CN102338977A

CN102338977A - Multicolor pulse light emitting diode (LED) light source and camera prepared by same

Info

Publication number: CN102338977A
Application number: CN2010102856210A
Authority: CN
Inventors: 吴小平; 罗天珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-22
Filing date: 2010-07-20
Publication date: 2012-02-01

Abstract

The invention discloses a multicolor pulse light emitting diode (LED) light source and a camera prepared by the same. The light source comprises an LED light emitting part, a light field clearing lens, a surface type substrate, a reducing (or isometrical) integrator rod (required to be used in a strict parallel light field) and the like; focusing LED light emitting parts of a curved surface type substrate form a public focal point and integrator rod clearing light field type light source structure; an LED light source with higher efficiency and higher power can be developed through pulse red, green and blue (RGB) time-sharing light-emitting processing; and the light source and the camera can be widely applied to digital light processing (DLP)/liquid crystal display (LCD)/liquid crystal on silicon (LCOS) projectors.

Description

Polychrome pulse led light source and with its made video camera

The invention belongs to the sub-technical applications of opto-electronic ignition system; Definite says it is a kind of led light field apparatus for shaping.

For the led light source, because the power of single wafer is limited, dot matrix is arranged the area source state that just causes multiple spot to distribute, thereby the efficiency of light energy utilization is not and be difficult for high brightnessization.

The objective of the invention is to solve the weak point of prior art; Mode with RGB timesharing pulse is luminous, takes interleaved to distribute the row of LED wafer on not, and 3/4 look (contains white during 4 looks; Even more multi-colored led) arrange with on the type substrate; The applicating geometric optical principle, optical field distribution quality and brightness improve greatly, can be widely used in the various occasions.

Characteristics of the present invention: the time with curved surface face type substrate and integrating rod (that is optical rod) arrangement light field; Can reduce the insertion loss, for the simplification of projector's light path creates favorable conditions.

Key problem in technology of the present invention:

Polychrome pulse led light source is made up of led luminescent wafer, light field arrangement lens, face type substrate etc.; Basic functional principle is: when exciting the led luminescent wafer luminous; Because the semiconductor light emitting district can be regarded as approximate pointolite; Each pointolite is after the arrangement of light field arrangement lens; Or become parallel rays or become and converge light (focus is arranged), face type substrate be used for fixing led luminescent wafer and lens (led and lens can be 1 bodyizatioies, and plane face type substrate can make led be arranged in plane distribution; Curved surface face type substrate can make led be arranged in the curved surface distribution); The reducing integrating rod can be used for further putting in order light field (obtaining the better depth of parallelism) again when being necessary, the led array that curved surface is arranged can make all focus points overlap, and the led array of planar alignment line focus lens again makes all light focusings (when the type substrate is the plane face to face; Can obtain to converge again after the parallel surface light source; When the type substrate is sphere, can directly obtain to converge light source face to face, be installed in the ray machine easily); Its technological characteristic just is: the curve focusing light-source structure is: the led luminescent wafer (containing lens subassembly) of a plurality of focus types is installed on the inside surface of curved surface face type substrate (or on planar substrates); The luminous focus of all independent led all coincides together; Form public focus (use lens focus again when adopting planar substrates, integrating rod can be put light field again in order in case of necessity); The LED wafer of RGBS three looks is staggered arranging on face type substrate; The illumination mode of LED of all kinds monochromatic pulsed illumination mode or secondary color pulsed illumination mode in turn.

Obviously; Polychrome pulse led light source projector is made up of polychrome pulse led light source, ray machine light path and electronic circuit etc. naturally; Basic functional principle is: when polychrome pulse led light source stimulated luminescence, the associated treatment through light path and circuit part changes into projected image light, is throwed away by camera lens; Its characteristic just is: in projector, used polychrome pulse led light source; The driving rhythm and pace of moving things (sequential) of the picture material of the pixel light valve device (LCD/DLP/LCOS) that projector is inner is synchronous with the pulsed illumination mode (monochromatic pulsed illumination mode or secondary color pulsed illumination mode in turn) of the led light source of present technique.

That replenishes says: the basic composition that constitutes the structure of the present invention's technology is by led luminescent wafer, light field arrangement lens (optional appliance), the face type substrate (supporting member that is used for fixing the led wafer; The led wafer can directly be processed above that, also can make to be installed in the independent led device that processes again on the face type substrate), composition such as reducing (or isometrical) integrating rod (when needing strict parallel light field with reducing); Basic functional principle is: for obtaining the focused light source structure be: when exciting the led luminescent wafer luminous; Because the semiconductor light emitting district can be by the approximate pointolite of regarding as; Each pointolite is after lens arrangement light field; Or become parallel rays or become and converge light, face type substrate be used for fixing led luminescent wafer and lens (led and lens can be 1 bodyizatioies, and plane face type substrate can make led be arranged in plane distribution; Curved surface face type substrate can make led be arranged in the curved surface distribution); The reducing integrating rod can be used for further putting in order light field (to obtain the better depth of parallelism) again when being necessary; The led array that curved surface is arranged can make all focus points overlap; The led array of planar alignment can be again makes all light focusings (when the type substrate is the plane, can obtain to converge after the parallel surface light source through the lenslet before the led wafer separately, when the type substrate is sphere face to face face to face through (a big unification) condenser lens again; Can directly obtain to converge light source (focusing on the light that lenslet converges led wafer separately), be installed in the ray machine easily); Another kind of situation is before the led luminescent wafer, to insert a plurality of integrating rods (can be corresponding one by one), gets in the optical channel of projector after the arrangement light field again, generates image light through light valve device and throws away; Thereby (can obtain 2 kinds of light source Internal Spherical Surface (and plane/lens) focus type and integrating rod arrangement light field type); Its characteristic just is: the curve focusing light-source structure is: the led luminescent wafer (containing lens subassembly) of a plurality of focus types is installed on the inside surface of curved surface face type substrate (or on planar substrates); The luminous focus of all independent led all coincides together, and forms public focus (using lens focus when adopting planar substrates again); Another kind of integrating rod arrangement light field type light-source structure is: being installed in by a plurality of independently (isometrical or reducing) integrating rod on the light-emitting area of (led dot matrix) lip-deep each led luminescent wafer of face type substrate (can be the integrating rod (small bore end) of each independent (the small size end of integrating rod is separated from one another); And (independence) led luminescent wafer district of independent coupling is the led wafer and the corresponding one by one coupling scheme of integrating rod; Also can be that integration cluster and led light-emitting area that integrating rod (the small size end comes in close proximity to each other or closely is arranged in together) is formed are left certain distance; Be the gap coupling scheme); The light that is coupled is again by the other end outgoing (exit end of integrating rod (can be the larger cross-section end) can be compact arranged) of integrating rod; The sectional area of each integrating rod can be prismatic, also can be the minimum exit end of incident end section maximum (helping the depth of parallelism improves); The light that has integrating rod to derive can directly get into and use in the light path also and can use through another level laser rod arrangement back again; One to one under the situation of direct coupling system, can (greatly) face type substrate boundling of the led dot matrix that disperses be become less light-emitting area (and good light distribution solid angle is arranged) for integrating rod and led wafer.

Above-mentioned integrating rod can be that solid medium composition also can be the hollow pipeline that is surrounded by medium; The surface of integrating rod can be that the natural surface of medium also can be the surface that is covered with other dielectric layers.

(same LED pixel is drawn) each root integrating rod can be single composition, also can be many complex.

When the focus point of the light of focusing such as RGB is mapped to the main optical rod (be used for transmitting and mix light to use the homogeneity on mouthful square better) of ray machine light path, derive by main optical rod; This moment, the colour wheel device can save, because of the RGB timesharing is sent.

[Fig. 1] curved surface face type substrate focused light source (section) structural representation.

Illustrate:

(10) (sphere shape) face type substrate

(11) led luminescent wafer

(12) condenser lens

(13) focused ray

As shown in Figure 1:

The dot matrix that numerous led luminescent wafers (11) are formed is arranged on the surface of (sphere shape) face type substrate (10); All there is a condenser lens (12) front of each led luminescent wafer; (12) focus also just, the centre of sphere of sphere point, thereby focused ray (13) focuses on the centre of sphere jointly.This light source can be directly as in the light path of present projector.

Fig. 1 can arrange the wafer of three kinds of colors of RGB, the white light after hybrid.

This figure is sectional view (cuing open along axis of symmetry); The quantity and the distributing position of the RGB of LED and color such as white, satisfy colorimetry mechanism: green most energy, redness is taken second place; Blue minimum; On arranging preferably RGB evenly be intervally arranged as far as possible, when RGB timesharing pulsed illumination, the consistance of the light field between the monochrome is best.

Claims

1. polychrome pulse led light source is made up of led luminescent wafer, light field arrangement lens, face type substrate etc.; Basic functional principle is: when exciting the led luminescent wafer luminous; Because the semiconductor light emitting district can be regarded as approximate pointolite; Each pointolite is after the arrangement of light field arrangement lens; Or become parallel rays or become and converge light (focus is arranged), face type substrate be used for fixing led luminescent wafer and lens (led and lens can be 1 bodyizatioies, and plane face type substrate can make led be arranged in plane distribution; Curved surface face type substrate can make led be arranged in the curved surface distribution); The reducing integrating rod can be used for further putting in order light field (obtaining the better depth of parallelism) again when being necessary, the led array that curved surface is arranged can make all focus points overlap, and the led array of planar alignment line focus lens again makes all light focusings (when the type substrate is the plane face to face; Can obtain to converge again after the parallel surface light source; When the type substrate is sphere, can directly obtain to converge light source face to face, be installed in the ray machine easily); Its characteristic just is: the curve focusing light-source structure is: the led luminescent wafer (containing lens subassembly) of a plurality of focus types is installed on the inside surface of curved surface face type substrate (or on planar substrates); The luminous focus of all independent led all coincides together; Form public focus (use lens focus again when adopting planar substrates, integrating rod can be put light field again in order in case of necessity); The LED wafer of RGBS three looks is staggered arranging on face type substrate; The illumination mode of LED of all kinds monochromatic pulsed illumination mode or secondary color pulsed illumination mode in turn.

2. polychrome pulse led light source projector is made up of polychrome pulse led light source, ray machine light path and electronic circuit etc.; Basic functional principle is: when polychrome pulse led light source stimulated luminescence, the associated treatment through (main optical rod) light path and circuit part changes into projected image light, is throwed away by camera lens; Its characteristic just is: in projector, used polychrome pulse led light source; The driving rhythm and pace of moving things (sequential) of the picture material of the pixel light valve device (LCD/DLP/LCOS) that projector is inner is synchronous with the pulsed illumination mode (monochromatic pulsed illumination mode or secondary color pulsed illumination mode in turn) of the led light source of present technique.