LED display structure and display screen

Abstract

An embodiment of the present invention discloses an LED display structure and a display screen, wherein the LED display structure includes: a PCB board; a plurality of light-emitting pixels disposed on the PCB board and arranged in an array in rows and columns, each light-emitting pixel including a plurality of LED lamp beads; if the common terminals of the LED lamp beads of the same light-emitting color in each row of the light-emitting pixels are electrically connected to form a scan line, then the non-common terminals of the LED lamp beads in each column of the light-emitting pixels are electrically connected to form at least one data line; if the common terminals of the LED lamp beads of the same light-emitting color in each column of the light-emitting pixels are electrically connected to form a scan line, then the non-common terminals of the LED lamp beads in each row of the light-emitting pixels are electrically connected to form at least one data line. The present invention not only eliminates the need to increase the frequency to achieve the clarity of the LED display, reduces time redundancy, but also reduces the manufacturing cost of the LED display.

Description

Technical Field

[0001] The present invention relates to the field of LED display technology, and in particular to an LED display structure and a display screen. Background Art

[0002] Microdisplay technology is an emerging display technology. The emergence of microdisplay technology has greatly facilitated the design of industrial products, reduced the space occupied by displays, reduced the power consumption of portable products, and extended the battery life of equipment. It has very wide applications in both military and civilian industries.

[0003] Based on the light-emitting principle, microdisplay technology can be divided into CRT (Cathode Ray Tube) display, DMD (Digital Mirror Device) display, LCD display, LCoS (Liquid Crystal on Silicon) display, OLED-on-Silicon (Organic Light Emitting Diode on Silicon) display, LED (Light Emitting Diode) display, etc.

[0004] Currently, in the field of LED displays, the scanning strategy involves electrically connecting the non-common ends of each row of pixels to form a scan line, and then scanning them row by row and pixel by pixel. This strategy relies on increasing the frequency to achieve high image quality and a high refresh rate. However, while this approach improves image quality, it creates significant time redundancy, increases production costs, and results in a significant waste of resources. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the embodiments of the present invention provide an LED display structure and a display screen, which not only eliminates the need to increase the frequency to achieve the clarity of the LED display, but also reduces the manufacturing cost of the LED display.

[0006] In a first aspect, an embodiment of the present invention discloses an LED display structure, comprising:

[0007] PCB board;

[0008] A plurality of light-emitting pixels are provided on the PCB board and arranged in an array in row and column directions, each of the light-emitting pixels including a plurality of LED lamp beads; wherein, if the common poles of the LED lamp beads of the same light-emitting color in the light-emitting pixels in each row are electrically connected to form a scan line, then the non-common poles of the LED lamp beads in the light-emitting pixels in each column are electrically connected to form at least one data line; if the common poles of the LED lamp beads of the same light-emitting color in the light-emitting pixels in each column are electrically connected to form a scan line, then the non-common poles of the LED lamp beads in the light-emitting pixels in each row are electrically connected to form at least one data line.

[0009] Preferably, in the LED display structure, one of the scan lines is electrically connected to a strobe signal pin of a strobe chip individually.

[0010] Preferably, in the LED display structure, one of the data lines is electrically connected to a data signal pin of the driver chip alone.

[0011] Preferably, in the LED display structure, the common terminal of the LED lamp beads is a common cathode terminal or a common anode terminal.

[0012] Preferably, in the LED display structure, the PCB board includes multiple layers of wiring, and the scan lines and the data lines are located in different layers in the PCB board.

[0013] Preferably, in the LED display structure, all the light-emitting pixels are the same.

[0014] Preferably, in the LED display structure, the common ends of the LED lamp beads of the same luminous color in each row of the luminous pixels are electrically connected to form a scan line, and the non-common ends of the LED lamp beads in each column of the luminous pixels are electrically connected to form a data line.

[0015] Preferably, in the LED display structure, each of the light-emitting pixels includes a red LED lamp bead, a green LED lamp bead and a blue LED lamp bead.

[0016] More preferably, in the LED display structure, the LED lamp beads in the light-emitting pixels are arranged vertically.

[0017] In a second aspect, an embodiment of the present invention further discloses an LED display screen, which includes the LED display structure described in the first aspect.

[0018] Compared with the prior art, the embodiment provides an LED display structure and display screen. By providing a plurality of light-emitting pixels arranged in an array in rows and columns on a PCB board, and providing a plurality of LED lamp beads in each light-emitting pixel, the common poles of the LED lamp beads of the same light-emitting color in each row or column of light-emitting pixels are electrically connected to form a scan line, thereby increasing the number of scan lines in the LED display to improve the image quality of the LED display and reduce a large amount of time redundancy. In addition, if the non-common poles of the LED lamp beads in each row or column of light-emitting pixels are electrically connected to form a data line, the number of driver chips can be greatly reduced. Since the cost of the selection chip is much lower than that of the driver chip, the manufacturing cost of the LED display screen can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of an LED display structure provided by an embodiment of the present invention;

[0021] Figure 2 Another structural schematic diagram of the LED display structure provided by an embodiment of the present invention;

[0022] Figure 3 It is a structural diagram of an LED display structure in the prior art;

[0023] Figure 4 This is a schematic diagram of the structure of LED lamp beads in the LED display structure provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "column", "row", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the present invention, the term "some embodiments" is used to mean "serving as an example, illustration or description". Any embodiment described in this application as exemplary is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other instances, known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles disclosed in this application.

[0027] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the LED display structure provided by an embodiment of the present invention. Figure 2 Another structural diagram of the LED display structure provided by an embodiment of the present invention. Figure 1 and Figure 2 As shown, an embodiment of the present invention discloses an LED display structure, which includes:

[0028] PCB board 10;

[0029] A plurality of light-emitting pixels 20 are provided on the PCB board 10 and arranged in an array in row and column directions;

[0030] Among them, each of the light-emitting pixels 20 includes multiple LED lamp beads, and the common extreme points 201 of the LED lamp beads of the same light-emitting color in each row of the light-emitting pixels 20 are electrically connected to form a scanning line 30, and the non-common extreme points 202 of the LED lamp beads in each column of the light-emitting pixels 20 are electrically connected to form at least one data line 40.

[0031] exist Figure 1 and Figure 2In the LED display structure shown, a plurality of light-emitting pixels 20 arranged in an array in row and column directions are provided on a PCB board 10, and a plurality of LED lamp beads are provided in each light-emitting pixel 20. At the same time, the non-common poles 202 of the LED lamp beads in each column of light-emitting pixels 20 are electrically connected to form one or more data lines 40, and the common poles 201 of the LED lamp beads of the same light-emitting color in each row of light-emitting pixels 20 are electrically connected to form a scan line 30, thereby increasing the number of scan lines 30 in each row of light-emitting pixels 20 by several times, eliminating the need to increase the refresh frequency to achieve the clarity of the LED display, thereby greatly reducing the manufacturing cost of the LED display.

[0032] It should be noted that the scan lines 30 and the data lines 40 in the LED display structure mentioned in the present invention can be interchanged in the row and column directions. Figure 1 and Figure 2 It is merely an example that the common poles 201 of the LED lamp beads of the same luminous color in each row of the luminous pixels 20 are electrically connected to form a scanning line 30, and the non-common poles 202 of the LED lamp beads in each column of the luminous pixels 20 are electrically connected to form one or more data lines 40.

[0033] In addition, if Figure 1 As shown, if the common terminals 201 of the LED lamp beads of the same luminous color in each row of the luminous pixels 20 are electrically connected to form a scan line 30, and the non-common terminals 202 of the LED lamp beads in each column of the luminous pixels 20 are electrically connected to form a data line 40, although the number of scan lines 30 in the LED display screen is increased, thereby increasing the number of strobe chips, the number of scan lines 30 in the LED display screen is significantly reduced, and the overall number of data lines 40 on the PCB board 10 is also reduced. In addition, because the cost of the strobe chip is much lower than that of the driver chip, the manufacturing cost of the LED display screen can be greatly reduced.

[0034] See also Figure 3 , Figure 3 It is a schematic diagram of the structure of LED display structure in the prior art. Figure 3 In the embodiment, after the common poles 201 between the LED lamp beads in each row of light-emitting pixels 20 are electrically connected, only one scanning line 30 is formed, and the non-common poles 202 between the LED lamp beads of the same color in each column of light-emitting pixels 20 are electrically connected to form a data line 40. Figure 3 When the LED display structure shown is scan-driven, it can be clearly seen that only one scan is performed in each row of light-emitting pixels 20, while in the present application, multiple scans are performed in each row of light-emitting pixels 20, thereby making the image in the LED display clearer.

[0035] It can be understood that the LED display structure provided in the embodiment of the present invention is preferably applied to a COB (Chip On Board) display screen, wherein the COB is to perform high-precision bonding of the LED light-emitting chip directly to the PCB board, and connect the driving components on the module carrier board through a medium, that is, the LED lamp beads in the embodiment of the present invention are crystal-fixed on the PCB board.

[0036] It can also be understood that the LED display structure provided by the embodiment of the present invention is not limited to COB display screens, but can also be applied to SMD (Surface Mounted Devices) display screens and IMD (Integrated Matrix Devices) display screens. Among them, SMD is to first package the LED chip into a surface mount device, and then fix these devices to the PCB board through a placement machine. The packaged device can be a single red, green, and blue device, or a group of red, green, and blue devices packaged together; IMD is to integrate two, four, six, or more groups of lamp beads into a small unit, also known as "N-in-one" or "all-in-one", and then fix these all-in-one devices to the PCB board through a placement machine.

[0037] In addition, the LED lamp bead can be provided with one or more illuminators. If the LED lamp bead is provided with multiple illuminators, the LED lamp bead can be provided with two non-common poles 202, and the two illuminators can share a substrate, thereby indirectly increasing the density of LEDs in the LED display screen, and further indirectly increasing the resolution of the LED display screen.

[0038] The following describes in detail the structure of an LED lamp bead having a common terminal 201 and two non-common terminal 202 on the PCB board 10 .

[0039] like Figure 4As shown, two anode substrate pads 112 and one cathode substrate pad 111 are provided on the PCB board 10, wherein the length and width of the anode substrate pad 112 are both 80 microns, and the length of the cathode substrate pad 111 is 160 microns and the width is 80 microns; the LED lamp bead includes a first light-emitting body, a second light-emitting body, a substrate 2011, a first P-type pad 20121, a second P-type pad 20122 and an N-type pad 2013, the N-type pad 2013 is the common cathode end of the LED lamp bead, the first light-emitting body is electrically connected to an anode substrate pad 112 through the first P-type pad 20121, and the second light-emitting body is electrically connected to the second P-type pad 20122. The pad 20122 is electrically connected to another anode substrate pad 112, the first P-type pad 20121 and the second P-type pad 20122 are electrically connected to the anode substrate pad 112 through metal tin, and the N-type pad 2013 is electrically connected to the cathode substrate pad 111 through metal tin. The first light-emitting body and the second light-emitting body are arranged between the substrate 2011 and the PCB board 10. The first light-emitting body and the second light-emitting body are the same and both include a P-type conductive metal layer 2014, an N-type conductive metal layer 2015, a Bragg reflection layer 2016, a current spreading layer 2017, a P-type semiconductor 2018, an N-type semiconductor 2019, and an insulating protective layer 202 0 and an active light-emitting layer 2021, a P-type Bragg reflector through-hole and an N-type Bragg reflector through-hole are provided on the Bragg reflector 2016, a first P-type pad 20121 and a second P-type pad 20122 are electrically connected to their respective P-type conductive metal layers 2014 through the P-type Bragg reflector through-holes, and an N-type pad 2013 is electrically connected to the connecting metal through the N-type Bragg reflector through-holes. The Bragg reflector 2016 is formed by stacking 28 layers of SiO2 and Ti3O5 materials; the P-type semiconductor 2018 has a length of 80 microns and a width of 50 microns, and the N-type semiconductor 2019 has a length of 100 microns and a width of 55 micrometers; a P-type insulating protective layer through hole and an N-type insulating protective layer through hole are provided on the insulating protective layer 2020, the P-type conductive metal layer 2014 is electrically connected to the current spreading layer 2017 through the P-type insulating protective layer through hole, the current spreading layer 2017 is electrically connected to the P-type semiconductor 2018 to excite holes, and the N-type conductive metal layer 2015 is electrically connected to the step of the N-type semiconductor 2019 through the N-type insulating protective layer through hole to excite electrons; the forward projection of the P-type semiconductor 2018 is smaller than the forward projection of the N-type semiconductor 2019, the exposed portion of the N-type semiconductor 2019 serves as a conductive step, and the material of the insulating protective layer is selected from SiO2.

[0040] It is understandable that multiple common poles 201 and one non-common pole 202 can be set on the LED lamp bead, thereby avoiding the technical problem of needing to add through holes on the PCB board 10 to solve the problem when the scan line 30 and the data line 40 cross on the PCB board 10.

[0041] In some embodiments, one of the scan lines 30 is electrically connected to a selection signal pin of the selection chip alone; one of the data lines 40 is electrically connected to a data signal pin of the driver chip alone. Specifically, the selection chip is provided with at least one selection signal pin, that is, a selection chip can be connected to at least one scan line 30 through the selection signal pin to select the LED lamp beads in each row of light-emitting pixels 20; the driver chip is provided with at least one data signal pin, that is, a driver chip can be connected to at least one data line 40 through the data signal pin to perform constant current control on the LED lamp beads in each column of light-emitting pixels 20. Among them, the selection chip and the driver chip can be integrated into one chip, and the selection chip and the driver chip can also be used as a separate chip for scanning and driving. The model of the chip used in this application can be TLC6984 or MBI515.

[0042] In addition, when the LED display structure provided by the embodiment of the present invention is used for LED display, each of the light-emitting pixels 20 is the same, that is, the LED lamp beads at the corresponding positions in each light-emitting pixel 20 are the same, and the LED lamp beads in the light-emitting pixels 20 are arranged vertically. At this time, it is only necessary to use the selection chip to select the scan line 30 row by row, and at the same time use the driving chip to light up each of the LED lamp beads column by column through the data line 40, so that different light-emitting colors and light-emitting brightness can be displayed on the LED display screen, thereby forming a complete image on the LED display screen.

[0043] In some embodiments, the common terminal 201 of the LED lamp bead can be a common cathode terminal or a common anode terminal. Specifically, the common terminal 201 of the LED lamp bead can be determined as a common cathode terminal or a common anode terminal according to actual applications, and is not specifically limited in the embodiments of the present invention. Among them, if the common terminal 201 of the LED lamp bead is a common cathode terminal, after the cathodes of the LED lamp beads of the same luminous color in each row of light-emitting pixels 20 are electrically connected, a scan line 30 is formed, and it is electrically connected to a selection signal pin of the selection chip, and the anode (non-common terminal 202) of each LED lamp bead in each row of light-emitting pixel 20 units is connected in a different way to form at least one data line 40, and each data line 40 is electrically connected to a data signal pin of the driver chip.

[0044] In some embodiments, the PCB board 10 includes multiple layers of routing, and the scan line 30 and the data line 40 are located in different layers of the PCB board 10. Specifically, when routing the PCB board 10 in the LED display structure provided by the embodiment of the present invention, a separate routing can be performed in one layer of the PCB board 10 to form the scan line 30, and a separate routing can be performed in another layer of the PCB board 10 to form the data line 40. The scan line 30 can be located above the data line 40 or below the data line 40. Similarly, routing can be performed in a certain layer of the PCB board 10 to simultaneously form the scan line 30 and the data line 40. When the scan line 30 and the data line 40 are located in the same layer of the PCB board 10, a bridge can be used to connect the scan line 30 and the data line 40 at their intersection. At the same time, when the scan line 30 and the data line 40 intersect, the connection can be achieved by adding a through hole on the PCB board 10.

[0045] In some embodiments, as Figure 1 As shown, the non-common terminals 202 of the LED lamp beads in each column of light-emitting pixels 20 are electrically connected to form a data line 40. Specifically, the non-common terminals 202 of each LED lamp bead in each column of light-emitting pixels 20 are electrically connected to form a data line 40 in each column of light-emitting pixels 20, and are electrically connected to a pin of a driver chip to provide a constant current source to each LED lamp bead in each column of light-emitting pixels 20, thereby reducing the number of driver chips in the LED display screen and thus reducing the cost of manufacturing the LED display screen.

[0046] In addition, in the embodiment of the present invention, the light-emitting pixel 20 can be composed of three LED lamp beads, or it can be composed of four LED lamp beads. When the light-emitting pixel 20 is composed of three LED lamp beads, the three LED lamp beads can be a red LED lamp bead 210, a green LED lamp bead 220, and a blue LED lamp bead 230; when the light-emitting pixel 20 is composed of four LED lamp beads, the four LED lamp beads can be a red LED lamp bead 210, a green LED lamp bead 220, a blue LED lamp bead 230, and a white LED lamp bead.

[0047] The LED display structure provided by the embodiment of the present invention is specifically described below by taking a display unit with 16 columns and 9 rows as an example.

[0048] For example, if each pixel 20 includes a red LED lamp bead 210, a green LED lamp bead 220, and a blue LED lamp bead 230. In the traditional LED display scanning method, the cathodes of the red LED lamp beads 210, the green LED lamp beads 220, and the blue LED lamp beads 230 of each row of pixels 20 are electrically connected to form a scan line 30, the anodes of the red LED lamp beads 210 of each column of pixels 20 are electrically connected to form a data line 40, the anodes of the green LED lamp beads 220 of each column of pixels 20 are electrically connected to form a data line 40, and the anodes of the blue LED lamp beads 230 of each column of pixels 20 are electrically connected to form a data line 40. At this time, the number of data lines 40 required is 16×3=48, the number of scan lines 30 is 9, and a total of 57 signals are required; while the present invention realizes In the LED display scanning method provided in the embodiment, the cathodes of the red LED lamp beads 210 of each row of light-emitting pixels 20 are electrically connected to form a scan line 30, the cathodes of the green LED lamp beads 220 of each row of light-emitting pixels 20 are electrically connected to form a scan line 30, and the cathodes of the blue LED lamp beads 230 of each row of light-emitting pixels 20 are electrically connected to form a scan line 30. The anodes of the red LED lamp beads 210, green LED lamp beads 220, and blue LED lamp beads 230 of each column of light-emitting pixels 20 are electrically connected to form a data line 40. In this case, the number of data lines 40 required is 16, and the number of scan lines 30 is 9×3=27, for a total of 43 signals. It can be seen that the number of signals required on the PCB board 10 in the LED display structure provided in the embodiment of the present invention is greatly reduced, with the reduction ratio reaching 24.56%.

[0049] In addition, an embodiment of the present invention further discloses an LED display screen, which includes the LED display structure described above.

[0050] In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above units or structures can be referred to the previous embodiments and will not be repeated here.

[0051] The above is a detailed introduction to an LED display structure and display screen provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and embodiments of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of the present invention, there may be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An LED display structure, characterized in that: include: PCB board; A plurality of light-emitting pixels are provided on the PCB board and arranged in an array in row and column directions, each of the light-emitting pixels comprising a plurality of LED lamp beads; Wherein, if the common ends of the LED lamp beads of the same luminous color in the luminous pixels of each row are electrically connected to form a scan line, the non-common ends of the LED lamp beads in the luminous pixels of each column are electrically connected to form at least one data line; If the common ends of the LED lamp beads of the same luminous color in each column of the luminous pixels are electrically connected to form a scan line, then the non-common ends of the LED lamp beads in each row of the luminous pixels are electrically connected to form at least one data line; The PCB board is provided with two anode substrate pads and one cathode substrate pad, and the LED lamp bead includes a first light-emitting body, a second light-emitting body, a substrate, a first P-type pad, a second P-type pad and an N-type pad; The N-type pad is the common cathode end of the LED lamp bead, the first light-emitting body is electrically connected to an anode substrate pad through the first P-type pad, the second light-emitting body is electrically connected to another anode substrate pad through the second P-type pad, the first P-type pad and the second P-type pad are both electrically connected to the anode substrate pad through metal tin, and the N-type pad is electrically connected to the cathode substrate pad through metal tin.

2. The LED display structure according to claim 1, characterized in that: One of the scan lines is electrically connected to a strobe signal pin of the strobe chip separately.

3. The LED display structure according to claim 1, characterized in that: One of the data lines is electrically connected to a data signal pin of the driving chip alone.

4. The LED display structure according to claim 1, characterized in that: The common terminal of the LED lamp bead is a common cathode terminal or a common anode terminal.

5. The LED display structure according to claim 1, characterized in that: The PCB board includes multiple layers of wiring, and the scan lines and the data lines are located in different layers in the PCB board.

6. The LED display structure according to claim 1, characterized in that: The light-emitting pixels are all the same.

7. The LED display structure according to claim 1, characterized in that: Each of the light-emitting pixels includes a red LED lamp bead, a green LED lamp bead and a blue LED lamp bead.

8. The LED display structure according to claim 1, characterized in that: The LED lamp beads in the light-emitting pixels are arranged vertically.

9. An LED display screen, characterized in that: The LED display structure comprises the LED display structure according to any one of claims 1 to 8.

Images