CN110120190B - Micro LED display panel and control method thereof - Google Patents
Micro LED display panel and control method thereof Download PDFInfo
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- CN110120190B CN110120190B CN201910285036.1A CN201910285036A CN110120190B CN 110120190 B CN110120190 B CN 110120190B CN 201910285036 A CN201910285036 A CN 201910285036A CN 110120190 B CN110120190 B CN 110120190B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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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]
Abstract
The invention provides a Micro LED display panel and a control method thereof, wherein a plurality of Micro LED pixel units are arranged on the Micro LED display panel in an array mode, and each Micro LED pixel unit comprises 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels. According to the technical scheme, in each Micro LED pixel unit, the Micro LED display panel compensates the red light spectrum in the white field color temperature by adding 1 red sub-pixel, and the Micro LED display panel consists of the RGBR four sub-pixel points.
Description
Technical Field
The invention relates to the technical field of LEDs, in particular to a Micro LED display panel and a control method thereof.
Background
Micro LED technology, i.e. LED scaling and matrixing technology. The LED display screen is a high-density micro-sized LED array integrated on a chip, for example, each pixel of the LED display screen can be addressed and independently driven to be lightened, and can be regarded as a miniature version of an outdoor LED display screen, and the distance between pixel points is reduced from a millimeter level to a micron level. The Micro LED display is that the bottom layer is made into an LED display driving circuit by a normal CMOS integrated circuit manufacturing process, and then an MOCVD machine is used for manufacturing an LED array on the integrated circuit, thereby realizing a miniature display screen, namely a reduced version of the LED display screen.
Different from an LCD (liquid crystal display), a Micro LED belongs to current type driving, due to different characteristics of LED semiconductor materials of three primary colors of red, green and blue RGB and the existence of spectral light visual effect curves, the difference of luminous effects of RGB three-color chips is large, infrared spectrums generated by red light chips need to be compensated to meet the white field color temperature of 8000K-12000K of a display screen, and at the moment, the driving current of the red light chips is much larger and is about 3-5 times of that of green light chips. The difference of the driving current among the three RGB sub-pixel points is large, the driving circuit is difficult to design and can cause the system to be unstable, and black spots are easy to appear in the display.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the above defects in the prior art, an object of the present invention is to provide a Micro LED display panel and a control method thereof, which are used to solve the technical problems of large driving current difference between sub-pixels of the existing Micro LED display panel and unstable display.
The technical scheme of the invention is as follows:
the Micro LED display panel is characterized in that a plurality of Micro LED pixel units are arranged on the Micro LED display panel in an array mode, and each Micro LED pixel unit comprises 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels.
The Micro LED display panel is characterized in that the 1 blue sub-pixel, the 1 green sub-pixel and the 2 red sub-pixels are arranged in a shape of Chinese character tian.
The Micro LED display panel, wherein, 2 red sub-pixels are arranged diagonally.
The Micro LED display panel, wherein, 2 red sub-pixels vertically set up side by side.
The Micro LED display panel, wherein, 2 red sub-pixels are arranged side by side and transversely.
The Micro LED display panel is characterized in that the size of the Micro LED pixel unit is 1-100 μm.
A control method of a Micro LED display panel comprises the following steps:
displaying by adopting 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels in a Micro LED pixel unit;
when the white field color temperature displayed by the Micro LED pixel unit does not reach the preset white field color temperature range, 2 red sub-pixels are started, and white field color temperature compensation is carried out by adjusting the driving current among the 2 red sub-pixels.
The control method comprises the step of controlling the preset white field color temperature range to be 8000- & ltSUB & gt 12000K.
In the control method, the blue sub-pixel, the green sub-pixel and the red sub-pixel are driven by different power supplies respectively.
Has the advantages that: the invention provides a Micro LED display panel and a control method thereof, wherein a plurality of Micro LED pixel units are arranged on the Micro LED display panel in an array mode, and each Micro LED pixel unit comprises 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels. According to the technical scheme, in each Micro LED pixel unit, the Micro LED display panel compensates the red light spectrum in the white field color temperature by adding 1 red sub-pixel, and the Micro LED display panel consists of the RGBR four sub-pixel points.
Drawings
Fig. 1 is a schematic structural diagram of a conventional Micro LED pixel unit;
FIG. 2 is a schematic structural view of a Micro LED display panel according to the present invention;
FIG. 3 is a schematic structural diagram of a Micro LED pixel unit according to the present invention;
FIG. 4 is a schematic structural diagram of another Micro LED pixel unit according to the present invention;
FIG. 5 is a schematic structural diagram of another Micro LED pixel unit according to the present invention;
FIG. 6 is a flowchart of a control method for a Micro LED display panel according to the present invention.
Detailed Description
The invention provides a Micro LED display panel and a control method thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and more clear. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The LED is a solid semiconductor device capable of converting electric energy into visible light, and the LED has advantages of small size, long service life, low energy consumption, and the like, and thus is widely used in the fields of display, illumination, and the like. In the technical field of LED display, according to the principle of three primary colors of red, green and blue (RGB), different colors of light emitted by LED light sources can be combined into different colors by utilizing the LED light sources with different light emitting colors, so that the light emitting combination of a plurality of LEDs is controlled, and the plurality of LEDs realize rich and colorful dynamic change effects and various images. In the related art, an LED display panel has a plurality of LEDs, and a plurality of LEDs respectively emitting red light, green light, and blue light are arranged on the same panel according to a certain rule, so that the LED display panel can display various images.
Micro LED technology, i.e. LED scaling and matrixing technology. The LED display screen is a high-density micro-sized LED array integrated on a chip, for example, each pixel of the LED display screen can be addressed and independently driven to be lightened, and can be regarded as a miniature version of an outdoor LED display screen, and the distance between pixel points is reduced from a millimeter level to a micron level. The Micro LED display is that the bottom layer is made into an LED display driving circuit by a normal CMOS integrated circuit manufacturing process, and then an MOCVD machine is used for manufacturing an LED array on the integrated circuit, thereby realizing a miniature display screen, namely a reduced version of the LED display screen.
Micro LEDs are a new type of display technology, with the same high gamut and high contrast as OLEDs, but with higher brightness, better reliability and lifetime than OLEDs. The existing novel display Micro LED comprises three RGB chips, each pixel point is independently driven by RGB three-primary-color sub-pixel points, and the spectrum of each color is balanced by mainly adjusting the magnitude of the driving current of the RGB chips, see FIG. 1. the technical scheme only comprises 1 red sub-pixel, 1 green sub-pixel and 1 blue sub-pixel, and the red sub-pixel, the green sub-pixel and the blue sub-pixel are sequentially arranged, for example, are sequentially transversely arranged or longitudinally arranged according to red, green and blue, and form a plurality of rows or a plurality of columns.
Referring to fig. 2, a plurality of Micro LED pixel units 10 are arranged on the Micro LED display panel in an array manner, and referring to fig. 3 to 5, each Micro LED pixel unit includes 1 blue sub-pixel, 1 green sub-pixel, and 2 red sub-pixels. In a specific implementation manner, the Micro LED pixel unit in the technical scheme of the present invention is a Micro LED chip light emitting unit, wherein a blue sub-pixel may be composed of a blue LED chip, a green sub-pixel may be composed of a green LED chip, a red sub-pixel may be composed of a red LED chip, and three different color LED chips are respectively connected to different driving power supplies. According to the Micro LED display panel, the spectrum of red light is compensated by adding 1R sub pixel point, the mixed spectrum of RGB of each pixel point is balanced, and the picture display quality is improved.
The novel display Micro LED driving mode at the present stage mainly has two types, one type is that the three primary colors RGB chip is driven by different driving power supplies separately, and the driving mode has the characteristics of high efficiency and high color rendering. However, because the light effect difference of the RGB three-color chips is large, the light emitting efficiency of the red light chip is low, and the white field color temperature of the display screen is 8000K-12000K, most of the driving modes currently compensate the red light spectrum by increasing the driving current of the red light chip, the driving current of the red light chip is about 3-5 times of the current of the green light chip, the difficulty is increased for the design of the driving circuit due to the difference of the currents, the instability of the system can be caused, and the black spot is easy to appear in the display.
In order to solve the technical problems, according to the technical scheme, the spectrum of R sub-pixel points compensating red light is added on the basis of the original RGB pixel to form an RGBR pixel unit, and the mixed spectrum of RGB of each pixel point is balanced, so that the picture display quality is improved.
Referring to fig. 3 to 5, in a preferred embodiment, the 1 blue sub-pixel, the 1 green sub-pixel, and the 2 red sub-pixels are arranged in a checkerboard pattern. In this case, the blue sub-pixel, the green sub-pixel and the red sub-pixel are all rectangles, 4 rectangles are spliced to form a grid-shaped structure, and the grid-shaped structure is formed among the sub-pixels, so that the space on the Micro LED display panel can be fully utilized, and meanwhile, the arrangement of the sub-pixels on the Micro LED display panel is facilitated. In one case, the field-shaped Micro LED pixel units in the technical solution of the present invention may also be arranged in an inclined manner, that is, the Micro LED pixel units are arranged in an inclined manner of 45 degrees inclined on the basis of the original positive matrix arrangement. In such embodiments, the pitch between pixels may be further reduced using the slanted arrangement, thereby increasing the pixel density. Each pixel unit may include a green pixel sub-unit, a blue pixel sub-unit and two red pixel sub-units, and according to this arrangement, the number of the green pixel sub-units and the blue pixel sub-units is smaller than that of the red pixel sub-units, and when 4 sub-pixels are displayed simultaneously, color cast is easily generated due to the large number of red pixels, so that in one case, each of the green pixel sub-units and the blue pixel sub-units may include more pixels, and the red pixel sub-units may include fewer pixels, and at this time, when displaying is performed, more of each of the green pixels and the blue pixels may be lit so that the number of the three color pixels is substantially the same when lighting. And the light emitting uniformity of the Micro LED pixel unit after infrared spectrum compensation is improved.
Of course, the arrangement of all sub-pixels in the technical solution of the present invention is not limited to the field type, and can also be set according to the actual requirement, for example, in another case, the blue, green and red sub-pixels are all triangles, three triangles make up one large triangle, in this case, the small triangle at the center of the large triangle is preferably set as the red sub-pixel, and at this time, when infrared spectrum compensation is needed, white light emitted by the whole Micro LED pixel unit is more uniform and stable, and similarly, because when the 4 sub-pixels are started simultaneously, the proportion of the red sub-pixels is large, in order to prevent the color cast phenomenon of the LED caused by the overlarge compensation range, it is preferable that the area occupied by the sub-pixels of the small triangle in the middle of the large triangle is half of the area occupied by the sub-pixels of the three triangles on the outer circle.
According to the technical scheme, the size of each Micro LED pixel unit is 1-100 micrometers, compared with a common LED pixel, the size of each Micro LED pixel is approximately 1% of the size of the common LED pixel, and the distance between two adjacent Micro LED pixels is smaller, so that the pixel density of a Micro LED display panel can be improved, and the display quality of the Micro LED display panel is improved.
Referring to fig. 3, in a preferred embodiment, the 2 red subpixels are diagonally arranged. In a specific embodiment, the Micro LED pixel unit has a size of 40 μm, each of the sub-pixels has a size of 10 μm, and 2 red sub-pixels are diagonally arranged, including two diagonal positions, one diagonal position is formed by a first grid and a fourth grid occupying a checkered shape, and the other diagonal position is formed by a second grid and a third grid occupying a checkered shape, wherein the green sub-pixels and the blue sub-pixels are randomly arranged in the remaining two grids, thereby forming a checkered Micro LED pixel unit arrangement.
Referring to fig. 4, in a preferred embodiment, the 2 red subpixels are vertically arranged side by side. In this embodiment, there are two cases, one is that two lattices occupying the left side of the four grid shapes form a vertical arrangement, and the other is that two lattices occupying the right side of the four grid shapes form a vertical arrangement, and the positions of the green sub-pixel and the blue sub-pixel in the same two modes can be arbitrarily set according to actual needs.
Referring to fig. 5, in a preferred embodiment, the 2 red subpixels are laterally disposed side by side. In this embodiment, there are also two cases, one is that the upper two lattices of the four grid shapes form a horizontal arrangement, and the other is that the lower two lattices of the four grid shapes form a horizontal arrangement, and the positions of the green sub-pixels and the blue sub-pixels in the two arrangements can also be arbitrarily set according to actual needs.
In addition, referring to fig. 6, the present invention further provides a method for controlling a Micro LED display panel, comprising the steps of:
s100, displaying by adopting 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels in a Micro LED pixel unit;
in the embodiment that the two red sub-pixels are arranged transversely, the two red sub-pixels are preferably arranged in a pixel arrangement mode below the grid shape, the green sub-pixel is preferably arranged on the left side of the grid shape, and the blue sub-pixel is preferably arranged on the right side of the grid shape, so that the Micro LED pixel is prevented from generating a color difference deviation phenomenon when emitting light.
In the embodiment that the two red sub-pixels are vertically arranged, the pixel arrangement mode that the two red sub-pixels are arranged on the left side of the grid shape is preferable, the preferable green sub-pixel is arranged on the upper side of the grid shape, and the preferable blue sub-pixel is arranged on the lower side of the grid shape, so that color difference deviation when the Micro LED pixel emits light can be effectively prevented.
S200, when the white field color temperature displayed by the Micro LED pixel unit does not reach the preset white field color temperature range, starting 2 red sub-pixels and compensating the white field color temperature by adjusting the driving current among the 2 red sub-pixels. In the implementation mode that 2 red sub-pixels are arranged diagonally, the red sub-pixels can adjust the magnitude of the driving current according to actual needs to drive, so that the best color temperature compensation is achieved, the color temperature can be detected by adopting any existing mode which can be achieved currently.
In a preferred embodiment, the preset white field color temperature range is 8000-12000K.
In a preferred embodiment, the blue sub-pixel, the green sub-pixel and the red sub-pixel are driven by different power sources respectively. In order to realize more precise control, each sub-pixel is controlled by a different power supply, and of course, in this embodiment, the Micro LED display panel of the present invention can realize different color combinations, such as a combination of red and green, a combination of red and blue, and a combination of green and blue, by reasonably selecting to turn on and off the display of any one of the colors and adjusting the magnitude of the driving current of each sub-pixel, and can realize different display effects in specific applications.
In a preferred embodiment, the driving currents of the blue sub-pixel, the green sub-pixel and the red sub-pixel are the same. The existing RGB three-color chip has larger light effect difference, the red light chip has low luminous efficiency, and the requirement that the display screen displays white field color temperature in a certain range is met, most of the existing driving modes compensate red light spectrum by increasing the driving current of the red light chip, the driving current of the red light chip is about 3-5 times of the current of the green light chip, the driving current of each chip has too large difference, the system is easy to be unstable, the service life of each sub-pixel in a Micro LED pixel is different, black spots are easy to appear, and therefore the service life of the Micro LED is shortened.
In summary, the invention provides a Micro LED display panel and a control method thereof, wherein a plurality of Micro LED pixel units are arranged on the Micro LED display panel in an array manner, and each Micro LED pixel unit includes 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels. According to the technical scheme, in each Micro LED pixel unit, the Micro LED display panel compensates the red light spectrum in the white field color temperature by adding 1 red sub-pixel, and the Micro LED display panel consists of the RGBR four sub-pixel points.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A Micro LED display panel is characterized in that a plurality of Micro LED pixel units are arranged on the Micro LED display panel in an array mode, and each Micro LED pixel unit comprises 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels; the blue sub-pixels, the green sub-pixels and the red sub-pixels are all rectangular, and the 1 blue sub-pixels, the 1 green sub-pixels and the 2 red sub-pixels are arranged in a shape of Chinese character tian;
when the white field color temperature displayed by the Micro LED pixel unit does not reach the preset white field color temperature range, starting 2 red sub-pixels and compensating the white field color temperature by adjusting the driving current among the 2 red sub-pixels;
the blue sub-pixel is a blue LED chip, the red sub-pixel is a red LED chip, and the green sub-pixel is a green LED chip.
2. A Micro LED display panel according to claim 1, wherein the 2 red subpixels are diagonally arranged.
3. A Micro LED display panel according to claim 1, wherein the 2 red subpixels are vertically arranged side by side.
4. A Micro LED display panel according to claim 1, wherein the 2 red subpixels are laterally arranged side by side.
5. A Micro LED display panel according to claim 1, wherein the Micro LED pixel cell has a size of 1-100 μ ι η.
6. A control method of a Micro LED display panel is characterized by comprising the following steps:
displaying by adopting 1 blue sub-pixel, 1 green sub-pixel and 2 red sub-pixels in a Micro LED pixel unit;
when the white field color temperature displayed by the Micro LED pixel unit does not reach the preset white field color temperature range, starting 2 red sub-pixels and compensating the white field color temperature by adjusting the driving current among the 2 red sub-pixels;
the blue sub-pixels, the green sub-pixels and the red sub-pixels are all rectangular, and the 1 blue sub-pixels, the 1 green sub-pixels and the 2 red sub-pixels are arranged in a shape of Chinese character tian;
the blue sub-pixel is a blue LED chip, the red sub-pixel is a red LED chip, and the green sub-pixel is a green LED chip.
7. The control method as claimed in claim 6, wherein the predetermined white field color temperature range is 8000- "12000K.
8. The control method according to claim 6, wherein the blue sub-pixel, the green sub-pixel, and the red sub-pixel are driven by different power supplies, respectively.
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| CN113450688A (en) * | 2020-07-09 | 2021-09-28 | 重庆康佳光电技术研究院有限公司 | Display screen compensation method and device and electronic equipment |
| CN114141803B (en) * | 2021-11-17 | 2023-11-28 | 深圳市华星光电半导体显示技术有限公司 | Pixel array and display device |
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