CN2896333Y

CN2896333Y - Prism structure of projector lighting system

Info

Publication number: CN2896333Y
Application number: CN 200620004283
Authority: CN
Inventors: 吴昭宪
Original assignee: PULIER SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: PULIER SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2006-03-27
Filing date: 2006-03-27
Publication date: 2007-05-02
Anticipated expiration: 2016-03-27

Abstract

The utility model provides a prism structure that facilitates the illumination system of the projector which is arranged in the projector to receive the light source generated by the light machine and then projects the concentrated light to the DIGITAL MICRO-MIRROR DEVICE, DMD for short, and then the images are projected onto a screen. The main characteristics are that the prism is a tabulate principle, whereon a plurality of joint serrated complex bevels that are arranged; a plurality of joint serrated complex bevels are arrayed in a plurality of groups; through arrangement of such complex bevels, all light sources projected on the bevels can be focused and reflected on the digital reflector device to form images.

Description

The prism structure of projector's illuminator

Technical field

The utility model relates to the prism structure of a kind of projector illuminator, particularly be a kind ofly on a flat board, to be provided with most composite planes with reduced volume and promote the prism structure of light conduction efficiency.

Background technology

By advancing by leaps and bounds of high-tech technology in recent years, especially in the field of microelectronics correlation technique processing procedure, make rapid progress especially, so the electronic correlation product has been embedded in each family and all trades and professions, become some indispensable in the modern life.

Certainly by more and more, make electronic installation must reach the use of greater functionality relatively, and each electronic product more stride forward towards the target of short and small frivolous structure and diversification effect in human wants.In numerous electronic goods, the development of projector and application, also all the more extensively convenient human life.And along with projector's development of technology, projector's product is because volume is little, in light weight, easy to carry, add that the mobile computer performance constantly promotes day by day to increase with sales volume and popularize, and then it is in fashion also to drive the multimedia bulletin.Make script just based on projector's product in office automation (OA) market, following except the consumer electronics market development, also will cut personal computer (PC) market.And the development trend of whole projector product concentrates on functional promotion, price reduction and three directions of volume-diminished.

With the present less relatively DLP projector of volume on the market, its principle is to include shown in figure one: a light source module A (Illuminator Module), a collector lens B (Condenser), a prism group C (Prism Module), a digital micromirror device D (Digital Micro-mirror Device; DMD) and a projection lens group E (Projection Lens Set).The light of being launched from light source module A, earlier after collector lens B assembles, by prism group C light is folded to this digital micromirror device of directive D, after digital micromirror device D reflection and video picture, by prism group C light is folded to projection lens group E once more, and is focused on for being imaged on an extraneous projecting plane F.

This prism group C is a reverse total internal reflection (Reversed Total Internal Reflection; RTIR) prism group, it more includes: one first prism G and one second prism H.This first prism G is arranged on the position of more contiguous collector lens B, and the second prism H then is arranged on the position of more contiguous digital micromirror device D.And this first prism G and the second prism H all be with have predetermined anaclasis be the number transparent material constituted, make the interface of win the prism G and the second prism H upwards become the fully reflecting surface of incident ray at a predetermined angle at folk prescription.That is to say, by aforesaid unique configuration and have the first prism G and the second prism H that predetermined anaclasis is a number, can make the light of injecting the first prism G from collector lens B can penetrate the second prism H and directive digital micromirror device D.Yet,, will carry out total reflection at the interface of the first prism G and the second prism H, and change directive projection lens group E from the image light of the digital micromirror device D reflected back second prism H.

Shown in Fig. 2 A, this first prism G is that it is to be a taper along the cross section that light is passed through on the direction for a prism wedge (Wedge Prism).Six of this wedge shape first prism G table planar I～N are the plane, and respectively show between the plane not parallelly mutually, but are the wedge structure that tilts to connect.Table plane K shows plane N for the plane of incidence of light then to be the exit facet of light.Shown in Fig. 2 A, the delivery position places of four table planar I, J, K and the N of the first prism G have the thinnest thickness (that is table plane K and N in this position nearest), and the delivery position places of four table plane K, L, M and N then have maximum thickness (that is showing plane K and N in the distance of this position farthest).

Shown in Fig. 2 B, the cross section that this second prism M passes through on the direction along light is rectangular triangle, and is to have five table plane P～T.Wherein, table planar S and T be rectangular triangle and be to be parallel to each other, and the table plane P is between the long limit of the table planar S of this two right-angle triangle and T and is the plane of incidence for light.Table plane Q and R then distinguish the position between two vertical edges of table planar S and T, and table plane Q is for vertical mutually with R.The table plane N of this first prism G is to abut in (that is the surface under the long limit of cross section right-angle triangle) on the table plane P of the second prism H.Table plane R that this digital micromirror device D and projection lens group E then are respectively adjacent at the second prism M and Q (that is two surfaces under two vertical edges of cross section right-angle triangle).

Though aforesaid prism group C can reach the effect of total internal reflection, only this is the first prism G of wedge type, by have certain thickness at it, not only takes up space, and can make it produce higher light decay phenomenon in the conductive process of light, influences its light conduction efficiency.Above-mentioned technology just like makes great efforts to overcome the problem of research and development and careful consideration solution for the dealer.

Summary of the invention

Fundamental purpose of the present utility model is: the prism structure of a kind of projector illuminator is provided, a thinner thickness and the higher prism structure of light conduction efficiency are provided.

Secondary objective of the present utility model is the prism structure that is to provide a kind of projector illuminator, by utilizing the method for making of one extrusion modling, can effectively reduce manufacturing cost.

For reaching the technical scheme that above-mentioned purpose utility model adopts be: the prism structure that a kind of projector illuminator is provided, mainly be arranged on a side of close ray machine in the projector, by behind the light source that ray machine produced its optically focused being projected on the digital micromirror device (DMD) accepting, be primarily characterized in that: this prism is the composite bevel that a flat main body is provided with most continuous indentations, and this majority composite bevel is to arrange with some prescription formulas.

Below in conjunction with accompanying drawing, to this novel above-mentionedly is described in more detail with other technical characterictic and advantage.

Description of drawings

Fig. 1 is the optical schematic diagram of existing projector;

Fig. 2 A is the stereo appearance figure of first prism in the existing prism group;

Fig. 2 B is the stereo appearance figure of second prism in the existing prism group;

Fig. 3 is the stereo appearance figure of the utility model preferred embodiment;

Fig. 4 is the floor map of the utility model preferred embodiment;

Fig. 5 is applied in the embodiment synoptic diagram of DLP projector for the utility model.

Reference numeral explanation: A-light source module; The B-collector lens; C-prism group; D-digital minitype reflector dress; E-projection lens group; The extraneous projecting plane of F-; G-first prism; H-second prism; I-N shows the plane; P-T shows the plane; The 1-main body; The 11-composite bevel; The 2-ray machine; The 3-digital micromirror device; 4-prism group; 41-first prism; The 411-main body; The 412-composite bevel; 42-second prism; 5-projection lens group; The extraneous projecting plane of 6-.

Embodiment

See also Fig. 3 and shown in Figure 4, it is stereo appearance figure and the floor map that is respectively the prism structure preferred embodiment of the utility model projector illuminator.The prism structure of the utility model projector illuminator, be arranged on a side of close ray machine in the projector, by behind the light source that ray machine produced its optically focused being projected on the digital micromirror device (DMD) accepting, be primarily characterized in that: this prism is the composite bevel 11 that a flat main body 1 is provided with most continuous indentations, this majority composite bevel 11 is to arrange with some prescription formulas, by the light source that all can be projected on it that is provided with of aforementioned composite bevel 11, give optically focused and project on the digital micromirror device.

In the utility model, described each composite bevel 11, its concrete structure will present prism wedge (Wedge Prism) structure of the similar first prism G shown in Fig. 2 A respectively after amplification.In other words, prism of the present utility model etc. is that flat main body 1 is provided with the first prism G (just composite bevel 11) with many miniaturizations of some prescription formula proper alignment.And, each composite bevel 11 is also as the first prism G shown in figure two A, the delivery position places of four table planar I, J, K and the N on its six table planes (or cross section) have the thinnest thickness (that is table plane K and N in this position nearest), and the delivery position places of four table plane K, L, M and N then have maximum thickness (that is showing plane K and N in the distance of this position farthest).

Design by aforementioned structure, unique prism structure with most composite bevels 11 of the present utility model, compare the first prism G that has certain thickness and gradient existing, not only can reduce its thickness and shared unnecessary space, the reduction by thickness simultaneously can effectively promote the conduction efficiency of light and reduce the optical attenuation phenomenon.

Prism structure of the present utility model, it is to utilize the mode of one extrusion molding to make by transparent material (for example: acryl, plastics or even may be glass etc.), and is not only easily manufactured, quick, and has the effect that reduces manufacturing cost.

Please continue to consult Fig. 5, it is the embodiment synoptic diagram that is applied in DLP projector for the utility model, and this DLP projector mainly is made up of ray machine 2, digital micromirror device 3, prism group 4 and projection lens group 5.Wherein, ray machine 2 is in order to providing projector required light source, and digital micromirror device 3 is can accept the light source of ray machine 2 and whether reflect this light source by it to produce image.In addition, this prism group 4 is arranged between ray machine 2 and the digital micromirror device 3, and it further is made up of one first prism 41 (prism of the utility model original creation just shown in Figure 3) and one second prism 42.Wherein first prism 41 is arranged on a side of comparatively close ray machine 2, and second prism 42 then is located at a side of close digital micromirror device 3.This first prism 41 is composite bevels 412 that a flat main body 411 is provided with most continuous indentations, is incident upon digital minitype reflector 3 back reflections and produces image by assembling with the light source that ray machine 2 is produced.And, be that the interface at first prism 41 and second prism 42 carries out total reflection, and change directive projection lens group 5 from the image light of digital micromirror device 3 reflected backs second prism 42.See through the image that this projection lens group 5 can be produced aforementioned digital micromirror device 3, focused on for being imaged on an extraneous projecting plane 6.

More than explanation is for this is novel just illustrative, and nonrestrictive, those of ordinary skills understand, and under the situation of the spirit and scope that do not break away from following claims and limited, can make many modifications, change, or equivalent.

Claims

1. the prism structure of projector's illuminator, it is arranged on a side of close ray machine in the projector, by behind the light source that ray machine produced its optically focused being projected on the digital micromirror device (DMD) accepting, it is characterized in that this prism is the composite bevel that a flat main body is provided with most continuous indentations.

2. the prism structure of projector according to claim 1 illuminator is characterized in that, this majority composite bevel is to arrange with some prescription formulas.

3. the prism structure of projector according to claim 1 illuminator is characterized in that, this prism is to make to push one-body molded mode.

4. the prism structure of projector according to claim 1 illuminator is characterized in that this prism is made by transparent material.

5. the projector with prism is characterized in that, includes:

One ray machine is in order to provide projector required light source;

One digital micromirror device is to produce image by whether reflecting external light source;

One projection lens group can be focused on the image that digital micromirror device produced for being imaged on an extraneous projecting plane;

One prism group, this prism group is arranged between ray machine and the digital micromirror device, it further is made up of one first prism and second prism, wherein first prism is arranged on a side of comparatively close ray machine, second prism then is located at a side of close digital micromirror device, this first prism is the composite bevel that a flat main body is provided with most continuous indentations, by being incident upon the digital micromirror device back reflection and producing image, see through second prism image is folded to the projection lens group so that the light source that ray machine was produced is assembled.

6. projector according to claim 5 is characterized in that, this majority composite bevel is to arrange with some prescription formulas.

7. projector according to claim 5 is characterized in that, this first prism is to make to push one-body molded mode.

8. projector according to claim 5 is characterized in that, this prism group is made by transparent material.

9. projector according to claim 5 is characterized in that, from the image light of described digital micromirror device reflected back second prism, is that the interface at first prism and second prism carries out total reflection, and changes directive projection lens group.