Digital display device

Abstract

The utility model relates to the field of display devices, in particular to a digital display device. The utility model discloses a digital display device which comprises a light source, a circuit board, a light guide layer, a light scattering layer and a reflection area, the light source is arranged on the front surface of the circuit board, the light guide layer is provided with a front-back through light guide cavity, the light guide layer is stacked on the front surface of the circuit board, the light source is located in the light guide cavity, and the light emitting direction of the light source faces forwards. The reflection area is arranged at the opening in the front end of the light guide cavity and used for reflecting light emitted by the light source to the cavity wall of the light guide cavity to enter the light guide layer, the light diffusion layer is stacked on the front surface of the light guide layer, and display patterns are arranged on the front surface of the light diffusion layer. The utility model has the advantages of light weight and good structural stability; the number of light sources can be reduced while large-area display is realized, so that the cost is reduced; light source position limitation is small, and design and manufacturing are easy.

Description

Technical Field

[0001] The utility model belongs to the field of display devices, and in particular relates to a digital display device. Background Art

[0002] A digital display is a device that displays numbers and functions. It is widely used in household appliances and instruments such as air conditioners, washing machines, water heaters, refrigerators and induction cookers to display operating status.

[0003] In the existing digital display, the light source is arranged in the light-emitting cavity behind the display area. The light from the light source directly illuminates the display area after passing through the light-emitting cavity. It is necessary to customize the light-emitting cavity of the corresponding size according to the size of the graphics. The larger the display area, the more light sources are required for display, which is costly. In addition, a larger light-emitting cavity stroke is required to make the light uniform. The reflective cover needs to have sufficient thickness. At the same time, in order to prevent the display panel from collapsing and being uneven, the display panel also needs to be thicker, making the entire device appear heavy. Summary of the invention

[0004] The purpose of the utility model is to provide a digital display device to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a digital display device, including a light source, a circuit board, a light guide layer, a light scattering layer and a reflection area, the light source is arranged on the front surface of the circuit board, the light guide layer is provided with a light guide cavity that passes through from front to back, the light guide layer is stacked on the front surface of the circuit board, the light source is located in the light guide cavity and the light output direction is arranged forward, the reflection area is arranged at the front end opening of the light guide cavity, and is used to reflect the light emitted by the light source to the cavity wall of the light guide cavity and enter the light guide layer, the light scattering layer is stacked on the front surface of the light guide layer, and the front surface of the light scattering layer is provided with a display pattern.

[0006] Furthermore, it also includes a light-transmitting layer, which is arranged between the light-guiding layer and the light-scattering layer, and the reflective area is formed on the rear surface of the light-transmitting layer.

[0007] Furthermore, the reflective area is made of reflective ink.

[0008] Furthermore, the size of the light guiding cavity gradually increases from the back to the front.

[0009] Furthermore, the cross-section of the light-guiding cavity is circular.

[0010] Furthermore, the thickness of the light scattering layer is 0.125-1.000 mm.

[0011] Furthermore, the light-scattering layer is a PET diffusion film.

[0012] Furthermore, the thickness of the light guide layer is 0.500-2.000 mm.

[0013] Furthermore, a roughening layer is provided between the light guide layer and the circuit board.

[0014] Furthermore, the circuit board is a flexible circuit board.

[0015] Beneficial technical effects of the utility model:

[0016] The utility model is light and thin, and has good structural stability; it can reduce the number of light sources while realizing a larger area display, thereby reducing costs; it has few restrictions on the position of the light source and is easy to design and manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0019] Figure 2 It is an exploded view of a specific embodiment of the utility model;

[0020] Figure 3 It is a cross-sectional view of a specific embodiment of the utility model. DETAILED DESCRIPTION

[0021] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1-3 As shown, a digital display device includes a light source 1, a circuit board 2, a light guide layer 3, a light-transmitting layer 4, a light-scattering layer 5 and a reflective area 6. The light source 1 is arranged on the front surface of the circuit board 2 (i.e. Figure 2On the upper surface in the middle), the light source 1 is preferably a large-angle LED light source, such as an LED chip or a Chip-packaged LED, which has the advantages of high efficiency and energy saving, long life, green environmental protection, and small size, but is not limited to this. In some embodiments, the light source 1 can also use other light sources, such as an OLED light source.

[0024] In this specific embodiment, the height of the light source 1 along the front-to-back direction is 0.200-0.800 mm, so that the digital display device is thinner.

[0025] The circuit board 2 is a flexible circuit board, and the thickness of the circuit board 2 is 0.200-0.800 mm, preferably 0.200 mm, so that the digital display device is thinner, but not limited to this. In some embodiments, the circuit board 2 can also be implemented by a PCB circuit board.

[0026] The light guide layer 3 is provided with a light guide cavity 31 that passes through from front to back. The cavity wall of the light guide cavity 31 is the light entrance surface of the light guide layer 3, and the front surface of the light guide layer 3 is the light exit surface. The light guide layer 3 is stacked on the front surface of the circuit board 2. The light source 1 is located in the light guide cavity 31 and the light exit direction is set forward. The reflection area 6 is set at the front opening of the light guide cavity 31, which is used to reflect the light emitted by the light source 1 to the cavity wall of the light guide cavity 31 and enter the light guide layer 3 and then exit from the front surface of the light guide cavity 31. By setting the light guide layer 3, the light exit is uniform and a large light cavity stroke is not required, so that the digital display device can be thinned, and the number of light sources 1 can be reduced, thereby reducing the cost. In addition, the light guide cavity 31 can be made smaller, and even if the area for displaying the pattern is larger, it will not affect the stability of the overall structure.

[0027] In this specific embodiment, the light guide layer 3 is made of PC (polycarbonate) material, which has good light guiding performance, is easy to implement and has low cost, but is not limited to this. In some embodiments, the light guide layer 3 can also be made of other existing light guiding materials.

[0028] In this specific embodiment, the thickness of the light guide layer 3 is 0.500-2.000 mm, preferably 1.000 mm, so that the digital display device is thinner and the light output of the light guide layer 3 is uniform.

[0029] Preferably, in this specific embodiment, the size of the light guide cavity 31 gradually increases from back to front, so that the cavity wall of the light guide cavity 31 is inclined, which is conducive to more light reflected by the reflection area 6 entering the light guide layer 3 from the cavity wall of the light guide cavity 31.

[0030] In this specific embodiment, the cross-section of the light guide cavity 31 is circular, that is, the light guide cavity 31 is a conical structure, which has a simple structure, is easy to manufacture, and allows for more uniform light input, but is not limited thereto. In some embodiments, the cross-section of the light guide cavity 31 may also be a square or other structure.

[0031] Preferably, a roughening layer is disposed on the rear surface of the light guide layer 3, and the light is fully scattered and uniformly emitted from the front surface of the light guide layer 3, so that the emitted light is more uniform.

[0032] The light-transmitting layer 4 is stacked on the front surface of the light-guiding layer 3, the reflective area 6 is formed on the rear surface of the light-transmitting layer 4, and the light-scattering layer 5 is stacked on the front surface of the light-transmitting layer 4. The front surface of the light-scattering layer 5 is provided with a display pattern (not shown in the figure). The display pattern can be text, graphics, etc. The light scattered by the light-scattering layer 5 is partially emitted to the front surface of the reflective area 6 for reflection and then scattered by the light-scattering layer 5 before being emitted to the display pattern, thereby avoiding the formation of a dark area or an uneven effect of a point light source at the position of the display pattern corresponding to the reflective area 6, so that the position of the light source 1 is less restricted and the design is more free and simple.

[0033] In this embodiment, the reflective area 6 is formed on the rear surface of the light-transmitting layer 4 , which has a simple structure and is easy to process, but is not limited to this. In some embodiments, the light-transmitting layer 4 may not be provided, and the reflective area 6 is formed on the rear surface of the light-scattering layer 5 .

[0034] In this specific embodiment, the light-transmitting layer 4 can be realized by a light-transmitting film, and the reflective area 6 is composed of reflective ink and printed on the rear surface of the light-transmitting layer 4. It has a simple structure, is easy to implement, and has low cost, but is not limited to this. In some embodiments, the reflective area 6 can also be made of other existing reflective materials, such as silver coating.

[0035] Preferably, in this embodiment, the front surface of the reflective area 6 is a scattering surface, which facilitates light diffusion and avoids the formation of a dark area or an uneven effect of a point light source at a position of the display pattern corresponding to the reflective area 6 .

[0036] Preferably, the thickness of the light scattering layer 5 is 0.125-1.000 mm, further ensuring that enough scattered light from the light scattering layer 5 is projected onto the front surface of the reflective area 6 for diffuse reflection, thereby avoiding the formation of a dark area at the position of the display pattern corresponding to the reflective area 6 or the generation of an uneven effect of a point light source.

[0037] In this specific embodiment, the light-scattering layer 5 is a PET (polyethylene terephthalate) diffusion film, which has good scattering effect, is easy to implement, and has low cost, but is not limited to this. In some embodiments, the light-scattering layer 5 can also be made of other light-diffusing materials.

[0038] When the display pattern is to be lit, the light source 1 corresponding to the display pattern is controlled to light up, and the light emitted by the light source 1 is reflected by the reflection area 6 and enters the light guide layer 3 from the cavity wall of the light guide cavity 31, and then exits from the front surface of the light guide layer 3, passes through the light transmitting layer 4 and enters the light scattering layer 5, and then is scattered by the light scattering layer 5 and then exits from the front surface of the light scattering layer 5 to evenly light up the display pattern. At the same time, part of the scattered light of the light scattering layer 5 is projected onto the front surface of the reflection area 6 for diffuse reflection, and then passes through the light scattering layer 5 and exits from the front surface of the light scattering layer 5, thereby avoiding the formation of a dark area or an uneven effect of a point light source at the position of the display pattern corresponding to the reflection area 6.

[0039] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A digital display device, characterized in that: The invention comprises a light source, a circuit board, a light guide layer, a light diffusion layer and a reflection area. The light source is arranged on the front surface of the circuit board. The light guide layer is provided with a light guide cavity which passes through from front to back. The light guide layer is stacked on the front surface of the circuit board. The light source is located in the light guide cavity and the light emitting direction is arranged forward. The reflection area is arranged at the front end opening of the light guide cavity and is used for reflecting the light emitted by the light source to the cavity wall of the light guide cavity and entering the light guide layer. The light diffusion layer is stacked on the front surface of the light guide layer. The front surface of the light diffusion layer is provided with a display pattern.

2. The digital display device according to claim 1, characterized in that: It also includes a light-transmitting layer, which is arranged between the light-guiding layer and the light-scattering layer, and a reflective area is formed on the rear surface of the light-transmitting layer.

3. The digital display device according to claim 2, characterized in that: The reflective area is made of reflective ink.

4. The digital display device according to claim 1, characterized in that: The size of the light guiding cavity increases gradually from the back to the front.

5. The digital display device according to claim 4, characterized in that: The cross section of the light guide cavity is circular.

6. The digital display device according to claim 1, characterized in that: The thickness of the light scattering layer is 0.125-1.000 mm.

7. The digital display device according to claim 6, characterized in that: The light-scattering layer is a PET diffusion film.

8. The digital display device according to claim 1, characterized in that: The thickness of the light guide layer is 0.500-2.000 mm.

9. The digital display device according to claim 1, characterized in that: A roughening layer is provided between the light guide layer and the circuit board.

10. The digital display device according to claim 1, characterized in that: The circuit board is a flexible circuit board.

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