LED PCBs and Displays

Abstract

The present invention provides an LED printed circuit board, which includes a printed circuit board front surface and a printed circuit board rear surface, with a plurality of through holes penetrating the printed circuit board front surface and the printed circuit board rear surface, the plurality of through holes including at least two rows of through holes, with at least every third through hole surrounding one island-shaped printed circuit board region on the printed circuit board front surface, with at least two electrode pins provided in the island-shaped printed circuit board region, the electrode pins being for connecting to an LED light emitter installed on the printed circuit board front surface. The present invention also provides an LED display device including the above LED printed circuit board. The printed circuit board and the LED display device can achieve both light transmission and LED display / illumination effects.

Description

[Technical field]

[0001] The present invention relates to the LED field, specifically to an LED printed circuit board and a display device. [Background technology]

[0002] At present, there are many types of LED printed circuit boards in the prior art, but there is a demand from the market for transparent and translucent lighting or display applications.

[0003] Take display as an example, in order to meet the needs of translucent display, new requirements have been placed on the structure of LED printed circuit boards, so there is an urgent need in this field to develop LED printed circuit board technology and display devices that combine light transmission and visual effects of display. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention solves the technical problems in LED transparent or translucent displays. [Means for solving the problem]

[0005] The present invention provides an LED printed circuit board, which includes a front surface and a rear surface of the printed circuit board, a plurality of through holes penetrating the front surface and the rear surface of the printed circuit board, the plurality of through holes including at least two rows of through holes, at least every third through hole surrounding one island-shaped printed circuit board region on the front surface of the printed circuit board, at least two electrode pins provided in the island-shaped printed circuit board region, the electrode pins for connecting with an LED light emitter installed on the front surface of the printed circuit board.

[0006] Preferably, there is no need to install ICs and / or elements for connecting to the LED light emitters on the rear surface of the printed circuit board.

[0007] The LED emitter is located in the island-shaped printed circuit board area and is configured not to block any of the through-holes.

[0008] Preferably, the through holes in each row on the printed circuit board are arranged such that adjacent through holes in that row are equally spaced apart, and / or the LED light emitters in each row on the printed circuit board are arranged such that adjacent LED light emitters in that row are equally spaced apart.

[0009] Preferably, the printed circuit board does not require the provision of a grid structure in rows or columns.

[0010] Preferably, at least every fourth through hole surrounds one island-shaped printed circuit board region.

[0011] Preferably, the printed circuit board is rectangular or other polygonal, or circular, or of other shape.

[0012] Preferably, when an island-shaped printed circuit board region is surrounded by at least every fourth through hole, a rectangle is formed by lines connecting the geometric centers of the four through holes, and one side of the rectangle is parallel or perpendicular to one side of the printed circuit board.

[0013] Preferably, when an island-shaped printed circuit board region is surrounded by at least every fourth through hole, a rectangle is formed by lines connecting the geometric centers of the four through holes, and at least one side of the rectangle is not parallel to any side of the printed circuit board.

[0014] Preferably, the electrode pin includes a first pin and a second pin, and the first pin and the second pin have the following characteristics.

[0015] (1) The first pin is for electrically connecting to the positive electrode of the LED chip in the LED light emitter.

[0016] The second pin is for electrically connecting with the negative terminal of the LED chip in the LED emitter.

[0017] (2) The first pin is for electrically connecting to a first input pin of a drive IC for an LED chip in an LED light emitter.

[0018] The second pin is for electrically connecting with a second input pin of a drive IC for the LED chip in the LED light emitter.

[0019] Preferably, the electrode pins include a first pin, a second pin and a third pin, and the first pin, the second pin and the third pin have the following characteristics:

[0020] The first pin is for electrically connecting to the power supply positive terminal / VCC of the LED light emitter.

[0021] The second pin is for electrically connecting to the negative power supply / GND terminal of the LED light emitter.

[0022] The third pin is for electrically connecting with the data signal input pin DIN terminal of the LED light emitter.

[0023] Preferably, a data input signal wiring of the LED light emitter is installed on the front surface of the printed circuit board between the through-holes of the first row and the through-holes of the second row along the first direction of the printed circuit board.

[0024] Preferably, the printed circuit board further includes a third row of through holes, and ground wiring for the LED light emitters is installed on the rear surface of the printed circuit board along the first direction on the printed circuit board between the first row of through holes and the second row of through holes, and between the second row of through holes and the third row of through holes, and a first printed circuit board rear surface area between the first row of through holes and the second row of through holes and a second printed circuit board rear surface area between the second row of through holes and the third row of through holes are commonly grounded.

[0025] The present invention further provides an LED display device, the LED display device comprising the above LED printed circuit board. Effect of the Invention

[0026] Beneficial effects

[0027] The above-mentioned printed circuit board of the present invention combines a light transmission effect with an LED display / lighting effect, and realizes an evenly spaced display effect, and further realizes an evenly spaced visual effect as well as the visual effect of improved light transmittance. [Brief description of the drawings]

[0028] In order to more clearly describe the technical solutions of the embodiments of the present invention, the drawings used in the embodiments are briefly described below. The drawings described are only for illustrating some embodiments of the present invention, and are not intended to limit the scope. Those skilled in the art can obtain other related drawings based on these drawings without using inventive abilities. [Figure 1] 1 is a schematic diagram showing the front configuration of an LED printed circuit board according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a schematic diagram showing the back surface of an LED printed circuit board according to an embodiment of the present invention. [Diagram 3] 1 is a schematic diagram showing the front configuration of an LED printed circuit board according to an embodiment of the present invention; [Figure 4] 1 is a schematic diagram showing the front configuration of an LED printed circuit board according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to Figs. 1 to 4 used in the embodiments of the present invention. The described embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. The components in the embodiments of the present invention shown in the drawings here can be arranged and designed in various arrangement methods.

[0030] In one embodiment, the present invention provides an LED printed circuit board.

[0031] The LED printed circuit board includes a front printed circuit board surface and a rear printed circuit board surface, with a plurality of through holes extending through the front printed circuit board surface and the rear printed circuit board surface.

[0032] The plurality of through holes includes at least two rows of through holes, with at least every third through hole surrounding one island-shaped printed circuit board area on the front surface of the printed circuit board.

[0033] At least two electrode pins are provided in the island-shaped printed circuit board region, and the electrode pins are for connecting with an LED light emitter installed on the front surface of the printed circuit board.

[0034] In the above embodiment, the multiple through holes in the island-shaped printed circuit board region play the role of light transmission and ventilation, and the LED light emitter plays the role of display / illumination. In a typical form, for each island-shaped printed circuit board region, a corresponding LED light emitter is installed in the island-shaped printed circuit board region, and all the through holes play the role of light transmission and ventilation. However, the present invention does not exclude the following atypical proposal. The LED light emitter is installed above one or more through holes without contact, and is connected to two electrode pins of the two island-shaped printed circuit board regions across two different island-shaped printed circuit board regions on both sides (or around) of the one through hole or multiple through holes. Therefore, in the above embodiment, the electrode pin is not limited to be connected to the LED light emitter installed in the island-shaped printed circuit board region, but is limited to be connected to the LED light emitter installed on the front side of the printed circuit board.

[0035] When multiple through holes are regularly distributed, the LED light emitter shows visually uniform and excellent display effect, and the regular distribution of the through holes improves the sensation of human eyes, especially contributing to improving the visual effect when viewed from a distance.

[0036] 1-2 show an example in which the through holes are circular holes. The through holes may have other shapes, which may or may not be the same, and more generally, the shape is determined by the requirements of visual effects. A circular shape or other shapes having symmetry are preferred embodiments of the through hole shape, and a circular shape is particularly preferred. Preferably, each circular through hole has a circular shape with the same diameter, but the present invention is not limited to through holes that are circular and have the same shape and size.

[0037] In the embodiment shown in Figures 1 and 2, the island-shaped printed circuit board area of ​​the LED printed circuit board is the non-perforated part of the printed circuit board area other than the through holes. When viewed from the entire LED printed circuit board, the remaining area of ​​the printed circuit board other than all the through holes corresponds to an archipelago, and this archipelago surrounds one island-shaped printed circuit board area on the front side of the printed circuit board by at least every third through hole, and the entire archipelago consists of n island-shaped printed circuit board areas.

[0038] As shown in Figures 1 and 2, when the diameter of the circular through hole is larger than the size of the island-shaped printed circuit board area and the through hole is used for light transmission, the light transmittance of the above-mentioned printed circuit board is relatively high, and when the LED is not working, natural light can transmit through multiple above-mentioned through holes, which is a solution with a certain light transmittance.

[0039] In one embodiment, the LED emitter comprises a surface mount LED.

[0040] In another embodiment, the rear surface of the printed circuit board is not provided with ICs and / or elements for connecting with LED emitters.

[0041] The embodiment shows another feature of the present invention compared with the prior art: if the LED light source itself includes a driving IC (not limited to a current limiting IC, a constant current IC) in addition to the LED chip, the printed circuit board only needs to supply power to the LED light source through the corresponding electrode on the front side of the printed circuit board, and there is no need to install ICs and / or elements for connecting with the LED light source on the back side of the printed circuit board.

[0042] In another embodiment, at least every fourth through hole surrounds an island-shaped printed circuit board area.

[0043] For example, each of Figures 1 and 3 shows an example in which one island-shaped printed circuit board area is surrounded by four through holes, but the present invention is not limited to four through holes because three through holes can surround a relatively closed area.

[0044] In another embodiment, the through holes in each row of the printed circuit board are spaced equally apart from adjacent through holes in the row.

[0045] In another embodiment, the LED emitters in each row on the printed circuit board are spaced equally apart from adjacent LED emitters in the row.

[0046] The above two embodiments can contribute to realizing the visual effect of equal intervals.

[0047] In another embodiment, no grid structure of rows or columns is required on the printed circuit board.

[0048] In this embodiment, compared to a conventional LED printed circuit board or LED transparent display device (such as an LED transparent display screen) having one or more horizontal or vertical grids, the present invention does not require any grid structure in rows or columns. The reason is that the present invention meets the basic requirements for the mechanical performance of the printed circuit board by the islands formed by a plurality of island-like printed circuit board regions, and does not require one or more grid structures in rows or columns. That is, this embodiment has a mechanical reinforcement structure. In addition, since the grid is prone to optical illusion and the grid itself affects the visual effect, this embodiment does not install a grid structure.

[0049] In another embodiment, the printed circuit board is rectangular or other polygonal, or circular, or of other shape.

[0050] Taking Figures 1 and 2 as examples, the printed circuit board is rectangular, which is suitable for the general situation of LED lighting or display. Rectangle includes rectangle and square. However, in order to obtain special decorative effects or special visual effects, such as the shape of a tree, the printed circuit board according to the present invention may be other polygonal shapes other than rectangle, or circular, or other shapes. Printed circuit boards with other non-regular shapes are also available.

[0051] In another embodiment, when an island-shaped printed circuit board area is surrounded by at least every fourth through hole, a rectangle is formed by lines connecting the geometric centers of the four through holes, and one side of the rectangle is parallel or perpendicular to one side of the printed circuit board.

[0052] The printed circuit board shown in Figures 1 and 2 corresponds to this embodiment. According to this design, the line connecting the geometric centers of the through holes is parallel or perpendicular to one side of the printed circuit board, so that it is formed to be more regular. In particular, when the printed circuit board is rectangular, the rectangle formed by the lines connecting the geometric centers of the four through holes has each side parallel to one side of the printed circuit board.

[0053] In another embodiment, when an island-shaped printed circuit board area is surrounded by at least every fourth through hole, a rectangle is formed by lines connecting the geometric centers of the four through holes, and at least one side of the rectangle is not parallel to any side of the printed circuit board.

[0054] This embodiment and the previous embodiment are related to the arrangement of through holes. The arrangement of through holes according to the previous embodiment is typical, and the line connecting the geometric centers of corresponding through holes is parallel or perpendicular to one side of the printed circuit board, whereas the arrangement of through holes according to this embodiment is more flexible.

[0055] In particular, comparing FIG. 3 with FIG. 1, when the size of the printed circuit board is the same and the diameter of the through hole is the same, the arrangement of the through holes shown in FIG. 3 is such that the through holes are arranged at an angle, and the rows of the through holes arranged at an angle are parallel to each other. The light transmittance can be calculated for the two embodiments of FIG. 1 and FIG. 3. In the case of FIG. 3, the light transmittance is further improved, and the number of LED light emitters and the energy consumption can be significantly reduced. As can be seen from the calculation, in the case of the embodiment of FIG. 3, the number of LED light emitters can be reduced by about half compared with the embodiment of FIG. 1, which is very significant. In the scene of LED lighting or display, people are often far away from the LED device, and in this case, under the premise of significantly reducing the number of LED light emitters, the visual effect is not significantly impaired when viewed from a distance, and especially in the case of large-sized LED lighting or display, the requirements for visual effect can be met.

[0056] In another embodiment, the electrode pin includes a first pin and a second pin, and the first pin and the second pin have the following characteristics:

[0057] (1) The first pin is for electrically connecting to the positive electrode of the LED chip in the LED light emitter.

[0058] The second pin is for electrically connecting with the negative terminal of the LED chip in the LED emitter.

[0059] (2) The first pin is for electrically connecting to a first input pin of a drive IC for an LED chip in an LED light emitter.

[0060] The second pin is for electrically connecting with a second input pin of a drive IC for the LED chip in the LED light emitter.

[0061] As can be seen from the embodiment, the LED printed circuit board according to the present invention is not necessarily limited to three or more kinds of pins. Whether the LED is driven by AC or DC, the LED requires a two-wire power supply as a minimum requirement. With the development of LED chip technology, even without a drive IC, a certain number of relatively small LED chips can be used to form an LED light emitter, which can be directly driven by AC or DC. Therefore, the above embodiment is a specific configuration of the first pin and the second pin according to the presence or absence of a drive IC.

[0062] In another embodiment, the electrode pin includes a first pin, a second pin and a third pin, and the first pin, the second pin and the third pin have the following characteristics:

[0063] The first pin is for electrically connecting to the power supply positive terminal / VCC of the LED light emitter.

[0064] The second pin is for electrical connection to the negative power supply / GND terminal of the LED light emitter.

[0065] The third pin is for electrically connecting with the data signal input pin DIN terminal of the LED light emitter.

[0066] This embodiment selects a common scheme of 3 wires and 3 pins, as it is particularly suitable for LED products involving data signal input.

[0067] Regarding this embodiment and the previous embodiment, in the field of driving LEDs, there is already a technology that uses power supply lines such as live / neutral / positive and negative wires to supply power and transmit data signals at the same time, and this technology corresponds to carrier wave technology.

[0068] Therefore, in the case of the previous embodiment, even if only the first pin and the second pin are installed, the data signal can be transmitted, and whether the data signal is for different LED light emitters or is a specific code signal of different LED chips in a single LED light emitter, the transmission of the corresponding data signal can be realized by such carrier wave technology.

[0069] Whether the data signal is specifically an address code signal of an LED light emitter / LED chip, or a color signal of a color when lighting or displaying, the transmission of the corresponding data signal can be realized by such carrier wave technology.

[0070] In another embodiment, the electrode pin further includes a fourth pin, which is for electrically connecting with a data signal output pin DOUT terminal of the LED light emitter.

[0071] In another embodiment, a data input signal wire of the LED light emitter is installed on the front surface of the printed circuit board between the through-hole of the first row and the through-hole of the second row along the first direction of the printed circuit board.

[0072] As shown in FIG. 4, a plurality of data input signal wirings are shown on the left side of FIG. 4, and the plurality of data input signal wirings are 1DI (reference number 1 in FIG. 4), 2DI (reference number 2 in FIG. 4), 3DI (reference number 3 in FIG. 4), etc.

[0073] In another embodiment, the printed circuit board further includes a third row of through holes, and ground wiring for the LED light emitters is installed on the rear surface of the printed circuit board along the first direction on the printed circuit board between the first row of through holes and the second row of through holes, and between the second row of through holes and the third row of through holes, and a first printed circuit board rear area between the first row of through holes and the second row of through holes and a second printed circuit board rear area between the second row of through holes and the third row of through holes are commonly grounded.

[0074] In this embodiment, as shown in FIG. 2, the above-mentioned installation is carried out in order to ensure a common ground for all ground wires and to prevent potential differences resulting from lack of a common ground.

[0075] In another embodiment, the printed circuit board further includes a plurality of first type vias, and the printed circuit board is electrically connected to the power supply negative electrode / GND terminal of the LED light emitter through the first type vias.

[0076] In another embodiment, the printed circuit board further includes a plurality of second type vias, and the printed circuit board is electrically connected to the power supply positive pole / VCC terminal of the LED light emitter through the second type vias.

[0077] Furthermore, as shown in FIG. 2, in another embodiment, the extension direction of both the first row of through holes and the second row of through holes is defined as a first direction parallel to one side (e.g., the top side) of the printed circuit board, and the third row of through holes also extends along the first direction, in which case a conductive trace for connecting two first type vias to the back surface of the printed circuit board is installed along a second direction approximately perpendicular to the first direction.

[0078] Furthermore, in another embodiment, as shown in FIG. 4, on the front surface of the printed circuit board, two second type vias are provided in the island-shaped printed circuit board region, and the two second type vias are connected by a conductive wiring.

[0079] In another embodiment, a first type terminal is provided at each end of the front side of the printed circuit board for electrically connecting with the power supply positive pole / VCC terminal of the LED light emitter, and a second type terminal is provided at each end of the rear side of the printed circuit board for electrically connecting with the power supply negative pole / GND terminal of the LED light emitter.

[0080] This allows the printed circuit board to be cascade-connected to front and rear printed circuit boards having similar structures by connecting the first type terminals and the second type terminals of the two front and rear printed circuit boards in a corresponding manner. The first type terminals and the second type terminals are evenly distributed on both ends of the front of the printed circuit board, and there are multiple first type terminals and second type terminals.

[0081] In another embodiment, a data signal input pin DIN terminal is further provided at each end of the front surface of the printed circuit board for electrically connecting with the LED light emitter.

[0082] In this way, even with the involvement of data signal inputs, the printed circuit board can be cascaded before and after with a similarly constructed printed circuit board.

[0083] In another embodiment, the LED printed circuit board is made of a material that can be bent or deformed freely, which can contribute to realizing more flexible visual effects.

[0084] In another embodiment, the LED printed circuit board selects a transparent material.

[0085] The present invention further provides an LED display device, which uses an LED printed circuit board according to any one of the above embodiments.

[0086] In another embodiment, the LED display device further comprises an LED light emitter.

[0087] In another embodiment, the LED display device does not require any support structure.

[0088] Conventional display devices (e.g., lattice screens) do not have sufficient mechanical strength by themselves and need to be supported by a separate support structure, which includes a lattice structure, a frame other than a lattice structure, etc. In contrast, the LED display device of this embodiment does not have the problem of insufficient mechanical strength, so there is no need to install a support structure.

[0089] In another embodiment, since no IC and / or components are required on the back side of the LED PCB, the LED display device can be mounted on any surface or intermediate layer of any structure.

[0090] The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any modifications or replacements made by those skilled in the art within the technical scope disclosed in the present invention will fall within the protection scope of the present invention. Therefore, the protection scope of the present invention is subject to the scope of the claims.

Claims

1. An LED printed circuit board, The printed circuit board includes a front surface and a rear surface, and a plurality of through holes are provided through the front surface and the rear surface of the printed circuit board; the plurality of through holes includes at least two rows of through holes; At least every third through hole surrounds one island-shaped printed circuit board region on the front surface of the printed circuit board; At least two electrode pins are provided in the island-shaped printed circuit board region, and the electrode pins are for connecting with an LED light emitter installed on the front surface of the printed circuit board. An LED printed circuit board.

2. There is no need to install an IC and / or element for connecting to an LED light emitter on the back surface of the printed circuit board; The LED emitter is located in the island-shaped printed circuit board area and is configured not to block any of the through holes.

2. The LED printed circuit board according to claim 1.

3. each row of through holes in the printed circuit board is provided with equal spacing between adjacent through holes in the row; and / or each row of LED emitters on the printed circuit board is spaced equally apart from adjacent LED emitters within the row.

2. The LED printed circuit board according to claim 1.

4. No need to provide a grid structure in rows or columns on the printed circuit board 2. The LED printed circuit board according to claim 1.

5. At least every fourth through hole surrounds one island-shaped printed circuit board region.

2. The LED printed circuit board according to claim 1.

6. The printed circuit board is polygonal or circular.

2. The LED printed circuit board according to claim 1.

7. When one island-shaped printed circuit board region is surrounded by at least every fourth through hole, A rectangle is formed by lines connecting the geometric centers of the four through holes, and one side of the rectangle is parallel or perpendicular to one side of the printed circuit board; Alternatively, a rectangle is formed by lines connecting the geometric centers of the four through holes, and at least one side of the rectangle is not parallel to any side of the printed circuit board.

2. The LED printed circuit board according to claim 1.

8. The electrode pin has any one of the characteristics (1) to (3), Feature (1): the electrode pin includes a first pin and a second pin; The first pin is for electrically connecting to a positive electrode of an LED chip in the LED light emitter; The second pin is for electrically connecting to the negative electrode of the LED chip in the LED light emitter; Feature (2): the electrode pin includes a first pin and a second pin; The first pin is for electrically connecting to a first input pin of a drive IC of an LED chip in the LED light emitter; The second pin is for electrically connecting to a second input pin of a drive IC of the LED chip in the LED light emitter; Feature (3): the electrode pin includes a first pin, a second pin, and a third pin; The first pin is for electrically connecting to the power supply positive terminal / VCC of the LED light emitter; The second pin is for electrically connecting to the power supply negative electrode / GND terminal of the LED light emitter; The third pin is for electrically connecting with the data signal input pin DIN terminal of the LED light emitter.

2. The LED printed circuit board according to claim 1.

9. The printed circuit board has any one of the features (1) to (2), Feature (1): Between the through holes of the first row and the through holes of the second row, a data input signal wiring of the LED light emitter is installed on the front surface of the printed circuit board along a first direction of the printed circuit board; Feature (2): Between the first row of through holes and the second row of through holes, a data input signal wiring of the LED light emitter is installed on the front surface of the printed circuit board along a first direction of the printed circuit board, and the printed circuit board further includes a third row of through holes; a ground wiring of the LED light emitter is provided on a rear surface of the printed circuit board along a first direction on the printed circuit board between the through hole of the first row and the through hole of the second row and between the through hole of the second row and the through hole of the third row; A first printed circuit board back area between the first row through holes and the second row through holes, and a second printed circuit board back area between the second row through holes and the third row through holes are commonly grounded.

2. The LED printed circuit board according to claim 1.

10. The LED printed circuit board according to any one of claims 1 to 9 is provided. An LED display device characterized by:

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