CN112543967B - Display control device and method for acquiring light intensity distribution of backlight plate - Google Patents
Display control device and method for acquiring light intensity distribution of backlight plate Download PDFInfo
- Publication number
- CN112543967B CN112543967B CN202080003281.XA CN202080003281A CN112543967B CN 112543967 B CN112543967 B CN 112543967B CN 202080003281 A CN202080003281 A CN 202080003281A CN 112543967 B CN112543967 B CN 112543967B
- Authority
- CN
- China
- Prior art keywords
- light intensity
- backlight
- intensity distribution
- distribution information
- display
- 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.)
- Active
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
- G09G3/34—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
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
Abstract
The present disclosure relates to a display control device and a method for obtaining light intensity distribution of a backlight plate thereof, so as to solve the problems in the related art. The display control device comprises one or more integrated circuits; wherein the one or more integrated circuits comprise: the processing unit is used for determining light intensity distribution information corresponding to a backlight plate of the display according to data detected by the area array brightness detection device, and the area array brightness detection device is positioned in front of a screen of the display and used for detecting image data of the display when at least one backlight block of the backlight plate is lightened; the display main control circuit is used for receiving the image video signal and determining the initial transmittance of the display and the initial light intensity of the backlight plate according to the image video signal; and the adjusting circuit is used for adjusting the light intensity of the backlight plate according to the light intensity distribution information and adjusting the transmittance of the display, so that the product of the adjusted light intensity of the backlight plate and the adjusted transmittance of the display is equal to the product of the initial transmittance and the initial light intensity.
Description
Technical Field
The disclosure relates to the technical field of backlight displays, in particular to a display control device and a method for acquiring light intensity distribution of a backlight plate.
Background
A backlight display generally includes a backlight panel and a liquid crystal display panel (LCD). The liquid crystal display panel is composed of a color filter substrate having red, green and blue color filter patterns and a liquid crystal layer. The backlight plate is composed of Light Emitting Diodes (LEDs) or fluorescent light sources. The liquid crystal display panel itself does not have a light emitting property. The liquid crystal display panel is illuminated by the backlight and selectively filters a portion of the colors, thereby displaying images of different colors.
The currently commonly used backlight plate is an edge type backlight plate or a direct type backlight plate. In the related art, the light intensity distribution information of the entire backlight panel is acquired by lighting the LED lamps on the entire backlight panel, and the video image signal is processed based on the light intensity distribution information of the backlight panel to display the video image on the liquid crystal display panel. Because the light intensity distribution information of the backlight plate is obtained under the condition of lighting the LED lamps on the whole backlight plate, the backlight brightness of the backlight plate can not be dynamically adjusted along with the change of display contents, so that when the image display contents are dark, the light intensity utilization rate of the backlight plate is not high, and energy waste is caused. In addition, the transmittance of the lcd panel cannot be adjusted to 0%, which results in poor contrast when the lcd displays video images.
Disclosure of Invention
The present disclosure is directed to a display control device and a method for obtaining light intensity distribution of a backlight plate thereof, so as to solve the problems in the related art.
In order to achieve the above object, according to a first part of the embodiments of the present disclosure, there is provided a display control apparatus including one or more integrated circuits;
wherein the one or more integrated circuits comprise:
the backlight module comprises a processing unit, a backlight module and an area array brightness detection device, wherein the processing unit is used for determining light intensity distribution information corresponding to a backlight plate of a display according to data detected by the area array brightness detection device, and the area array brightness detection device is positioned in front of a screen of the display and is used for detecting image data of the display when at least one backlight block of the backlight plate is lightened;
the display main control circuit is used for receiving an image video signal and determining the initial transmittance of the display and the initial light intensity of the backlight plate according to the image video signal;
and the adjusting circuit is used for adjusting the light intensity of the backlight plate according to the light intensity distribution information and adjusting the transmittance of the display, so that the product of the adjusted light intensity of the backlight plate and the adjusted transmittance of the display is equal to the product of the initial transmittance and the initial light intensity.
According to a second aspect of the embodiments of the present disclosure, there is provided a method for obtaining a light intensity distribution of a backlight plate, the method being applied to a processing unit in the display control apparatus of the first aspect, the method including:
acquiring light intensity distribution information corresponding to the backlight block according to the image data corresponding to any one of the backlight blocks detected by the area array brightness detection device;
and taking the light intensity distribution information corresponding to the backlight block as the light intensity distribution information corresponding to each backlight block of the backlight plate to obtain the light intensity distribution information of the backlight plate.
According to a third part of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of any of the second parts described above.
By adopting the technical scheme, the following technical effects can be at least achieved:
the processing unit determines light intensity distribution information corresponding to a backlight plate of the display according to data detected by the area array brightness detection device, wherein the area array brightness detection device is located in front of a screen of the display, and the area array brightness detection device is used for detecting image data of the display when at least one backlight block of the backlight plate is lightened. The display main control circuit receives an image video signal, and determines the initial transmittance of the display and the initial light intensity of the backlight plate according to the image video signal. The adjusting circuit adjusts the light intensity of the backlight plate according to the light intensity distribution information and adjusts the transmittance of the display, so that the product of the adjusted light intensity of the backlight plate and the adjusted transmittance of the display is equal to the product of the initial transmittance and the initial light intensity, and the display control device controls the display to display the image video received by the main control circuit according to the adjusted light intensity of the backlight plate and the adjusted transmittance of the display. By adopting the mode of determining the light intensity distribution information of the whole backlight plate according to the image data detected by the area array brightness detection device when any backlight block is lightened, the obtained light intensity distribution information of the backlight plate can comprise the light intensity distribution of each backlight block. The method is favorable for respectively adjusting the light intensity of each backlight block of the backlight plate, and particularly, when the light intensity of each backlight block is adjusted, the gray information of an image area corresponding to the backlight block in a video image and the light diffusion influence of other backlight blocks are combined to adjust the light intensity of the backlight block, so that the transmittance of a pixel area on a display corresponding to the backlight block is adjusted according to the adjusted light intensity of each backlight block, and the problems in the related art can be solved.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic structural diagram illustrating a display control apparatus according to an exemplary embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram illustrating another display control apparatus according to an exemplary embodiment of the present disclosure.
Fig. 3A is a schematic diagram illustrating a backlight block according to an exemplary embodiment of the present disclosure.
Fig. 3B is a schematic diagram illustrating a backlight block corresponding to a pixel region on a display according to an exemplary embodiment of the present disclosure.
Fig. 4 is a light intensity distribution diagram of a backlight block according to an exemplary embodiment of the present disclosure.
Fig. 5A is a diagram illustrating a predetermined image according to an exemplary embodiment of the present disclosure.
Fig. 5B is a photographic image shown according to an exemplary embodiment of the present disclosure.
Fig. 6 is a flowchart illustrating a method of obtaining a light intensity distribution of a backlight panel according to an exemplary embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
A backlight display generally includes a backlight panel and a liquid crystal display panel. The liquid crystal display panel is composed of a color filter substrate having red, green and blue color filter patterns and a liquid crystal layer. The backlight plate is composed of light emitting diodes or fluorescent light sources. The liquid crystal display panel itself does not have a light emitting property. The liquid crystal display panel is illuminated by the backlight and selectively filters a portion of the colors, thereby displaying images of different colors.
The currently commonly used backlight plate is an edge type backlight plate or a direct type backlight plate. In the related art, the light intensity distribution information of the entire backlight panel is obtained by lighting the LED lamps on the entire backlight panel or fitting the light intensity distribution information of the entire backlight panel based on the performance parameters of each LED lamp, and the video image signal is processed based on the light intensity distribution information of the backlight panel to display the video image on the liquid crystal display panel. Because the light intensity distribution information of the backlight plate is obtained under the condition of lighting the LED lamps on the whole backlight plate, the backlight brightness of the backlight plate can not be dynamically adjusted along with the change of display contents, so that when the display contents are dark, the light intensity utilization rate of the backlight plate is not high, and energy waste is caused. In addition, the transmittance of the lcd panel cannot be adjusted to 0%, which results in poor contrast when the lcd displays video images.
In view of the above, embodiments of the present disclosure provide a display control device and a method for obtaining a light intensity distribution of a backlight plate, so as to overcome the above-mentioned problems in the related art.
The present disclosure takes the light source on the backlight plate as an LED lamp as an example to explain the above technical solution.
Fig. 1 is a schematic structural diagram illustrating a display control apparatus 100 according to an exemplary embodiment of the present disclosure, the display control apparatus 100 including one or more integrated circuits;
wherein the one or more integrated circuits comprise: a processing unit 101, configured to determine light intensity distribution information corresponding to a backlight panel of a display according to data detected by an area array brightness detection device 200 (see fig. 2), where the area array brightness detection device is located in front of a screen of the display and is configured to detect image data of the display when at least one backlight block of the backlight panel is turned on; the display main control circuit 102 is configured to receive an image video signal, and determine an initial transmittance of the display and an initial light intensity of the backlight according to the image video signal; the adjusting circuit 103 is configured to adjust the light intensity of the backlight according to the light intensity distribution information, and adjust the transmittance of the display, so that a product of the adjusted light intensity of the backlight and the adjusted transmittance of the display is equal to a product of the initial transmittance and the initial light intensity.
The area array brightness detection device 200 may be an LED light intensity distribution tester, a camera, or the like. The area array brightness detection device 200 is connected to the processing unit 101. The area array brightness detection apparatus 200 is located in front of a screen of a display, and specifically may be in front of the display or in front of a display area corresponding to any backlight block. The area array brightness detection device 200 is configured to detect image data of the display when at least one backlight block of the backlight panel is turned on, and transmit the detected data to the processing unit 101, and the processing unit 101 determines light intensity distribution information of the backlight panel of the display according to the data.
In an implementation, the backlight plate can be divided into a plurality of identical backlight blocks, for example, as shown in fig. 3A, four adjacent LED lamps on the backlight plate can be used as one backlight block, so that the array of LED lamps on the backlight plate can be equally divided into a plurality of backlight blocks. It is understood that other numbers of LED lamps adjacent to the backlight plate can be used as a backlight block. The present disclosure is not particularly limited as to how many LED lamps each backlight block has.
In one embodiment, the lighting control may be performed individually for each backlight block. It should be understood that after the backlight panel is divided into a plurality of identical backlight blocks, the light intensity distribution of each of the backlight blocks should be identical. Therefore, the processing unit 101 can determine the light intensity distribution information when the whole backlight panel is lit, based on the image data of the display when any one backlight block of the backlight panel is lit, which is detected by the area array luminance detection device 200. It should be noted that, after the lamp array of the backlight panel is partitioned, each backlight block of the backlight panel corresponds to a partial pixel region of the display, that is, each backlight block corresponds to a pixel region on the display. Illustratively, as shown in FIG. 3B, one backlight block corresponds to one pixel area on the display.
When the display main control circuit 102 receives an image video signal to be displayed, the initial transmittance of the display and the initial light intensity of the backlight plate are determined according to the image video signal. In detail, the display main control circuit 102 determines an initial transmittance corresponding to each pixel point on the display and an initial brightness of each backlight block according to the image video signal.
Further, the adjusting circuit 103 adjusts the light intensity of the backlight plate according to the light intensity distribution information of the backlight plate. In an implementation manner, since each pixel region on the display correspondingly displays one image region in each frame of image when each frame of image of the video image is displayed on the display, the light intensity of each backlight block can be independently adjusted according to the light intensity distribution information of each backlight block in the light intensity distribution information of the backlight plate and the target gray scale value of each image region in the video image respectively corresponding to each backlight block. The target gray value is determined according to the gray value of each pixel point in the image region, and specifically may be the maximum gray value among the gray values of all the pixel points in the image region, or may be an average value or other statistical values of the gray values of each pixel point in the image region.
Furthermore, the transmittance of the pixel region on the display corresponding to each backlight block can be adjusted according to the adjusted light intensity of the backlight block, so that the product of the adjusted light intensity of any backlight block of the backlight plate and the adjusted transmittance of the corresponding pixel region on the display is equal to the product of the initial transmittance of the pixel region and the initial light intensity of the backlight plate.
With this display control apparatus 100, the processing unit 101 determines the light intensity distribution information corresponding to the backlight panel of the display according to the data detected from the area array brightness detection apparatus 200, wherein the area array brightness detection apparatus 200 is located in front of the screen of the display and is used for detecting the image data of the display when at least one backlight block of the backlight panel is lit. The display main control circuit 102 receives an image video signal, and determines an initial transmittance of the display and an initial light intensity of the backlight according to the image video signal. The adjusting circuit 103 can adjust the light intensity of the backlight plate according to the light intensity distribution information, and adjust the transmittance of the display, so that the product of the adjusted light intensity of the backlight plate and the adjusted transmittance of the display is equal to the product of the initial transmittance and the initial light intensity, and the display control device controls the display to display the image video received by the main control circuit according to the adjusted light intensity of the backlight plate and the adjusted transmittance of the display. By adopting the manner of determining the light intensity distribution information of the whole backlight plate according to the image data detected by the area array brightness detection device 200 when any backlight block is lighted, the obtained light intensity distribution information of the backlight plate can comprise the independent light intensity distribution of each backlight block. The method is favorable for respectively adjusting the light intensity of each backlight block of the backlight plate, and particularly, when the light intensity of each backlight block is adjusted, the gray information of an image area corresponding to the backlight block in a video image and the light diffusion influence of other backlight blocks are combined to adjust the light intensity of the backlight block, so that the transmittance of a pixel area on a display corresponding to the backlight block is adjusted according to the adjusted light intensity of each backlight block, and the problems in the related art can be solved.
It should be noted that the light intensity of each backlight block can be determined and adjusted according to the video image information to be displayed in the pixel region of the display corresponding to the backlight block. Therefore, the purpose of respectively adjusting the light intensity of each backlight block on the backlight plate corresponding to each image area according to the content of different image areas in the same frame of video image can be realized. Similarly, the light intensity of the whole backlight plate can be determined and adjusted according to each frame of image of the video image to be displayed on the display, so that the aim of dynamically adjusting the light intensity of the backlight plate corresponding to each frame of image according to different frames of images can be fulfilled. The mode improves the light intensity utilization rate of the backlight plate and reduces energy waste.
It should be noted that the above-mentioned manner of determining the light intensity distribution information of the whole backlight plate according to the image data of any backlight block detected by the area array brightness detection apparatus 200 when being independently turned on is beneficial to performing dynamic partitioning on the backlight plate by taking the backlight block as a unit, for example, one or more adjacent backlight blocks can be used as a backlight area according to requirements. Therefore, the LED lamp array of the backlight plate can be conveniently divided into different backlight areas according to different requirements.
Optionally, the backlight plate is obtained by performing brightness uniformity correction on each backlight block by using a lamp bead, and the processing unit 101 is specifically configured to: acquiring light intensity distribution information corresponding to any backlight block according to the image data corresponding to the backlight block; using the light intensity distribution information corresponding to the backlight block as the light intensity distribution information corresponding to each backlight block of the backlight plate to obtain the light intensity distribution information of the backlight plate; when each backlight block of the backlight plate is lightened aiming at the same gray level, if a target pixel point with inconsistent light intensity with that of other pixel points exists, weight distribution is carried out aiming at the backlight block corresponding to the target pixel point and the light intensity distribution information corresponding to the other backlight blocks around the backlight block, so that the light intensity of the target pixel point is consistent with that of the other pixel points, and new light intensity distribution information of the backlight plate is obtained.
The backlight plate comprises a plurality of backlight blocks, and after the backlight blocks on the backlight plate are corrected through the brightness consistency of the lamp beads, each lamp bead has the same light intensity/brightness under the same gray scale, and each backlight block is required to have the same light intensity distribution.
Specifically, the processing unit 101 determines the light intensity distribution information of the backlight panel by performing the following steps:
first, according to the image data corresponding to any one of the backlight blocks detected by the area array brightness detection apparatus 200, the light intensity distribution information corresponding to the backlight block is obtained. Taking the backlight block shown in fig. 3A as an example, the light intensity distribution corresponding to the backlight block is obtained as shown in fig. 4.
Then, the light intensity distribution information corresponding to the backlight block is used as the light intensity distribution information corresponding to each backlight block of the backlight plate, so that the light intensity distribution information of the backlight plate can be obtained through calculation.
In a possible case, when the light intensity distribution information corresponding to any backlight block is used as the light intensity distribution information corresponding to each backlight block of the backlight plate, the obtained light intensity distribution of the backlight plate may be different from the actual light intensity distribution of the backlight plate. Therefore, in order to solve the difference problem, after the light intensity distribution information corresponding to any backlight block is used as the light intensity distribution information corresponding to each backlight block of the backlight panel, the processing unit 101 may further perform the following steps: when each backlight block on the backlight plate is controlled to be lightened aiming at the same gray level, whether a target pixel point with inconsistent light intensity with that of other pixel points exists on the display or not is judged, if yes, weight distribution is carried out aiming at the backlight block corresponding to the target pixel point and light intensity distribution information corresponding to other backlight blocks around the backlight block, so that the light intensity of the target pixel point is consistent with that of other pixel points, and the light intensity distribution information of the backlight plate after weight distribution processing is obtained.
The specific implementation of the weight assignment is similar to the weight assignment strategy in the related art, and is not described in detail here.
In this way, the light intensity distribution information of the whole backlight plate is calculated and obtained under the condition of considering the light diffusion according to the light intensity distribution information of any one backlight block. And according to the actual light intensity data when each backlight block on the backlight plate is lightened aiming at the same gray level, carrying out weight distribution on the light intensity distribution of the backlight plate obtained by calculation to obtain the light intensity distribution information of the backlight plate after the weight distribution processing. According to the light intensity distribution information of the backlight plate after the weight distribution processing, the light intensity of each pixel point on the display can be ensured to be consistent under the same gray level, and therefore the uniformity and the precision of the video image on the display can be improved.
Optionally, the acquiring, by the processing unit 101, light intensity distribution information corresponding to any one of the backlight blocks according to the image data corresponding to the backlight block may specifically include the following steps:
and according to the image data corresponding to any backlight block, acquiring sub-light intensity distribution information in any quadrant of four quadrants of a two-dimensional coordinate axis with the center of the backlight block as an origin, and sequentially carrying out X-axis symmetric copying and Y-axis symmetric copying on the sub-light intensity distribution information to obtain light intensity distribution information corresponding to the backlight block.
It will be understood that when the array of LED lamps included in the backlight block is a symmetric array, such as the backlight block shown in fig. 3A, the light intensity distribution of the backlight block exhibits a symmetric distribution as shown in fig. 4. Therefore, in an implementation manner, according to image data corresponding to any backlight block, sub-light intensity distribution information in any quadrant of four quadrants of a coordinate axis with the center of the backlight block as an origin is obtained, and the sub-light intensity distribution information is sequentially subjected to X-axis symmetric copying and Y-axis symmetric copying operations, so that complete light intensity distribution information corresponding to the backlight block is obtained. Or, in another implementation, according to image data corresponding to any backlight block, obtaining sub-light intensity distribution information in any quadrant of four quadrants of a coordinate axis with the center of the backlight block as an origin, and sequentially performing Y-axis symmetric copy and X-axis symmetric copy operations on the sub-light intensity distribution information to obtain complete light intensity distribution information corresponding to the backlight block. In this way, the acquired light intensity distribution of the backlight block can be more symmetrical and uniform.
Optionally, the display main control circuit 102 is further configured to control the display to display a predetermined image; the processing unit 101 is further configured to: acquiring a shot image obtained by shooting the predetermined image by the area array brightness detection device 200; determining a conversion parameter for converting the photographed image to the predetermined image by an image conversion algorithm; the processing unit 101 is further configured to, after obtaining light intensity distribution information corresponding to any one of the backlight blocks according to the image data corresponding to the backlight block, convert the light intensity distribution information according to the conversion parameter, and obtain modified light intensity distribution information of the backlight block.
The image change algorithm may be a distortion correction algorithm or an image scaling algorithm. The present disclosure is not particularly limited thereto.
In a possible case, since there is an error in the placement position between the area array luminance detecting apparatus 200 and the display, there may be shape distortion in the image data captured by the area array luminance detecting apparatus 200 for the display. In order to avoid the error of the calculated light intensity distribution information of the backlight plate caused by this situation, the image data detected by the array luminance detecting device 200 may be corrected.
Specifically, the display is controlled by the display master circuit 102 to display a predetermined image, illustratively, as shown in fig. 5A. Next, the processing unit 101 acquires a captured image obtained by the area array luminance detecting apparatus 200 capturing the predetermined image, illustratively, a captured image shown in fig. 5B; conversion parameters capable of converting the photographed image into the predetermined image are determined by a distortion correction algorithm and/or a scaling algorithm. By way of example, the conversion parameter may be expressed as:
then, after acquiring the light intensity distribution information corresponding to any backlight block according to the image data corresponding to the backlight block, the processing unit 101 converts the light intensity distribution information according to the conversion parameter to obtain the corrected light intensity distribution information of the backlight block. Specifically, the calculation process of converting the light intensity distribution information according to the conversion parameter to obtain the corrected light intensity distribution information of the backlight block may be characterized as follows:
In this way, the light intensity distribution information acquired by the area array brightness detection device 200 can be converted according to the conversion parameters to obtain the corrected light intensity distribution information of the backlight block, so that the light intensity distribution information of the backlight plate determined according to the corrected light intensity distribution information of the backlight block is more accurate.
Optionally, the light intensity distribution information is two-dimensional array data, and each element in the two-dimensional array data represents the light intensity of each pixel point in a pixel region corresponding to the backlight block on the display; the processing unit 101 is further configured to:
and after light intensity distribution information corresponding to any backlight block is acquired, quantizing the light intensity distribution information, wherein the quantizing comprises floating point fixed-point processing, and the processing unit disperses an error caused by the quantizing process to any pixel point to the light intensity of an adjacent pixel point of the pixel point in the process of quantizing the light intensity distribution information.
It should be understood by those skilled in the art that the light intensity distribution information (the unit of the light intensity value is candela, and english is candela, cd for short) acquired by the area array luminance detecting apparatus 200 is data of floating point type. Therefore, for the convenience of calculation, floating point fixed point processing is performed on the light intensity distribution information of the backlight block. It is understood that a conversion error may be caused during the floating-point fixed-point processing of the light intensity distribution information of the backlight block. Therefore, in order to avoid the calculation error in the quantization process, the error caused by any pixel point in the quantization process can be dispersed to the light intensity of the adjacent pixel point of the pixel point.
By adopting the method, the error brought in the quantization process is dispersed to the adjacent pixel position by the error diffusion method, and the error between the calculated light field distribution information and the actual light field distribution information can be reduced.
Optionally, the display main control circuit 102 is further configured to configure the red, green, and blue transmittances of all the pixels on the display to be preset transmittances before the area array brightness detection apparatus 200 starts to detect.
In one embodiment, the predetermined transmittance is 100% transmittance.
Based on the same inventive concept, the disclosed embodiments further provide a method for obtaining a light intensity distribution of a backlight plate, where the method is applied to a processing unit in the display control device according to the first aspect, as shown in fig. 6, and the method includes the following steps:
s61, acquiring light intensity distribution information corresponding to the backlight block according to the image data corresponding to any backlight block detected by the area array brightness detection device;
s62, taking the light intensity distribution information corresponding to the backlight block as the light intensity distribution information corresponding to each backlight block of the backlight plate to obtain the light intensity distribution information of the backlight plate;
optionally, the method further comprises the steps of: when each backlight block of the backlight plate is lightened aiming at the same gray level, if a target pixel point with inconsistent light intensity with that of other pixel points exists, weight distribution is carried out aiming at the backlight block corresponding to the target pixel point and the light intensity distribution information corresponding to the other backlight blocks around the backlight block, so that the light intensity of the target pixel point is consistent with that of the other pixel points, and new light intensity distribution information of the backlight plate is obtained.
By adopting the method, the light intensity distribution information corresponding to the backlight block is obtained according to the image data corresponding to any backlight block detected by the area array brightness detection device, and the light intensity distribution information corresponding to the backlight block is used as the light intensity distribution information corresponding to each backlight block of the backlight plate, so that the light intensity distribution information of the whole backlight plate is obtained. And calculating the light intensity sum of the pixel point under the light intensity radiation of each backlight block aiming at each pixel point of the display, and if a target pixel point with the light intensity sum inconsistent with the light intensity sum of other pixel points exists, performing weight distribution aiming at the backlight block corresponding to the target pixel point and the light intensity distribution information corresponding to other backlight blocks around the backlight plate so as to ensure that the light intensity sum of the target pixel point is consistent with the light intensity sum of other pixel points. Thus, the light intensity distribution information of each backlight block on the backlight plate under the corresponding weight is obtained. The light intensity distribution information of the backlight plate determined in the mode is beneficial to dynamically adjusting the light intensity of each backlight block in a partitioning manner. Specifically, when the light intensity of each backlight block is adjusted according to the light intensity distribution information of the backlight block, the light intensity distribution information of the backlight block is adjusted according to the content of the corresponding image area in the video image and the light diffusion influence of other backlight blocks, and then the transmittance of the pixel area on the display corresponding to the backlight block is adjusted according to the adjusted light intensity distribution information of each backlight block, so that the problems in the related art can be solved.
Optionally, the obtaining, according to the image data corresponding to any one of the backlight blocks, light intensity distribution information corresponding to the backlight block includes:
and according to the image data corresponding to any backlight block, acquiring sub-light intensity distribution information in any quadrant of four quadrants of a two-dimensional coordinate axis with the center of the backlight block as an origin, and sequentially carrying out X-axis symmetric copying and Y-axis symmetric copying on the sub-light intensity distribution information to obtain light intensity distribution information corresponding to the backlight block.
Optionally, the method further comprises:
acquiring a shot image obtained by shooting a preset image displayed by the display by the area array brightness detection device;
determining a conversion parameter for converting the photographed image to the predetermined image by an image conversion algorithm;
and after acquiring the light intensity distribution information corresponding to any backlight block according to the image data corresponding to the backlight block, converting the light intensity distribution information according to the conversion parameter to obtain the corrected light intensity distribution information of the backlight block.
Optionally, the light intensity distribution information is two-dimensional array data, and each element in the two-dimensional array data represents the light intensity of each pixel point in a pixel region corresponding to the backlight block on the display;
the method further comprises the following steps:
and after light intensity distribution information corresponding to any backlight block is acquired, quantizing the light intensity distribution information, wherein the quantizing comprises floating point fixed-point processing, and the processing unit disperses an error caused by the quantizing process to any pixel point to the light intensity of an adjacent pixel point of the pixel point in the process of quantizing the light intensity distribution information.
With regard to the method in the above-described embodiment, the detailed implementation of each step has been described in detail in the embodiment of the display control apparatus related to the method, and will not be elaborated here.
Embodiments of the present disclosure also provide a computer readable storage medium including program instructions, which when executed by a processor, implement the above-mentioned step of obtaining the light intensity distribution of the backlight panel.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A display control apparatus comprising one or more integrated circuits;
wherein the one or more integrated circuits comprise:
the backlight module comprises a processing unit, a backlight module and an area array brightness detection device, wherein the processing unit is used for determining light intensity distribution information corresponding to a backlight plate of a display according to data detected by the area array brightness detection device, and the area array brightness detection device is positioned in front of a screen of the display and is used for detecting image data of the display when at least one backlight block of the backlight plate is lightened;
the display main control circuit is used for receiving an image video signal and determining the initial transmittance of the display and the initial light intensity of the backlight plate according to the image video signal;
the adjusting circuit is used for adjusting the initial light intensity of the backlight plate according to the light intensity distribution information and adjusting the initial transmittance of the display, so that the product of the adjusted light intensity of the backlight plate and the adjusted transmittance of the display is equal to the product of the initial transmittance of the display and the initial light intensity of the backlight plate;
wherein, the board is the board that is shaded from the sun after each is shaded the piece and is corrected through lamp pearl luminance uniformity, processing unit specifically still is used for: acquiring light intensity distribution information corresponding to any backlight block according to the image data corresponding to the backlight block; using the light intensity distribution information corresponding to the backlight block as the light intensity distribution information corresponding to each backlight block of the backlight plate to obtain the light intensity distribution information of the backlight plate;
the processing unit is further to: when each backlight block of the backlight plate is lightened aiming at the same gray level, if a target pixel point with inconsistent light intensity with that of other pixel points exists, weight distribution is carried out aiming at the backlight block corresponding to the target pixel point and the light intensity distribution information corresponding to the other backlight blocks around the backlight block, so that the light intensity of the target pixel point is consistent with that of the other pixel points, and new light intensity distribution information of the backlight plate is obtained.
2. The apparatus according to claim 1, wherein the processing unit obtains light intensity distribution information corresponding to any backlight block according to the image data corresponding to the backlight block, and comprises:
and according to the image data corresponding to any backlight block, acquiring sub-light intensity distribution information in any quadrant of four quadrants of a two-dimensional coordinate axis with the center of the backlight block as an origin, and sequentially carrying out X-axis symmetric copying and Y-axis symmetric copying on the sub-light intensity distribution information to obtain light intensity distribution information corresponding to the backlight block.
3. The display control device according to claim 1 or 2, wherein the display main control circuit is further configured to control the display to display a predetermined image;
the processing unit is further to: acquiring a shot image obtained by shooting the preset image by the area array brightness detection device;
determining a conversion parameter for converting the photographed image to the predetermined image by an image conversion algorithm;
the processing unit is further configured to, after obtaining light intensity distribution information corresponding to any one of the backlight blocks according to the image data corresponding to the backlight block, convert the light intensity distribution information according to the conversion parameter, and obtain the corrected light intensity distribution information of the backlight block.
4. The display control apparatus according to claim 1 or 2, wherein the light intensity distribution information is two-dimensional array data, each element in the two-dimensional array data representing the light intensity of each pixel point in a pixel region corresponding to the backlight block on the display;
the processing unit is further to:
and after light intensity distribution information corresponding to any backlight block is acquired, quantizing the light intensity distribution information, wherein the quantizing comprises floating point fixed-point processing, and the processing unit disperses an error caused by the quantizing process to any pixel point to the light intensity of an adjacent pixel point of the pixel point in the process of quantizing the light intensity distribution information.
5. The display control device according to claim 1 or 2, wherein the display main control circuit is further configured to configure the red, green and blue transmittances of all the pixels on the display to be preset transmittances before the area array brightness detection device starts detecting.
6. A method for obtaining a light intensity distribution of a backlight panel, the method being applied to a processing unit in the display control device according to claim 1, the method comprising:
acquiring light intensity distribution information corresponding to the backlight block according to the image data corresponding to any one of the backlight blocks detected by the area array brightness detection device;
using the light intensity distribution information corresponding to the backlight block as the light intensity distribution information corresponding to each backlight block of the backlight plate to obtain the light intensity distribution information of the backlight plate;
when each backlight block of the backlight plate is lightened aiming at the same gray level, if a target pixel point with inconsistent light intensity with that of other pixel points exists, weight distribution is carried out aiming at the backlight block corresponding to the target pixel point and the light intensity distribution information corresponding to the other backlight blocks around the backlight block, so that the light intensity of the target pixel point is consistent with that of the other pixel points, and new light intensity distribution information of the backlight plate is obtained.
7. The method according to claim 6, wherein the obtaining the light intensity distribution information corresponding to any backlight block according to the image data corresponding to the backlight block comprises:
and according to the image data corresponding to any backlight block, acquiring sub-light intensity distribution information in any quadrant of four quadrants of a two-dimensional coordinate axis with the center of the backlight block as an origin, and sequentially carrying out X-axis symmetric copying and Y-axis symmetric copying on the sub-light intensity distribution information to obtain light intensity distribution information corresponding to the backlight block.
8. The method of claim 6 or 7, further comprising:
acquiring a shot image obtained by shooting a preset image displayed by the display by the area array brightness detection device;
determining a conversion parameter for converting the photographed image to the predetermined image by an image conversion algorithm;
and after acquiring the light intensity distribution information corresponding to any backlight block according to the image data corresponding to the backlight block, converting the light intensity distribution information according to the conversion parameter to obtain the corrected light intensity distribution information of the backlight block.
9. The method according to claim 6 or 7, wherein the light intensity distribution information is two-dimensional array data, each element in the two-dimensional array data represents the light intensity of each pixel point in the pixel region corresponding to the backlight block on the display;
the method further comprises the following steps:
and after light intensity distribution information corresponding to any backlight block is acquired, quantizing the light intensity distribution information, wherein the quantizing comprises floating point fixed-point processing, and the processing unit disperses an error caused by the quantizing process to any pixel point to the light intensity of an adjacent pixel point of the pixel point in the process of quantizing the light intensity distribution information.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 6 to 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/100709 WO2022006755A1 (en) | 2020-07-07 | 2020-07-07 | Display control device and method for obtaining light intensity distribution of backlight panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112543967A CN112543967A (en) | 2021-03-23 |
| CN112543967B true CN112543967B (en) | 2021-07-30 |
Family
ID=75017216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080003281.XA Active CN112543967B (en) | 2020-07-07 | 2020-07-07 | Display control device and method for acquiring light intensity distribution of backlight plate |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112543967B (en) |
| WO (1) | WO2022006755A1 (en) |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI466093B (en) * | 2007-06-26 | 2014-12-21 | Apple Inc | Management techniques for video playback |
| CN201340719Y (en) * | 2008-12-22 | 2009-11-04 | 北京巨数数字技术开发有限公司 | Liquid crystal display adjusting device and liquid crystal display device |
| KR101351414B1 (en) * | 2009-12-14 | 2014-01-23 | 엘지디스플레이 주식회사 | Method for driving local dimming of liquid crystal display device using the same and apparatus thereof |
| CN102129839A (en) * | 2010-01-15 | 2011-07-20 | 光远科技股份有限公司 | Display with edge-lit light guide combined backlight board and homogenization method thereof |
| CN101777311B (en) * | 2010-03-05 | 2013-05-01 | 青岛海信电器股份有限公司 | Dynamic backlight brightness control method |
| CN101826282B (en) * | 2010-04-16 | 2014-12-03 | 深圳市中庆微科技开发有限公司 | Liquid crystal display device and processing method of digital image signal |
| CN102243852B (en) * | 2011-07-04 | 2014-02-26 | 深圳市华星光电技术有限公司 | Liquid crystal display, and method and device for driving liquid crystal display |
| CN104106109B (en) * | 2012-02-03 | 2017-06-06 | 松下知识产权经营株式会社 | Video display control apparatus |
| JP2014021451A (en) * | 2012-07-23 | 2014-02-03 | Sharp Corp | Luminance control method for liquid crystal display device |
| CN103796380B (en) * | 2013-12-25 | 2016-08-17 | 深圳市华星光电技术有限公司 | Liquid crystal indicator and backlight thereof and light-dimming method |
| CN103810980B (en) * | 2014-01-23 | 2016-01-06 | 华南理工大学 | A kind of liquid crystal display method of reducing power consumption based on the image frequency of occurrences |
| US10013952B2 (en) * | 2014-04-25 | 2018-07-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Adjusting brightness of a display based on an intensity of light reflected by a user's eye |
| CN105158917B (en) * | 2015-10-27 | 2018-03-13 | 北京国承万通信息科技有限公司 | Display and its transmittance/reflectance determine method and apparatus |
| US20180211607A1 (en) * | 2017-01-24 | 2018-07-26 | Séura, Inc. | System for automatically adjusting picture settings of an outdoor television in response to changes in ambient conditions |
| CN108877701B (en) * | 2017-05-08 | 2020-02-07 | 北京小米移动软件有限公司 | Method and device for displaying image |
| CN207966469U (en) * | 2018-01-17 | 2018-10-12 | 上海坦继显示技术有限公司 | A kind of low-light-level display device |
| CN108445578A (en) * | 2018-04-02 | 2018-08-24 | 京东方科技集团股份有限公司 | A kind of side entrance back module, display module and backlight adjusting method |
| KR102649063B1 (en) * | 2018-10-24 | 2024-03-20 | 삼성전자주식회사 | Display apparatus and driving method thereof |
| CN109960082B (en) * | 2019-05-05 | 2022-06-07 | 京东方科技集团股份有限公司 | Field sequence display module, display device and field sequence display control method |
-
2020
- 2020-07-07 CN CN202080003281.XA patent/CN112543967B/en active Active
- 2020-07-07 WO PCT/CN2020/100709 patent/WO2022006755A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN112543967A (en) | 2021-03-23 |
| WO2022006755A1 (en) | 2022-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9324278B2 (en) | Ambient black level | |
| CN109891484A (en) | Display device and display methods | |
| JP5843662B2 (en) | Display device and television receiver | |
| CN101399023B (en) | Method of controlling backlight module, backlight controller and display device using the same | |
| CN101282416B (en) | Method for displaying projection | |
| JP2009053687A (en) | Back light unit and its usage | |
| JP2006121713A (en) | Enhancing contrast | |
| JP2012518206A (en) | System and method for display backlight compensation | |
| CN113223466B (en) | Display screen brightness correction method and device and electronic equipment | |
| US11102460B2 (en) | Image processing apparatus, display apparatus, and image processing and display apparatus and method | |
| CN113393803A (en) | Picture generation method and device in correction process | |
| CN112543967B (en) | Display control device and method for acquiring light intensity distribution of backlight plate | |
| CN112543969B (en) | Brightness and chrominance correction method, device and system, storage medium and display | |
| CN101187756B (en) | Display, display circuit and processing method for obtaining high dynamic range image | |
| CN110534063B (en) | Backlight source adjusting method for regional dimming and display device | |
| CN112543968B (en) | Display control device and method for determining light intensity of backlight area | |
| CN108550341B (en) | Display device and display method | |
| CN106471565A (en) | Image display device and for method to dimming light source | |
| CN111372020B (en) | Image display method, terminal and storage medium for enhancing contrast | |
| CN114927086A (en) | Gamma debugging method, device, equipment and storage medium for display panel | |
| CN110286491B (en) | Display device for enhancing X-ray film projection image | |
| CN112513967B (en) | Display control device and method for determining pixel brightness | |
| CN115609915A (en) | Light intensity adjusting method and device of 3D printer | |
| TWI672978B (en) | Back light adjusting method and display device for local dimming | |
| WO2024024011A1 (en) | Image display control device, image display system, and image display control method |
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 |