TWI606172B - Backlighting for electronic lock - Google Patents

Description

Backlight display structure of electronic lock

The present invention relates to a structure for causing an electronic lock display panel to emit light, and more particularly to a backlight display structure having high luminous efficiency and an electronic lock in which each graphic can emit different colors.

In the prior art, the conventional backlight display structure is provided with a printed circuit board 50, and a laterally-emitting light-emitting diode 51 is disposed on one side of the printed circuit board 50. A light guide plate 52 is disposed on the corresponding light emitting diode 51 of the circuit board 50. A reflective layer 53 is disposed on the bottom surface of the light guide plate 52, and a light transmissive outer layer 54 is disposed on the surface of the outer layer 54 on the light emitting diode 51. A printed layer 55 is provided, and a plurality of patterns 551 are formed on the printed layer 55.

When the above-mentioned conventional backlight display structure is used, light emitted laterally from the light-emitting diode 51 passes through the air and enters the light guide plate 52, and is emitted upward through the reflection of the light guide plate 52 or the reflection layer 53, so that the efficiency of light emission Low and relatively power hungry. When the light guide plate 52 is used, it is necessary to match the reflective layer 53 to make the upwardly illuminating light uniform. If the reflective layer 53 is absent, the light emitted from the light guide plate 52 is difficult to be uniform. Moreover, since the light source of the same light-emitting diode 51 is guided to the printed layer 55, all the patterns 551 are simultaneously or not illuminated, so that the individual patterns 551 cannot be illuminated or the individual patterns 551 cannot be changed. Color When the conventional backlight display structure is applied to the display structure of the electronic lock, the state of the different electronic lock functions cannot be displayed in the light or dark of the different patterns 551.

The conventional backlight display structure shown in FIG. 5 is provided with a printed circuit board 60. A plurality of light emitting diodes 61 are combined on the printed circuit board 60, and a spacer layer 62 is disposed on the printed circuit board 60. The gratings 62 are separated from each of the LEDs 61, and a grating 63 is supported on the spacer layer 62. The grating 63 forms an opening 631 corresponding to each of the LEDs 61, and a transparent outer layer 64 is disposed on the grating 63. The surface of the outer layer 64 of light is provided with a printed layer 65, and a pattern 651 is formed on the printed layer 65 corresponding to the position of each opening 631.

In the above-mentioned conventional backlight display structure, since the height of the printed layer 65 needs to be pulled up, the light of the light-emitting diode 61 can be spread to a sufficient extent to illuminate the entire pattern 651, but the overall thickness is required to be high. Up to 8-10 mm, and the light-emitting diode 61 is used to illuminate the pattern 651, the light is weakened, and in addition to the power consumption, when the conventional backlight display structure is applied to the electronic lock, the electronic lock is also applied. The thickness is thicker and cannot be thinned.

Because existing backlight display structures each have the disadvantage of being thicker, more power consuming, or unable to illuminate individual patterns or emit different colors. Therefore, the present invention solves the problem that the above-described conventional backlight display structure is used in an electronic lock display pattern by using a structure of a diffusion sheet and an in-cell type light-emitting diode.

To achieve the above object, the present invention provides a backlight display structure of an electronic lock, comprising:

a printed circuit board on which more than one plate hole is bored;

One or more light emitting diodes, each of the light emitting diodes is respectively disposed in each of the plate holes, and each of the light emitting diodes is provided with a die encapsulating portion at the top, and each of the die encapsulating portions is at least partially located in each of the plate holes;

a diffusion sheet covering the printed circuit board, and a bottom surface of the diffusion sheet is in contact with a top surface of the die package portion of each of the light emitting diodes;

An outer layer is disposed on the diffusion sheet, and a printed layer is formed on the surface of the outer layer, and one or more patterns are formed on the printed layer, and each of the patterns corresponds to one or more light emitting diodes.

Further, each of the light emitting diodes of the present invention is provided with a substrate, and the periphery of the top surface of each substrate abuts against the periphery of the bottom end of each of the plate holes, and the die package portion is disposed in the middle of the top surface of each substrate in each of the crystal grains A die is disposed in the package portion, and two electrodes respectively electrically connected to the respective die are disposed on each of the substrates, and the two electrodes are electrically connected to the printed circuit board.

Preferably, the top surface of each of the light-emitting diodes of the present invention is in contact with the bottom surface of the diffusion sheet.

Further, the present invention is provided with a spacer layer between the circuit board and the diffusion sheet, and the spacer layer is a plurality of support strips, a holed plastic sheet or a plurality of particles, and the spacer layer will The diffusion sheet is topped, and the distance between the diffusion plate and each of the light-emitting diodes and the range in which the light-emitting diodes scatter the light through the diffusion plate are adjusted.

When the invention is used, it is installed in an electronic lock, and the functions corresponding to different electronic locks display various corresponding patterns, and each of the light-emitting diodes emits upward into the diffusion sheet, and the point light source is diffused into a surface light source through the diffusion sheet, and then irradiated onto the printed layer. For each graph, when the area of the graph is larger and a larger range of light sources is required, the range of light rays that illuminate the same pattern can be increased by increasing the number of light-emitting diodes that illuminate the same pattern.

Since each graphic corresponds to a different light-emitting diode, the present invention can make each graphic bright or non-lighting in a selective manner, and can also make different light-emitting diodes emit light of different colors by using different light-emitting diodes. Change the color of different graphics to be lit, with the brightness or color of the graphic indicating that different functions of the electronic lock are activated or turned off. Compared with the prior art of the grating, the diffusion sheet and the printing layer of the present invention have a short distance from each of the light-emitting diodes, so that the light-emitting diodes emit low light loss and high illumination efficiency, and are more energy-efficient to use. Compared with the prior art of the light guide plate, the optical design of the present invention is simpler, and the thickness of the diffusion sheet is thinner and the layered structure is less. Therefore, the thickness of the integrated electronic package is thinner and does not occupy space. The electronic lock is made in a thinner form for the convenience of the user.

The invention further provides a spacer between the circuit board and the diffusion sheet, and the distance between the diffusion plate and each of the light-emitting diodes can be easily adjusted by changing the spacing layer design of different heights to change the transmission of each of the light-emitting diodes. The diffuser illuminates the range of light illuminating to accommodate patterns with differently sized contours.

In order to understand the technical features and practical effects of the present invention in detail, it can be implemented in accordance with the contents of the specification, and further described in detail with reference to the preferred embodiments shown in the drawings.

As shown in FIG. 1 and FIG. 2, the present invention is a backlight display structure of an electronic lock, comprising a printed circuit board 10, and more than one light emitting diode 20 coupled to the printed circuit board 10. a diffusion sheet 30 on the printed circuit board 10, and an outer layer 40 disposed on the diffusion sheet 30, wherein:

One or more plate holes 11 are bored in the printed circuit board 10, and one or more plate holes 11 are disposed in a group in the same area of the printed circuit board 10, and each group includes more than one plate holes 11, such as In the preferred embodiment shown in Fig. 1, the plate holes 11 may be provided separately or in groups of two.

Each of the light-emitting diodes 20 is disposed in each of the plate holes 11 , and each of the light-emitting diodes 20 is provided with a substrate 21 . The periphery of the top surface of each of the substrates 21 abuts against the periphery of the bottom end of each of the plate holes 11 on the top surface of each substrate 21 . A die package portion 22 is disposed in the middle, and a die 221 is disposed in each die package portion 22, and two electrodes 23 respectively electrically connected to the respective die 221 are disposed on each substrate 21, and the two electrodes 23 and the printed circuit are disposed. The board 10 is electrically connected; as in the preferred embodiment, the top surface of the die package 22 of each of the LEDs 20 is higher than the top surface of the printed circuit board 10 such that at least a portion of the die package 22 is located Inside the plate hole 11.

The diffusion sheet 30 is covered on the printed circuit board 10. As shown in the preferred embodiment, the bottom surface of the diffusion sheet 30 is in contact with the top surface of the die package portion 22 of each of the LEDs 20, so that the LEDs 20 are emitted. The light can directly enter the diffuser 30 to diverge.

The outer layer 40 is a light transmissive plastic sheet or glass and has a top surface and a bottom surface. In the preferred embodiment, a printed layer 41 is printed on the bottom surface of the outer layer 40. The number of the printed layers 41 is one or more patterns 411 formed on the printed layer 41, and each of the patterns 411 is located at one or more, that is, a range in which the light-emitting diodes 20 of each group are irradiated upward through the diffusion sheet 30, as shown in FIG. In the preferred embodiment, one of the patterns 411 is located in a range in which one of the light-emitting diodes 20 is irradiated upward through the diffusion sheet 30, and the other pattern 411 is located in a range in which the two light-emitting diodes 20 are irradiated upward through the diffusion sheet 30.

When the invention is used, it is mounted on an electronic lock, and each group of LEDs 20 emits light upward into the diffusion sheet 30 to diffuse the point source into a pattern 411 on the printing layer 41. When the area of the pattern 411 is larger, it needs to be compared. In the case of a wide range of light sources, the area of each of the groups of light-emitting diodes 20 that diffusely illuminate the respective patterns 411 through the diffusion sheet 30 can be increased by increasing the number of the light-emitting diodes 20 included in each of the groups of the light-emitting diodes 20. Since each of the patterns 411 corresponds to a different group of the LEDs 20, the present invention can also set different groups of LEDs 20 in addition to being able to illuminate or illuminate a particular pattern 411 in a selective manner. In order to emit different colors of light, the color of the different graphics 411 is changed, and the function of displaying the electronic lock is activated or turned off by the difference of the brightness and color of the different graphics 411.

In addition, in the preferred embodiment of the present invention, the die package portion 22 of each of the light-emitting diodes 20 has a shape in which the top surface of each of the light-emitting diodes 20 is protruded from each of the plate holes 11, and the die package portion 22 of each of the light-emitting diodes 20 is provided. The top surface of the printed circuit board 10 can also be disposed at or below the top surface of the printed circuit board 10, and the diffusion sheet 30 can cover the top surface of the printed circuit board 10. Since the diffusion sheet 30 is close to each of the light-emitting diodes 20, the brightness of the patterns 411 can be effectively illuminated without being too high, so that the power saving effect can be achieved, and the configuration of the present invention can be realized without the need of a grating. The optical design is simplified to make the thickness of the overall invention thinner, and the electronic lock of the present invention can be designed in a thinner form.

When the present invention is required to expand the illumination range of each group of the light-emitting diodes 20 through the diffusion sheet 30, in addition to the number of the light-emitting diodes 20 of each group of the light-emitting diodes 20, in addition to the first preferred embodiment described above. As shown in FIG. 3, in the second preferred embodiment of the present invention, a spacer layer 45 is connected to the bottom surface of the diffusion sheet 30 and the top surface of the printed circuit board 10. The spacer layer 45 is a plurality of supports. The support strip 451 of the diffusion sheet 30, in addition to the plurality of support strips 451, the spacer layer 451 may also be a punched plastic sheet (the light emitted by each of the light-emitting diodes 20 passes through the hole of the plastic sheet) or The plurality of particles are topped by the spacer layer 45, and the distance between the diffusion sheet 30 and each of the light-emitting diodes 20 is adjusted so that each group of the light-emitting diodes 20 illuminates the range of the diffusion sheet 30. The expansion is performed to a different extent, and the light diffused through the diffusion sheet 30 can be adjusted to a degree of blooming, and the range in which the respective patterns 411 are irradiated can be enlarged. Since the rest of the configuration and the functions of the second preferred embodiment are the same as those of the first preferred embodiment, the present invention is not described herein.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the claims of the present invention, and other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the present invention. Within the scope of the patent application.

10‧‧‧Printed circuit board

11‧‧‧ board holes

20‧‧‧Lighting diode

21‧‧‧Substrate

22‧‧‧Grade Packaging Department

221‧‧ ‧ grain

23‧‧‧Electrode

30‧‧‧Diffuser

40‧‧‧ outer layer

41‧‧‧Printing layer

411‧‧‧ graphics

45‧‧‧ spacer

451‧‧‧Support bars

50‧‧‧Printed circuit board

51‧‧‧Lighting diode

52‧‧‧Light guide plate

53‧‧‧reflective layer

54‧‧‧ outer layer

55‧‧‧Printing layer

551‧‧‧ graphics

60‧‧‧Printed circuit board

61‧‧‧Lighting diode

62‧‧‧ spacer

63‧‧‧Raster

631‧‧‧ openings

64‧‧‧ outer layer

65‧‧‧Printing layer

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view showing a first preferred embodiment of the present invention. Figure 2 is a plan view of a first preferred embodiment of the present invention. Figure 3 is a cross-sectional view showing a second preferred embodiment of the present invention. 4 is a schematic cross-sectional view showing a conventional backlight display structure. Fig. 5 is a schematic cross-sectional view showing another conventional backlight display structure.

10‧‧‧Printed circuit board

11‧‧‧ plate hole

20‧‧‧Lighting diode

21‧‧‧Substrate

22‧‧‧Grade Packaging Department

221‧‧ ‧ grain

23‧‧‧Electrode

30‧‧‧Diffuser

40‧‧‧ outer layer

41‧‧‧Printing layer

411‧‧‧ graphics

Claims (2)

A backlight display structure of an electronic lock comprises: a printed circuit board on which one or more plate holes are bored; one or more light emitting diodes, each of which is respectively disposed in each plate hole, and each of the light emitting The diode body is provided with a substrate, and the periphery of the top surface of each substrate abuts against the periphery of the bottom end of each of the plate holes, and each of the light emitting diodes is provided with a die package portion at the top, and each of the die package portions is disposed in the middle of the top surface of each substrate Each of the die package portions is at least partially located in each of the plate holes, and a die is disposed in each of the die package portions, and two electrodes respectively electrically connected to the respective die are disposed on each of the substrates, and the two electrodes are electrically connected to the printed circuit board a diffusion sheet covering the printed circuit board; and an outer layer disposed on the diffusion sheet, forming a printed layer on the surface of the outer layer, forming more than one pattern on the printed layer, each The patterns are respectively located in the illumination range through which the one or more light emitting diodes pass through the diffusion sheet. The backlight display structure of the electronic lock of claim 1, wherein a spacer layer is disposed between the circuit board and the diffusion sheet, and the spacer layer is a plurality of support strips, a plastic sheet for punching holes or a plurality of The particles are topped by the spacer layer, and the distance between the diffusion plate and each of the light-emitting diodes and the range in which the light-emitting diodes scatter the light through the diffusion plate are adjusted.