CN201170996Y

CN201170996Y - Light conduction device for electronic device key-press

Info

Publication number: CN201170996Y
Application number: CNU2008201015659U
Authority: CN
Inventors: 宋俊强
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-04
Filing date: 2008-03-04
Publication date: 2008-12-24
Anticipated expiration: 2018-03-04

Abstract

The utility model discloses an electronic device key set light guide device which is connected with a PCB board and comprises a light guide board and LED lights of the same quantity of taper holes. The light guide board is provided with a key set through hole which is adaptable with an electronic device key set, and the bottom surface of the light guide board is provided with the taper holes with small tops and big bottoms. The LED lights are arranged on the PCB board, and each LED light is respectively arranged just under each taper hole and lightens upwards. The LED lights lighten upwards and irradiate at the taper holes, the inclined planes of the taper holes reflect, refract and uniformly irradiate the beam of the LED lights into the light guide board to be used for illuminating a key set, so the electronic device key set light guide device has simple design, simple shape, convenient processing, easy manufacture and good brightness and uniformity and is not required to calculate the reflection angle of a light path.

Description

A kind of electronic equipment key light guide device

Technical field

The utility model relates to a kind of electronic equipment key light guide device.

Background technology

Mobile phone all has the key illumination design in the existing mobile phone technique, so that still can use in the dark.Traditional illumination Design has following two kinds of methods.

First kind, the LED lamp is placed on the mobile phone PVB plate, directly the directive mobile phone key.Make simple advantage though this kind illumination Design has, also have following weak point: one, owing to will being provided with plurality of LEDs lamp (generally at 6-12), so cost height, power consumption are big; Its two, if mobile phone key pattern complexity, then poor visual effect.

Second kind, the EL electroluminescence.Product is thin though this kind illumination Design has, luminous advantage of uniform, but also have following weak point: EL light tiles shortcoming on mobile phone is used is very outstanding, promptly not only the life-span is short, brightness is low, can produce high frequency noise, and easy interference handset circuit.

According to above-mentioned deficiency, the someone has proposed solution, and the denomination of invention of announcing on December 07th, 2005 as Chinese patent database is the utility model of " mobile phone press key light guide plate ", and its patent No. ZL200420095020.3, notification number are CN2745289Y.Mobile phone press key light guide plate all is to adopt side-emitting LED basically at present.Though this patent has the advantage that only adopts a LED lamp, also have following deficiency: one, light guide plate need the accurate refraction angle of a lot of calculating to come all light, and design difficulty is bigger, complex-shaped, processing is difficult for; Its two, be difficult for reaching ideal effect aspect the brightness and the uniformity.

The utility model content

The utility model provides a kind of electronic equipment key light guide device, it has overcome the background technology key illumination and has designed that existing design difficulty is bigger, complex-shaped, processing is difficult for, is being difficult for reaching the deficiency of ideal effect aspect the brightness and the uniformity, and has reached the purpose of simple shape, easy to process, brightness and good evenness.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of electronic equipment key light guide device, it is connected pcb board, it comprise a light guide plate and with the LED lamp of numbers such as taper hole.This light guide plate offers the button through hole of adaptive electronic equipment button, and this bottom surface of light guide plate offers up-small and down-big taper hole.Those LED lamps all are located on the pcb board, and this each LED lamp lays respectively at the just following and upwards luminous of each taper hole.

In the preferred embodiment of the present utility model, this bottom surface of light guide plate offers two up-small and down-big taper holes.

In the preferred embodiment of the present utility model, this taper hole is circular taper hole.

In the preferred embodiment of the present utility model, this taper hole is many prismatics taper hole.

In the preferred embodiment of the present utility model, this taper hole drift angle is the 70-100 degree.

In the preferred embodiment of the present utility model, also comprise the light-shielding sheet with number such as taper hole, each light-shielding sheet all card be located at the light guide plate end face and respectively lid establish each taper hole.

In the preferred embodiment of the present utility model, be provided with transparent plastic portion in this light guide plate.

In the preferred embodiment of the present utility model, be provided with transparent ball in this light guide plate.

In the preferred embodiment of the present utility model, the far-end away from the LED lamp on this light guide plate is provided with the transmission groove.

In the preferred embodiment of the present utility model, this electronic equipment is a mobile phone.

The technical program is compared with background technology: because the LED lamp makes progress luminous and is radiated at bellmouth, the bellmouth inclined-plane is anti-, refraction and the LED lamp wiring injected light guide plate equably, in order to the illumination button, therefore overcome the existing deficiency of background technology, and have a following advantage: one, simplicity of design, simple shape, easy to process, make simple, be easy to make cheap novel mobile phone keystroke light conducting plate, need not calculate the light path angle of reflection; Its two, brightness height, vision good evenness, brightness and good evenness; Its three, LED lamp usage quantity is few, power consumption is lower; Its four, long service life; Its five, the LED lamp of bottom-emission is more easily purchased, and is easy to install the easier use of mobile phone producer on pcb board; Its six, good evenness can improve the effective utilization of product in other products.Because taper hole is circular taper hole or many prismatics taper hole, drift angle is the 70-100 degree, therefore can make the LED lamp wiring inject light guide plate as far as possible.Owing to stick light-shielding sheet on top, LED lamp position, therefore can prevent that the LED lamp wiring that makes progress luminous is too strong, can prevent that light refraction from going out light guide plate, can be with light reflected back light guide plate.Because the far-end away from the LED lamp on the light guide plate is darker, therefore establish the transmission groove at this place, light is transmitted on the button on the transmission groove.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 has illustrated the schematic rear view of the key light guide device of a preferred embodiment.

Fig. 2 has illustrated the front schematic perspective view of the key light guide device of a preferred embodiment.

Fig. 3 has illustrated the generalized section of the key light guide device of a preferred embodiment.

Embodiment

A kind of mobile phone push-button light guiding device is please referred to Fig. 1, Fig. 2 and Fig. 3, and it comprises a light guide plate 10, two LED lamps 20 and two light-shielding sheets 30.

This light guide plate 10 is positioned on the pcb board, and its shape, size and pcb board are adaptive.This light guide plate 10 offers the button through hole 11 of a plurality of adaptive mobile phone keys, and these light guide plate 11 bottom surfaces also offer two up-small and down-big taper holes 12.This taper hole 12 is the taper hole 12 of sphere or taper shape or triangular taper or rectangular pyramid shape or pentagonal pyramid shape, and these taper hole 12 drift angles are the 70-100 degree.As required, these two taper holes 12 are symmetrically distributed on light guide plate 10 diagonal.

These two LED lamps 20 all are located on the pcb board.And this each LED lamp 20 lays respectively at the just following and upwards luminous of each taper hole 12.

These two light-shielding sheets 30 all card are located at light guide plate 10 end faces.And this each light-shielding sheet 30 covers respectively establishes just going up of each taper hole 12.

Far-end (location far away) away from LED lamp 20 on the above-mentioned light guide plate 10 is provided with two leaded light zones 13, and wherein, a leaded light zone 13 is provided with transmission groove 14, and this transmission groove is circle or v-depression, in order to transmitted ray.

The leaded light principle of the technical program is: the LED lamp makes progress luminous and is radiated at bellmouth on the pcb board, and the bellmouth inclined-plane is anti-, refraction and the LED lamp wiring injected light guide plate equably.More light transmits light guide plate place (taper hole 12 is just being gone up) and sticks light-shielding sheet above the LED lamp, so that this part regional light reflected back light guide plate reduces this part regional brightness.Light advances in light guide plate, and part reflects light guide plate, illuminates button, and part is advanced forward by total reflection.Distance L ED lamp is less than the light that the territory, far field reflects light guide plate, and brightness is lower, therefore does a little transmission grooves in this zone, and these transmission grooves can destroy the total reflection of light, make the light of total reflection transmit light guide plate, to increase the brightness of this part.

The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented with this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1. electronic equipment key light guide device, it is connected pcb board, it is characterized in that: it comprises:

One light guide plate, it offers the button through hole of adaptive electronic equipment button, and this bottom surface of light guide plate offers up-small and down-big taper hole; And

With the LED lamp of number such as taper hole, they all are located on the pcb board, and, this each LED lamp lay respectively at each taper hole just down and upwards luminous.

2. a kind of electronic equipment key light guide device according to claim 1 is characterized in that: this bottom surface of light guide plate offers two up-small and down-big taper holes.

3. a kind of electronic equipment key light guide device according to claim 1, it is characterized in that: this taper hole is circular taper hole.

4. a kind of electronic equipment key light guide device according to claim 1, it is characterized in that: this taper hole is many prismatics taper hole.

5. according to claim 3 or 4 described a kind of electronic equipment key light guide devices, it is characterized in that: this taper hole drift angle is the 70-100 degree.

6. according to claim 1 or 2 or 3 or 4 described a kind of electronic equipment key light guide devices, it is characterized in that: also comprise:

With the light-shielding sheet of number such as taper hole, each light-shielding sheet all card be located at the light guide plate end face and respectively lid establish each taper hole.

7. according to claim 1 or 2 or 3 or 4 described a kind of electronic equipment key light guide devices, it is characterized in that: be provided with transparent plastic portion in this light guide plate.

8. a kind of electronic equipment key light guide device according to claim 7, it is characterized in that: the far-end away from the LED lamp on this light guide plate is provided with the transmission groove.

9. according to claim 1 or 2 or 3 or 4 described a kind of electronic equipment key light guide devices, it is characterized in that: this electronic equipment is a mobile phone.