CN215869076U - Backlight device used in luminous keyboard - Google Patents
Backlight device used in luminous keyboard Download PDFInfo
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- CN215869076U CN215869076U CN202121736576.6U CN202121736576U CN215869076U CN 215869076 U CN215869076 U CN 215869076U CN 202121736576 U CN202121736576 U CN 202121736576U CN 215869076 U CN215869076 U CN 215869076U
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- light
- guide plate
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- light guide
- circuit board
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Abstract
The utility model discloses a backlight device used in a luminous keyboard, the keyboard comprises a bottom plate and a keycap, a light shading plate is provided with a light emitting area, the edge part of a light guide plate is provided with a hollow part, the lower surface of the light guide plate is provided with a light reflecting part corresponding to the position of the keycap, and a luminous unit comprises a circuit board and a light source, the circuit board is arranged above the light guide plate, the light source is arranged below the circuit board and is positioned in the space of the hollow part, the hollow part of the light guide plate is used for placing the light source, so that the light source is embedded in the space of the hollow part, and the circuit board is arranged above the light guide plate, the assembly structure is more compact, the problem that the assembly parts of the keyboard need to be designed with a wall hollow groove structure because the circuit board protrudes downwards is avoided, the design and manufacturing cost is reduced, and the light reflecting part of the light guide plate can reflect light rays to irradiate to areas such as the keycaps with more concentrated light rays to form a concentrated luminous effect, the utilization rate of light is improved.
Description
Technical Field
The present invention relates to the field of backlight technologies, and in particular, to a backlight device for use in a light-emitting keyboard.
Background
A keyboard is a common input device that may be used in a variety of environments, such as in low light situations, where a lighted keyboard is used. In the existing light-emitting keyboard, the backlight device is disposed below the bottom plate of the keyboard to provide a light source for the light-emitting keyboard.
The light screen sets up in the below of keyboard bottom plate, and the light guide plate sets up in the light screen below, and the reflecting plate sets up in the light guide plate below, and the circuit board sets up in the reflecting plate below, because of the circuit board setting in the below of reflecting plate, can lead to the circuit board to be protruding downwards, takes place to interfere when leading to when assembling with other spare parts of keyboard, and the position is kept away to the assembly spare part that needs to take place to interfere is made the recess deliberately, increases design and manufacturing cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a backlight device used in a luminous keyboard, wherein a hollow part of a light guide plate is used for placing a light source, the light source is embedded in the space of the hollow part, and a circuit board is arranged above the light guide plate.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a backlight for use in a light emitting keyboard, the keyboard including a base and keycaps, the backlight comprising:
the light screen is arranged below the bottom plate and provided with a light emergent area;
the light guide plate is arranged below the shading plate, a hollow part is arranged at the edge part of the light guide plate, and a light reflecting part is arranged on the lower surface of the light guide plate and corresponds to the position of the keycap;
and the light-emitting unit is arranged on one side of the light guide plate and comprises a circuit board and a light source, the circuit board is arranged above the light guide plate, and the light source is arranged below the circuit board and is positioned in the space of the hollow part.
From this, the light guide plate is transparent material, can be with areas such as luminescence unit's light direction key cap, the light screen establishes out the light zone, light can follow the light zone of going out and shoot the keyboard and need luminous region, the fretwork portion of light guide plate is used for placing the light source, make the light source inlay the dress in the space of fretwork portion, and the top of light guide plate is located to the circuit board, this package assembly is compacter, occupation space is littleer, the circuit board can not downward protrusion light guide plate or backlight unit, avoid needing design wall dead slot structure because of the package assembly spare part of circuit board downward protrusion keyboard, reduce design manufacturing cost.
The light reflection part of the light guide plate can reflect light, and the light is concentrated to regions such as keycaps to form a concentrated light emitting effect, so that the utilization rate of the light is improved.
In some embodiments, the light reflecting portion is provided with a reflection point.
Therefore, the light reflecting part is provided with a plurality of uniformly distributed reflecting points so as to reflect light more intensively.
In some embodiments, the light shielding plate is provided with a through hole, and the through hole can accommodate the circuit board.
Therefore, the circuit board can be placed in the through hole, so that the structure of the backlight device is more compact.
In some embodiments, the shading plate is further provided with a shading area, and the shading area is provided with a black printing tape or black ink.
From this, the light screen forms out light zone and shading district through setting up seal black sticky tape and black printing ink, and the shading district can shelter from light, goes out the light zone and can be with regional such as light directive key cap.
In some embodiments, the backlight device further includes a reflective plate disposed under the light guide plate.
Therefore, the reflecting plate can reflect the light rays leaving the light guide plate back to the light guide plate so as to improve the utilization rate of the light rays.
In some embodiments, the edge portion of the reflection plate is bonded to the edge portion of the light shielding plate.
Therefore, the edge part of the reflecting plate is bonded with the edge part of the light shielding plate, so that the light guide plate between the reflecting plate and the light shielding plate is limited, the horizontal movement of the light guide plate is prevented or reduced, and the assembly precision is improved.
The utility model has the beneficial effects that: the hollow-out part of light guide plate is used for placing the light source, makes the light source inlay the space of adorning in the hollow-out part to the top of light guide plate is located to the circuit board, and this package assembly is compacter, and the circuit board can not be downward protrusion, avoids needing to design wall dead slot structure because of the package assembly spare part of circuit board downward protrusion keyboard.
Drawings
FIG. 1 is an exploded view of a backlight assembly for use in a lighted keyboard in accordance with the present invention;
FIG. 2 is a cross-sectional view of a backlight device for use in a light-emitting keyboard according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is another cross-sectional view of a backlight device for use in a lighted keyboard in accordance with the present invention;
wherein: 10-a backlight device; 1-a visor; 11-through holes; 2-a light guide plate; 21-a hollowed-out portion; 22-a light reflecting part; 3-a light-emitting unit; 31-a light source; 32-a circuit board; 4-a reflector plate; 20-a keyboard assembly; 201-a backplane; 202-key cap.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 4, a backlight device for use in a light emitting keyboard, the keyboard including a base plate 201 and a key cap 202, the backlight device 10 including a light shielding plate 1, a light guide plate 2 and a light emitting unit 3;
the light shading plate 1 is arranged below the bottom plate 201, and the light shading plate 1 is provided with a light emergent area;
the light guide plate 2 is arranged below the shading plate 1, a hollow part 21 is arranged at the edge part of the light guide plate 2, a light reflecting part 22 is arranged on the lower surface of the light guide plate 2, and the light reflecting part 22 corresponds to the position of the keycap 202;
the light emitting unit 3 is disposed on one side of the light guide plate 2, the light emitting unit 3 includes a circuit board 32 and a light source 31, the circuit board 32 is disposed above the light guide plate 2, the light source 31 is disposed below the circuit board 32 and located in the space of the hollow portion 21, and the light source 31 is an LED.
The light guide plate 2 is made of transparent materials, the light of the light emitting unit 3 can be guided to regions such as the key caps 202, the light shielding plate 1 is provided with a light emitting region, light can be emitted to the regions such as the key caps 202 needing to emit light from the light emitting region, the hollow part 21 of the light guide plate 2 is used for placing the light source 31, the light source 31 is embedded in the space of the hollow part 21, the circuit board 32 is arranged above the light guide plate 2, the assembly structure is more compact, the occupied space is smaller, the circuit board 32 cannot protrude the light guide plate 2 or the backlight device 10 downwards, the problem that the assembly parts of the keyboard need to be designed into a wall hollow groove structure due to the downward protrusion of the circuit board 32 is avoided, and therefore the design and manufacturing cost is reduced.
Moreover, the bottom of the backlight device 10 is more flat, the assembly process is simple and convenient, and the backlight brightness and uniformity can achieve better effects.
The light reflecting part 22 of the light guide plate 2 can reflect light rays, so that the light rays are emitted to the key cap 202 and other areas in a concentrated manner, a concentrated light emitting effect is formed, and the utilization rate of the light rays is improved.
Further, the light reflecting portion 22 is provided with a reflecting point. The light reflecting portion 22 has a plurality of reflective dots uniformly distributed to reflect light more intensively.
To explain, referring to fig. 4, the light shielding plate 1 is provided with a through hole 11, and the through hole 11 can accommodate the circuit board 32. The circuit board 32 can be placed in the through hole 11, making the structure of the backlight device 10 more compact.
To explain further, the circuit board 32 may also be disposed between the light shielding plate 1 and the light guide plate 2.
Further, the shading plate 1 is further provided with a shading area, and the shading area is provided with a black printing tape or black printing ink.
The shading plate 1 forms a light emitting area and a shading area through setting a black printing adhesive tape and black printing ink, the shading area can shade light, and the light emitting area can emit the light to areas such as the keycap 202.
To explain further, the backlight device 10 further includes a reflective plate 4, and the reflective plate 4 is disposed below the light guide plate 2.
The reflecting plate 4 can reflect the light leaving the light guide plate 2 back to the light guide plate 2, so as to improve the utilization rate of the light.
Further, the edge portion of the reflection plate 4 is bonded to the edge portion of the light shielding plate 1. The edge part of the reflecting plate 4 is adhered to the edge part of the light shielding plate 1, so that the light guide plate 2 between the reflecting plate 4 and the light shielding plate 1 is limited, the horizontal movement of the light guide plate 2 is prevented or reduced, and the assembly precision is improved.
The foregoing disclosure discloses only some embodiments of the utility model. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept herein, and it is intended to cover all such modifications and variations as fall within the scope of the utility model.
Claims (7)
1. A backlight device for use in a light-emitting keyboard, the keyboard comprising a base plate (201) and key caps (202), the backlight device (10) comprising:
the light shielding plate (1) is arranged below the bottom plate (201), and the light shielding plate (1) is provided with a light emergent area;
the light guide plate (2) is arranged below the shading plate (1), a hollow-out part (21) is arranged at the edge part of the light guide plate (2), a light reflecting part (22) is arranged on the lower surface of the light guide plate (2), and the light reflecting part (22) corresponds to the keycap (202); and
the light emitting unit (3) is arranged on one side of the light guide plate (2), the light emitting unit (3) comprises a circuit board (32) and a light source (31), the circuit board (32) is arranged above the light guide plate (2), and the light source (31) is arranged below the circuit board (32) and located in the space of the hollow portion (21).
2. A backlight device for use in a light-emitting keyboard according to claim 1, wherein said light reflecting portion (22) is provided with reflecting dots.
3. A backlight device for use in a light-emitting keyboard according to claim 1, wherein the light-shielding plate (1) is provided with a through hole (11), the through hole (11) being capable of accommodating the circuit board (32).
4. A backlight device for use in a light-emitting keyboard according to claim 1 or 3, characterized in that the shading plate (1) is further provided with a shading area provided with a black tape or black ink.
5. A backlight device for use in a light-emitting keyboard according to claim 1, wherein the backlight device (10) further comprises a reflective plate (4), the reflective plate (4) being provided below the light guide plate (2).
6. The backlight device for use in a light-emitting keyboard according to claim 5, wherein an edge portion of the reflection plate (4) is bonded to an edge portion of the light-shielding plate (1).
7. A backlight device for use in a light-emitting keyboard according to claim 1, characterized in that the light source (31) is an LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121736576.6U CN215869076U (en) | 2021-07-28 | 2021-07-28 | Backlight device used in luminous keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121736576.6U CN215869076U (en) | 2021-07-28 | 2021-07-28 | Backlight device used in luminous keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215869076U true CN215869076U (en) | 2022-02-18 |
Family
ID=80328283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121736576.6U Active CN215869076U (en) | 2021-07-28 | 2021-07-28 | Backlight device used in luminous keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215869076U (en) |
-
2021
- 2021-07-28 CN CN202121736576.6U patent/CN215869076U/en active Active
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