Large-background LED display screen

Abstract

The utility model discloses a large background light-emitting diode (LED) display screen, which belongs to the technical field of display devices and comprises a rubber frame fixed on a circuit board and a light guide plate arranged on the rubber frame and matched with the rubber frame, and the matching of the rubber frame and the light guide plate realizes that part of background light penetrates into a current touch display area. According to the utility model, the rubber frame is matched with the light guide plate, so that part of background light can penetrate into the current touch display area. The clamping groove is formed in the back face of the light guide plate, the rib lines of the rubber frame are embedded into the clamping groove, and therefore light of the background light source is partially blocked and partially penetrates into the current touch display area. The single-layer light guide plate is clamped on the rubber frame in a matched mode, so that the semi-bright background and the full-bright and semi-bright alternate flickering of the selected icon area can be achieved, the large background display effect of a simulated TFT screen can also be achieved, cost is low, assembly is convenient, the overall thickness is smaller, and more space is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED display screens, and in particular relates to a large-background LED display screen. Background Art

[0002] LED display technology is mature and low-cost, and most household appliances still use LED displays. However, the market and consumers have higher requirements for the operation mode and display effect of the display screen. In addition, the thickness and space occupied by the LED display screen have also become issues of concern in the home appliance industry. The application number of the applicant's prior application is 2024202872121, and the patent name is "A double-layer luminous ultra-thin display module". A double-layer light guide plate is used to achieve a slightly bright and always bright background light. The background light source can make the background light of the entire display module always bright, and the display unit is highlighted under a certain function, which is more convenient for users to operate. The color film can adopt a design pattern and background. Under the illumination of the background light source, the background of the color film presents a very eye-catching and design effect. The entire structure is realized by a foam layer and a light guide plate, without the need for a thicker bracket and lamp cavity, and an independently set digital tube circuit is used. The combination of the above features greatly reduces the thickness of the entire module. The central control system abandons the traditional thick bracket solution and adopts a double-layer light guide plate to achieve the coordination of background light and display light. However, the double-layer light guide plate has an extra step in assembly and the cost becomes higher. In addition, it cannot achieve the customer's latest requirement of a large starry sky background and imitate the display effect of a TFT screen. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a large-background LED display screen which has a smaller overall thickness and can realize a large-background display and a display effect imitating a TFT screen.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A large background LED display screen comprises a plastic frame fixed on a circuit board and a light guide plate arranged on the plastic frame and matched with the plastic frame. The cooperation between the plastic frame and the light guide plate enables part of the background light to pass through the current touch display area.

[0006] Furthermore, a film is arranged above the light guide plate.

[0007] Furthermore, the plastic frame divides the circuit board into a plurality of independent display areas, and each display area is correspondingly provided with an LED light source.

[0008] Furthermore, the LED light source is a side-emitting LED light source, and the LED light source is located between the light guide plate and the outer frame of the rubber frame.

[0009] Furthermore, a card slot is provided on the back side of the light guide plate, and the ribs of the plastic frame are embedded in the card slot.

[0010] Furthermore, the depth of the card slot is half of the depth of the light guide plate, and the cooperation between the card slot of the light guide plate and the rib line of the rubber frame blocks part of the light and transmits part of the light.

[0011] Furthermore, a foam strip for blocking light is arranged on the periphery of the rubber frame.

[0012] Furthermore, a plurality of fixing blocks are arranged on the lower surface of the rubber frame, and the fixing blocks are embedded in the circuit board to fix the rubber frame and the circuit board.

[0013] Furthermore, the touch buttons are arranged on the circuit board.

[0014] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0015] (1) The large background LED display screen of the utility model mainly adopts the combination of a plastic frame and a light guide plate to achieve partial background light transmission into the current touch display area. A card slot is provided on the back of the light guide plate, and the ribs of the plastic frame are embedded in the card slot, so that the light of the background light source is partially blocked and partially transmitted into the current touch display area.

[0016] (2) The large background LED display screen of the present invention adopts the traditional LED light source, and cooperates with the special structural design of the rubber frame and the light guide plate to achieve the display effect of the TFT screen. However, compared with the TFT screen, the structure cost of the present invention is low, and it is easy to control and realize. It is more suitable for promotion and application in household appliances, and is widely applicable to various household appliances such as washing machines, refrigerators, dishwashers, and water purifiers.

[0017] (3) The large background LED display screen of the utility model adopts a single-layer light guide plate that is clamped on a plastic frame, so that the background is half bright, and the selected icon area flashes alternately between full bright and half bright, thereby achieving the display effect of a TFT screen. It has low cost, is easy to assemble, and has a thinner overall thickness, which saves more space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a large background LED display;

[0019] Figure 2 This is a schematic diagram of the structure behind the hidden diaphragm of the large background LED display;

[0020] Figure 3 This is a schematic diagram of the structure of the large background LED display behind the hidden film and light guide plate;

[0021] Figure 4 This is a schematic diagram of the rubber frame structure of the large background LED display;

[0022] Figure 5 It is a schematic diagram of the light guide plate structure of a large background LED display. DETAILED DESCRIPTION

[0023] The present invention will be further explained below in conjunction with specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0024] like Figure 1-5 As shown, a large background LED display screen, the main components include a circuit board 1, a plastic frame 2, a light guide plate 3, a diaphragm 4, an LED light source 6, and a foam strip 7. The circuit board 1, the plastic frame 2, the light guide plate 3 and the diaphragm 4 are arranged in sequence from bottom to top. The LED light source 6 is welded on the circuit board 1, and the diaphragm 4 is pasted on the light guide plate 3. The plastic frame 2 fixed on the circuit board 1 and the light guide plate 3 arranged on the plastic frame 2 and cooperating with the plastic frame 2 realize that part of the background light is transmitted into the current touch display area 5.

[0025] The LED light source 6 is a side-emitting LED light source 6 , and the LED light source 6 is located between the light guide plate 3 and the outer frame of the plastic frame 2 .

[0026] The plastic frame 2 is a plastic frame structure, or a combination of flat rib structures with a relatively small thickness. The plastic frame 2 can be made of plastic material and is integrally injection molded. Since the LED light source 6 is side-emitting, the direction of the light is in the light guide plate 3. Therefore, the thickness of the plastic frame 2 structure can be consistent with the thickness of the light guide plate 3, which is about 1mm to 2mm.

[0027] A slot 31 is provided on the back of the light guide plate 3, and the ribs of the rubber frame 2 are embedded in the slot 31. The slot 31 does not penetrate the light guide plate 3, and the depth of the slot 31 is about 35%-70% of the thickness of the light guide plate 3, so as to achieve a light blocking effect. In this embodiment, the depth of the slot 31 is half of the thickness of the light guide plate 3. Generally, the thickness of the light guide plate 3 is 1mm to 3mm. In this embodiment, the light guide plate is set to be 1mm thick, and the depth of the slot 31 is 0.5mm. The test results show that this depth can block part of the light and allow part of the light to pass through.

[0028] The width of the ribs of the plastic frame 2 gradually decreases from the bottom to the top, so that the ribs can be easily embedded in the card slot 31. The width of the card slot 31 can be set to 0.2 mm to 1.5 mm.

[0029] The plastic frame 2 divides the circuit board 1 into a plurality of independent display areas 5, and each display area 5 is correspondingly provided with an LED light source 6. Touch keys are provided on the circuit board 1, and each display area has an independent touch key.

[0030] A plurality of fixing blocks 21 are disposed on the lower surface of the plastic frame 2. The fixing blocks 21 are embedded in the circuit board 1 to fix the plastic frame 2 to the circuit board 1. The fixing blocks 21 can achieve both positioning and firm connection with the circuit board.

[0031] A light-blocking foam strip 7 is arranged on the periphery of the plastic frame 2 to block light leakage.

[0032] The diaphragm 4 is a colored diaphragm, and the color, pattern and transparency are designed as required. For example, a starry sky background effect can be displayed, and all display area light sources are always on and present a colorful background effect after passing through the light guide plate 3 and the diaphragm 4.

[0033] The use effect of the utility model: when the display screen is turned on, all light sources are lit and half-lit, and the background pattern designed on the membrane 4, such as a starry sky background, is displayed through the light guide plate 3 and the membrane 4. After touching the touch control button of a certain display area 5, the light source of the display area is highlighted and flickers, presenting a periodic alternating state of light and dark, but the light sources of other display areas are always on, serving as background light. At the moment when the LED light source of the currently touched display area is turned off, the light of other display areas as the background light source enters, making the currently touched display area appear half-lit, thereby realizing the alternating display of highlighting and half-lit the button of the touched selected icon area, so that the overall display screen presents a display effect similar to a TFT screen.

[0034] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A large background LED display, characterized by: It comprises a rubber frame (2) fixed on a circuit board (1) and a light guide plate (3) arranged on the rubber frame (2) and cooperating with the rubber frame (2); the cooperation between the rubber frame (2) and the light guide plate (3) enables a portion of the background light to be transmitted into the current touch display area (5).

2. The large background LED display screen according to claim 1, characterized in that: A membrane (4) is arranged above the light guide plate (3).

3. The large background LED display screen according to claim 1, characterized in that: The plastic frame (2) divides the circuit board (1) into a plurality of independent display areas (5), and an LED light source (6) is correspondingly arranged in each display area (5).

4. The large background LED display screen according to claim 3, characterized in that: The LED light source (6) is a side-emitting LED light source (6), and the LED light source (6) is located between the light guide plate (3) and the outer frame of the rubber frame (2).

5. The large background LED display screen according to claim 1, characterized in that: A card slot (31) is provided on the back side of the light guide plate (3), and the ribs of the plastic frame (2) are embedded in the card slot (31).

6. The large background LED display screen according to claim 5, characterized in that: The depth of the card slot (31) accounts for 35%-70% of the depth of the light guide plate (3), and the card slot (31) of the light guide plate (3) cooperates with the ribs of the rubber frame (2) to block part of the light and transmit part of the light.

7. The large background LED display screen according to claim 1, characterized in that: A light-blocking foam strip (7) is arranged on the outer periphery of the rubber frame (2).

8. The large background LED display screen according to claim 1, characterized in that: A plurality of fixing blocks (21) are provided on the lower surface of the rubber frame (2), and the fixing blocks (21) are embedded in the circuit board (1) to fix the rubber frame (2) and the circuit board (1) together.

9. The large background LED display screen according to claim 1, characterized in that: The touch buttons are arranged on the circuit board (1).

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