CN200997044Y

CN200997044Y - Optical engine with display mode inter-switching function

Info

Publication number: CN200997044Y
Application number: CN 200620162541
Authority: CN
Inventors: 简彬; 周俊杰; 徐正旺; 游晓林
Original assignee: SVA OPTICAL DISPLAY TECHNOLOGIES Co Ltd
Current assignee: SVA Information Industry Co., Ltd.
Priority date: 2006-12-30
Filing date: 2006-12-30
Publication date: 2007-12-26
Anticipated expiration: 2016-12-30

Abstract

An optical engine with mutual switching function of display mode is provided, which comprises a lighting system, an image processor, a projection objective and a switching objective. The utility model is characterized in that: the switching objective (11) is added to the back of the projection objective (10).

Description

Light engine with the mutual handoff functionality of display mode

Technical field:

The utility model relates to the display technique field, particularly a kind of light engine with the mutual handoff functionality of display mode.

Background technology:

The display technique develop rapidly shows that product is by traditional simulating signal display mode striding forward to the digital signal display mode.The display device of Chu Xianing has in the market: CRT (cathode-ray picture tube), LCD (LCD), PDP (plasma display), digital projection display.Wherein throwing the digital projection display can be divided into: crystal projection (LCD projection), LCOS (Liquire projection, DLP projection (digital light shows projection).DLP projection, crystal projection and LCOS projection all are made up of illuminator, image processor and projection objective three big functional modules, can be divided into 16:9 and 4:3 according to image display mode.

Most back projection photo engines adopt the 16:9 display mode of the effect and the visual impact that more can fully show wide shadow curtain film.But the traditional field of the inapplicable 4:3 display mode of the display mode of 16:9, as: large screen television wall display system, the demonstration of Industry Control terminal, point duty surveillance, large stadium surveillance and education display device.Therefore, the projection light engines of 4:3 display mode still possesses the very large market demand.

Because the projection video picture chip area of the 4:3 projection video picture chip area of same size and 16:9 is different, thus parameter of optical system as: chip size, light tunnel parameter, projection objective parameter are all different.The light engine that manufactures and designs new 4:3 projection mode need drop into the expense and the time of design, die sinking, manufacturing.Therefore we need badly and want a kind of light engine that can realize two kinds of mutual handoff functionalities of display mode.

The utility model content:

The purpose of this utility model provides a kind of light engine with the mutual handoff functionality of display mode, comprises (DLP, LCD, LCOS, etc. Projection Display light engine).Mainly solve existing light engine and be not easy to realize two kinds of display modes technical matters of switching mutually, make things convenient for the user, saved cost.

Solve the problems of the technologies described above, the technical solution of the utility model is:

A kind of light engine with the mutual handoff functionality of display mode, it is made up of high-pressure sodium lamp 1, colour wheel 2, optical wand 3, first illuminating lens 4, second illuminating lens 5, catoptron 6, relay lens 7, prism group 9, DMD (digital micro-mirror display device) 8, projection objective 10, wherein high-pressure sodium lamp, square rod, first illuminating lens, second illuminating lens, catoptron, relay lens are formed illuminator, and DMD (digital micro-mirror display device), prism group, projection objective are formed imaging system.

It is characterized in that: the back of projection objective increases switching object lens.

This light tunnel is shaped as hollow truncated rectangular pyramids.

These switching object lens are fixed to the web member on the projection objective.

Progressive effect of the present utility model is:

The utility model increases switching object lens by the back at projection objective and has realized that 16:9 and 4:3 display mode switch mutually, have widened the range of application of ray machine.This is one only need slightly make an amendment the economy that just can realize on the basis of original ray machine, the method for material benefit,

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a 16:9 display mode optical imagery synoptic diagram.

Fig. 3 is a 4:3 display mode optical imagery synoptic diagram.

Fig. 4 is the utility model 4:3 display mode optical imagery synoptic diagram (increases and switch object lens).

Among the figure:

The 1-high-pressure sodium lamp; The 2-colour wheel;

3-light tunnel; 4-first illuminating lens;

5-second illuminating lens; The 6-catoptron;

The 7-relay lens; 8-DMD;

The 9-TIR prism; The 10-projection objective;

11-switches object lens; The 12-screen;

Q1-DMD4:3 does not use the zone; The actual use of Q2-DMD4:3 zone;

Q3-4:3 image projection viewing area.

Embodiment:

Consult Fig. 1, it is the light engine structural representation that the utlity model has the mutual handoff functionality of display mode.As shown in the figure: this light engine is made up of optical elements such as high-pressure sodium lamp 1, colour wheel 2, light tunnel 3, first illuminating lens 4, second illuminating lens 5, catoptron 6, relay lens 7, TIR prism 9, DMD8 (digital micro-mirror display device), projection objectives 10.Wherein high-pressure sodium lamp 1, light tunnel 3, first illuminating lens 4, second illuminating lens 5, catoptron 6, relay lens 7 are formed illuminator, DMD 8 (digital micro-mirror display device), prism group 9, projection objective 10 are formed imaging system, increase switching object lens 11 in the back of projection objective 10.Rotation colour wheel 2 provides the illumination light of R, G, 3 kinds of colors of B (red, green, orchid).Illumination light sees through projection objective 10 backs and forms coloured image through DMD 8 reflections.

See Fig. 2,16:9 display mode under, dmd chip uses whole pixels.Figure 3 shows that the switching signal of display mode from 16:9 to 4:3, but brought two negative effects.Under the display mode of 4:3, zone line Q2 pixel on the usage level direction.Lost the luminous energy of not using regional Q1 zone pixel.Secondly DMD only uses center section Q2, has reduced projection picture size, causes the photo engine projection than diminishing.The image that reaches same size need increase projector distance.Projection is than defining: the ratio of projector distance and projected image size

For fear of the loss of brightness, improve utilization ratio of optical energy, the illumination hot spot is diminished, only be radiated at the middle part of using of DMD.Like this gross energy of original hot spot is concentrated on the DMD center section.Avoid the loss of luminous energy.The brightness of image can reach the degree before projection mode changes.

In order to utilize high-pressure sodium lamp emergent light energy as much as possible, need optical wand 3 following modifications: light tunnel shape is leant on by hollow four ribs originally and is changed hollow truncated rectangular pyramids into, still adopt original internal reflected mode, the catercorner length of new light tunnel truncated rectangular pyramids light entrance face (upper bottom surface) is consistent with former smooth tunnel catercorner length; New light tunnel light-emitting window sectional dimension must be mated with illuminator, and design is satisfied luminous energy and evenly distributed and maximum utilization ratio principle.

Projector distances such as realization wait the mode switch (see figure 4) of throwing ratio, and the projection objective 10 that the utility model utilization is original increases the projection ratio that switching object lens 11 increase total system in the back of projection objective 10, waits the mode switch of projection ratio.Also can design the switching object lens that the projection ratio is regulated in realistic application, realize the non-mode switch that waits the projection ratio according to practical situations.

In order to realize this scheme, following structural member need be done corresponding modification.

A) light tunnel 8 mounting brackets

B) the fixing elastic clip of light tunnel 8

C) newly switch object lens 11 and be fixed to web member on original projection objective 10.

Identical principle also can switch to 16:9 to the 4:3 projection mode.

Being preferred embodiment of the present utility model only in sum, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be technology category of the present utility model.

Claims

1, a kind of light engine with the mutual handoff functionality of display mode, it is made up of illuminator, image processor, projection objective and switching object lens, it is characterized in that: the back of projection objective (10) increases switching object lens (11).