A simplified LED display screen circuit structure
By designing a small-sized driver chip and optimizing signal lines and timing, the problems of low transparency and high cost caused by the large number of driver chip pins were solved, thus achieving simplified wiring and improved reliability of high-density displays.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HAILAIDE DISPLAY TECHNOLOGY CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-07-14
Smart Images
Figure CN224501468U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of LED display technology, and in particular to a simplified LED display circuit structure. Background Technology
[0002] With the development of LED display technology, the pixel density of LED displays is getting higher and higher, the pixel pitch is getting smaller and smaller, and the circuit board circuits are becoming more and more complex. The large driver chip solutions currently used in displays have relatively concentrated and dense pins. It is very difficult to place the driver chip on the back of the circuit board and then arrange the display LED beads on the front of the circuit board, making it increasingly difficult to meet the requirements of high-density new display technologies.
[0003] In recent years, there has been an increasing number of new LED transparent display products with equal pixel pitch on the market. This is because transparent screens are made by evenly drilling holes in the circuit board to allow light to pass through. The gaps between the holes are in a matrix state. On the front and back of the circuit board in the opaque part, LED beads and driver chips must be evenly distributed. This places high demands on the layout and wiring of the circuit board.
[0004] However, most existing driver chips have drawbacks such as an excessive number of pins and a large chip area. When the chip size exceeds the diameter of the light-transmitting aperture, it leads to numerous black dots in the display area. Furthermore, the large number of pins complicates wiring; adding even a single signal line or via is difficult, reducing the LED display's transmittance and increasing the difficulty of circuit board manufacturing, thus hindering product yield improvement. Moreover, the lack of optimized signal timing results in an increased number of physically connected signal lines, reducing the reliability of the LED display and increasing overall cost.
[0005] Therefore, it is necessary to improve the existing LED display circuit structure. Utility Model Content
[0006] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, one objective of the present invention is to provide a simplified LED display circuit structure, which designs and optimizes small-volume chips that can be distributed in the wiring gaps of the display circuit board to improve the transparency of the LED display.
[0007] The above objective is achieved through the following technical solution:
[0008] A simplified LED display circuit structure includes a circuit board and a receiver card. The circuit board is provided with a driver chip and LED beads arranged in a matrix. The driver chip includes a plurality of column driver chips and a plurality of row driver chips. The plurality of column driver chips are connected in series and then connected to the receiver card through connectors and sockets. The plurality of row driver chips are connected in series and then connected to the receiver card through connectors and sockets.
[0009] The tube driver chip includes at least a tube data input DIN, a tube data output DOUT, a tube power supply VCC, a tube ground GND, and a tube first output channel OUT1. The tube data input DIN and tube data output DOUT of two adjacent tube driver chips are connected to each other. The tube first output channel OUT1 is connected to the corresponding LED.
[0010] The horizontal output transistor driver chip includes at least a horizontal output transistor data input DIN, a horizontal output transistor data output DOUT, a horizontal output transistor power supply VCC, a horizontal output transistor ground GND, and a first output channel OUT1. The horizontal output transistor data input DIN and the horizontal output transistor data output DOUT of two adjacent horizontal output transistor driver chips are connected accordingly, and the first output channel OUT1 of the horizontal output transistor is connected to the corresponding LED.
[0011] In some embodiments, the tube driver chip further includes a second tube output channel OUT2 and a third tube output channel OUT3, wherein the second tube output channel OUT2 and the third tube output channel OUT3 are connected to corresponding LED beads.
[0012] In some embodiments, when the number of pins of the tube driver chip is less than or equal to 6, the area of the tube driver chip is less than or equal to 1.6 x 1.6 mm.
[0013] In some embodiments, when the number of pins of the tube driver chip is less than or equal to 8, the area of the tube driver chip is less than or equal to 2x2 millimeters.
[0014] In some embodiments, the horizontal output transistor driver chip further includes a second output channel OUT2, a third output channel OUT3, and a fourth output channel OUT4, wherein the second output channel OUT2, the third output channel OUT3, and the fourth output channel OUT4 are respectively connected to corresponding LED beads.
[0015] In some implementations, when the number of pins of the row transistor driver chip is less than or equal to 6, the area of the row transistor driver chip is less than or equal to 1.6 x 1.6 mm.
[0016] When the number of pins of the row transistor driver chip is less than or equal to 8, the area of the row transistor driver chip is less than or equal to 2x2 millimeters.
[0017] In some embodiments, the column driver chip and the row driver chip may be packaged in DFN, CSP, BGA or QFN packages.
[0018] Compared with the prior art, the present invention has at least the following beneficial effects:
[0019] This invention provides a simplified LED display circuit structure, which designs and optimizes small-sized chips that can be distributed in the wiring gaps of the display circuit board, thereby improving the transparency of the LED display. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the signal distribution of an existing large-diameter transistor driver chip;
[0021] Figure 2 This is a schematic diagram of the signal distribution of an existing large horizontal output transistor driver chip;
[0022] Figure 3 This is a schematic diagram of the pin distribution of the tube driver chip in Example 1;
[0023] Figure 4 This is a schematic diagram of the pin distribution of the horizontal output transistor driver chip in Example 1;
[0024] Figure 5 This is a schematic diagram of the LED display circuit structure in Example 1;
[0025] Figure 6 This is a schematic diagram of the LED display circuit structure in Example 2;
[0026] Figure 7 This is a schematic diagram of the pin distribution of the tube driver chip in Example 2;
[0027] Figure 8 This is a schematic diagram of the LED display circuit structure in Example 3;
[0028] Figure 9 This is a schematic diagram of the pin distribution of the horizontal output transistor driver chip in Example 3.
[0029] In the diagram: 1. Receiver card; 2. Driver chip; 3. LED bead; 4. Tube driver chip; 41. Tube data input DIN; 42. Tube data output DOUT; 43. Tube power supply VCC; 44. Tube ground GND; 45. Tube first output channel OUT1; 46. Tube second output channel OUT2; 47. Tube third output channel OUT3; 5. Horizontal tube driver chip; 51. Horizontal tube data input DIN; 52. Horizontal tube data output DOUT; 53. Horizontal tube power supply VCC; 54. Horizontal tube ground GND; 55. Horizontal tube first output channel OUT1; 56. Horizontal tube second output channel OUT2; 57. Horizontal tube third output channel OUT3; 58. Horizontal tube fourth output channel OUT4. Detailed Implementation
[0030] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.
[0031] like Figure 1 As shown, the signal distribution of the existing LED display large-column tube driver chip includes: clock CLK, latch LAT (LE pin in the figure), output enable signal OE (ROW pin in the figure), data input Din (SDI pin in the figure), output Dout (SDO pin in the figure), power supply VDD, ground GND and column output channels OUT0-15, resulting in the column tube driver chip having at least 23 pins.
[0032] like Figure 2 As shown, the signal distribution of the existing LED display large row output driver chip includes: data input DataIn (DIN pin in the figure), blanking clock RClock (RCK pin in the figure), data clock DataClock (DCK pin in the figure), data output DataOut (DOUT pin in the figure), power supply VDD, ground GND and row output signals OUT0-7, resulting in the row output driver chip having at least 16 pins.
[0033] Therefore, the existing design has a large number of pins, resulting in a large driver chip size. Therefore, to reduce the footprint of the driver chip, the number of pins needs to be reduced.
[0034] like Figure 3-5As shown, Embodiment 1 provides a simplified LED display circuit structure, including a circuit board and a receiver card 1. A driver chip 2 and LED beads 3 arranged in a matrix are disposed on the circuit board. The driver chip 2 includes a plurality of column-tube driver chips 4 and a plurality of row-tube driver chips 5. The plurality of column-tube driver chips 4 are connected in series and then connected to the receiver card 1 through connectors and sockets. The plurality of row-tube driver chips 5 are connected in series and then connected to the receiver card 1 through connectors and sockets.
[0035] The tube driver chip 4 includes at least a tube data input DIN 41, a tube data output DOUT 42, a tube power supply VCC 43, a tube ground GND 44, and a tube first output channel OUT1 45. The tube data input DIN 41 and tube data output DOUT 42 of two adjacent tube driver chips 4 are connected accordingly, and the tube first output channel OUT1 45 is connected to the corresponding LED bead 3. This configuration allows one tube output channel OUT1 to light up one color for one column of each chip.
[0036] The horizontal output transistor (HIP) driver chip 5 includes at least a HIP data input DIN51, a HIP data output DOUT52, a HIP power supply VCC53, a HIP ground GND54, and a first HIP output channel OUT155. The HIP data input DIN51 and HIP data output DOUT52 of two adjacent HIP driver chips 5 are connected accordingly, and the first HIP output channel OUT155 is connected to the corresponding LED bead 3. This configuration allows a single HIP output channel OUT1 to achieve single-row drive current output.
[0037] This invention provides a simplified LED display circuit structure, which designs and optimizes small-sized chips that can be distributed in the wiring gaps of the display circuit board, thereby improving the transparency of the LED display.
[0038] 6 and Figure 7 As shown, Embodiment 2 provides a simplified LED display circuit structure. The tube driver chip 4 further includes a second output channel OUT246 and a third output channel OUT347, which are connected to corresponding LED beads 3. This arrangement allows the three tube output channels OUT1-3 to illuminate one column of three red, green, and blue colors for each chip.
[0039] Furthermore, when the number of pins of the tube driver chip 4 is less than or equal to 6, the area of the tube driver chip 4 is less than or equal to 1.6 x 1.6 mm. This ensures that the tube driver chip 4 is small enough not to affect the light transmission effect of the light-transmitting holes on the circuit board.
[0040] Preferably, when the number of pins of the tube driver chip 4 is less than or equal to 8, the area of the tube driver chip 4 is less than or equal to 2x2 millimeters. This ensures that the tube driver chip 4 does not affect the light transmission effect of the circuit board's light-transmitting holes, and that each chip can illuminate one column of three red, green, and blue colors.
[0041] Furthermore, the horizontal output transistor driver chip 5 also includes a second horizontal output channel OUT256, a third horizontal output channel OUT357, and a fourth horizontal output channel OUT458. The second horizontal output channel OUT256, the third horizontal output channel OUT357, and the fourth horizontal output channel OUT458 are respectively connected to the corresponding LED beads 3. The four horizontal output channels OUT1-4 can realize four-line drive current output.
[0042] Figure 8 and Figure 9 Example 3 is shown, which illustrates the specific structure of the LED display circuit when the column transistor driver chip 4 has three column transistor output channels OUT1-3 and the row transistor driver chip 5 has four row output channels OUT1-4.
[0043] In the above embodiments, the single signal lines of the column transistor driver chip 4 and the row transistor driver chip 5 are further combined into a single signal line for transmission, so that each local unit only needs one signal line to connect to the signal receiving card transmitter. This not only reduces the number of pins of the driver chip 2, shrinks the chip area, simplifies the circuit board wiring, improves the transparency of the LED display, and increases the density of similar pixels, but also reduces the number of signal connections, simplifies circuit board signal wiring, improves reliability, and reduces production and maintenance costs.
[0044] Specifically, when the number of pins of the row transistor driver chip 5 is less than or equal to 6, the area of the row transistor driver chip 5 is less than or equal to 1.6 x 1.6 mm; when the number of pins of the row transistor driver chip 5 is less than or equal to 8, the area of the row transistor driver chip 5 is less than or equal to 2 x 2 mm. This configuration allows for extreme miniaturization of the chip, efficient heat dissipation, and optimized electrical performance.
[0045] Furthermore, the column transistor driver chip 4 and the row transistor driver chip 5 can be packaged in DFN, CSP, BGA, or QFN packages. DFN is a double-sided flat no-lead package; CSP is an advanced microelectronic packaging technology; BGA is a ball grid array package; and QFN is a quad flat no-lead package. These packaging technologies are mainstream chip packaging methods, eliminating the need for manufacturers to seek new packaging methods and reducing production costs. Of course, the packaging forms used in this utility model include, but are not limited to, the above forms.
[0046] The principle of driver chip optimization: Optimization of column transistor driver chips. First, reduce the number of output channels. Reduce the number from the existing 16 to 1 or 3 channels, thus reducing 13-15 pins. Then, modify the timing signals of the column transistor driver chip. The clock CLK, latch LAT, and output enable signal OE commonly used in LED display circuits are merged into the data pin. The chip retains the input Din and output Dout. Each column of chips is cascaded, and a single signal line is used to transmit display data and control signals. The omission of the clock CLK pin is achieved by adding clock logic and circuitry to the chip's data pins to recover the clock from the data timing. The omission of the latch LAT pin is accomplished by counting the number of bits transmitted internally during data transmission. The chip automatically generates the data latch signal, and the number of bits transmitted is passed in from the register parameter stage during data transmission. The output enable signal OE is also passed in during the register parameter stage of data transmission, and the chip automatically generates the input display data. The optimization approach for row transistor driver chips is the same as that for column transistor driver chips: reducing the number of output channels and modifying the timing signals of the row transistor driver chip.
[0047] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.
Claims
1. A simplified LED display circuit structure, characterized in that, The device includes a circuit board and a receiver card (1). The circuit board is provided with a driver chip (2) and LED beads (3) arranged in a matrix. The driver chip (2) includes a plurality of column driver chips (4) and a plurality of row driver chips (5). The plurality of column driver chips (4) are connected in series and then connected to the receiver card (1) through a connector and socket assembly. The plurality of row driver chips (5) are connected in series and then connected to the receiver card (1) through a connector and socket assembly. The tube driver chip (4) includes at least a tube data input DIN (41), a tube data output DOUT (42), a tube power supply VCC (43), a tube ground GND (44), and a tube first output channel OUT1 (45). The tube data input DIN (41) and tube data output DOUT (42) of two adjacent tube driver chips (4) are connected to each other. The tube first output channel OUT1 (45) is connected to the corresponding LED lamp bead (3). The row transistor driver chip (5) includes at least a row transistor data input DIN (51), a row transistor data output DOUT (52), a row transistor power supply VCC (53), a row transistor ground GND (54), and a row transistor first output channel OUT1 (55). The row transistor data input DIN (51) and the row transistor data output DOUT (52) of two adjacent row transistor driver chips (5) are connected to each other. The row transistor first output channel OUT1 (55) is connected to the corresponding LED bead (3).
2. The simplified LED display circuit structure according to claim 1, characterized in that: The tube driver chip (4) also includes a second tube output channel OUT2 (46) and a third tube output channel OUT3 (47), and the second tube output channel OUT2 (46) and the third tube output channel OUT3 (47) are connected to the corresponding LED beads (3).
3. The simplified LED display circuit structure according to claim 1, characterized in that: When the number of pins of the tube driver chip (4) is less than or equal to 6, the area of the tube driver chip (4) is less than or equal to 1.6 x 1.6 mm.
4. A simplified LED display circuit structure according to claim 2, characterized in that: When the number of pins of the tube driver chip (4) is less than or equal to 8, the area of the tube driver chip (4) is less than or equal to 2 x 2 millimeters.
5. A simplified LED display circuit structure according to claim 1, 2, 3 or 4, characterized in that: The row transistor driver chip (5) also includes a second row transistor output channel OUT2 (56), a third row transistor output channel OUT3 (57), and a fourth row transistor output channel OUT4 (58), wherein the second output channel OUT2 (56), the third row transistor output channel OUT3 (57), and the fourth row transistor output channel OUT4 (58) are respectively connected to the corresponding LED beads (3).
6. A simplified LED display circuit structure according to claim 5, characterized in that: When the number of pins of the row transistor driver chip (5) is less than or equal to 6, the area of the row transistor driver chip (5) is less than or equal to 1.6 x 1.6 mm. When the number of pins of the row transistor driver chip (5) is less than or equal to 8, the area of the row transistor driver chip (5) is less than or equal to 2x2 millimeters.
7. A simplified LED display circuit structure according to claim 1 or 2, characterized in that, The column driver chip (4) and the row driver chip (5) can be packaged in DFN, CSP, BGA or QFN packaging.