CN213242354U

CN213242354U - Luminous keyboard backlight assembly and luminous keyboard

Info

Publication number: CN213242354U
Application number: CN202022234565.XU
Authority: CN
Inventors: 杨祖根; 袁雷波
Original assignee: SHENZHEN YEGUANGXUAN ELECTRONIC TECHNOLOGY CO LTD
Current assignee: SHENZHEN YEGUANGXUAN ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-05-18
Anticipated expiration: 2030-10-09

Abstract

The application provides a luminous keyboard backlight assembly and a luminous keyboard. The luminous keyboard backlight component comprises a flexible FPC board, a light guide plate, a shading film and a plurality of LED lamps, wherein the light guide plate is provided with a dot surface and a non-dot surface; the LED lamps are sequentially attached to the lamp attaching surface of the flexible FPC board at intervals, and the dot surface of the light guide plate is attached to the lamp attaching surface of the flexible FPC board; the shading film is provided with a plurality of guide openings, the white surface of the shading film is attached to the non-dot surface of the light guide plate, and the plurality of guide openings are arranged corresponding to the plurality of LED lamps. The light-emitting keyboard backlight component and the light-emitting keyboard provided by the application have the advantages of small accumulated assembly deviation, high assembly efficiency, low power consumption, high brightness and good brightness uniformity.

Description

Luminous keyboard backlight assembly and luminous keyboard

Technical Field

The application belongs to the technical field of backlight devices, and particularly relates to a light-emitting keyboard backlight assembly and a light-emitting keyboard.

Background

In the prior art, a backlight light source of a light-emitting keyboard is generally a side-emitting LED light source. Based on the LED light source of the side-emitting light, the corresponding existing backlight assembly has the manufacturing method that: independently manufacturing a white reflector plate; manufacturing a light guide plate independently, and manufacturing light guide points on the light guide plate; independently manufacturing a shading film; independently manufacturing a plurality of FPC strips and respectively mounting resistors and LEDs; attaching the manufactured light guide plate to the upper side of the white reflector plate, then attaching the light shielding film to the emitting sheet, finally assembling the FPC strip attached with the LEDs to the position of the opening lamp port below the reflector plate, and lighting the FPC for testing after the FPC is assembled.

The LED light source adopting side light emitting and the backlight assembly manufactured based on the light source have the following technical defects:

1. the backlight assembly has a large number of components and complicated assembly procedures, so that the accumulated assembly deviation is large and the assembly efficiency is low;

and 2, the resistors and the LEDs are pasted on the FPC strip, so that the resistors are required to be considered in the circuit design of the backlight assembly and are manufactured into specific circuits including the resistors so as to meet the use requirement, and under the commonly used voltage of 5V, the current and the power of the circuits including the resistors are large, so that the power consumption is large.

3. Due to the fact that the plurality of FPC strips and the LED light sources emitting light from the side faces are adopted, the overall backlight brightness is low, the uniformity of the backlight visual brightness of the keyboard is poor, and if the structure has large square holes or round holes, the heterogeneous structures can block the light sources from spreading easily, and the brightness and the uniformity cannot meet the requirements.

In summary, the conventional light-emitting keyboard has the technical problems of large assembly accumulated deviation, low efficiency, large power consumption, low brightness, poor brightness uniformity and the like.

Disclosure of Invention

An object of the embodiments of the present application is to provide a backlight assembly for a light-emitting keyboard, so as to solve the technical problems of large accumulated assembly deviation, low efficiency, large power consumption, low brightness and poor brightness uniformity of the backlight assembly for a light-emitting keyboard in the prior art.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: a light-emitting keyboard backlight assembly is provided, which includes a flexible FPC board, a light guide plate having a dot surface and a non-dot surface, a light shielding film having a white surface, and a plurality of LED lamps; wherein

The LED lamps are sequentially attached to the light attaching surface of the flexible FPC board at intervals, and the dot surface of the light guide plate is attached to the light attaching surface of the flexible FPC board; the shading film is provided with a plurality of guide openings, the white surface of the shading film is attached to the non-dot surface of the light guide plate, and the plurality of guide openings are arranged corresponding to the plurality of LED lamps.

In one embodiment, the LED lamp is a front emission type LED lamp.

In one embodiment, the LED lamp is in the form of a sheet.

In one embodiment, the mesh surface of the light guide plate and the light attaching surface of the flexible FPC board are fixedly adhered.

In one embodiment, the light guide plate is a sheet of polycarbonate material.

In one embodiment, the flexible FPC board is provided with a plurality of mounting holes for mounting keys, and the plurality of mounting holes are sequentially arranged at intervals along the length direction of the flexible FPC board to form a mounting hole group;

the LED lamps are sequentially arranged at intervals along the length direction of the flexible FPC board to form an LED lamp group, and the mounting hole group and the LED lamp group are arranged at intervals along the width direction of the flexible FPC board.

In one embodiment, the number of the mounting hole groups and the number of the LED lamp groups are a plurality, and the mounting hole groups and the LED lamp groups are alternately arranged along the width direction of the flexible FPC board.

In one embodiment, a plurality of the LED lamp arrays are arranged on the flexible FPC board, the arrays being the same as the key arrays of the light emitting keyboard.

In one embodiment, the lead-in opening is a square opening.

Compared with the prior art, the luminous keyboard backlight assembly that this application provided has:

1. the backlight assembly of the luminous keyboard adopts the flexible FPC board with a certain extension area to replace a plurality of FPC strips in the prior art, and a plurality of LED lamps are pasted on the lamp pasting surface of the backlight assembly, so that the backlight assembly only uses the flexible FPC board, the light guide plate and the shading film, the structure of the backlight assembly is simplified, the number of components of the backlight assembly is small, the assembly process is simplified and speeded, the accumulated assembly deviation is very small, and the assembly efficiency is improved;

2. the luminous keyboard backlight assembly removes a resistor in the existing backlight assembly, the circuit design of the backlight assembly does not need to consider the resistor, LED lamps in the backlight assembly can be connected in parallel in pairs, and due to the change of the circuit connection mode, the changed circuit has small current and power under the commonly used voltage of 5V, so that the power consumption is low;

3. the utility model provides a luminous keyboard subassembly in a poor light adopts the flexible FPC board that has certain extension area, and the face of FPC board levels and is a whole, and the vision luminance homogeneity of consequently obtaining is preferred and luminance is higher, even great square hole or round hole appear in the structure, these different in nature structures can not block the light source and propagate yet.

It is another object of the present application to provide a light-emitting keyboard comprising a plurality of keys, further comprising a light-emitting keyboard backlight assembly as described above; wherein

A plurality of LED lamps in the light-emitting keyboard backlight component are arranged corresponding to the plurality of keys.

The beneficial effect that the luminous keyboard that this application provided compares in prior art is the same as the luminous keyboard backlight unit that this application provided compares in prior art's beneficial effect, and this is no longer repeated here.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic view of a flexible FPC board to which an LED lamp is attached according to an embodiment of the present application;

FIG. 2 is a schematic view of a release film coated with 3M hydrogel provided in an embodiment of the present application;

fig. 3 is a schematic view of a light shielding film according to an embodiment of the present disclosure;

fig. 4 is a schematic view of a light guide plate according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a component of a first step of a method for manufacturing a backlight assembly of a light-emitting keyboard according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a component in a second step of the method for manufacturing a backlight component of a light-emitting keyboard according to the embodiment of the present application;

FIG. 7 is a schematic diagram illustrating a third step of a method for fabricating a backlight assembly of a light-emitting keyboard according to an embodiment of the present application;

fig. 8 is a schematic assembly diagram of a fourth step of the method for manufacturing a light-emitting keyboard backlight assembly according to the embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

10-flexible FPC board; 20-an LED lamp; 30-a release film; 40-a light guide plate; 50-a light-shielding film; 101-mounting holes; 501-guide port.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The light-emitting keyboard backlight assembly and the light-emitting keyboard provided by the embodiment of the application are now described.

Referring to fig. 1 to 8, the light-emitting keyboard backlight assembly provided by the present application includes a flexible FPC board 10, a light guide plate 40, a light shielding film 50, and a plurality of LED lamps 20; the LED lamps 20 are sequentially attached to the light attaching surface of the flexible FPC board 10 at intervals, and the dot surface of the light guide plate 40 is attached to the light attaching surface of the flexible FPC board 10; the light shielding film 50 has a plurality of guide openings 501, the white surface of the light shielding film 50 is attached to the non-dot surface of the light guide plate 40, and the plurality of guide openings 501 are disposed corresponding to the plurality of LED lamps 20.

Compared with the prior art, the light-emitting keyboard backlight assembly in the embodiment has the beneficial effects that:

In this embodiment, the front and back surfaces of the light shielding film 50 are a white surface and a black surface, respectively, wherein the white surface of the light shielding film 50 is attached to the non-dot surface of the light guide plate 40, and the black surface of the light shielding film 50 faces the side where the keys are disposed.

In one embodiment, the LED lamp 20 is preferably a front-emission type LED lamp, and the front-emission type LED lamp is used to replace the side-emission type LED lamp in the prior art, and the arrangement of the FPC board is combined to optimize the brightness and uniformity of the backlight assembly.

In this embodiment, the LED lamp 20 is preferably a sheet-shaped micro LED lamp, which further simplifies the structure of the backlight assembly and facilitates the adhesion of the sheet-shaped lamp structure.

In one embodiment, the dot surface of the light guide plate 40 is attached to the light attaching surface of the flexible FPC board 10 by 3M glue. Alternatively, the light guide plate 40 is a PC material plate, i.e., a polycarbonate material plate.

In one embodiment, the flexible FPC board 101 and the light guide plate 40 are respectively provided with a plurality of mounting holes 404 for mounting the keys, the plurality of mounting holes 404 and the plurality of LED lamps 20 are staggered, and the mounting holes 101 on the flexible FPC board 10 and the light guide plate 40 are arranged in a one-to-one correspondence. The LED lamps 20 are attached to the lamp attachment surface of the flexible FPC board 10 in a manner that keys of the light-emitting keyboard are arranged. Specifically, the plurality of mounting holes 101 are sequentially arranged at intervals along the length direction of the flexible FPC board 10 to form a mounting hole group; the plurality of LED lamps 20 are sequentially arranged at intervals in the longitudinal direction of the flexible FPC board 10 to form an LED lamp group, and the mounting hole group and the LED lamp group are provided at intervals in the width direction of the flexible FPC board 10. The mounting hole groups and the LED lamp groups are a plurality of, and the mounting hole groups and the LED lamp groups are alternately arranged along the width direction of the flexible FPC board 10.

As shown in fig. 5 to 8, the method for manufacturing the light-emitting keyboard backlight assembly provided by the present application is as follows:

the first step is as follows: placing the flexible FPC board 10 with the micro LED lamps 20 in the positioning jig, and enabling the lamp-attaching surface to face upwards, as shown in FIG. 5;

the second step is that: sticking the release film 30 brushed with the 3M water adhesive on the light sticking surface of the flexible FPC board 10 through a positioning jig, and tearing off the release film 30 to make the water adhesive transfer and stick to the flexible FPC board 10, as shown in FIG. 6;

the third step: adhering the prepared dot surface of the light guide plate 40 to the light adhering surface of the flexible FPC board 10 through a positioning jig, so that the light guide plate 40 and the flexible FPC board 10 are adhered through 3M glue, as shown in FIG. 7;

the fourth step: the white surface of the light shielding film 50 is attached to the non-mesh surface of the light guide plate 40 by a positioning fixture, as shown in fig. 8, so that the guide opening 501 on the light shielding film corresponds to the LED lamp 20;

the fifth step: and pressing the assembled backlight assembly by using a jig to fully bond the 3M glue on the periphery.

It is another object of the present application to provide a light-emitting keyboard comprising a plurality of keys, further comprising a light-emitting keyboard backlight assembly as described above; and a plurality of LED lamps in the light-emitting keyboard backlight component are arranged corresponding to the plurality of keys.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A light-emitting keyboard backlight assembly, comprising: the LED display device comprises a flexible FPC board, a light guide plate with a mesh point surface and a non-mesh point surface, a shading film with a white surface and a plurality of LED lamps; wherein

2. The illuminated keyboard backlight assembly of claim 1, wherein: the LED lamp is a front-side light-emitting LED lamp.

3. The light-emitting keyboard backlight assembly of claim 1 or 2, wherein: the LED lamp is sheet-shaped.

4. The illuminated keyboard backlight assembly of claim 1, wherein: and the mesh point surface of the light guide plate and the light sticking surface of the flexible FPC board are stuck and fixed.

5. The light-emitting keyboard backlight assembly of claim 1 or 4, wherein: the light guide plate is a polycarbonate material plate.

6. The illuminated keyboard backlight assembly of claim 1, wherein: the flexible FPC board is provided with a plurality of mounting holes for mounting keys, and the mounting holes are sequentially arranged at intervals along the length direction of the flexible FPC board to form a mounting hole group;

7. The illuminated keyboard backlight assembly of claim 6, wherein: the mounting hole group and the LED lamp group are a plurality of, and the mounting hole group and the LED lamp group are arranged along the width direction of the flexible FPC board in an alternating mode.

8. The illuminated keyboard backlight assembly of claim 1, wherein: the LED lamp arrays are arranged on the flexible FPC board, and the arrays are the same as the key arrays of the light-emitting keyboard.

9. The illuminated keyboard backlight assembly of claim 1, wherein: the guide opening is a square opening.

10. A light-emitting keyboard comprising a plurality of keys, characterized in that: further comprising the luminescent keyboard backlight assembly of any one of claims 1-9; wherein