CN103369273A - Plasma television residual image protective method - Google Patents
Plasma television residual image protective method Download PDFInfo
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Abstract
The invention relates to the field of plasma televisions and discloses a plasma television residual image protective method, concretely comprising the steps of dividing each frame image into different areas by a display signal processing unit, comparing the corresponding areas in the current frame image with those in the last frame image, and respectively calculating the change of image data values in different areas; if the changes of the image data values in each area do not exceed the set threshold value, enabling a first counter to add 1, otherwise, storing the data value in the current frame image for being compared with the next frame image; and when the value in the first counter is larger than the threshold value set by the first counter, starting a plasma television residual image protective configuration circuit. The image is divided into different areas, and all areas are independently compared, thus enabling the judging of whether an image is static to be more accurate; and the first counter is arranged and the threshold value corresponding to the first counter is arranged, thus avoiding the interference, and the effect of a jump signal on the accuracy of the residual image protective method.
Description
Technical field
The invention belongs to the plasm TV field, relate in particular to the guard method of a kind of plasm TV image retention.
Background technology
That plasm TV adopts is plasma display panel (PDP); if same frame shows for a long time; then the fluorophor of the Cell barrier of plasma display panel is depleted; thereby cause image retention; image retention has reduced the image quality of image significantly, and therefore manufacturer and technical staff thereof exploitation both at home and abroad and utilization multiple technologies method are carried out the protection of plasm TV image retention.
Carry out the image retention protection, at first will determine to start under what conditions the image retention protection.Mode commonly used is to judge that by image signal data and the analytic signal data variation of the output of statistics front end image is static or dynamic in the prior art; if the still image certain time then starts the image retention defencive function; keep umber of pulse when reaching at preset timed intervals step-length scanning being kept pulse and is down to Quan Baichang; at the image retention guard period; if it is dynamic image that the display processing unit detects image, then withdraw from immediately the image retention protected mode.The problem that the method exists is that the sustained sound signal of (1) video channel causes the image state erroneous judgement disconnected, can not enter the image retention protection or enter rear erroneous judgement to withdraw from.(2) outside transient noise is disturbed and is caused or during the instantaneous abrupt change of picture signal own, can not enter the image retention protection or enter backed off after random.(3) every two field picture all is that integral body is carried out the computed image data value; obtain the image data value of a two field picture according to the rgb value of each pixel; thereby judge it is still image or dynamic image, such result of calculation is not accurate enough, can not judge topography and protects.(4) during the image retention protected mode, keep number of pulses when scanning is kept pulse and is down to Quan Baichang, the picture protection effect abundant for image detail can not get ensureing.(5) for the circulating rolling image, the general image signal data is unchanged, and the display processing unit is thought still image, erroneous judgement occurs.Switch when (6) withdrawing from the image retention protected mode and keep umber of pulse and cause image moment brightness to increase, visual contrast affects display effect.
Usually the image retention protected mode that adopts in the prior art is for showing predefined picture.Plasm TV input signal processing unit when no signal is inputted by showing that predefined picture prevents that image retention from producing; The normal picture pattern is carried out pixel to image and is moved to process and prevent image retention; At the user operation mode interface, no user operational order certain time shows that then predefined picture prevents that image retention from occuring.The problem that the method exists is that (1) default screen protection picture has randomness, exports low-light level screen protection signal, and is heavy to scan drive cell and energy recovery unit load; Output high brightness screen protection signal is heavy to the Data driver unit load; When carrying out the image retention protection, other performances of plasm TV have been sacrificed.(2) pixel moving method when image detail surpasses the mobile scope of pixel institute, does not have defencive function.As increase the pixel moving range, then reproduction of image rate index and subjective effect there are larger negative effect.Simultaneously, pixel will cause output signal to change after moving processing, affect the judgement that the display processing unit carries out the image retention defencive function.(3) operation interface of user operation mode is fixing for a long time, watches for a long time human eye is harmful to, and produces easily image retention.
Therefore, realize image retention protection in user's use procedure in the urgent need to a kind of image retention guard method cheap, easy to use, dependable performance, to reach the best video display effect, to improve the plasma display product purpose in useful life.
Summary of the invention
The technical problem judged by accident occurs easily for the plasm TV image retention guard method that exists in the prior art, the guard method of a kind of plasm TV image retention is provided.Method of the present invention divides GTG or piecemeal to judge by showing output signal, obtains exactly showing that output signal is still image or dynamic image, the impact of having avoided the noise in the passage that image is judged.The filtering processing is carried out in piecemeal and by stages simultaneously, has further avoided the impact of transient noise.Judge because of piecemeal simultaneously, also make it possible to find local still image and start the image retention protection.
Technical scheme of the present invention is as follows: the guard method of a kind of plasm TV image retention, it specifically may further comprise the steps: the display processing unit is divided into different zones with each two field picture, and the respective regions in current frame image and the previous frame image compared, calculate respectively the variation of image data value in the zones of different; If the variation of image data value does not all exceed the threshold value of setting in each zone, then the first counter adds 1, otherwise, the data value of current frame image is preserved for comparing with the next frame image; When threshold value that the value in the first counter is set greater than the first counter, start plasm TV image retention protection configuration circuit.By image being divided into a plurality of zones, each zone judges respectively whether the variation of image exceeds the threshold value of setting, make it possible to find the still image of subregion, and be not only that integral body is calculated, the subregion is judged simultaneously, the result who judges is more accurate, has greatly reduced the risk of erroneous judgement.Set counter and corresponding threshold value, so that the impact of external interference signals reduces.
Further, above-mentionedly each two field picture is divided into different zones is specially: the pixel in each two field picture is divided between a plurality of different gray areas, image data value between the corresponding gray area with the previous frame image of the image data value between each gray area compares, and judges whether the variation of middle image between each gray area exceeds the threshold value of setting.The gray value of each pixel gets access to easily in the image, adopts the mode that gray value is divided so that method of the present invention simply is easy to realization.
Further, above-mentionedly each two field picture is divided into different zones is specially: each two field picture is divided into a plurality of different pieces, image data value in image data value in each piece and the previous frame image relevant block compares, and judges whether the variation of image in each piece exceeds the threshold value of setting.Every two field picture is divided into different pieces, makes it possible to find the still image of subregion, be convenient to process.
Further, above-mentioned also being included in closed image retention protection configuration circuit after the startup image retention is protected configuration circuit, it is specially: set the 3rd counter and the threshold value corresponding with the 3rd counter, respective regions in current frame image and the previous frame image is compared, calculate respectively the variation of image data value in the zones of different; If there is the variation of image data value in the zone to exceed the threshold value of setting, then the 3rd counter adds 1, otherwise, continuous service image retention protection configuration circuit; When threshold value that the value of the 3rd counter is set greater than the 3rd counter, close image retention protection configuration circuit.Adopt aforesaid way and protect configuration circuit also can avoid interference so that close image retention.
Further; said method also comprises filtering; described filtering is specially sets the second counter and the threshold value corresponding with the second counter; after starting image retention protection configuration circuit; judge whether to close in the process of image retention protection configuration circuit; when judged result is that each regional image change is during all less than the threshold value set; the second counter adds 1; then judge whether the value of the second counter is greater than or equal to the threshold value of setting; be; then the value in the first counter adds the value in the second counter, otherwise whether the value of judging the 3rd counter is less than the threshold value of setting.Said method is so that disturb further reduction.
Further; said method also comprises the system parameter setting process; it adopts the system parameter setting module to set the parameter that image retention is protected to the user, and described parameter comprises the threshold value that the dividing mode in zone, regional number, each area image change, the threshold value of counter.Adopt the system parameter setting module so that the parameter in the system can manually be set as required, convenient for users to use.
Further, said method comprises that also system parameters is sent to indicative control unit shows control.The employing indicative control unit shows parameter and controls, further facilitated user's use.
Further, do not detect user's operation signal in the communication unit Preset Time if said method also comprises, the input signal processing unit starts default image and shows, transmit the state information to simultaneously image retention protection configuration circuit.Do not have the user in the situation of operation, automatically carry out the protection of plasm TV image retention, be very easy to user's use.
Further, said method also comprises when signal processing unit starts the pixel locomotive function, transmit the state information to simultaneously image retention protection configuration circuit.When carrying out other functions, in time transmit the state information to the image retention protective circuit, make things convenient for the user in time to understand the processing progress of image retention guard method inside.
Beneficial effect of the present invention is: by image being divided into a plurality of zones, each zone judges respectively whether the variation of image exceeds the threshold value of setting, make it possible to find the still image of subregion, and be not only that integral body is calculated, the subregion is judged simultaneously, the result who judges is more accurate, has greatly reduced the risk of erroneous judgement.Set counter and corresponding threshold value, so that the impact of external interference signals reduces.
Description of drawings
Fig. 1 is the plasm TV system functional block diagram.
Fig. 2 is image retention guard method system functional block diagram.
Fig. 3 is the setting of GTG signal statistics circuit parameter.
Fig. 4 is GTG signal statistics circuit working flow process.
Fig. 5 is GTG signal statistics filter circuit workflow.
Fig. 6 is the setting of block signal statistical circuit parameter.
Fig. 7 is block signal statistical circuit workflow.
Fig. 8 is block signal statistical filtering circuit working flow process.
Embodiment
Below in conjunction with Figure of description embodiments of the present invention are specified.
Describe for unified, " image data value " among the present invention is the set with the gray value of each pixel (pixel) of numeric representation that the rgb value of each pixel forms.
Plasm TV system functional block diagram as shown in Figure 1.The outside source output signal is to the input unit of plasm TV signal, through passing the signal to the input signal processing unit after the processing such as impedance matching, signal filtering, analog-to-digital conversion.The input signal processing unit is sent to the display output unit after image quality is processed.The display output unit becomes the signal of LVDS or extended formatting to be sent to the display processing unit Signal coding.The display processing unit is decoded, is sent to indicative control unit after the processing such as image quality aftertreatment front end signal.Indicative control unit is changed signal format, produces the Drive of row and column signal and is sent to respectively scan drive cell, Data driver unit.Scan drive cell, Data driver unit amplify to process and drive to display control signal and show that luminescence unit shows.Communication unit receives the external user operation signal, and connects PDP circuit each processing unit, coordinates each several part and works in order.
The system of whole plasm TV comprises: signal input unit, input signal processing unit, demonstration output unit, display processing unit, communication unit, indicative control unit, scan drive cell, Data driver unit, demonstration luminescence unit etc.
Signal input unit is used for receiving the signal from the outer video signal source, and signal is carried out being sent to the input signal processing unit after filtering processing and the analog-to-digital conversion.
The input signal processing unit is used for receiving the data image signal from signal input unit, and carries out exporting the demonstration output unit to after image quality is processed; Be used for receiving the operational order of communication unit, and carry out picture signal according to order and process.
Show output unit, be used for receiving the data from the input signal processing unit, and data transformation is become to meet signal format and the driver output that demonstration needs transmit in the suitable machine simultaneously.
The display processing unit, be used for receiving front-end show the data of output unit and decode, image processes; Be used for receiving the operational order of communication unit, and carry out signal according to order and process.
Communication unit is used for connecting each processing unit in the complete machine, according to the pre-set programs co-ordination; Be used for receiving user operation commands and being sent to the respective handling unit.
Indicative control unit is used for receiving the signal of display processing unit, and signal is converted to the Drive of row and column signal of plasma demonstration needs.
Scan drive cell, the signal for receiving indicative control unit carries out turntable driving.
The Data driver unit, the signal for receiving indicative control unit carries out turntable driving.
Show luminescence unit, show according to the signal sequence of scan drive cell, Data driver unit.
Wherein the display processing unit comprises: image signal decoding unit, GTG signal statistics circuit, GTG signal statistics filter circuit, GTG signal judging circuit, block signal statistical circuit, block signal statistical filtering circuit, block signal decision circuitry, image retention protection configuration circuit, other signal processing parts grade.
The image signal decoding unit is used for receiving the signal that shows output unit, converts thereof into real-time parallel data, is used for follow-up each processing unit and carries out the data processing.
GTG signal statistics circuit is used for image signal data is divided between four gray areas, and carries out respectively quantity statistics.
GTG signal statistics filter circuit is used for disturbing threshold values and average interference threshold values that the GTG statistics is carried out filtering according to default spike, reduces the data erroneous judgement.
The GTG signal judging circuit is used for analyzing the GTG signal intensity, judges that image is still image or live image, and status flag information is sent to image retention protection configuration circuit.
The block signal statistical circuit is used for image signal data is divided into four zones, and carries out respectively the picture level statistics.
Block signal statistical filtering circuit is used for disturbing threshold values and average interference threshold values that the block signal statistics is carried out filtering according to default spike, reduces the data erroneous judgement.
The block signal decision circuitry is used for the analysis block signal intensity, judges that image is still image or live image, and status flag information is sent to image retention protection configuration circuit.
Image retention protection configuration circuit, the signal for receiving the departments such as GTG signal judging circuit, fast signal decision circuitry, communication unit judges whether to enter the image retention protected mode, will order the transmission indicative control unit to be carried out.
Other signal processings, the plasm TV image shows the routine that needs.
Image retention protection among the present invention mainly realizes by the display processing unit.
One of them embodiment
The display processing unit comprises image signal decoding unit, GTG signal statistics circuit, GTG signal statistics filter circuit, GTG signal judging circuit, block signal statistical circuit, block signal statistical filtering circuit, block signal decision circuitry, image retention protection configuration circuit.
Decode to the picture signal of input in the image signal decoding unit, obtain the GTG of each each pixel of two field picture, whole pixel gray level is divided into the segment of 4 or 8 or Set arbitrarily, take 4 segments as example, the GTG of supposing whole pixel is the N rank, and then the GTG in 4 segments is respectively 1 to N/4; (N/4+1) to N/2; N/2+1 to 3/4N; 3/4N+1 is to N.Add up respectively the quantity of each frame image data GTG in each segment, and judge whether needs unlatching image retention protection configuration circuit according to the variation of front and back two field picture image data value in each GTG interval.
The step of the number change of statistical picture between each gray area is as follows: carry out the parameter setting according to the program storage parameter configuration, it is interval for being set as 4 image gray-scale level intervals in the 4(present embodiment that the image gray-scale level level is set, the quantity in its GTG interval can be adjusted as required, can be 8,16, equivalence).N1 (0) is the quantity of 1 to N/4 pixel for GTG under the initial condition, N2 (0) is that GTG is (N/4+1) quantity to the pixel of N/2 under the initial condition, N3 (0) is the quantity of the pixel of N/2+1 to 3/4N for GTG under the initial condition, and N4 (0) is that 3/4N+1 is to the quantity of the pixel of N for GTG under the initial condition.By that analogy, N1 (1), N2 (1), N3 (1), N4 (1) is the quantity of the pixel of each gray-scale areas of current frame image.
The image data value in the different GTGs of start frame image interval is set, N1 (0)=N2 (0)=N3 (0)=N4 (0)=0.View data is set changes threshold values F1, F2, F3, F4.Wherein each interval change threshold can be identical, also can be different, and F1, F2, F3, F4 represent respectively the change threshold of the image data value between each gray area in the 4 gray scales interval.It is less that view data changes threshold values, and then the guard method of TV image retention is sensitiveer.Grey exponent counter threshold values K1 is set, K2, K3.Whether K1 is for starting the threshold value that image retention is protected configuration circuit, and K3 is the threshold value of whether closing image retention protection configuration circuit.Two threshold values of K1 and K3 are set have avoided behind the result who once is judged as static data or dynamic data, just beginning starting or closed image retention protection configuration circuit, avoided the signal of passage to disturb.K2 in like manner is set is in order to be in order to carry out k1=k1+k2 behind the static data that is obtaining the regular hour in judgement again, k1 continues counting, has further avoided having carried out filtering, the inevitable impact of signal instantaneous variation.Counter k1 is set, k2, k3=0; K1 and k3 represent respectively the duration of static data and dynamic data, the duration of k2 representative static data after opening TV image retention protection configuration circuit.The image data value of the different GTGs of statistics current frame image is made as N1 (1), N2 (1), N3 (1), N4 (1).
GTG signal statistics circuit working flow process.Read different GTG N1 (1) N2 (1) N3 (1) N4 (1) of current frame image.Judge | N1 (1)-N1 (0) |＜=F1, | N2 (1)-N2 (0) |＜=F2, | N3 (1)-N3 (0) |＜=F3, | N4 (1)-N4 (0) |＜=F4; Any one does not satisfy, then with the different GTG assignment of present image to initial value, be N1 (0)=N1 (1), N2 (0)=N2 (1), N3 (0)=N3 (1), N4 (0)=N4 (1), k1=k2=k3=0 again reads N1 (1) N2 (1) N3 (1) N4 (1) and carries out data relatively; When all satisfy, k1=k1+1 then.Image is divided between 4 gray areas, image data value between each gray area changes all less than the threshold value of setting, | N1 (1)-N1 (0) |＜=F1, | N2 (1)-N2 (0) |＜=F2, | N3 (1)-N3 (0) |＜=F3, | during N4 (1)-N4 (0) |＜=F4, be judged as still image one time, k1+1.When the number of times of still image appearance is greater than or equal to the threshold k 1 of setting, the image retention protected mode is set opens a P1, k1 stops counting.Otherwise continue to read N1 (1) N2 (1) N3 (1) N4 (1), proceed comparison, until k1 〉=K1 starts image retention configuration protection circuit.
GTG signal statistics filter circuit workflow.Judge k3＜K3; Otherwise close the image retention protected mode and open a P1, the again reading out data work of GTG signal statistics circuit; Then to read N1 (1) N2 (1) N3 (1) N4 (1).Judge | N1 (1)-N1 (0) |＜=F1, | N2 (1)-N2 (0) |＜=F2, | N3 (1)-N3 (0) |＜=F3, | N4 (1)-N4 (0) |＜=F4; Otherwise k3=k3+1; K2=k2+1 then.Judge k2＜=K2; Otherwise turn back to the initial k3 of rejudging＜K3; Be k1=k1+k2 then, k1 continues counting.
Embodiment two
Block signal statistical circuit parameter arranges.Carry out the parameter setting according to the program storage parameter configuration, it is 4 that the image block areas interval is set; Data value between start frame image different masses area region is set, establishes M1 (0)=M2 (0)=M3 (0)=M4 (0)=0; View data is set changes threshold values E1, E2, E3, E4; Grey exponent counter threshold values J1 is set, J2, J3; Counter j1 is set, j2, j3=0; The image data value of the different gray scale levels of statistics current frame image is made as M1 (1), M2 (1), M3 (1), M4 (1).
Block signal statistical circuit workflow.Read M1 (1) M2 (1) M3 (1) M4 (1).Judge | M1 (1)-M1 (0) |＜=E1, | M2 (1)-M2 (0) |＜=E2, | M3 (1)-M3 (0) |＜=E3, | M4 (1)-M4 (0) |＜=E4; Any one does not satisfy, M1 (0)=M1 (1), M2 (0)=M2 (1), M3 (0)=M3 (1), M4 (0)=M4 (1) then, j1=j2=j3=0 again reads M1 (1) M2 (1) M3 (1) M4 (1) and carries out data relatively; When all satisfy, j1=j1+1 then.Judge j1 〉=J1; Otherwise continue to read M1 (1) M2 (1) M3 (1) M4 (1), proceed comparison; Be the image retention protected mode then to be set open a Q1, j1 stops counting.
Block signal statistical filtering circuit working flow process.Judge j3＜J3; Otherwise close the image retention protected mode and open shop Q1, the again reading out data work of block signal statistical circuit; Then to read M1 (1) M2 (1) M3 (1) M4 (1).Judge | M1 (1)-M1 (0) |＜=E1, | M2 (1)-M2 (0) |＜=E2, | M3 (1)-M3 (0) |＜=E3, | M4 (1)-M4 (0) |＜=E4; Otherwise j3=j3+1; J2=j2+1 then.Judge j2＜=J2; Otherwise turn back to the initial j3 of rejudging＜J3; Be j1=j1+j2 then, j1 continues counting.
GTG signal judging circuit, block signal decision circuitry are dealt into image retention protection configuration circuit with state information, and image retention protection configuration circuit is sent to indicative control unit with corresponding configuration parameter and shows control.
The main flow image model is set to standard, soft, beautiful, user definition etc., after communication unit receives the operational order of user to the TV display mode, transfers commands to image retention protection configuration circuit.Image retention protection configuration circuit is sent to indicative control unit with corresponding configuration parameter and shows control.
The user interface of plasm TV, if do not detect user's operation signal in the communication unit Preset Time, the input signal processing unit starts default image and shows, transmit the state information to simultaneously image retention protection configuration circuit.Image retention protection configuration circuit is sent to indicative control unit with corresponding configuration parameter and shows control.
Plasm TV complete machine non-signal screen protection function if do not detect the vision signal input in the input signal processing unit Preset Time, then starts default image and shows, transmit the state information to simultaneously image retention protection configuration circuit.Image retention protection configuration circuit is sent to indicative control unit with corresponding configuration parameter and shows control.
The image retention that plasma electric is considered as alleviating fixed area in the live image produces, and has designed the pixel locomotive function, allows the Regional Dispersion that may produce image retention to certain area.When the input signal processing unit starts the pixel locomotive function, transmit the state information to simultaneously image retention protection configuration circuit.Image retention protection configuration circuit is sent to indicative control unit with corresponding configuration parameter and shows control.
Here by specific embodiment the present invention is described in detail, provide the description of above-described embodiment for those skilled in the art being made or being suitable for the present invention, the various modifications of these embodiment are that appearance is intelligible for a person skilled in the art.The present invention is not limited to these examples, or some aspect wherein.Scope of the present invention is elaborated by additional claim.
Above-mentioned explanation illustrates and has described a preferred embodiment of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection range of claims of the present invention.
Claims (9)
1. plasm TV image retention guard method, it specifically may further comprise the steps: the display processing unit is divided into different zones with each two field picture, and the respective regions in current frame image and the previous frame image compared, calculate respectively the variation of image data value in the zones of different; If the variation of image data value does not all exceed the threshold value of setting in each zone, then the first counter adds 1, otherwise, the data value of current frame image is preserved for comparing with the next frame image; When threshold value that the value in the first counter is set greater than the first counter, start plasm TV image retention protection configuration circuit.
2. plasm TV image retention as claimed in claim 1 guard method; it is characterized in that describedly each two field picture is divided into different zones is specially: the pixel in each two field picture is divided between a plurality of different gray areas; image data value between the corresponding gray area with the previous frame image of the image data value between each gray area compares, and judges whether the variation of middle image between each gray area exceeds the threshold value of setting.
3. plasm TV image retention as claimed in claim 1 guard method; it is characterized in that describedly each two field picture is divided into different zones is specially: each two field picture is divided into a plurality of different pieces; image data value in image data value in each piece and the previous frame image relevant block compares, and judges whether the variation of image in each piece exceeds the threshold value of setting.
4. such as claim 2 or 3 described plasm TV image retention guard methods, it is characterized in that closing image retention protection configuration circuit after described method also is included in startup image retention protection configuration circuit, it is specially: set the 3rd counter and the threshold value corresponding with the 3rd counter, respective regions in current frame image and the previous frame image is compared, calculate respectively the variation of image data value in the zones of different; If there is the variation of image data value in the zone to exceed the threshold value of setting, then the 3rd counter adds 1, otherwise, continuous service image retention protection configuration circuit; When threshold value that the value of the 3rd counter is set greater than the 3rd counter, close image retention protection configuration circuit.
5. plasm TV image retention as claimed in claim 4 guard method; it is characterized in that described method also comprises filtering; described filtering is specially sets the second counter and the threshold value corresponding with the second counter; after starting image retention protection configuration circuit; judge whether to close in the process of image retention protection configuration circuit; when judged result is that each regional image change is during all less than the threshold value set; the second counter adds 1; then judge whether the value of the second counter is greater than or equal to the threshold value of setting; be; then the value in the first counter adds the value in the second counter, otherwise whether the value of judging the 3rd counter is less than the threshold value of setting.
6. plasm TV image retention as claimed in claim 5 guard method; it is characterized in that described method also comprises the system parameter setting process; it adopts the system parameter setting module to set the parameter of image retention protection to the user; described parameter comprises the threshold value that the dividing mode in zone, regional number, each area image change, the threshold value of counter.
7. plasm TV image retention as claimed in claim 6 guard method is characterized in that described method comprises that also system parameters is sent to indicative control unit shows control.
8. plasm TV image retention as claimed in claim 7 guard method; also comprise the interior user's operation signal that do not detect of communication unit Preset Time if it is characterized in that described method; the input signal processing unit starts default image and shows, transmit the state information to simultaneously image retention protection configuration circuit.
9. plasm TV image retention as claimed in claim 8 guard method is characterized in that described method also comprises when signal processing unit starts the pixel locomotive function, transmit the state information to simultaneously image retention protection configuration circuit.
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| CN107749983A (en) * | 2017-11-03 | 2018-03-02 | 四川长虹电器股份有限公司 | A kind of OLED video screen guard methods based on image recognition |
| CN111341236A (en) * | 2019-05-03 | 2020-06-26 | 友达光电股份有限公司 | Display device |
| CN111432257A (en) * | 2020-03-26 | 2020-07-17 | 海信视像科技股份有限公司 | Method for starting screen protection of display equipment and display equipment |
| CN112992096A (en) * | 2021-03-19 | 2021-06-18 | 合肥京东方显示技术有限公司 | Method and device for improving afterimage and display device |
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| CN101071543A (en) * | 2006-05-12 | 2007-11-14 | 群康科技(深圳)有限公司 | Liquid crystal panel driving device and its driving method |
| CN101183518A (en) * | 2006-11-13 | 2008-05-21 | 三星电子株式会社 | Image display device and method thereof |
| CN101355649A (en) * | 2008-09-11 | 2009-01-28 | 松翰科技股份有限公司 | Method for processing denoising image and apparatus thereof |
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