CN201166312Y - Backlight device and input device using the backlight device - Google Patents

Abstract

The utility model discloses a backlight device and use this kind of backlight device's input device is disclosed. According to the present invention, a backlight device includes a light guide plate, a circuit board and a plurality of first light emitting elements. The light guide plate is substantially rectangular and has a plurality of notches. The plurality of notches are formed on a long side of the rectangle. The circuit board is arranged under the light guide plate. The plurality of first light-emitting elements are arranged on the circuit board, and each first light-emitting element in the plurality of first light-emitting elements corresponds to and is accommodated in one notch in the plurality of notches. In particular, the plurality of first light emitting elements emit light in a direction perpendicular to the long side of the rectangle.

Description

Backlight device and input device using the backlight device

technical field

The utility model relates to a backlight device and an input apparatus using the backlight device, in particular to a backlight device capable of producing better light distribution and facilitating assembly.

Background technique

With the development of technology, the designs of computer peripheral devices (such as mouse, keyboard and other input devices) are more and more diversified. In addition to considering the function of the product, the visual effect of the product will also affect the sales volume to some extent and is getting more and more attention. For example, if the buttons on products such as mice and keyboards can emit light, in addition to being visually attractive, they can also be used at night or in places with insufficient lighting. Therefore, such products will have more market potential than products without luminous effects.

US Patent No. 7,086,768 discloses a luminous keyboard. See Figure 1. FIG. 1 is a schematic diagram illustrating a combination of a light guide plate G and light emitting diodes ( LED1 - LED4 ) in a light-emitting keyboard in the background art. As shown in FIG. 1 , four holes H are formed in the center of the light guide plate G, which are symmetrical in pairs. Thus, the light-emitting diodes can pass through the plurality of holes H and emit light toward the direction of the long side of the light-emitting keyboard. However, the luminous keyboard shown in FIG. 1 is only suitable for small-sized keyboards. When the length of the keyboard increases, the uniformity of light distribution in the luminous keyboard is poor due to the long distance between the long sides.

Utility model content

The object of the present invention is to provide a backlight device and an input device using the backlight device, so as to solve the above problems.

The purpose of the utility model is achieved by providing a backlight device, which includes a light guide plate, a circuit board and a plurality of first light emitting elements. The light guide plate is substantially rectangular and has a plurality of notches. The plurality of notches are formed on a long side of the rectangle. The circuit board is arranged under the light guide plate. The plurality of first light-emitting elements are arranged on the circuit board, and each first light-emitting element of the plurality of first light-emitting elements corresponds to and accommodates a notch in the plurality of notches. In particular, the plurality of first light emitting elements emit light in a direction perpendicular to the long side of the rectangle. The above content is the first technical solution.

The utility model also provides a backlight device. The backlight device includes a light guide plate, a circuit board and a plurality of light emitting elements. The light guide plate is substantially rectangular and has a plurality of notches and a plurality of holes. The plurality of notches are formed on a long side of the rectangle, and the plurality of holes are formed on the light guide plate and are close to the long side. The circuit board is arranged under the light guide plate. The plurality of light emitting elements are arranged on the circuit board, and each light emitting element of the plurality of light emitting elements is corresponding to and accommodated in a notch of the plurality of notches or a hole of the plurality of holes. The above is the second technical solution

The utility model also provides an input device using a backlight device. The input device includes the backlight device as described in the above first technical solution according to the present utility model, a bottom plate and a plurality of keys. The bottom plate is arranged on the backlight device. A plurality of keys are arranged on the base plate and can move up and down relative to the base plate.

The utility model also provides an input device using a backlight device. The input device includes the backlight device described in the second technical solution according to the present utility model, a bottom plate and a plurality of keys. The bottom plate is arranged on the backlight device. A plurality of keys are arranged on the base plate and can move up and down relative to the base plate.

The advantage of the present utility model is that, compared with the background technology, the light guide plate in the backlight device of the present utility model has a plurality of notches formed on a long side of the light guide plate/and a plurality of notches formed near the long side hole. Therefore, the light-emitting elements on the circuit board are corresponding to and accommodated in the plurality of notches or the plurality of holes, and emit light toward a direction perpendicular to the long side. Therefore, the light emitted by the light-emitting element can be more uniformly distributed in the input device, and the formation of the plurality of notches or the plurality of holes can provide a positioning function during the assembly process of the backlight device to facilitate assembly.

The advantages and spirit of the present utility model can be further understood through the following detailed description of the utility model and the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of a combination of a light guide plate and a light emitting diode in a luminous keyboard in the background technology;

2A to 2C are schematic diagrams of a backlight device according to a first embodiment of the present invention;

3 is a schematic diagram of a backlight device of a second embodiment of the present invention;

Fig. 4 is an appearance view of an input device of a third specific embodiment of the present invention;

Fig. 5 is a sectional view of the input device of the third embodiment of the present invention.

Description of main component symbols

G: Light guide plate LED1～LED4: Light-emitting diode

H: hole

1, 2: Backlight device 10, 20: Light guide plate

12, 22: Circuit board 14: The first light-emitting element

16: Second light-emitting element 24: Light-emitting element

100, 200: Notches 102, 202: Holes

3: Input device 30: Button

32: Bottom plate 34: Supporting device

Detailed ways

See Figure 2A. FIG. 2A is a schematic diagram illustrating a backlight device 1 according to a first embodiment of the present invention. The backlight device 1 can be applied to an input device (such as a computer keyboard), but not limited thereto.

As shown in FIG. 2A , the backlight device 1 includes a light guide plate 10 , a circuit board 12 and a plurality of first light emitting elements 14 . The light guide plate 10 is substantially rectangular and has a plurality of notches 100 . In addition, the light guide plate 10 may include a reflective portion. For example, the reflective portion is a reflective surface and is formed on the light guide plate 10 . Further, the backlight device 1 may include a reflective member (not shown in FIG. 2A ). The reflective member may be a reflective plate and is disposed under the light guide plate 10 .

The plurality of notches 100 may be formed on a long side of the rectangle. In a specific embodiment, the plurality of notches 100 may be formed by stamping. It should be noted that the number of the plurality of notches 100 and the distance between them are designed according to practical applications, and are not limited to those shown in FIG. 2A . Furthermore, a plurality of notches 100 can be formed on the two long sides of the rectangle respectively, and the number, spacing and arrangement rules of the plurality of notches 100 on the two long sides can be designed according to actual applications.

The circuit board 12 is disposed under the light guide plate 10 , and the plurality of first light emitting elements 14 are disposed on the circuit board 12 . In a specific embodiment, the plurality of first light emitting elements 14 can be formed on a printed circuit board 12 or a flexible printed circuit board 12 , but not limited thereto. The plurality of first light emitting elements 14 may be light emitting diodes, but not limited thereto.

Each first light emitting element 14 can emit N light rays. Each of the N light rays has a color, and N is an integer greater than 1, so that the light emitted by the plurality of first light emitting elements 14 can be mixed into light of various colors. For example, the N light rays may include at least two light rays among red light rays, green light rays and blue light rays.

Each first light emitting element 14 of the plurality of first light emitting elements 14 corresponds to a notch 100 of the plurality of notches 100 . In practical application, the circuit board 12 can be glued on the light guide plate 10 , so that each first light-emitting element 14 can be accommodated in a notch 100 among the plurality of notches 100 . In particular, the plurality of first light emitting elements 14 can emit light in a direction substantially perpendicular to the long side of the rectangle. In other words, the plurality of first light emitting elements 14 emit light toward the short side of the light guide plate 10 . Since the short side is longer in length and the other side is much shorter, the light emitted by the plurality of first light-emitting elements 14 is easier to distribute evenly in the input device, especially the mixed-color light generated by light of different colors. Furthermore, compared with the background technology, the utility model can be applied to a long-length light-emitting input device. In addition, since the plurality of notches 100 are formed on the edge of the light guide plate 10 , the plurality of notches 100 can provide a positioning function in the assembly of the backlight device 1 . A light-shielding layer can be wrapped around the light-emitting element 14 so that light can be irradiated in a single direction.

See Figure 2B. In this embodiment, each notch 100 does not necessarily accommodate only one light emitting element. Referring to FIG. 2B , each notch 100 can be designed as an elongated notch 100 , and each elongated notch 100 can accommodate two light emitting elements. In practice, the length of each notch 100 can be designed according to the number of light emitting elements to be accommodated, and is not limited to that shown in FIG. 2B .

See Figure 2C. FIG. 2C is a schematic diagram illustrating a further embodiment of the backlight device 1 shown in FIG. 2A . As shown in FIG. 2C , in addition to the plurality of notches 100 , the light guide plate 10 further includes a plurality of holes 102 , and the plurality of holes 102 may be formed on the light guide plate 10 near the long side.

The backlight device 1 may also include a plurality of second light emitting elements 16 . The plurality of second light emitting elements 16 are formed on the circuit board 12 , and each second light emitting element 16 of the plurality of second light emitting elements 16 corresponds to a hole 102 of the plurality of holes 102 . Therefore, when the circuit board 12 is adhered to the light guide plate 10 , each second light emitting element 16 corresponding to the hole 102 can be accommodated in the hole 102 . Like each first light emitting element 14, each second light emitting element 16 can emit light in the direction substantially perpendicular to the long side of the rectangle. Likewise, the length of each hole 102 can be designed according to the number of light emitting elements to be accommodated.

Besides the plurality of light emitting elements, the backlight device 1 also includes electronic elements formed on the circuit board 12 . In order to avoid that when the circuit board 12 is bonded on the light guide plate 10, the size or position of some electronic components itself makes the circuit board 12 unable to be bonded on the light guide plate 10 smoothly, so the plurality of notches 100 or The positions of the plurality of holes 102 can also be designed corresponding to the positions of the plurality of electronic components, so that each electronic component can be accommodated in a notch 100 of the plurality of notches 100 or a hole in the plurality of holes 102 102. Therefore, the thickness of the backlight device 1 can be effectively reduced.

See Figure 3. FIG. 3 is a schematic diagram illustrating a backlight device 2 according to a second embodiment of the present invention.

As shown in FIG. 3 , the backlight device 2 includes a light guide plate 20 , a circuit board 22 and a plurality of light emitting elements 24 . The light guide plate 20 is substantially rectangular and has a plurality of notches 200 and a plurality of holes 202 . The plurality of notches 200 are formed on a long side of the rectangle, and the plurality of holes 202 are formed on the light guide plate 20 close to the long side. The circuit board 22 is disposed under the light guide plate 20 . The plurality of light emitting elements 24 are disposed on the circuit board 22 , and each light emitting element 24 of the plurality of light emitting elements 24 corresponds to and is accommodated in a notch 200 or the plurality of holes 202 in the plurality of notches 200 A hole 202 in the. In particular, the plurality of light emitting elements 24 emit light in a direction perpendicular to the long side of the rectangle.

A third embodiment according to the present invention is an input device using the backlight device according to the present invention. Please refer to Figure 4 and Figure 5. FIG. 4 is an appearance view of an input device 3 according to a third embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating an input device 3 according to a third embodiment of the present invention. The input device 3 can be a computer keyboard or a key set of a portable device, but is not limited thereto.

The input device 3 includes the backlight device 1 as described in the first embodiment of the present invention, a bottom plate 32 , a plurality of supporting devices 34 and a plurality of keys 30 (as shown in FIG. 4 ). The base plate 32 is disposed on the backlight device 1 . A plurality of buttons 30 are arranged on the bottom plate 32 and can move up and down relative to the bottom plate 32 through the supporting device 34 . Therefore, according to the present invention, the light generated by the backlight device 1 can be evenly distributed in the input device 3 and illuminate the plurality of keys 30 . The key 30 includes a transparent material to allow light to penetrate the key 30 .

A fourth specific embodiment according to the present invention is an input device using the backlight device according to the present invention. The input device includes the backlight device as described in the second embodiment of the present invention, a bottom plate and a plurality of keys. The bottom plate is arranged on the backlight device. A plurality of keys are arranged on the base plate and can move up and down relative to the base plate.

Compared with the background art, the light guide plate in the backlight device according to the present invention has a plurality of notches formed on a long side of the light guide plate/and a plurality of holes formed near the long side. Therefore, the light-emitting elements on the circuit board are corresponding to and accommodated in the plurality of notches or the plurality of holes, and emit light toward a direction perpendicular to the long side. Therefore, the light emitted by the light-emitting element can be more uniformly distributed in the input device, and the formation of the plurality of notches or the plurality of holes can provide a positioning function during the assembly process of the backlight device to facilitate assembly.

Claims (30)

1, a kind of back lighting device is characterized in that, this back lighting device comprises: LGP, this LGP are rectangle and have a plurality of recesses that these a plurality of recesses are formed on the long limit of this rectangle; Circuit board is arranged under this LGP; And a plurality of first light-emitting components, it is corresponding and be contained in a recess in these a plurality of recesses that these a plurality of first light-emitting components are arranged on each first light-emitting component on this circuit board and in these a plurality of first light-emitting components; Wherein, these a plurality of first light-emitting components are launched light towards this direction of growing the limit perpendicular to this rectangle.

2, back lighting device as claimed in claim 1, it is characterized in that, this LGP more comprises a plurality of holes, these a plurality of holes are formed on this LGP and close this length limit, this back lighting device more comprises a plurality of second light-emitting components, these a plurality of second light-emitting components are formed on this circuit board, and each second light-emitting component in these a plurality of second light-emitting components is corresponding and be contained in a hole in these a plurality of holes, causes each second light-emitting component that should hole is launched light towards this direction perpendicular to this length limit of this rectangle.

3, back lighting device as claimed in claim 2 is characterized in that, these a plurality of first light-emitting components and these a plurality of second light-emitting components are formed on printed circuit board (PCB) or the flexible printed wiring board.

4, back lighting device as claimed in claim 3 is characterized in that, further comprises the electronic component that is formed on this circuit board, and this electronic component is to hole one of in recess one of in should a plurality of recesses or this a plurality of holes.

5, back lighting device as claimed in claim 3 is characterized in that, each first light-emitting component or each second light-emitting component can send N light, and each light in this N light has color separately, and N is the integer greater than 1.

6, back lighting device as claimed in claim 5 is characterized in that, this N light comprises at least two light in the group that is made up of red light, green light and blue ray.

7, back lighting device as claimed in claim 2 is characterized in that, further comprises reflective member, is arranged under this LGP.

8, back lighting device as claimed in claim 1 is characterized in that, this LGP comprises reflective position.

9, back lighting device as claimed in claim 8 is characterized in that, this reflective position is reflecting surface and is formed on this LGP.

10, back lighting device as claimed in claim 1 is characterized in that, this circuit board is bonded on this LGP.

11, a kind of back lighting device, it is characterized in that this back lighting device comprises: LGP, this LGP are rectangle and have a plurality of recesses and a plurality of hole, these a plurality of recesses are formed on the long limit of this rectangle, and these a plurality of holes are formed on this LGP and close this length limit; Circuit board is arranged under this LGP; And a plurality of light-emitting components, these a plurality of light-emitting components are arranged on this circuit board, and each light-emitting component in these a plurality of light-emitting components is to hole one of in recess one of in should a plurality of recesses or this a plurality of holes.

12, back lighting device as claimed in claim 11 is characterized in that, these a plurality of light-emitting components are launched light towards this direction of growing the limit perpendicular to this rectangle.

13, back lighting device as claimed in claim 11 is characterized in that, these a plurality of light-emitting components are arranged on printed circuit board (PCB) or the flexible printed wiring board.

14, back lighting device as claimed in claim 13 is characterized in that, further comprises the electronic component that is formed on this circuit board, and this electronic component is to hole one of in recess one of in should a plurality of recesses or this a plurality of holes.

15, back lighting device as claimed in claim 13 is characterized in that, each light-emitting component can send N light, and each light in this N light has color separately, and N is the integer greater than 1.

16, back lighting device as claimed in claim 15 is characterized in that, this N light comprises at least two light in the group that is made up of red light, green light and blue ray.

17, back lighting device as claimed in claim 11 is characterized in that, further comprises reflective member, is arranged under this LGP.

18, back lighting device as claimed in claim 11 is characterized in that, this LGP comprises reflective position.

19, back lighting device as claimed in claim 18 is characterized in that, this reflective position is reflecting surface and is formed on this LGP.

20, back lighting device as claimed in claim 11 is characterized in that, this circuit board is bonded on this LGP.

21, a kind of input unit that uses back lighting device is characterized in that, comprises: back lighting device as claimed in claim 1; Base plate is arranged on this back lighting device; And a plurality of buttons, being arranged on this base plate, these a plurality of buttons can move up and down with respect to this base plate.

22, input unit as claimed in claim 21, it is characterized in that, this LGP more comprises a plurality of holes, these a plurality of holes are formed on this LGP and close this length limit, this back lighting device more comprises a plurality of second light-emitting components, these a plurality of second light-emitting components are formed on this circuit board, and each second light-emitting component in these a plurality of second light-emitting components is corresponding and one of be contained in these a plurality of holes hole, causes each second light-emitting component that should hole is launched light towards this direction perpendicular to this length limit of this rectangle.

23, input unit as claimed in claim 22 is characterized in that, these a plurality of first light-emitting components and these a plurality of second light-emitting components are formed on printed circuit board (PCB) or the flexible printed wiring board.

24, input unit as claimed in claim 21 is characterized in that, this circuit board is bonded on this LGP.

25, input unit as claimed in claim 21 is characterized in that, further comprises reflective member, is arranged under this LGP.

26, a kind of input unit that uses back lighting device is characterized in that, comprises: back lighting device as claimed in claim 11; Base plate is arranged on this back lighting device; And a plurality of buttons, being arranged on this base plate, these a plurality of buttons can move up and down with respect to this base plate.

27, input unit as claimed in claim 26 is characterized in that, these a plurality of light-emitting components are launched light towards this direction of growing the limit perpendicular to this rectangle.

28, input unit as claimed in claim 26 is characterized in that, these a plurality of light-emitting components are formed on printed circuit board (PCB) or the flexible printed wiring board.

29, input unit as claimed in claim 26 is characterized in that, this circuit board is bonded on this LGP.

30, input unit as claimed in claim 26 is characterized in that, further comprises reflective member, is arranged under this LGP.

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