CN106157919B - A kind of display methods and device of liquid crystal display panel - Google Patents
A kind of display methods and device of liquid crystal display panel Download PDFInfo
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- CN106157919B CN106157919B CN201610815750.3A CN201610815750A CN106157919B CN 106157919 B CN106157919 B CN 106157919B CN 201610815750 A CN201610815750 A CN 201610815750A CN 106157919 B CN106157919 B CN 106157919B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003068 static effect Effects 0.000 claims description 77
- 206010047571 Visual impairment Diseases 0.000 claims description 33
- 241001270131 Agaricus moelleri Species 0.000 claims description 28
- 238000012545 processing Methods 0.000 claims description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 3
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- 238000006243 chemical reaction Methods 0.000 abstract 1
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- 238000003702 image correction Methods 0.000 description 5
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- 239000011521 glass Substances 0.000 description 2
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
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Abstract
The invention discloses a kind of display methods of liquid crystal display panel and devices, by periodically acquiring frame data；Determine the frame data currently obtained relative to the preceding frame data once obtained with the presence or absence of tableaux region；If so, generating the enable signal with the first level；If it is not, then generating the enable signal with second electrical level；Determine enable signal keep the first level be more than the first preset duration and enable signal from the first level conversion be second electrical level when, reset after gamma electric voltage while the second preset duration of amendment corresponding to each grayscale after tableaux region to be converted to dynamic menu.It is also easy to produce image retention in the area when tableaux region is converted to dynamic menu, the above method can carry out the adjusting of gamma electric voltage for the region for generating image retention to eliminate image retention, it does not need all to carry out image retention amendment to whole display areas, it is corrected hence for image retention more targeted, display effect is effectively promoted, the stability that picture is shown is promoted.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display method and device for a display panel.
Background
Thin Film Transistor Liquid Crystal displays (TFT-LCDs) have the advantages of small size, low power consumption, no radiation, high resolution, and the like, and have a leading role in the current Display field, and have been widely used in various digital information devices.
When an electrode in the TFT-LCD generates an electric field, signal voltage directly controls the on-off state of the thin film crystal, and then the transistor is used for controlling liquid crystal molecules, so that the liquid crystal molecules are twisted, and therefore light rays passing through the liquid crystal molecules are regularly refracted, and images are displayed on a screen of the TFT-LCD. If the screen of the TFT-LCD displays a picture which is static and unchangeable for a long time, the charged ions in the liquid crystal are adsorbed at the two ends of the upper glass and the lower glass to form a built-in electric field, and the ions are not released immediately after the picture is switched, so that the phenomenon of generating residual images on the picture can be caused when liquid crystal molecules do not rotate to the corresponding rotating angle immediately.
With the development of display technology, vehicle-mounted display is more and more widely used, most automobiles are provided with a TFT-LCD as a navigation system at present, even the TFT-LCD is used for realizing functions such as central control and the like, so that the vehicle-mounted display is required to have higher stability and reliability, but when the existing display is used as the navigation system, a display picture for navigation is continuously changed, some display pictures for reference or identification are not changed for hours, and a static local picture in the display screen is easy to have afterimages.
Disclosure of Invention
The embodiment of the invention provides a display method and a display device of a liquid crystal display panel, which are used for preventing a static local picture in a liquid crystal display screen from generating an afterimage.
In a first aspect, an embodiment of the present invention provides a display method for a liquid crystal display panel, including:
periodically acquiring frame data;
determining whether the currently acquired frame data has a static picture area relative to the previously acquired frame data; if yes, generating an enable signal with a first level; if not, generating an enable signal with a second level;
and when the enable signal is determined to keep the first level for more than a first preset time and the enable signal is converted from the first level to a second level, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are reset after the second preset time is modified.
In a possible implementation manner, in the foregoing method provided by an embodiment of the present invention, the determining whether a static picture area exists in currently acquired frame data relative to frame data acquired last time includes:
determining whether the currently acquired frame data and the previously acquired frame data have the same data in a certain area; if yes, determining the area as the static picture area; if not, the static picture area does not exist.
In a possible implementation manner, in the method provided in an embodiment of the present invention, the resetting after the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are corrected for a second preset time period at the same time includes:
when the liquid crystal display panel is predetermined to display positive afterimages, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are adjusted downwards for a second preset time period at the same time and then reset;
and when the liquid crystal display panel is predetermined to display the negative afterimage, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are simultaneously adjusted up for a second preset time length and reset.
In a possible implementation manner, in the foregoing method provided in an embodiment of the present invention, the first level is a high level, and the second level is a low level;
or, the first level is a low level, and the second level is a high level.
In a possible implementation manner, in the foregoing method provided by the embodiment of the present invention, the second preset time period is not less than 5 minutes.
In a second aspect, an embodiment of the present invention provides a display device of a liquid crystal display panel, including:
an acquisition unit configured to periodically acquire frame data;
an enable signal generation unit for determining whether a static picture area exists in the currently acquired frame data with respect to the previously acquired frame data; if yes, generating an enable signal with a first level; if not, generating an enable signal with a second level;
and the processing unit is used for resetting after gamma voltages corresponding to gray scales of the static picture area converted into the dynamic picture are corrected for a second preset time length at the same time when the enable signal is determined to keep the first level to exceed a first preset time length and the enable signal is converted from the first level to the second level.
In a possible implementation manner, in the apparatus provided in an embodiment of the present invention, the enable signal generating unit is specifically configured to determine whether there is the same data in a certain area between currently acquired frame data and frame data acquired last time; if yes, determining the area as the static picture area; if not, the static picture area does not exist.
In a possible implementation manner, in the apparatus provided in an embodiment of the present invention, the processing unit is specifically configured to, when the liquid crystal display panel is predetermined to display a positive afterimage, convert the static image area into a gamma voltage corresponding to each gray scale after a dynamic image, and reset after the gamma voltage is decreased for a second preset time period;
and when the liquid crystal display panel is predetermined to display the negative afterimage, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are simultaneously adjusted up for a second preset time length and reset.
In a possible implementation manner, in the above apparatus provided by the embodiment of the present invention, the enable signal generating unit is specifically configured to generate an enable signal at a high level when it is determined that the currently acquired frame data has a static picture area relative to the previously acquired frame data; generating a low-level enable signal when it is determined that no static picture area exists in the currently acquired frame data relative to the previously acquired frame data; or,
when the fact that the currently acquired frame data has a static picture area relative to the previously acquired frame data is determined, generating a low-level enable signal; when it is determined that the currently acquired frame data does not have a static picture area with respect to the previously acquired frame data, an enable signal of a high level is generated.
In a possible implementation manner, in the above apparatus provided by the embodiment of the present invention, the second preset time period is not less than 5 minutes.
The invention has the following beneficial effects:
according to the display method and the display device of the liquid crystal display panel, provided by the embodiment of the invention, frame data is acquired periodically; determining whether the currently acquired frame data has a static picture area relative to the previously acquired frame data; if yes, generating an enable signal with a first level; if not, generating an enable signal with a second level; and when the enable signal is determined to keep the first level for more than the first preset time and the enable signal is converted from the first level to the second level, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are reset after the second preset time is modified. When the enabling signal is converted from the first level to the second level, namely, when the static picture area is converted into the dynamic picture, the residual image is easily generated in the area, the method can adjust the gamma voltage aiming at the area generating the residual image so as to eliminate the residual image, and the residual image correction is not required to be carried out on all display areas, so that the residual image correction is more targeted, the display effect is effectively improved, and the picture display stability is improved.
Drawings
FIG. 1 is a flowchart illustrating a display method of an LCD panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a display screen of an LCD panel according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an enable signal according to an embodiment of the present invention;
FIG. 4a is a diagram of one of the display images of the on-board display screen according to the embodiment of the present invention;
FIG. 4b is a second display image of the on-board display screen according to the embodiment of the present invention;
FIG. 4c is a schematic diagram of a symmetric gamma curve according to an embodiment of the present invention;
FIG. 4d is a schematic diagram of an asymmetric gamma curve according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a display device of a liquid crystal display panel according to an embodiment of the invention.
Detailed Description
To solve the problems in the prior art, embodiments of the present invention provide a display method and device for a liquid crystal display panel, so as to prevent a still local image in a liquid crystal display from having an afterimage.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.
The following describes a display method and device of a liquid crystal display panel according to an embodiment of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a display method of a liquid crystal display panel, which specifically includes the following steps:
s101, periodically acquiring frame data;
s102, determining whether a static picture area exists in the currently acquired frame data relative to the previously acquired frame data; if yes, go to step S103; if not, executing step S104;
s103, when the currently acquired frame data has a static picture area relative to the previously acquired frame data, generating an enable signal with a first level;
s104, when the currently acquired frame data does not have a static picture area relative to the previously acquired frame data, generating an enable signal with a second level;
s105, when the enable signal is determined to keep the first level exceeding the first preset time and the enable signal is converted from the first level to the second level, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are corrected for the second preset time and then reset is carried out.
In the method provided by the embodiment of the present invention, a static picture area in a display picture is determined by continuously comparing frame data acquired periodically, and when an image in the static picture area does not change, an enable signal of a first level is generated, and when an image in the static picture area changes, that is, the static picture area is converted into a dynamic picture, an enable signal of a second level is generated. In the method provided by the embodiment of the invention, the gamma voltages corresponding to the gray scales in the region can be simultaneously adjusted, namely, the original gamma curve in the region is shifted, the original symmetrical gamma curve is converted into an asymmetrical form, and the adjusted gamma voltages are used as correction voltages, so that the finally output data voltage and the common voltage provide a bias electric field for the liquid crystal molecules in the region to restore the liquid crystal to a normal deflection state so as to correct the deflection angle of the liquid crystal molecules and prevent the liquid crystal display panel from generating a residual image phenomenon.
Specifically, in the above step S101, the period of periodically acquiring the frame data may be 5 minutes, the frame data in each period may be N frames, and in the implementation, the first frame data in each period may be acquired, or the frame data may be acquired every 5 minutes. The period is an experimental value, and the specific value of the period can be flexibly changed according to actual needs, which is not limited herein. In addition, the frame data may be display frame data LVDS data transmitted in a low voltage differential signaling manner, or may also be in a data form such as transistor logic signal TTL, which is not limited herein.
In a specific implementation, in step S102, determining whether the currently acquired frame data has a static picture area relative to the frame data acquired last time may specifically include:
determining whether the currently acquired frame data and the previously acquired frame data have the same data in a certain area; if yes, determining the area as a static picture area; if not, the static picture area does not exist.
In an understandable situation, if the frame data in a certain region continuously remains the same, the picture displayed in the region does not change, i.e., a static picture is displayed, and thus the region can be determined to be a static picture region. When comparing the currently acquired frame data with the previously acquired frame data, if the same data exists in a certain area, the frame data in the area keeps unchanged for one period, so that the area can be determined as a static picture area, the coordinate position of the area and the data line corresponding to the area are recorded, and the signal output by the data line corresponding to the area can be adjusted in the afterimage correction stage to realize the correction of the afterimage.
Further, in the step S103, generating the enable signal with the first level may specifically include: generating an enable signal of a high level; accordingly, in the step S104, generating the enable signal with the second level may specifically include: generating an enable signal of a low level; alternatively, step S103 may specifically be: generating an enable signal of a low level; correspondingly, step S104 may specifically be: an enable signal of high level is generated. In specific implementation, as long as the first level is not equal to the second level, an appropriate level signal may be output as an enable signal as needed, which is not limited herein.
In a specific implementation, in the step S105, resetting after the gamma voltages corresponding to the gray scales of the still image region converted into the dynamic image region are corrected for the second preset time period, which may specifically include:
when the liquid crystal display panel is predetermined to display positive afterimages, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are adjusted downwards for a second preset time period and then reset;
and when the liquid crystal display panel is predetermined to display the negative afterimage, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are simultaneously adjusted up for a second preset time period and reset.
In practical application, each liquid crystal display panel can determine the type of the residual image when displaying the residual image after being manufactured, and the adjustment directions of the gamma voltages in the residual image display area are different according to different types of the residual images. Specifically, when the liquid crystal display panel is preset and determined to display positive afterimages, the gamma voltages corresponding to the gray scales in the static image area of the liquid crystal display panel can be simultaneously reduced, that is, the original gamma curve in the area is wholly shifted downwards for a second preset time period and then reset, for example, the gamma curve in the area is wholly shifted downwards for 0.1V and is reset after the gamma curve in the area is kept for the second preset time period; when the liquid crystal display panel is preset and determined to display negative afterimages, the gamma voltages corresponding to the gray scales in the static picture area of the liquid crystal display panel can be simultaneously adjusted upwards, namely, the original gamma curve in the area is wholly shifted upwards for a second preset time and then reset. In specific implementation, the original gamma curve in the region is a curve formed by gamma voltage values corresponding to gray scales with positive and negative polarities symmetrical to the common voltage, and the voltage difference of the symmetrical gamma curves relative to the common voltage is equal. After the residual image is generated, the built-in electric field formed by the direct current residual caused by keeping the static image for a long time can be compensated only by shifting the original gamma curve in the area generating the residual image upwards or downwards integrally, so that the direct current bias is eliminated, and the residual image is prevented from being generated on the display image.
In one possible embodiment, if the liquid crystal is usedWhen the display panel provides the common voltage for the subareas, the purpose of eliminating the afterimage can be achieved by adjusting the common voltage of the corresponding area. For example, when the LCD panel is divided into 9 display regions of 3 × 3, as shown in FIG. 2, the display regions respectively correspond to the 9 display regions A-I in FIG. 2, and each display region is provided with a common voltage, i.e. the common voltage of region A is VCOMaThe common voltage of the region B is VCOMbBy analogy, the common voltage of the region I is VCOMiWhen the residual image appears on the display picture, firstly, the display area where the residual image is located is judged, the public voltage in the area is adjusted up or down according to the type of the residual image for a second preset time, and a bias electric field is provided for the liquid crystal molecules in the area to enable the liquid crystal to recover the normal deflection state, so that the deflection angle of the liquid crystal molecules is corrected, and the phenomenon of the residual image appearing on the liquid crystal display panel is prevented. For example, if a positive afterimage is generated in the region E when the display image is changed, the common voltage VCOM in the region E is seteAfter the voltage is reduced by 0.1V and kept for 5 minutes, the residual image in the area E can be eliminated.
The adjustment process of the original gamma curve is described below by taking the example that the enable signal S1 is set high in the presence of the still picture area and that the lcd panel is determined to display positive afterimage.
As shown in fig. 3, only when the high-level holding time h of the enable signal S1 exceeds the first preset time, the gamma voltages corresponding to the gray scales in the region are simultaneously adjusted downward by 0.1V, that is, the original gamma curve in the region is shifted downward by 0.1V as a whole, and the shifted gamma curve is provided to the source driving module of the liquid crystal display panel to output and hold the output for the second preset time, and then the gamma voltages corresponding to the gray scales are reset, thereby preventing the generation of the afterimage. The first preset time period is an experimental value, and the value thereof can be any time period meeting the actual requirement, such as 10 minutes, 15 minutes, 20 minutes, 1 hour or longer. As shown in fig. 3, when the first preset time period set by the embodiment of the present invention is 1 hour, that is, when the still picture is considered to be kept for at least 1 hour, afterimages are likely to be generated in the area. And the second predetermined period of time may be at least 5 minutes. And in a set time length, the gamma curve in the area keeps an offset state, and the direct current bias in the area is corrected, so that the deflection angle of the liquid crystal molecules can be completely corrected. Therefore, the second preset duration is also an empirical value, and in specific implementation, the length of the second preset duration can be flexibly adjusted without limiting specific values of the second preset duration.
The above display method provided by the embodiment of the present invention is explained as an example as follows.
When the on-board display screen is a liquid crystal display panel, a memory for storing frame data may be generally built in the on-board display system, and it is set that the frame data is acquired every 5 minutes and stored in the memory, and by continuously comparing the frame data acquired by the memory each time, the following two display situations generally exist:
the first condition is as follows: the frame data are compared to determine that the acquired frame data are completely consistent, that is, the vehicle-mounted display screen stays in a certain static interface, for example, a picture of the vehicle-mounted display screen stays in an operation interface, and a plurality of application software icons are included in the display picture, as shown in fig. 4 a.
Case two: by comparing the frame data, it can be determined that some areas in the vehicle-mounted display screen are continuously changed, and the rest areas are in a static state. For example, when the vehicle-mounted display screen is in the navigation mode, as shown in fig. 4b, since the road condition information is continuously updated and changed, the picture of the middle area of the display screen is continuously changed, and the pictures of the operation indication marks located around the display screen are kept unchanged.
As can be seen from the above description, the operation indication mark images located around the display screen remain unchanged for a long time, so that when the display image in the area changes and generates an afterimage, the liquid crystal polarization is caused by different positive and negative polarity voltage differences of the liquid crystal due to the dc residue inside the display screen, and at this time, a bias electric field for correction needs to be added to restore the liquid crystal to a normal deflection state. In the first case, since the whole screen of the display is still, when the afterimage is generated on the full screen, the common voltage VCOM may be shifted and adjusted, for example, a voltage difference of positive and negative polarities may be increased to compensate the built-in electric field caused by the dc residual, so as to cause the afterimage. In the second case, only a partial area generates an afterimage, for example, a built-in electric field occurs in the display internal a area due to dc residue, and the B area does not generate dc residue, and at this time, if the VCOM in the entire display area is shifted, an effect of non-uniform full-screen afterimage effect occurs, that is, the afterimage in the a area disappears, and the afterimage in the B area appears, and the expected effect of afterimage optimization cannot be achieved.
In the second case, by adopting the method provided by the embodiment of the invention, the gamma voltage corresponding to each gray scale in the static picture area is adjusted, so that the afterimage generated in the local area disappears. For example, two Gamma (Gamma) modules can be preset, i.e., the Gamma 1 module can be configured with a conventional symmetrical Gamma curve for the display panel before adjustment, wherein the positive and negative Gamma curves are symmetrical curves with respect to the VCOM signal, i.e., V+-VCOM＝VCOM-V-As shown in fig. 4 c; the Gamma 2 module sets an asymmetric Gamma curve for residual image correction, in which the positive and negative curves are not symmetric about the VCOM signal, but there exists a V' that compensates for the DC residual field voltage, i.e., (V)+-VCOM)-(VCOM-V-) V', as shown in fig. 4d, the Gamma curve of the Gamma 2 module only affects the positive and negative polarity deviations, and does not affect the gray-scale luminance. When the residual image occurs, the signal corresponding to the originally static picture area is only required to be switched from the conventional symmetrical GAMA1 to the asymmetrical GAMA2, so that the positive and negative polarity voltage differences of the liquid crystal molecules are subjected to certain deviation, the deviation of the original positive and negative polarity voltages can be compensated, and the residual image disappears.
Based on the same inventive concept, an embodiment of the present invention provides a display device of a liquid crystal display panel, which has a structure as shown in fig. 5, and includes:
an acquisition unit 51 for periodically acquiring frame data;
an enable signal generation unit 52 for determining whether or not a still picture region exists in the currently acquired frame data with respect to the previously acquired frame data; if yes, generating an enable signal with a first level; if not, generating an enable signal with a second level;
and the processing unit 53 is configured to reset after the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are corrected for the second preset time period at the same time when it is determined that the enable signal keeps the first level for longer than the first preset time period and the enable signal is converted from the first level to the second level.
Optionally, the enable signal generating unit 52 is specifically configured to determine whether the currently acquired frame data and the previously acquired frame data have the same data in a certain area; if yes, determining the area as a static picture area; if not, the static picture area does not exist.
Optionally, the processing unit 53 is specifically configured to, when the liquid crystal display panel is predetermined to display a positive afterimage, reset after gamma voltages corresponding to respective gray scales after the static picture area is converted into the dynamic picture are simultaneously adjusted downward for a second preset time period;
and when the liquid crystal display panel is predetermined to display the negative afterimage, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are simultaneously adjusted up for a second preset time period and reset.
Alternatively, the enable signal generating unit 52 is specifically configured to generate an enable signal of a high level when it is determined that the currently acquired frame data exists in a static picture area with respect to the previously acquired frame data; generating a low-level enable signal when it is determined that no static picture area exists in the currently acquired frame data relative to the previously acquired frame data; or,
when the fact that the currently acquired frame data has a static picture area relative to the previously acquired frame data is determined, generating a low-level enable signal; when it is determined that the currently acquired frame data does not have a static picture area with respect to the previously acquired frame data, an enable signal of a high level is generated.
Optionally, the processing unit 53 is specifically configured to modify the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture for at least 5 minutes and then reset.
Optionally, the acquiring unit 51 is specifically configured to periodically acquire the display screen data transmitted in the low voltage differential signal manner.
According to the display method and the display device of the liquid crystal display panel, provided by the embodiment of the invention, frame data is acquired periodically; determining whether the currently acquired frame data has a static picture area relative to the previously acquired frame data; if yes, generating an enable signal with a first level; if not, generating an enable signal with a second level; and when the enable signal is determined to keep the first level for more than the first preset time and the enable signal is converted from the first level to the second level, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are reset after the second preset time is modified. When the enabling signal is converted from the first level to the second level, namely, when the static picture area is converted into the dynamic picture, the residual image is easily generated in the area, the method can adjust the gamma voltage aiming at the area generating the residual image so as to eliminate the residual image, and the residual image correction is not required to be carried out on all display areas, so that the residual image correction is more targeted, the display effect is effectively improved, and the picture display stability is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A display method of a liquid crystal display panel is characterized by comprising the following steps:
periodically acquiring frame data;
determining whether the currently acquired frame data has a static picture area relative to the previously acquired frame data; if yes, generating an enable signal with a first level; if not, generating an enable signal with a second level;
when the enable signal is determined to keep the first level for more than a first preset time and the enable signal is converted from the first level to a second level, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are reset after the second preset time is modified;
wherein, the resetting after the gamma voltages corresponding to the gray scales of the static picture area converted into the dynamic picture are corrected for a second preset time period at the same time comprises:
when the liquid crystal display panel is predetermined to display positive afterimages, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are adjusted downwards for a second preset time period at the same time and then reset;
and when the liquid crystal display panel is predetermined to display the negative afterimage, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are simultaneously adjusted up for a second preset time length and reset.
2. The method of claim 1, wherein the determining whether the currently acquired frame data has a static picture area relative to the previously acquired frame data comprises:
determining whether the currently acquired frame data and the previously acquired frame data have the same data in a certain area; if yes, determining the area as the static picture area; if not, the static picture area does not exist.
3. The method of claim 1, wherein the first level is a high level and the second level is a low level;
or, the first level is a low level, and the second level is a high level.
4. The method of claim 1, wherein the second predetermined period of time is not less than 5 minutes.
5. A display device of a liquid crystal display panel, comprising:
an acquisition unit configured to periodically acquire frame data;
an enable signal generation unit for determining whether a static picture area exists in the currently acquired frame data with respect to the previously acquired frame data; if yes, generating an enable signal with a first level; if not, generating an enable signal with a second level;
the processing unit is used for resetting after gamma voltages corresponding to gray scales of the static picture area converted into the dynamic picture are corrected for a second preset time length at the same time when the enable signal is determined to keep the first level to exceed a first preset time length and the enable signal is converted from the first level to the second level;
the processing unit is specifically configured to, when the liquid crystal display panel is predetermined to display a positive afterimage, convert the static picture area into a gamma voltage corresponding to each gray scale of a dynamic picture and simultaneously adjust down for a second preset time period, and reset;
and when the liquid crystal display panel is predetermined to display the negative afterimage, the gamma voltages corresponding to the gray scales after the static picture area is converted into the dynamic picture are simultaneously adjusted up for a second preset time length and reset.
6. The apparatus according to claim 5, wherein the enable signal generating unit is specifically configured to determine whether the currently acquired frame data and the previously acquired frame data have the same data in a certain area; if yes, determining the area as the static picture area; if not, the static picture area does not exist.
7. The apparatus according to claim 5, wherein the enable signal generating unit is specifically configured to generate the enable signal at a high level when it is determined that the currently acquired frame data exists in the still picture region with respect to the frame data acquired last time; generating a low-level enable signal when it is determined that no static picture area exists in the currently acquired frame data relative to the previously acquired frame data; or,
when the fact that the currently acquired frame data has a static picture area relative to the previously acquired frame data is determined, generating a low-level enable signal; when it is determined that the currently acquired frame data does not have a static picture area with respect to the previously acquired frame data, an enable signal of a high level is generated.
8. The apparatus of claim 5, wherein the second predetermined period of time is not less than 5 minutes.
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| CN108305591B (en) * | 2018-02-12 | 2020-06-26 | 京东方科技集团股份有限公司 | Display control method and display device |
| KR102552804B1 (en) * | 2018-07-25 | 2023-07-10 | 삼성디스플레이 주식회사 | Display device and method of driving the same |
| CN110580871A (en) * | 2019-08-07 | 2019-12-17 | 深圳市华星光电半导体显示技术有限公司 | method for intelligently compensating residual shadow |
| CN110556084A (en) * | 2019-09-10 | 2019-12-10 | 江苏铁锚玻璃股份有限公司 | Display method combining image dynamic and static display for preventing ghost shadow |
| CN110706666B (en) * | 2019-09-16 | 2021-08-24 | 深圳市华星光电半导体显示技术有限公司 | Picture transition method, device, controller and storage medium |
| CN111477192B (en) * | 2020-05-25 | 2022-04-15 | 京东方科技集团股份有限公司 | Adjusting method, adjusting module and display device |
| CN114077470B (en) * | 2020-08-21 | 2023-10-10 | 广州视源电子科技股份有限公司 | Liquid crystal display control method, device, equipment and storage medium |
| CN114114972B (en) * | 2020-08-31 | 2023-11-14 | 比亚迪股份有限公司 | I/O control system and automobile thereof |
| CN113192463B (en) * | 2021-05-11 | 2022-11-04 | 合肥京东方卓印科技有限公司 | Light emitting control shift register, gate driving circuit, display device and method |
| EP4318452A4 (en) * | 2021-07-21 | 2024-05-08 | BOE Technology Group Co., Ltd. | Control apparatus and driving method therefor, and display apparatus |
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