LED display device and display equipment

Abstract

The utility model relates to an LED display device and display equipment in the technical field of LED display equipment, which comprises a fixed seat, a chip mounting groove arranged on the fixed seat, three groups of first pins and two groups of second pins, and the polarities of the first pins and the second pins are opposite. The three groups of first pins are arranged at intervals, the two groups of second pins are arranged at intervals, the first pins and the second pins are oppositely embedded into the fixed seat, and the three groups of first pins are electrically connected with a blue light-emitting chip, a green light-emitting chip and a red light-emitting chip respectively. The blue light-emitting chip and the green light-emitting chip are arranged in a common anode or a common cathode mode, the red light-emitting chip is arranged in an independent polarity mode, and the problem that due to the arrangement of four-pin combination of an existing display device, power consumption is large or cost is high in circuit design is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display equipment, in particular to an LED display device and a display equipment. Background Art

[0002] The bracket of the existing LED display device usually adopts a four-pin combination setting to achieve the connection between the RGB chip and the fixation between the device and the PCB board. However, the setting of the four-pin combination will make the circuit design only maintain a common cathode or common anode circuit connection. Therefore, there are problems such as high power consumption of the common anode circuit and high price of the control IC of the common cathode circuit, which will increase the cost. On the other hand, the design of the four-pin combination also has the problem of low fixing stability when fixing the pins to the PCB board. Summary of the invention

[0003] The utility model aims at the shortcomings of the prior art and provides an LED display device and a display apparatus, which solves the problem that the arrangement of the four-pin combination of the prior display device causes high power consumption or high cost in the circuit design.

[0004] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0005] An LED display device comprises a fixing seat, a chip mounting groove opened on the fixing seat, a first pin and a second pin, wherein the first pin is provided in three groups, the second pin is provided in two groups, and the polarity of the first pin is opposite to that of the second pin, the three groups of the first pin are arranged at intervals, the two groups of the second pin are arranged at intervals, the first pin and the second pin are embedded and arranged on the fixing seat opposite to each other, the three groups of the first pin are electrically connected to a blue light-emitting chip, a green light-emitting chip and a red light-emitting chip, respectively, and the blue light-emitting chip and the green light-emitting chip are arranged with a common anode or a common cathode, and the red light-emitting chip is arranged with a single polarity.

[0006] Optionally, when the blue light-emitting chip and the green light-emitting chip are set with a common cathode, the first pin is the anode pin and the second pin is the cathode pin; when the blue light-emitting chip and the green chip are set with a common anode, the first pin is the cathode pin and the second pin is the anode pin.

[0007] Optionally, the fixing seat includes a first fixing portion and a second fixing portion, the second fixing portion is arranged on an upper surface of the first fixing portion, and the second fixing portion does not completely cover the upper surface of the first fixing portion.

[0008] Optionally, the first fixing portion is in a prism shape, and the angle formed by the side wall of the first fixing portion and the vertical plane is 0 to 6°; the second fixing portion is in a truncated cone shape, and the angle formed by the side wall of the second fixing portion and the vertical plane is 0 to 6°.

[0009] Optionally, the depth direction of the chip mounting groove extends from the second fixing portion toward the first fixing portion, and an angle formed between an inner wall of the chip mounting groove and a vertical surface is 20-40°.

[0010] Optionally, the first pin and the second pin both include a power taking part, a connecting part and a power supply part, the power taking part and the power supply part are arranged in parallel, and the connecting part is arranged in a bent shape.

[0011] Optionally, the power supply portion of the first pin and the power supply portion of the second pin are both located in the chip mounting groove, and the power taking portion of the first pin and the power taking portion of the second pin are both located on the lower surface of the fixing seat.

[0012] Optionally, a light reflecting layer is provided on the inner wall of the chip mounting groove.

[0013] Optionally, the surfaces of the blue light-emitting chip, the green light-emitting chip and the red light-emitting chip are coated with a light-transmitting colloid layer.

[0014] A display device comprises a plurality of LED display devices as described in any one of the above items.

[0015] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0016] By setting the polarity of the red light-emitting chip separately, the red light-emitting chip can be set independently, and no resistor needs to be configured, so that the power supply voltage used is small, which saves cost and reduces power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A top view of an LED display device proposed in the first embodiment;

[0019] Figure 2 A cross-sectional view of an LED display device proposed in the first embodiment;

[0020] Figure 3 This is a circuit design diagram of a LED display device proposed in the first embodiment when the blue and green light-emitting chips share a common cathode;

[0021] Figure 4 This is a circuit design diagram of a LED display device proposed in the first embodiment when the blue and green light-emitting chips share a common anode;

[0022] Figure 5 This is a schematic diagram of a step-shaped arrangement of an LED display device proposed in the first embodiment that effectively shields the soldering position of the bottom PCB board.

[0023] Figure numerals: 1. fixing seat; 2. chip mounting groove; 3. first pin; 4. second pin; 5. blue light-emitting chip; 6. green light-emitting chip; 7. red light-emitting chip; 8. first fixing part; 9. second fixing part; 10. power supply part; 11. connecting part; 12. power supply part; 13. light reflecting layer; 14. mask. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the embodiments. The following embodiments are intended to explain the present invention but the present invention is not limited to the following embodiments.

[0025] Embodiment 1

[0026] like Figure 1 and Figure 2 As shown, an LED display device includes a fixing base 1, a chip mounting groove 2 opened on the fixing base 1, a first pin 3 and a second pin 4, three groups of first pins 3 are provided, two groups of second pins 4 are provided, and the polarity of the first pin 3 is opposite to that of the second pin 4, the three groups of first pins 3 are arranged at intervals, and the two groups of second pins 4 are arranged at intervals, the first pin 3 and the second pin 4 are embedded and arranged on the fixing base 1 opposite to each other, the three groups of first pins 3 are electrically connected to a blue light-emitting chip 5, a green light-emitting chip 6 and a red light-emitting chip 7, respectively, and the blue light-emitting chip 5 and the green light-emitting chip 6 are arranged with a common anode or a common cathode, and the red light-emitting chip 7 is arranged with a separate polarity.

[0027] Specifically, when the first pin 3 and the second pin 4 are embedded in the fixing seat 1, one end of the first pin 3 and one end of the second pin 4 are both located in the chip mounting groove 2, and are used to be electrically connected to the light-emitting chip. When electrically connected, the blue light-emitting chip 5, the green light-emitting chip 6, and the red light-emitting chip 7 are welded on the first pin 3 or the second pin 4 by welding copper wire to achieve conduction of the electrical circuit, and the electrical circuit can also be achieved by welding alloy wire or gold wire. The other end of the first pin 3 and the other end of the second pin 4 are both located on the lower surface of the fixing seat 1, and are used to be welded on the PCB board.

[0028] On the other hand, since the starting voltage of the red light-emitting chip 7 is about 1.4V, and the starting voltage of the blue and green light-emitting chips is 1.8~2.2V, that is to say, the starting voltage of the red light-emitting chip 7 is lower than the starting voltage of the blue and green light-emitting chips 6. Since the circuit connection of the traditional RGB light-emitting chip is set to a common anode and a common power supply, the three-color light-emitting chips are in a parallel relationship, and the display device is practically driven by a constant current. If the light-emitting chips are to be lit together, it is necessary to match the chips with resistors, which will increase the power consumption of the display device. Therefore, in order to reduce the power consumption of the display device, this embodiment sets the polarity of the red light-emitting chip 7 separately, so that the red light-emitting chip 7 is set independently, and there is no need to configure resistors. The power supply voltage used is small, which saves costs and reduces power consumption.

[0029] Specifically, Figure 3 As shown, when the red light-emitting chip 7 is set with a separate polarity, if the blue light-emitting chip 5 and the green light-emitting chip 6 are set as a common cathode, the first pin 3 is set as the anode pin, and the second pin 4 is set as the cathode pin; Figure 4 As shown, if the blue light emitting chip 5 and the green chip share a common anode, the first pin 3 is set as a cathode pin, and the second pin 4 is set as an anode pin.

[0030] Furthermore, the first pin 3 and the second pin 4 each include a power taking part 10, a connecting part 11 and a power supply part 12. The power taking part 10 and the power supply part 12 are arranged in parallel, and the connecting part 11 is arranged in a bent shape. The power supply part 12 of the first pin 3 and the power supply part 12 of the second pin 4 are both located in the chip mounting groove 2, and the power taking part 10 of the first pin 3 and the power taking part 10 of the second pin 4 are both located on the lower surface of the fixing seat 1.

[0031] When the blue light-emitting chip 5 and the green light-emitting chip 6 share a common cathode, the positive conductive ends of the blue light-emitting chip 5, the green light-emitting chip 6, and the red light-emitting chip 7 are respectively welded to the power supply part 12 of the three groups of anode pins through copper wires, and at the same time, the negative conductive ends of the blue light-emitting chip 5 and the green light-emitting chip 6 are welded to the power supply part 12 of the same cathode pin through copper wires, and the negative conductive end of the red light-emitting chip 7 is separately welded to the power supply part 12 of another cathode pin through copper wires.

[0032] When the blue light-emitting chip 5 and the green light-emitting chip 6 are a common anode, the negative conductive ends of the blue light-emitting chip 5, the green light-emitting chip 6, and the red light-emitting chip 7 are respectively welded to the power supply part 12 of the three groups of cathode pins through copper wires, and at the same time, the positive conductive ends of the blue light-emitting chip 5 and the green light-emitting chip 6 are welded to the power supply part 12 of the same anode pin through copper wires, and the positive conductive end of the red light-emitting chip 7 is separately welded to the power supply part 12 of another anode pin through copper wires.

[0033] Thus, the first pin 3 and the second pin 4 transfer the electric energy provided on the PCB board to the connecting part 11 through the power taking part 10, and transfer it to the power supply part 12 via the connecting part 11, and finally power the blue light-emitting chip 5, the green light-emitting chip 6, and the red light-emitting chip 7 through the power supply part 12, thereby realizing blue, green and red light emission.

[0034] On the other hand, in the present embodiment, a total of five groups of pins are provided. Compared with the existing setting of four groups of pins with a common anode or a common cathode, when the display device is mounted on a PCB board, the five groups of pins in the present embodiment have a larger contact area with the PCB board. Therefore, the LED display device is more stable than the traditional four-group pin design.

[0035] Furthermore, if Figure 2 As shown, the fixing seat 1 includes a first fixing portion 8 and a second fixing portion 9. The second fixing portion 9 is arranged on the upper surface of the first fixing portion 8, and the second fixing portion 9 does not completely cover the upper surface of the first fixing portion 8. At this time, the side wall of the second fixing portion 9 forms a step shape with the side wall of the first fixing portion 8.

[0036] Since the conventional display device does not have a step-shaped design, the reserved dimensional tolerance of the mask 14 is relatively large, and there is a risk of exposing the bottom pad, resulting in reduced contrast and poor color consistency between panels. Therefore, in this embodiment, the fixing seat 1 is configured as a first fixing portion 8 and a second fixing portion 9, and a step is formed between the first fixing portion 8 and the second fixing portion 9. Specifically, as Figure 5 As shown, when the mask 14 is mounted on the outside, the fixing base 1 of this embodiment can effectively cover the PCB board at the bottom ( Figure 5 The first fixing portion 8 is partially covered by the mask 14, thereby shielding the welding position of the display device on the PCB board, so that the appearance consistency of the display screen composed of the display devices is better.

[0037] Furthermore, in the present embodiment, the first fixing portion 8 is arranged to be in a prism shape, and the angle formed by the side wall of the first fixing portion 8 and the vertical plane is 0 to 6°; the second fixing portion 9 is in a truncated cone shape, and the angle formed by the side wall of the second fixing portion 9 and the vertical plane is 0 to 6°, that is, the draft angle α of the side walls of the first fixing portion 8 and the second fixing portion 9 are both set to 3°±3°. In the present embodiment, the width of the step surface formed by the second fixing portion 9 and the first fixing portion 8 is set to 0.05mm-1.0mm, the height of the first fixing portion 8 is set to 0.25mm-0.5mm, the height of the second fixing portion 9 is set to 0.8mm-1.2mm, and the length, width and height dimensions of the overall fixing seat 1 are set to 0.9mm-2.0mm.

[0038] The depth direction of the chip mounting groove 2 extends from the second fixing portion 9 to the first fixing portion 8, and the angle formed by the inner wall of the chip mounting groove 2 and the vertical plane is 20-40°, that is, the demoulding angle of the inner wall of the chip mounting groove 2 is set to 30°±10°, and the depth of the chip mounting groove 2 is set to between 0.35mm-0.6mm.

[0039] Furthermore, a light reflecting layer 13 is provided on the inner wall of the chip mounting groove 2, and the surfaces of the blue light-emitting chip 5, the green light-emitting chip 6 and the red light-emitting chip 7 are coated with a light-transmitting glue layer. After the light-emitting chip is welded on the first pin 3 and the conduction welding of the electrical circuit is completed, in order to protect the light-emitting chip, a light-transmitting glue layer is coated on the surfaces of the blue light-emitting chip 5, the green light-emitting chip 6 and the red light-emitting chip 7, and sealed with packaging materials such as epoxy resin, silicone resin, and silica gel. The light-transmitting glue layer can be glue, thereby protecting the light-emitting chip and the welding wire; at the same time, the light reflecting layer 13 located on the inner wall of the chip mounting groove 2 is used to realize light reflection when the light-emitting chip emits light.

[0040] Embodiment 2

[0041] A display device includes a plurality of LED display devices as described in the first embodiment, such as an electronic display screen, etc., which is realized by welding a plurality of LED display devices on a PCB board.

[0042] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different. All equivalent or simple changes made based on the structure, features and principles described in the concept of the utility model patent are included in the protection scope of the utility model patent. The technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar way, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. An LED display device, characterized in that: It includes a fixing seat, a chip mounting groove opened on the fixing seat, a first pin and a second pin, the first pin is provided in three groups, the second pin is provided in two groups, and the polarity of the first pin is opposite to that of the second pin, the three groups of the first pins are arranged at intervals, and the two groups of the second pins are arranged at intervals, the first pin and the second pin are embedded and arranged on the fixing seat opposite to each other, the three groups of the first pins are electrically connected to a blue light-emitting chip, a green light-emitting chip and a red light-emitting chip, respectively, and the blue light-emitting chip and the green light-emitting chip are arranged with a common anode or a common cathode, and the red light-emitting chip is arranged with a separate polarity, wherein the fixing seat includes a first fixing part and a second fixing part, the second fixing part is arranged on the upper surface of the first fixing part, and the second fixing part does not completely cover the upper surface of the first fixing part.

2. The LED display device according to claim 1, characterized in that: When the blue light-emitting chip and the green light-emitting chip are arranged with a common cathode, the first pin is the anode pin and the second pin is the cathode pin; when the blue light-emitting chip and the green chip are arranged with a common anode, the first pin is the cathode pin and the second pin is the anode pin.

3. The LED display device according to claim 1, characterized in that: The first fixing portion is in a prism shape, and the angle formed by the side wall of the first fixing portion and the vertical plane is 0-6°; the second fixing portion is in a truncated cone shape, and the angle formed by the side wall of the second fixing portion and the vertical plane is 0-6°.

4. The LED display device according to claim 1, characterized in that: The depth direction of the chip mounting groove extends from the second fixing portion to the first fixing portion, and the angle formed by the inner wall of the chip mounting groove and the vertical surface is 20-40°.

5. The LED display device according to claim 1, characterized in that: The first pin and the second pin both include a power taking portion, a connecting portion and a power supply portion. The power taking portion and the power supply portion are arranged in parallel, and the connecting portion is arranged in a bent shape.

6. The LED display device according to claim 5, characterized in that: The power supply part of the first pin and the power supply part of the second pin are both located in the chip mounting groove, and the power taking part of the first pin and the power taking part of the second pin are both located on the lower surface of the fixing seat.

7. The LED display device according to claim 1, characterized in that: A light reflecting layer is arranged on the inner wall of the chip mounting groove.

8. The LED display device according to claim 1, characterized in that: The surfaces of the blue light-emitting chip, the green light-emitting chip and the red light-emitting chip are coated with a light-transmitting colloid layer.

9. A display device, characterized in that: The display device comprises a plurality of LED display devices as described in any one of claims 1-8.

Images