CN106875883B - Method and system for controlling display of display panel - Google Patents
Method and system for controlling display of display panel Download PDFInfo
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- CN106875883B CN106875883B CN201611232967.8A CN201611232967A CN106875883B CN 106875883 B CN106875883 B CN 106875883B CN 201611232967 A CN201611232967 A CN 201611232967A CN 106875883 B CN106875883 B CN 106875883B
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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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a method and a system for controlling display of a display panel. The method comprises the following steps: detecting the voltage of a pixel point of a display panel; judging whether the working strength of the pixel point exceeds the standard or not according to the voltage; if the pixel point exceeds the standard, the driving frequency of the pixel point is reduced. Through this kind of mode, can in time adjust the working strength of this pixel, reduce the time that this pixel is in the high load state to can slow down display panel's luminance decay, and then improve display panel's the incomplete shadow of demonstration, improve display panel's life.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method and a system for controlling display of a display panel.
Background
Whether an AMOLED (Active Matrix/Organic Light Emitting Diode) display panel or a conventional liquid crystal display panel, the luminance of the electro-optical material or the Light Emitting device inside the display panel may be attenuated with time, and the attenuation may be accelerated with the enhancement of the luminance. The brightness attenuation is unrecoverable, and can cause the display panel to display afterimages, thereby affecting the display effect of the display panel and shortening the service life of the display panel.
Disclosure of Invention
The invention mainly solves the technical problem of providing a method and a system for controlling the display of a display panel so as to improve the display ghost of the display panel and prolong the service life of the display panel.
In order to solve the technical problem, the invention provides a method for controlling display of a display panel, which comprises the steps of detecting the voltage of a pixel point of the display panel;
judging whether the working strength of the pixel points exceeds the standard or not according to the voltage;
and if the pixel point exceeds the standard, reducing the driving frequency of the pixel point.
Wherein, the step of judging whether the working strength of the pixel point exceeds the standard according to the voltage further comprises the following steps: judging whether the voltage for driving the pixel point each time is greater than a first threshold value; if the voltage is greater than the first threshold, the value of the counter is increased by one; judging whether the value of the counter exceeds a second threshold value; and if the working intensity of the pixel point exceeds the second threshold, judging that the working intensity of the pixel point exceeds the standard.
Wherein if the voltage is not greater than the first threshold, the value of the counter is decremented by one.
Wherein the reducing the driving frequency of the pixel point comprises: setting the voltage applied to the pixel point to zero or to remain unchanged.
Wherein the reducing the driving frequency of the pixel point comprises: and searching a voltage compensation value corresponding to the value of the counter exceeding the second threshold value in a correlation table of the value of the counter and the voltage compensation value so as to compensate the voltage applied to the pixel point.
Wherein the method further comprises: judging whether the value of the counter continuously exceeds a third threshold value for more than a preset time or not; and if the third threshold value is continuously exceeded for more than the preset time, the power supply of the display panel is cut off.
In order to solve the above technical problem, the present invention further provides a system for controlling display of a display panel, the system comprising: the detection circuit, the control circuit and the drive circuit;
the detection circuit, the control circuit and the drive circuit are connected in sequence;
the detection circuit is used for detecting the voltage of the pixel point of the display panel;
the control circuit is used for judging whether the working strength of the pixel points exceeds the standard or not according to the voltage; and if the working strength of the pixel point exceeds the standard, informing the driving circuit to reduce the driving frequency of the pixel point.
Wherein the system further comprises: a counter; the counter is connected with the control circuit; the control circuit is used for judging whether the voltage for driving the pixel point each time is larger than a first threshold value; if yes, generating a first signal to the counter; if not, generating a second signal to the counter; the counter is used for adding one to a value according to the first signal or subtracting one from the value according to the second signal; the control circuit further determines whether the value of the counter exceeds a second threshold; and if the working intensity of the pixel point exceeds the second threshold, judging that the working intensity of the pixel point exceeds the standard, and informing the driving circuit to reduce the driving frequency of the pixel point.
The driving circuit further comprises a setting sub-circuit or comprises a searching sub-circuit and a compensating sub-circuit; the setting sub-circuit is connected with the control circuit, or the searching sub-circuit is respectively connected with the control circuit and the compensation sub-circuit; the setting sub-circuit is used for setting the voltage applied to the pixel point to be zero or keeping the voltage unchanged; the searching sub-circuit is used for searching a voltage compensation value corresponding to the value of the counter exceeding the second threshold value in a correlation table of the value of the counter and the voltage compensation value; the compensation subcircuit is used for compensating the voltage applied to the pixel point according to the compensation value.
The control circuit is also connected with a power supply circuit of the display panel; the counter is used for judging whether the value of the counter continuously exceeds a third threshold value for more than a preset time or not; and if the third threshold value is continuously exceeded for more than the preset time, generating an abnormal signal to a power supply circuit of the display panel so as to cut off the power supply of the power supply circuit.
The invention has the beneficial effects that: the method and the system for controlling the display of the display panel judge whether the working strength of the pixel point exceeds the standard or not through the detected voltage of the pixel point of the display panel, and reduce the driving frequency of the pixel point if the working strength of the pixel point exceeds the standard.
Drawings
FIG. 1 is a flowchart illustrating a method for controlling a display of a display panel according to a first embodiment of the present invention;
FIG. 2 is a circuit diagram of one embodiment of a pixel circuit of the display panel of the embodiment of FIG. 1;
FIG. 3 is a flowchart illustrating a second embodiment of a method for controlling a display of a display panel according to the present invention;
FIG. 4 is a flowchart illustrating a third embodiment of a method for controlling a display of a display panel according to the present invention;
FIG. 5 is a schematic diagram of a first embodiment of a system for controlling a display of a display panel according to the present invention;
FIG. 6 is a schematic diagram of a second embodiment of a system for controlling a display of a display panel according to the present invention;
FIG. 7 is a schematic diagram illustrating a third embodiment of a system for controlling a display of a display panel according to the present invention;
FIG. 8 is a diagram illustrating a fourth embodiment of a system for controlling a display of a display panel according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a method for controlling display of a display panel according to a first embodiment of the present invention. The embodiment comprises the following steps:
step S101: and detecting the voltage of the pixel point of the display panel.
Referring to fig. 2, fig. 2 is a circuit diagram of an embodiment of a pixel circuit of the display panel shown in fig. 1. The pixel is operated by a light emitting device 201 under the control of two Thin Film Transistors (TFTs) 202, 203, wherein a scan line 205 controls the TFT 202 to be turned on or off and a data line 204 supplies a pixel display voltage. Generally, one TFT 202 is connected to a plurality of TFTs 203 (each TFT 203 corresponds to one sub-pixel), each TFT 203 corresponds to one light emitting device 201, and the display voltage provided by the data line 204 is divided by the TFTs 203 after passing through the TFT 202 to control the plurality of light emitting devices 201 to emit light (corresponding to the plurality of sub-pixels). In one application scenario, the working intensity of the pixel may be detected by detecting the pixel display voltage provided by the data line 204. In other application scenarios, the display voltage provided by the data line 204 to each sub-pixel may be detected to detect the working strength of each sub-pixel.
In another application scenario, the light emitting device 201 may be a light emitting diode, LED, etc. made of an organic light emitting material, of course, different types of display panels have different types of light emitting devices 201.
Step S102: and judging whether the working strength of the pixel points exceeds the standard or not according to the voltage. If the result exceeds the standard, the process proceeds to step S103.
Optionally, referring to fig. 3, the step S102 further includes the following steps:
step S301: determining whether the voltage driving the pixel point is greater than a first threshold, if so, performing step S302, and if not, performing step S303.
In one application scenario, the magnitude of the first threshold depends mainly on the maximum voltage rating of the light emitting device 201 in the above circuit. The pixel point is composed of three sub-pixels, each sub-pixel corresponds to a Light Emitting Device (LED) lamp, and if the maximum rated working voltage of the LED lamp is 6V, the first threshold value is 6V (three LED lamps are connected in parallel). Of course, the first threshold should not exceed the maximum voltage ratings of the TFTs 202 and 203.
Step S302: the value of the counter is incremented by one.
In one application scenario, the value of the counter is incremented by one, i.e., the value of the register inside the counter is incremented by one.
Step S303: the value of the counter is decremented by one.
In one application scenario, the value of the counter is decreased by one, i.e., the value of the register inside the counter is decreased by one.
Step S304: and judging whether the value of the counter exceeds a second threshold value, if so, judging that the working strength of the pixel point exceeds the standard, and entering the following step S103.
From the above analysis, when the voltage driving the pixel point changes differently from the first threshold, the value of the counter changes, and the value of the counter reflects the magnitude of the working strength of the pixel point, but cannot directly reflect whether the working strength exceeds the standard, so that a second threshold needs to be set to determine whether the working strength of the pixel point exceeds the standard. The second threshold value can be determined according to the working environment of the display panel, peripheral equipment, technical parameter requirements and the like.
S103: and reducing the driving frequency of the pixel points.
Alternatively, the present embodiment may set the voltage applied to the pixel point to zero or keep the voltage unchanged. Specifically, the voltage of the pixel point can be selectively set to be zero, that is, when the working strength of the pixel point of the current frame exceeds the standard, the voltage of the pixel point is set to be zero. By the method, the time of the pixel points working in the state of exceeding the standard intensity can be reduced to a certain degree, and meanwhile, as long as the display picture keeps a certain refreshing rate, human eyes cannot perceive the change of the picture quality, so that the display quality of the picture cannot be reduced by the method.
Optionally, in this embodiment, the voltage compensation value corresponding to the value of the counter exceeding the second threshold may be searched in the table associating the value of the counter and the voltage compensation value, so as to compensate the voltage applied to the pixel. In one application scenario, the larger the value of the counter, the larger the corresponding voltage compensation value. In another application scenario, the voltage compensation value is a positive number. The positive and negative of the voltage compensation value are related to the voltage compensation mode.
Be different from prior art, this embodiment judges whether this pixel point working strength exceeds standard through the voltage of the display panel pixel point that detects, if this pixel point working strength exceeds standard, then reduces the drive frequency of this pixel point, through this kind of mode, can in time adjust the working strength of this pixel point, reduces the time that this pixel point is in the high load state to can slow down display panel's luminance decay, and then can improve display panel's the incomplete shadow of demonstration, improve display panel's life.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a method for controlling display of a display panel according to a third embodiment of the present invention. In this embodiment, a voltage abnormality determining step is added on the basis of the embodiment in fig. 3, and the step further includes:
step S401: judging whether the value of the counter continuously exceeds a third threshold value for more than a preset time, if so, performing step S402; if not, the above step S304 is performed to determine whether the value of the counter exceeds the second threshold.
Step S402: the power supply of the display panel is cut off.
If the value of the counter continuously exceeds the third threshold value and exceeds the preset time, the power supply of the display panel is cut off in time, and the whole display panel and the peripheral equipment connected with the display panel are prevented from being damaged.
Different from the prior art, the damage of the display panel can be reduced by newly adding the voltage abnormity judgment.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a system for controlling display of a display panel according to a first embodiment of the present invention. The embodiment comprises the following steps: a detection circuit 501, a control circuit 502, and a drive circuit 503. The detection circuit 501, the control circuit 502, and the drive circuit 503 are connected in this order.
The detection circuit 501 is used for detecting the voltage of the pixel point of the display panel; the control circuit 502 is used for judging whether the working strength of the pixel point exceeds the standard or not according to the voltage; if the working strength of the pixel exceeds the standard, the driving circuit 503 is notified to reduce the driving frequency of the pixel.
Different from the prior art, in the embodiment, the voltage of the pixel point of the display panel is detected by the detection circuit 501, and whether the working strength of the pixel point exceeds the standard is judged by the control circuit 502 according to the voltage; if the working strength of the pixel exceeds the standard, the driving circuit 503 is notified to reduce the driving frequency of the pixel. Through this kind of mode, can in time adjust the working strength of this pixel, reduce the time that this pixel is in the high load state to can slow down display panel's luminance decay, and then can improve display panel's the incomplete shadow of demonstration, improve display panel's life.
Optionally, referring to fig. 6, fig. 6 is a schematic structural diagram of a second embodiment of a system for controlling display of a display panel according to the present invention, where the embodiment further includes, on the basis of the embodiment in fig. 5: a counter 601; the counter 601 is connected to the control circuit 502.
In this embodiment, the control circuit 502 is further configured to determine whether the voltage for driving the pixel point each time is greater than a first threshold; if yes, a first signal is generated to the counter 601; if not, generating a second signal to the counter 601; the counter 601 is used for adding one to the value thereof according to the first signal or subtracting one from the value thereof according to the second signal; the control circuit 502 is further configured to determine whether the value of the counter 601 exceeds a second threshold; if the second threshold is exceeded, it is determined that the working strength of the pixel exceeds the standard, and the driving circuit 503 is notified to reduce the driving frequency of the pixel.
Optionally, the driving circuit 503 of this embodiment further includes: a setup sub-circuit 602; the setting sub-circuit 602 is connected to the control circuit 502. The setting sub-circuit 602 is used to set the voltage applied to the pixel to zero or remain unchanged. The specific arrangement is already stated in the above method embodiment, and the description is not repeated here.
Optionally, referring to fig. 7, the driving circuit 503 of the present embodiment further includes: a lookup sub-circuit 701 and a compensation sub-circuit 702; the search sub-circuit 701 is connected to the control circuit 503 and the compensation sub-circuit 702, respectively.
The lookup sub-circuit 701 looks up a voltage compensation value corresponding to the value of the counter exceeding the second threshold value in the correlation table of the value of the counter 601 and the voltage compensation value; the compensation sub-circuit 702 is used for compensating the voltage applied to the pixel according to the compensation value. The specific compensation method has already been stated in the above method embodiments, and will not be repeated here.
Alternatively, referring to fig. 8, fig. 8 is a schematic structural diagram of a system for controlling display of a display panel according to a fourth embodiment of the present invention. In this embodiment, the control circuit 502 is further connected to the power supply circuit 801 of the display panel, and is configured to determine whether the value of the counter 601 continuously exceeds the third threshold for more than a predetermined time; if the third threshold value is continuously exceeded for more than the predetermined time, an abnormal signal is generated to the power supply circuit 801 of the display panel to disconnect the power supply of the power supply circuit 801.
Different from the prior art, the damage of the display slow plate can be reduced by adding the voltage abnormity judging circuit.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method for controlling a display of a display panel, comprising:
detecting the voltage of a pixel point of a display panel;
judging whether the working strength of the pixel points exceeds the standard or not according to the voltage, and reducing the time of the pixel points in a high-load state, so that the brightness attenuation of the display panel can be reduced;
if the pixel point exceeds the standard, reducing the driving frequency of the pixel point;
the step of judging whether the working strength of the pixel point exceeds the standard according to the voltage further comprises the following steps:
judging whether the voltage for driving the pixel point each time is greater than a first threshold value;
if the voltage is greater than the first threshold, the value of the counter is increased by one;
if the voltage is not greater than the first threshold, then the value of the counter is decremented by one;
judging whether the value of the counter exceeds a second threshold value;
and if the working intensity of the pixel point exceeds the second threshold, judging that the working intensity of the pixel point exceeds the standard.
2. The method according to any one of claim 1, comprising:
the reducing the driving frequency of the pixel point comprises:
setting the voltage applied to the pixel point to zero or to remain unchanged.
3. The method of claim 1, comprising:
the reducing the driving frequency of the pixel point comprises:
and searching a voltage compensation value corresponding to the value of the counter exceeding the second threshold value in a correlation table of the value of the counter and the voltage compensation value so as to compensate the voltage applied to the pixel point.
4. The method of claim 1,
further comprising: judging whether the value of the counter continuously exceeds a third threshold value for more than a preset time or not;
and if the third threshold value is continuously exceeded for more than the preset time, the power supply of the display panel is cut off.
5. A system for controlling a display of a display panel, comprising:
the detection circuit, the control circuit and the drive circuit;
the detection circuit, the control circuit and the drive circuit are connected in sequence;
the detection circuit is used for detecting the voltage of the pixel point of the display panel;
the control circuit is used for judging whether the working strength of the pixel points exceeds the standard or not according to the voltage; if the working strength of the pixel point exceeds the standard, the driving circuit is informed to reduce the driving frequency of the pixel point, and the time of the pixel point in a high load state is reduced, so that the brightness attenuation of the display panel can be reduced;
in the step that the control circuit is used for judging whether the working strength of the pixel point exceeds the standard according to the voltage, the control circuit is further used for:
judging whether the voltage for driving the pixel point each time is greater than a first threshold value;
if the voltage is greater than the first threshold, the value of the counter is increased by one;
if the voltage is not greater than the first threshold, then the value of the counter is decremented by one;
judging whether the value of the counter exceeds a second threshold value;
and if the working intensity of the pixel point exceeds the second threshold, judging that the working intensity of the pixel point exceeds the standard.
6. The system of claim 5,
further comprising: a counter;
the counter is connected with the control circuit;
the control circuit is used for judging whether the voltage for driving the pixel point each time is larger than a first threshold value; if yes, generating a first signal to the counter; if not, generating a second signal to the counter;
the counter is used for adding one to a value according to the first signal or subtracting one from the value according to the second signal;
the control circuit further determines whether the value of the counter exceeds a second threshold; and if the working intensity of the pixel point exceeds the second threshold, judging that the working intensity of the pixel point exceeds the standard, and informing the driving circuit to reduce the driving frequency of the pixel point.
7. The system of claim 5,
the driving circuit further comprises a setting sub-circuit or comprises a searching sub-circuit and a compensating sub-circuit; the setting sub-circuit is connected with the control circuit, or the searching sub-circuit is respectively connected with the control circuit and the compensation sub-circuit;
the setting sub-circuit is used for setting the voltage applied to the pixel point to be zero or keeping the voltage unchanged;
the searching sub-circuit is used for searching a voltage compensation value corresponding to the value of the counter exceeding the second threshold value in a correlation table of the value of the counter and the voltage compensation value;
the compensation subcircuit is used for compensating the voltage applied to the pixel point according to the compensation value.
8. The system of claim 6,
the control circuit is also connected with a power supply circuit of the display panel and used for judging whether the value of the counter continuously exceeds a third threshold value for a preset time or not; and if the third threshold value is continuously exceeded for more than the preset time, generating an abnormal signal to a power supply circuit of the display panel so as to cut off the power supply of the power supply circuit.
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| CN107292294B (en) * | 2017-07-28 | 2020-07-03 | 京东方科技集团股份有限公司 | Display method of display module and display method of display device |
| CN107507574B (en) * | 2017-08-31 | 2019-09-20 | 京东方科技集团股份有限公司 | OLED display panel and its compensation method and device, display device |
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| US20060061292A1 (en) * | 2004-09-17 | 2006-03-23 | Samsung Electronics Co., Ltd. | Display device and driving method thereof |
| JP5330232B2 (en) * | 2007-04-27 | 2013-10-30 | エルジー ディスプレイ カンパニー リミテッド | Image display device and driving method thereof |
| KR20080097554A (en) * | 2007-05-02 | 2008-11-06 | 삼성전자주식회사 | Method for tuning flicker, tuning circuit for performing the same and display device having the tuning circuit |
| CN103065591A (en) * | 2012-09-17 | 2013-04-24 | 友达光电股份有限公司 | Dynamic switching method of liquid craystal display panel drive modes |
| KR102013701B1 (en) * | 2012-12-11 | 2019-08-26 | 엘지디스플레이 주식회사 | Organic Light Emitting Display Device and Method for Operating The Same |
| CN103281084B (en) * | 2013-04-25 | 2016-12-28 | 清华大学 | Analog-digital converter |
| CN103943077B (en) * | 2013-12-03 | 2017-01-04 | 厦门天马微电子有限公司 | The control method of a kind of display device driving voltage and display device |
| CN103681772B (en) * | 2013-12-27 | 2018-09-11 | 京东方科技集团股份有限公司 | A kind of array substrate and display device |
| CN104992676B (en) * | 2015-08-04 | 2017-11-17 | 京东方科技集团股份有限公司 | Driving voltage control method and device, array base palte, display device |
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Effective date of registration: 20220110 Address after: 523000 building 3, No. 6, HongMian Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee after: Weike terminal technology (Dongguan) Co.,Ltd. Address before: 518053 H3 501B, east industrial area of overseas Chinese town, Nanshan District, Shenzhen, Guangdong Patentee before: SHENZHEN TINNO WIRELESS TECHNOLOGY Co.,Ltd. |
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