WO2013053171A1 - Mini-projecteur à dlp et son procédé de projection - Google Patents

Mini-projecteur à dlp et son procédé de projection Download PDF

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Publication number
WO2013053171A1
WO2013053171A1 PCT/CN2011/082963 CN2011082963W WO2013053171A1 WO 2013053171 A1 WO2013053171 A1 WO 2013053171A1 CN 2011082963 W CN2011082963 W CN 2011082963W WO 2013053171 A1 WO2013053171 A1 WO 2013053171A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
angle
lens
led chip
color
Prior art date
Application number
PCT/CN2011/082963
Other languages
English (en)
Chinese (zh)
Inventor
杨伟梁
高志强
赵远
Original Assignee
广景科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广景科技有限公司 filed Critical 广景科技有限公司
Publication of WO2013053171A1 publication Critical patent/WO2013053171A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/148—Beam splitting or combining systems operating by reflection only including stacked surfaces having at least one double-pass partially reflecting surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G02B27/1026—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators
    • G02B27/1033—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators having a single light modulator for all colour channels
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/08—Sequential recording or projection

Definitions

  • the present invention relates to the field of digital projection display technology, and more particularly to a DLP micro projector and a projection method thereof. Background technique
  • DMD (Dig i ta l Mi cromi rror Dev ice ) is a light modulation device developed by TI Corporation of the United States. It can control the micro-mirror array with extremely high reflectivity and can project the three primary colors (RGB) with the projection optical system.
  • the screen, the projector using this device is generally called DLP (Dig i ta l Light Projector) projector.
  • DLP Dig i ta l Light Projector
  • This technology shows great advantages in terms of flow brightness, video image display and contrast ratio compared to conventional LCD projectors.
  • a DLP-based projection system includes signal reception and processing functions, a DLP projection optomechanical module, and supports an all-digital approach.
  • Elements of the DLP Projector module include a light source, a cooling system, signal modulation DMD devices, and projection optics.
  • a DMD can be simply described as a semiconductor optical switch. Thousands of tiny square lenses are constructed on the hinge structure above the static access memory to form a DMD. Each lens can turn on and off one pixel of light.
  • the hinge structure allows the lens to be tilted between two states, +10 degrees being “on”. -10 degrees is "off", when the lenses are not working, they are in a 0 degree “parking" state.
  • the current DLP projector module should be applied to handheld electronic devices, and it is necessary to achieve a small size while maintaining a high light output.
  • optical path and heat dissipation structure in the optical device also require detailed design, and the production cost of the overall optical machine must also be considered to meet the application of the portable electronic device.
  • one of the objects of the present invention is to provide a DLP micro projector based on a DMD device in order to reduce the size thereof.
  • Another object of the present invention is to provide a Projection method to solve the possibility of reducing the size of the projector The problem of reduced light transmission efficiency.
  • a DLP pico projector including a light supply device, an optical path conversion device, a DLP light modulator, and a projection lens device, the light supply device including a sequentially arranged LED light source, a collimating lens group and a spectroscopic lens group;
  • the LED light source is a first color LED chip, a second color LED chip and a third color LED chip arranged in a line in a same plane, the first color LED chip and the second color LED The color light of the chip and the third color LED chip are different and sequentially arranged;
  • the central optical axis of the collimating lens group coincides with the central optical axis of the first color LED chip, the second color LED chip or the third color LED chip, Receiving natural light from the LED light source and homogenizing the light;
  • the beam splitting lens set includes a first mirror, a first dichroic mirror and a second dichroic mirror arranged in sequence, and the first mirror and the plane of the LED light source are clipped.
  • the central optical axis of the collimating lens group coincides with the central optical axis of the second color LED chip.
  • the second angle is 45.
  • the angle between the first mirror and the first dichroic mirror and the second dichroic mirror and the first dichroic mirror is less than 45°, more preferably less than 30°.
  • the collimating lens group receives the natural light emitted by the LED light source and emits light of approximately parallel light having a divergence of less than 20°, and more preferably has a divergence of less than 15°.
  • the optical path conversion device includes a fly-eye lens group, a second mirror, a converging lens and a prism arranged along the optical path for receiving light from the light supply device and uniformly guiding the same Lead to the DLP light modulator.
  • the projection lens device comprises a first lens, a second lens and a third lens arranged along the optical path, the second lens and the third lens being aspherical plastic lenses, and the first lens is a plastic lens.
  • the angle between the central optical axis of the fly-eye lens group and the central optical axis of the projection lens group in the optical path conversion device is less than 60°, more preferably less than 45.
  • the DLP optical modulator is a DMD.
  • the second mirror is provided with an angle adjusting device.
  • the light source of the projector light supply device is set as three color light LED chips arranged in a straight line on the same plane, and then a collimating lens group is disposed, so that the central optical axis of the collimating lens group is located in the middle
  • the central optical axes of the LED chips are coincident, and then two spectroscopic lenses that reflect different color lights and a reflecting lens are sequentially disposed along the optical path of the collimating lens group, so that the three color lights emitted by the light source can be incident parallel to each other to the subsequent optics.
  • the arrangement angles of the beam splitters and the mirrors can be calculated by those skilled in the art based on the collimation lens parameters.
  • the DLP pico projector according to the present invention can greatly reduce the size of the light supply device due to the unique structure of the light supply device, and if the central optical axis of the fly-eye lens group and the central optical axis of the projection lens group are set In parallel, the overall size of the DLP pico projector can be greatly reduced.
  • the projection lens set of the DLP pico projector according to the present invention uses plastic lenses, and two of the lenses are aspherical lenses, which not only reduces the length of the projection lens, but also greatly reduces the cost of the lens and reduces the projection lens. the weight of.
  • FIG. 1 is a schematic structural view of a DLP pico projector according to the present invention. Description of the reference signs:
  • 1-LED source 2 - first collimating lens, 3 - second collimating lens, 4_ second dichroic mirror, 5-first dichroic mirror, 6-first mirror, 7-plex eye array lens, 8-fourth lens, 9-converging lens, 10 - third lens, 11 - second lens, 12 - first lens, 13-prism, 14-DMD, 15-second mirror.
  • the projection method of the present invention is to set the light source of the projector light supply device to three color light LED chips arranged in a line on the same plane, and then set a collimating lens group to make the central light of the collimating lens group
  • the axis coincides with the central optical axis of the LED chip located in the middle, and then two spectroscopic lenses reflecting different color lights and one reflecting lens are sequentially disposed along the optical path of the collimating lens group, so that the three color lights emitted by the light source can be incident parallel to each other.
  • the size of the projector can be reduced, and the problem of reduced light transmission efficiency due to the reduction in size of the projector can be effectively solved.
  • FIG. 1 The following is a further description of the structure of the projector.
  • the DLP pico projector includes a light supply device, an optical path conversion device, a DMD 14, and a projection. Lens device.
  • the light supply device comprises an LED light source 1, a collimating lens group and a spectroscopic lens group which are arranged in order from bottom to top, and the LED light source 1 is a red LED chip, a green LED chip and a blue LED which are arranged in a line on a horizontal plane.
  • the chip, the red LED chip and the blue LED chip are symmetrically disposed on both sides of the green LED chip.
  • the collimating lens group includes a first collimating lens 2 and a second collimating lens 3 which are arranged from bottom to top and whose central optical axes coincide, the central optical axis of the collimating lens group coincides with the central optical axis of the green LED chip, and
  • the collimated lens group is required to have a divergence of transmitted light of less than 15.
  • the specific reference of the collimating lens group The number can be calculated by a person skilled in the art with more design requirements.
  • the spectroscopic lens group includes a first mirror 6, a first dichroic mirror 5, and a second dichroic mirror 4 arranged in order from top to bottom, wherein the second dichroic mirror 4 reflects red light and transmits green light and blue light.
  • the first dichroic mirror 5 reflects green light and transmits red light and blue light.
  • the angle between the first mirror 6 and the plane of the LED light source 1 is a first angle
  • the angle between the first dichroic mirror 5 and the plane of the LED light source 1 is a second angle
  • the second dichroic mirror 4 The angle between the plane of the LED light source 1 and the plane of the LED light source 1 is a third angle.
  • the second angle can be set to 45°, and the size of the first angle and the third angle can be determined by the prior art. Calculated according to the parameters of the collimating lens group, the light emitted by the green LED chip and the red LED chip symmetrically disposed on both sides thereof and the blue LED chip are reflected to the optical path conversion device at the same angle. .
  • the optical path conversion device includes a fly-eye lens group, a second mirror 15, a converging lens 9 and a prism 13 arranged along the optical path for receiving light from the light supply device and uniformly guiding the same to the DLP light modulator, the compound eye
  • the lens group includes a compound eye array lens 7 and a fourth lens 8 whose central optical axes are coincident, and a central optical axis of the fly-eye lens group is parallel to the reflected light of the spectroscopic lens group, and the second mirror 15 is provided with an angle adjusting device for The angle of the reflected light is finely adjusted, and the condenser lens 9 and the prism 13 receive the reflected light of the second mirror 15 and guide it to the DMD 14.
  • the optical path conversion device of the present invention replaces the conventional light bar design and reduces the size of the optical path conversion device.
  • the projection lens arrangement is adapted to receive light modulated by the DMD 14 and to project an image, which uses a telecentric optical path design to increase the optical aperture of the projection lens arrangement.
  • the projection lens device includes a first lens 12, a second lens 11 and a third lens 10 which are sequentially disposed along the optical path, wherein the second lens 11 and the third lens 10 are aspherical plastic lenses, which can reduce the length of the lens.
  • the first lens 12, the second lens 11 and the third lens 10 are all plastic-shaped lenses, which are formed by an injection molding process, which can greatly reduce the cost and the weight of the lens.
  • the central optical axis of the projection lens device can be set to be parallel to the central optical axis of the fly-eye lens group.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Led Device Packages (AREA)

Abstract

L'invention porte sur un mini-projecteur à traitement numérique de lumière (DLP) et sur un procédé de projection. Une source de lumière (1) d'un dispositif d'alimentation en lumière du projecteur est constituée par des puces de diodes électroluminescentes ayant trois types de lumières colorées et disposées en ligne droite sur le même plan. Le projecteur comprend de plus un groupe de lentille de collimation (2, 3). Un axe optique central du groupe de lentille de collimation coïncide avec un axe optique central de la puce de diodes électroluminescentes au centre. Deux spectroscopes (4, 5) pour réfléchir une lumière colorée différente et un miroir réfléchissant (6) sont disposés dans l'ordre le long d'une trajectoire optique du groupe de lentille de collimation. Les trois types de lumières colorées émises à partir de la source de lumière peuvent être émises en parallèle vers des parties optiques suivantes.
PCT/CN2011/082963 2011-10-14 2011-11-25 Mini-projecteur à dlp et son procédé de projection WO2013053171A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110312776.3 2011-10-14
CN2011103127763A CN103048862A (zh) 2011-10-14 2011-10-14 Dlp微型摄影机及其投影方法

Publications (1)

Publication Number Publication Date
WO2013053171A1 true WO2013053171A1 (fr) 2013-04-18

Family

ID=48061555

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/082963 WO2013053171A1 (fr) 2011-10-14 2011-11-25 Mini-projecteur à dlp et son procédé de projection

Country Status (2)

Country Link
CN (1) CN103048862A (fr)
WO (1) WO2013053171A1 (fr)

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CN104166206B (zh) * 2013-05-19 2016-08-03 沈阳峰点科技有限公司 一种光反射投影装置
CN203838464U (zh) * 2014-05-15 2014-09-17 广景科技有限公司 直线型dlp 微型投影机
CN104155835B (zh) * 2014-08-15 2015-12-30 广景科技有限公司 Dlp微型投影机
CN104656360A (zh) * 2015-02-28 2015-05-27 胡开标 一种微型数字投影仪
TWI591417B (zh) 2016-04-08 2017-07-11 佳世達科技股份有限公司 投影機
CN105759548A (zh) * 2016-04-15 2016-07-13 苏州佳世达光电有限公司 投影机
CN106226912B (zh) * 2016-09-27 2019-11-22 深圳市安华光电技术有限公司 近眼显示照明光路及透射式近眼显示照明光路
CN108769637A (zh) * 2018-05-11 2018-11-06 宁波中车时代传感技术有限公司 基于dlp技术的列车司控系统抬头显示装置
CN112034669A (zh) * 2019-06-03 2020-12-04 青岛海信激光显示股份有限公司 激光投影设备
US11460763B2 (en) * 2019-09-03 2022-10-04 Casio Computer Co., Ltd. Light source unit and projector
CN111427141A (zh) * 2020-03-24 2020-07-17 哈尔滨工业大学 一种基于多棱镜组件的均光照明光学系统
CN113885282B (zh) * 2020-07-02 2023-06-13 苏州佳世达光电有限公司 投影机
US11726397B2 (en) 2020-12-31 2023-08-15 Iview Displays (Shenzhen) Company Ltd. Projection apparatus
CN112731751A (zh) * 2020-12-31 2021-04-30 广景视睿科技（深圳）有限公司 一种投影设备
CN114114797A (zh) * 2021-12-23 2022-03-01 广景视睿科技（深圳）有限公司 一种双反射式的微投影光学引擎
CN114384742A (zh) * 2021-12-23 2022-04-22 广景视睿科技（深圳）有限公司 一种双反射式的微投影光学引擎
CN114384741A (zh) * 2021-12-23 2022-04-22 广景视睿科技（深圳）有限公司 一种双反射式的微投影光学引擎

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