CN110706659B - Display compensation method, display and display device - Google Patents
Display compensation method, display and display device Download PDFInfo
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- CN110706659B CN110706659B CN201911013768.1A CN201911013768A CN110706659B CN 110706659 B CN110706659 B CN 110706659B CN 201911013768 A CN201911013768 A CN 201911013768A CN 110706659 B CN110706659 B CN 110706659B
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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
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The invention discloses a compensation method of a display, the display and a display device, wherein the backlight area of a backlight source is divided into a plurality of backlight sub-areas according to the light leakage degree of the display area of a liquid crystal display panel, each backlight sub-area corresponds to one light leakage grade, and then the lumen value of an LED in each backlight sub-area is set according to the light leakage grade corresponding to the backlight sub-area, wherein the more serious the light leakage of the display area of the liquid crystal display panel is, the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control sub-area in the backlight sub-area corresponding to a disposal place is, namely the lower the LED brightness of each circuit control sub-area in the backlight sub-area corresponding to the disposal place is, so that the LED brightness of the backlight sub-area at the corresponding position is gradually reduced according to the light leakage degree of the.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a compensation method for a display, a display and a display device.
Background
Curved displays (Curved displays) are Curved designs in which the entire screen is Curved toward the viewer, providing a wide viewing angle and a wide panoramic image effect, and reducing off-axis viewing distortion when viewing at close range.
However, in the curved display, the liquid crystal is unevenly distributed due to the stress and the pull of the liquid crystal display panel at the bend, so that the light leakage phenomenon occurs at the bend.
Disclosure of Invention
The embodiment of the invention provides a compensation method of a display, the display and a display device, which are used for improving the light leakage problem in the prior art.
The embodiment of the invention provides a compensation method of a display, wherein the display comprises a liquid crystal display panel and a backlight source for providing backlight for the liquid crystal display panel; the backlight area of the backlight source comprises a plurality of circuit control sub-areas, and each circuit control sub-area comprises at least one LED; the compensation method comprises the following steps:
dividing the backlight area of the backlight source into a plurality of backlight sub-areas corresponding to a plurality of light leakage levels according to the light leakage degree of the display area of the liquid crystal display panel, wherein each backlight sub-area corresponds to one light leakage level, and each backlight sub-area comprises at least one circuit control sub-area;
setting the lumen value of the LED in the backlight subarea according to the light leakage grade corresponding to the backlight subarea;
the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control subarea in the corresponding backlight subarea is, and the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding disposal place is; in the corresponding backlight subareas with the same light leakage grade, the average lumen value of the LED of each circuit control subarea is the same; the average lumen value of the LEDs in the circuit control sub-area is equal to the sum of the lumen values of all the LEDs in the circuit control sub-area divided by the number of LEDs.
Correspondingly, the embodiment of the invention also provides a display, which comprises a liquid crystal display panel and a backlight source for providing backlight for the liquid crystal display panel; the backlight area of the backlight source comprises a plurality of circuit control sub-areas, and each circuit control sub-area comprises at least one LED;
the backlight area of the backlight source is divided into a plurality of backlight sub-areas corresponding to a plurality of light leakage grades according to the light leakage degree of the display area of the liquid crystal display panel, each backlight sub-area corresponds to one light leakage grade, and each backlight sub-area comprises at least one circuit control sub-area;
the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control subarea in the corresponding backlight subarea is, and the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding disposal is; in the corresponding backlight subareas with the same light leakage grade, the average lumen value of the LED of each circuit control subarea is the same; wherein the average lumen value of the LEDs in the circuit control sub-area is equal to the sum of the lumen values of all the LEDs in the circuit control sub-area divided by the number of LEDs.
Correspondingly, the embodiment of the invention also provides a display device which comprises any one of the displays provided by the embodiment of the invention.
The invention has the following beneficial effects:
according to the compensation method of the display, the display and the display device provided by the embodiment of the invention, the backlight area of the backlight source is divided into a plurality of backlight sub-areas according to the light leakage degree of the display area of the liquid crystal display panel, each backlight sub-area corresponds to one light leakage grade, and then the lumen value of the LED in the backlight sub-area is set according to the light leakage grade corresponding to the backlight sub-area, wherein the more serious the light leakage of the display area of the liquid crystal display panel is, the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control sub-area in the backlight sub-area corresponding to the disposal place is, namely the lower the LED brightness of each circuit control sub-area in the backlight sub-area corresponding to the disposal place is, so that the LED brightness of the backlight sub-area at the corresponding position is gradually reduced according to the light.
Drawings
Fig. 1 is a schematic structural diagram of a display according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a backlight according to an embodiment of the present invention;
fig. 3 is a schematic partial structure diagram of a backlight according to another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a circuit control sub-region in a backlight according to an embodiment of the present invention;
FIG. 5 is a flowchart of a compensation method according to an embodiment of the present invention;
FIG. 6 is a flow chart of a compensation method according to another embodiment of the present invention;
FIG. 7 is a flowchart of a compensation method according to another embodiment of the present invention;
FIG. 8 is a flowchart illustrating a process of displaying on a liquid crystal display panel according to a compensation method according to another embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a display according to another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
The following describes a compensation method for a display, a display and a display device according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a display according to an embodiment of the present invention, where fig. 1 is a schematic diagram of a structure of the display according to the embodiment of the present invention; the display includes a liquid crystal display panel 01 and a backlight 02 for providing backlight to the liquid crystal display panel 01; as shown in fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a backlight according to an embodiment of the present invention; fig. 3 is a schematic partial structure diagram of a backlight according to another embodiment of the present disclosure; the backlight area of the backlight source 02 includes a plurality of circuit control sub-areas 020 (one dashed line box in fig. 2 and fig. 3 represents one circuit control sub-area), as shown in fig. 4, fig. 4 is a schematic structural diagram of the circuit control sub-areas in the backlight source according to an embodiment of the present invention; each circuit control sub-area 020 includes at least one Light Emitting Diode (LED); as shown in fig. 5, fig. 5 is a flowchart of a compensation method according to an embodiment of the invention; the compensation method comprises the following steps:
s101, dividing a backlight area of a backlight source into a plurality of backlight sub-areas corresponding to a plurality of light leakage levels according to the light leakage degree of a display area of a liquid crystal display panel, wherein each backlight sub-area corresponds to one light leakage level and comprises at least one circuit control sub-area;
as shown in fig. 2 and 3, the backlight area of the backlight source 02 is divided into a plurality of backlight sub-areas a 1-An (one backlight sub-area is indicated by a filling color in one of fig. 2 and 3), where n ═ 4 is taken as An example in fig. 2 and 3, and each backlight sub-area An corresponds to a light leakage level; wherein, the higher the light leakage grade is, the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding disposal position is. For example, in fig. 2, the smaller n is, the more serious the light leakage degree corresponding to the backlight sub-region An is, that is, the more serious the light leakage degree corresponding to the backlight sub-region a1 is, the less the light leakage degree corresponding to the backlight sub-region a2 is than the light leakage degree corresponding to the backlight sub-region a1, the less the light leakage degree corresponding to the backlight sub-region A3 is than the light leakage degree corresponding to the backlight sub-region a2, and the region corresponding to the backlight sub-region a4 is a region without light leakage.
S102, setting a lumen value of an LED in the backlight subarea according to the light leakage grade corresponding to the backlight subarea; the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control subarea in the corresponding backlight subarea is, and the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding disposal part is;
in the corresponding backlight subareas with the same light leakage grade, the average lumen value of the LEDs of each circuit control subarea is the same; the average lumen value of the LEDs in the circuit control sub-area is equal to the sum of the lumen values of all the LEDs in the circuit control sub-area divided by the number of LEDs.
Specifically, the smaller the lumen value of the LED, the lower the brightness of the LED at the same current. Taking fig. 2 and fig. 3 as An example, the more serious the light leakage degree corresponding to the backlight sub-region An is, the smaller the average lumen value of the LEDs in each circuit control sub-region in the backlight sub-region An is, that is, the display brightness of the liquid crystal display panel is compensated by reducing the LED brightness of the backlight sub-region An corresponding to the region with the serious light leakage degree of the liquid crystal display panel, so as to improve the light leakage problem of the display.
According to the compensation method of the display provided by the embodiment of the invention, the backlight area of the backlight source is divided into a plurality of backlight sub-areas according to the light leakage degree of the display area of the liquid crystal display panel, each backlight sub-area corresponds to one light leakage grade, and then the lumen value of the LED in the backlight sub-area is set according to the light leakage grade corresponding to the backlight sub-area, wherein the more serious the light leakage of the display area of the liquid crystal display panel is, the higher the light leakage grade is, the smaller the average lumen value of the LED in each circuit control sub-area in the backlight sub-area corresponding to the disposal is, namely, the lower the LED brightness of each circuit control sub-area in the backlight sub-area corresponding to the disposal is, so that the LED brightness of the backlight sub-area at the corresponding position is gradually reduced according to the light leakage.
In practical implementation, in the compensation method provided by the embodiment of the present invention, the lumen values of the LEDs in the same circuit control sub-area may be the same, that is, the brightness of the LEDs in the circuit control sub-area is uniformly distributed. Certainly, in the compensation method provided by the embodiment of the present invention, in the same circuit control sub-area, the lumen values of the LEDs may not be completely the same, and according to the light leakage condition of the liquid crystal display panel at the position corresponding to the circuit control sub-area, the more serious the light leakage is, the smaller the lumen value of the LED is, so as to further improve the uniformity of the display.
Optionally, in the compensation method provided in the embodiment of the present invention, as shown in fig. 6, fig. 6 is a flowchart of a compensation method provided in another embodiment of the present invention; before dividing the backlight area of the backlight source into a plurality of backlight sub-areas corresponding to a plurality of light leakage levels according to the light leakage degree of the display area of the liquid crystal display panel in step S101, the method further comprises:
s103, performing light leakage detection on the liquid crystal display panel to determine a light leakage position and a corresponding light leakage grade.
In specific implementation, the light leakage position and the corresponding light leakage grade can be set according to the light leakage condition of the liquid crystal display panel, for example, the light leakage is serious, a plurality of light leakage grades can be set, the display uniformity is ensured through gradual transition, otherwise, the light leakage is light, and the grade number of the light leakage can be reduced.
In specific implementation, the brightness of the LED is determined by the lumen value and the driving current of the LED, and under the condition of the same driving current, the larger the lumen value is, the higher the brightness of the LED is; the larger the drive current, the higher the brightness of the LED for the same lumen value. Therefore, in the compensation method provided by the embodiment of the present invention, the backlight source may adopt a Local Dimming (Local Dimming) technique, that is, each circuit control sub-region in the backlight source corresponds to one driving current control circuit, the driving currents of the LEDs in the same circuit control sub-region are the same, and the driving currents of the LEDs in different circuit control sub-regions may be respectively controlled, so that the light leakage of the liquid crystal display panel may be further compensated by adjusting the current values of the LEDs in the backlight sub-region according to the light leakage condition of the liquid crystal display panel.
Further, the current value of the LED in the sub-area of the circuit control is adjusted by adjusting a weighted value of Pulse Width Modulation (PWM), and the larger the weighted value is, the larger the current value of the LED in the corresponding sub-area of the circuit control is, the larger the brightness of the LED is.
Optionally, in the compensation method provided in the embodiment of the present invention, as shown in fig. 7, fig. 7 is a flowchart of a compensation method provided in another embodiment of the present invention; further comprising:
s104, aiming at each backlight subarea, adjusting the pulse width modulation weighted value of each circuit control subarea in the backlight subarea according to the corresponding light leakage grade; the higher the corresponding light leakage grade is, the smaller the pulse width modulation weighted value of each circuit control sub-area in the backlight sub-area is, and the same pulse width modulation weighted value of each circuit control sub-area in the same backlight sub-area is;
and S105, driving the LED corresponding to each circuit control sub-area according to the pulse width modulation weighting value of each circuit control sub-area.
The embodiment of the invention provides the compensation method, according to the light leakage condition of the liquid crystal display panel, on the basis of adjusting the LED lumen value in the backlight source, by combining the Local Dimming technology, aiming at each backlight subarea, the pulse width modulation weighted value of each circuit control subarea in the backlight subarea is adjusted according to the corresponding light leakage grade, wherein the higher the corresponding light leakage grade is, the smaller the pulse width modulation weighted value of each circuit control subarea in the backlight subarea is, so that the brightness of each backlight subarea can be more finely adjusted by adjusting the LED lumen value and the driving current value, the light leakage of different grades is more accurately compensated, and the uniformity of display is further ensured.
Optionally, in the compensation method provided in the embodiment of the present invention, in order to facilitate control of the driving current of each circuit control sub-area, the number of LEDs included in each circuit control sub-area is the same. Of course, in specific implementation, the number of LEDs included in each circuit control sub-area may also be different, and is not limited herein.
Further, in the compensation method provided in the embodiment of the present invention, when the number of LEDs included in each circuit control sub-region is the same, the shape of each circuit control sub-region may be the same or different, and is not limited herein.
Optionally, in the compensation method provided in the embodiment of the present invention, the shape of the circuit control sub-area may be a regular shape such as a square, a rectangle, a circle, or an irregular shape, which is not limited herein.
Specifically, in the compensation method provided in the embodiment of the present invention, the shape of the circuit control sub-region may be designed according to the light leakage condition of the liquid crystal display panel, for example, where four corners of the liquid crystal display panel are located, the closer to the corners, the more serious the light leakage is, referring to fig. 2 and fig. 3, the shape of the circuit control sub-region 020 is square or rectangular, and the shape of the backlight sub-region An formed by one or more circuit control sub-regions 020 may be square or rectangular correspondingly.
Optionally, in the compensation method provided in the embodiment of the present invention, the method further includes: fig. 8 shows a process of displaying on a liquid crystal display panel, where fig. 8 is a flowchart of displaying on a liquid crystal display panel in a compensation method according to another embodiment of the present invention; the method comprises the following steps:
s201, receiving original data of a frame image to be displayed;
s202, performing gray scale compensation on original data corresponding to sub-pixels of different display sub-regions to generate target data of a frame image to be displayed; for the display subareas with the same light leakage grade, the compensation values of the same original data are the same; the higher the light leakage grade corresponding to the display sub-region is, the larger the compensation value of the same original data is;
and S203, displaying according to the target data of the frame image to be displayed.
The compensation method provided by the embodiment of the invention further combines pixel compensation on the basis of backlight compensation, namely, gray scale compensation is carried out on the original data corresponding to the sub-pixels of different display sub-regions to generate target data of a frame image to be displayed; for the display subareas with the same light leakage grade, the compensation values of the same original data are the same; the higher the light leakage level corresponding to the display sub-region is, the larger the compensation value of the same original data is. This is because the pixel compensation is adopted to make the compensation accuracy finer, and further ensure the uniformity of the display.
In the implementation, the light leakage problem can be solved by compensating the backlight source, but when the light leakage is serious or the display quality requirement is high, the pixel compensation can be used for finer compensation based on the backlight compensation.
In specific implementation, gray scale compensation is performed on original data corresponding to sub-pixels of different display sub-regions, for display sub-regions with the same light leakage level, compensation values of the same original data are the same, and the higher the light leakage level corresponding to the display sub-regions is, the larger the compensation value of the same original data is. For example, for the sub-pixels in the same sub-area of the display area, it is assumed that the original data is 128 gray scale, the compensated data is 125 gray scale, the original data is 64 gray scale, and the compensated data is 63 gray scale. For the sub-pixels with the light leakage degree larger than that of the display sub-region, it is assumed that the original data is 128 gray scale, and the display brightness needs to be reduced due to the serious light leakage, so that the compensated gray scale is smaller than 125 gray scale, and similarly, the original data is 64 gray scale, and the compensated gray scale is smaller than 63 gray scale, and the compensation value is selected only for illustration and is specifically determined according to the actual display condition.
Based on the same inventive concept, embodiments of the present invention further provide a display, as shown in fig. 1 to 3, the display includes a liquid crystal display panel 01 and a backlight 02 for providing backlight for the liquid crystal display panel 01; the backlight area of the backlight source 02 comprises a plurality of circuit control subregions 020, and each circuit control subregion 020 comprises at least one LED;
the backlight area of the backlight source 02 is divided into a plurality of backlight sub-areas An corresponding to a plurality of light leakage levels according to the light leakage degree of the display area of the liquid crystal display panel 01, each backlight sub-area An corresponds to one light leakage level, and each backlight sub-area An comprises at least one circuit control sub-area 020;
the higher the light leakage grade is, the smaller the average lumen value of the LEDs in each circuit control sub-region 020 in the corresponding backlight sub-region An is, the more serious the light leakage in the display region of the liquid crystal display panel 01 corresponding to the disposal is; in the corresponding backlight sub-regions An with the same light leakage grade, the average lumen value of the LEDs of the circuit control sub-regions 020 is the same; wherein the average lumen value of the LEDs of the circuit control sub-area 020 is equal to the sum of the lumen values of all the LEDs within the circuit control sub-area 020 divided by the number of LEDs.
In the display provided by the embodiment of the invention, the backlight area of the backlight source is divided into a plurality of backlight sub-areas corresponding to a plurality of light leakage grades according to the light leakage degree of the display area of the liquid crystal display panel, each backlight sub-area corresponds to one light leakage grade, the more serious the light leakage of the display area of the liquid crystal display panel is, the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control sub-area in the backlight sub-area corresponding to the disposal position is, namely, the lower the LED brightness of each circuit control sub-area in the backlight sub-area corresponding to the disposal position is, so that the LED brightness of the backlight sub-area at the corresponding position is gradually reduced according to the light leakage degree of the liquid crystal display panel, the.
Optionally, in the display provided in the embodiment of the present invention, as shown in fig. 9, fig. 9 is a schematic structural diagram of the display provided in another embodiment of the present invention; further comprising: a backlight control unit 03;
the backlight control unit 03 is configured to: aiming at each backlight subarea, adjusting the pulse width modulation weighted value of each circuit control subarea in the backlight subarea according to the corresponding light leakage grade; the higher the corresponding light leakage grade is, the smaller the pulse width modulation weighted value of each circuit control sub-area in the backlight sub-area is, and the same pulse width modulation weighted value of each circuit control sub-area in the same backlight sub-area is.
The embodiment of the invention provides the display, according to the light leakage condition of the liquid crystal display panel, on the basis of adjusting the lumen value of the LED in the backlight source, and in combination with the Local Dimming technology, the backlight control unit adjusts the pulse width modulation weighted value of each circuit control sub-region in the backlight sub-region according to the corresponding light leakage level for each backlight sub-region, wherein the higher the corresponding light leakage level is, the smaller the pulse width modulation weighted value of each circuit control sub-region in the backlight sub-region is, so that the brightness of each backlight sub-region can be adjusted more finely by adjusting the lumen value of the LED and the driving current value, thereby compensating the light leakage of different levels more accurately and further ensuring the uniformity of the display.
Optionally, in the display provided in the embodiment of the present invention, when the liquid crystal display panel performs display, as shown in fig. 8, the display includes:
s201, receiving original data of a frame image to be displayed;
s202, performing gray scale compensation on original data corresponding to sub-pixels of different display sub-regions to generate target data of a frame image to be displayed; for the display subareas with the same light leakage grade, the compensation values of the same original data are the same; the higher the light leakage grade corresponding to the display sub-region is, the larger the compensation value of the same original data is;
and S203, displaying according to the target data of the frame image to be displayed.
The display provided by the embodiment of the invention further combines pixel compensation on the basis of backlight compensation, namely, gray scale compensation is carried out on the original data corresponding to the sub-pixels of different display sub-regions to generate target data of a frame image to be displayed; for the display subareas with the same light leakage grade, the compensation values of the same original data are the same; the higher the light leakage level corresponding to the display sub-region is, the larger the compensation value of the same original data is. This is because the pixel compensation is adopted to make the compensation accuracy finer, and further ensure the uniformity of the display.
In practical implementation, in the display provided by the embodiment of the present invention, the lumen values of the LEDs in the same circuit control sub-area may be the same, that is, the brightness of the LEDs in the circuit control sub-area is uniformly distributed. Of course, the lumen values of the LEDs in the same circuit control sub-area may not be completely the same, and are not limited herein.
Optionally, when the lumen values of the LEDs in the same circuit control sub-region are not completely the same, the lumen value of the LED is smaller at a place where light leakage is more serious according to the light leakage condition of the liquid crystal display panel at the corresponding position of the circuit control sub-region, thereby further improving the uniformity of display.
Optionally, in the display provided in the embodiment of the present invention, in order to facilitate control of the driving current of each circuit control sub-area, the number of LEDs included in each circuit control sub-area is the same. Of course, in specific implementation, the number of LEDs included in each circuit control sub-area may also be different, and is not limited herein.
Further, in the display provided in the embodiment of the present invention, when the number of LEDs included in each circuit control sub-area is the same, the shape of each circuit control sub-area may be the same or different, and is not limited herein.
Alternatively, in the display provided in the embodiment of the present invention, the shape of the circuit control sub-area may be a regular shape such as a square, a rectangle, a circle, or an irregular shape, which is not limited herein.
The display provided by the embodiment of the invention can be suitable for any display with light leakage problem, and certainly, for the curved display at present, the stress generated by the liquid crystal display panel at the bending part can cause the liquid crystal to be distributed unevenly, so that the light leakage phenomenon can be generated at the bending part. Therefore, the display provided by the embodiment of the invention is particularly suitable for curved displays.
Therefore, optionally, in the display provided in the embodiment of the present invention, as shown in fig. 1, the display is a curved display, such as a curved television, a curved mobile phone, a curved vehicle-mounted display screen, and the like.
In a specific implementation, in a display, a general liquid crystal display panel is rectangular, light leakage is the most serious at 4 top corners of the liquid crystal display panel, and the light leakage is the more serious in a region where a display area is closer to each top corner. Therefore, as shown in fig. 2 and fig. 3, the backlight area of the backlight source is sequentially divided into a plurality of backlight sub-areas An from the top angle to the center direction of the backlight area, and the display uniformity is ensured by gradually transitioning the brightness of each backlight sub-area An.
Based on the same inventive concept, embodiments of the present invention further provide a display device, including any one of the display devices provided in embodiments of the present invention. The display device may be: such as any product or component with display function like computer, mobile phone, digital photo frame, navigator of fig. 10. The implementation of the display device can be referred to the above embodiments of the display, and repeated descriptions are omitted.
According to the compensation method of the display, the display and the display device provided by the embodiment of the invention, the backlight area of the backlight source is divided into a plurality of backlight sub-areas according to the light leakage degree of the display area of the liquid crystal display panel, each backlight sub-area corresponds to one light leakage grade, and then the lumen value of the LED in the backlight sub-area is set according to the light leakage grade corresponding to the backlight sub-area, wherein the more serious the light leakage of the display area of the liquid crystal display panel is, the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control sub-area in the backlight sub-area corresponding to the disposal place is, namely the lower the LED brightness of each circuit control sub-area in the backlight sub-area corresponding to the disposal place is, so that the LED brightness of the backlight sub-area at the corresponding position is gradually reduced according to the light.
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 (13)
1. The compensation method of the display is characterized in that the display comprises a liquid crystal display panel and a backlight source for providing backlight for the liquid crystal display panel; the backlight area of the backlight source comprises a plurality of circuit control sub-areas, and each circuit control sub-area comprises at least one LED; the compensation method comprises the following steps:
dividing the backlight area of the backlight source into a plurality of backlight sub-areas corresponding to a plurality of light leakage levels according to the light leakage degree of the display area of the liquid crystal display panel, wherein each backlight sub-area corresponds to one light leakage level, and each backlight sub-area comprises at least one circuit control sub-area;
setting the lumen value of the LED in the backlight subarea according to the light leakage grade corresponding to the backlight subarea;
the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control subarea in the corresponding backlight subarea is, and the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding disposal place is; in the corresponding backlight subareas with the same light leakage grade, the average lumen value of the LED of each circuit control subarea is the same; the average lumen value of the LEDs in the circuit control sub-area is equal to the sum of the lumen values of all the LEDs in the circuit control sub-area divided by the number of LEDs.
2. The compensation method as claimed in claim 1, further comprising, before dividing the backlight region of the backlight source into a plurality of backlight sub-regions corresponding to a plurality of light leakage levels according to the degree of light leakage of the display region of the liquid crystal display panel:
and performing light leakage detection on the liquid crystal display panel to determine a light leakage position and the corresponding light leakage grade.
3. The compensation method of claim 1, further comprising:
aiming at each backlight subarea, adjusting the pulse width modulation weighted value of each circuit control subarea in the backlight subarea according to the corresponding light leakage grade; the higher the corresponding light leakage grade is, the smaller the pulse width modulation weighted value of each circuit control sub-area in the backlight sub-area is, and the same pulse width modulation weighted value of each circuit control sub-area in the same backlight sub-area is;
and driving the LED corresponding to each circuit control sub-area according to the pulse width modulation weighting value of each circuit control sub-area.
4. A compensation method according to any one of claims 1-3, further comprising: when the liquid crystal display panel displays:
receiving original data of a frame image to be displayed;
performing gray scale compensation on original data corresponding to sub-pixels of different display sub-regions to generate target data of a frame image to be displayed; for the display subareas with the same light leakage grade, the compensation values of the same original data are the same; the higher the light leakage grade corresponding to the display sub-region is, the larger the compensation value of the same original data is;
and displaying according to the target data of the frame image to be displayed.
5. The compensation method of claim 1 wherein the lumen values of each of said LEDs are the same within the same circuit control sub-region.
6. The compensation method of claim 1, wherein the lumen values of the LEDs are not identical within the same circuit control sub-region;
the smaller the lumen value of the LED is, the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding position is.
7. A display is characterized in that the display comprises a liquid crystal display panel and a backlight source for providing backlight for the liquid crystal display panel; the backlight area of the backlight source comprises a plurality of circuit control sub-areas, and each circuit control sub-area comprises at least one LED;
the backlight area of the backlight source is divided into a plurality of backlight sub-areas corresponding to a plurality of light leakage grades according to the light leakage degree of the display area of the liquid crystal display panel, each backlight sub-area corresponds to one light leakage grade, and each backlight sub-area comprises at least one circuit control sub-area;
the higher the light leakage grade is, the smaller the average lumen value of the LED of each circuit control subarea in the corresponding backlight subarea is, and the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding disposal is; in the corresponding backlight subareas with the same light leakage grade, the average lumen value of the LED of each circuit control subarea is the same; wherein the average lumen value of the LEDs in the circuit control sub-area is equal to the sum of the lumen values of all the LEDs in the circuit control sub-area divided by the number of LEDs.
8. The display of claim 7, further comprising: a backlight control unit;
the backlight control unit is configured to: aiming at each backlight subarea, adjusting the pulse width modulation weighted value of each circuit control subarea in the backlight subarea according to the corresponding light leakage grade; the higher the corresponding light leakage grade is, the smaller the pulse width modulation weighted value of each circuit control sub-area in the backlight sub-area is, and the same pulse width modulation weighted value of each circuit control sub-area in the same backlight sub-area is.
9. The display according to claim 7 or 8, wherein the liquid crystal display panel, when displaying, comprises:
receiving original data of a frame image to be displayed;
performing gray scale compensation on original data corresponding to sub-pixels of different display sub-regions to generate target data of a frame image to be displayed; for the display subareas with the same light leakage grade, the compensation values of the same original data are the same; the higher the light leakage grade corresponding to the display sub-region is, the larger the compensation value of the same original data is;
and displaying according to the target data of the frame image to be displayed.
10. The display as recited in claim 7, wherein each of said LEDs has the same lumen value within the same said circuit control sub-region.
11. The display as recited in claim 7 wherein said LEDs do not have exactly the same lumen value within the same said circuit control sub-region;
the smaller the lumen value of the LED is, the more serious the light leakage of the display area of the liquid crystal display panel at the corresponding position is.
12. The display of claim 7, wherein the display is a curved display.
13. A display device, characterized in that it comprises a display according to any one of claims 7-12.
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| US9035975B2 (en) * | 2009-10-14 | 2015-05-19 | Dolby Laboratories Licensing Corporation | Variable flower display backlight system |
| CN103912819A (en) * | 2012-12-31 | 2014-07-09 | 武汉天马微电子有限公司 | Backlight module and liquid crystal display device |
| KR102245366B1 (en) * | 2014-10-27 | 2021-04-28 | 엘지전자 주식회사 | Digital device and method for controlling the same |
| CN104375310B (en) * | 2014-11-03 | 2017-05-17 | 深圳市华星光电技术有限公司 | Hook face display panel and hook face display device |
| CN104409068B (en) * | 2014-12-12 | 2016-08-17 | 京东方科技集团股份有限公司 | A kind of luminance compensation method and curved-surface display device |
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| CN109727582A (en) * | 2017-10-31 | 2019-05-07 | 深圳富泰宏精密工业有限公司 | The bearing calibration of electronic device and its display screen |
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