CN101630034A

CN101630034A - Light guide film surface light source component

Info

Publication number: CN101630034A
Application number: CN200810068538A
Authority: CN
Inventors: 禹明德; 刘恩国
Original assignee: Tianjin Junlongda Trading Co Ltd
Current assignee: Tianjin Junlongda Trading Co Ltd
Priority date: 2008-07-16
Filing date: 2008-07-16
Publication date: 2010-01-20

Abstract

The invention is applicable for the field of personal computers (comprising notebooks) and learning machines, and mainly relates to a surface light source component of a keyboard for emitting light in the darkness. The surface light source component utilizes lateral surfaces of an optical film to collect light from side LED lamps, scatters and refracts the light at a microstructure processing position by utilizing a principle that the light is totally reflected in the optical film, and improves and changes the luminance of different parts by density and depth processing of a microstructure of a film panel, so that the integral brightness and the uniformity of keys are regulated. The surface light source component has the following advantages that: the light is transmitted to a light guide film from an LED light source and is emitted from a micro-structural light emergent area (a total reflection principle violating area) of the light guide film to illuminate a numeric keypad of the keyboard, so a computer can be better used in the darkness, and the computer is also decorated and beautified while improving application functions; and the surface light source component increases convenience for the operation and aesthetic properties of the computer.

Description

Light guide film surface light source component

[technical field]

The utility model is applicable to computer PC (comprising notebook computer), learning machine field, relates generally to a kind of keyboard illuminating area source assembly under dark surrounds.

[background technology]

At present, the base computer on the market, notebook computer, learning machine product consider seldom to allow product button when dark surrounds be convenient to operate and adopt luminous by strong as mobile phone that main cause is not have the suitable technique solution.The only a few high-end notebook PC is considered this demand of user, the scheme of once attempting adopting digital phosphor lacquer technology or keyboard to lay LEDs surplus in the of 40 down solves, but owing to these two kinds of technical schemes all have very big drawback: more weak being difficult to of the wear-resisting wiping of digital phosphor lacquer popularized, structurally design difficulty height, optics light leak defective were difficult to overcome LEDs, power consumption simultaneously is big, the cost height surplus keyboard down laid 40.The rise of the wide source technology of EL afterwards, this demand is brought into schedule once more, but flows firefly once more because the problem of cost and circuit laying structure can't be gone beyond.Therefore for large area electron button field provide a kind of implement simple, luminous evenly, ultrathin, area source scheme product with low cost, be a kind of actual functional capability demand of hommization all the time.

The utility model is that a kind of that the LED pointolite is converted into the button field is adaptable, can overcome the light guide film surface light source component of appeal shortcoming and can be applied to the area source product of large area region.

[utility model content]

The purpose of this patent be for large area electron button field provide a kind of implement simple, luminous evenly, ultrathin, area source scheme product with low cost, thereby design this light guide film surface light source component that can number LED lamp pointolites be converted into area source.

This patent is collected the light of side view LED lamp with the optics side surface of thin film, utilize total reflection principle and microstructure processing place of light in optical thin film to carry out astigmatism and refracted ray, and the density and the advanced treating of the microstructure by film face-plate improve and change the briliancy of different parts, thereby guarantee button overall brightness and uniformity coefficient.

The beneficial effect of this patent is, be communicated to light guiding film by the LGD light source, light guiding film microstructure output optical zone (total reflection principle destroyed area) sends radiance, illuminate the numeric keypad of keyboard, can allow computer better use, also play when improving application function and decorate and the effect that beautifies computer at the dark place.For operation has increased convenience and aesthetic property.

[description of drawings]

Fig. 1 is a this patent computor-keyboard light guide film module structure;

Fig. 2 is the plane leaded light refraction synoptic diagram of this patent keyboard light guide film module;

Fig. 3 is the cross section light path synoptic diagram of this patent keyboard light guide film module;

Fig. 4 is two kinds of product appearance figure of this patent keyboard light guide film module;

Fig. 3 is 2. part figure among Fig. 1;

Among Fig. 1-Fig. 4 the residing structure of leaded light product, 1.--keyboard; 2.--light guiding film (LGF); 3.--film circuit board; 4.--notebook computer shell; 5.--the microstructure output optical zone; 6.--light-leading film; 7.--the LED lamp

[embodiment]

This patent key light guide film assembly is applied in the Computer key, is example with the illumination of notebook keyboard.See also Fig. 1 Fig. 2 and Fig. 3, this keyboard light-leading film assembly (comprise light-leading film 6., the microstructure output optical zone 5.) by absorbing led light source light 7., and make light light-leading film 6. in the conduction, light in the conduction of light-leading film in 6. as shown in Figure 3, be the light wave shape and carry out the total reflection propagation, thereby guarantee light is delivered to far-end under few situation of scattering and disappearing, and disperse out uniformly 7. sentencing the density that needs at each microstructure exiting surface, thereby illuminate computer by strong character area.

6. light-leading film adopts special optical polycarbonate (Polycarbonate) or special optical polymethylmethacrylate (Polymethyl-Methacrylate), and thickness is at 0.08-0.3mm, and its microstructure exiting surface adopts precision die to be made.

Claims

1. computor-keyboard or learning machine keyboard light guide film surface light source component, the exiting surface that this assembly has incidence surface and links to each other with incidence surface, LED light carries out the total reflection propagation with the conduction that is similar in the optical fiber film after incidence surface (light-leading film side) enters light-leading film, a plurality of and the corresponding figure of button site distributes on this exiting surface, this figure forms light state because of the total reflection condition that has destroyed film surface, guarantee that by the density degree of adjusting figure integral layout goes out uniformity of light, and then illuminate the Computer key character zone.It is characterized in that: light-leading film is after LED light enters in the described assembly, luminous energy is conducted in light source film inner total reflection refraction, and under the button of conduction, emit from the microstructure exiting surface, and illuminate button need light-emitting zone, improve brightness and the evenly requirement of astigmatism thereby reach.This light-leading film adopts special optical polycarbonate (Polycarbonate) or special optical polymethylmethacrylate (Polymethyl-Methacrylate), and thickness is at 0.08-0.3mm.

2. according to claim 1, it is characterized in that light-leading film design have microstructure exiting surface, this exiting surface be positioned at button need light-emitting zone below.

3. as described in claim 1 and the claim 2, the microstructure that it is characterized in that the microstructure exiting surface is that figure line or site composite design form, and forms the dimpled grain figure in light-leading film.

4. as described in claim 1 and the claim 2, it is characterized in that the microstructure figure line of microstructure exiting surface or site are inconsistent because of the density degree that the distance of distance light source designs, near zone from light source can be designed thinlyyer, zone far away from light source can be designed closelyer, thereby it is consistent making far and near amount of light, guarantees the homogeneity of optical brightness with this.

5. according to claim 1, it is characterized in that light-leading film adopts special optical polycarbonate (Polycarbonate) or special optical polymethylmethacrylate (Polymethyl-Methacrylate), thickness is between 0.08-0.3mm.