CN201803129U

CN201803129U - LED light source

Info

Publication number: CN201803129U
Application number: CN2009202229363U
Authority: CN
Inventors: 邹镇中; 叶新林; 刘新斌; 刘建军
Original assignee: Beijing Irtouch Systems Co Ltd; Beijing Unitop New Technology Co Ltd
Current assignee: Beijing Irtouch Systems Co Ltd; Beijing Unitop New Technology Co Ltd
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2011-04-20
Anticipated expiration: 2019-09-25

Abstract

The utility model discloses an LED light source, which includes an LED array, a convex lens and a concave lens, wherein the convex lens is arranged between the LED array and the concave lens. The light source comprising the LED array, the convex lens and the concave lens is used for providing optical radiation, so that the luminous intensity and the light distribution of the light source are greatly improved, and the light source requirements of a large-size touch screen or an electronic whiteboard can be met.

Description

A kind of led light source

Technical field

The utility model relates to light sources technical field, particularly a kind of led light source.

Background technology

Development along with multimedia information technology, people use human-computer interaction devices such as touch-screen and electronic whiteboard more and more, touch-screen and electronic whiteboard based on optical technology have obtained application more and more widely, the light source conduct is based on the important component part of the touch-screen and the electronic whiteboard of optical technology, its luminous intensity and light distribution have certain influence to the positional accuracy of touch-screen and electronic whiteboard, and it is traditional by single or multiple LED (light emitting diode, light emitting diode) luminous intensity of the light source of Gou Chenging is less, the light distribution zone is also less, can't satisfy large scale touch-screen and electronic whiteboard to the luminous intensity of light source and the requirement of light distribution.

The utility model content

The purpose of this utility model be to provide a kind of luminous intensity reach by force light distribution big touch led light source, to overcome weak point of the prior art.

By a kind of led light source of this purpose design, it includes led array, convex lens and concavees lens, and wherein convex lens are between led array and concavees lens.

The utility model provides light radiation by the light source that is made of led array, convex lens and concavees lens, and the luminous intensity of this light source and light distribution are significantly improved, and can satisfy the requirement to light source of large scale touch-screen or electronic whiteboard.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the utility model or prior art, to do to introduce simply to the accompanying drawing of required use in the utility model or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the schematic diagram of the utility model a kind of application scenarios of the prior art;

Fig. 2 is the structural representation of a kind of led light source among the utility model embodiment one;

Fig. 3 is the structural representation of a kind of led light source among the utility model embodiment two;

The specific embodiment

Among the utility model embodiment, all can reach goal of the invention of the present utility model.

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme in the utility model is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

As shown in Figure 1, schematic diagram for the utility model a kind of application scenarios of the prior art, light source 101 and light source 102 lay respectively on two angles at an edge of frame 103 of touch-screen or electronic whiteboard, there is a common edge at light source 101 and angle, light source 102 place, and light source 101 and light source 102 are used to provide light radiation to shine whole touch area 104.

As shown in Figure 2, be the structural representation of a kind of led light source among the utility model embodiment one, this led light source includes led array 203, convex lens 201 and concavees lens 202, and wherein convex lens 201 are between led array 203 and concavees lens 202.Convex lens 201 are used for the light that led array 203 sends is converged; Light after concavees lens 202 are used for planoconvex lens 201 converged is dispersed, and produces the light that meets application scenarios light distribution requirement; Led array 203 is used to produce light, and this led array can be made of infrarede emitting diode, also can be made of visible light emitting diode.This led light source can also comprise a reflector 204, is used for the light that led array sends is reflected, and the light after the use reflection can make the utilization rate of optical radiation energy higher towards convex lens like this, and this reflector 204 is a concave mirror.As a kind of preferred implementation, in this led light source, the primary optical axis of convex lens 201 and concavees lens 202 overlaps fully, and led array 203 is over against convex lens 201.

As shown in Figure 3, be the structural representation of a kind of led light source among the utility model embodiment two.The difference of embodiment two and embodiment one is that embodiment two is equipped with first level crossing 301 between led array 203 and convex lens 201, be equipped with second level crossing 302 between described convex lens 201 and concavees lens 202.Convex lens 201 are used for the light that the led array 203 through 301 reflections of first level crossing sends is converged; Light after concavees lens 202 are used for the convex lens 201 through the reflection of second level crossing 302 are converged is dispersed, and produces the light that meets application scenarios light distribution requirement; Led array 203 is the same with situation about implementing in two, has not just repeated at this; First level crossing 301 is used for the light that led array 203 sends is reflexed to convex lens 201; Light after second level crossing 302 is used for planoconvex lens 201 converged reflexes to concavees lens 202; This led light source can also comprise a reflector 204, is used to reflect the light that led array 203 sends, so that the optical radiation energy utilization rate is higher, this reflector 204 is a concave mirror.As a kind of preferred implementation, in this led light source, it is miter angle that plane, led array 203 place becomes angle less in the angle with plane, first level crossing, 301 place, first level crossing 301 and second level crossing 302 are parallel to each other, it is miter angle that the primary optical axis of first level crossing 301 and convex lens 201 becomes angle less in the angle, it is miter angle that the primary optical axis of second level crossing 302 and concavees lens 202 becomes angle less in the angle, and the primary optical axis of convex lens 201 and concavees lens 202 is orthogonal.We also can select to use first level crossing and second level crossing as the case may be in actual applications, promptly can remove any in first level crossing and second level crossing.Also just say and only use a level crossing, or between led array and convex lens, level crossing is installed, and level crossing is not installed between convex lens and concavees lens; Between convex lens and concavees lens, level crossing is installed, and between led array and convex lens, level crossing is not installed.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the utility model is necessary.

Above-mentioned the utility model embodiment sequence number is not represented the quality of embodiment just to description.

More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection domain of the present utility model.

Claims

1. a led light source is characterized in that, this led light source includes led array, convex lens and concavees lens, and wherein convex lens are between led array and concavees lens.

2. led light source as claimed in claim 1 is characterized in that this led light source also includes reflector, and described reflector is used for the light that described led array sends is reflected, and the light after the use reflection is towards convex lens.

3. led light source as claimed in claim 1 is characterized in that the primary optical axis of described convex lens and described concavees lens overlaps fully, and described led array is over against described convex lens.

4. as any one described led light source in the claim 1 to 3, it is characterized in that, between described led array and the convex lens or between described convex lens and the concavees lens level crossing is being installed.

5. as any one described led light source in the claim 1 to 3, it is characterized in that, first level crossing is installed between described led array and convex lens, second level crossing is installed between described convex lens and concavees lens.

6. led light source as claimed in claim 5, it is characterized in that, it is miter angle that plane, described led array place becomes angle less in the angle with plane, the described first level crossing place, described first level crossing and described second level crossing are parallel to each other, it is miter angle that the primary optical axis of described first level crossing and described convex lens becomes angle less in the angle, it is miter angle that the primary optical axis of described second level crossing and described concavees lens becomes angle less in the angle, and the primary optical axis of described convex lens and described concavees lens is orthogonal.

7. led light source as claimed in claim 4 is characterized in that described led array constitutes by infrarede emitting diode or by visible light emitting diode.

8. led light source as claimed in claim 5 is characterized in that described led array constitutes by infrarede emitting diode or by visible light emitting diode.

9. led light source as claimed in claim 6 is characterized in that described led array constitutes by infrarede emitting diode or by visible light emitting diode.

10. as any one described led light source in the claim 1 to 3, it is characterized in that described led array constitutes by infrarede emitting diode or by visible light emitting diode.