LED display screen pixel structure and LED display screen glass lamp panel

Abstract

The utility model discloses an LED display screen pixel structure which comprises a plurality of pixel units which are arranged into an M * N matrix. Wherein each pixel unit comprises more than four LED chips, the LED chips are arranged in an m * n matrix, the LED distances between any two adjacent LED chips are the same, and the LED chips arranged on a diagonal line are blue light LED chips. The LED chips in each pixel unit are arranged into the m * n matrix, the distance between every two adjacent LEDs is the same, and compared with the prior art, the distance between the LEDs is reduced, so that the granular sensation between pixels is effectively improved; the LED chip arranged on the diagonal line in each pixel unit is set to be the blue light LED chip, so that the blue light energy density of the blue light LED chips is reduced by half under the same display brightness, the blue light damage of blue light to human eyes is greatly reduced, and the LED chips with smaller sizes can be adopted to maintain low cost. The utility model further discloses an LED display screen glass lamp panel.

Description

Technical Field

[0001] This utility model relates to the field of LED display technology, and in particular to an LED display pixel structure and an LED display glass light plate. Background Technology

[0002] like Figure 1 As shown, existing LED displays 100' typically drive three LEDs (red, green, and blue) directly as a single pixel 110', meaning each pixel 110' has three sub-pixels. The common practice is to group the three sub-pixel LEDs (red, green, and blue) into a small package area, which facilitates the manufacturing of individual pixel devices and reduces costs.

[0003] LED displays have pixels arranged at equal intervals along the X and Y directions. The pixel density is typically described by the pixel pitch. For example, P2.5 means a display with a pixel pitch of 2.5 mm, and P1.2 means a display with a pixel pitch of 1.2 mm. The larger the pixel pitch, the greater the spacing between sub-pixels within adjacent pixels. At close range, the human eye may perceive individual LEDs, a phenomenon known in the industry as "graininess." (See also...) Figure 2 As shown, taking a commonly used LED with a length of 0.2 mm and a width of 0.1 mm as an example, if the display screen 100' is arranged with 3*3 pixels 110', and the pixel pitch is designed to be 2.1 mm, then its X-direction pitch L1 is 2.1 mm, and its Y-direction pitch L2 is 0.7 mm, resulting in severe graininess in the X direction. To solve the graininess when viewed at close range, the current approach is to reduce the pixel pitch, for example, from P2.1 to P1.0. However, when the pixel pitch is reduced, the number of LEDs and the number of ICs driving the LEDs increase exponentially, leading to a several-fold increase in cost, making it difficult to meet the needs of large-scale product applications.

[0004] To reduce costs, the industry is moving towards using smaller LEDs. Larger LEDs are more expensive, so the only option is to minimize their size. Currently, red, green, and blue LEDs with dimensions of 200 micrometers or less are commonly used. However, as blue LEDs shrink, maintaining the same display brightness requires a significant increase in blue light radiation per unit area. Direct viewing of blue LEDs can cause retinal damage because high-energy-density blue light is harmful to the eyes.

[0005] Therefore, it is necessary to provide an improved LED display pixel structure and LED display glass lamp board to improve pixel graininess without increasing the cost of driver ICs, and reduce the harm of blue light to human eyes without changing the display brightness. Utility Model Content

[0006] One objective of this invention is to provide an improved pixel structure for an LED display screen, which improves pixel graininess without increasing the cost of the driver IC, and reduces the harm of blue light to the human eye without increasing the display brightness.

[0007] Another objective of this invention is to provide an improved LED display glass panel that improves pixel density without increasing the cost of the driver IC, and reduces the harm of blue light to the human eye without increasing the display brightness.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows: an LED display pixel structure is provided, which includes multiple pixel units, each pixel unit being arranged in an M*N matrix; wherein each pixel unit includes four or more LED chips, each LED chip being arranged in an m*n matrix, the LED spacing between any two adjacent LED chips is the same, and the LED chips arranged on a diagonal are blue LED chips.

[0009] Preferably, m and n are the same natural numbers greater than or equal to 2, that is, the LED chips arranged horizontally in each pixel unit 110 are the same as the LED chips arranged vertically, so that the LED chips are arranged in a square array.

[0010] Preferably, the LED spacing is the spacing between the same sides of two adjacent LED chips in the lateral direction and the spacing between the same sides of two adjacent LED chips in the longitudinal direction.

[0011] Preferably, the LED spacing between two horizontally or vertically adjacent LED chips within each pixel unit is the same; the LED spacing between two horizontally or vertically adjacent LED chips in each pixel unit is the same as the LED spacing within each pixel unit. That is, the LED spacing of the entire display screen is consistent. This ensures that the LED spacing of the entire display screen remains consistent and can be reduced compared to existing technologies, thereby effectively improving the graininess of existing displays.

[0012] Preferably, each pixel unit includes four LED chips arranged in a 2x2 matrix. Two LED chips on one diagonal are blue LED chips, and the other two on the other diagonal are a red LED chip and a green LED chip, respectively. Because two blue LED chips are used as the blue sub-pixel, the blue light energy density of the blue LED chips is reduced by half at the same display brightness, thus significantly reducing the harmful effects of blue light on the human eye. In other words, this application solves the problem of blue light causing eye damage in the prior art while maintaining low cost by using small-sized LED chips.

[0013] Preferably, the LED spacing between two adjacent LED chips in the horizontal direction and the LED spacing between two adjacent LED chips in the vertical direction are both less than or equal to 1.05 mm, thus making all LED spacing the same and reducing it compared to the prior art, thereby effectively improving the graininess between pixels.

[0014] Preferably, the blue LED chips arranged diagonally are driven in parallel as a blue sub-pixel. Under the same display brightness, the blue light energy density of the blue LED chips is reduced by half, which greatly reduces the blue light damage to the human eye.

[0015] Preferably, the red LED chip positioned on a diagonal line is driven as a red sub-pixel and the green LED chip is driven as a green sub-pixel.

[0016] Preferably, the LED chip is a miniaturized LED chip with a flip-chip structure, which facilitates the direct connection of the positive and negative pads of the LED chip to the pads on the glass circuit board.

[0017] Correspondingly, this utility model also provides an LED display screen glass lamp board, which includes a glass circuit board, multiple driver ICs, and the LED display screen pixel structure as described above; wherein, the glass circuit board has a first single-layer circuit and a second single-layer circuit on its two sides respectively; the LED display screen pixel structure is disposed on the side of the glass circuit board with the first single-layer circuit, and each LED chip of each pixel unit is electrically connected to the first single-layer circuit; each driver IC is disposed on the side of the glass circuit board with the second single-layer circuit and is electrically connected to the second single-layer circuit, and the driver IC is electrically connected to each LED chip of the pixel unit.

[0018] Preferably, the glass circuit board has multiple vias through which the driver IC is electrically connected to each LED chip of the pixel unit.

[0019] Compared with the prior art, the LED display pixel structure of this utility model has several advantages. First, each pixel unit includes four or more LED chips arranged in an m*n matrix, and the LED spacing between any two adjacent LED chips is the same. That is, the LED spacing between two horizontally or vertically adjacent LED chips in each pixel unit is the same, and the LED spacing between two adjacent LED chips in two horizontally or vertically adjacent pixel units is also the same as the aforementioned LED spacing, thus ensuring that all LED spacings in the entire display are consistent, effectively improving the graininess between pixels. Second, this application sets the LED chips arranged on a diagonal line in each pixel unit as blue light LED chips, thereby maintaining the same display brightness and reducing the blue light energy density of the blue light LED chips by half after reducing the size of the blue light LED chips, thus significantly reducing the blue light damage to the human eye. Furthermore, the arrangement of LED chips in each pixel unit 110 in this application allows for the selection of smaller LED chips while improving graininess and reducing blue light damage, thereby maintaining low cost.

[0020] Correspondingly, the LED display glass lamp panel having the LED display pixel structure of this utility model also has the above-mentioned technical effects. Attached Figure Description

[0021] Figure 1 This is a structural diagram of an existing LED display screen.

[0022] Figure 2 yes Figure 1 A schematic diagram of the pixel pitch of an LED display screen.

[0023] Figure 3 This is a schematic diagram of the pixel structure of the LED display screen of this utility model.

[0024] Figure 4 yes Figure 3 A magnified view of a portion of the image.

[0025] Figure 5 yes Figure 3 A schematic diagram illustrating the driving principle of each pixel unit.

[0026] Figure 6 This is a structural schematic diagram of the LED display glass light panel of this utility model. Detailed Implementation

[0027] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements. It should be noted that the directional descriptions involved in the present invention, such as up, down, left, right, front, and back, indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the technical solutions of this application or / and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first," "second," etc., described are only used to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0028] Combination Figure 3-4 As shown, the LED display pixel structure 100 provided by this utility model includes multiple pixel units 110, each pixel unit 110 arranged in an M*N matrix, where M and N are natural numbers greater than 1. The specific quantities of M and N are not specifically limited in this utility model. For example, Figure 3 The image only schematically illustrates a 3x3 matrix arrangement of pixel units 110. Each pixel unit 110 includes four or more LED chips, which are arranged in an m*n matrix. The LED spacing L between any two adjacent LED chips is the same, and the LED chips arranged on one diagonal are blue LED chips 111.

[0029] Continue to combine Figure 3-4 As shown, in one embodiment of this utility model, m and n are preferably the same natural number greater than or equal to 2, so that the LED chips of each pixel unit 110 are arranged in a square array. For example, they can be arranged in a 2*2 or 3*3 array. The specific quantities of m and n are not specifically limited in this utility model. Furthermore, the LED chips arranged on one diagonal are blue LED chips 111, and the LED chips arranged on the other diagonal are red LED chips 112 and green LED chips 113.

[0030] The following is combined Figure 4-5As shown, in one embodiment of this utility model, each pixel unit 110 includes four LED chips arranged in a 2*2 matrix. Two LED chips on one diagonal are blue LED chips 111, and two LED chips on the other diagonal are a red LED chip 112 and a green LED chip 113. The two blue LED chips 111 on one diagonal are driven in parallel as a blue sub-pixel, and the red LED chip 112 on the other diagonal is driven as a red sub-pixel, and the green LED chip 113 is driven as a green sub-pixel. Figure 5 As shown, this application uses two blue LED chips 111 as blue sub-pixels. Therefore, at the same display brightness, the blue light energy density of the blue LED chips 111 is reduced by half, thus significantly reducing the harmful effects of blue light on the human eye. In other words, this application significantly reduces the harmful effects of blue light on the human eye at the same display brightness while maintaining low cost by using small-sized LED chips.

[0031] See Figure 4 As shown, in one specific embodiment, in each pixel unit 110, blue LED chips 111 are disposed in the upper left and lower right corners, red LED chip 112 is disposed in the lower left corner, and green LED chip 113 is disposed in the upper right corner. With this structural arrangement, under the same display brightness, the blue light energy density of the blue LED chip 111 is reduced by half, significantly reducing the harmful effects of blue light on the human eye. Understandably, it is also possible to interchange the positions of the two blue LED chips 111 with the red LED chip 112 and the green LED chip 113, and the positions of the red LED chip 112 and the green LED chip 113 can also be interchanged.

[0032] Continue reading Figure 4 As shown, in this utility model, the LED spacing is the spacing between the same sides of two adjacent LED chips in the horizontal direction (X direction) or the spacing between the same sides of two adjacent LED chips in the vertical direction (Y direction). Figure 4 Taking pixel unit 110 as an example, for two adjacent LED chips in the horizontal (X direction), the distance between the right side of the first LED chip and the right side of the second LED chip, and the distance between the right side of the second LED chip and the right side of the third LED chip, are the LED spacing; or the distance between the left side of the first LED chip and the left side of the second LED chip, and the distance between the left side of the second LED chip and the left side of the third LED chip, are the LED spacing, and so on. Figure 4In the specific embodiment shown, taking the top first row as an example, the distance L between the right side of the first blue LED chip 111 and the right side of the second green LED chip 113, and the distance L between the right side of the second green LED chip 113 and the right side of the third first blue LED chip 111 are both LED spacing L, and the LED spacing L in the horizontal (X direction) direction is similar.

[0033] Continue reading Figure 4 As shown, correspondingly, for two adjacent LED chips in the longitudinal (Y direction), the distance between the upper edge of the first LED chip and the upper edge of the second LED chip, and the distance between the upper edge of the second LED chip and the upper edge of the third LED chip, are the LED spacing; or the distance between the lower edge of the first LED chip and the lower edge of the second LED chip, and the distance between the lower edge of the second LED chip and the lower edge of the third LED chip, are the LED spacing, and so on. Figure 4 In the specific embodiment shown, taking the first column on the left as an example, the distance L between the lower side of the first blue LED chip 111 and the lower side of the second green LED chip 113, and the distance L between the lower side of the second green LED chip 113 and the lower side of the third blue LED chip 111 are both LED spacing L, and the LED spacing L in the longitudinal (Y direction) direction is similar.

[0034] Recombined Figure 3-4 As shown, the arrangement of the blue LED chip 111, red LED chip 112, and green LED chip 113 ensures that the LED spacing L between any two adjacent LED chips in the horizontal (X-direction) or vertical (Y-direction) direction within each pixel unit 110 is the same. Simultaneously, it also ensures that the LED spacing L between any two adjacent LED chips in any two adjacent pixel units 110 in the horizontal (X-direction) or vertical (Y-direction) direction is also the same. Figure 4Taking pixel unit 110 as an example, the LED spacing L between the green LED chip 113 of the first pixel unit 110 and the blue LED chip 111 of the second pixel unit 110 in the horizontal direction (X direction) is the same as the LED spacing L within each pixel unit 110, and the same applies to other horizontal (X direction) positions. Simultaneously, the LED spacing L between the red LED chip 112 of the first pixel unit 110 and the blue LED chip 111 of the second pixel unit 110 in the vertical direction (Y direction) is the same as the LED spacing L within each pixel unit 110, and the same applies to other vertical (Y direction) positions. This ensures that all LED spacing Ls across the entire display screen are consistent. Therefore, the array arrangement of LED chips in each pixel unit 110 in this application, while reducing the LED spacing L between any two adjacent LED chips, also ensures that all LED spacing Ls are consistent, thereby effectively improving the graininess of existing displays.

[0035] Continue reading Figure 3 As shown, in one embodiment of this utility model, the LED spacing L between two adjacent LED chips in the horizontal (X direction) and the LED spacing L between two adjacent LED chips in the vertical (Y direction) are both less than or equal to 1.05 mm. In a specific embodiment, the pixel distance is preferably 1.05 mm. Compared to Figure 2 Compared with the prior art shown, all LED spacing L in this application is reduced and all LED spacing L is consistent, thereby effectively improving the graininess between pixels.

[0036] Combination Figure 3-6 As shown, in one embodiment of this utility model, the LED chip is a flip-chip miniaturized LED chip, which facilitates direct connection of the positive and negative pads of the LED chip to the pads on the glass circuit board 200 (described later). Of course, other types of chips can also be selected as needed.

[0037] See below. Figure 6 As shown, in one embodiment of this utility model, an LED display screen glass light panel 1 is also provided, which includes an LED display screen pixel structure 100, a glass circuit board 200, and multiple driver ICs 300. The LED display screen pixel structure 100 is as described above and will not be repeated here.

[0038] In this embodiment, the glass circuit board 200 has a first single-layer circuit 210 and a second single-layer circuit 220 on its two sides, and a plurality of vias 230 are also provided on the glass circuit board 200. The arrangement of the first single-layer circuit 210, the second single-layer circuit 220, and the vias 230 are all conventional in the art. The LED display pixel structure 100 is disposed on the side of the glass circuit board 200 with the first single-layer circuit 210, so that each LED chip of each pixel unit 110 is disposed on the first single-layer circuit 210, and the positive and negative pads of each LED chip are directly electrically connected to the pads on the first single-layer circuit 210. Each driver IC 300 is disposed on the side of the glass circuit board 200 with the second single-layer circuit 220 and is electrically connected to the second single-layer circuit 220. Each driver IC 300 is electrically connected to the LED chip of a sub-pixel through the vias 230, and the driver IC 300 drives the LED chip to form the blue sub-pixel, red sub-pixel, and green sub-pixel, respectively.

[0039] In summary, the LED display pixel structure 100 of this utility model, firstly, each pixel unit 110 includes four or more LED chips, which are arranged in an m*n matrix. Furthermore, the LED spacing L between any two adjacent LED chips is the same. That is, the LED spacing L between two horizontally (X-direction) or vertically (Y-direction) adjacent LED chips within each pixel unit 110 is the same. Also, the LED spacing L between two adjacent LED chips in two horizontally (X-direction) or vertically (Y-direction) adjacent pixel units 110 is the same as the LED spacing L within each pixel unit 110, thus ensuring that all LED spacing L in the entire display screen is the same. The LED spacing L is consistent and can be reduced compared to the prior art, thus effectively improving the graininess between pixels. Secondly, this application sets the LED chips arranged on a diagonal line in each pixel unit 110 as blue LED chips 111. Thus, after the size of the blue LED chip 111 is reduced, the same display brightness is maintained and the blue light energy density of the blue LED chip 111 is reduced by half, thereby significantly reducing the blue light damage to the human eye. Furthermore, the arrangement of the LED chips in each pixel unit 110 in this application allows for the selection of smaller LED chips while improving the graininess and blue light damage, thus maintaining low cost.

[0040] Correspondingly, the LED display glass lamp plate 1 having the LED display pixel structure 100 of this utility model also has the above-mentioned technical effects.

[0041] The structures of other parts of the display screen involved in this utility model are all conventional structures well known to those skilled in the art, and will not be described in detail here.

[0042] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. An LED display screen pixel structure, characterized in that, The LED display screen pixel structure comprises: a plurality of pixel units arranged in an M*N matrix; each of the pixel units comprises four or more LED chips arranged in an m*n matrix, the LED spacing between any two adjacent LED chips is the same, and the LED chips arranged on a diagonal line are blue light LED chips.

2. The LED display screen pixel structure of claim 1, wherein, m and n are the same natural numbers greater than or equal to 2.

3. The LED display screen pixel structure of claim 1, wherein, The LED spacing is the spacing between the same sides of two adjacent LED chips in the horizontal direction and the spacing between the same sides of two adjacent LED chips in the vertical direction.

4. The LED display screen pixel structure of claim 1, wherein, Each of the pixel units comprises four LED chips arranged in a 2*2 matrix, and the two LED chips arranged on a diagonal line are blue light LED chips, and the two LED chips arranged on the other diagonal line are red light LED chips and green light LED chips respectively.

5. The LED display screen pixel structure of claim 4, wherein, The LED spacing between two adjacent LED chips in the horizontal direction and the LED spacing between two adjacent LED chips in the vertical direction are both less than or equal to 1.05 mm.

6. The LED display screen pixel structure of any of claims 1-4, wherein, The blue light LED chips arranged on a diagonal line are driven in parallel as a blue sub-pixel.

7. The LED display screen pixel structure of claim 4, wherein, The red light LED chips arranged on a diagonal line are driven as a red sub-pixel, and the green light LED chips are driven as a green sub-pixel.

8. The LED display screen pixel structure of any of claims 1-5, wherein, The LED chips are flip-chip micro-LED chips.

9. An LED display screen glass light plate, characterized in that, The LED display screen pixel structure comprises: a glass circuit board provided with a first single-layer circuit and a second single-layer circuit on two sides respectively; The LED display screen pixel structure according to any one of claims 1-8 is arranged on the side of the glass circuit board provided with the first single-layer circuit, and each of the LED chips of each of the pixel units is electrically connected to the first single-layer circuit respectively. A plurality of driving ICs are arranged on the side of the glass circuit board provided with the second single-layer circuit and electrically connected to the second single-layer circuit, and the driving ICs are electrically connected to each of the LED chips of the pixel units respectively.

10. The LED display glass light panel of claim 9, wherein, A plurality of through holes are formed on the glass circuit board, and the driving ICs and each of the LED chips of the pixel units are electrically connected through the through holes.

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