WO2013063835A1 - Microprojecteur dlp - Google Patents

Microprojecteur dlp Download PDF

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Publication number
WO2013063835A1
WO2013063835A1 PCT/CN2011/082991 CN2011082991W WO2013063835A1 WO 2013063835 A1 WO2013063835 A1 WO 2013063835A1 CN 2011082991 W CN2011082991 W CN 2011082991W WO 2013063835 A1 WO2013063835 A1 WO 2013063835A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
led chip
lens group
color led
vertical
Prior art date
Application number
PCT/CN2011/082991
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 WO2013063835A1 publication Critical patent/WO2013063835A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated 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
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural 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
    • G03B21/2006—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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • 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
    • G03B33/10—Simultaneous recording or projection
    • G03B33/12—Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/3173—Constructional details thereof wherein the projection device is specially adapted for enhanced portability

Definitions

  • the present invention relates to the field of digital projection display technology, and more particularly to a DLP pico projector. 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 its size.
  • Another object of the present invention is to provide a DLP micro projector based on a DMD device to solve the problem of reduced light transmission efficiency which may be caused by a reduction in size of the projector.
  • a DLP micro projector comprising a light supply device, an optical path conversion device, a DLP light modulator and a projection lens device, the light supply device comprising an LED light source and a vertical alignment a direct lens group, a horizontal collimating lens group and a beam splitting lens group;
  • the LED light source comprises a first color LED chip, a second color LED chip and a third color LED chip, wherein the first color LED chip and the second color LED chip are horizontal Arranging and having a central optical axis of a vertical shape, the central optical axis of the third color LED chip is horizontal and coincides with a central optical axis of the optical path changing device;
  • the central optical axis of the vertical collimating lens group is vertical
  • the vertical lens group is disposed above the first color LED chip and the second color LED chip for receiving natural light from the first color LED chip and the second color LED chip and homogenizing the light;
  • the horizontal alignment The central optical axis of the lens group is horizontal and coincides with
  • the central optical axis of the vertical collimating lens group and the central optical axis of the first color LED chip, the central optical axis of the second color LED chip or the first color LED chip and the The vertical optical axes at the midpoint of the two-color LED chip connection coincide.
  • the central optical axis of the vertical collimating lens group and the vertical optical axis at the midpoint of the line connecting the first color LED chip and the second color LED chip coincide.
  • the horizontal collimating lens group and the vertical collimating lens group receive natural light emitted by the LED light source and emit light of approximately parallel light having a divergence of less than 20°.
  • the horizontal collimating lens group and the vertical collimating lens group receive natural light emitted by the LED light source and emit light of approximately parallel light having a divergence of less than 15°.
  • the optical path conversion device includes a fly-eye lens group, a mirror, a condenser lens, and a prism disposed along the optical path, for receiving light from the light supply device and guiding the same to the DLP optical modulator.
  • the mirror is provided with an angle adjustment device.
  • 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°.
  • 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 45.
  • the DLP optical modulator is a DMD.
  • 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 further Set to a parallel state, the overall size of the DLP pico projector can be greatly reduced.
  • the projection lens set of the DLP micro projector of the present invention adopts a plastic lens, 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.
  • the weight of the lens is not only reduces the length of the projection lens, but also greatly reduces the cost of the lens and reduces the projection.
  • the DLP micro projector of the present invention sets the light source to a horizontal state portion and a vertical state portion, respectively, so that the heat dissipation effect is good.
  • DRAWINGS 1 is a schematic structural view of a DLP micro projector according to the present invention. Description of the reference signs:
  • 1-level LED light source 2-first collimating lens, 3-second collimating lens, 4-third collimating lens, 5-fourth collimating lens, 6-vertical LED light source, 7-first minute Chromatic mirror, 8-second dichroic mirror, 9 - compound eye array lens, 10 - fourth lens, 11 - mirror, 12 - converging lens, 13 - prism, 14-DMD, 15 - first lens, 16 - Two lenses, 17 - third lens.
  • the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments thereof, but it is understood that the scope of the invention is not limited by the specific embodiments.
  • 1 is a schematic structural view of a DLP micro projector according to the present invention.
  • 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 a horizontal LED light source 1, a vertical collimating lens group, a vertical LED light source 6, a horizontal collimating lens group and a spectroscopic lens group.
  • the horizontal LED light source 1 is disposed on a horizontal surface and its central optical axis is vertical.
  • a straight red LED chip and a blue LED chip, the vertical LED light source 6 is a green LED chip whose center optical axis is horizontal and coincides with the central optical axis of the optical path changing device.
  • a vertical collimating lens group is disposed above the horizontal LED light source 1 and 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 vertical collimating lens group
  • the vertical optical axis at the midpoint of the line connecting the red LED chip and the blue LED chip is coincident, and the vertical collimator lens group is required to transmit light with a divergence of less than 15° for receiving natural light from the horizontal LED light source 1
  • the light is collimated into approximately parallel light, and the specific parameters of the vertical collimating lens group can be calculated by more technical requirements of those skilled in the art.
  • the horizontal collimating lens group is disposed on the right side of the vertical LED light source 6, and includes a fourth collimating lens 5 and a third collimating lens 4 which are arranged from left to right and whose central optical axes coincide, and the central light of the horizontal collimating lens group
  • the axis coincides with the optical axis of the green LED chip, and the transmitted light of the horizontal collimating lens group
  • the projection light of the vertical collimating lens group intersects perpendicularly, and the horizontal collimating lens group is required to have a divergence of transmitted light of less than 15° for receiving natural light from the vertical LED light source 6 and homogenizing the light into approximately parallel light.
  • the specific parameters of the horizontal collimating lens group can be calculated by more technical requirements of those skilled in the art, or can be the same as the parameters of the vertical collimating lens group.
  • the spectroscopic lens group is disposed at the intersection of the transmitted light of the vertical collimating lens group and the horizontal collimating lens group, and includes a first dichroic mirror 7 and a second dichroic mirror 8 disposed in order from top to bottom, wherein, the second The dichroic mirror 8 reflects red light and transmits green light and blue light.
  • the first dichroic mirror ⁇ reflects blue light and transmits red light and green light, so that the green light emitted by the vertical LED light source 6 can penetrate the first minute in the horizontal direction.
  • the color mirror 7 and the second dichroic mirror 8 are incident on the optical path conversion device, and those skilled in the art can perform corresponding calculations according to the parameters of the collimator lens group to obtain the first dichroic mirror 7 and the second dichroic mirror.
  • the setting angle of 8 is such that the blue light reflected by the first dichroic mirror ⁇ and the red light reflected by the second dichroic mirror 8 are reflected in the horizontal direction into the optical path converting device.
  • the optical path conversion device includes a fly-eye lens group disposed along the optical path, a mirror 11, a converging lens 12, and a prism 13 for receiving light from the light supply device and guiding it to the DLP light modulator, the fly-eye lens
  • the group includes a compound eye array lens 9 and a fourth lens 10 whose central optical axes are coincident, and the central optical axis of the fly-eye lens group is parallel to the reflected light of the spectroscopic lens group, and the mirror 11 is provided with an angle adjusting device for finely adjusting the reflected light.
  • the converging lens 12 and the prism 13 receive the reflected light from the mirror 11 and guide it onto 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 15, a second lens 16, and a third lens 17 disposed along the optical path, wherein the second lens 16 and the third lens 17 are aspherical plastic lenses, which can reduce the length of the lens.
  • the first lens 15, the second lens 16, and the third lens 17 are both plastic 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)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un microprojecteur DLP, la source de lumière du dispositif fournissant la lumière au projecteur étant conçue sous forme d'un dispositif horizontal (1) et d'un dispositif vertical (6). Un groupe de lentilles de collimation horizontales (2, 3) et un groupe de lentilles de collimation verticales (4, 5) correspondent respectivement au dispositif horizontal et au dispositif vertical. Deux verres de spectroscope (7, 8) pour réfléchir de la lumière de différentes couleurs sont disposés séquentiellement le long du trajet optique du groupe de lentilles de collimation verticales. Les trois rayons de lumière de couleur émis par la source de lumière peuvent être mutuellement parallèles et incidents sur les composants optiques situés derrière. Le microprojecteur DLP permet non seulement de réduire la taille du projecteur, mais permet également de résoudre le problème potentiel d'efficacité de transmission de lumière faible du fait d'une diminution de la taille du projecteur.
PCT/CN2011/082991 2011-11-03 2011-11-25 Microprojecteur dlp WO2013063835A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201120432084 CN202306119U (zh) 2011-11-03 2011-11-03 Dlp微型投影机
CN201120432084.8 2011-11-03

Publications (1)

Publication Number Publication Date
WO2013063835A1 true WO2013063835A1 (fr) 2013-05-10

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ID=46374981

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Application Number Title Priority Date Filing Date
PCT/CN2011/082991 WO2013063835A1 (fr) 2011-11-03 2011-11-25 Microprojecteur dlp

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CN (1) CN202306119U (fr)
WO (1) WO2013063835A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI627488B (zh) * 2017-04-10 2018-06-21 佳世達科技股份有限公司 單一前群透鏡的投影系統

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103529629B (zh) * 2012-08-30 2015-12-16 广景科技有限公司 Dlp微型投影机
CN103412459A (zh) * 2013-07-03 2013-11-27 四川星烁光电科技有限公司 一种手机微投影***
JP6200791B2 (ja) * 2013-12-04 2017-09-20 株式会社日立エルジーデータストレージ 光学ユニット、投射型表示装置、および撮像装置
CN203811978U (zh) * 2014-05-15 2014-09-03 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
CN109581797A (zh) * 2019-01-17 2019-04-05 南阳南方智能光电有限公司 一种四通道高亮led微型投影照明***

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1637585A (zh) * 2003-12-19 2005-07-13 卡尔蔡斯耶拿有限公司 用于物体照明的装置
CN201373971Y (zh) * 2009-01-14 2009-12-30 深圳市欧曼特微显示科技有限公司 一种led微型投影机
CN101806990A (zh) * 2010-03-31 2010-08-18 苏州佳世达光电有限公司 高光机效率的投影装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1637585A (zh) * 2003-12-19 2005-07-13 卡尔蔡斯耶拿有限公司 用于物体照明的装置
CN201373971Y (zh) * 2009-01-14 2009-12-30 深圳市欧曼特微显示科技有限公司 一种led微型投影机
CN101806990A (zh) * 2010-03-31 2010-08-18 苏州佳世达光电有限公司 高光机效率的投影装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI627488B (zh) * 2017-04-10 2018-06-21 佳世達科技股份有限公司 單一前群透鏡的投影系統

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Publication number Publication date
CN202306119U (zh) 2012-07-04

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