CN113851073A - Miniature LED display device based on redundancy design and dynamic compensation - Google Patents
Miniature LED display device based on redundancy design and dynamic compensation Download PDFInfo
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- CN113851073A CN113851073A CN202010594976.1A CN202010594976A CN113851073A CN 113851073 A CN113851073 A CN 113851073A CN 202010594976 A CN202010594976 A CN 202010594976A CN 113851073 A CN113851073 A CN 113851073A
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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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- 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
Abstract
Miniature LED display device based on redundant design and dynamic compensation relates to miniature LED and shows technical field, the problem that needs a miniature LED display device that can form large-scale production now urgently is solved, including the control unit, motion mechanism and miniature LED display element, miniature LED display element connects the motion mechanism, miniature LED display element's array line number is greater than and shows required line number, the control unit connects motion mechanism and miniature LED display element, the miniature LED display element of control unit control shows, the miniature LED display element motion of control unit through control motion mechanism motion control. The invention enables the original micro LED unit with the dead pixel to work normally, thereby reducing the manufacturing cost of the micro LED display device and the manufacturing time; the complementation of dead pixel pictures is realized through a redundancy design, and the display performance is improved and the power consumption is reduced through the control unit.
Description
Technical Field
The invention relates to the technical field of micro LED display, in particular to a micro LED display device based on redundancy design and dynamic compensation.
Background
The micro LED generally refers to an array chip with a chip size of 1-100 μm. However, the micro LED display device has a technical bottleneck in the manufacturing process, i.e. a huge amount of transfer technology. Due to two main reasons of defects of an LED epitaxial layer and process defects of interconnection with a driving circuit, the micro LED inevitably has dead spots. The conventional micro LED dead pixel repairing technical means is lack, so that the production cost of a micro LED display chip is high, the yield is low, large-scale production cannot be realized, and the micro LED display chip enters the market supply of downstream products. Therefore, the micro LED display chip is not formed into a large-scale product at present.
Disclosure of Invention
In order to solve the problem that the micro LED chip with the dead pixel cannot be applied, the invention provides the micro LED display device based on the redundancy design and the dynamic compensation, and the micro LED display device with the dead pixel can be used.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the miniature LED display device based on the redundancy design and the dynamic compensation comprises a control unit, a motion mechanism and a miniature LED display unit, wherein the miniature LED display unit is connected with the motion mechanism, the number of rows and the number of columns of an array of the miniature LED display unit are larger than the number of rows and the number of columns required for display, the control unit is connected with the motion mechanism and the miniature LED display unit, the control unit controls the miniature LED display unit to display, and the control unit controls the miniature LED display unit to move by controlling the motion mechanism to move.
The working process of the micro LED display device based on the redundancy design and the dynamic compensation within a frame frequency comprises the following steps:
s1, the control unit sends a first display instruction to the micro LED display unit;
s2, turning off the micro LED display unit after responding to the first display instruction to display the image;
s3, the control unit sends a motion instruction to the motion mechanism;
s4, the movement mechanism responds to the movement instruction to drive the micro LED display unit to move, and after the movement, the qualified point of the micro LED display unit is located at the position corresponding to the dead pixel in S2;
s5, the control unit sends a second display instruction to the micro LED display unit;
s6, the micro LED display unit responds to the display instruction and turns off after the image display is carried out in the two pairs of S2;
the image displayed at S2 and the image displayed at S6 constitute an image that the human eye observes as being complete, utilizing the effect of human eye persistence of vision.
The invention has the beneficial effects that:
the miniature LED display device based on the redundancy design and the dynamic compensation enables the original miniature LED unit with the dead pixel to work normally through the control unit and the movement mechanism, and the miniature LED display device with the dead pixel can be applied without adopting a dead pixel repairing means. The invention reduces the manufacturing cost and the manufacturing time of the micro LED display device, can form large-scale production, and lays a technical foundation for the production of the micro LED. The invention realizes the complementation of dead pixel pictures through redundancy design, and improves the display performance and reduces the power consumption through the control unit.
Drawings
Fig. 1 is a schematic structural diagram of a micro LED display device based on redundancy design and dynamic compensation according to the present invention.
Fig. 2 is a structural diagram of a micro LED display unit of a micro LED display device based on a redundancy design and dynamic compensation according to the present invention.
Fig. 3 is a structural diagram of a moving mechanism of a micro LED display device based on a redundancy design and dynamic compensation according to the present invention.
Fig. 4 is a schematic diagram illustrating the operation of the micro LED display device based on redundancy design and dynamic compensation according to the present invention.
In the figure: 1. the LED display device comprises a micro LED display unit, 2, a motion mechanism, 3, a control unit, 4, a micro LED array chip, 5, a driving circuit, 6, a fixed end, 7, a frame, 8, a first direction driving mechanism, 9, a second direction driving mechanism, 10 and a base.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The miniature LED display device based on redundancy design and dynamic compensation is a miniature LED display device structure with a dynamic compensation function, as shown in FIG. 1, and comprises a control unit 3, a motion mechanism 2 and a miniature LED display unit 1. The micro LED display unit 1 comprises a driving circuit 5 and a micro LED array chip 4 arranged on the driving circuit 5, wherein the micro LED array chip 4 is connected with the driving circuit 5. The micro LED display unit 1 is connected with the movement mechanism 2 and is positioned on the movement mechanism 2, and the micro LED display unit 1 moves through the movement mechanism 2 to realize position change. The control unit 3 is connected to the micro LED display unit 1 and is configured to control the micro LED display unit 1 to display an image. The control unit 3 is connected with the movement mechanism 2, and the control unit 3 controls the movement mechanism 2 to move so that the miniature LED display unit 1 moves.
The micro LED array chip 4 adopts a redundancy design, the number of rows of the micro LED array chip 4 is larger than the number of rows required by display, and the number of columns of the micro LED array chip 4 is larger than the number of columns required by display. The number of rows and columns of the display required is M × N (the number of rows and columns of the display required is M, and the number of columns and columns of the display required is N), and the number of rows and columns of the actually manufactured chip is (M + s) × (N + t), that is, the micro LED array chip 4 of the present invention is an (M + s) × (N + t) array, where M, N, s and t are integers greater than or equal to 1, usually M and N are both greater than 1, and s and t are both greater than or equal to 1.
The micro LED array chip 4 is provided with at least one dead pixel, the micro LED array chip 4 comprises a qualified point and a dead pixel, the qualified point is a micro LED chip with a normal function and a micro LED chip capable of displaying, and the dead pixel is a micro LED chip with an abnormal function, for example, the micro LED chip is not electrically connected with the driving circuit 5. The control unit 3 is used for designing a reasonable motion compensation position, namely a reasonable motion instruction of the motion mechanism 2 according to the position information of the dead pixel when the micro LED display unit 1 leaves the factory, so that the qualified point of the micro LED display unit 1 after motion is located at the position corresponding to the dead pixel before motion. That is: the control unit 3 can control the motion mechanism 2 to drive the micro LED display unit 1 to move (including reset after moving); and after the micro LED display unit 1 moves, the qualified point on the micro LED display unit is positioned at the position corresponding to the dead point on the micro LED display unit before the movement.
The micro LED display device based on the redundancy design and the dynamic compensation works to display a needed image firstly, and the micro LED array chip 4 has at least one dead pixel so that the image has defects; then, in a short time, the control unit 3 moves the micro LED array chip 4 through the moving mechanism 2 (the micro LED array chip 4 moves, that is, the micro LED array chip 4 is displaced), so that the micro LED chip with normal function moves to the position of the original dead point and displays an image. By using the persistence effect of human vision, a complete image is observed by human eyes.
Fig. 2 is a schematic structural diagram of the micro LED display unit 1. The number of pixels of the micro LED array chip 4 is m multiplied by n, wherein m and n are arbitrary integers; one or more LED chips may be included in one pixel unit, and the multiple LED chips may include multiple different light emitting wavelengths, for example, each micro LED array chip 4 is formed by stacking multiple wavelength LED elements, that is, the micro LED array chip 4 may be monochromatic or multicolor. The drive circuit 5 is not limited and may be in the form of a CMOS, TFT or passive drive circuit 5. The motion mechanism 2 can drive the micro LED display unit 1 to perform one-dimensional motion or two-dimensional motion. The form of the motion mechanism 2 is not limited, and may be a lead screw, a slide rail, a piezoelectric drive, or the like.
The movement mechanism 2 can make the micro-LED display unit 1 perform one-dimensional movement or two-dimensional movement. The one-dimensional motion is that the micro LED display unit 1 can move along the row direction or the column direction of the array of micro LED array chips 4. The one-dimensional motion may also be in a direction diagonal to the array. The two-dimensional movement is specifically a movement of the micro LED display unit 1 along a first direction and a second direction, the first direction and the second direction have an included angle, and other movement directions such as a third movement direction may also be included, and it is preferable that the first direction is an X-axis direction and the second direction is a Y-axis direction. The motion mechanism 2 comprises a motion part and a driving part, the driving part drives the motion part to move, the micro LED display unit 1 is installed on the motion part, and the driving part can adopt single driving or multiple driving.
The following description exemplifies the movement mechanism 2, but the movement mechanism 2 is not limited to the following configuration.
Fig. 3 shows a schematic structural diagram of an embodiment of the first motion mechanism 2: the moving mechanism 2 includes a fixed end 6, a frame 7, a base 10, a first direction driving mechanism 8, and a second direction driving mechanism 9. The fixed end 6 and the frame 7 are connected by a first direction driving mechanism 8, and the frame 7 is movable in a first direction by the first direction driving mechanism 8. The first direction driving mechanism 8 may be a lead screw, a slide rail, or a piezoelectric ceramic. The base 10 is connected to the frame 7 by a second direction driving mechanism 9, and the base 10 is movable in a second direction by the second direction driving mechanism 9. The second direction driving mechanism 9 may be a lead screw, a slide rail, or a piezoelectric ceramic. The base 10 is connected to the micro LED display unit 1. The first direction driving mechanism 8 and the second direction driving mechanism 9 are connected to the control unit 3. The control unit 3 controls the first direction driving mechanism 8 to realize that the base 10 and the micro LED display unit 1 on the base 10 move along the first direction, and the control unit 3 controls the second direction driving mechanism 9 to realize that the base 10 and the micro LED display unit 1 on the base 10 move along the second direction.
The working process of the micro LED display device based on the redundancy design and the dynamic compensation in one frame frequency comprises the following steps:
s1, the micro LED display unit 1 is located at the first position, and the control unit 3 sends a first display instruction to the micro LED display unit 1;
s2, the micro LED display unit 1 responds to the first display instruction, and the micro LED display unit 1 is turned off after one frame of image is displayed; the image displayed in S2 has a certain defect, i.e., a dead pixel does not display an image;
s3, the control unit 3 sends a motion instruction to the motion mechanism 2;
s4, the movement mechanism 2 responds to the movement instruction to drive the micro LED display unit 1 to move to reach the second position;
after the micro LED display unit 1 moves, the qualified point of the micro LED display unit 1 is positioned at the position corresponding to the defective point of the micro LED display unit 1 in S1 and S2 (before the movement);
s5, the control unit 3 sends a second display instruction to the micro LED display unit 1;
s6, the micro LED display unit 1 responds to the display instruction II, and the micro LED display unit 1 is turned off after one frame of image is displayed;
the images displayed in S2 and S6 are pieced together to form a complete image, and the human eye observes the complete image by using the effect of visual persistence of the human eye, that is, the image displayed in S6 and the image displayed in S2 are overlapped to form the complete image.
The above S2 and S6 display the same frame image.
The LEDs that participate in the display in the micro LED display unit 1 when S6 is executed and the LEDs that participate in the display in the micro LED display unit 1 when S2 is executed are not all the same or all different.
The specific process of redundancy design and dynamic compensation of the present invention is described below with reference to fig. 4:
assuming that the number of arrays required by the micro LED display is 2 × 2, the number of arrays of the micro LED display unit 1 is 4 × 4, and assuming that one dead pixel exists in the 2 × 2 array required to be displayed, the LED adjacent to the right side of the dead pixel is a qualified point. After the image of the X-th frame is displayed, it is assumed that the X + 1-th frame is desired to have the 2 × 2 array (LEDs positioned within the dashed-line box corresponding to the position one in fig. 4) all lit. Then, when the micro LED display unit 1 is at the first position, the control unit 3 controls the micro LED display unit 1 to light the 2 × 2 LEDs in the dashed-line frame corresponding to the first position in fig. 4, and at this time, the lower right corner in the dashed-line frame cannot be displayed because of the dead pixel, and thus, a completely lighted image is not obtained. And then the control unit 3 controls the movement mechanism 2 to move the micro LED display unit 1 one step to the left, the micro LED display unit 1 moves to the second position, and at the moment, the adjacent qualified point LED on the right side of the dead point LED is positioned at the position corresponding to the dead point LED at the first position. The control unit 3 then controls the micro LED display unit 1 to light the 2 × 2LED array (the dashed box corresponding to position two in fig. 4) within the dashed line at this time. The two images are superposed by using the persistence effect of human eyes to form a 2 x 2 image with a lighting effect. And then displaying the image of the (X + 2) th frame, wherein X is a positive integer, and realizing the complete display of the (N + 2) th frame by being similar to the above process.
The control unit 3 has an intelligent analysis and judgment function according to the position information of the dead pixel of the micro LED display unit 1 and the image information displayed in each frame, the control unit 3 can analyze and judge whether the micro LED display unit 1 needs to be displaced or not, and the direction of the displacement, and the control unit 3 controls the movement mechanism 2 to drive the micro LED display unit 1 to move and control the micro LED display unit 1 to display according to the analysis and judgment result so as to achieve the purposes of low power consumption and high performance.
Obviously, the micro LED display device of the invention does not limit whether the micro LED display unit has a dead pixel, all the micro LED display units are manufactured according to a redundancy design, and the micro LED display unit 1 without the dead pixel on the motion mechanism 2 can also normally display.
The micro LED display device based on the redundancy design and the dynamic compensation enables the original micro LED unit with the dead pixel to work normally through a dynamic compensation method, and the micro LED display device 1 with the dead pixel can be applied without adopting a dead pixel repairing means. The invention reduces the manufacturing cost and the manufacturing time of the micro LED display device and lays a technical foundation for the production of the micro LED. The micro LED display device realizes the complementation of dead pixel pictures through redundancy design, improves the display performance and reduces the power consumption through an intelligent program of the control unit 3.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. Miniature LED display device based on redundant design and dynamic compensation, its characterized in that, including control unit (3), motion (2) and miniature LED display element (1), motion (2) are connected in miniature LED display element (1), and the array line number of miniature LED display element (1) is greater than and shows required line number, the line number is greater than and shows required line number, and motion (2) and miniature LED display element (1) are connected in control unit (3), and control unit (3) control miniature LED display element (1) show, and control unit (3) are through controlling motion (2) motion control miniature LED display element (1) motion.
2. The micro LED display device based on redundancy design and dynamic compensation of claim 1, wherein the micro LED display unit (1) is a micro LED display unit (1) having a dead pixel.
3. The micro LED display device based on redundancy design and dynamic compensation as claimed in claim 2, wherein the control unit (3) analyzes and judges whether the micro LED display unit (1) requires movement, a movement direction and a movement step number according to the position information of the dead pixel on the micro LED display unit (1) and the image information required to be displayed for each frame, and controls the movement mechanism (2) to operate according to the analysis and judgment result.
4. The miniature LED display device based on redundant design and dynamic compensation as claimed in claim 2, wherein said control unit (3) is configured to control the movement mechanism (2) to move to realize the movement of the miniature LED display unit (1), and after the movement of the miniature LED display unit (1), the qualified point of the miniature LED display unit (1) is located at the position corresponding to the defective pixel of the miniature LED display unit (1) before the movement.
5. The micro LED display device based on redundant design and dynamic compensation of claim 1, wherein the control unit (3) controls the micro LED display unit (1) on the moving mechanism (2) to perform one-dimensional or two-dimensional movement.
6. The micro LED display device based on redundant design and dynamic compensation of claim 5, wherein the moving mechanism (2) comprises a fixed end (6), a frame (7), a base (10), a first direction driving mechanism (8) and a second direction driving mechanism (9). The fixed end (6) is connected with the frame (7) through the first direction driving mechanism (8), the base (10) is connected with the frame (7) through the second direction driving mechanism (9), the base (10) is connected with the micro LED display unit (1), and the first direction driving mechanism (8) and the second direction driving mechanism (9) are connected with the control unit (3).
7. The miniature LED display device based on redundant design and dynamic compensation of claim 5, wherein said moving mechanism (2) employs a lead screw, a slide rail or a piezoelectric ceramic.
8. The micro LED display device based on redundant design and dynamic compensation of claim 1, wherein the operation of the display device within a frame rate comprises the steps of:
s1, the control unit (3) sends a first display instruction to the micro LED display unit (1);
s2, turning off the micro LED display unit (1) after responding to the first display instruction to display the image;
s3, the control unit (3) sends a motion instruction to the motion mechanism (2);
s4, the movement mechanism (2) responds to the movement instruction to drive the micro LED display unit (1) to move, and after the movement, the qualified point of the micro LED display unit (1) is located at the position corresponding to the defective point in S2;
s5, the control unit (3) sends a second display instruction to the micro LED display unit (1);
s6, the micro LED display unit (1) responds to the display instruction and turns off the display unit after the image display in the two pairs of S2;
the image displayed at S2 and the image displayed at S6 constitute an image that the human eye observes as being complete, utilizing the effect of human eye persistence of vision.
9. The micro LED display device based on redundant design and dynamic compensation of claim 8, wherein the S2 and S6 perform display of the same frame image.
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