An LED display device based on multi-point aggregate pixels

Abstract

This invention discloses an LED display device based on multi-point pixel aggregation, comprising an LED carrier plate and multiple pixel units disposed on the LED carrier plate. The LED carrier plate includes a front side and a back side, and through holes arranged regularly through the front and back sides of the LED carrier plate. At least three through holes enclose an island-shaped area. Each pixel unit includes multiple sub-pixels and an LED driver chip. The multiple pixel units are horizontally arranged to form a pixel unit row, and the multiple pixel unit rows form the pixel surface of the LED display device. The sub-pixels are disposed in the island-shaped area on the front side of the LED carrier plate. This invention uses multi-point pixel aggregation to aggregate multiple adjacent sub-pixels into a pixel unit, and multiple sub-pixels share a single LED driver chip, thereby achieving the goals of improving the display brightness of the LED display device, making the display brightness distribution more uniform and natural, and saving costs.

Description

Technical Field

[0001] This invention relates to the field of LED display technology, and in particular to an LED display device based on multi-point pixel aggregation. Background Art

[0002] LED display technology is now very mature, but conventional LED display technology can no longer meet people's growing needs.

[0003] For example, patent CN114863868A discloses an LED carrier board and its display device, which can achieve transparent or semi-transparent display effects. However, in this patent, each actual pixel is an LED light emitter, and each LED light emitter is a complete lamp bead, which contains R, G, and B tri-color lamp beads and an LED driver chip. The existing technical problems with this solution are:

[0004] 1. The investment in LED driver chips is too large (each LED emitter contains an LED driver chip), which increases the cost per unit area significantly;

[0005] 2. Uneven and unnatural brightness distribution, i.e., there are weak light zones between adjacent LED light emitters. Summary of the Invention

[0006] To address the shortcomings of the prior art, this invention discloses an LED display device based on multi-point pixel aggregation. This technical solution solves the aforementioned technical problems by using multi-point pixel aggregation.

[0007] Specifically, in this technical solution, a pixel unit is an actual pixel. Each pixel unit comprises multiple sub-pixels and an LED driver chip. Each sub-pixel contains R, G, and B tri-color LED beads and is controlled by the same LED driver chip. The light-emitting effect of each sub-pixel is equivalent to that of an LED emitter in the prior art, but it saves a large number of LED driver chips and solves the problem of uneven and unnatural brightness distribution.

[0008] The specific technical solution of the present invention is as follows:

[0009] An LED display device based on multi-point pixel aggregation includes an LED carrier plate and a plurality of pixel units disposed on the LED carrier plate.

[0010] The LED carrier plate includes a front side and a back side, and through holes that are regularly arranged through the front side and the back side of the LED carrier plate, with at least three through holes forming an island-shaped area.

[0011] In this technical solution, the pixel unit comprises multiple sub-pixels, each sub-pixel comprising an R-color LED, a G-color LED, and a B-color LED, and the pixel unit further comprises an LED driver chip. Multiple pixel units are horizontally arranged to form pixel unit rows, and multiple pixel unit rows form the pixel surface of the LED display device.

[0012] In this technical solution, the sub-pixels are disposed in the island-shaped area on the front side of the LED carrier.

[0013] The adjacent through holes are spaced at equal intervals.

[0014] In a more preferred technical solution, the pixel unit comprises 3 sub-pixels, and the 3 sub-pixels are arranged to form a triangular pixel unit.

[0015] Alternatively, the pixel unit may contain 4 sub-pixels, and the 4 sub-pixels may be arranged to form a quadrilateral pixel unit.

[0016] Furthermore, the island-shaped region is provided with pads, which are used to solder the sub-pixels.

[0017] The pads include a first pad and a second pad. The first pad has four electrode pins, and the second pad has three electrode pins.

[0018] Furthermore, in each of the aforementioned pixel units:

[0019] The LED driver chip is integrated with a sub-pixel, and the LED driver chip is soldered onto the first pad.

[0020] Alternatively, the LED driver chip may be set separately and soldered together with an external sub-pixel onto the first pad.

[0021] Furthermore, the four electrode pins on the first pad are as follows:

[0022] The VDD pin is electrically connected to the positive terminal of the LED driver chip and / or the positive terminal of the sub-pixel.

[0023] The GND pin is electrically connected to the negative terminal of the LED driver chip and / or to the negative terminal of the sub-pixel.

[0024] The DATA pin is electrically connected to the Din terminal of the LED driver chip.

[0025] The first control pin is electrically connected to the data signal output Dout terminal of the LED driver chip and is used to control the light-emitting state of the sub-pixels without LED driver chips in the pixel unit.

[0026] The three electrode pins on the second pad are as follows:

[0027] The VDD pin is used for electrical connection to the positive terminal of the sub-pixel.

[0028] The GND pin is used for electrically connecting the negative terminal of the sub-pixel.

[0029] The second control pin is electrically connected to the first control pin and is used to receive data signals from the LED driver chip.

[0030] In this technical solution, the sub-pixels do not obstruct the through-hole.

[0031] This invention discloses an LED display device based on multi-point pixel aggregation. This technical solution uses a multi-point pixel aggregation method to group multiple adjacent sub-pixels into a single pixel unit. Each sub-pixel contains R, G, and B tri-color LED beads, and multiple sub-pixels share a single LED driver chip. This technical solution has the following three beneficial effects:

[0032] 1. Saves a significant amount of LED driver chips, resulting in substantial cost savings for businesses.

[0033] 2. The brightness distribution of LED display devices is more uniform and natural.

[0034] 3. Increase the display brightness and contrast of LED display devices. Attached Figure Description

[0035] Figure 1 A schematic diagram of an embodiment of a through hole and its island-shaped region on an LED carrier plate in an LED display device based on multi-point pixel aggregation according to the present invention.

[0036] Figure 2 A schematic diagram of another embodiment of the through hole and its island-shaped region on the LED carrier plate in an LED display device based on multi-point pixel aggregation according to the present invention.

[0037] Figure 3 This invention provides a schematic diagram of an embodiment of the arrangement structure of triangular pixel units in an LED display device based on multi-point pixel aggregation.

[0038] Figure 4 A schematic diagram of another embodiment of the arrangement structure of triangular pixel units in an LED display device based on multi-point pixel aggregation according to the present invention.

[0039] Figure 5 This invention provides a schematic diagram of an embodiment of the arrangement structure of quadrilateral pixel units in an LED display device based on multi-point pixel aggregation.

[0040] Figure 6 This invention provides a schematic diagram of an embodiment of an LED display device based on multi-point pixel aggregation, in which an LED carrier plate is combined with triangular pixel units.

[0041] Figure 7 A schematic diagram of another embodiment of the present invention, which combines an LED carrier plate with triangular pixel units in an LED display device based on multi-point pixel aggregation, is shown.

[0042] Figure 8 A schematic diagram of another embodiment of the LED carrier plate combined with quadrilateral pixel units in an LED display device based on multi-point pixel aggregation according to the present invention.

[0043] Figure 9 A schematic diagram of an embodiment of an LED display device based on multi-point pixel aggregation, in which pads are set in an island-shaped area.

[0044] Figure 10 A schematic diagram of another embodiment of the pads disposed in the island-shaped area of ​​an LED display device based on multi-point pixel aggregation according to the present invention.

[0045] Figure 11 A schematic diagram of the overall structure of an embodiment of an LED display device based on multi-point pixel aggregation, in which an LED carrier plate and a quadrilateral pixel unit are combined.

[0046] Figure 12 A schematic diagram of the overall structure of an embodiment of an LED display device based on multi-point pixel aggregation, in which an LED carrier plate and a triangular pixel unit are combined.

[0047] Figure 13 This invention discloses a schematic diagram of the internal circuit structure of a pixel unit with four sub-pixels in an LED display device based on multi-point pixel aggregation. Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings.

[0049] To better illustrate this embodiment, some components in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product; those skilled in the art will understand the omission of certain well-known structures and their descriptions in the drawings. The same or similar reference numerals correspond to the same or similar components.

[0050] Existing LED display technologies can no longer meet people's growing demands, especially for large-screen LED display devices or equipment that aim to maximize display quality while maintaining cost-effectiveness. It is well known that better display quality in LED display devices requires more hardware investment, such as LED driver chips. This not only increases hardware investment but also increases power consumption costs. In this field, improving LED display device performance and reducing power consumption are difficult to reconcile.

[0051] For example, patent CN114863868A discloses an LED carrier board and its display device. In this patent, each LED light-emitting element is a real pixel, and each LED light-emitting element includes R, G, and B three-color LED beads and an LED driver chip. According to this patent, to increase the resolution, the number of pixels must be increased, and each pixel includes R, G, and B three-color LED beads and an LED driver chip, which will drastically increase the cost. Moreover, the LED display device generates a huge amount of heat.

[0052] The aforementioned patent CN114863868A also has the problem of uneven brightness distribution, especially when adjacent light-emitting pixels present different colors and brightness, the uneven or unnatural brightness distribution is more prominent.

[0053] In view of the shortcomings of the prior art, the present invention discloses an LED display device based on multi-point pixel aggregation. This technical solution uses multi-point pixel aggregation to combine multiple adjacent sub-pixels into a pixel unit. Each sub-pixel contains R, G, and B tri-color LED beads, and multiple sub-pixels share a single LED driver chip.

[0054] In this technical solution, the sub-pixels in the same pixel unit have the same color and brightness, and they turn on and off synchronously. This can effectively improve the display brightness and contrast of the LED display device, as well as enhance the brightness of the weak light areas between adjacent LED light emitters, thereby making the display brightness distribution of the LED display device more uniform and natural.

[0055] In terms of technical effect, compared with the existing technology, this technical solution can save 3 / 4 of the LED driver chips for the same area and density, and the display effect is brighter, more uniform and natural, especially when displaying holographic 3D images, which are more three-dimensional and realistic.

[0056] The specific embodiments of this technical solution are as follows:

[0057] This embodiment is an LED display device based on multi-point pixel aggregation, comprising an LED carrier plate and multiple pixel units disposed on the LED carrier plate, specifically as follows: Figure 11 and Figure 12 As shown.

[0058] like Figure 1 and Figure 2 As shown, the LED carrier 1 in this embodiment includes a front side and a back side, and through holes 11 arranged regularly through the front side and the back side of the LED carrier 1, with at least three through holes 11 forming an island-shaped area 12.

[0059] The structure of the LED display device described in this embodiment consists of multiple pixel units 2 arranged in a regular pattern on an LED carrier plate 1. Each pixel unit 2 is a real pixel, specifically as follows: Figure 3 , Figure 4 and Figure 5 As shown.

[0060] Specifically, the pixel unit 2 includes a plurality of sub-pixels 21, such as Figure 3 , Figure 4 and Figure 5 As shown, each sub-pixel 21 includes R-color LEDs, G-color LEDs, and B-color LEDs.

[0061] In this embodiment, the pixel unit 2 further includes an LED driver chip. Multiple pixel units 2 are arranged horizontally to form pixel unit rows, and the multiple pixel unit rows form the pixel surface of the LED display device, such as... Figure 11 and Figure 12 As shown.

[0062] It should be noted in this embodiment that the through holes 11 not only serve the function of light transmission but also provide ventilation and heat dissipation. This invention is a technical solution based on a transparent or semi-transparent LED carrier 1, which can display images and present a transparent visual effect. The regularly arranged through holes 11 serve the function of achieving the transparent visual effect. Since this technical solution uses a large number of LED beads (sub-pixels 21), the heat generation of LED beads is a difficult technical challenge to overcome in the entire industry. These regularly arranged through holes 11 precisely solve the problem of ventilation and heat dissipation.

[0063] In this embodiment, the through hole 11 is preferably a circle of uniform size. In addition to a circle, the through hole 11 can also be other shapes, such as a square, a triangle, or a combination of shapes arranged alternately.

[0064] It should be noted that the specifications of the through holes 11 can be uniform or arranged in an orderly manner with different specifications, such as alternating arrangements of two diameters of circular holes.

[0065] However, in this embodiment, the through hole 11 is preferably a circle of uniform size, with equal spacing between adjacent holes. This not only helps to unify the pixel size and its arrangement, but also facilitates mass production.

[0066] In this embodiment, the pixel unit 2 includes multiple sub-pixels 21. In the best technical effect, the pixel unit 2 includes 3 or 4 sub-pixels 21.

[0067] When pixel unit 2 contains 3 sub-pixels 21, the 3 sub-pixels 21 are arranged to form a triangular pixel unit. In this embodiment... Figure 3 and Figure 6 This is a specific implementation of a triangular pixel unit. Figure 4 and Figure 7 This is another specific implementation of the triangular pixel unit.

[0068] When pixel unit 2 contains 4 sub-pixels 21, the 4 sub-pixels 21 are arranged to form a quadrilateral pixel unit. In this embodiment... Figure 5 and Figure 8 This is a specific implementation of a quadrilateral pixel unit. In this case, multiple pixel units 2 are arranged horizontally in a pixel unit row alignment, as shown below. Figure 11 As shown.

[0069] In this embodiment, the sub-pixel 21 is disposed in the island-shaped region 12 on the front side of the LED carrier plate 1.

[0070] It should be noted that the island-shaped region 12 is a region enclosed by at least three of the aforementioned through holes 11. Alternatively, it can be described as the area on the LED carrier board 1 that is not penetrated, excluding the through holes 11. From the perspective of the LED carrier board 1 as a whole, the remaining carrier board area, excluding all the through holes 11, is equivalent to an archipelago, and this archipelago is composed of n island-shaped regions 12 connected together, specifically as follows... Figure 1 and Figure 2 As shown.

[0071] The through-holes 11 are used for light transmission, presenting a transparent or semi-transparent visual effect. When the LED display device described in this embodiment is not operating, natural light can pass through the plurality of through-holes 11, forming a screen with a certain light transmittance. Under the condition of natural light transmission, the amount of light transmitted is related to the aperture size and density of the through-holes 11. The larger the aperture size and the higher the density of the through-holes 11, the more light is transmitted, and the closer it is to a transparent visual effect. The farther the viewing distance, the better the transparent visual effect.

[0072] In this embodiment, adjacent through holes 11 are arranged at equal intervals. Multiple rows of through holes 11 and island-shaped regions 12 form a complete LED carrier plate 1.

[0073] Specifically, the multiple rows of through holes 11 can be arranged in a staggered manner (e.g. Figure 1 As shown), they can also be aligned (as shown). Figure 2(As shown). When multiple rows of through holes 11 are arranged in a staggered manner, the island-shaped region 12 is formed by three through holes 11 (as shown). Figure 1 (As shown); when multiple rows of through holes 11 are aligned, the island-shaped region 12 is formed by four through holes 11 (as shown). Figure 2 (As shown).

[0074] This implementation example Figure 9 and Figure 10 As shown, a pad 13 is provided at the island-shaped region 12, and the pad 13 is used to solder the sub-pixel 21.

[0075] In a more preferred embodiment, the pad 13 includes a first pad 131 and a second pad 132. The first pad 131 is provided with four electrode pins 130, and the second pad 132 is provided with three electrode pins 130.

[0076] In this embodiment, each pixel unit contains an LED driver chip, therefore:

[0077] When the LED driver chip is integrally disposed with a sub-pixel 21, the LED driver chip (and the LED driver chip integrally disposed with the sub-pixel) is soldered onto the first pad 131.

[0078] When the LED driver chip is set up alone, it needs to be soldered together with an external sub-pixel 21 onto the first pad 131.

[0079] This implementation example Figure 9 and Figure 10 As shown, the four electrode pins 130 on the first pad 131 are as follows:

[0080] The VDD pin is electrically connected to the positive terminal of the LED driver chip and / or the positive terminal of the sub-pixel 21.

[0081] The GND pin is electrically connected to the negative terminal of the LED driver chip and / or the negative terminal of the sub-pixel 21.

[0082] The DATA pin is electrically connected to the Din terminal of the LED driver chip.

[0083] The first control pin is electrically connected to the data signal output Dout terminal of the LED driver chip and is used to control the light emission state of the sub-pixel 21 in the pixel unit 2 that does not have an LED driver chip.

[0084] The three electrode pins 130 on the second pad 132 are as follows:

[0085] The VDD pin is used to electrically connect to the positive terminal of sub-pixel 21.

[0086] The GND pin is used to electrically connect to the negative terminal of sub-pixel 21.

[0087] The second control pin is electrically connected to the first control pin and is used to receive data signals from the LED driver chip.

[0088] It should be particularly noted in this embodiment that the LED carrier board 1 is provided with a wiring structure, which includes VDD lines, GND lines, and DATA lines, wherein:

[0089] The VDD line is electrically connected to the VDD pin;

[0090] The GND line is electrically connected to the GND pin;

[0091] The DATA line is electrically connected to the DATA pin.

[0092] In existing transparent screens, the pixels do not cover the through-hole, and the through-hole is independent of the pixels. When displaying images in a transparent state, the visual effect appears somewhat harsh, and the displayed image is more or less affected by the light passing through the through-hole.

[0093] In this technical solution, the pixel (pixel unit 2) spans or covers the through hole 11. When the LED display device displays an image in a transparent state, the through hole 11 is also part of the pixel. Under such working conditions, the visual effect of the displayed image appears very realistic, vivid and full, especially when displaying holographic 3D images, it is more three-dimensional and realistic.

[0094] The pixel unit 2 includes multiple sub-pixels 21 and an LED driver chip. This embodiment uses a pixel unit 2 containing four sub-pixels 21 as an example to illustrate the connection method between the multiple sub-pixels 21 and the LED driver chip. In the preferred scheme, the four sub-pixels 21 are connected in series. One end of the series connection of the four sub-pixels 21 is connected to the VDD voltage power supply terminal, and the other end is connected to the LED driver chip. Simultaneously, the LED driver chip is connected to both the VDD voltage power supply terminal and the GND terminal. Figure 13 As shown.

[0095] It should be noted in this embodiment that, in addition to being connected in series, the multiple sub-pixels 21 can also be connected in parallel. In this case, one end of the parallel connection of the multiple sub-pixels 21 is connected to the VDD voltage power supply terminal, and the other end is connected to the LED driver chip. At the same time, the LED driver chip is connected to both the VDD voltage power supply terminal and the GND terminal. However, this connection method is not commonly used, so in this embodiment, the multiple sub-pixels 21 are preferably connected in series.

[0096] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An LED display device based on multi-point pixel aggregation, characterized in that, It includes an LED carrier plate and a plurality of pixel units disposed on the LED carrier plate; The LED carrier plate includes a front side and a back side, and through holes that penetrate the front side and the back side of the LED carrier plate and are arranged in a regular manner, with at least three through holes forming an island-shaped area. The pixel unit includes multiple sub-pixels, each sub-pixel includes an R-color LED, a G-color LED and a B-color LED, and the pixel unit also includes an LED driver chip; The plurality of pixel units are arranged horizontally to form a pixel unit row, and the plurality of pixel unit rows form a pixel surface of the LED display device; Each pixel unit is a pixel point, the pixel point covers the through hole, and the through hole is a part of the pixel point; The sub-pixels are disposed in the island-shaped area on the front side of the LED carrier.

2. The LED display device based on multi-point pixel aggregation as described in claim 1, characterized in that, The adjacent through holes are spaced at equal intervals.

3. The LED display device based on multi-point pixel aggregation as described in claim 1, characterized in that, The pixel unit comprises 3 sub-pixels, and the 3 sub-pixels are arranged to form a triangular pixel unit.

4. The LED display device based on multi-point pixel aggregation as described in claim 1, characterized in that, The pixel unit comprises 4 sub-pixels, and the 4 sub-pixels are arranged to form a quadrilateral pixel unit.

5. The LED display device based on multi-point pixel aggregation as described in claim 1, characterized in that, The island-shaped region is provided with pads, which are used to solder the sub-pixels; The pads include a first pad and a second pad. The first pad has four electrode pins, and the second pad has three electrode pins.

6. The LED display device based on multi-point pixel aggregation as described in claim 5, characterized in that, In each of the aforementioned pixel units: The LED driver chip is integrated with a sub-pixel, and the LED driver chip is soldered onto the first pad. Alternatively, the LED driver chip may be set separately and soldered together with an external sub-pixel onto the first pad.

7. The LED display device based on multi-point pixel aggregation as described in claim 5, characterized in that, The four electrode pins on the first pad are as follows: The VDD pin is electrically connected to the positive terminal of the LED driver chip and / or to the positive terminal of the sub-pixel; The GND pin is electrically connected to the negative terminal of the LED driver chip and / or to the negative terminal of the sub-pixel; The DATA pin is electrically connected to the Din terminal of the LED driver chip; The first control pin is electrically connected to the data signal output Dout terminal of the LED driver chip and is used to control the light-emitting state of the sub-pixel without an LED driver chip in the pixel unit. The three electrode pins on the second pad are as follows: The VDD pin is used for electrical connection to the positive terminal of the sub-pixel; The GND pin is used for electrical connection to the negative terminal of the sub-pixel; The second control pin is electrically connected to the first control pin and is used to receive data signals from the LED driver chip.

8. The LED display device based on multi-point pixel aggregation as described in claim 1, characterized in that, The sub-pixels do not obstruct the through-hole.

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