CN110728944A - Display device and display method - Google Patents
Display device and display method Download PDFInfo
- Publication number
- CN110728944A CN110728944A CN201911054267.8A CN201911054267A CN110728944A CN 110728944 A CN110728944 A CN 110728944A CN 201911054267 A CN201911054267 A CN 201911054267A CN 110728944 A CN110728944 A CN 110728944A
- Authority
- CN
- China
- Prior art keywords
- sub
- pixel
- gray scale
- pixels
- preset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a display device and a display method, relates to the technical field of display, and aims to improve the low-gray-scale display effect of a display panel. The display device comprises a display panel, an acquisition unit, a judgment unit and a processing unit. The acquisition unit is used for acquiring image data, and the image data comprises target gray scales corresponding to the sub-pixels. The processing unit stores a first mapping relation between the first brightness and the target gray scale and a second mapping relation between the second brightness and the sum of the mother gray scale and the sub-pixel display period, wherein the sub-pixel display period comprises M1 light-emitting time periods and M2 non-light-emitting time periods. And when the target gray scale is smaller than the preset gray scale, the processing unit is used for enabling the sub-pixel to emit light according to the first mapping relation and the second mapping relation in the light emitting time period of one sub-pixel display period, wherein the light emitting time period is larger than or equal to the preset gray scale of the mother plate gray scale, and the light emitting time period is not used for enabling the sub-pixel to emit light.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a display device and a display method.
[ background of the invention ]
The correspondence between the gray-scale voltage and the brightness of the display panel may be represented by a gamma curve. At present, the gamma curve corresponding to the display panel is easy to deviate from the standard curve in the low gray scale range. As shown in fig. 1, fig. 1 is a graph showing gamma values and gray levels measured at power voltages PVDD of 4.6V, 4.15V and 4.56V, respectively, in the prior art, wherein the ordinate is the gamma value and the abscissa is the gray level. PVDD4.6 illustrates a curve of gamma values obtained at different gray levels with a supply voltage of 4.6V, PVDD4.15 illustrates a curve of gamma values obtained at different gray levels with a supply voltage of 4.15V, and PVDD4.56 illustrates a curve of gamma values obtained at different gray levels with a supply voltage of 4.56V. At present, the gamma value of the display panel is usually set to be between 2 and 2.5. However, as can be seen from FIG. 1, in the low gray scale (e.g., 0-14), the gamma values corresponding to the three curves are all out of the standard specification. Therefore, the display panel is prone to display mura and color shift when displaying low gray scale images.
[ summary of the invention ]
In view of the above, embodiments of the present invention provide a display device and a display method for improving a low gray scale display effect of a display panel.
In one aspect, an embodiment of the present invention provides a display device, including:
a display panel including a plurality of sub-pixels;
an acquisition unit configured to acquire image data including a target grayscale corresponding to the sub-pixel;
the judgment unit is used for judging whether the target gray scale of the sub-pixel is smaller than a preset gray scale or not;
the processing unit is used for enabling the sub-pixels to emit light according to the master gray scale in the light emitting time period in one sub-pixel display period according to the first mapping relation and the second mapping relation, and enabling the sub-pixels not to emit light in the non-light emitting time period; wherein M1 and M2 are both positive integers;
the mother plate gray scale is greater than or equal to the preset gray scale;
the basis for determining the second mapping relation between the second brightness and the gray scale of the mother plate and the display period of the sub-pixels comprises the following steps:
in one sub-pixel display period, the absolute value of the difference between the value of the second brightness of the sub-pixel emitting light with the master gray scale in the light emitting time period and the value of the first brightness of the sub-pixel continuously emitting light with the target gray scale in one sub-pixel display period is less than or equal to a preset threshold value.
In another aspect, an embodiment of the present invention provides a display method, including:
acquiring image data, wherein the image data comprises a target gray scale corresponding to a sub-pixel;
judging whether the target gray scale of the sub-pixel is smaller than a preset gray scale or not;
when the target gray scale is smaller than the preset gray scale, according to a first mapping relation between first brightness and the target gray scale and a second mapping relation between second brightness and a mother board gray scale and a sub-pixel display period, wherein the sub-pixel display period comprises M1 light-emitting time periods and M2 non-light-emitting time periods, in the light-emitting time period in one sub-pixel display period, the sub-pixel is made to emit light in the mother board gray scale, and in the non-light-emitting time period, the sub-pixel is made not to emit light; wherein M1 and M2 are both positive integers;
the mother plate gray scale is greater than or equal to the preset gray scale;
the basis for determining the second mapping relation between the second brightness and the gray scale of the mother plate and the display period of the sub-pixels comprises the following steps:
in one sub-pixel display period, the absolute value of the difference between the value of the second brightness of the sub-pixel emitting light with the master gray scale in the light emitting time period and the value of the first brightness of the sub-pixel continuously emitting light with the target gray scale in one sub-pixel display period is less than or equal to a preset threshold value.
The display device and the display method provided by the embodiment of the invention can convert the display of the sub-pixel with smaller target gray scale in the image data into the display through larger mother board gray scale according to the pre-established first mapping relation and second mapping relation aiming at the received image data, and particularly can realize the accurate adjustment of the brightness of the sub-pixel under the lower gray scale by controlling the light-emitting time and the non-light-emitting time of the sub-pixel in the display period of the sub-pixel according to the mother board gray scale, thereby being beneficial to reducing the mura condition of the displayed picture and restoring the real picture information.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a graph showing gamma values and gray levels measured when a power supply voltage PVDD is 4.6V, 4.15V and 4.56V, respectively, in the prior art;
fig. 2 is a schematic diagram of a display device according to an embodiment of the invention;
FIG. 3 is a diagram illustrating a first mapping relationship between a first luminance L1 and a target gray level G1 according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of four low gray scale sub-pixels in a predetermined area of a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a display process of the third sub-pixel shown in FIG. 4 during a display period of one region;
FIG. 6 is a schematic diagram illustrating a display process of the fourth sub-pixel shown in FIG. 4 during a display period of one region;
FIG. 7 is a schematic diagram illustrating a display process of the fifth sub-pixel shown in FIG. 4 during a display period of one region;
FIG. 8 is a schematic diagram illustrating a display process of the sixth sub-pixel shown in FIG. 4 during a display period of one region;
FIG. 9 is a schematic diagram illustrating a display process of the preset area shown in FIG. 4 in an area display period;
fig. 10 is a schematic diagram illustrating a display process of four identical low-gray-scale sub-pixels in a predetermined area of a display panel in a display period of the predetermined area according to an embodiment of the present invention;
fig. 11 is a flowchart illustrating a display method according to an embodiment of the present invention;
FIG. 12 is a flowchart illustrating another display method according to an embodiment of the present invention;
FIG. 13 is a flowchart illustrating another display method according to an embodiment of the present invention;
FIG. 14 is a flowchart illustrating another display method according to an embodiment of the present invention;
fig. 15 is a flowchart illustrating another display method according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all 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 terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe the mapping relationships in the embodiments of the present invention, the mapping relationships should not be limited to these terms. These terms are only used to distinguish the respective mapping relationships from each other. For example, the first mapping relationship may also be referred to as the second mapping relationship, and similarly, the second mapping relationship may also be referred to as the first mapping relationship without departing from the scope of the embodiments of the present invention.
An embodiment of the present invention provides a display device, as shown in fig. 2, and fig. 2 is a schematic diagram of the display device provided in the embodiment of the present invention, where the display device includes a display panel 1, an obtaining unit 2, a judging unit 3, and a processing unit 4. The display panel 1 includes a plurality of sub-pixels 10. The acquisition unit 2 is configured to acquire image data including a target gray level G1 corresponding to a sub-pixel. The determining unit 3 is connected to the obtaining unit 2, and is configured to determine whether the target gray level G1 of the sub-pixel 10 is smaller than a preset gray level. The processing unit 4 stores a first mapping relationship between the first luminance L1 and the target gray level G1 as shown in FIG. 3. Given a target gray level G1, a first luminance L1 corresponding to the target gray level G1 can be obtained by looking up the first mapping relationship shown in FIG. 3. The processing unit 4 further stores a second mapping relationship of the second luminance L2 with the reticle gray scale G0 and the sub-pixel display period T1 as shown in table 1. Wherein the gray scale G0 of the master mask is greater than or equal to a preset gray scale. The sub-pixel display period T1 includes M1 light-emitting periods and M2 non-light-emitting periods. M1 and M2 are both positive integers.
TABLE 1
In the embodiment of the present invention, after the sub-pixel display period T1 is determined, the M1 light emission periods and the M2 non-light emission periods are also determined accordingly. Taking the duration of each of the light emission period and the non-light emission period as an example of T, T1, M1, M2, and T satisfy T1 ═ M1+ M2) T. For example, taking the case of selecting the master gray scale G0_2 and the sub-pixel display period T1_3 as an example, according to the second mapping relationship shown in table 1, the luminance of the sub-pixel when displaying under the conditions of the master gray scale G0_2 and the sub-pixel display period T1_3 is L2_ 10.
When the target gray level G1 is smaller than the preset gray level, the processing unit 4 according to the embodiment of the invention is configured to enable the sub-pixel to emit light according to the master gray level G0 in the light emitting time period within one sub-pixel display period T1 according to the first mapping relationship and the second mapping relationship, and to disable the sub-pixel from emitting light in the non-light emitting time period. In one sub-pixel display period T1, an absolute value of a difference between a value of a second luminance L2 of the sub-pixel emitting light at the master gray scale G0 in the light emitting period and a value of a first luminance L1 of the sub-pixel continuously emitting light at the target gray scale G1 in one sub-pixel display period T1 is equal to or less than a preset threshold L0, that is, the following conditions are satisfied: L1-L2 is less than or equal to L0.
In the embodiment of the invention, the preset gray scale can select the lowest gray scale corresponding to the better Mura condition of the display picture. For example, the preset gray level may be set to 18, 17, or 16, which is not limited in the embodiment of the present invention. The preset threshold may be adjusted according to different requirements of different users on the display panel, for example, the preset threshold may be set to 0, that is, the master gray scale and the sub-pixel display period corresponding to the target gray scale are selected from the first mapping relationship and the second mapping relationship according to the first brightness and the second brightness which are equal in brightness value. Alternatively, the preset threshold may be set to another value, which is not limited in the embodiment of the present invention.
Specifically, when the display device operates, image data is first acquired by the acquisition unit 2. The image pixel data includes target gray levels for a plurality of sub-pixels. For any sub-pixel, the determining unit 3 is used to determine whether the target gray scale of the sub-pixel is smaller than a preset gray scale, if the target gray scale of the sub-pixel is smaller than the preset gray scale, the processing unit 4 makes the sub-pixel master gray scale G0 emit light in a light emitting time period within a sub-pixel display period according to the first mapping relation and the second mapping relation, and makes the sub-pixel not emit light in a non-light emitting time period. For example, if the target gray level of the sub-pixel is 10 and the predetermined gray level is 16, first, the first luminance L1 of the sub-pixel at 10 gray levels can be determined by looking up the first mapping relationship shown in fig. 1, assuming that the first luminance L1 is 50 nit. Then, by looking up the second mapping relationship shown in table 1, the master gray scale G0_ x and the sub-pixel display period T1_ x corresponding to the second luminance L2 equal to or close to 50nit are found, wherein the sub-pixel display period T1_ x includes M1_ x light-emitting periods and M2_ x non-light-emitting periods. Then, the sub-pixels can be caused to emit light in the master gray scale G0_ x for M1_ x light emission periods and not emit light in the M2_ x non-light emission periods by the processing unit 4. In one sub-pixel display period T1 consisting of M1_ x light-emission periods and M2_ x non-light-emission periods, the luminance of the sub-pixel is close to or equal to 50 nit.
As can be seen from the above description of the working process of the display device, the display device provided in the embodiment of the present invention can convert the display of the sub-pixel with the smaller target gray scale in the image data into the display with the larger mother plate gray scale according to the pre-established first mapping relationship and second mapping relationship for the received image data, and specifically, by controlling the light emitting time when the sub-pixel emits light with the mother plate gray scale in one sub-pixel display period and the non-light emitting time, the accurate adjustment of the brightness of the sub-pixel with the lower gray scale can be realized with the higher gray scale, which is beneficial to reducing the mura condition of the displayed image and restoring the real image information.
For example, the first mapping relationship and the second mapping relationship may be stored in a processing unit in advance, the processing unit may be a flash Memory (flash) in a driver chip or an Electrically-Erasable-Programmable Read-Only Memory (EEPROM), and the stored data may be called when a gray level value in a low gray level range occurs when an image is displayed.
Optionally, when determining the first mapping relationship and the second mapping relationship, the detection of the sub-pixel brightness may be implemented by an optical collecting Device, such as a Charge-coupled Device (CCD) camera.
For example, in a specific display, the sub-pixel display period may be determined according to the frame rate of the image display. For example, the processing unit 4 may make the sub-pixel display period T1 be the display time of at least one frame of picture. Taking the frame rate of 60Hz as an example, the sub-pixel display period T1 may be set to 16.7ms or an integer multiple thereof.
In the embodiment of the present invention, the inventor obtains the correspondence between the target gray scale and the mother gray scale, and the sub-pixel display period T1 as shown in table 2 according to the first mapping relationship and the second mapping relationship through testing.
TABLE 2
In which the subpixel display period T1 is a display time of 4 frames, and the first subpixel display period T1_1 indicates that the light emission time is 3 frames and the non-light emission time is 1 frame among the display times of 4 frames. The second subpixel display period T1_2 indicates that the light emission time is 2 frames and the non-light emission time is 2 frames among the display times of the 4-frame picture. The third subpixel display period T1_3 indicates that the light emission time is 1 frame and the non-light emission time is 3 frames among the display times of the 4-frame picture. Taking the mother gray level as 18 and the second sub-pixel display period T1_2 as an example, the corresponding target gray level is 10. That is, in the display time of 3 frames of the picture, the sub-pixel emits light at the master gray scale 18, and in the display time of 1 frame of the picture, the sub-pixel does not emit light, and in this one sub-pixel display period T1, the luminance of the sub-pixel is the same as or close to the luminance at which it continues to emit light at the target gray scale 10. The correspondence relationship between the target gray scale and the master gray scale shown in table 2 and the sub-pixel display period T1 may be stored in the processing unit 4 in advance, and the display panel may call the data shown in table 2 to directly display the data, thereby shortening the processing time.
For example, when the target gray level G1 of the sub-pixel is greater than or equal to the preset gray level, the processing unit 4 is further configured to make the sub-pixel emit light at the target gray level G1 in one sub-pixel display period, that is, in the embodiment of the present invention, only the sub-pixel with the target gray level G1 smaller than the preset gray level is taken as a processing object, and the sub-pixel with the target gray level G1 greater than or equal to the preset gray level may not be processed.
Optionally, the processing unit 4 is further configured to alternate between M1 non-lighting time periods and M2 lighting time periods, so as to avoid that the sub-pixel 10 is continuously not lighted for a period of time, and further avoid the problem of flicker.
Optionally, the processing unit 4 is further configured to continuously perform M1 light-emitting periods and continuously perform M2 non-light-emitting periods, so as to avoid frequent switching of signals provided by the processing unit 4, which is beneficial to reducing power consumption of the display device.
The above description has been made of the embodiments of the present invention with a single sub-pixel as a processing object. If the target gray scales G1 of the sub-pixels in an area are all smaller than the preset gray scale, the method provided by the embodiment of the invention can also accurately realize the low-gray scale picture display of the area. For an area, there is an area display period T2 during which it is displayed. Specifically, when the area display period T2 is determined, the determining unit 3 determines whether the target gray scales G1 of the N sub-pixels in the preset area Q are all smaller than the preset gray scale. When the target gray scales G1 of the N sub-pixels in the preset region Q are all smaller than the preset gray scale, the determining unit 3 determines whether the sub-pixel display periods of the N sub-pixels are equal. When at least the first sub-pixel 101 and the second sub-pixel 102 having different sub-pixel display periods exist in the N sub-pixels, the processing unit 4 makes the region display period T2 of the preset region Q be the least common multiple of the sub-pixel display period T11 of the first sub-pixel 101 and the sub-pixel display period T12 of the second sub-pixel, so that both the first sub-pixel 101 and the second sub-pixel 102 can accurately display the respective lower target gray scales. For example, taking the sub-pixel display period of the first sub-pixel 101 as 3ms, wherein the non-light-emitting period is 2ms, the light-emitting period is 1ms, and the sub-pixel display period of the second sub-pixel 102 is 4ms, wherein the light-emitting period is 2ms, and the non-light-emitting period is 2ms, for example, for the preset region Q including the first sub-pixel 101 and the second sub-pixel 102, the embodiment of the invention enables the first sub-pixel 101 to complete 4 duty cycles and the second sub-pixel 102 to complete 3 duty cycles within 12ms by making the region display period T2 of the preset region Q be 12ms, so that the preset region Q including the first sub-pixel 101 and the second sub-pixel 102 can accurately present a low-gray scale picture effect.
For example, when the determining unit 3 determines that the target gray levels G1 of the N sub-pixels in the preset region Q are all smaller than the preset gray level, at any time in the region display period T2 of the preset region Q, the processing unit 4 is further configured to make the N1 sub-pixels in the preset region emit light and make the N2 sub-pixels not emit light. N1+ N2, N1 is a positive integer, and N2 is an integer greater than or equal to 0, so as to avoid that all sub-pixels in a preset area do not emit light at a certain time, and a large area shows a dark state.
For example, as shown in fig. 4, fig. 4 is a schematic diagram of four low-gray-scale sub-pixels in a preset region of the display panel provided in the embodiment of the invention, where N is 4, the preset region Q includes a third sub-pixel 103, a fourth sub-pixel 104, a fifth sub-pixel 105 and a sixth sub-pixel 106, and target gray scales of the four sub-pixels are respectively 12, 8, 10 and 5 as examples, as can be seen from table 2, the sub-pixel display periods of the four sub-pixels are all display times of a four-frame image, and at this time, the region display period T2 is the same as the sub-pixel display period.
The master gray level 16 may be selected for the third sub-pixel 103 having a target gray level of 12, the first sub-pixel displaying period T1_ 1. The display process thereof in one area display period T2 is as shown in fig. 5. Wherein 16 is the gray scale of the mother plate, and the black filling blocks represent that the sub-pixels do not emit light.
The mother gray level 16 may be selected for the fourth sub-pixel 104 with a target gray level of 8, and the second sub-pixel displays the period T1_ 2. The display process thereof in one area display period T2 is as shown in fig. 6.
The master gray level 18 can be selected for the fifth subpixel 105 having a target gray level of 10, and the second subpixel exhibits period T1_ 2. The display process thereof in one area display period T2 is as shown in fig. 7.
The mother gray level 17 and the third sub-pixel display period T1_3 may be selected for the sixth sub-pixel 106 with a target gray level of 5. The display process thereof in one area display period T2 is as shown in fig. 8.
In the embodiment of the present invention, at any time in the area display period T2 of the preset area Q, for example, as shown in fig. 9, fig. 9 is a schematic diagram illustrating a display process of the preset area in one area display period shown in fig. 4, when the first frame is displayed, the processing unit 4 makes 3 sub-pixels in the preset area emit light and 1 sub-pixel do not emit light, so as to prevent all sub-pixels in the preset area from not emitting light when the first frame is displayed, and make the preset area exhibit an overall dark state. When displaying the second frame, the processing unit 4 makes 1 sub-pixel in the preset area emit light and 3 sub-pixels do not emit light. When the third frame of picture is displayed, the processing unit 4 makes 3 sub-pixels in the preset area emit light, and 1 sub-pixel does not emit light. When the fourth frame of picture is displayed, the processing unit 4 makes 1 sub-pixel in the preset area emit light and 3 sub-pixels do not emit light.
Optionally, when the target gray scales G1 of the N sub-pixels in the preset region are all smaller than the preset gray scale, the determining unit 3 is further configured to determine whether the target gray scales G1 of the N sub-pixels in the preset region are equal. When the target gray levels G1 of the N sub-pixels in the preset region are all smaller than and equal to the preset gray level, the processing unit 4 is further configured to make the N1 sub-pixels emit light with the same master gray level G0 at any time in the region display period T2 of the preset region. Namely, the N sub-pixels are displayed by selecting the same mother board gray scale and sub-pixel display period, so as to simplify the operation. For example, as shown in fig. 10, fig. 10 is a schematic diagram illustrating a display process of four same low-gray-scale sub-pixels in a preset region in a display panel according to an embodiment of the present invention in a region display period, and taking the target gray scales of the four sub-pixels in the preset region as 12 as an example, the four sub-pixels may emit light with the same mother gray scale 16 at any time in the region display period T2 according to an embodiment of the present invention.
Or, when the target gray scales G1 of the N sub-pixels in the preset region are all smaller than and equal to the preset gray scale, at any time in the region display period T2 of the preset region, the embodiment of the present invention may further enable the processing unit 4 to enable at least two sub-pixels in the N1 sub-pixels to emit light with different mother gray scales G0, where N1 is greater than or equal to 2, as long as it is ensured that the luminance of the two sub-pixels in the region display period T2 is the same as the luminance of each sub-pixel continuously emitting light with the target gray scale in the region display period T2, which is not limited in the embodiment of the present invention.
An embodiment of the present invention further provides a display method, as shown in fig. 11, where fig. 11 is a schematic flow chart of the display method provided in the embodiment of the present invention, where the display method includes:
step S1: image data is acquired, wherein the image data includes a target gray level G1 corresponding to the sub-pixel.
Step S2: it is determined whether the target gray level G1 of the sub-pixel is less than the predetermined gray level. When the target gray level G1 is smaller than the preset gray level, step S3 is performed.
Step S3: according to a first mapping relation between the first brightness L1 and the target gray scale G1 and a second mapping relation between the second brightness L2 and the master gray scale G0 and a sub-pixel display period, wherein the sub-pixel display period comprises M1 light-emitting time periods and M2 non-light-emitting time periods, in the light-emitting time period in one sub-pixel display period, the sub-pixel is made to emit light in the master gray scale G0, and in the non-light-emitting time period, the sub-pixel is made not to emit light; wherein M1 and M2 are both positive integers; the gray scale G0 of the master mask is greater than or equal to the preset gray scale.
The second mapping relationship between the second luminance L2 and the mother gray level G0 and the sub-pixel display period is determined according to the following steps: in one sub-pixel display period, the absolute value of the difference between the value of the second luminance L2 of the sub-pixel emitting light with the master gray scale G0 in the light emitting period and the value of the first luminance L1 of the sub-pixel continuously emitting light with the target gray scale G1 in one sub-pixel display period is equal to or less than a preset threshold value.
The display method provided by the embodiment of the invention can convert the display of the sub-pixel with a smaller target gray scale in the image data into the display through a larger mother plate gray scale according to the pre-established first mapping relation and the second mapping relation aiming at the received image data, and particularly can realize the accurate adjustment of the brightness of the sub-pixel under the lower gray scale by controlling the light-emitting time and the non-light-emitting time of the sub-pixel in the display period of the sub-pixel with the mother plate gray scale, thereby being beneficial to reducing the mura condition of a display picture and restoring the real picture information.
Illustratively, when the target gray level G1 is greater than the preset gray level, the display method according to the embodiment of the present invention further includes:
step S8: in one sub-pixel display period, the sub-pixel is caused to emit light at a target gray level G1. That is, in the embodiment of the present invention, only the sub-pixels with the target gray level G1 smaller than the preset gray level are used as the processing objects, and the sub-pixels with the target gray level G1 greater than or equal to the preset gray level may not be processed.
Exemplarily, as shown in fig. 12, fig. 12 is a schematic flowchart of another display method provided in the embodiment of the present invention, where the display method further includes:
step S4: whether the target gray scales G1 of the N sub-pixels in the preset area are all smaller than the preset gray scale is judged. When the target gray levels G1 of the N sub-pixels in the preset region are all smaller than the preset gray level, step S5 is performed.
Step S5: and judging whether the sub-pixel display periods of the N sub-pixels are equal or not. When at least a first sub-pixel and a second sub-pixel having different sub-pixel display periods exist in the N sub-pixels, step S6 is performed.
Step S6: let the area display period T2 of the predetermined area be the least common multiple of the sub-pixel display period T11 of the first sub-pixel and the sub-pixel display period T12 of the second sub-pixel. The embodiment of the invention can enable the first sub-pixel 101 and the second sub-pixel 102 to accurately display the respective lower target gray levels.
Exemplarily, as shown in fig. 13, fig. 13 is a schematic flowchart of a further display method provided in an embodiment of the present invention, where the display method further includes:
step S4: whether the target gray scales G1 of the N sub-pixels in the preset area are all smaller than the preset gray scale is judged. When the target gray levels G1 of the N sub-pixels in the preset region are all smaller than the preset gray level, step S7 is performed.
Step S7: at any time in the area display period T2 of the preset area, enabling N1 sub-pixels in the preset area to emit light and N2 sub-pixels to not emit light; n1+ N2, N1 is a positive integer, and N2 is an integer greater than or equal to 0, so as to avoid that all sub-pixels in a preset area do not emit light at a certain time, and a large area shows a dark state.
For example, as shown in fig. 14, fig. 14 is a flowchart illustrating a further display method according to an embodiment of the present invention, where in the step S7, at any time in the region display period T2 of the preset region, N1 sub-pixels in the preset region emit light, and N2 sub-pixels do not emit light, the method includes:
step S71: whether the target gray scales G1 of the N sub-pixels in the preset area are equal is judged. When the target grayscales G1 of the N sub-pixels in the preset region are all smaller than and equal to the preset grayscales, step S72 is performed.
Step S72: at any time in the area display period T2 of the preset area, N1 sub-pixels are caused to emit light at the same reticle gray level G0. Namely, the N sub-pixels are displayed by selecting the same mother board gray scale and sub-pixel display period, so as to simplify the operation.
For example, as shown in fig. 15, fig. 15 is a flowchart illustrating a further display method according to an embodiment of the present invention, where in the step S7, at any time in the region display period T2 of the preset region, N1 sub-pixels in the preset region emit light, and N2 sub-pixels do not emit light, the method includes:
step S71: whether the target gray scales G1 of the N sub-pixels in the preset area are equal is judged. When the target grayscales G1 of the N sub-pixels in the preset region are all smaller than and equal to the preset grayscales, step S73 is performed.
Step S73: at any time in the area display period T2 of the preset area, at least two sub-pixels in N1 sub-pixels are made to emit light with different master gray scales G0, wherein N1 is larger than or equal to 2.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (16)
1. A display device, comprising:
a display panel including a plurality of sub-pixels;
an acquisition unit configured to acquire image data including a target grayscale corresponding to the sub-pixel;
the judgment unit is used for judging whether the target gray scale of the sub-pixel is smaller than a preset gray scale or not;
the processing unit is used for enabling the sub-pixels to emit light according to the master gray scale in the light emitting time period in one sub-pixel display period according to the first mapping relation and the second mapping relation, and enabling the sub-pixels not to emit light in the non-light emitting time period; wherein M1 and M2 are both positive integers;
the mother plate gray scale is greater than or equal to the preset gray scale;
the basis for determining the second mapping relation between the second brightness and the gray scale of the mother plate and the display period of the sub-pixels comprises the following steps:
in one sub-pixel display period, the absolute value of the difference between the value of the second brightness of the sub-pixel emitting light with the master gray scale in the light emitting time period and the value of the first brightness of the sub-pixel continuously emitting light with the target gray scale in one sub-pixel display period is less than or equal to a preset threshold value.
2. The display device according to claim 1,
the processing unit is further configured to alternate the non-light emitting period and the light emitting period.
3. The display device according to claim 1,
the processing unit is further configured to continuously perform M1 of the light emitting periods and M2 of the non-light emitting periods.
4. The display device according to claim 1,
the judgment unit is further used for judging whether the target gray scales of the N sub-pixels in the preset area are all smaller than the preset gray scale.
5. The display device according to claim 4,
when the target gray scales of the N sub-pixels in the preset area are all smaller than the preset gray scale, the judging unit is further used for judging whether the sub-pixel display periods of the N sub-pixels are equal or not;
when at least a first sub-pixel and a second sub-pixel with different sub-pixel display periods exist in the N sub-pixels, the processing unit is further configured to make an area display period T2 of the preset area be a least common multiple of the sub-pixel display period T11 of the first sub-pixel and the sub-pixel display period T12 of the second sub-pixel.
6. The display device according to claim 4,
when the target gray scales of the N sub-pixels in the preset region are all smaller than the preset gray scale, at any time in a region display period T2 of the preset region, the processing unit is further configured to make the N1 sub-pixels in the preset region emit light, and the N2 sub-pixels do not emit light; wherein N is N1+ N2, N1 is a positive integer, and N2 is an integer of 0 or more.
7. The display device according to claim 4,
when the target gray scales of the N sub-pixels in the preset area are all smaller than the preset gray scale, the judging unit is further used for judging whether the target gray scales of the N sub-pixels in the preset area are equal or not;
when the target gray scales of the N sub-pixels in the preset region are all smaller than and equal to the preset gray scale, at any time in a region display period T2 of the preset region, the processing unit is further configured to make the N1 sub-pixels emit light with the same mother plate gray scale.
8. The display device according to claim 4,
when the target gray scales of the N sub-pixels in the preset area are all smaller than the preset gray scale, the judging unit is further used for judging whether the target gray scales of the N sub-pixels in the preset area are equal or not;
when the target gray scales of the N sub-pixels in the preset region are all smaller than and equal to the preset gray scale, at any time in a region display period T2 of the preset region, the processing unit is further configured to make at least two of the N1 sub-pixels emit light with different mother plate gray scales, where N1 is greater than or equal to 2.
9. The display device according to claim 1,
the processing unit is further configured to enable the sub-pixel display period to be the display time of at least one frame of picture.
10. The display device according to claim 1,
and when the target gray scale of the sub-pixel is greater than or equal to the preset gray scale, the processing unit is further used for enabling the sub-pixel to emit light with the target gray scale in one sub-pixel display period.
11. A display method, comprising:
acquiring image data, wherein the image data comprises a target gray scale corresponding to a sub-pixel;
judging whether the target gray scale of the sub-pixel is smaller than a preset gray scale or not;
when the target gray scale is smaller than the preset gray scale, according to a first mapping relation between first brightness and the target gray scale and a second mapping relation between second brightness and a mother board gray scale and a sub-pixel display period, wherein the sub-pixel display period comprises M1 light-emitting time periods and M2 non-light-emitting time periods, in the light-emitting time period in one sub-pixel display period, the sub-pixel is made to emit light in the mother board gray scale, and in the non-light-emitting time period, the sub-pixel is made not to emit light; wherein M1 and M2 are both positive integers;
the mother plate gray scale is greater than or equal to the preset gray scale;
the basis for determining the second mapping relation between the second brightness and the gray scale of the mother plate and the display period of the sub-pixels comprises the following steps:
in one sub-pixel display period, the absolute value of the difference between the value of the second brightness of the sub-pixel emitting light with the master gray scale in the light emitting time period and the value of the first brightness of the sub-pixel continuously emitting light with the target gray scale in one sub-pixel display period is less than or equal to a preset threshold value.
12. The display method according to claim 11, further comprising:
judging whether the target gray scales of the N sub-pixels in a preset area are all smaller than the preset gray scale or not;
when the target gray scales of the N sub-pixels in the preset area are all smaller than the preset gray scale, judging whether the sub-pixel display periods of the N sub-pixels are equal or not;
when at least a first sub-pixel and a second sub-pixel with different sub-pixel display periods exist in the N sub-pixels, the region display period T2 of the preset region is made to be the least common multiple of the sub-pixel display period T1 of the first sub-pixel and the sub-pixel display period T2 of the second sub-pixel.
13. The display method according to claim 11, further comprising:
judging whether the target gray scales of the N sub-pixels in a preset area are all smaller than the preset gray scale or not;
when the target gray scales of the N sub-pixels in the preset area are all smaller than the preset gray scale, enabling the N1 sub-pixels in the preset area to emit light and the N2 sub-pixels to not emit light at any time in an area display period T2 of the preset area; wherein N is N1+ N2, N1 is a positive integer, and N2 is an integer of 0 or more.
14. The display method according to claim 13,
at any time in the area display period T2 of the preset area, making N1 sub-pixels in the preset area emit light and N2 sub-pixels do not emit light includes:
judging whether the target gray scales of the N sub-pixels in the preset area are equal or not;
when the target gray scales of the N sub-pixels in the preset area are all smaller than and equal to the preset gray scale, at any time in an area display period T2 of the preset area, the N1 sub-pixels are enabled to emit light with the same mother board gray scale.
15. The display method according to claim 13,
at any time in the area display period T2 of the preset area, making N1 sub-pixels in the preset area emit light and N2 sub-pixels do not emit light includes:
judging whether the target gray scales of the N sub-pixels in the preset area are equal or not;
when the target gray scales of the N sub-pixels in the preset area are all smaller than and equal to the preset gray scale, at any time in an area display period T2 of the preset area, at least two sub-pixels in the N1 sub-pixels emit light with different mother board gray scales, wherein N1 is not less than 2.
16. The display method according to claim 11, further comprising:
and when the target gray scale of the sub-pixel is more than or equal to the preset gray scale, in one sub-pixel display period, enabling the sub-pixel to emit light according to the target gray scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911054267.8A CN110728944B (en) | 2019-10-31 | 2019-10-31 | Display device and display method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911054267.8A CN110728944B (en) | 2019-10-31 | 2019-10-31 | Display device and display method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110728944A true CN110728944A (en) | 2020-01-24 |
| CN110728944B CN110728944B (en) | 2022-09-09 |
Family
ID=69223566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911054267.8A Active CN110728944B (en) | 2019-10-31 | 2019-10-31 | Display device and display method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110728944B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899690A (en) * | 2020-08-18 | 2020-11-06 | 昇显微电子(苏州)有限公司 | Method and device for improving low-brightness Mura |
| CN111933082A (en) * | 2020-09-03 | 2020-11-13 | 京东方科技集团股份有限公司 | Method for improving low gray scale image quality and display device |
| CN112669751A (en) * | 2020-12-28 | 2021-04-16 | 上海天马有机发光显示技术有限公司 | Display control method and device of display panel and display equipment |
| CN115641814A (en) * | 2022-10-31 | 2023-01-24 | 武汉天马微电子有限公司 | Display device and driving method thereof |
| CN116403527A (en) * | 2023-02-27 | 2023-07-07 | 苇创微电子(上海)有限公司 | Dynamic display smear compensation device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329846A (en) * | 2008-07-14 | 2008-12-24 | 上海广电光电子有限公司 | Method for modulating color temperature of LCD |
| JP2009223345A (en) * | 2009-07-08 | 2009-10-01 | Sharp Corp | Image processing method and liquid crystal display device using the same |
| CN107845370A (en) * | 2016-09-21 | 2018-03-27 | 北京京东方专用显示科技有限公司 | A kind of display methods of display panel, display panel and display device |
| CN108573678A (en) * | 2017-03-10 | 2018-09-25 | 昆山国显光电有限公司 | A kind of display methods and device |
| CN109545128A (en) * | 2017-09-22 | 2019-03-29 | 上海和辉光电有限公司 | A kind of method and OLED display panel improving low ash rank colour cast |
| CN109658864A (en) * | 2018-12-27 | 2019-04-19 | 厦门天马微电子有限公司 | A kind of display panel display processing method and display processing unit |
-
2019
- 2019-10-31 CN CN201911054267.8A patent/CN110728944B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329846A (en) * | 2008-07-14 | 2008-12-24 | 上海广电光电子有限公司 | Method for modulating color temperature of LCD |
| JP2009223345A (en) * | 2009-07-08 | 2009-10-01 | Sharp Corp | Image processing method and liquid crystal display device using the same |
| CN107845370A (en) * | 2016-09-21 | 2018-03-27 | 北京京东方专用显示科技有限公司 | A kind of display methods of display panel, display panel and display device |
| CN108573678A (en) * | 2017-03-10 | 2018-09-25 | 昆山国显光电有限公司 | A kind of display methods and device |
| CN109545128A (en) * | 2017-09-22 | 2019-03-29 | 上海和辉光电有限公司 | A kind of method and OLED display panel improving low ash rank colour cast |
| CN109658864A (en) * | 2018-12-27 | 2019-04-19 | 厦门天马微电子有限公司 | A kind of display panel display processing method and display processing unit |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899690A (en) * | 2020-08-18 | 2020-11-06 | 昇显微电子(苏州)有限公司 | Method and device for improving low-brightness Mura |
| CN111933082A (en) * | 2020-09-03 | 2020-11-13 | 京东方科技集团股份有限公司 | Method for improving low gray scale image quality and display device |
| US11562691B2 (en) | 2020-09-03 | 2023-01-24 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Gray scale display method |
| CN112669751A (en) * | 2020-12-28 | 2021-04-16 | 上海天马有机发光显示技术有限公司 | Display control method and device of display panel and display equipment |
| CN112669751B (en) * | 2020-12-28 | 2023-06-02 | 武汉天马微电子有限公司 | Display control method and device of display panel and display equipment |
| CN115641814A (en) * | 2022-10-31 | 2023-01-24 | 武汉天马微电子有限公司 | Display device and driving method thereof |
| CN115641814B (en) * | 2022-10-31 | 2024-06-04 | 武汉天马微电子有限公司 | Display device and driving method thereof |
| CN116403527A (en) * | 2023-02-27 | 2023-07-07 | 苇创微电子(上海)有限公司 | Dynamic display smear compensation device and method |
| CN116403527B (en) * | 2023-02-27 | 2024-04-16 | 苇创微电子(上海)有限公司 | Dynamic display smear compensation device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110728944B (en) | 2022-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110728944B (en) | Display device and display method | |
| CN108630148B (en) | Method for compensating brightness difference of display panel and display | |
| CN108962126B (en) | Display panel driving method and system and display device comprising same | |
| KR101433108B1 (en) | AMOLED and driving method thereof | |
| TWI241138B (en) | Method for displaying images on electroluminescence devices with stressed pixels | |
| CN102483899B (en) | Image display device and image display method | |
| TWI389077B (en) | Organic light emitting diode display device and driving method thereof | |
| CN110473493B (en) | Display panel driving method and display device | |
| US9514709B2 (en) | Methods of correcting gamma and display device employing the same | |
| CN112005292B (en) | Method for sensing light | |
| JP5734580B2 (en) | Pixel data correction method and display device for performing the same | |
| JP2010020078A (en) | Display device and its driving method | |
| CN111754935B (en) | Display panel compensation method and device and display device | |
| US12014691B2 (en) | Device and method for driving display panel and display device | |
| CN109785792B (en) | Display panel driving method and device and display device | |
| TWI669694B (en) | Display device and image data correction method | |
| CN110784701B (en) | Display apparatus and image processing method thereof | |
| CN110767162B (en) | Display compensation method and device, computer readable storage medium and computer equipment | |
| CN109872668B (en) | Image display total current prediction method, display device and storage medium | |
| CN111340730B (en) | Method for eliminating smear phenomenon, terminal and storage medium | |
| CN104637449B (en) | The method for driving active matrix organic LED panel | |
| JP2009251069A (en) | Flicker detector, lighting condition setting device, display panel, electronic equipment, and flicker detection method | |
| TW201407574A (en) | Display apparatus and image control method thereof | |
| CN110189727B (en) | Driving method and driving device of display panel and display device | |
| CN114170976A (en) | Display brightness adjusting method and device, electronic equipment and computer readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |