LED display screen simulating TFT display effect

Abstract

The LED display screen simulating the TFT display effect comprises a light source, a lamp holder and a light guide plate arranged on the lamp holder, the rib position height of a lamp cavity formed by the lamp holder is matched with the light guide plate, and part of background light can penetrate into the semi-transparent lamp cavity. By setting the heights of the rib lines of the different lamp cavities on the lamp holder, the display effect of the display areas corresponding to the different lamp cavities is achieved. The lamp bracket is integrally formed by adopting an injection molding process after being opened, and is simple in structure and convenient to assemble and install. A clamping groove and a through hole are formed in the light guide plate, the clamping groove and the through hole of the light guide plate are matched with lamp cavities with different rib line heights on the lamp holder, and the light guide plate is matched to guide light by adjusting the brightness of each lamp cavity. The large background is semi-bright, and the selected icon area is full-bright and semi-bright and flickers alternately, so that the whole display screen shows the display effect of a simulated TFT (Thin Film Transistor) screen.

Description

Technical Field

[0001] The utility model belongs to the technical field of display screens, and in particular relates to an LED display screen with an imitation TFT display effect. Background Art

[0002] As the requirements for smart display continue to increase, improvements to home appliance displays are becoming more frequent. LED display technology is mature and low-cost, and most home appliances still use LED displays. However, the market and consumers have higher requirements for the operation mode and display effect of the display. The applicant's previous application number is 2024202872140, and the patent name is "A display module with background display", which realizes background display. However, this patent application sets different display light sources and background light sources on different PCB boards to achieve the background light is always on, and after touching a certain display area, a single display area is highlighted. However, this technology divides the light source into two parts on a double-layer circuit board, which has a complex structure; the background light source and the display light source are independently controlled, which increases the complexity of control.

[0003] In addition, according to the requirements of the demander, the background is always on, and the selected area is lit and flashing, or the background area is half-lit, and the selected button icon is fully lit. And the background light is partially transmitted to the display area to achieve a colorful background such as a starry sky background. The existing technology cannot achieve the display requirements of the imitation TFT display effect. Utility Model Content

[0004] The technical problem solved by the utility model is to provide an LED display screen which can block background light and allow part of the background light to pass through the display key area to achieve the imitation TFT display effect.

[0005] Technical solution: In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] An LED display screen with TFT display effect imitation comprises a light source, a lamp frame and a light guide plate arranged on the lamp frame. The rib height of the lamp cavity formed by the lamp frame matches with the light guide plate to achieve partial background light transmission into the semi-transparent lamp cavity.

[0007] Furthermore, the light source is an LED light source, which is divided into a semi-transmissive display area light source, a background light source and a fixed display area light source according to the display area.

[0008] Furthermore, a semi-transparent lamp cavity, a background area lamp cavity and a fixed display area lamp cavity are arranged on the lamp frame.

[0009] Furthermore, the rib height of the background area lamp cavity is less than the rib height of the semi-transparent lamp cavity and less than the rib height of the fixed display area lamp cavity.

[0010] Furthermore, a slot is provided on the back of the light guide plate at a position corresponding to the semi-transparent lamp cavity, and the ribs of the semi-transparent lamp cavity are embedded in the slot to enable the background light source to partially penetrate into the display area corresponding to the semi-transparent lamp cavity.

[0011] Furthermore, the depth of the card slot is half the thickness of the light guide plate.

[0012] Furthermore, the width of the ribs of the semi-transparent lamp cavity gradually decreases from the bottom to the top.

[0013] Furthermore, a through hole is provided on the light guide plate at a position corresponding to the lamp cavity of the fixed display area, and the lamp cavity of the fixed display area passes through the through hole.

[0014] Furthermore, it also includes a PCB board and a diaphragm, the light source is arranged on the PCB board, the PCB board is embedded in the lamp frame, and the diaphragm is arranged above the light guide plate.

[0015] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0016] (1) The LED display screen with TFT display effect of the utility model realizes the display effect of the display area corresponding to different lamp cavities by setting the rib height of different lamp cavities on the lamp frame. The lamp frame is integrally formed by injection molding after the mold is opened, and the structure is simple and easy to assemble.

[0017] (2) The LED display screen with imitation TFT display effect of the utility model is provided with a card slot and a through hole on the light guide plate. The card slot and the through hole of the light guide plate cooperate with the lamp cavity with different rib heights on the lamp frame. When the LED light source of the display area corresponding to the semi-transparent lamp cavity is flashing and is at the moment of being extinguished, part of the background light source enters, so that the display area corresponding to the semi-transparent lamp cavity (such as the touch control button area) appears in a semi-bright state, so that the large background is half-bright, and the selected icon area flashes alternately between full brightness and half brightness, so that the entire display screen presents the display effect of imitation TFT screen.

[0018] (3) The LED display screen imitating TFT display effect of the present invention adopts traditional LED light source, combined with the special structural design of lamp cavity and light guide plate, to achieve the display effect of TFT screen. However, compared with TFT screen, the structure cost of the present invention is low, easy to control and realize, and more suitable for promotion and application in household appliances, and is widely applicable to various household appliances such as washing machines, refrigerators, dishwashers, water purifiers, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded diagram of the LED display structure that imitates TFT display effect;

[0020] Figure 2 This is a schematic diagram of the structure of an LED display screen that imitates TFT display effects Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the structure of an LED display screen that imitates TFT display effects Figure 2 ;

[0022] Figure 4 It is a schematic diagram of the back structure of the light guide plate of an LED display screen that imitates TFT display effect. 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 1-4 As shown, the LED display screen with imitation TFT display effect of the utility model mainly includes a light source 1, a lamp frame 2, a light guide plate 3, a PCB board 4 and a diaphragm 5. The light source 1 is arranged on the PCB board 4, the PCB board 4 is embedded in the lamp frame 2, and the diaphragm 5 is covered on the light guide plate 3 and the periphery is pasted on the outer frame of the lamp frame 2.

[0025] like Figure 1 As shown, the lamp holder 2 is provided with slots of different shapes, and the slots and the PCB board 4 are enclosed together to form a lamp cavity. The lamp holder 2 is integrally formed by an injection molding process. According to different display areas and display requirements, a semi-transparent lamp cavity 21, a background area lamp cavity 22 and a fixed display area lamp cavity 23 are provided on the lamp holder 2.

[0026] like Figure 2 As shown, the light source 1 is an LED light source, which is divided into a semi-transparent display area light source 11, a background light source 12 and a fixed display area light source 13 according to the display area. The semi-transparent display area light source 11 is arranged in a semi-transparent lamp cavity 21, the background light source 12 is arranged in a background area lamp cavity 22, and the fixed display area light source 13 is arranged in a fixed display area lamp cavity 23. All light sources are bottom-emitting light sources, which are welded on the PCB board. After the display screen is turned on, all light sources are lit together, and initially all are in a semi-bright state. The semi-transparent display area light source 11 in the selected icon area is fully lit and flashing.

[0027] The diaphragm 4 is a colored diaphragm, and each display area corresponds to each of the above-mentioned lamp cavities. The display area corresponding to the background area lamp cavity 22 is mainly the background area of ​​the display screen. The color, pattern and transparency are designed according to the needs. If the background area displays a starry sky effect, the transmittance of most areas is low. A light shielding layer can be pasted on the background of the diaphragm to achieve the required low transmittance. The background area light source 12 is always on and presents a colorful background effect after passing through the light guide plate 3 and the diaphragm 4.

[0028] The semi-transparent display area is designed with patterns and texts, and for the sake of display effect and touch convenience, the area of ​​each display area is also relatively large; it is mainly the area where the touch control button is located, and a small part is other status, parameter and other display areas, which are set according to design needs; when the user presses the touch control button with his hand, the LED light source in this area is fully lit and flashes, showing a periodic alternating state of light and off. In order to ensure that the area will not be completely dark when the LED light source is turned off, the utility model design transmits part of the light in the background area into the semi-transparent display area, so that the semi-transparent display area presents a slightly bright effect of anti-TFT screen when the LED light source flashes. The light transmittance of the membrane in this area is relatively high, and the pattern and text of the touch button can be highlighted, which is more eye-catching and easy to operate for users.

[0029] The display area corresponding to the fixed display area lamp cavity 23 mainly displays the content that does not require touch control, usually fixed display text or pattern, or prompt text, or system status, etc. For example, a water purifier displays: the filter element needs to be replaced, water volume and other information, such as the washing machine program status: drying, washing, sterilization on, etc. The diaphragm in this area is fully transparent, and the text is displayed more clearly.

[0030] The utility model mainly adopts the rib height of the lamp cavity formed by the lamp frame 2 to cooperate with the light guide plate 3 to achieve partial background light transmission into the semi-transparent lamp cavity 21. A card slot 31 is provided at a position corresponding to the semi-transparent lamp cavity 21 on the back of the light guide plate 3, and the rib line of the semi-transparent lamp cavity 21 is embedded in the card slot 31, so that the light of the background light source 12 is partially blocked and partially transmitted to the display area corresponding to the semi-transparent lamp cavity 21.

[0031] The card slot 31 does not penetrate the light guide plate 3, and the depth of the card slot 31 is about 35%-70% of the thickness of the light guide plate 3, which can achieve the light blocking effect. In this embodiment, the depth of the card slot 31 is half of the thickness of the light guide plate 3. Generally, the thickness of the light guide plate 3 is 1mm-3mm. In this embodiment, the light guide plate is set to be 1mm thick, and the depth of the card 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. The width of the rib line of the semi-transparent lamp cavity 21 gradually decreases from the bottom to the top, so that the top of the rib line is conveniently embedded in the card slot 31. The width of the card slot 31 can be set to 0.2mm-1.5mm.

[0032] A through hole 32 is provided on the light guide plate 3 at a position corresponding to the fixed display area lamp cavity 23 and the digital tube cavity 24. After the fixed display area lamp cavity 23 and the digital tube cavity 24 pass through the through hole 32, the upper surface contacts the lower surface of the membrane 4. The digital tube cavity 24 is used to accommodate the digital tube. Since the digital tube is relatively thick, the digital tube cavity 24 passes through the digital tube cavity 24 and contacts the lower surface of the membrane 4.

[0033] If the display effects of the background area, the semi-transparent display area and the fixed display area are to be achieved, in this embodiment, the rib height of the background area lamp cavity 22 is less than the rib height of the semi-transparent lamp cavity 21 and less than the rib height of the fixed display area lamp cavity 23. The rib height refers to the horizontal height of the ribs on the periphery of the lamp cavity. By setting the rib heights of different lamp cavities, different presentation effects of light passing through the light guide plate 3 and the membrane 4 can be achieved.

[0034] The rib height of the background area lamp cavity 22 is the lowest. The background area light source 12 is used to illuminate the background area of ​​the membrane in a large area. The rib height of the background area lamp cavity 22 is the lowest among the three lamp cavities and is lower than the lower surface of the light guide plate 3. This setting can present more uniform light, and the rib lines will not be clearly displayed on the outside, thereby ensuring the overall display effect of the background pattern.

[0035] The rib height of the semi-transparent lamp cavity 21 is higher than the rib height of the background area lamp cavity 22, and the rib line part of the background area lamp cavity 22 is embedded in the card slot 31 of the light guide plate 3. The rib height, the card slot and the design block part of the light in the semi-transparent lamp cavity 21 from entering, and allow part of the light in the background area lamp cavity 22 to pass into the semi-transparent lamp cavity 21. When the LED light source in the display area corresponding to the semi-transparent lamp cavity 21 flashes and is turned off at the moment, part of the light in the background area enters, so that the display area corresponding to the semi-transparent lamp cavity (for example, the selected icon area in the touch control button area) appears in a semi-bright state, so that the overall display screen presents a display effect imitating a TFT screen.

[0036] The ribs of the fixed display area lamp cavity 23 are the highest, and after passing through the light guide plate 3, they are in contact with the lower surface of the film, which can completely block the light from the background area and other display areas, so that the fixed display area can clearly display text or pattern content. The ribs of the digital tube cavity 24 are the same as the ribs of the fixed display area lamp cavity 23, and can independently display digital content.

[0037] The use effect of the utility model: when the display screen is turned on, all light sources are lit and in a half-bright state, and the background area light source 12 passes through the light guide plate 3 and the membrane 4 to display the background pattern designed on the membrane 4, such as a starry sky background. The semi-transparent display area is highlighted or fully lit to be presented to the user in a striking manner. After selecting the touch control button of the semi-transparent display area, the semi-transparent display area light source 11 is fully lit and flashing, presenting a periodic alternating state of light and dark. When the LED light source of the display area corresponding to the semi-transparent lamp cavity is flashing and is in the moment of being extinguished, part of the background light source 12 enters, so that the display area corresponding to the semi-transparent lamp cavity (such as the touch control button area) is fully lit and half-lit and flashing alternately, so that the entire display screen presents a display effect imitating a TFT screen. The fixed display area lamp cavity 23 independently displays text or patterns according to program settings.

[0038] 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. An LED display screen with TFT-like display effect, characterized in that: It comprises a light source (1), a lamp frame (2) and a light guide plate (3) arranged on the lamp frame (2); the rib height of the lamp cavity formed by the lamp frame (2) cooperates with the light guide plate (3) to achieve partial background light transmission into the semi-transparent lamp cavity (21).

2. The LED display screen with imitation TFT display effect according to claim 1 is characterized in that: The light source (1) is an LED light source, which is divided into a semi-transmissive display area light source (11), a background light source (12) and a fixed display area light source (13) according to the display area.

3. The LED display screen with imitation TFT display effect according to claim 1 is characterized in that: A semi-transparent lamp cavity (21), a background area lamp cavity (22) and a fixed display area lamp cavity (23) are arranged on the lamp frame (2).

4. The LED display screen with imitation TFT display effect according to claim 3 is characterized in that: The rib height of the background area lamp cavity (22) is less than the rib height of the semi-transparent lamp cavity (21) and less than the rib height of the fixed display area lamp cavity (23).

5. The LED display screen with imitation TFT display effect according to claim 1 is characterized in that: A slot (31) is provided on the back side of the light guide plate (3) at a position corresponding to the semi-transparent lamp cavity (21), and a rib line of the semi-transparent lamp cavity (21) is embedded in the slot (31), so that a part of the background light source (12) is transmitted through the display area corresponding to the semi-transparent lamp cavity (21).

6. The LED display screen with imitation TFT display effect according to claim 5 is characterized in that: The depth of the card slot (31) is 35%-70% of the thickness of the light guide plate (3).

7. The LED display screen with imitation TFT display effect according to claim 1 is characterized in that: The width of the ribs of the semi-transparent lamp cavity (21) gradually decreases from the bottom to the top.

8. The LED display screen with imitation TFT display effect according to claim 1 is characterized in that: A through hole (32) is provided on the light guide plate (3) at a position corresponding to the fixed display area lamp cavity (23), and the fixed display area lamp cavity (23) passes through the through hole (32).

9. The LED display screen with imitation TFT display effect according to claim 1, characterized in that: It also comprises a PCB board (4) and a diaphragm (5), the light source (1) is arranged on the PCB board (4), the PCB board (4) is embedded in the lamp frame (2), and the diaphragm (5) is arranged above the light guide plate (3).

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