CN1301454C - illuminated keyboard - Google Patents

Abstract

The present invention provides a light emitting keyboard comprising: a keyboard part with a key; a light guide plate arranged below the keyboard part, wherein the light guide plate is provided with an opening which is arranged in the region except the region right below the key; and a light source adjacent to the light guide plate.

Description

illuminated keyboard

technical field

The invention relates to a luminous keyboard.

Background technique

A keyboard is a common input device, which is used in various electronic products, such as personal computers, mobile phones, remote controls, and so on. These electronic products have the potential to be used in a variety of environments, such as in low light situations. In order to meet the above demands, a luminous keyboard capable of emitting light by itself has been proposed.

In the existing luminous keyboard, a group of light sources plus a light guide plate provide light to the keys of the luminous keyboard. Generally speaking, the light guide plate is a transparent plate, and through the design of the reflection point, the light can be evenly distributed in the light guide plate to illuminate the keys of the light-emitting keyboard.

As today's electronic products tend to become thinner, thinner and smaller, how to use various energy sources more efficiently has become an important issue. Therefore, the design of the existing light guide plate still needs to be improved in order to increase the efficiency of the light source and achieve the purpose of low power consumption of electronic products.

Contents of the invention

In view of this, the purpose of the present invention is to provide a luminous keyboard to solve the above problems.

The object of the present invention is achieved by providing a luminous keyboard, which includes: a keyboard part with a key; a light guide plate arranged under the keyboard part, the light guide plate has an opening, the opening is arranged on an area other than directly below the key; and a light source adjacent to the light guide plate.

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the preferred embodiments are specially cited, and in conjunction with the accompanying drawings, the detailed description is as follows:

Description of drawings

FIG. 1 is an exploded view of a luminous keyboard according to a first embodiment of the present invention;

2 is a top view of the light guide plate of the first embodiment of the present invention;

Fig. 3 is an exploded view of a luminous keyboard according to a second embodiment of the present invention;

FIG. 4 is a top view of a light guide plate according to a second embodiment of the present invention.

Detailed ways

The main spirit of the present invention is to hollow out the area of the light guide plate of the luminous keyboard that does not correspond to the key, and set reflective material on the inner surface of the hollowed out part, thereby reducing the area where the light passes, thereby improving the efficiency of the light source.

first embodiment

FIG. 1 is an exploded view of a luminous keyboard 10 according to a first embodiment of the present invention. As shown in the figure, the luminous keyboard 10 includes a keyboard portion 20 and a backlight device 30 . The keyboard part 20 has keys 21 and a bottom plate 22 . The button 21 is arranged on the base plate 22 and can move up and down relative to the base plate 22 . The backlight device 30 is disposed under the keyboard portion 20 and has a light guide plate 31 a , a reflector 32 , a light source 33 and a shield 34 . The light source 33 is a light emitting diode (Light Emitting Diode, LED), and is disposed on a side of the light guide plate 31a. The shielding member 34 covers one side of the light source 33 so that the light 36 emitted by the light source 33 can be completely guided into the light guide plate 31 a and exit from above the light guide plate 31 a. Thus, the light source 33 can provide the light 36 required by the keyboard part 20 from the bottom of the keyboard part 20 .

To further illustrate, the bottom of the light guide plate 31 a has a light reflection portion 35 , and the light reflection portion 35 corresponds to the keys 21 in a one-to-one manner. The light reflection part 35 has a plurality of reflection points, and each reflection point is disposed on the bottom of the light guide plate 31a by printing. Thus, the light 36 emitted by the light source 33 into the light guide plate 31 a will be reflected to the key 21 when hitting the reflection points of the light reflection part 35 , thereby forming a concentrated light emitting effect.

In addition, the light reflection part 35 has fewer reflection points near the light source 33 and more reflection points away from the light source 33, so that the brightness received by each key 21 of the luminous keyboard 10 tends to be consistent. In addition, the reflection plate 32 is disposed under the light guide plate 31a, and reflects the light 36 exiting through the bottom of the light guide plate 31a back into the light guide plate 31a, so as to improve the use efficiency of the light 36 .

Furthermore, the light guide plate 31 a has several openings 37 . The opening 37 is disposed in an area other than directly below the key 21 and does not overlap with the area where the light reflection portion 35 is located. The opening 37 penetrates the upper and lower surfaces of the light guide plate 31a. In addition, the inner surface of the opening 37 is pasted and has a reflective layer 38 so that the light 36 cannot enter the opening 37 . The reflective layer 38 can be a white PET (Polyethylene Terephthalate) reflective film, or a thin film made of barium sulfide (BaS), which is fixed on the inner surface of the opening 37 by electroplating or pasting.

FIG. 2 is a top view of the light guide plate 31a according to the first embodiment of the present invention. It can be clearly seen from the figure that the opening 37 is disposed in an area other than the area directly below the key 21 , and does not overlap with the area where the light reflection portion 35 is located.

second embodiment

FIG. 3 is an exploded view of the luminous keyboard 10 according to the second embodiment of the present invention. FIG. 4 is a top view of a light guide plate 31b according to a second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the light guide plate 31 b further has several through holes 39 . The through hole 39 can be used for accommodating the light source 33 , and the shielding member 34 in the first embodiment can be omitted. For other components, please refer to the description of the first embodiment, and details are not repeated here.

In the luminous keyboard of the present invention, the area in the light guide plate not corresponding to the key is hollowed out, and a reflective material is arranged on the inner surface of the hollowed out part. In this way, the light emitted by the light source to the light guide plate only travels in the area corresponding to the key, that is, the area that the luminous keyboard actually needs to be illuminated. Accordingly, the area that the light passes through can be reduced, the energy loss caused by multiple reflections of the light can be reduced, and the efficiency of the light source can be improved.

Although the present invention has been disclosed in conjunction with the above preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore The scope of protection of the present invention should be defined by the claims.

Claims (11)

1. illuminated keyboard comprises:

One keypad portion has a button;

One light guide plate is arranged at this keypad portion below, and this light guide plate has an opening, the zone beyond this opening is arranged under this button; And

One light source is adjacent to by this light guide plate.

2. illuminated keyboard as claimed in claim 1 also comprises a reflector layer, and this reflector layer is arranged at the inside surface of this opening.

3. illuminated keyboard as claimed in claim 2, wherein this reflector layer is arranged at the inside surface of this opening with plating mode.

4. illuminated keyboard as claimed in claim 2, wherein this reflector layer is to paste the inside surface that mode is arranged at this opening.

5. illuminated keyboard as claimed in claim 2, wherein this reflector layer is a white PET reflectance coating.

6. illuminated keyboard as claimed in claim 2, wherein this reflector layer is made by barium sulphide.

7. illuminated keyboard as claimed in claim 1, wherein the bottom surface of this light guide plate has a plurality of reflection spots corresponding to this button, and this opening and this each reflection spot are independently of one another.

8. illuminated keyboard as claimed in claim 1, wherein this keypad portion also has a base plate, and this button is being arranged on respect to the mode that this base plate moves up and down on this base plate.

9. illuminated keyboard as claimed in claim 1 also comprises a reflecting plate, is arranged on this light guide plate below.

10. illuminated keyboard as claimed in claim 1, wherein this light source is a light emitting diode.

11. illuminated keyboard as claimed in claim 1, wherein this light guide plate also has a perforation, in order to ccontaining this light source.

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