CN212905879U

CN212905879U - DLP micro-projection optical engine with tower type optical device

Info

Publication number: CN212905879U
Application number: CN202021801218.4U
Authority: CN
Inventors: 曹兴; 刘海朋
Original assignee: Shenzhen Xiaoxiang Light Display Co ltd
Current assignee: Shenzhen Xiaoxiang Light Display Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-04-06
Anticipated expiration: 2030-08-25

Abstract

The utility model relates to a DLP micro-projection optical engine with tower optical device, including the illumination of emergent white light close the optical module, with the white light illumination condenser module that optics was corrected, be used for the RTIR prism module, DMD light modulator and the telecentric projection lens of series connection illumination and projection, the plane at each optical axis place of illumination condenser module, RTIR prism module, DMD light modulator and telecentric projection lens forms the contained angle of 35-60 degrees with the plane at illumination condenser module optical axis place. The utility model solves the problems of poor design stability, difficult assembly process and low production yield of the DMD optical modulator lighting optical design frame in the conventional Corner Manhattan mode; the characteristics of stable structure, reliable design, simple assembly process and high production yield of the telecentric optical design frame of the RTIR prism light combination which is mainly adopted in the market at present are kept.

Description

DLP micro-projection optical engine with tower type optical device

The technical field is as follows:

the utility model belongs to the technical field of the projector and specifically relates to DLP miniature projector field, in particular to DLP miniature projection optical engine and special tower optical system framework thereof.

Background art:

the existing Micro projection optical engine mostly adopts dlp (Digital Light projector) technology of Texas Instruments (TI) in usa, a main image and Light control Device of the Micro projection optical engine is generally called as a DMD (Digital Micro-mirror Device) Light modulator, the DMD Light modulator is a Micro mirror array with extremely high reflectivity, and a picture formed by commonly used R, G, B three primary colors needs to be converted into a projection picture which is easy to see by human eyes by matching with an illumination optical system and a projection optical system; the structure principle is that a very thin high-reflectivity mirror is cut into a micro-mirror array with required resolution quantity, for example, the physical resolution of a DMD optical modulator with the model of 0.2' WVGA is 854 × 480, then the very thin high-reflectivity mirror in the effective working area is cut into a rectangular array (the length-width ratio is 16: 9) consisting of 854 × 480=409920 micro-mirrors, and one micro-mirror is generally called as a pixel; the Texas Instruments (TI) company in America can set different pixel point working modes according to different working environments of the DMD light modulator and market requirements, so that the microstructures and the working deflection modes of the DMD light modulators of different models are different; currently, there are three forms: the "Corner Manhattan" (as shown in FIG. 1), "Side Diamond" (as shown in FIG. 2), and "Side Manhattan" (TRP) modes "(as shown in FIG. 3), while the optical design architecture of DLP technology based optical engines may also be matched and altered due to the differences in DMD optical modulator microstructure and operational deflection modes.

The optical design frameworks adopted by the current market according to different DMD light modulator microstructures and working deflection modes also include the following types: 1. for DMD light modulators of the "Corner Manhattan approach", the optical design framework of DLP technology-based optical engines typically employs a non-telecentric design framework with or without a field lens, as mentioned in, for example, chinese patent CN200910209037 (shown in fig. 4); 2. for the DMD light modulator of the "Side Diamond approach", the optical design framework of the DLP technology-based optical engine generally adopts a telecentric design framework of RTIR prism light combination, as mentioned in chinese patent CN200810184667 (as shown in fig. 5); 3. for DMD light modulators of the "Side Manhattan (TRP) mode", the optical design framework of the DLP technology-based optical engine generally employs a telecentric design framework of TIR prism integration, as mentioned in chinese patent CN200410082036 (see fig. 6);

the common feature of the above three modes is that the optical components are substantially in the same plane, and through the continuous efforts of the optical designer, the telecentric design framework using RTIR prism for combining light, which is generally used in the "Side Diamond mode" DMD optical modulator (as shown in fig. 5), and the telecentric design framework using TIR prism for combining light, which is generally used in the "Side Manhattan (TRP) mode" DMD optical modulator (as shown in fig. 6), can be compatible with each other, but the two telecentric design frameworks using RTIR prism for combining light (as shown in fig. 5) and the telecentric design framework using TIR prism for combining light (as shown in fig. 6) are not compatible with the DMD optical modulator in the "Corner hattan mode" by the designer at present; the situation that each optical design frame is difficult to mutually compatible with DMD light modulators with different microstructures and working deflection modes leads to the increase of design cost and product differentiation caused by micro projection optics based on a DLP technology platform.

The invention content is as follows:

in view of the defects of the prior art, the present invention provides a DLP micro-projection optical engine with a tower-type optical device, which solves the problems of poor design stability, difficult assembly process and low production yield of the conventional DMD optical modulator using a non-telecentric optical design frame with or without a field lens in the conventional Corner Manhattan method; on one hand, the characteristics of stable structure, reliable design, simple assembly process and high production yield of the telecentric optical design frame of the RTIR prism light combination which is mainly adopted in the market at present are kept.

The utility model discloses DLP micro-projection optical engine with tower optical device, its characterized in that: the device comprises an illumination light-combining module for emitting white light, an illumination light-gathering module for optically correcting the white light, an RTIR prism module for serially illuminating and projecting, a DMD light modulator and a telecentric projection lens, wherein the plane where the optical axes of the illumination light-gathering module, the RTIR prism module, the DMD light modulator and the telecentric projection lens are located and the plane where the optical axis of the illumination light-gathering module is located form an included angle of 35-60 degrees.

Furthermore, the plane where the optical axes of the illumination and light-gathering module, the RTIR prism module, the DMD optical modulator and the telecentric projection lens are located and the plane where the optical axis of the illumination and light-gathering module is located form an included angle of 45 degrees.

Further, the illumination and condensation module comprises a reflecting mirror and a relay mirror.

Further, the relay lens is a lens.

Furthermore, the RTIR prism module comprises a right-angled triangular prism with two mutually attached inclined surfaces.

Furthermore, the DMD optical modulator and the reflecting surface of the RTIR prism module are arranged in parallel at intervals.

The utility model discloses a theory of operation and advantage lie in: the conventional optical design system based on the DMD optical modulator (as shown in fig. 1) designed in the "Corner Manhattan method" generally adopts a non-telecentric design frame with or without a field lens, as mentioned in, for example, chinese patent CN200910209037 (as shown in fig. 4), which has the problems of poor stability, difficult assembly process and low production yield; whereas the conventional DMD optical modulator (as shown in fig. 2) based on the "Side Diamond mode" and the "Side Manhattan (TRP) mode" DMD optical modulator (as shown in fig. 3) has the characteristics of stable structure, reliable design, simple assembly process, and high production yield of the telecentric optical design frame currently adopted in the market, but the telecentric optical design frame currently adopted in the market for synthesizing the RTIR prism cannot be directly compatible with the DMD optical modulator (as shown in fig. 1) based on the "Corner Manhattan mode", and no optical design mechanism or company proposes a design scheme for using the telecentric optical design frame currently adopted in the market for synthesizing the RTIR prism to be compatible with the DMD optical modulator (as shown in fig. 1); and the utility model discloses the novelty provides DLP micro-projection optical engine and tower optical system framework thereof, the adoption RTIR prism that has built one can perfectly compatible "Corner Manhattan mode" DMD light modulator closes light, double-deck tower telecentric optical design frame (as shown in figure 7), abandon on the one hand and have the field lens, perhaps do not have the intrinsic poor stability of non-telecentric design frame of field lens, assembly process is difficult, the shortcoming that the production yield is low, perfect the telecentric optical design frame intrinsic stable in structure who has kept the RTIR prism of mainstream adoption closed light on the present market on the one hand, the design is reliable, assembly process is simple, the high characteristics of production yield.

The utility model discloses a DLP micro-projection optical engine and tower optical system framework thereof is based on "Corner Manhattan mode" DMD light modulator development design, traditional having abandoned the field lens that has based on "Corner Manhattan mode" DMD light modulator development design promptly, perhaps do not have the intrinsic shortcoming of non-telecentric design frame of field lens, solved the telecentric optics design frame that the mainstream adopted on the market at present based on "Side Diamond mode" and "Side Manhattan mode" RTIR prism synthetic light of DMD light modulator development design and "the compatible problem of" Corner Manhattan mode "DMD light modulator, brought following beneficial effect:

1. the utility model discloses DLP micro-projection optical engine and tower optical system framework thereof provides the other form of the non-telecentric design frame except traditional having the field lens, or not having the field lens for developing DLP micro-projection optical engine based on "Corner Manhattan mode" DMD light modulator and doing optical design, has greatly enriched the optical design content, has expanded DLP micro-projection optical engine's finished product form;

2. the DLP micro-projection optical engine and the tower type optical system framework thereof of the utility model abandon the problems of poor stability, difficult assembly process and low production yield of the traditional non-telecentric design framework with or without a field lens;

3. the utility model discloses DLP micro-projection optical engine and tower optical system construct and have solved the compatible problem of telecentric optics design frame and "Corner Manhattan mode" DMD light modulator that RTIR prism closed light that present mainstream adopted on the market well;

4. the utility model discloses DLP micro-projection optical engine and tower optical system framework thereof has adopted the RTIR prism that mainstream adopted on the market at present to close telecentric optical design frame of light, and the perfect has kept its inherent stable in structure, and the design is reliable, and assembly process is simple, characteristics that the production yield is high.

Description of the drawings:

FIGS. 1-6 are schematic diagrams of prior art constructions (reference numbers in the figures refer to reference numbers of specific patents);

fig. 7 is a schematic top view of the present invention;

fig. 8 is a rear view configuration diagram of the present invention;

FIG. 9 is an exploded view of the mirror, relay mirror, RTIR prism module;

fig. 10 is a light path diagram of the mirror, relay mirror, RTIR prism module, and DMD light modulator.

The specific implementation mode is as follows:

the method of the present invention will be described in further detail with reference to examples. It should be noted that the protection scope of the present invention should include, but not be limited to, the technical content disclosed in the present embodiment.

The utility model discloses DLP micro-projection optical engine with tower optical device includes that the illumination of emergent white light closes optical module 8-1, carries out the illumination condenser module 8-7 that optics was corrected with the white light, is used for series connection illumination and projected RTIR prism module 8-4, DMD light modulator 8-5 and telecentric projection lens 8-6, illumination condenser module 8-7, RTIR prism module 8-4, DMD light modulator 8-5 and telecentric projection lens 8-6 each optical axis place plane M and the plane N at illumination condenser module optical axis place form the contained angle of 35-60 degrees.

The plane N where the optical axis of the lighting and condensing module is located refers to that the optical axes of the lighting and condensing module for providing R, G, B light sources with three primary colors and synthesizing and outputting white light are located in the same plane N; the plane M where the optical axes of the illumination and condensation module 8-7, the RTIR prism module 8-4, the DMD optical modulator 8-5 and the telecentric projection lens 8-6 are located refers to the optical axis of the illumination and condensation module 8-7 (namely comprising the reflector 8-2 and the relay lens 8-3), the optical axis of the RTIR prism module 8-4 and the optical axis of the DMD optical modulator 8-5 are located on the same optical axis and located on the same plane M with the optical axis of the telecentric projection lens 8-6, and the plane M and the plane N form an included angle of 35-60 degrees.

For better effect, it is preferable that the plane M and the plane N form an included angle of 45 degrees.

The illumination and condensation module 8-7 comprises a reflector 8-2 and a relay lens 8-3, wherein the relay lens can be a spherical lens, an aspherical lens or a lens group; the reflector may be a planar reflector plate or a planar reflector plate.

The RTIR prism module 8-4 includes two right-angled triangular prisms with their inclined surfaces attached to each other or with a certain air gap.

The DMD light modulator 8-5 and the RTIR prism module 8-4 are arranged in parallel at intervals.

The DLP micro-projection optical engine and the tower optical system framework thereof provided by the utility model have the biggest difference from the traditional telecentric design frame for the RTIR prism light combination adopted on the "Side Diamond mode" DMD optical modulator that the optical lens of the traditional telecentric design frame for the RTIR prism light combination adopted on the "Side Diamond mode" DMD optical modulator is basically in one plane, which leads to that the DLP micro-projection optical engine and the tower optical system framework thereof can not be applied to the DMD optical modulator of the "Corner Manhattan mode"; the DLP micro-projection optical engine and the tower optical system framework thereof mentioned in the utility model creatively adjust the optical design framework of the traditional optical lens basically in the same plane into a double-layer tower structure, rotate the illumination beam irradiated on the DMD optical modulator by 45 degrees, and rotate the DMD optical modulator of the 'Corner Manhattan mode' by 45 degrees, thereby adjusting the optical system of the 'Side Diamond mode' DMD optical modulator which can only irradiate the illumination beam from the right back of the tail and needs to irradiate the illumination beam from the right back of the tail into a double-layer tower telecentric optical design framework (as shown in figure 7) adopting RTIR prism light for the 'Corner Manhattan mode' DMD optical modulator which needs to irradiate the illumination light from the oblique 45 degrees on one hand, the double-layer tower optical system framework avoids the adoption of the inherent design stability of the non-telecentric optical design framework with field lens or without field lens on the other hand, the assembly process is difficult, and the production yield is low; on one hand, the characteristics of stable structure, reliable design, simple assembly process and high production yield of the telecentric optical design frame of the RTIR prism light combination which is mainly adopted in the market at present are kept.

The utility model provides a DLP micro-projection optical engine and adopt double-deck tower telecentric optics design frame of RTIR prism closed Light thereof mainly is to the DMD Light modulator of "Corner Manhattan mode" that development under the DLP (digital Light projector) technical platform of U.S. Texas Instruments (TI) company and the design of optimizing very much, and its main technical characterstic and technological advantage all only produce to the DMD Light modulator of "Corner Manhattan mode".

The utility model provides a DLP micro-projection optical engine and adopt the tower telecentric optics design frame of double-deck tower of RTIR prism closed light thereof, this DLP micro-projection optical engine includes: an illumination optical system and a projection optical system, wherein the illumination optical system includes: firstly, an illumination light-combining module for collimating and combining R, G, B three-primary-color LEDs into white light; secondly, the synthesized white light is subjected to 45-degree optical correction to form an illumination and condensation module; and thirdly, the RTIR prism module of the series lighting system and the projection system, wherein the projection optical system (lens) includes: firstly, a telecentric projection lens; secondly, an RTIR prism module of the projection system and the illumination system is connected in series; third, the "Corner Manhattan mode" DMD light modulator.

For a lighting optical system in which: firstly, an illumination light-combining module (8-1 in fig. 8) for collimating and combining R, G, B three primary color LEDs into white light; secondly, an illumination and condensation module (8-7, including 8-2 and 8-3 in the figure 8) for performing 45-degree optical correction on the synthesized white light; third, the RTIR prism modules (8-4 in fig. 8) of the illumination system and the projection system are connected in series.

The lighting and light combining module (8-1 in fig. 8) for collimating and combining R, G, B three primary color LEDs into white light adopts the most common and most stable compound eye type structure in the market, and the specific placing mode is not the key point and the point to be protected of the present invention, and the related form is introduced in chinese patent No. CN 201220437514.

Wherein the illumination condensing module (8-2 and 8-3 in fig. 8) for optically correcting the synthesized white light by 45 degrees comprises: a mirror (8-2 in fig. 8), a relay mirror (8-3 in fig. 8), wherein the mirror presents a spatial 45 degree angle deflection placement, wherein the relay mirror also presents a spatial 45 degree angle deflection placement (the spatial 45 degree angle deflection indicates that the plane M in which the mirror and the relay mirror optical axis are located swings 45 degrees relative to the plane N), the special spatial 45 degree angle deflection placement aims to perform 45 degree optical correction on the white light synthesized by the illumination light combining module (8-1 in fig. 8) of the white light, so that the illumination light beam can irradiate on the DMD light modulator in a 45 degree oblique direction, the innovative design mode of presenting the spatial 45 degree angle deflection placement has the advantage that it perfectly avoids the traditional telecentric design frame (as shown in fig. 5) adopting RTIR prism combination light, which has all optical components in the same plane, and can only irradiate the illumination light beam from right behind the DMD modulator, the disadvantage that the incident light can not be inclined from the DMD modulator to 45 degrees. And the innovative design mode of spatial 45-degree angle deflection placement is adopted to optically correct the illumination light rays by 45 degrees, so that the illumination light ray incidence mode of a 'Corner Manhattan mode' DMD light modulator inclined by 45 degrees as shown in figure 1 is matched.

Wherein the RTIR prism modules of the tandem illumination system and the projection system (e.g., 8-4 in fig. 8) are spatially 45-degree deflected (spatial 45-degree deflection also means that a plane M on which an optical axis of the RTIR prism module is located is rotated 45 degrees with respect to a plane N) as the illumination condensing modules (e.g., 8-2 and 8-3 in fig. 8) which optically correct the synthesized white light by 45 degrees, and the purpose thereof is: on one hand, the synthesized white light is optically corrected by 45 degrees, so that the illumination light beam can irradiate the DMD light modulator in a 'Corner Manhattan mode' in a 45-degree oblique direction; on one hand, the projected imaging light beam is subjected to spatial 45-degree total reflection, so that the picture projected by a projection optical system (lens) (such as 8-6 in fig. 8) is a forward horizontal picture.

Wherein the projection optical system (lens) includes: first, a telecentric projection lens (see 8-6 in fig. 8); secondly, connecting the RTIR prism module of the projection system and the illumination system in series (as 8-4 in FIG. 8); third, the "Corner Manhattan mode" DMD light modulator (8-5 in FIG. 8).

The telecentric projection lens (as 8-6 in fig. 8) is designed according to the specific resolution requirement and the picture size requirement of the DMD light modulator, and the specific design method is not the key point and the point to be protected of the present invention.

The RTIR prism module (8-4 in fig. 8) of the tandem projection system and the illumination system is a part shared by the illumination system and the imaging system, i.e. the function of adjusting the light spot is performed at the illumination end, and the function of steering the imaging light spot is also performed at the imaging end.

When the DMD light modulator in the 'Corner Manhattan mode' (such as 8-5 in figure 8) is placed, the DMD light modulator deflects at 45 degrees with an RTIR prism module (such as 8-4 in figure 8) (the 45-degree deflection also means that a plane M where an optical axis of the DMD light modulator is located swings at 45 degrees relative to a plane N), but an effective surface is still parallel, and the purpose is to enable the 45-degree oblique incident light direction specially required by the DMD light modulator in the 'Corner Manhattan mode' to be consistent with the emergent light direction of the prism.

The illumination and light-gathering module (8-2 and 8-3 in fig. 8) for performing 45-degree optical correction on the synthesized white light has the following characteristics:

1. the mirrors (e.g., 8-2 in fig. 8) in the illumination collection modules (e.g., 8-2 and 8-3 in fig. 8) are spatially offset at a 45 degree angle to reflect the horizontal white light beam (i.e., the white light beam from the fly's eye lens) from the illumination collection module (e.g., 8-1 in fig. 8) that collimates the R, G, B LEDs of the three primary colors and combines the white light into a 45 degree oblique direction. On one hand, the direction of the white light beam is changed, so that the spot shaping of a rear relay lens (such as 8-3 in the figure 8) is facilitated; on one hand, the square light spots emitted by the original horizontal compound eye are integrated into a diamond light spot which is rotated by 45 degrees in space.

2. The relay mirrors (8-3 in fig. 8) in the illumination collection modules (8-2 and 8-3 in fig. 8) exhibit a spatial 45 degree angular deflection placement that further shapes the diamond shaped white light reflected from the mirrors (8-2 in fig. 8) so that the spot can match the size and incident light angle requirements of the active area of the "Corner Manhattan mode" DMD light modulator (8-5 in fig. 8).

The serial lighting system and projection system's RTIR prism module (as 8-4 in figure 8) in the utility model has the following characteristics:

1. the series projection system and the RTIR prism module of the illumination system (as 8-4 in fig. 8) are a part shared by the illumination system and the imaging system, i.e. the function of adjusting the light spot is performed at the illumination end, and the function of steering the imaging light spot is also performed at the imaging end.

2. The RTIR prism modules (8-4 in fig. 8) of the tandem projection system and illumination system are positioned at a spatial 45 degree angular deflection as the illumination collection modules (8-2 and 8-3 in fig. 8) that optically correct the resultant white light at 45 degrees. The purpose is as follows: in one aspect, the resultant white light is optically corrected at 45 degrees so that the illumination beam can impinge on a "Corner Manhattan mode" DMD light modulator (8-5 in FIG. 8) in a 45 degree oblique direction; on one hand, the projected imaging light beam is subjected to spatial 45-degree total reflection, so that the picture projected by a projection optical system (lens) (such as 8-6 in fig. 8) is a forward horizontal picture.

The DMD optical modulator (8-5 in FIG. 8) of the "Corner Manhattan mode" in the present invention has the following features:

1. the DMD Light modulator (8-5 in fig. 8) in the "Corner Manhattan mode" is a type of microarray display chip under dlp (digital Light projector) technology platform of Texas Instruments (TI) in usa, and the incident Light and the emergent Light and the deflection mode of the microarray pixel point belong to the "Corner Manhattan mode", and specifically refer to fig. 1, the biggest difference between the "Corner Manhattan mode" DMD Light modulator (fig. 1) and two other types of DMD Light modulators (fig. 1 and 2) is that the incident direction of the illumination Light is required to be a 45-degree oblique direction.

2. "Corner Manhattan mode" DMD light modulator (as 8-5 in figure 8) when placing in the utility model provides a DLP micro-projection optical engine and tower optical system framework thereof also be 45 degrees with RTIR prism module (as 8-4 in figure 8) and deflect, but the active surface still keeps parallel, its purpose makes "Corner Manhattan mode" DMD light modulator special requirements's 45 degrees oblique incidence light direction unanimous with prism emergent light direction.

1. The utility model discloses DLP micro-projection optical engine and tower optical system framework thereof that novelty provided, its main points lie in: compared with the traditional planar DLP micro-projection optical engine (as shown in fig. 4, 5 and 6), the present invention innovatively provides a DLP micro-projection optical engine and all optical components of the tower-type optical system framework thereof, which are not in the same plane, but are divided into an upper tower-type distribution and a lower tower-type distribution (as shown in fig. 7);

2. the utility model discloses the reflector (as 8-2 in fig. 8) that appears space 45 degrees angle deflection and place in little projection optical engine of DLP and tower optical system framework that the novelty provided, its main points lie in: a mirror with a 45 degree angular deflection in the presentation space reflects a horizontal white light beam (which can be understood as a white light beam from a fly's eye lens) from an illumination combining module (8-1 in fig. 8) that collimates R, G, B three primary color LEDs and combines the collimated light into white light, in a 45 degree oblique direction. On one hand, the direction of the white light beam is changed, so that the spot shaping of a rear relay lens (such as 8-3 in the figure 8) is facilitated; on one hand, the square light spots emitted by the original horizontal compound eye are integrated into a diamond light spot which is rotated by 45 degrees in space;

3. the utility model discloses what the novelty provided presents in DLP micro-projection optical engine and tower optical system framework thereof presents relay lens (as 8-3 in figure 8) that space 45 degrees angle deflection was placed, its main points lie in: the relay mirror with the spatial 45-degree angle deflection position can further shape the rhombic white light reflected from the reflector (8-2 in the figure 8) so that the light spot can match the size and incident light angle requirements of the active area of the 'Corner Manhattan mode' DMD light modulator (8-5 in the figure 8);

4. the utility model discloses what novelty provided presents in DLP micro-projection optical engine and tower optical system framework thereof presents RTIR prism module (as 8-4 in figure 8) that space 45 degrees angle deflection was placed, its main points lie in: the RTIR prism module which is arranged by deflecting at a spatial angle of 45 degrees performs 45-degree optical correction on the synthesized white light, so that the illumination light beams can irradiate a DMD light modulator (8-5 in figure 8) in a 'Corner Manhattan mode' in an oblique 45-degree direction; on one hand, the projected imaging light beam is subjected to spatial 45-degree total reflection, so that a picture projected by a projection optical system (lens) (such as 8-6 in FIG. 8) is a forward horizontal picture;

5. the utility model discloses what innovative proposed is "cornener Manhattan mode" DMD light modulator (as 8-5 in figure 8) that is 45 degrees deflections with RTIR prism module (as 8-4 in figure 8) in DLP micro-projection optical engine and tower optical system framework thereof, its main points lie in: the DMD light modulator with the 'Corner Manhattan mode' deflected by 45 degrees with the RTIR prism module (such as 8-4 in FIG. 8) can meet the special requirement that the DMD light modulator with the 'Corner Manhattan mode' has the 45-degree oblique incidence light direction consistent with the emergent light direction of the prism.

The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.

Claims

1. A DLP micro-projection optical engine with a tower optical device is characterized in that: the device comprises an illumination light-combining module for emitting white light, an illumination light-gathering module for optically correcting the white light, an RTIR prism module for serially illuminating and projecting, a DMD light modulator and a telecentric projection lens, wherein the plane where the optical axes of the illumination light-gathering module, the RTIR prism module, the DMD light modulator and the telecentric projection lens are located and the plane where the optical axis of the illumination light-gathering module is located form an included angle of 35-60 degrees.

2. The DLP micro-projection optical engine with a tower optic according to claim 1, wherein: and the plane where the optical axes of the illumination and light-gathering module, the RTIR prism module, the DMD light modulator and the telecentric projection lens are positioned and the plane where the optical axis of the illumination and light-gathering module is positioned form an included angle of 45 degrees.

3. The DLP micro-projection optical engine with a tower optic according to claim 1 or 2, wherein: the illumination and condensation module comprises a reflecting mirror and a relay mirror.

4. The DLP micro-projection optical engine with a tower optic according to claim 3, wherein: the relay lens is a lens.

5. The DLP micro-projection optical engine with a tower optic according to claim 1, wherein: the RTIR prism module comprises two right-angled triangle prisms with inclined planes attached to each other.

6. The DLP micro-projection optical engine with a tower optic according to claim 1, wherein: the DMD light modulator and the reflecting surface of the RTIR prism module are arranged in parallel at intervals.