CN110599950A - Display device and luminance adjusting method thereof - Google Patents
Display device and luminance adjusting method thereof Download PDFInfo
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- CN110599950A CN110599950A CN201910946854.1A CN201910946854A CN110599950A CN 110599950 A CN110599950 A CN 110599950A CN 201910946854 A CN201910946854 A CN 201910946854A CN 110599950 A CN110599950 A CN 110599950A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The invention belongs to the technical field of displays, and particularly relates to a display device which comprises a display part, a control part and a compensation part, wherein the control part and the compensation part are electrically connected with the display part, the control part is used for inputting first input image data to the display part, the display part is used for detecting the first input image data and forming detected luminance according to the first input image data, and the compensation part is used for generating compensation pixels according to the luminance difference value when the luminance difference value of the detected luminance and standard luminance exceeds a standard value. The invention improves the quality of the display device by compensating the pixels and can control the production cost. In addition, the invention also discloses a brightness adjusting method of the display device.
Description
Technical Field
The invention belongs to the technical field of displays, and particularly relates to a display device and a luminance adjusting method thereof.
Background
In the display device, pixels have specific variations due to foreign substances generated in the manufacturing process and manufacturing process variations, and further, luminance variations occur, and/or variations in threshold voltages and degrees of channel movement of transistors located in the pixels due to driving and/or luminance variations occur due to thermal conduction of light emitting elements, and finally, image quality distortion including speckle occurs in a picture.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the display device is provided, the quality of the display device is improved in a pixel compensation mode, and the production cost can be controlled.
In order to achieve the purpose, the invention adopts the following technical scheme:
a display device comprises a display part, a control part and a compensation part, wherein the control part and the compensation part are electrically connected with the display part, the control part is used for inputting first input image data to the display part, the display part is used for detecting the first input image data and forming detected luminance according to the first input image data, and when the luminance difference value of the detected luminance and standard luminance exceeds a standard value, the compensation part is used for generating compensation pixels according to the luminance difference value.
As an improvement of the display device of the present invention, the number of the display portions is plural, and the plural display portions are connected to each other.
As an improvement of the display device according to the present invention, the control section includes a data correction section for transmitting luminance correction data to the display section.
As an improvement of a display device according to the present invention, the compensation section includes an encoder, a memory, and a decoder, the encoder includes a compensation data generation section and a compression section, and the decoder, the compensation data generation section, and the compression section are connected to the memory.
As an improvement of the display device of the present invention, the display device further includes a driver including a scan driver and a source driver, both of which are connected to the display portion.
The second purpose of the invention is: a method for adjusting the brightness of a display device comprises
A first image display stage, outputting first input image data to a display part with a preset number of pixels;
and a compensation pixel output stage, which is used for forming the detected brightness according to the first input image data, and generating compensation data corresponding to the compensation pixel according to the brightness difference value when the brightness difference value between the detected brightness and the standard brightness exceeds the standard value.
As an improvement of the luminance adjusting method of a display device according to the present invention, the compensation pixel output stage further includes:
generating a luminance plane mapped to pixel positions of the detected luminance;
and setting at least one neighboring pixel neighboring the pixel corresponding to the detected luminance, and setting the luminance corresponding to the neighboring pixel as the standard luminance.
As an improvement of the luminance adjusting method of a display device according to the present invention, the compensation pixel output stage further includes:
generating a luminance distribution map of the first input image data;
setting the center luminance of the luminance profile as the standard luminance.
As an improvement of the luminance adjusting method of the display device according to the present invention, the first image displaying stage further includes:
receiving the global brightness of the first input image data;
transmitting luminance correction data for correcting a global luminance difference in the display section to the display section.
As an improvement of the luminance adjusting method of the display device according to the present invention, the global luminance is an average luminance or a center luminance of the first input image data.
The invention has the beneficial effects that the invention comprises a display part, a control part and a compensation part, wherein the control part and the compensation part are electrically connected with the display part, the control part is used for inputting first input image data to the display part, the display part is used for detecting the first input image data and forming detected luminance according to the first input image data, and the compensation part is used for generating compensation pixels according to the luminance difference value when the luminance difference value of the detected luminance and standard luminance exceeds a standard value. The invention improves the quality of the display device by compensating the pixels and can control the production cost.
Drawings
FIG. 1 is a schematic structural diagram of a display device according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a compensation portion according to the present invention;
FIG. 3 is a schematic structural diagram of a display device according to embodiment 2 of the present invention;
FIG. 4 is a flowchart illustrating luminance adjustment of a display device according to the present invention;
FIG. 5 is a flow chart of compensated pixel output according to the present invention;
FIG. 6 is a diagram illustrating a compensated pixel output method of FIG. 5;
FIG. 7 is a flow chart of compensated pixel output according to the present invention;
FIG. 8 is a luminance distribution diagram of a test image;
wherein: 110-a display section; 128-a control section; 126-a compensation section; 1261-an encoder; 1267-memory; 1269-decoder; 1263-a compensation data generating part; 1265-a compression section; 120A-a driver; 122-a scan driver; 124-source driver.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.
Example 1
As shown in fig. 1 ~ 2, a display device includes a display unit 110, a control unit 128, and a compensation unit 126, wherein the control unit 128 and the compensation unit 126 are electrically connected to the display unit 110, the control unit 128 is configured to input first input image data to the display unit 110, the display unit 110 is configured to detect the first input image data and form a detected luminance from the first input image data, and the compensation unit 126 is configured to generate a compensation pixel from a luminance difference value when the luminance difference value between the detected luminance and a standard luminance exceeds the standard value.
Preferably, the number of the display parts 110 is plural, and the plurality of display parts 110 are connected to each other; the compensation unit 126 includes an encoder 1261, a memory 1267, and a decoder 1269, the encoder 1261 includes a compensation data generation unit 1263 and a compression unit 1265, and the decoder 1269, the compensation data generation unit 1263, and the compression unit 1265 are connected to the memory 1267; the display device further includes a driver 120A including source drivers 124, and the source drivers 124 are each connected to the display portion 110.
The display device includes a display unit 110 and a driving unit 120A; the display portion 110 is formed in a predetermined shape such as a matrix shape or a zigzag shape, and includes a certain number of pixels PX arranged therein; the pixel may display a single color of red, blue, green, or white; while the pixel may display a single color other than red, blue, green or white.
The pixel PX is composed of a light emitting element, and the light emitting element may use a self-light emitting element. For example, the light emitting element may be a light emitting diode LED, or a light emitting diode LED using a size unit of micrometer and nanometer scale; the light emitting elements may be in the form of a single peak wavelength or an even number of peak wavelengths. The light emitting diode can be formed by LED chips, the LED chips are provided with phosphor coatings, and meanwhile, light emitting diode components packaged by the LED chips can also be selectively used. The phosphor coating should be able to display no less than one peak wavelength emitted from the LED chip.
The pixel PX further includes a pixel circuit connected to the light emitting element; the pixel circuit comprises at least one thin film transistor and at least one capacitor. The pixel circuit employs a semiconductor stacked structure on an LED chip.
The driving section 120A includes a scan driver, a source driver 124, and a compensation section 126. The driving part 120A adopts a system chip; the SOC processor is electrically connected to the display unit 110. A system chip; the SOC processor is specifically an IC in a chip including a microprocessor, an internal memory 1267, a predetermined number of peripheral devices, an external bus interface unit, and the like.
The scan driver is connected to a certain number of scan lines connected to the pixels PX of the display part 110, and scan signals are transmitted to the scan lines.
The source driver 124 and a certain number of DATA lines connected to the pixels PX of the display unit 110 are connected to each other, and convert the luminance correction image DATA' transmitted from the control unit 128 into a signal in the form of a voltage or a current and transmit the signal to the DATA lines.
The compensator 126 transmits DATA necessary for luminance correction of the input video DATA raw DATA, hereinafter referred to as compensation DATA, to the controller 128. The compensation unit 126 may generate and store compensation data in advance; the compensation section 126 transmits pixels necessary for luminance correction, hereinafter referred to as compensation pixels, by test image luminance analysis, and then generates compensation data of the compensation pixels on the basis of the test image luminance. The compensation data is a difference between the luminance of the compensation pixel and the standard luminance or luminance correction data generated based on the luminance difference. The compensation unit 126 stores only compensation data of compensation pixels, instead of compensation data of all pixels, and thus the memory 1267 in the driving unit 120A can be reduced in capacity.
The control section 128 transmits the generated scan control signal and data control signal to the respective scan driver and source driver; the control section 128 receives input image DATA inputted from an external exemplified image controller, and then transmits luminance correction image DATA' for correcting the input image DATA to the source driver using the compensation DATA. The control unit 128 converts the input video DATA into the corrected video DATA' using the compensation DATA.
Although not shown, the driving part 120A is connected to an external power source and/or an internal power source, converts the voltages into various levels of voltages required for the operation of the respective parts, and includes a power supply part for transmitting the corresponding voltages to the display part 110 by the control of the control part 128.
The compensation unit 126 includes an encoder 1261, a memory 1267, and a decoder 1269.
The encoder 1261 includes a compensation data generation unit 1263 and a compression unit 1265.
The compensation DATA generating unit 1263 outputs the compensation pixels and generates compensation DATA of the compensation pixels, and the compensation DATA generating unit 1263 outputs the compensation pixels and generates the compensation DATA of the compensation pixels TO the display unit 110 based on the output test DATA-TO luminance of the test image.
The test image receives input test DATA-T inputted from the outside by the control part 128 and is transmitted to the source driver 124, and the source driver 124 converts the input test DATA-T into a signal in the form of voltage or current and inputs the signal to the display part 110 through the DATA line to be converted into an image. In the test image, a speckle phenomenon may occur due to data remaining in the display portion 110, variations in threshold voltage of transistors in each pixel, variations in degree of channel shift, and luminance variations caused by heating of the light emitting element.
In this embodiment, the output test DATA-TO of the test image may be image DATA obtained by photographing the test image by the photographing device, and the photographing device may be a camera. The camera transmits the output test DATA-TO, which is the test image-related image DATA transmitted TO the display unit 110, TO the compensation DATA generation unit 1263.
As in the present embodiment, the compensation data generation unit 1263 may store the compensation data of each compensation pixel in the memory 1267. In the embodiment of the present invention, the compensation data of all the pixels is not generated and stored in the memory 1267, and therefore, the capacity of the memory 1267 can be effectively reduced.
In another embodiment, the compensation data generation unit 1263 compresses the compensation data of each compensation pixel from the compression unit 1265 and stores the compressed compensation data in the memory 1267. In this embodiment, the capacity of the memory 1267 can be further reduced by data compression, and the compression method is not particularly limited.
The memory 1267 may store compensation data of each compensation pixel and compensation data of each compensation pixel subjected to compression processing; the memory 1267 is a non-volatile memory 1267, and may be, for example, a ROM or an EEPROM having a data update and delete function.
The decoder 1269 decodes the compensation data of the compensation pixels stored in the compressed memory 1267 and inputs the decoded data to the controller 128.
According to the embodiment of the invention, the compensation data is generated and stored in the detection stage before the display device leaves the factory, or the display device is used according to the designated operation cycle after leaving the factory.
Example 2
As shown in fig. 3, unlike embodiment 1: the driver of the present embodiment includes a scan driver 122; the control unit 128 includes a data correction unit for transmitting the luminance correction data to the display unit 110.
As shown in the figure, the output test DATA-TO of the test image is obtained by deriving the output test DATA of the test image on the display unit 110 by the sensing unit in the driving unit 120A. In this case, a certain number of sensing lines connected to the pixels PX are provided in the display part 110.
The compensation DATA generation section 1263 detects the luminance of the pixel from the output test DATA-TO and calculates the difference between the detected luminance and the standard luminance for each pixel.
The compensation data generation unit 1263 generates a pixel having a luminance difference value exceeding a standard value, which is used as a compensation pixel; the simultaneous compensation data generation unit 1263 may also generate compensation data for the compensation pixels. The compensation data may be a difference between the detected luminance and the standard luminance, and the compensation data may also be a luminance correction value for compensating the luminance difference.
The other structures are the same as those of embodiment 1, and are not described again here.
Example 3
As shown in FIG. 4 ~ 8, a method for adjusting the brightness of a display device comprises
A first image display stage of outputting first input image data to the display part 110 with a predetermined number of pixels;
and a compensation pixel output stage, which is used for forming the detected brightness according to the first input image data, and generating compensation data corresponding to the compensation pixel according to the brightness difference value when the brightness difference value between the detected brightness and the standard brightness exceeds the standard value.
A compensation data generation unit 1263 for generating a luminance platform S capable of displaying the luminance of each pixel; the compensation data generation unit 1263 may generate a luminance table on which the test image is mapped so as to correspond to the luminance of each pixel at the pixel position. The luminance plateau and the resolution standard of the display unit 110 are consistent with each other.
The compensation data generation unit 1263 may set a standard luminance S of each pixel in the luminance table; the standard luminance is a detected luminance at a certain position in the upper, lower, left, right, and diagonal adjacent pixels within a position specification range (for example, nxn window) of each pixel. The position of the adjacent pixel set as the standard luminance may be set in advance, or the standard pixel may be the average luminance of the adjacent pixels in more than one place.
The compensation data generation section 1263 may calculate a difference S between the detected luminance and the standard luminance of each pixel.
The compensation data generation unit 1263 outputs the compensation pixel S for the pixel having the luminance difference value exceeding the standard value.
The compensation data generation unit 1263 generates compensation data based on a difference between the luminance of the compensation pixel and the average luminance of the test image, that is, the compensation data is a difference between the luminance of the compensation pixel and the average luminance of the test image.
The left side of fig. 7(al) shows a test image at a specific level on the display device, and the right side of fig. 7(a2) is a luminance chart measured with reference to a test image designation line; in the right graph, the X-axis shows pixel position and the Y-axis shows luminance.
In the luminance chart of fig. 7(a2), the luminance difference between the blocks of the adjacent pixels of the test image will exceed the standard value. In order to ensure that the luminance difference value between adjacent pixels in the test image does not exceed a standard value, a driving part of the display device outputs a correction pixel required by luminance correction; correction data for the correction pixels can be generated and stored at the same time.
The left side of fig. 7(bl) is a test image displayed at a specific level in the display device, and the right side of fig. 7(b2) is a luminance chart measured with reference to a specified line L of the test image; in the left graph, the X-axis shows pixel position and the Y-axis shows luminance.
In the luminance chart of fig. 7(b2), the luminance difference between the blocks of the neighboring pixels of the test image will be lower than the standard value. In this case, even when the pixel luminance at the center of the specified line L2 exceeds the luminance difference value of the maximum luminance on the specified line L2, the display device does not need to perform luminance correction when the luminance difference value of the adjacent pixel is lower than the standard value.
Referring to fig. 7 and 8, the compensation data generation unit 1263 generates a luminance distribution map S that can display the luminance distribution of the test image; the compensation data generating unit 1263 may generate a luminance distribution map of the test image showing the number of pixels in each luminance at the same time.
The compensation data generation unit 1263 may set the center luminance CB having the highest frequency in the luminance distribution map used as the standard luminance.
The compensation data generation section 1263 may calculate a difference S between the detected luminance and the standard luminance of each pixel.
The compensation data generation unit 1263 outputs a compensation pixel S for a pixel whose luminance difference value exceeds a standard value; pixels in the luminance ranges of R and R as shown in the figure are used as compensation pixels to be output to the outside.
The compensation data generation unit 1263 generates compensation data based on a difference between the compensation pixel luminance and the center luminance CB of the test image. For example, the compensation data may be a difference between the luminance of the compensation pixel and the center luminance CB of the test image.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A display device, characterized in that: the display device comprises a display part (110), a control part (128) and a compensation part (126), wherein the control part (128) and the compensation part (126) are electrically connected with the display part (110), the control part (128) is used for inputting first input image data to the display part (110), the display part (110) is used for detecting the first input image data and forming detected luminance according to the first input image data, and the compensation part (126) is used for generating compensation pixels according to the luminance difference value when the luminance difference value of the detected luminance and standard luminance exceeds a standard value.
2. A display device as claimed in claim 1, characterized in that: the number of the display parts (110) is multiple, and the display parts (110) are mutually connected.
3. A display device as claimed in claim 2, characterized in that: the control unit (128) includes a data correction unit for transmitting luminance correction data to the display unit (110).
4. A display device as claimed in claim 1, characterized in that: the compensation unit (126) includes an encoder (1261), a memory (1267), and a decoder (1269), the encoder (1261) includes a compensation data generation unit (1263) and a compression unit (1265), and the decoder (1269), the compensation data generation unit (1263), and the compression unit (1265) are connected to the memory (1267).
5. A display device as claimed in claim 1, characterized in that: the display device further includes a driver (120A) including a scan driver (122) and a source driver (124), the scan driver (122) and the source driver (124) each being connected to the display section (110).
6. A method for adjusting luminance of a display device includes
A first image display stage for outputting first input image data to a display part (110) with a preset number of pixels;
and a compensation pixel output stage, which is used for forming the detected brightness according to the first input image data, and generating compensation data corresponding to the compensation pixel according to the brightness difference value when the brightness difference value between the detected brightness and the standard brightness exceeds the standard value.
7. The luminance adjusting method of a display device according to claim 6, wherein: the compensated pixel output stage further comprises:
generating a luminance plane mapped to pixel positions of the detected luminance;
and setting at least one neighboring pixel neighboring the pixel corresponding to the detected luminance, and setting the luminance corresponding to the neighboring pixel as the standard luminance.
8. The luminance adjusting method of a display device according to claim 6, wherein: the compensated pixel output stage further comprises:
generating a luminance distribution map of the first input image data;
setting the center luminance of the luminance profile as the standard luminance.
9. The luminance adjusting method of a display device according to claim 6, wherein: the first image display stage further comprises:
receiving the global brightness of the first input image data;
-transmitting luminance correction data to the display part (110), the luminance correction data being used to correct a global luminance difference in the display part (110).
10. The luminance adjusting method of a display device as claimed in claim 9, wherein: the global luminance is an average luminance or a center luminance of the first input image data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910946854.1A CN110599950A (en) | 2019-10-07 | 2019-10-07 | Display device and luminance adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910946854.1A CN110599950A (en) | 2019-10-07 | 2019-10-07 | Display device and luminance adjusting method thereof |
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| CN110599950A true CN110599950A (en) | 2019-12-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179818A (en) * | 2020-02-22 | 2020-05-19 | 禹创半导体(广州)有限公司 | Micro LED display device |
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2019
- 2019-10-07 CN CN201910946854.1A patent/CN110599950A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179818A (en) * | 2020-02-22 | 2020-05-19 | 禹创半导体(广州)有限公司 | Micro LED display device |
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