Full-color transparent display screen with line scanning chip placed on left side

Abstract

The utility model provides a full-color transparent display screen with row scanning chips placed on the left side, which is characterized in that a row of micro scanning chips and a common grounding end are arranged on the left side of a first printed circuit wiring layer, each row of lamp beads corresponds to one micro scanning chip, a scanning signal line is arranged corresponding to each row of lamp beads, and the common grounding end is connected with the first printed circuit wiring layer. The second printed circuit wiring layer is provided with a common electrode end and a control signal input end, the positive electrode pins corresponding to the lamp beads in each row are provided with corresponding data signal lines, and the negative electrode pins of the lamp beads in each row are connected to the corresponding scanning signal lines in series, and the grounding pins of the micro scanning chips are connected to the common grounding end in series. The data signal lines are provided with wire passing hole positions used for being electrically connected with the positive electrode pins of the corresponding lamp beads, and the positive electrode pins of each column of lamp beads are connected to the corresponding data signal lines in series. The lamp beads are driven in a scanning mode, the wiring density can be reduced, and the light transmittance of the transparent display screen is improved.

Description

Technical Field

[0001] This utility model relates to the field of transparent display technology, and in particular to a full-color transparent display with a row scanning chip placed on the left side. Background Technology

[0002] Transparent displays are widely used in retail advertising, exhibitions, architecture, automobiles, stage performances, AR / VR, smart homes, and other fields.

[0003] Most existing transparent display screen driving methods adopt the following two types. The first driving method integrates the micro-driver chip and LED beads into a MIP package structure, and then connects to an external driver controller through wiring. Its drawback is that the cost is high and the high wiring density leads to poor light transmittance of the transparent display screen. The second driving method uses a semiconductor backplane for driving control. Its drawback is that the active semiconductor backplane needs to be designed and manufactured separately according to the display screen design, which makes it difficult to popularize and to achieve product customization. Moreover, the semiconductor backplane will also reduce the light transmittance of the transparent display screen. Utility Model Content

[0004] To facilitate the driving and control of LED beads, reduce wiring density, and improve the light transmittance of the transparent display screen, this utility model provides a full-color transparent display screen with a line scanning chip placed on the left side, the technical solution of which is as follows:

[0005] A full-color transparent display screen with a row scanning chip placed on the left side includes a transparent substrate, a display layer, a filter layer, an encapsulation layer, and a drive controller for the non-display area. A transparent first printed circuit board (PCB) wiring layer is provided on the front side of the transparent substrate, and a transparent second PCB wiring layer is provided on the back side of the transparent substrate. Several rows and columns of LEDs are evenly arranged on the first PCB wiring layer. A column of miniature scanning chips corresponding to the number of rows of LEDs is provided at the left edge of the first PCB wiring layer. A common ground terminal is provided on the left side of the miniature scanning chips. Each row of LEDs corresponds to one miniature scanning chip. A strip is provided on the first PCB wiring layer corresponding to each row of LEDs and the corresponding miniature scanning chip. The scanning signal line is electrically connected to the signal output pin of the scanning chip. The negative pin of each row of LED beads is connected in series with the corresponding scanning signal line. The ground pin of the micro scanning chip is connected in series with the common ground terminal. On the second printed circuit wiring layer, a common terminal connected in series with the power supply pin of the micro scanning chip and a control signal input terminal connected in series with the signal input pin of the micro scanning chip are provided on the side near the micro scanning chip. On the second printed circuit wiring layer, a corresponding data signal line is provided for the positive pin of each column of LED beads. The data signal line is provided with a through hole for electrically connecting the corresponding positive pin of the LED bead. The positive pin of each column of LED beads is connected in series with the corresponding data signal line.

[0006] Preferably, the scanning signal frequency output from the control signal input terminal to the micro-scanning chip is N×60Hz, wherein the refresh frequency of the micro-scanning chip is 60Hz, and N is the number of rows of the LED beads or the number of micro-scanning chips.

[0007] Preferably, the size of the micro-scanning chip is no more than 150μm, the area is no more than 150μm×150μm, and the diameter of the flip-chip pad corresponding to the pin of the micro-scanning chip is no less than 50μm and no more than 80μm.

[0008] Preferably, the lamp beads are common cathode full-color Mini-LED lamp beads, each lamp bead has three positive pins R, G and B, and the data signal lines corresponding to each column of lamp beads have three lines R, G and B, and the positive pins of the same type of lamp beads in each column are connected in series on the corresponding type of data signal lines.

[0009] Preferably, the pixel pitch of the transparent display screen is in the range of 1mm to 1.5mm, and the wiring width is in the range of 60um to 80um.

[0010] Preferably, the diameter of the wire hole does not exceed 1.5 times the wire width.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention relates to a full-color transparent display screen with a row scanning chip placed on the left side. It features a miniature scanning chip and, compared to existing transparent display screen driving methods, eliminates the need for a semiconductor backplane for driving control. By scanning line by line, it drives and controls the on / off state and duration of each row of LEDs. Each row of LEDs only requires one corresponding scanning signal line, simplifying the wiring design and significantly reducing the wiring density on the transparent substrate, thereby effectively improving the light transmittance of the transparent display screen. Attached Figure Description

[0013] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0014] Figure 1 This is a wiring diagram of the first printed circuit wiring layer on the front side of a transparent substrate;

[0015] Figure 2 This is a wiring diagram of the second printed circuit wiring layer on the back of the transparent substrate;

[0016] In the diagram: 1 is the first printed circuit wiring layer; 2 is the second printed circuit wiring layer; 3 is the micro scanning chip; 4 is the LED bead; 5 is the via hole; 6 is the scanning signal line; 7 is the data signal line; 8 is the common ground terminal; 9 is the common terminal; 10 is the control signal input terminal. Detailed Implementation

[0017] The technical features of this utility model will be further described in detail below with reference to the accompanying drawings so that those skilled in the art can understand them.

[0018] A line scanning chip is placed on the left side of a full-color transparent display screen, and its wiring structure is as follows: Figure 1 and Figure 2 As shown, the device includes a transparent substrate, a display layer, a filter layer, an encapsulation layer, and a drive controller for a non-display area. A transparent first printed circuit board (PCB) wiring layer 1 is provided on the front side of the transparent substrate, and a transparent second PCB wiring layer 2 is provided on the back side of the transparent substrate. Several rows and columns of LED beads 4 are evenly arranged on the first PCB wiring layer 1. A column of miniature scanning chips 3, corresponding to the number of rows of LED beads 4, is provided at the left edge of the first PCB wiring layer 1. A common ground terminal 8 is provided on the left side of the miniature scanning chips 3. Each row of LED beads 4 corresponds to one miniature scanning chip 3. A signal output pin of the corresponding miniature scanning chip 3 is provided on the first PCB wiring layer 1 corresponding to each row of LED beads 4. The scanning signal line 6 is connected in series with the negative pin of each row of LED beads 4. The ground pin of the micro scanning chip 3 is connected in series with the common ground terminal 8. On the second printed circuit wiring layer 2, a common terminal 9 connected in series with the power supply pin of the micro scanning chip 3 and a control signal input terminal 10 connected in series with the signal input pin of the micro scanning chip 3 are provided on the side near the micro scanning chip 3. On the second printed circuit wiring layer 2, a corresponding data signal line 7 is provided for each column of LED beads 4 with a corresponding positive pin. A wire hole 5 for electrically connecting the corresponding positive pin of the LED bead 4 is provided on the data signal line 7. The positive pin of each column of LED beads 4 is connected in series with the corresponding data signal line 7.

[0019] Compared to existing transparent display driving methods, this transparent display does not require a semiconductor backplane for driving control. It drives and controls the on / off state and lighting duration of each row of LEDs through line-by-line scanning. Each row of LEDs only needs to be arranged with one corresponding scanning signal line 6, which simplifies the wiring design and can greatly reduce the wiring density on the transparent substrate, thereby effectively improving the light transmittance of the transparent display.

[0020] Specifically, the driving principle of this transparent display screen is as follows:

[0021] The non-display area drive controller outputs N-segment scanning signals with a frequency of N×60Hz sequentially to the micro-scanning chip 3 corresponding to each row of LED beads 4 through the control signal input terminal 10. At the same time, it outputs the display signal to the positive pin of each column of LED beads 4 through the data signal line 7.

[0022] The scanning signal controls the high-frequency switching of the micro-scanning chip 3, sequentially scanning each row of LED beads 4. When a high-level scanning signal is input, the output pin is at a low level, the scanning signal line 6 is connected to the common ground terminal 8, and the negative pin of the corresponding row of LED beads 4 is connected to the common ground terminal 8. At this time, when some of the data signal lines 7 are at a high level, some of the LED beads 4 in that row are lit and display the corresponding color. Similarly, the micro-scanning chip 3 scans row by row, lighting up each row of LED beads 4, thereby utilizing the inertia and persistence characteristics of the vision system to display the image.

[0023] Specifically, the scanning signal frequency output from the control signal input terminal 10 to the micro-scanning chip 3 is N×60Hz, where the refresh rate of the micro-scanning chip 3 is 60Hz, and N is the number of rows of LED beads 4 or the number of micro-scanning chips 3. Since the more rows of LED beads 4 there are, the higher the scanning signal frequency output from the control signal input terminal 10 to the micro-scanning chip 3, the more rows of LED beads 4 there are, the shorter the single-row scanning time and the shorter the illumination time of a single LED bead. Therefore, the more rows of LED beads 4 there are, the higher the on / off frequency of the micro-scanning chip 3 and the LED beads 4 need to be; that is, the larger the display screen, the higher the quality requirements for the hardware. Simultaneously, since the scanning refresh rate of the micro-scanning chip 3 is 60Hz, the single-row scanning time is... Seconds, all LED beads have the same single-light refresh duration, and the LED beads need to... The LEDs refresh and light up 60 times within a single-line scan time of one second, resulting in a refresh rate of N×60×60Hz. The on / off control frequency of the micro-scanning chip 3 is also N×60×60Hz, making the refresh rate of the transparent display screen 60Hz. It refreshes every second, so the inertia and persistence of the visual system can be used to achieve a clear display of the image.

[0024] Furthermore, the size of the micro-scanning chip 3 does not exceed 150μm, and its area does not exceed 150μm×150μm. The LED bead 4 is a full-color Mini-LED bead, and the size range of Mini-LED bead is typically 50μm~200μm. The size of the micro-scanning chip 3 is comparable to that of the LED bead 4. Therefore, the micro-scanning chip 3 will not reduce the light transmittance of the transparent display screen, ensuring that the light transmittance of the left edge of the transparent display screen is consistent with the overall light transmittance of the transparent display screen, thus avoiding affecting the aesthetic effect of the transparent display screen. The diameter of the flip-chip pad corresponding to the pin of the micro-scanning chip 3 is not less than 50μm and not more than 80μm, so that the micro-scanning chip 3 can be firmly soldered without affecting the ribbon cable.

[0025] Specifically, the LED bead 4 uses a common cathode full-color Mini-LED bead. Compared to traditional LED beads, Mini-LED beads are smaller in size. Since smaller LED beads have less impact on light transmittance, they can be arranged at higher densities, resulting in better brightness and color saturation of the display screen. Therefore, Mini-LED beads are more suitable for use in transparent displays. Each LED bead 4 has three positive pins: R, G, and B. The data signal lines 7 of each column of LED beads 4 also have three pins: R, G, and B. The positive pins of the same type in each column of LED beads 4 are connected in series on the corresponding type of data signal line 7. When the R-type data signal line 7 of a certain column is high and the scan signal line 6 of a certain row is on, the LED bead 4 in that row and column lights up red. Similarly, the LED bead 4 can also display green or blue. After the light from several LED beads is modulated by the filter layer, a richly colored picture can be displayed.

[0026] In addition, the pixel pitch of the transparent display screen is 1mm to 1.5mm, which is the spacing between the LED beads 4. The 1mm to 1.5mm pitch range can ensure that the transparent display screen has a high resolution while leaving enough space for printing wiring to reduce wiring density and improve the light transmittance of the transparent display screen; the wiring width is 60um to 80um, which can ensure the stability of electrical connection between electronic components.

[0027] Specifically, the diameter of the through hole 5 does not exceed 1.5 times the wiring width, which can ensure stable electrical connection while avoiding affecting the light transmittance of the transparent display screen.

[0028] The embodiments described herein are merely preferred embodiments of the present invention and are not limited to the precise structures described above and shown in the accompanying drawings. Various modifications and changes can be made without departing from the scope of protection of the present invention. Any variations and improvements made by engineers in the art to the technical solutions of the present invention without departing from the design concept of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A full-color transparent display screen with a row scanning chip placed on the left side, comprising a transparent substrate, a display layer, a filter layer, an encapsulation layer, and a driving controller for the non-display area, characterized in that: A transparent first printed circuit wiring layer (1) is provided on the front side of the transparent substrate, and a transparent second printed circuit wiring layer (2) is provided on the back side of the transparent substrate. Several rows and columns of LED beads (4) are evenly arranged on the first printed circuit wiring layer (1). A column of miniature scanning chips (3) corresponding to the number of rows of LED beads (4) is provided at the left edge of the first printed circuit wiring layer (1). A common ground terminal (8) is provided on the left side of the miniature scanning chip (3). Each row of LED beads (4) corresponds to one miniature scanning chip (3). A scanning signal line (6) electrically connected to the signal output pin of the corresponding miniature scanning chip (3) is provided on the first printed circuit wiring layer (1) corresponding to each row of LED beads (4). The negative terminal of each row of LED beads (4) is... All pins are connected in series on the corresponding scanning signal line (6). The ground pin of the micro scanning chip (3) is connected in series on the common ground terminal (8). On the second printed circuit wiring layer (2), a common terminal (9) connected in series with the power supply pin of the micro scanning chip (3) is provided on the side near the micro scanning chip (3), and a control signal input terminal (10) connected in series with the signal input pin of the micro scanning chip (3) is provided. On the second printed circuit wiring layer (2), a corresponding data signal line (7) is provided for the positive pin of each column of lamp beads (4). A wire hole (5) for electrically connecting the positive pin of the corresponding lamp bead (4) is provided on the data signal line (7). The positive pin of each column of lamp beads (4) is connected in series on the corresponding data signal line (7).

2. The full-color transparent display screen with a row scanning chip placed on the left side according to claim 1, characterized in that: The scanning signal frequency output from the control signal input terminal (10) to the micro scanning chip (3) is N×60Hz, where the refresh frequency of the micro scanning chip (3) is 60Hz, and N is the number of rows of the LED beads (4) or the number of micro scanning chips (3).

3. The full-color transparent display screen with a row scanning chip placed on the left side according to claim 1, characterized in that: The size of the micro-scanning chip (3) is no more than 150μm and the area is no more than 150μm×150μm. The diameter of the flip-chip pad corresponding to the pin of the micro-scanning chip (3) is no less than 50μm and no more than 80μm.

4. The full-color transparent display screen with a row scanning chip placed on the left side according to claim 1, characterized in that: The lamp beads (4) are common cathode full-color Mini-LED lamp beads. Each lamp bead (4) is provided with three positive pins: R, G, and B. The data signal lines (7) of each column of lamp beads (4) are provided with three lines: R, G, and B. The positive pins of the same type of each column of lamp beads (4) are connected in series on the corresponding type of data signal lines (7).

5. A full-color transparent display screen with a row scanning chip placed on the left side according to claim 1, characterized in that: The pixel pitch of this transparent display screen ranges from 1mm to 1.5mm, and the wiring width is from 60um to 80um.

6. The full-color transparent display screen with a row scanning chip placed on the left side according to claim 5, characterized in that: The diameter of the wire hole (5) shall not exceed 1.5 times the width of the wiring.

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