CN101533209A - Adjusting component of projector optical lens, projector optical engine and projector - Google Patents
Adjusting component of projector optical lens, projector optical engine and projector Download PDFInfo
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- CN101533209A CN101533209A CN 200810081188 CN200810081188A CN101533209A CN 101533209 A CN101533209 A CN 101533209A CN 200810081188 CN200810081188 CN 200810081188 CN 200810081188 A CN200810081188 A CN 200810081188A CN 101533209 A CN101533209 A CN 101533209A
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Abstract
The invention provides an adjusting component of a projector optical lens, a projector optical engine comprising the adjusting component and a projector comprising the optical engine. The adjusting component of the projector optical lens comprises the optical lens and a first adjusting bracket, wherein the first adjusting bracket is arranged on an optical engine base of the projector or a second adjusting bracket which is adjustable on the optical engine base, and provided with a fixing mechanism that is used for fixing the optical lens, and an adjustment operating mechanism used for implementing adjustment operation, an adjustment limiting mechanism used for limiting adjustment directions and an adjustment locating mechanism used for fixing adjustment positions are formed between the optical engine base and the second adjusting bracket. The adjusting component of the projector optical lens, the projector optical engine and the projector reduce the quantity of parts and lighten the weight of parts, and are beneficial to realizing the light weight of the projector.
Description
Technical field
The present invention relates to projector's technical field, relate in particular to projector optical lens the adjustment assembly, comprise the projector optical engine of this adjustment assembly and comprise the projector of this light engine.
Background technology
In recent years, miniaturization, lightweight and cheaply projector developed rapidly, how to reduce the quantity of using parts fully, the weight that alleviates parts has become a kind of trend.
The application number that proposes on April 5th, 2007 the applicant is CN200710100526.7, and name is called optical system and the principle of work that has specifically disclosed a kind of projector in the patented claim of " optics cooling body and adopt the projection type video display device of this mechanism ".
Be illustrated in figure 1 as the formation diagrammatic sketch of optical system 13 in the above-mentioned patented claim.From white light process collector lens the 20, the 1st integration lens the 21, the 2nd integration lens 22, polarising beam splitter (PBS) 23 and the collector lens 24 etc. of illuminator 19, to 25 irradiations of the 1st dichronic mirror.
Above-mentioned the 1st integration lens 21 and the 2nd integration lens 22 are made of the fly lens that the rectangular arrangement of a plurality of lens units forms respectively, have the function of the Illumination Distribution homogenization that makes the white light that illuminator 19 sends.
In addition, polarising beam splitter (PBS) 23 possesses polarized light separation membrane and phasic difference plate (1/2 wave plate).Polarized light separation membrane makes from for example P polarized light in the light of the 2nd integration lens 22 and sees through, and makes the outgoing a little after changing of S polarized light light path.The P polarized light that sees through polarized light separation membrane is transformed into outgoing behind the S polarized light by the phasic difference plate that is located at its front side (light exit side).That is the nearly all consistent S polarized light that becomes of light.
Light by above-mentioned polarising beam splitter 23 arrives the 1st dichronic mirror 25 through collector lens 24.The 1st dichronic mirror 25 only has the blue component reflection of light and the function that redness and green component are passed through, and the redness of passing through and the light of green component arrive the 2nd dichronic mirror 26.The 2nd dichronic mirror 26 has the green component reflection of light and the function that red component is passed through.Thereby the white light that illuminator 19 sends is divided into blue light, green glow and ruddiness by the 1st and the 2nd dichronic mirror 25,26.
The blue light of the 1st dichronic mirror 25 reflections is reflected by completely reflecting mirror 27, the green glow of the 2nd dichronic mirror 26 reflections is kept intact, ruddiness by the 2nd dichronic mirror 26 is reflected by completely reflecting mirror 29,31 via relay lens 28,30, imports image then respectively and generates optical system 32.
Image generates in the optical system 32, in three sides of the look synthetic prisms 33 of cube shaped, respectively configuration dismantledly be provided with ruddiness with liquid crystal panel 34r, green glow with liquid crystal panel 34g and blue light prism installing component 35 (with reference to Fig. 4) with liquid crystal panel 34b etc.The configuration outgoing lateral deviation tabula rasa 36r between the liquid crystal panel 34r at look synthetic prisms 33 and ruddiness, configuration outgoing lateral deviation tabula rasa 36g and preposition Polarizer 37g between the liquid crystal panel 34g at look synthetic prisms 33 and green glow, configuration outgoing lateral deviation tabula rasa 36b and preposition Polarizer 37b between the liquid crystal panel 34b at look synthetic prisms 33 and blue light.In addition, the light incident side at three liquid crystal panel 34r, 34g, 34b disposes light incident side Polarizer 38r, 38g, 38b and collector lens 39r, 39g, 39b respectively.
Thereby, be imported into the collector lens 39b that blue light is used by the blue light of the 1st dichronic mirror 25 and completely reflecting mirror 27 reflections, with liquid crystal panel 34b and preposition Polarizer 37b, exiting side Polarizer 36b, arrive look synthetic prisms 33 via light incident side Polarizer 38b, blue light.In addition, the green glow that is reflected by the 2nd dichronic mirror 26 is imported into the collector lens 39g that green glow is used, and with liquid crystal panel 34g and preposition Polarizer 37g, exiting side Polarizer 36g, arrives look synthetic prisms 33 via light incident side Polarizer 38g, green glow.Equally, see through the 1st dichronic mirror 25 and the 2nd dichronic mirror 26, and be imported into ruddiness collector lens 39r through the ruddiness of 2 completely reflecting mirrors 29,31 reflection, via light incident side Polarizer 38r, ruddiness with liquid crystal panel 34r and exiting side Polarizer 36r, arrival look synthetic prisms 33.
The 3 color image light that are imported into look synthetic prisms 33 are synthetic by this look synthetic prisms 33, and thus obtained coloured image light is via throwing camera lens 4 enlarging projections to the screen in the place ahead.
Optical system also is referred to as light engine, and it comprises the light engine pedestal that is used to lay said elements, and is general L-shaped and be placed in projector's housing.As the important component part of projector, its parts are various, therefore also are to reduce the quantity of using parts and the design key part that alleviates the weight of parts.
Optical mirror slip, for example lens and relay lens in use need to adjust, for example adjust up and down or about adjust, or realize simultaneously adjusting up and down and about adjust.Existing optical mirror slip is generally at first fixed one on fixed part, and fixed part is installed on the adjustment component again, adjustment component often is a metalwork, if realize simultaneously adjusting up and down and about adjust, then adjustment component is also more than one, need an adjustment component to realize adjusting up and down, and another adjustment component is adjusted about realizing.Produced more number of components like this, weight is also corresponding bigger simultaneously.
Summary of the invention
In order to solve the problem that optical mirror slip fixed adjustment mechanisms parts in the prior art are various, simplify inadequately, the invention provides a kind of projector optical lens the adjustment assembly, comprise the projector optical engine of this adjustment assembly and comprise the projector of this light engine, thereby reduce number of components, alleviate component weight, be of value to the lightweight that realizes projector.
It is as follows that the present invention solves the problems of the technologies described above the technical scheme that is adopted:
According to an aspect of the present invention, provide a kind of adjusting component of projector optical lens, comprising:
Optical mirror slip;
First adjusts support, it is installed on the light engine pedestal of projector, or be installed to and adjusting on the light engine pedestal on the second adjustment support of position, this first is adjusted support and has the fixed mechanism that is used for fixing this optical mirror slip, and and this light engine pedestal or this second adjust the adjustment operating mechanism that is formed for adjusting operation between the support, be used to limit the adjustment position-limit mechanism of adjusting direction and be used for fixing the adjustment detent mechanism of adjusting the position.
This optical mirror slip can be lens or relay lens.
In the time only need carrying out left and right or upper and lower adjustment, only need to adopt above-mentioned first to adjust support.On four direction, adjust if desired, then also need second to adjust support, this second is adjusted support and is installed on the light engine pedestal of projector, and this second is adjusted the adjustment operating mechanism that is formed for adjusting operation between support and this light engine pedestal, is used to limit the adjustment position-limit mechanism of the adjustment direction that is different from this first adjustment support and is used for fixing the adjustment detent mechanism of adjusting the position.
According to another aspect of the present invention, provide a kind of projector optical engine, it comprises above-mentioned adjusting component of projector optical lens.
According to a further aspect of the invention, provide a kind of projector, it comprises above-mentioned projector optical engine.
In the present invention, by adopt same parts realize the mount of optical mirror slip can realize again simultaneously optical mirror slip about or adjust function up and down.Material also changes resin into by original metal simultaneously.By adopting resin material to come weight reduction, simultaneously by with the fixedly assembly structure of optical mirror slip and about or adjust structure up and down and inherit on the same parts, make this structure have identical function and but reduced parts, played lightweight and double effects cheaply than former structure.
Description of drawings
Below by describing the present invention particularly with reference to the accompanying drawings and in conjunction with example, advantage of the present invention and implementation will be more apparent, wherein content shown in the accompanying drawing only is used for explanation of the present invention, and does not constitute the restriction of going up in all senses of the present invention, in the accompanying drawings:
Fig. 1 is the formation synoptic diagram of prior art projection machine optical system;
Fig. 2 is that the exemplary lens of the present invention are adjusted the position view in assembly and the light engine of relay lens adjustment assembly in projector's housing;
Fig. 3 adjusts the adjustment and the assembly structure synoptic diagram of assembly and relay lens adjustment assembly for the exemplary lens of the present invention;
Fig. 4 adjusts the local structure for amplifying synoptic diagram of assembled position for the exemplary relay lens of the present invention;
Fig. 5 a is the perspective view after the exemplary relay lens of the present invention is adjusted the support assembling;
Fig. 5 b is another perspective view after the exemplary relay lens of the present invention is adjusted the support assembling;
Fig. 6 adjusts the local structure for amplifying synoptic diagram of assembled position for the exemplary lens of the present invention;
Fig. 7 adjusts another local structure for amplifying synoptic diagram of assembled position for the exemplary lens of the present invention;
Fig. 8 a is the perspective view after the exemplary lens of the present invention are adjusted the support assembling;
Fig. 8 b is that the exemplary lens of the present invention are adjusted the perspective view after support decomposes;
Fig. 9 adjusts the local structure for amplifying synoptic diagram from another angle observation of assembled position for the exemplary lens of the present invention.
Embodiment
As depicted in figs. 1 and 2, be furnished with roughly the light engine 200 of " L shaped " in projector's housing 100, optical element is arranged in the light engine pedestal 210, and wherein adjusting assembly 400 with lens adjustment assembly 300 and relay lens is that example describes.
Shown in Fig. 3, Fig. 4, Fig. 5 a, Fig. 5 b, adjusting assembly 400 with relay lens earlier is that example describes, and adjusts about 410 needs of relay lens carry out.Relay lens is adjusted assembly 400 and is comprised that relay lens 410 and the first adjustment support, 420, the first adjustment supports 420 are installed on the light engine pedestal 210 of projector, and first adjusts support 420 has the fixed mechanism that is used for fixing relay lens 410.First adjusts support 420 has and the corresponding opening of relay lens 410 shapes, and fixed mechanism is several card bases 421 along the periphery setting of opening, and card base 421 is used for that relay lens 410 is buckled in first and adjusts support 420.Certainly, fixed mechanism is not limited to this kind mode, also can implement in other multiple mode.
First adjusts the adjustment operating mechanism that is formed for adjusting operation between support 420 and the light engine pedestal 210, adjust operating mechanism and comprise that being formed at first adjusts the draw-in groove 422 on the support 420 and be formed at support slot 211 on the light engine pedestal 210, draw-in groove 422 is substantially flush with support slot 211, the instrument that make to adopt the straight screwdriver class passes draw-in groove 422 and when inserting support slot 211, can adjust the position of support 420 with respect to light engine pedestal 210 by adjusting first about the swing instrument.Certainly the position of draw-in groove and support slot can exchange, and promptly draw-in groove is positioned on the light engine pedestal 210, and support slot is positioned on the first adjustment support 420, can realize equally adopting the instrument of straight screwdriver class to adjust.Draw-in groove 422 can be from first and adjusts the groove that forms between the adjacent cylinder 423 that stretches out support 420 sides, be formed with the conduit 212 that passes and slide therein for cylinder 423 on the light engine pedestal 210, conduit 212 middle parts are provided with the support slot 211 corresponding with draw-in groove 422, and cylinder 423 has also played the position-limiting action that the first adjustment support 420 is moved with 212 whiles of conduit like this.
First adjusts the adjustment position-limit mechanism that is formed for limiting the adjustment direction between support 420 and the light engine pedestal 210.The adjustment position-limit mechanism is included in first and adjusts the fin 424 that stretches out support 420 sides, the slotted eye (figure does not show) that reaches formation in light engine pedestal 210, and fin 424 penetrates slotted eye and moves, thereby limits the adjustment direction of the first adjustment support 420.Can certainly be opposite, in the first adjustment support, form slotted eye, and in the light engine pedestal, form fin, can realize that equally adjustment of the present invention is spacing.
First adjusts the adjustment detent mechanism that is formed for fixing adjustment position between support 420 and the light engine pedestal 210.Adjust detent mechanism comprise screw 430, first adjust the strip hole 425 that forms on the support 420, and light engine pedestal 210 that form with strip hole 425 corresponding screws (figure does not show), after adjusting, pass strip hole 425 by screw 430 and be tightened in the screw, and adjust support 420 location first.
Adjust about 410 needs of the relay lens that more than illustrates carry out, therefore only need first to adjust support 420.It is that example describes that the lens of adjusting about carrying out with needs below and adjusting are up and down adjusted assembly 300.
Shown in Fig. 6,7,8a, 8b, 9, the first adjustment support of adjusting about lens adjustment assembly 300 comprises lens 310 and is used for 320, the first adjustment support 320 is installed to the second adjustment support, 330, the first adjustment supports 320 that are used for adjusting up and down and has the fixed mechanism that is used for fixing lens 310.First adjusts support 320 has and the corresponding opening of lens 310 shapes, fixed mechanism is several card bases 326,327 along the periphery setting of opening, card base 326,327 is used for that lens 310 are buckled in first and adjusts support 320, and mounting means is identical with aforementioned relay lens mounting means.Certainly, fixed mechanism is not limited to this kind mode, also can implement in other multiple mode.
First adjusts support 320 and second adjusts the adjustment operating mechanism that is formed for adjusting operation between the support 330, adjust operating mechanism and comprise that being formed at first adjusts the draw-in groove 322 on the support 310 and be formed at second support slot of adjusting on the support 330 331, draw-in groove 322 is substantially flush with support slot 331, the instrument that make to adopt the straight screwdriver class passes draw-in groove 322 and when inserting support slot 331, can adjust first by swing instrument (for example straight screwdriver) and adjust the position of support 320 with respect to the second adjustment support 330.Certainly the position of draw-in groove and support slot can exchange, and promptly draw-in groove is positioned on the second adjustment support 330, and support slot is positioned on the first adjustment support 320, can realize equally adopting the instrument of straight screwdriver class to adjust.
First adjusts the adjustment position-limit mechanism that is formed for limiting the adjustment direction between support 320 and the light engine pedestal 210.Adjust position-limit mechanism and be included in first adjust fin 324 that support 320 1 sides stretch out, and the slotted eye 215 that forms in light engine pedestal 210 1 sides, fin 324 penetrates slotted eye 215 and moves; Simultaneously, also form same fin and slotted hole structure, thereby limit the adjustment direction of the first adjustment support 320 at the opposite side of the first adjustment support 320 and the opposite side of light engine pedestal 210.Can certainly be opposite, in the first adjustment support, form slotted eye, and in the light engine pedestal, form fin, can realize that equally adjustment of the present invention is spacing.
First adjusts support 320 and second adjusts the adjustment detent mechanism that is formed for fixing adjustment position between the support 330.Adjust detent mechanism comprise screw 340, first adjust the strip hole 325 that forms on the support 320, and second adjust form in the support 330 with strip hole 325 corresponding screws 332, pass strip hole 325 by screw 340 and be tightened in the screw 332, adjust support 330 location with respect to second and adjust support 320 with first.
The present invention is by constructional change, reduced parts and count and changed material on the basis of realizing same function, and the material of adjusting support can change resin into by original metal.The present invention simplifies miniaturization projector adjusting mechanism, reduces cost and a kind of effective means of weight reduction.
Above with reference to description of drawings the preferred embodiments of the present invention, those skilled in the art do not break away from essence of the present invention and spirit, can have multiple flexible program to realize the present invention.Below only for the preferable feasible embodiment of the present invention, be not so limit to interest field of the present invention, the equivalence that all utilizations instructions of the present invention and accompanying drawing content are done changes, and all is contained within the interest field of the present invention.
Claims (13)
1, a kind of adjusting component of projector optical lens comprises:
Optical mirror slip;
First adjusts support, it is installed on the light engine pedestal of projector, or be installed to and adjusting on the light engine pedestal on the second adjustment support of position, described first adjusts support has the fixed mechanism that is used for fixing described optical mirror slip, and and described light engine pedestal or described second adjust the adjustment operating mechanism that is formed for adjusting operation between the support, be used to limit the adjustment position-limit mechanism of adjusting direction and be used for fixing the adjustment detent mechanism of adjusting the position.
2, adjusting component of projector optical lens according to claim 1, it is characterized in that, described first adjusts support has and the corresponding opening of described optical mirror slip shape, described fixed mechanism is several card bases along the periphery setting of described opening, and described card base is used for that described optical mirror slip is buckled in described first and adjusts support.
3, adjusting component of projector optical lens according to claim 1, it is characterized in that, described adjustment operating mechanism comprises draw-in groove or the support slot that is formed on the described first adjustment support, reach and be formed at the described light engine pedestal or described second support slot or the draw-in groove of adjusting on the support accordingly, described draw-in groove and described support slot are substantially flush, make when the instrument that adopts the straight screwdriver class inserts described draw-in groove and described support slot, can adjust the described first adjustment support is adjusted support with respect to described light engine pedestal or described second position by swinging described instrument.
4, adjusting component of projector optical lens according to claim 3, it is characterized in that, described draw-in groove is for adjusting the groove that forms between the adjacent cylinder that stretches out the support side from described first, described light engine pedestal or described second is adjusted and is formed with the conduit that passes and slide therein for described cylinder on the support, and described conduit middle part is provided with the described support slot corresponding with described draw-in groove.
5, adjusting component of projector optical lens according to claim 1, it is characterized in that, described adjustment position-limit mechanism is included in described first slotted eye of adjusting the fin that stretches out the support side or formation, and correspondingly adjusts slotted eye that forms in the support or the fin that stretches out at described light engine pedestal or described second, described fin penetrates described slotted eye and moves, and adjusts support is adjusted support with respect to described light engine pedestal or described second adjustment direction thereby limit described first.
6, adjusting component of projector optical lens according to claim 1, it is characterized in that, described adjustment detent mechanism comprise screw, described first adjust the strip hole that forms on the support, and described light engine pedestal or described second adjust form in the support with the corresponding screw of described strip hole, pass described strip hole by described screw and be tightened in the described screw, and adjust the support location described first.
7, adjusting component of projector optical lens according to claim 1 is characterized in that, described optical mirror slip is lens or relay lens.
8, according to each described adjusting component of projector optical lens among the claim 1-7, it is characterized in that, described second adjusts support is installed on the light engine pedestal of projector, and described first adjusts support and second adjusts the additional adjustment operating mechanism that is formed for adjusting operation between the combination of support and the described light engine pedestal, is used to limit the additional adjustment position-limit mechanism of the adjustment direction that is different from the described first adjustment support and is used for fixing the additional adjustment detent mechanism of adjusting the position.
9, adjusting component of projector optical lens according to claim 8, it is characterized in that, described additional adjustment operating mechanism comprises being formed at described second to be adjusted draw-in groove on the support or support slot, and is formed at support slot or draw-in groove on the described light engine pedestal accordingly, described draw-in groove and described support slot are substantially flush, make when the instrument that adopts the straight screwdriver class inserts described draw-in groove and described support slot, can adjust the position of the described second adjustment support by swinging described instrument with respect to described light engine pedestal.
10, adjusting component of projector optical lens according to claim 8, it is characterized in that, described additional adjustment position-limit mechanism is included in described first slotted eye of adjusting the fin that stretches out the support side or formation, and slotted eye that correspondingly forms or the fin that stretches out in described light engine pedestal, described fin penetrates described slotted eye and can move inward being different from the second party that penetrates direction, adjusts support and second and adjusts the second adjustment direction of the combination of support with respect to described light engine pedestal thereby limit described first.
11, adjusting component of projector optical lens according to claim 8, it is characterized in that, described additional adjustment detent mechanism comprise screw, the strip hole that forms on the described light engine pedestal, and described second adjust form in the support with the corresponding screw of described strip hole, pass described strip hole by described screw and be tightened in the described screw, and adjust the support location described second.
12, a kind of projector optical engine is characterized in that, comprises as each described adjusting component of projector optical lens among the claim 1-11.
13, a kind of projector is characterized in that, comprises projector optical engine as claimed in claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100811881A CN101533209B (en) | 2008-03-14 | 2008-03-14 | Adjusting component of projector optical lens, projector optical engine and projector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100811881A CN101533209B (en) | 2008-03-14 | 2008-03-14 | Adjusting component of projector optical lens, projector optical engine and projector |
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| Publication Number | Publication Date |
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| CN101533209A true CN101533209A (en) | 2009-09-16 |
| CN101533209B CN101533209B (en) | 2012-02-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102854721A (en) * | 2011-06-30 | 2013-01-02 | 中强光电股份有限公司 | Projection device and array lens module |
| CN103777449A (en) * | 2012-10-25 | 2014-05-07 | 株式会社理光 | Illumination optical system and image projection device |
| CN105353490A (en) * | 2015-12-11 | 2016-02-24 | 中国工程物理研究院激光聚变研究中心 | Device and method for controlling optical lens installation deformation |
| CN108089276A (en) * | 2016-11-21 | 2018-05-29 | 深圳市光峰光电技术有限公司 | Optical element adjusting part goes out optical module and projector equipment |
| CN108803206A (en) * | 2017-04-26 | 2018-11-13 | 扬明光学股份有限公司 | lens adjusting mechanism |
| US11294144B2 (en) | 2019-04-10 | 2022-04-05 | Coretronic Corporation | Lens module and projection apparatus |
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| CN1353320A (en) * | 2000-11-13 | 2002-06-12 | 台达电子工业股份有限公司 | Optical lens module able to be 2D regulated |
| JP2005010284A (en) * | 2003-06-17 | 2005-01-13 | Olympus Corp | Lens device and digital camera using the same |
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| CN102854721B (en) * | 2011-06-30 | 2016-01-27 | 中强光电股份有限公司 | Projection arrangement and array lens module |
| CN102854721A (en) * | 2011-06-30 | 2013-01-02 | 中强光电股份有限公司 | Projection device and array lens module |
| US8807759B2 (en) | 2011-06-30 | 2014-08-19 | Coretronic Corporation | Projection apparatus and array lens module |
| CN103777449B (en) * | 2012-10-25 | 2016-04-27 | 株式会社理光 | Lamp optical system and image projection device |
| US9104093B2 (en) | 2012-10-25 | 2015-08-11 | Ricoh Company, Limited | Illumination optical system and image projection device |
| CN103777449A (en) * | 2012-10-25 | 2014-05-07 | 株式会社理光 | Illumination optical system and image projection device |
| CN105353490A (en) * | 2015-12-11 | 2016-02-24 | 中国工程物理研究院激光聚变研究中心 | Device and method for controlling optical lens installation deformation |
| CN105353490B (en) * | 2015-12-11 | 2018-02-02 | 中国工程物理研究院激光聚变研究中心 | A kind of device for controlling optical mirror slip installation deformation |
| CN108089276A (en) * | 2016-11-21 | 2018-05-29 | 深圳市光峰光电技术有限公司 | Optical element adjusting part goes out optical module and projector equipment |
| WO2018113422A1 (en) * | 2016-11-21 | 2018-06-28 | 深圳市绎立锐光科技开发有限公司 | Optical component adjustment assembly, light-emitting module and projection device |
| CN108089276B (en) * | 2016-11-21 | 2023-11-24 | 深圳光峰科技股份有限公司 | Optical element adjusting assembly, light emitting module and projection equipment |
| CN108803206A (en) * | 2017-04-26 | 2018-11-13 | 扬明光学股份有限公司 | lens adjusting mechanism |
| CN108803206B (en) * | 2017-04-26 | 2022-03-08 | 扬明光学股份有限公司 | Lens adjusting mechanism |
| US11294144B2 (en) | 2019-04-10 | 2022-04-05 | Coretronic Corporation | Lens module and projection apparatus |
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