CN202306119U - DLP minisize projector - Google Patents

DLP minisize projector Download PDF

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Publication number
CN202306119U
CN202306119U CN 201120432084 CN201120432084U CN202306119U CN 202306119 U CN202306119 U CN 202306119U CN 201120432084 CN201120432084 CN 201120432084 CN 201120432084 U CN201120432084 U CN 201120432084U CN 202306119 U CN202306119 U CN 202306119U
Authority
CN
China
Prior art keywords
led chip
light
lens
optical axis
dlp
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
CN 201120432084
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Chinese (zh)
Inventor
杨伟梁
赵远
高志强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vision technology (Hongkong) Co., Ltd.
Original Assignee
IVIEW Ltd
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 IVIEW Ltd filed Critical IVIEW Ltd
Priority to CN 201120432084 priority Critical patent/CN202306119U/en
Priority to PCT/CN2011/082991 priority patent/WO2013063835A1/en
Application granted granted Critical
Publication of CN202306119U publication Critical patent/CN202306119U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

The utility model discloses a DLP (Digital Light projector) minisize projector. The light source of a projector light apparatus is set to be a horizontal state and a vertical state, a horizontal collimating lens set and a vertical collimating lens set are respectively arranged correspondingly and two spectral lenses reflecting different coloured lights are arranged along a light path of the vertical collimating lens set, in such a way that three kinds of coloured lights emitted by the light source can mutually and parallelly emit in sequential optical components. The DLP minisize projector not only can reduce the dimension of a projector, but also can solve the problem of low light transmission efficiency possibly brought by the reduction of the dimension of the projector.

Description

The DLP minitype projection machine
Technical field
The utility model relates to digital projection display technique field, relates to a kind of DLP minitype projection machine in particular.
Background technology
DMD (Digital Micromirror Device) is the light modulation device of American TI Company exploitation; It sees through the high microreflection lens array of control reflectivity; Cooperate projection optical system can project the picture that constitutes by three primary colors (RGB), use the projector of this device to be commonly referred to as DLP (Digital Light Projector) projector.This technology is all demonstrating very big superiority than traditional LCD projector aspect lumen brightness, video image demonstration and the contrast.A DLP comprises signal reception and processing capacity, DLP projection ray machine module and supports digital methods for basic optical projection system.The element of DLP projection ray machine module comprises a light source, cooling system, signal modulation DMD device and a projection optics element.A DMD can simply be described as being a semiconductor optical switch.Thousands of small square eyeglasses are built upon on the hinge arrangement of static random access memory top and form DMD.Each eyeglass can a pixel of break-make light.Hinge arrangement allows eyeglass between two states, to tilt, and+10 degree are " opening ".-10 degree are for " pass ", and when eyeglass was not worked, they were in 0 degree " berthing " state.
Present DLP projector module will be applied in the hand-held electronic equipment; Will realize small size keeping having under the condition of high light output; For realize suitable dimensions except the design of projecting light path is wanted succinct efficient; For supplying light path and radiator structure in the electro-optical device also need carry out detailed design, also to consider the production cost of whole ray machine simultaneously, to satisfy the application of palmtronic.
The utility model content
For satisfying the application of projector in hand-held electronic equipment, one of purpose of the utility model is to provide a kind of DLP minitype projection machine based on the DMD device, so that reduce its size.
Another purpose of the utility model is to provide a kind of DLP minitype projection machine based on the DMD device, to solve the problem that reduces the light conduction efficiency reduction that institute possibly bring because of projector's size.
The utility model is to adopt following technical scheme to realize above-mentioned purpose: a kind of DLP minitype projection machine; Comprise and supply electro-optical device, optical path switching device, DLP photomodulator and projection lens device, this confession electro-optical device to include led light source, vertical collimation lens set, horizontal collimation lens set and beam split lens set;
This led light source comprises the first look led chip, second look led chip and the three-color LED chip; This first look led chip, the second look led chip are horizontally and its central optical axis is vertical shape, and the central optical axis of this three-color LED chip is horizontal and overlaps with the central optical axis of light path converter device;
The central optical axis of this vertical collimation lens set is vertical shape, and this vertical lens combination is arranged on the first look led chip and second look led chip top, in order to receive from the natural light of the first look led chip and the second look led chip and with equalizing light rays;
The central optical axis of this horizontal collimation lens set is horizontal and overlaps with the central optical axis of three-color LED chip; In order to receive from the natural light of three-color LED chip and with equalizing light rays, the transmitted light of this horizontal lens combination intersects vertically with the projection light of this vertical lens combination;
This beam split lens set comprises first dichronic mirror and second dichronic mirror that is provided with in regular turn; This first dichronic mirror reflects the light of the first look led chip and the light of transmission second led chip and three-color LED chip; This second dichronic mirror reflects the light of the second look led chip and the light of transmission first led chip and three-color LED chip; The light that the first look led chip and the second look led chip are sent is reflexed in the optical path switching device with horizontal in order to realizing, the light that the three-color LED chip is sent is transmitted in the optical path switching device with horizontal.
As further specifying of such scheme:
Preferably, the vertical optical axis coincidence of the midpoint of the central optical axis of the central optical axis of the central optical axis of said vertical collimation lens set and the first look led chip, the second look led chip or the first look led chip and the second look led chip line.
Preferably, the vertical optical axis coincidence of the midpoint of the central optical axis of said vertical collimation lens set and the first look led chip and the second look led chip line.
Preferably, said horizontal collimation lens set and the vertical collimation lens set light of accepting to send behind the natural light that led light source sends is divergence less than 20 ° approximate directional light.
Preferably, said horizontal collimation lens set and the vertical collimation lens set light of accepting to send behind the natural light that led light source sends is divergence less than 15 ° approximate directional light.
Preferably, said optical path switching device comprises compound eye lens group, catoptron, convergent lens and the prism that is provided with in regular turn along light path, is used to accept to confess the light of electro-optical device and it evenly is directed to the DLP photomodulator that this catoptron is provided with angle regulator.
Preferably, said projection lens device comprises first lens, second lens and the 3rd lens that are provided with in regular turn along light path, and these second lens and the 3rd lens are aspherical plastic lens, and these first lens are plastic lens.
Preferably, in the said optical path switching device angle of the central optical axis of the central optical axis of compound eye lens group and projection lens group less than 60 °.
Preferably, in the said optical path switching device angle of the central optical axis of the central optical axis of compound eye lens group and projection lens group less than 45 °.
Preferably, said DLP photomodulator is DMD.
The beneficial effect that the utility model adopts above technical scheme to reach is:
1. the described DLP minitype projection machine of the utility model; Because of it supplies the peculiar structure of electro-optical device; Can reduce to supply the size of electro-optical device greatly; If again the central optical axis of compound eye lens group and the central optical axis of projection lens group are arranged to parastate, then can reduce the overall dimensions of DLP minitype projection machine greatly.
2. the projection lens group of the said DLP minitype projection machine of the utility model is because of adopting glass lens, and wherein two lens are aspherical lens, have not only reduced the length of projection lens, greatly reduce the cost of camera lens, have also alleviated the weight of projection lens.
3. the described DLP minitype projection machine of the utility model light source is made as horizontality part and vertical state part respectively, so radiating effect is better.
Description of drawings
Fig. 1 is the structural representation of the described DLP minitype projection machine of the utility model.
Description of reference numerals:
The horizontal led light source of 1-, 2-first collimation lens, 3-second collimation lens, 4-the 3rd collimation lens, 5-the 4th collimation lens; The vertical led light source of 6-, 7-first dichronic mirror, 8-second dichronic mirror, 9-compound eye array lens; 10-the 4th lens, 11-catoptron, 12-convergent lens, 13-prism; 14-DMD, 15-first lens, 16-second lens, 17-the 3rd lens.
Embodiment
For further setting forth the 26S Proteasome Structure and Function of the utility model, below in conjunction with accompanying drawing and preferred embodiment the utility model is elaborated, but the protection domain that is to be understood that the utility model does not receive the restriction of embodiment.
Fig. 1 is the structural representation of the described DLP minitype projection machine of the utility model, and shown in figure, this DLP minitype projection machine comprises confession electro-optical device, optical path switching device, DMD14 and projection lens device.
Supply electro-optical device to include horizontal led light source 1, vertically collimation lens set, vertically led light source 6, horizontal collimation lens set and beam split lens set; This horizontal led light source 1 is for being arranged on the surface level and its central optical axis is the red LED chip and the blue-light LED chip of vertical shape, and this vertical led light source 6 is the horizontal and green light LED chip that overlap with the central optical axis of light path converter device of central optical axis.
Vertically collimation lens set is arranged on horizontal led light source 1 top; Comprise first collimation lens 2 and second collimation lens 3 that arrangement from the bottom to top and central optical axis overlap; The vertical optical axis coincidence of the midpoint of the central optical axis of this vertical collimation lens set and red LED chip and blue-light LED chip line; And the divergence that requires this vertical collimation lens set transmitted light is less than 15 °; Be approximate directional light in order to receive from the natural light of horizontal led light source 1 and with equalizing light rays, the concrete parameter of this vertical collimation lens set can have more designing requirement by those skilled in the art and calculate.
It is right-hand that horizontal collimation lens set is arranged on vertical led light source 6; Comprise the 4th collimation lens 5 and the 3rd collimation lens 4 that arrangement from left to right and central optical axis overlap; The optical axis coincidence of the central optical axis of this horizontal collimation lens set and green light LED chip; The transmitted light of this horizontal collimation lens set intersects vertically with the projection light of this vertical collimation lens set; And the divergence that requires this horizontal collimation lens set transmitted light is less than 15 °; Be approximate directional light in order to receive from the natural light of vertical led light source 6 and with equalizing light rays, the concrete parameter of this horizontal collimation lens set can have more designing requirement by those skilled in the art and calculate, also can be identical with the parameter of vertical collimation lens set.
The beam split lens set is arranged on the transmitted light intersection of vertical collimation lens set and horizontal collimation lens set; Comprise first dichronic mirror 7 and second dichronic mirror 8 that are provided with in regular turn from top to bottom; Wherein, Second dichronic mirror, 8 reflect red and transmit green and blue light, first dichronic mirror, 7 reflect blue and transmit red light and green glow, like this; Vertically the green glow that sends of led light source 6 can along continuous straight runs penetrates first dichronic mirror 7 and second dichronic mirror 8 and incides in the optical path switching device; Those skilled in the art carry out corresponding calculated according to the parameter of collimation lens set again, can obtain the angle that is provided with of first dichronic mirror 7 and second dichronic mirror 8, so that the ruddiness along continuous straight runs of the blue light of first dichronic mirror, 7 reflections and 8 reflections of second dichronic mirror reflexes in the optical path switching device.
Optical path switching device comprises compound eye lens group, catoptron 11, convergent lens 12 and the prism 13 that is provided with in regular turn along light path; Be used to accept to confess the light of electro-optical device and it evenly is directed to the DLP photomodulator; This compound eye lens group comprises compound eye array lens 9 and the 4th lens 10 that central optical axis overlaps; And the central optical axis of this compound eye lens group is parallel with the reflected light of beam split lens set; This catoptron 11 is provided with angle regulator, and in order to finely tune catoptrical angle, this convergent lens 12 is accepted the reflected light of catoptron 11 with prism 13 and it is directed on the DMD14.The described optical path switching device of the utility model has been replaced optical wand design commonly used, has reduced the size of optical path switching device.
Projection lens device is in order to accept light and the projection imaging through the DMD14 modulation, and it uses the telecentric beam path design to increase the optical aperture of projection lens device.This projection lens device comprises first lens 15, second lens 16 and the 3rd lens 17 that are provided with in regular turn along light path; Wherein these second lens 16 and the 3rd lens 17 are aspherical plastic lens; Can reduce lens length like this; And these first lens 15, second lens 16 and the 3rd lens 17 are the lens of plastic material, adopt the Shooting Technique moulding, and can reduce cost greatly so also can alleviate camera lens weight.For further reducing the size of projector, can the central optical axis of projection lens device be made as parallel with the central optical axis of compound eye lens group.
Be merely one of the utility model preferred embodiment shown in the utility model the foregoing description and the accompanying drawing; Can not limit to the utility model with this; Under the condition that does not break away from the utility model marrow, any change that those skilled in the art did all belongs to the protection domain of the utility model.

Claims (10)

1. a DLP minitype projection machine comprises supplying electro-optical device, optical path switching device, DLP photomodulator and projection lens device, this confession electro-optical device to include led light source, vertical collimation lens set, horizontal collimation lens set and beam split lens set;
This led light source comprises the first look led chip, second look led chip and the three-color LED chip; This first look led chip, the second look led chip are horizontally and its central optical axis is vertical shape, and the central optical axis of this three-color LED chip is horizontal and overlaps with the central optical axis of light path converter device;
The central optical axis of this vertical collimation lens set is vertical shape, and this vertical lens combination is arranged on the first look led chip and second look led chip top, in order to receive from the natural light of the first look led chip and the second look led chip and with equalizing light rays;
The central optical axis of this horizontal collimation lens set is horizontal and overlaps with the central optical axis of three-color LED chip; In order to receive from the natural light of three-color LED chip and with equalizing light rays, the transmitted light of this horizontal lens combination intersects vertically with the projection light of this vertical lens combination;
This beam split lens set comprises first dichronic mirror and second dichronic mirror that is provided with in regular turn; This first dichronic mirror reflects the light of the first look led chip and the light of transmission second led chip and three-color LED chip; This second dichronic mirror reflects the light of the second look led chip and the light of transmission first led chip and three-color LED chip; The light that the first look led chip and the second look led chip are sent is reflexed in the optical path switching device with horizontal in order to realizing, the light that the three-color LED chip is sent is transmitted in the optical path switching device with horizontal.
2. DLP minitype projection machine according to claim 1; It is characterized in that the vertical optical axis coincidence of the midpoint of the central optical axis of the central optical axis of said vertical collimation lens set and the first look led chip, the central optical axis of the second look led chip or the first look led chip and the second look led chip line.
3. DLP minitype projection machine according to claim 1 and 2 is characterized in that, the vertical optical axis coincidence of the midpoint of the central optical axis of said vertical collimation lens set and the first look led chip and the second look led chip line.
4. DLP minitype projection machine according to claim 1 is characterized in that, the light that said horizontal collimation lens set and vertical collimation lens set accept to send behind the natural light that led light source sends is divergence less than 20 ° approximate directional light.
5. DLP minitype projection machine according to claim 4 is characterized in that, the light that said horizontal collimation lens set and vertical collimation lens set accept to send behind the natural light that led light source sends is divergence less than 15 ° approximate directional light.
6. DLP minitype projection machine according to claim 3; It is characterized in that; Said optical path switching device comprises compound eye lens group, catoptron, convergent lens and the prism that is provided with in regular turn along light path; Be used to accept to confess the light of electro-optical device and it evenly is directed to the DLP photomodulator that this catoptron is provided with angle regulator.
7. DLP minitype projection machine according to claim 6; It is characterized in that; Said projection lens device comprises first lens, second lens and the 3rd lens that are provided with in regular turn along light path, and these second lens and the 3rd lens are aspherical plastic lens, and these first lens are plastic lens.
8. according to claim 1 or 5 described DLP minitype projection machines, it is characterized in that the angle of the central optical axis of the central optical axis of compound eye lens group and projection lens group is less than 60 ° in the said optical path switching device.
9. DLP minitype projection machine according to claim 8 is characterized in that, the angle of the central optical axis of the central optical axis of compound eye lens group and projection lens group is less than 45 ° in the said optical path switching device.
10. DLP minitype projection machine according to claim 1 is characterized in that, said DLP photomodulator is DMD.
CN 201120432084 2011-11-03 2011-11-03 DLP minisize projector Expired - Lifetime CN202306119U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN 201120432084 CN202306119U (en) 2011-11-03 2011-11-03 DLP minisize projector
PCT/CN2011/082991 WO2013063835A1 (en) 2011-11-03 2011-11-25 Dlp micro projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120432084 CN202306119U (en) 2011-11-03 2011-11-03 DLP minisize projector

Publications (1)

Publication Number Publication Date
CN202306119U true CN202306119U (en) 2012-07-04

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WO (1) WO2013063835A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
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CN103412459A (en) * 2013-07-03 2013-11-27 四川星烁光电科技有限公司 Mobile phone micro projection system
CN103529629A (en) * 2012-08-30 2014-01-22 广景科技有限公司 DLP miniature projector
CN104656360A (en) * 2015-02-28 2015-05-27 胡开标 Mini digital projector
CN104698726A (en) * 2013-12-04 2015-06-10 日立乐金光科技株式会社 Optical unit, projection display apparatus and imaging apparatus
WO2015172537A1 (en) * 2014-05-15 2015-11-19 广景科技有限公司 Dlp micro projector
CN109581797A (en) * 2019-01-17 2019-04-05 南阳南方智能光电有限公司 A kind of highlighted LED micro projection lighting system of four-way

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TWI627488B (en) * 2017-04-10 2018-06-21 佳世達科技股份有限公司 Projection system with single front lens

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DE10359753B3 (en) * 2003-12-19 2005-08-18 Carl Zeiss Jena Gmbh Arrangement for illuminating a display
CN201373971Y (en) * 2009-01-14 2009-12-30 深圳市欧曼特微显示科技有限公司 LED micro projector
CN101806990B (en) * 2010-03-31 2012-01-04 苏州佳世达光电有限公司 Projecting device with high light-engine efficiency

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103529629A (en) * 2012-08-30 2014-01-22 广景科技有限公司 DLP miniature projector
CN103412459A (en) * 2013-07-03 2013-11-27 四川星烁光电科技有限公司 Mobile phone micro projection system
CN104698726A (en) * 2013-12-04 2015-06-10 日立乐金光科技株式会社 Optical unit, projection display apparatus and imaging apparatus
WO2015172537A1 (en) * 2014-05-15 2015-11-19 广景科技有限公司 Dlp micro projector
CN104656360A (en) * 2015-02-28 2015-05-27 胡开标 Mini digital projector
CN109581797A (en) * 2019-01-17 2019-04-05 南阳南方智能光电有限公司 A kind of highlighted LED micro projection lighting system of four-way

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Effective date of registration: 20170324

Address after: Hongkong Wan Chai Road No. 66 notice China Pico building 18 floor

Patentee after: Vision technology (Hongkong) Co., Ltd.

Address before: Hongkong Wan Chai Road No. 66 notice China Pico building 18 floor

Patentee before: Iview Ltd.

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