Capacitive touch LED display

Abstract

The utility model discloses a capacitive touch LED (light-emitting diode) display, which comprises an LED light-emitting component and a diaphragm component, and the diaphragm component is fixed on the light-emitting surface of the LED light-emitting component; the diaphragm assembly comprises a dark film, a transparent film, a white film and an insulating film, the dark film is attached to the front face of the transparent film, a first pattern and a first shading layer are printed on the back face of the transparent film, the transparent film is attached to the front face of the white film, a capacitive touch circuit is printed on the back face of the white film, the capacitive touch circuit is coated with conductive ink, and the insulating film is attached to the back face of the white film. The insulating film is opposite to the light-emitting surface of the LED light-emitting component; the white film is provided with a terminal, the capacitive touch circuit is electrically connected with the terminal, and the terminal is electrically connected with the LED light-emitting assembly. When the display is in a non-working state, a user observes that the display surface of the display is integrated, and meanwhile, the display is thinner in structure and lower in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display, in particular to a capacitive touch LED display. Background Art

[0002] Existing large appliances, small appliances, smart homes, industrial control, and 3C appliances, such as rice cookers, soup pots, range hoods, disinfection cabinets, dishwashing cabinets, and microwave ovens, are equipped with corresponding display screens / LED light groups and buttons or touch screens to achieve corresponding human-computer interaction control functions.

[0003] The traditional display interaction system consists of an LED light group, a backlight panel, a pattern film and a key module. When this system is in use, all patterns are illuminated by the backlight panel and LED lights, and the function logo is realized by switching different LED lights to be constantly on or flashing. Among them, the key module can be upgraded to a capacitive touch module.

[0004] However, when the existing pattern-lit LED display is turned off, its patterns, digital light tubes, etc. are directly displayed, and users can observe their colors and outlines more clearly. That is, when the display is turned off, the front panel observed by the user is not pure color, but is separated.

[0005] To solve this problem, some manufacturers use a high-resolution capacitive touch display and a dark front panel to achieve pure color display when the display is off. However, compared with the LED light pattern film, the high-resolution capacitive touch display is more expensive and more complex to control. This design is mostly used in high-end home appliances.

[0006] Therefore, there is an urgent need for a capacitive touch LED display that can solve one or more of the above problems. Utility Model Content

[0007] To address one or more problems existing in the prior art, the present invention provides a capacitive touch LED display. The present invention employs the following technical solutions to address the aforementioned problems: a capacitive touch LED display comprising: an LED light-emitting assembly and a diaphragm assembly, wherein the diaphragm assembly is fixed to the light-emitting surface of the LED light-emitting assembly, and the LED light-emitting assembly is used to illuminate and control the diaphragm assembly;

[0008] The film assembly includes: a dark film, a transparent film, a white film, and an insulating film. The dark film is attached to the front of the transparent film. The back of the transparent film is printed with a first pattern and a first light-shielding layer, and the first light-shielding layer avoids the first pattern. The transparent film is attached to the front of the white film. The back of the white film is printed with a capacitive touch circuit. The touch area of ​​the capacitive touch circuit is painted with conductive ink. The insulating film is attached to the back of the white film. The insulating film is opposite to the light-emitting surface of the LED light-emitting component.

[0009] The white film is provided with a terminal, the capacitive touch circuit is electrically connected to the terminal, and the terminal is electrically connected to the LED light-emitting component.

[0010] In some embodiments, frosted textures are formed on the front and / or back of the dark film.

[0011] In some embodiments, a second light-shielding layer is printed on the front surface of the white film, and the second light-shielding layer avoids the first pattern.

[0012] Furthermore, a second pattern is printed on the front side of the white film, and the second light-shielding layer avoids the second pattern.

[0013] In some embodiments, the conductive ink is a transparent conductive ink, and the insulating film is a transparent insulating film.

[0014] In some embodiments, the invention further comprises: a buffer foam, wherein the buffer foam is arranged between the insulating film and the light-emitting surface of the LED light-emitting component, and the buffer foam forms an avoidance groove with an avoidance pattern.

[0015] In some embodiments, the LED light-emitting component includes: a shell and a PCB, the PCB is installed in the shell, and the PCB is provided with: an LED circuit, an LED driving circuit, a main control circuit, a capacitive sensing control circuit and a capacitive touch control circuit, and the capacitive touch circuit is electrically connected to the capacitive sensing control circuit and the capacitive touch control circuit; the shell is provided with a light-transmitting groove, and the spatial position of the light-transmitting groove corresponds to the LED lamp bead of the LED circuit; further, the shell is connected to a corresponding bottom shell.

[0016] Furthermore, the lighting structure of the LED light-emitting component is front lighting or side lighting. When the LED light-emitting component is a side lighting structure, the housing is provided with a corresponding light guide plate.

[0017] Furthermore, the light emitting angle of the LED lamp bead is 120° to 160°.

[0018] The technical effect achieved by the utility model is: pattern lighting display is realized by the above-mentioned diaphragm assembly and LED light-emitting assembly, wherein the above-mentioned diaphragm assembly is used to realize that the outer side of the front panel, i.e., the dark film, is in a dark pure color state when the LED light is turned off; it is difficult for the user to observe the pattern outline, pattern color and the color of the non-dark film when observing the outside of the display in low light or strong light indoors, so that when the display is not working, the user observes its display surface as a whole; furthermore, when the display is in normal working condition, the LED light can illuminate the pattern normally through the above-mentioned diaphragm assembly, thereby displaying the corresponding outline and color, and the user can also perform touch control according to the corresponding light-emitting pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded schematic diagram of the utility model;

[0020] Figure 2 This is an exploded schematic diagram of the diaphragm assembly of the present invention;

[0021] Figure 3 This is an exploded schematic diagram of the LED light-emitting component of the present invention;

[0022] Figure 4 is a schematic diagram of a first pattern of the transparent film of the present invention;

[0023] Figure 5 This is a schematic diagram of a capacitive touch circuit of the present invention;

[0024] Figure 6 This is the principle diagram of the LED circuit of the utility model;

[0025] Figure 7 This is a schematic diagram of the LED driving circuit of the present utility model;

[0026] Figure 8 This is a schematic diagram of the main control circuit of the present utility model;

[0027] Figure 9 This is a schematic diagram of the capacitance sensing control circuit of the present utility model;

[0028] Figure 10 This is a schematic diagram of the capacitive touch control circuit of the present invention.

[0029] Reference numerals

[0030] 1. LED light-emitting component 10, housing 100, light-transmitting groove 11, PCB 12, bottom shell 2, membrane assembly 20, dark film 21, transparent film 22, white film 220, capacitive touch circuit 221, touch area 222, FPC terminal 23, insulating film 24, buffer foam 240, avoidance groove. DETAILED DESCRIPTION

[0031] To make the above-mentioned objects, features, and advantages of the present invention more readily understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] like Figure 1-Figure 3 As shown, the utility model discloses a capacitive touch LED display, which includes: an LED light-emitting component 1 and a diaphragm component 2, wherein the diaphragm component 2 is fixed to the light-emitting surface of the LED light-emitting component 1, and the LED light-emitting component 1 is used to illuminate the diaphragm component 2 and perform control;

[0033] The film assembly 2 includes: a dark film 20, a transparent film 21, a white film 22 and an insulating film 23. The dark film 20 is attached to the front of the transparent film 21. The back of the transparent film 21 is printed with a first pattern and a first light-shielding layer. The first light-shielding layer avoids the first pattern. The transparent film 21 is attached to the front of the white film 22. Figure 5 As shown, the back of the white film 22 is printed with a capacitive touch circuit 220, and the touch area 221 of the capacitive touch circuit 220 is painted with conductive ink. The insulating film 23 is attached to the back of the white film 22, and the insulating film 23 is opposite to the light-emitting surface of the LED light-emitting component 1;

[0034] The white film 22 is provided with a terminal, the capacitive touch circuit 220 is electrically connected to the terminal, and the terminal is electrically connected to the LED light-emitting component 1.

[0035] It should be noted that the dark film 20 can be brown, and the white film 22 can be milky white; the material of the dark film 20, the transparent film 21, the white film 22 and the insulating film 23 can be any one of PET soft film, PC soft film, and PMMA; the printing process of the capacitive touch circuit is screen printing silver paste. In order to improve the integration of the dark film 20, frosted lines can be formed on the front and / or back of the dark film. In contrast, the surface of the transparent film 21 is smooth; in addition, the conductive ink is transparent conductive ink, and the insulating film 23 is a transparent insulating film. Combined Figure 5 As shown, the terminal of the capacitive touch circuit 220 is an FPC terminal 222 , and a reinforcement sheet may be provided inside the FPC terminal 222 .

[0036] Specifically, the front of the white film 22 is printed with a second light-shielding layer, the second light-shielding layer avoids the first pattern, the front of the white film 22 is printed with a second pattern, the second light-shielding layer avoids the second pattern, and the second pattern avoids the first pattern. The purpose of setting the first pattern and the second pattern on different films is to display different pattern types in different areas, such as: combining Figure 4 As shown, the first pattern is a color image (landscape), and the second pattern is a single-color or multi-color graphic (text, numbers, symbols, etc.), achieving a clearer lighting display effect. At the same time, it is difficult for the user to observe the specific outline and color of the second pattern through the dark film 20. In addition, the first and second light-shielding layers are black printed layers.

[0037] It should be noted that the printing process of the first pattern can be any one or a combination of screen printing, color printing, and UV inkjet printing, and the printing process is selected according to the actual pattern.

[0038] Combine Figure 2 As shown, it also includes: a buffer foam 24, which is arranged between the insulating film 23 and the light-emitting surface of the LED light-emitting component 1, and the buffer foam 24 is formed with an avoidance groove 240 with an avoidance pattern, and the buffer foam 24 is black.

[0039] Through the structure and color configuration of the film assembly 2 itself, the patterns and contours on the transparent film 21 and the white film 22 are difficult to be directly observed by the user, so that when the LED light is turned off, the user observes the display as a pure color and a whole. Compared with achieving this effect through a glass panel, the structure of the present application can be thinner and more impact-resistant.

[0040] Specifically, combined Figure 3 、 Figures 6-10 As shown, the LED light-emitting assembly 1 includes: a housing 10 and a PCB 11, the PCB 11 is installed in the housing 10, and the PCB 11 is provided with: an LED circuit (conventional LED dot matrix circuit), an LED drive circuit (drive IC), a main control circuit (MCU), a capacitive sensing control circuit (sensing IC) and a capacitive touch control circuit (control IC), which can be conventional circuits in this field, and therefore, their specific composition and connection method are not described here.

[0041] The capacitive touch circuit is electrically connected to the capacitive sensing control circuit and the capacitive touch control circuit; the shell 10 is provided with a light-transmitting groove 100, the spatial position of the light-transmitting groove 100 corresponds to the LED lamp bead of the LED circuit, and the shell 10 is connected to the corresponding bottom shell 12.

[0042] Furthermore, the LED light-emitting assembly has a front lighting or side lighting structure. When the LED light-emitting assembly has a side lighting structure, the housing is provided with a corresponding light guide plate. To ensure the display effect, the LED lamp beads have a light-emitting angle of 120° to 160°, and the edge spacing between adjacent lamp beads is 0.5-8mm.

[0043] When the buffer foam is not installed, the insulating film is tightly connected to the light-emitting surface of the LED light-emitting component, and the light-transmitting groove is sealed. When the buffer foam is installed, the buffer foam is tightly connected to the light-emitting surface of the LED light-emitting component, and the light-transmitting groove is also sealed. The purpose is to ensure that the light path inside the display is in a dark state when the LED is turned off.

[0044] To summarize, pattern lighting display is achieved through the above-mentioned diaphragm assembly and LED light-emitting assembly, wherein the above-mentioned diaphragm assembly is used to realize that the outer side of the front panel, i.e., the dark film, is in a dark solid color state when the LED light is turned off; when the user observes the outside of the display in low light or strong light indoors, it is difficult to observe the pattern outline, pattern color and the color of the non-dark film, so that when the display is not working, the user observes its display surface as a whole; furthermore, when the display is in normal working condition, the LED light can illuminate the pattern normally through the above-mentioned diaphragm assembly, thereby displaying the corresponding outline and color, and the user can also perform touch control according to the corresponding light-emitting pattern.

[0045] The embodiments described above merely represent one or more implementations of the present invention. While their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A capacitive touch LED display, characterized in that: The display comprises: an LED light-emitting component and a diaphragm component, wherein the diaphragm component is fixed to the light-emitting surface of the LED light-emitting component, and the LED light-emitting component is used to illuminate the diaphragm component and perform control; The film assembly includes: a dark film, a transparent film, a white film and an insulating film, the dark film is attached to the front of the transparent film, the back of the transparent film is printed with a first pattern and a first light-shielding layer, the first light-shielding layer avoids the first pattern, the transparent film is attached to the front of the white film, the back of the white film is printed with a capacitive touch circuit, the capacitive touch circuit is coated with conductive ink, the insulating film is attached to the back of the white film, and the insulating film is opposite to the light-emitting surface of the LED light-emitting component; The white film is provided with a terminal, the capacitive touch circuit is electrically connected to the terminal, and the terminal is electrically connected to the LED light-emitting component.

2. The capacitive touch LED display according to claim 1, wherein: The front and / or back of the dark film is formed with frosted textures.

3. The capacitive touch LED display according to claim 1, wherein: A second light-shielding layer is printed on the front surface of the white film, and the second light-shielding layer avoids the first pattern.

4. The capacitive touch LED display according to claim 3, characterized in that: A second pattern is printed on the front surface of the white film, and the second light-shielding layer avoids the second pattern.

5. The capacitive touch LED display according to claim 1, wherein: The conductive ink is a transparent conductive ink, and the insulating film is a transparent insulating film.

6. The capacitive touch LED display according to claim 1, characterized in that: Also includes: The buffer foam is arranged between the insulating film and the light-emitting surface of the LED light-emitting component, and the buffer foam is formed with an avoidance groove with an avoidance pattern.

7. The capacitive touch LED display according to claim 1, characterized in that: The LED light-emitting assembly includes: a housing and a PCB, the PCB is installed in the housing, and the PCB is provided with: an LED circuit, an LED driving circuit, a main control circuit, a capacitive sensing control circuit and a capacitive touch control circuit, and the capacitive touch circuit is electrically connected to the capacitive sensing control circuit and the capacitive touch control circuit; The housing is provided with a light-transmitting groove, and the spatial position of the light-transmitting groove corresponds to the LED lamp bead of the LED circuit.

8. The capacitive touch LED display according to claim 7, characterized in that: The outer shell is connected to a corresponding bottom shell.

9. The capacitive touch LED display according to claim 7, characterized in that: The lighting structure of the LED light-emitting component is front lighting or side lighting. When the LED light-emitting component is a side lighting structure, the housing is provided with a corresponding light guide plate.

10. The capacitive touch LED display according to claim 7, characterized in that: The light emitting angle of the LED lamp beads is 120° to 160°.

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