Display module and household appliance

Abstract

The utility model discloses a display module and home electrical equipment relates to display technical field, the display module includes: circuit board, set up in the circuit board a plurality of LED and touch chip, cover in the circuit board cover plate and cover the pattern film of cover plate surface, the cover plate is provided with the reflection cavity on the position of a plurality of LED corresponding, the reflection cavity inside is inlayed with the light guide plate, the circuit arrangement structure of circuit board forms the copper foil electrode in the area corresponding to the reflection cavity, the copper foil electrode with touch chip electric connection. Adopt LED and light guide plate cooperation to realize the lighting display to pattern film, and the light of LED is handled even through the light guide plate, thereby improves the light evenness of display module, through to the light guide plate structure adjustment, makes LED and light guide plate adapt in the reflection cavity, makes the overall size compact of display module, can realize the structure design of ultrathin.

Description

Technical Field

[0001] This utility model relates to the field of display technology, specifically to a display module and a home appliance. Background Technology

[0002] The existing display modules of home appliance control panels need to distinguish different functional zones. In order to facilitate control and improve the convenience of circuit design, they mainly adopt the direct-lit display control method. This method is prone to uneven light distribution and display defects such as "bright spots" and "dark areas". The existing direct-lit structure design arranges the LEDs on the back panel, resulting in a thicker overall structure of the display module, which is difficult to adapt to the design requirements of ultra-thin and integrated modern home appliances or equipment. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides a display module and home appliance. By cooperating between LED and light guide plate, the light emitted by the display module is uniform and the overall thickness of the display module can be reduced, which is suitable for the design requirements of ultra-thin and integrated modern home or equipment.

[0004] This utility model provides a display module, which includes: a circuit board, a plurality of LEDs disposed on the circuit board, a cover plate covering the circuit board, and a patterned film covering the surface of the cover plate; The cover plate is provided with a reflective cavity at the position corresponding to a number of LEDs, and a light guide plate is embedded inside the reflective cavity; At least one sidewall portion of the light guide plate extends outward to form a stepped structure, and the stepped structure of the light guide plate and the inner sidewall of the reflective cavity form a placement area for accommodating a number of LEDs.

[0005] Furthermore, the cover plate is made of one of the following materials: PPO, PC, ABS, HIPS, or opaque silicone.

[0006] Furthermore, the stepped surface of the light guide plate has serrated stripes.

[0007] Furthermore, a reflective film is provided on the side of the light guide plate that is connected to the circuit board, and a diffusion film is provided on the light-emitting surface of the light guide plate.

[0008] Furthermore, a light-shielding film is provided at the location of the diffusion film corresponding to the step structure, and the width of the light-shielding film is greater than the width of the step surface of the step structure.

[0009] Furthermore, the bottom of the light guide plate is provided with several microstructures arranged in an array, and the microstructures extend from the bottom part of the light guide plate into the interior of the light guide plate.

[0010] Furthermore, the microstructure is a cylindrical structure or a dot-like structure.

[0011] Furthermore, the circuit board is a rigid circuit board, or the circuit board is a rigid-flexible composite board.

[0012] Furthermore, the display module also includes a touch chip disposed on the circuit board, and the circuit layout structure of the circuit board forms a copper foil electrode in the area corresponding to the reflective cavity, and the copper foil electrode is electrically connected to the touch chip.

[0013] Furthermore, the circuit board is provided with several functional modules, including one or more of the following: WiFi module, infrared module, and voice module.

[0014] This utility model also provides a home appliance, which is provided with a display panel, and the display panel is provided with the display module.

[0015] This utility model provides a display module and home appliance, which uses LEDs and a light guide plate to illuminate the pattern film. The light guide plate uniformizes the light from the LEDs, thereby improving the light uniformity of the display module. By adjusting the structure of the light guide plate, the LEDs and the light guide plate are fitted into the reflective cavity, making the overall size of the display module compact and enabling an ultra-thin structural design. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the display module in an embodiment of this utility model; Figure 2 This is an exploded view of the display module structure in an embodiment of this utility model; Figure 3 This is a schematic diagram of the mating surface structure of the light guide plate of the display module in this embodiment of the present invention; Figure 4 This is a schematic diagram of the light-emitting surface structure of the light guide plate of the display module in this embodiment of the present invention; Figure 5 This is a side view of the structure of the light guide plate of the display module in this embodiment of the utility model; Figure 6 This is a side view of the structure of the light guide plate of the display module in this embodiment of the utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Please refer to Figures 1 to 6 This utility model embodiment provides a display module, which includes: a circuit board 5, a plurality of LEDs 4 and a touch chip disposed on the circuit board 5, a cover plate 2 covering the circuit board 5, and a pattern film 1 covering the surface of the cover plate 2. The cover plate 2 covers the surface of the circuit board 5, so that the cover plate 2 and the pattern film 1 can cover the circuit board 5.

[0019] Furthermore, the circuit board 5 and the cover plate 2 are assembled by the hot melt pillar of the cover plate 2 and the corresponding connection hole of the circuit board 5, and then melted and fixed. The pattern film 1 and the cover plate 2 are bonded together by the adhesive on the back of the pattern film 1, thereby realizing the overall structural encapsulation of the display module.

[0020] The cover plate 2 has several reflective cavities 21 at the positions corresponding to several LEDs 4. Several LEDs 4 are located at the inner edge of the cavity of the reflective cavity 21. A light guide plate 3 is embedded inside the reflective cavity 21. The reflective cavity 21 is used to limit the light guide plate 3 and reflect the light passing through the reflective cavity 21 to reduce the light loss of the LEDs 4 in the reflective cavity 21 and ensure the light guiding effect of the light guide plate 3.

[0021] Furthermore, the light emitted from the side of the LED4 is emitted from the front of the display module through the light guide plate 3, so that the light guide plate 3, together with the pattern layer, can realize the pattern display effect of the display module. In the display area of ​​the display module, the bright spots of the LED beads can be avoided directly, thus achieving the effect of hiding the "lamp eyes" of the display module and improving the display effect of the display module.

[0022] The circuit board 5 has a copper foil electrode 7 formed in the area corresponding to the reflective cavity 21. The copper foil electrode 7 is electrically connected to the touch chip. No external electrodes or additional components such as sensing springs are required. The touch sensing function is completed directly using the circuit board 5 itself, which simplifies the circuit layout of the circuit board 5 and improves the integration of the display module.

[0023] Furthermore, the working principle between the touch chip and the copper foil electrode 7 is as follows: the touch chip identifies the sensing signal by sensing the capacitance change between the copper foil electrode 7 and the target. The target can be a conductor such as a user's finger. Existing touch chips have a sensing distance of 5mm to 15mm for penetrating non-metallic panels. In this embodiment, by optimizing the size design of the copper foil electrode 7, the sensing distance between the touch chip and the copper foil electrode 7 can meet the penetration sensing requirements of the light guide plate 3.

[0024] Furthermore, by using LED4 to emit light from the side in conjunction with the light guide plate 3, an ultra-thin structure design for the display module can be achieved, which greatly reduces the overall thickness of the display module. By integrating copper foil electrodes 7 inside the reflective cavity 21, the circuit layout structure of the display module can be customized according to the touch display requirements, reducing the overall structural size of the display module and ensuring the accuracy of the touch display effect of the display module.

[0025] Furthermore, the display module can precisely control the touch sensitivity by adjusting the area, shape, and spacing of the copper foil electrodes 7 on the circuit board 5 to adapt to different application scenarios. According to the actual touch operation requirements, various interaction forms such as single keys, combination keys, and sliding touch can be designed to meet the display requirements of several function keys on the operation panel of home appliances. For example, it can realize the panel display of different operation keys such as "power switch", "mode selection", "function selection", and "gear adjustment". By adjusting the pattern and circuit design of the copper foil electrodes 7 during the circuit structure design stage of the circuit board 5, different touch display modes can be designed to improve product iteration efficiency.

[0026] Furthermore, the circuit board 5 is provided with several functional modules, including one or more of WiFi, infrared, and voice modules. According to actual application requirements, the circuit design of the circuit board 5 can meet the design requirements of wireless transmission circuits such as WiFi and infrared functions. In conjunction with the copper foil electrode 7 and the touch chip, the display partitions of the display module corresponding to the functional modules can meet the user's touch operation, thereby improving the practicality and versatility of the display module.

[0027] Specifically, the cover plate 2 is a structural component used to cover the circuit board 5 and support the light guide plate 3. It can be injection molded from mainstream injection molding materials such as PPO (Polyphenylene Oxide), ABS (Acrylonitrile Butadiene Styrene plastic), HIPS (High Impact Polystyrene), and PC (Polycarbonate). It has excellent light blocking performance, can effectively prevent unnecessary light leakage, and supports ultra-thin design.

[0028] Furthermore, the cover plate 2 can also be made of opaque silicone, which has a natural opaque barrier function and low density characteristics, while providing additional buffer protection for the display module.

[0029] Specifically, at least one sidewall portion of the light guide plate 3 extends outward to form a stepped structure 31. The stepped structure 31 of the light guide plate 3 and the inner sidewall of the reflective cavity 21 form a placement area for accommodating a plurality of LEDs 4. That is, when the cover plate 2 covers the circuit board 5, a plurality of LEDs 4 of the circuit board 5 can be correspondingly accommodated in the placement area, and the plurality of LEDs 4 are close to the inner wall of the reflective cavity 21, so that the light emission direction of the LEDs 4 can be towards the light guide plate 3, so that the LEDs 4 of the circuit board 5 can emit light outward through the light guide plate 3.

[0030] Furthermore, the display module can be adapted to the LED installation requirements of direct-lit displays, so that the light emission direction of the LED4 faces the stepped surface of the stepped structure 31 of the light guide plate 3, and the light emission of the LED4 is homogenized based on the light guide plate 3. The display module can also be adapted to the LED installation requirements of side-lit displays, so that the light emission direction of the LED4 faces the sidewall of the stepped structure 31, thereby achieving uniform light emission display through the light guide plate 3.

[0031] Specifically, the stepped surface of the stepped structure 31 of the light guide plate 3 is provided with toothed stripes 311. When the display module is a direct-mount structure, the light emitted by the LED 4 can enter the light guide plate 3 after passing through the toothed stripes 311 on the stepped surface. Based on the toothed stripes 311, the light emitted by the LED 4 is evenly dispersed, which can improve the uniformity of the incident light of the light guide plate 3. By changing the propagation behavior of the light emitted by the LED 4 on the light incident surface of the light guide plate 3, the uniformity of light distribution is improved, thereby avoiding the local concentration of light energy in the light guide plate 3 and the formation of bright spots or dark areas in the display area.

[0032] Specifically, a reflective film 8 is provided on the side of the light guide plate 3 that is connected to the circuit board 5, and a diffusion film 6 is covered on the light-emitting surface of the light guide plate 3. The reflective film 8 is used to reflect the light inside the light guide plate 3. The high reflectivity film layer is used for reflection, thereby improving the brightness of the light guide plate 3.

[0033] Furthermore, the diffuser film 6 is covered with a light-shielding film 9 at the position corresponding to the stepped structure 31. The light-shielding film 9 can be a black film structure, which can cover and shield the LED 4 position of the display module to avoid light spots.

[0034] Furthermore, the width of the light-shielding film 9 is greater than the width of the step surface of the step structure 31, so that the coverage area of ​​the light-shielding film 9 can be greater than the step surface of the step structure 31, thereby avoiding the appearance of bright edges at the position of the light-shielding film 9 and improving the display effect of the display module.

[0035] Specifically, the bottom of the light guide plate 3 is provided with a plurality of microstructures arranged in an array. These microstructures extend from the bottom portion of the light guide plate 3 into its interior, forming a microstructure array within the light guide plate 3. Each microstructure refers to a structural unit with a specific shape and optical function, processed within the light guide plate 3. These microstructures improve the uniformity of light diffusion within the light guide plate 3, optimizing the uniformity of light distribution by altering the light propagation path within the light guide plate 3, thereby preventing bright spots and dark areas from appearing in the display area.

[0036] Furthermore, the microstructure can be a cylindrical structure or a dot-like structure. According to the actual processing requirements, the shape and size of the microstructure inside the light guide plate 3 can be adjusted so that the microstructure inside the light guide plate 3 can achieve the effect of uniform distribution of light inside the light guide plate 3.

[0037] Furthermore, the distribution density of several microstructures can be adjusted based on the size design of each individual microstructure, ensuring that the distribution of microstructures meets the requirement of uniform light emission. The size design of each individual microstructure can adjust its light control performance. When the distribution density of several microstructures is low, larger microstructures can be adapted, thereby enhancing the light output of a single dot and preventing uneven brightness in the ambient light. When the distribution density of several microstructures is high, smaller microstructures can be adapted, thereby preventing localized overbrightness in the ambient light.

[0038] Specifically, the circuit board 5 is a rigid circuit board, which can be either an FR4 (Flame-Retardant-4, flame retardant rating 4) substrate or an aluminum substrate. The circuit board 5 can also be a rigid-flexible composite board. Different materials of circuit board 5 structures can be selected according to the actual product processing requirements to meet the installation requirements of LED 4 and the display requirements of the display module.

[0039] Specifically, the shape and contour of the copper foil electrode 7 are consistent with the shape and contour of the reflective cavity 21. The copper foil electrode 7 is a conductive element used to realize the touch function. By forming the copper foil electrode 7 at the position corresponding to the reflective cavity 21 when etching copper lines on the circuit board 5, the shape and contour of the copper foil electrode 7 can be precisely matched according to the specific geometric boundary of the reflective cavity 21, which can ensure the spatial consistency between the touch sensing area and the display area, so as to improve the accuracy of the user's touch operation.

[0040] Furthermore, the size of the copper foil electrode 7 is smaller than the size of the outline of the reflective cavity 21, and the copper foil electrode 7 and the outline of the reflective cavity 21 are arranged concentrically. The LED 4 is located between the copper foil electrode 7 and the inner wall of the reflective cavity 21. The electrical connection positions of the copper foil electrode 7 and the LED 4 are insulated to avoid the risk of short circuits in the circuit layout of the circuit board 5, thereby improving the reliability of the circuit structure layout of the circuit board 5.

[0041] Specifically, this utility model embodiment also provides a home appliance, which is provided with a display panel and a display module. That is, the display module can be applied to home appliances such as air conditioners and refrigerators. By optimizing the structure of the light guide plate 3, the LED 4 is set at the side wall of the light guide plate 3, realizing an ultra-thin display module structure design, which can be applied to the structure design of the touch display panel of home appliances, and improving the convenience and versatility of the display module installation.

[0042] This utility model embodiment provides a display module that uses LEDs and a light guide plate 3 to illuminate and display the pattern film 1. The LEDs and the copper foil electrodes 7 of the circuit board 5 are integrated in the pattern display area. The touch function is realized by electrically connecting the copper foil electrodes 7 to the touch IC 6 chip. This makes the overall size of the display module compact and enables an ultra-thin structural design. Using the copper foil electrodes 7 of the circuit board 5 as touch electrodes simplifies the structural design of the circuit board 5 and improves the ease of manufacturing the display module.

[0043] Furthermore, the above description provides a detailed overview of the display module and home appliance provided by the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A display module, characterized in that, The display module includes: a circuit board, a plurality of LEDs disposed on the circuit board, a cover plate covering the circuit board, and a patterned film covering the surface of the cover plate; The cover plate is provided with a reflective cavity at the position corresponding to a number of LEDs, and a light guide plate is embedded inside the reflective cavity; At least one sidewall portion of the light guide plate extends outward to form a stepped structure, and the stepped structure of the light guide plate and the inner sidewall of the reflective cavity form a placement area for accommodating a number of LEDs.

2. The display module as described in claim 1, characterized in that, The cover plate is made of one of the following materials: PPO, PC, ABS, HIPS, or opaque silicone.

3. The display module as described in claim 1, characterized in that, The stepped surface of the light guide plate has toothed stripes.

4. The display module as described in claim 1, characterized in that, A reflective film is provided on the side of the light guide plate that is connected to the circuit board, and a diffusion film is provided on the light-emitting surface of the light guide plate.

5. The display module as described in claim 4, characterized in that, The diffusion film is covered with a light-shielding film at the location of the step structure, and the width of the light-shielding film is greater than the width of the step surface of the step structure.

6. The display module as described in claim 1, characterized in that, The bottom of the light guide plate is provided with several microstructures arranged in an array, and the microstructures extend from the bottom part of the light guide plate into the interior of the light guide plate.

7. The display module as described in claim 6, characterized in that, The microstructure is either a cylindrical structure or a point-like structure.

8. The display module as described in claim 1, characterized in that, The circuit board is a rigid circuit board, or the circuit board is a rigid-flexible composite board.

9. The display module as described in claim 1, characterized in that, The display module also includes a touch chip disposed on the circuit board. The circuit layout structure of the circuit board forms a copper foil electrode in the area corresponding to the reflective cavity, and the copper foil electrode is electrically connected to the touch chip.

10. The display module as described in claim 1, characterized in that, The circuit board is provided with several functional modules, including one or more of the following: WiFi module, infrared module, and voice module.

11. A household appliance, characterized in that, The home appliance is provided with a display panel, and the panel is provided with a display module as described in any one of claims 1 to 10.

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