CN206115130U

CN206115130U - Light engine system of DLP projector

Info

Publication number: CN206115130U
Application number: CN201621196116.8U
Authority: CN
Inventors: 田海军; 何龙
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2016-10-27
Filing date: 2016-10-27
Publication date: 2017-04-19
Anticipated expiration: 2026-10-27

Abstract

The utility model discloses a light engine system of DLP projector includes light source, colour wheel, optical wand, relaying optical system, speculum, TIR prism, DMD chip and projecting lens in proper order, and relaying optical system comprises a plurality of optical element, and optical element's upper and lower side edge face and TIR prism go out the effective optics region of non - on the plain noodles and all be equipped with and be used for absorbing miscellaneous astigmatic light -absorption layer. The back is modulated through the optical wand to the light that the light source sent, can produce stray light at optical element's upper and lower side edge face, also can produce stray light in the effective optics region of non - of TIR prism, through at above -mentioned regional setting light -absorption layer, with stray light absorption, can realize under the circumstances that does not increase additional structure spare miscellaneous astigmatic elimination, effectively avoids the non - formation of image light and formation of image light mixed admission projecting lens of stray light shape one -tenth to can avoid reducing into the seeing.

Description

A kind of optical engine system of DLP projector

Technical field

The utility model is related to field of projector, especially a kind of optical engine system of DLP projector.

Background technology

DLP projector is digital light processing projector, different from liquid crystal projector, the imaging of DLP projector be by into Thousand small lens reflecting light up to ten thousand are realizing.The optical engine system operation principle of DLP projector as shown in figure 1, The light that light source 1 is produced is divided into red-green-blue light through colour wheel 2, by the way that optical wand 3 is by the light uniformization of light source 1 and carries out light beam Modality conversion, is then mapped to dmd chip 7 through relay optical system 4, speculum 5 and TIR prism 6 by the illumination after homogenization On, imaging line reflection is entered into projection lens 8 through the modulation of dmd chip 7, then projected on screen by projection lens 8, Rather than imaging light is then reflexed to outside camera lens through the modulation of dmd chip 7.

Impact of the veiling glare to DLP projector light engine imaging system is very big, and veiling glare enters as non-imaged light Enter projection lens, picture effect can be affected；Veiling glare greatly from the edge of optical element or effective optical range it Outward, DLP projector optical engine system is complicated, and optical element quantity is many in illuminator, therefore the veiling glare for producing is more.It is existing There is process of the technology to veiling glare, additional mechanism of diaphragm part predominantly at or seldom at several optical elements, due to diaphragm The design of structural member and assembling process are complicated, and cannot set up mechanism of diaphragm because gap is too small between partial optical element Part, therefore the veiling glare that all optical elements are produced cannot be all effectively treated, key position can only be chosen and processed, institute Still to have part veiling glare in system, eventually serve as non-imaged light and participate in imaging, imaging definition can be substantially reduced.

Utility model content

Technical problem to be solved in the utility model is：A kind of optical engine system of DLP projector, Neng Gou are provided The elimination to veiling glare is realized in the case of not increasing additional knot component, be prevented effectively from veiling glare formation non-imaged light with into As light is mixed into projection lens such that it is able to avoid reducing imaging definition.

It is to solve the technical scheme that adopted of above-mentioned technical problem the utility model：A kind of optics of DLP projector draws System is held up, successively including light source, colour wheel, optical wand, relay optical system, speculum, TIR prism, dmd chip and projection lens, Relay optical system is made up of multiple optical elements, non-effective on the lower edges face and TIR prism exiting surface of optical element Optical region is designed with the light-absorption layer for absorbing veiling glare.

It is further：The light-absorption layer is one layer of black light-absorbing film, is fixed by the ink layer for printing or be coated with.

The beneficial effects of the utility model are：The light that light source sends, can be in the upper and lower of optical element after optical wand modulation Edge surface produces veiling glare, and in the non-effective optical region of TIR prism veiling glare can be also produced, and is inhaled by arranging in above-mentioned zone Photosphere, by spuious light absorbs, can be prevented effectively from veiling glare affects imaging definition in projection lens；The utility model is not required to Increase other structures part, easy to implement, simple structure, and do not interfere with the projection for being imaged light, be conducive to improving imaging clearly Clear degree.

Description of the drawings

Fig. 1 is that the light of DLP projector in prior art propagates schematic diagram；

Fig. 2 is that the veiling glare of DLP projector in prior art propagates schematic diagram；

Fig. 3 is that the veiling glare in prior art at TIR prism propagates schematic diagram；

Fig. 4 is the utility model schematic diagram；

Fig. 5 is that veiling glare is absorbed schematic diagram in the utility model；

Fig. 6 is that the veiling glare in the utility model at TIR prism is absorbed schematic diagram；

Fig. 7 is the schematic diagram of light-absorption layer on TIR prism exiting surface；

It is labeled as in figure：1- light sources, 2- colour wheels, 3- optical wands, 4- relay optical systems, 41- optical elements, 5- speculums, 6-TIR prisms, 61-TIR prism exiting surfaces, 7-DMD chips, 8- projection lens, 9- light-absorption layers.

Specific embodiment

For the ease of understanding the utility model, the utility model is further detailed below in conjunction with the accompanying drawings.

Fig. 1 to Fig. 3 is the optical engine system of DLP projector in prior art, can be with the generation of veiling glare occurs by figure At optical element 41 and at TIR prism 6.As shown in Fig. 2 the lower edges face of optical element 41 can produce by reflection cause it is miscellaneous Astigmatism, veiling glare can be with normal imaging light forward projects, and after reaching on dmd chip 7, veiling glare becomes non-imaged light Line, this part non-imaged light intersects on TIR prism exiting surface 61 with imaging light, it is impossible on TIR prism exiting surface 61 Effectively distinguished, the two together enters in projection lens 8 and participates in imaging；As shown in figure 3, the veiling glare produced at TIR prism 6 After leaving TIR prism 6, project wholly or largely entering after the refraction of TIR prism exiting surface 61 as non-imaged light In camera lens 8；Above-mentioned veiling glare can all have a strong impact on the definition of last gained imaging.

As shown in figure 4, a kind of optical engine system of DLP projector of the utility model, successively including light source 1, colour wheel 2, Optical wand 3, relay optical system 4, speculum 5, TIR prism 6, dmd chip 7 and projection lens 8, relay optical system 4 is by multiple Optical element 41 is constituted, and the non-effective optical region on the lower edges face and TIR prism exiting surface 61 of optical element 41 all sets There is light-absorption layer 9.As shown in figure 5, when the veiling glare that optical wand 3 is produced projects the lower edges face of optical element 41, the meeting of light-absorption layer 9 Directly by spuious light absorbs, veiling glare then will not be entered in follow-up optical system, because light-absorption layer 9 is located at optical element 41 Edge surface, therefore will not have any impact to being imaged light；As shown in fig. 6, the veiling glare that TIR prism 6 is produced is through TIR Prism goes out being refracted in projection lens 8 of non-effective optical region on pass face 61, therefore non-on TIR prism exiting surface 61 Effectively optical region arranges light-absorption layer 9, and veiling glare is directly absorbed by light-absorption layer 9, and imaging light is then by being not provided with light-absorption layer 9 Effectively optical region is entered in projection lens 8.

As shown in fig. 7, light-absorption layer 9 is one layer of black light-absorbing film, it is fixed by the ink layer for printing or be coated with, is not increased Plus additional knot component, cost is greatlyd save, also simplify overall structure.

Claims

1. a kind of optical engine system of DLP projector, successively including light source (1), colour wheel (2), optical wand (3), relay optical system System (4), speculum (5), TIR prism (6), dmd chip (7) and projection lens (8), relay optical system (4) is by multiple optics Element (41) is constituted, it is characterised in that：It is non-effective on the lower edges face and TIR prism exiting surface (61) of optical element (41) Optical region is designed with the light-absorption layer (9) for absorbing veiling glare.

2. a kind of optical engine system of DLP projector as claimed in claim 1, it is characterised in that：The light-absorption layer (9) is One layer of black light-absorbing film, is fixed by the ink layer for printing or be coated with.