjusted to k-th picture data according to multiple compensating gains, and adjusts (K+1) extremely according to a fixed gain
N-th picture data, the fixed gain are greater than multiple compensating gain, and wherein K and N are integer, and 1 < K < N；
By the one source driver in the display device, one the 1st is generated according to the adjusted 1st to n-th picture data
To n-th driving voltage group；And
The 1st is adjusted in response to one polarity control signal of adjustment pulse inversion, and according to the polarity control signal after reverse phase
To the polarity of n-th driving voltage group.
8. the operating method of display device as claimed in claim 7, wherein multiple compensating gain includes one the 1st to k-th
Compensating gain, and the 1st is adjusted to k-th picture data according to multiple compensating gain, and should according to fixed gain adjustment
(K+1) includes: to the step of n-th picture data
By i-th of picture data multiplied by i-th of compensating gain, to generate i-th of picture data adjusted, and this
(j+1) a compensating gain is greater than j-th of compensating gain, and wherein i is integer and 1≤i≤K, j are integer and 1≤j≤(K-1)；
And
By (K+1) to n-th picture data respectively multiplied by the fixed gain, to generate (K+1) to N adjusted
A picture data.
9. the operating method of display device as claimed in claim 8 wherein the 1st to k-th compensating gain is respectively smaller than 1.
10. the operating method of display device as claimed in claim 9, wherein the fixed gain is equal to 1.
11. the operating method of display device as claimed in claim 8, wherein according to the polarity control signal adjustment after reverse phase
1st to n-th driving voltage group polarity the step of include:
Stop the polarity of the 1st driving voltage group of reversion according to the polarity control signal after reverse phase；And
According to the polarity control signal after reverse phase invert one by one the 2nd to n-th driving voltage group polarity.
12. the operating method of display device as claimed in claim 11, wherein generating the adjustment pulse every the preset time
The step of include:
The number of N number of previous picture data is counted, to generate a count value；And
When the count value is equal to N, the adjustment pulse is generated, and reset the count value.
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| CN109994081B (en) | 2021-04-20 |
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