LED display method

Abstract

The embodiment of the present invention discloses an LED display method, which is applied to an LED display screen, wherein the LED display screen includes a plurality of light-emitting pixels arranged in an array, wherein the light-emitting pixels include a plurality of LED lamp beads, wherein the common poles of the LED lamp beads of the same light-emitting color in each row of light-emitting pixel units are electrically connected to form a scan line, and connected to a gating chip; the non-common poles of the LED lamp beads in each column of light-emitting pixels are electrically connected to form at least one data line, and connected to a driving chip; the LED display method includes: the gating chip selects the scan lines row by row, and the driving chip lights up each LED lamp bead column by column through the data line, so as to display different light-emitting colors and light-emitting brightness in the LED display screen. The LED display method provided by the embodiment of the present invention does not need to increase the frequency to achieve high-quality LED display, avoids a large amount of time redundancy, and can also reduce the manufacturing cost of LED display.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display, and in particular to an LED display method. Background Art

[0002] Since the beginning of the 20th century, display technology has been applied to various aspects such as entertainment, industry, military, transportation, education, aerospace, satellite remote sensing and medical care as a window for human-computer connection and information display. The display industry has become a major pillar industry of the electronic information industry.

[0003] At present, in the field of LED display, three colors of RGB light-emitting diodes are usually combined into one pixel, and the negative electrode of each pixel is connected together to form a common cathode design, and the cathode of the entire row is electrically connected to form a selection line (also known as a scanning line), and scans line by line and point by point, and relies on increasing the frequency to achieve high image quality and high refresh rate. However, although the above method improves the image quality of LED display, it generates a lot of time redundancy for LED display, increases production costs, and causes serious waste of resources. Summary of the invention

[0004] In view of the deficiencies of the prior art, an embodiment of the present invention provides an LED display method, which does not require increasing the frequency to achieve high-quality LED display, thereby avoiding a large amount of time redundancy and greatly reducing the manufacturing cost of the LED display.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides an LED display method, which is applied to an LED display screen, wherein the LED display screen includes a plurality of light-emitting pixels arranged in an array, wherein the light-emitting pixels include a plurality of LED lamp beads, wherein the common ends of the LED lamp beads of the same light-emitting color in each row of the light-emitting pixel units are electrically connected to form a scan line, and connected to a gating chip; and the non-common ends of the LED lamp beads in each column of the light-emitting pixels are electrically connected to form at least one data line, and connected to a driving chip;

[0006] The LED display method comprises:

[0007] The strobe chip selects the scan lines row by row, and the drive chip lights up the LED lamp beads column by column through the data lines, so as to display different luminous colors and luminous brightness on the LED display screen.

[0008] Preferably, in the LED display method, the non-common ends of the LED lamp beads of the same luminous color in each column of the luminous pixel units are electrically connected to form one data line.

[0009] Preferably, in the LED display method, the non-common ends of the LED lamp beads in each column of the light-emitting pixels are electrically connected to form one data line.

[0010] Preferably, in the LED display method, at least one strobe signal pin is provided on the strobe chip.

[0011] Preferably, in the LED display method, at least one data signal pin is provided on the driving chip.

[0012] Preferably, in the LED display method, each of the light-emitting pixels includes a red LED lamp bead, a green LED lamp bead and a blue LED lamp bead.

[0013] More preferably, in the LED display method, the common terminals between the red LED lamp beads in each row of the light-emitting pixel units are electrically connected to form one of the scan lines.

[0014] More preferably, in the LED display method, the common terminals between the green LED lamp beads in each row of the light-emitting pixel units are electrically connected to form one scan line.

[0015] More preferably, in the LED display method, the common terminals between the blue LED lamp beads in each row of the light-emitting pixel units are electrically connected to form one scan line.

[0016] Preferably, in the LED display method, the LED lamp beads are crystal-bonded on a PCB board.

[0017] Compared with the prior art, an embodiment of the present invention provides an LED display method, which is applied to an LED display screen, wherein the LED display screen includes a plurality of light-emitting pixels arranged in an array, the light-emitting pixels include a plurality of LED lamp beads, the common poles of the LED lamp beads of the same light-emitting color in each row of light-emitting pixel units are electrically connected to form a scan line, and connected to a gating chip; the non-common poles of the LED lamp beads in each column of light-emitting pixels are electrically connected to form at least one data line, and connected to a driving chip; when the LED display screen drives the LED display, the scanning lines are selected row by row through the gating chip, and the driving chip lights up each LED lamp bead column by column through the data line, so as to display different light-emitting colors and light-emitting brightness in the LED display screen, without increasing the frequency to achieve high image quality of the LED display, and avoiding time redundancy. At the same time, if the non-common poles of the LED lamp beads in each column of light-emitting pixels are electrically connected to form a data line, the number of driving chips can be greatly reduced, thereby reducing the manufacturing cost of the LED display. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of the light-emitting pixels arranged in the LED display method provided by an embodiment of the present invention;

[0020] Figure 2 Another structural schematic diagram of the arrangement of light-emitting pixels in the LED display method provided in an embodiment of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the arrangement of light-emitting pixels in the LED display method in the prior art;

[0022] Figure 4 A schematic diagram of the structure of an LED lamp bead in an LED display method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the invention, it is necessary to understand that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "row", "column" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0025] In the present invention, the term "some embodiments" is used to mean "used as an example, illustration or description". Any embodiment described as exemplary in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any technician in the field 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 examples, known structures and processes will not be 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.

[0026] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of the light-emitting pixels arranged in the LED display method provided by an embodiment of the present invention; Figure 2 Another structural schematic diagram of the arrangement of light-emitting pixels in the LED display method 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 method, which is applied to an LED display screen, wherein the LED display screen includes a plurality of light-emitting pixels 20 arranged in an array on a PCB board 10, wherein the light-emitting pixels 20 include a plurality of LED lamp beads, wherein the common poles 201 of the LED lamp beads of the same light-emitting color in each row of the light-emitting pixels 20 units are electrically connected to form a scan line 30, and are connected to a gating chip; and the non-common poles 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, and are connected to a driving chip.

[0027] in, Figure 1 and Figure 2 The LED display method implemented by the LED display structure includes:

[0028] The strobe chip selects the scan lines 30 row by row, and the driver chip lights up the LED lamp beads column by column through the data lines 40 to display different luminous colors and luminous brightness on the LED display screen.

[0029] In the LED display method provided by the embodiment of the present invention, 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 scan line 30, and connected to a gating chip. At this time, the scan lines 30 in each row of the luminous pixels 20 are increased to several times; the non-common poles 202 of the LED lamp beads in each column of the luminous pixels 20 are electrically connected to form at least one data line 40, and connected to a driving chip. Then, when the LED display screen is scanned and driven, it is only necessary to select the scan lines 30 row by row through the gating chip, and at the same time, the driving chip lights up each LED lamp bead column by column through the data line 40, so as to display different luminous colors and luminous brightness in the LED display screen, without increasing the frequency to achieve high image quality of the LED display, thereby avoiding a large amount of time redundancy and greatly reducing the manufacturing cost of the LED display.

[0030] It can be understood 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 scan 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.

[0031] It is also understandable that Figure 1 and Figure 2 After the scanning lines 30 and the data lines 40 are interchanged in rows and columns, the LED display method also needs to interchange in rows and columns.

[0032] For example, if the common poles 201 of LED lamp beads of the same luminous color in each column of light-emitting pixels 20 are electrically connected to form a scan line 30 and connected to a selection chip; the non-common poles 202 of the LED lamp beads in each row of the light-emitting pixels 20 are electrically connected to form at least one data line 40 and connected to a driving chip, then the LED display method includes: the selection chip selects the scan lines 30 column by column, and the driving chip lights up each LED lamp bead row by row through the data line 40, so as to display different luminous colors and luminous brightness in the LED display screen.

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

[0034] See also Figure 3 , Figure 3 It is a schematic diagram of the structure of the arrangement of light-emitting pixels in the LED display method 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 screen clearer.

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

[0036] In addition, one or more illuminants may be provided in the LED lamp bead. If multiple illuminants are provided in the LED lamp bead, two non-common poles 202 may be provided in the LED lamp bead, and the two illuminants may 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.

[0037] The following is a detailed description of a specific structure diagram with a common terminal 201 and two non-common terminal 202 on the PCB board 10 .

[0038] 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 luminous body, a second luminous body, a substrate 2011, a first P-type pad 20121, a second P-type pad 20122 and an N-type pad 2013, wherein the N-type pad 2013 is the common cathode terminal of the LED lamp bead, the first luminous body is electrically connected to an anode substrate pad 112 through the first P-type pad 20121, and the second luminous body is electrically connected to an anode substrate pad 112 through 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, 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 protection layer 202 0 and an active light emitting layer 2021, a P-type Bragg reflection layer through hole and an N-type Bragg reflection layer through hole are provided on the Bragg reflection layer 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 reflection layer through hole, an N-type pad 2013 is electrically connected to the connection metal through the N-type Bragg reflection layer through hole, and the Bragg reflection layer 2016 is formed by stacking 28 layers of SiO2 and Ti3O5 materials; a length of the P-type semiconductor 2018 is 80 microns and a width of 50 microns, a length of the N-type semiconductor 2019 is 100 microns and a width of 55 micrometers; a P-type insulating protection layer through hole and an N-type insulating protection layer through hole are provided on the insulating protection layer 2020, the P-type conductive metal layer 2014 is electrically connected to the current spreading layer 2017 through the P-type insulating protection 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 protection 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.

[0039] 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 adding 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.

[0040] It can also be understood that the LED display scanning method 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 package LED chips into surface mount devices first, and then fix these devices to the PCB board through a mounter. 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 and package two, four, six or more groups of lamp beads in 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 mounter.

[0041] In some embodiments, a scan line 30 is electrically connected to a selection signal pin of a selection chip alone; a data line 40 is electrically connected to a data signal pin of a driving chip alone. Specifically, at least one selection signal pin is provided on the selection chip, 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; at least one data signal pin is provided on the driving chip, that is, a driving 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 driving chip can be integrated into one chip, and the selection chip and the driving chip can also be used as a separate chip for scanning and driving. The chip model can be TLC6984 or MBI515.

[0042] In addition, when the LED display scanning method provided by the embodiment of the present invention is adopted, each light-emitting pixel 20 is the same, that is, the LED lamp beads at the corresponding position in each light-emitting pixel 20 are the same, and the LED lamp beads in the light-emitting pixel 20 are arranged vertically. At this time, it is only necessary to use the selection chip to select the scanning line 30 row by row, and use the driving chip to light up each LED lamp bead column by column through the data line 40, so that different light-emitting colors and light-emitting brightness can be displayed in the LED display screen, thereby forming a complete image in 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 the actual application, and is not specifically limited in the embodiment 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 pixels 20 units is connected in different ways to form at least one data line 40, and each data line 40 is electrically connected to a data signal pin of the driving 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 in the PCB board 10. Specifically, when routing the PCB board 10 in the LED display structure of the present invention, a single routing can be performed in one layer of the PCB board 10 to form the scan line 30, and a single routing can also be performed in another layer of the PCB board 10 to form the data line 40. The scan line 30 can be located in the upper layer of the data line 40 or in the lower layer of the data line 40; similarly, routing can also be performed in a certain layer of the PCB board 10 to form the scan line 30 and the data line 40 at the same time. When the scan line 30 and the data line 40 are in the same layer in the PCB board 10, they can be connected by a bridge at the intersection of the scan line 30 and the data line 40; 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, Figure 1 As shown, the non-common poles 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 poles 202 between 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 driving chip to provide a constant current source for each LED lamp bead in each column of light-emitting pixels 20, thereby reducing the number of driving chips in the LED display screen, thereby 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 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 scanning 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 conventional LED display scanning method, the cathodes of the red LED lamp bead 210, the green LED lamp bead 220 and the blue LED lamp bead 230 of each row of pixels 20 are electrically connected to form a scanning line 30, the anodes of the red LED lamp bead 210 of each column of pixels 20 are electrically connected to form a data line 40, the anodes of the green LED lamp bead 220 of each column of pixels 20 are electrically connected to form a data line 40, and the anodes of the blue LED lamp bead 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, and the scanning line 30 is 16×3=48. The number of trace lines 30 is 9, and a total of 57 signals are required; while in the LED display scanning method of the present application, 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, 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, and 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. At this time, the number of data lines 40 required is 16, and the number of scan lines 30 is 9×3=27, and a total of 43 signals are required. It can be seen from this that the number of signals required on the PCB board 10 as a whole in the LED display scanning method provided by the embodiment of the present invention is greatly reduced, and the reduction ratio reaches 24.56%.

[0049] 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 refer to the previous embodiments and will not be repeated here.

[0050] The above is a detailed introduction to an LED display method provided by an embodiment of the present invention. Specific examples are used in this article 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 technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An LED display method, applied to an LED display screen, characterized in that: The LED display screen includes a plurality of light-emitting pixels arranged in an array, and the light-emitting pixels include a plurality of LED lamp beads. The common ends 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, and connected to a gating chip; the non-common ends of the LED lamp beads in each column of the light-emitting pixels are electrically connected to form at least one data line, and connected to a driving chip; The LED display method comprises: The strobe chip selects the scan lines row by row, and the driver chip lights up the LED lamp beads column by column through the data lines, so as to display different luminous colors and luminous brightness on the LED display screen; Among them, the LED lamp bead is provided with at least two light-emitting bodies, and the light-emitting bodies include a P-type conductive metal layer, an N-type conductive metal layer, a Bragg reflection layer, a current spreading layer, a P-type semiconductor, an N-type semiconductor, an insulating protection layer and an active light-emitting layer. The P-type pad corresponding to the non-common end of the LED lamp bead is electrically connected to the P-type conductive metal layer through the P-type Bragg reflection layer through-hole, and the N-type pad corresponding to the common end of the LED lamp bead is electrically connected to the connecting metal through the N-type Bragg reflection layer through-hole.

2. The LED display method according to claim 1, characterized in that: The non-common ends of the LED lamp beads with the same luminous color in each column of the luminous pixel units are electrically connected to form one data line.

3. The LED display method according to claim 1, characterized in that: The non-common ends of the LED lamp beads in each column of the light-emitting pixels are electrically connected to form one data line.

4. The LED display method according to claim 1, characterized in that: The gating chip is provided with at least one gating signal pin.

5. The LED display method according to claim 1, characterized in that: The driving chip is provided with at least one data signal pin.

6. The LED display method 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.

7. The LED display method according to claim 6, characterized in that: The common terminals between the red LED lamp beads in each row of the light-emitting pixel units are electrically connected to form one of the scan lines.

8. The LED display method according to claim 6, characterized in that: The common terminals between the green LED lamp beads in each row of the light-emitting pixel units are electrically connected to form one of the scan lines.

9. The LED display method according to claim 6, characterized in that: The common terminals between the blue LED lamp beads in each row of the light-emitting pixel units are electrically connected to form one of the scan lines.

10. The LED display method according to claim 1, characterized in that: The LED lamp beads are crystal-fixed on the PCB board.

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