TWM622001U - Colored backlight module for luminous keyboard - Google Patents

Abstract

A colored backlight module for a light-emitting keyboard, comprising: a light guide plate with a light emitting surface; a polyimide light shielding sheet arranged on the light emitting surface of the light guide plate; a dot structure arranged under the light guide plate the surface and/or the upper surface; and a light-emitting member disposed corresponding to the light guide plate, so that the light-emitting member emits light from the light-emitting surface along the light guide plate and the dot structure and penetrates the polyimide light-shielding sheet. The colored backlight module of the luminous keyboard of the present creation can emit yellow-brown colored light without applying any colored ink.

Description

Colored backlight module for luminous keyboard

The present invention relates to a light-emitting keyboard, in particular to a colored backlight module for the light-emitting keyboard.

The illuminated keyboard is a keyboard with a backlight module under the keycap. Generally speaking, a backlight module includes a light guide plate, an LED lamp, and a light shielding sheet above the light guide plate. The light-emitting color of the backlight module is determined by the light-emitting color of the LED. And LEDs have a limited choice of luminous colors, and some specific colors are not available. Another method is to print color on the surface of the transparent light-shielding film to change the color of the light passing through the light-shielding film. However, the color ink has poor weather resistance and is easy to fade. In addition, color inks are difficult to meet flammability standards, making the safety of illuminated keyboards in doubt.

Therefore, the purpose of this creation is to provide a colored backlight module for a light-emitting keyboard, which can emit colored backlights without using colored LEDs or colored inks.

The technical means adopted in this creation to solve the problems of the prior art is to provide a colored backlight module for a light-emitting keyboard, comprising: a light guide plate with a light-emitting surface; a polyimide light-shielding sheet disposed on the light guide plate On the light-emitting surface, the polyimide light-shielding sheet can transmit light; a dot structure is arranged on the lower surface and/or the upper surface of the light guide plate; and a light-emitting member is arranged corresponding to the light guide plate, so that the The light-emitting component emits light from the light-emitting surface along the light-guiding plate and the dot structure and penetrates the polyimide light-shielding sheet.

In an embodiment of the present invention, a colored backlight module of a light-emitting keyboard is provided. The light-shielding sheet has a light-shielding portion that is opaque and a light-transmitting portion that is transparent. The light-transmitting portion allows the light-emitting surface to emit light. of light penetrates.

In an embodiment of the present invention, a colored backlight module for a light-emitting keyboard is provided. The light-shielding portion has two upper and lower layers, the lower layer of the light-shielding portion is a white light-shielding layer, and the upper layer of the light-shielding portion is a black light-shielding layer.

In an embodiment of the present invention, a colored backlight module for a light-emitting keyboard is provided. The polyimide light-shielding sheet has a structure hole, and the light-shielding portion is disposed around the structure hole.

In an embodiment of the present invention, a colored backlight module for a light-emitting keyboard is provided, further comprising a reflector plate disposed under the light guide plate, and a reflecting surface of the reflector plate faces the light guide plate.

Through the technical means adopted by the colored backlight module of the light-emitting keyboard of the present creation, compared with the conventional light-emitting keyboard that is coated with colored ink on the light-shielding sheet, the polyimide light-shielding sheet, which is yellow-brown, makes the light-emitting keyboard of the present creation glow. The colored backlight module of the keyboard can emit yellow/brown colored light without applying any colored ink or disposing colored LEDs. The advantages of polyimide are good fire resistance, good weather resistance, acid and alkali resistance and chemical solvent resistance, the material is very stable, and it will not fade after long-term use. Furthermore, in addition to the good fire-resistance properties of the polyimide light-shielding sheet itself, this creation does not need to apply any color ink to avoid the possibility of the color ink being flammable, so that the colored backlight module of the luminous keyboard of this creation can be used. Complies with flammability standard UL94, and has good safety.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4 . This description is not intended to limit the implementation of the present creation, but is one of the embodiments of the present creation.

As shown in FIG. 1, a colored backlight module 100 of a light-emitting keyboard according to the first embodiment of the present invention includes: a light guide plate 1, a polyimide light-shielding sheet 2, a dot structure 3, and a light-emitting member 4 and a reflector 5.

The light guide plate 1 is permeable to light, and the light can be totally reflected inside the light guide plate 1 . The upper surface of the light guide plate 1 is a light emitting surface 11 .

The polyimide light shielding sheet 2 is disposed on the light emitting surface 11 of the light guide plate 1 . The material of the polyimide light shielding sheet 2 is polyimide (polyimide, PI), which is transparent to light. Since the color of the polyimide light-shielding sheet 2 is yellow as shown in Figures 3 and 4, the color of the light emitted from the light-emitting surface 11 through the light guide plate 1 after penetrating the polyimide light-shielding sheet 2 Also yellow. Of course, the brown polyimide light-shielding sheet 2 can be used according to the needs of use, so that the colored backlight module 100 of the light-emitting keyboard of the present invention can emit brown colored light.

Therefore, the colored backlight module 100 of the light-emitting keyboard of the present invention can emit yellow/brown colored light without applying any colored ink. In addition, the polyimide light-shielding sheet 2 itself has good fire-resistance properties, and the present invention does not need to apply any color ink to avoid the possibility of the color ink being flammable, so that the colored backlight module 100 of the light-emitting keyboard of the present invention It can meet the flammability standard UL94 and has good safety.

The dot structure 3 is disposed on the lower surface and/or the upper surface of the light guide plate 1 . In this embodiment, the dot structure 3 is disposed on the lower surface of the light guide plate 1 . The dot structure 3 is formed by thermal embossing or spraying.

The light-emitting member 4 is an LED, which is disposed corresponding to the light guide plate 1 to provide light to the light guide plate 1 . The light-emitting member 4 emits light from the light-emitting surface 11 along the light guide plate 1 and the dot structure 3, so that the light can illuminate the keycaps above the colored backlight module 100 of the light-emitting keyboard.

The reflective plate 5 is arranged under the light guide plate 1, and at least a part of the surface of the reflective plate 5 is a reflective surface 51, the reflective surface 51 is facing the light guide plate 1, and the reflective surface 51 reflects the light emitted from the lower surface of the light guide plate 1 back. The light guide plate 1 has better luminous efficiency. In other embodiments, the reflector 5 may not be provided.

As shown in FIG. 1 , FIG. 3 and FIG. 4 , according to the colored backlight module 100 of the light-emitting keyboard according to the first embodiment of the present invention, the light guide plate 1 has a structure hole H. As shown in FIG. The structural hole H is a through hole for screwing through and/or assisting the colored backlight module 100 of the light-emitting keyboard of the present invention to dissipate heat. In other embodiments, the light guide plate 1 may also have no holes and no structural holes H are provided.

As shown in FIG. 2 , the colored backlight module 100a of the light-emitting keyboard according to the second embodiment of the present invention is substantially the same in structure as the colored backlight module 100 of the light-emitting keyboard according to the first embodiment, except that the second embodiment The polyimide light-shielding sheet 2 of the colored backlight module 100a of the light-emitting keyboard of the example has a light-shielding portion 21 and a light-transmitting portion. The light shielding portion 21 is opaque. The light-transmitting portion is a portion that is not shielded by the light-shielding portion 21 and can transmit light, and the light-transmitting portion allows the light emitted by the light-emitting surface 11 to penetrate.

In this embodiment, the light shielding portion 21 is a non-transparent film material. In other embodiments, the light shielding portion 21 may also be an opaque ink.

The polyimide light shielding sheet 2 also has structural holes H at positions corresponding to the structural holes H of the light guide plate 1 . The light shielding portion 21 is disposed around the structure hole H to prevent light from the light emitting member 4 from leaking from the structure hole H through the light guide plate 1 . In other embodiments, the light-shielding portion 21 is located at a position such as a keycap gap.

As shown in FIGS. 2 to 4 , according to the second embodiment of the present invention, the shading portion 21 is divided into upper and lower layers. The lower layer of the light shielding portion 21 is a white light shielding layer 211 for reflecting the light from the light guide plate 1 back to the light guide plate 1 . The upper layer of the light shielding portion 21 is a black light shielding layer 212 for blocking the light from the light guide plate 1 and passing through the white light shielding layer 211 . The range of the white light shielding layer 211 and the black light shielding layer 212 to cover the light guide plate 1 is the same. Of course, in other embodiments, only the white light-shielding layer 211 or only the black light-shielding layer 212 may be provided in the light-shielding portion 21 .

The above descriptions and descriptions are only the descriptions of the preferred embodiments of the present invention. Those with ordinary knowledge in this technology can make other modifications according to the scope of the patent application defined below and the above descriptions, but these modifications should still be It is the creative spirit of this creation and within the scope of rights of this creation.

100: Colored backlight module for luminous keyboard 100a: Colored backlight module for illuminated keyboard 1: light guide plate 11: light-emitting surface 2: Polyimide shading sheet 21: Shading part 211: White shading layer 212: Black shading layer 3: Network structure 4: Lighting components 5: Reflector 51: Reflective surface H: structural hole

[FIG. 1] is a schematic cross-sectional side view showing the colored backlight module of the light-emitting keyboard according to the first embodiment of the present invention; [FIG. 2] is a side cross-sectional schematic diagram showing a colored backlight module of a light-emitting keyboard according to a second embodiment of the present invention; [FIG. 3] is a schematic top view showing the polyimide light-shielding sheet of the colored backlight module of the light-emitting keyboard according to the first embodiment of the present invention; [Fig. 4] is a schematic bottom view showing the polyimide light-shielding sheet of the colored backlight module of the light-emitting keyboard according to the first embodiment of the present invention.

100: Colored backlight module for luminous keyboard

1: light guide plate

11: light-emitting surface

2: Polyimide shading sheet

3: Network structure

4: Lighting components

5: Reflector

51: Reflective surface

H: structural hole

Claims (5)

A colored backlight module for a light-emitting keyboard, comprising: a light guide plate with a light-emitting surface; a polyimide light-shielding sheet disposed on the light-emitting surface of the light-guiding plate, and the polyimide light-shielding sheet is transparent light; a dot structure, arranged on the lower surface and/or the upper surface of the light guide plate; and a light-emitting member, disposed corresponding to the light guide plate, so that the light-emitting member emits light along the light guide plate and the dot structure Light is emitted from the light emitting surface and penetrates the polyimide light shielding sheet. The colored backlight module of the light-emitting keyboard according to claim 1, wherein the light shielding sheet has an opaque light shielding portion and a translucent light transmitting portion, and the light transmitting portion allows the light emitted from the light emitting surface to penetrate. The colored backlight module of the light-emitting keyboard according to claim 2, wherein the shading portion is an upper and lower layer, the lower layer of the shading portion is a white shading layer, and the upper layer of the shading portion is a black shading layer. The colored backlight module of the light-emitting keyboard according to claim 2, wherein the polyimide light-shielding sheet has a structure hole, and the light-shielding portion is arranged around the structure hole. As claimed in claim 1, the colored backlight module of the light-emitting keyboard further comprises a reflective plate disposed under the light guide plate, and a reflective surface of the reflective plate faces the light guide plate.

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