CN110174809A - A kind of one chip LCD projector - Google Patents
A kind of one chip LCD projector Download PDFInfo
- Publication number
- CN110174809A CN110174809A CN201910426942.9A CN201910426942A CN110174809A CN 110174809 A CN110174809 A CN 110174809A CN 201910426942 A CN201910426942 A CN 201910426942A CN 110174809 A CN110174809 A CN 110174809A
- Authority
- CN
- China
- Prior art keywords
- light
- lcd
- phase plates
- reflecting polarized
- phase
- 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.)
- Pending
Links
- 239000003205 fragrance Substances 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 4
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 abstract description 6
- 230000010287 polarization Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005286 illumination Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- PGZUMBJQJWIWGJ-ONAKXNSWSA-N oseltamivir phosphate Chemical compound OP(O)(O)=O.CCOC(=O)C1=C[C@@H](OC(CC)CC)[C@H](NC(C)=O)[C@@H](N)C1 PGZUMBJQJWIWGJ-ONAKXNSWSA-N 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 229940061367 tamiflu Drugs 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
-
- 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
- G03B21/2073—Polarisers in the lamp house
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a kind of one chip LCD projectors, including LED light source, it is disposed with collective lighting system, luxuriant and rich with fragrance mirror, reflecting polarized wafer, LCD light valve mould group, field lens and projection lens along optical path direction, is equipped with 45 ° of phase plates between the phenanthrene mirror and reflecting polarized wafer.The present invention passes twice through 45 ° of phase plates by polarised light, make that a part of light that cannot be utilized originally, its phase is changed through 45 ° of phase plates and is utilized to a certain degree, improve light utilization, in addition, 45 ° of phase plates are realized by using low-cost quarter wave plate, either to cheap one chip LCD projector still for the LCD projector of high-quality, increased cost can be ignored, and have preferable cost performance and practicability.
Description
Technical field
The present invention relates to LCD projector field more particularly to a kind of one chip LCD projectors.
Background technique
The one chip LCD projector of ordinary meaning refers to that using a piece of full-color, transmission-type liquid crystal display be light valve, base
In Ke Le or critical illumination mode, by projection lens, by the image of light valve, enlarging projection is produced in a kind of projection on screen
Product.The projector of relatively other principle arts, single LCD projector is cheap, and production is simple, mating maturation, thus always with
Indispensable form is present in projector's low-end market, is the important component in projector market.However existing monolithic
Formula LCD projector is since it is desired that polarised light can just be such that LCD light valve works normally, therefore the natural light that light source issues has most
The light of (>=60%) cannot be utilized, and be had to part light unemployed in the natural light of light source
Effect utilizes, and must just use PCS(Polarization Conversion System, polarization conversion system) and its similar dress
It sets, but since one chip LCD projector pursues simple and absolute cost effective, the existing PCS high manufacture skill of production
Art, almost complete absence of being applied to a possibility that single LCD projector is to promote illumination efficiency.Therefore it provides one kind can be improved
Single LCD projector light utilization and structure is simple, cheap illumination efficiency technology improves mode, is that one chip LCD is thrown
Shadow machine those skilled in the art's urgent problem to be solved.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide one kind can be improved light utilization and structure letter
Single, cheap one chip LCD projector.
Technical solution provided by the invention is as follows, including LED light source, and optically focused photograph is disposed with along the optical path direction
Bright system, luxuriant and rich with fragrance mirror, reflecting polarized wafer, LCD light valve mould group, field lens and projection lens, the phenanthrene mirror and reflecting polarized wafer it
Between be equipped with a piece of 45 ° of phase plates.
Preferably, 45 ° of phase plates glue and fit in 1/4 on green plate or blank glass substrate for a piece of one side band
Wave plate, so that light vibrating shaft generates 45 ° of phase difference.
The present invention passes twice through 45 ° of phase plates by polarised light, makes that a part of light that cannot be utilized originally, warp
45 ° of phase plates are changed its phase and are utilized to a certain degree, improve light utilization, in addition, 45 ° of phases
Poor plate is by using low-cost quarter wave plate, either to cheap one chip LCD projector still to the LCD of high-quality
For projector, increased cost can be ignored, and have preferable cost performance and practicability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the preferred embodiment of the present invention basic schematic diagram；
Fig. 2 is the main view of empty Taper Pipe；
Fig. 3 is the left view of empty Taper Pipe；
Fig. 4 is the top view of empty Taper Pipe；
Fig. 5 is the structural schematic diagram of LCD light valve mould group；
Fig. 6 is basic schematic diagram of the preferred embodiment of the present invention based on empty Taper Pipe collective lighting system.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing to the present invention into
Row detailed description, the description of this part be only it is exemplary and explanatory, should not have any limitation to protection scope of the present invention
Effect.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It should be noted that term " center ", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outside" etc.
The orientation or positional relationship of instruction be based on the orientation or positional relationship shown in the drawings or the invention product use when it is usual
The orientation or positional relationship put, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion meaning
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to of the invention
Limitation.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply opposite
Importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
As shown in figures 1 to 6, the technical solution that present embodiment provides is as follows, including LED light source 1, along the optical path direction
On be disposed with collective lighting system 2, luxuriant and rich with fragrance mirror 3, reflecting polarized wafer 5, LCD light valve mould group 6, field lens 7 and projection lens 8,
45 ° of phase plates 4 are equipped between the phenanthrene mirror 3 and reflecting polarized wafer 5.
Wherein, 45 ° of phase plates can be a piece of one side band and glue and fit on green plate or blank glass substrate
Quarter wave plate, so that light vibrating shaft generates 45 ° of phase difference.
Wherein, collective lighting system 2 can be based on free form surface condenser, be also possible to lead based on hollow square cone
Light pipe (referred to as " empty Taper Pipe ") or CPC(Compound Parabolic Concentrator, compound parabolic concentrator, referred to as
CPC collective lighting system).The design and producing production of free-form surface lens is relatively simple, generally with high borosilicate bar hot pressing
Molding obtains, and of less demanding to lens, mainly the continuous of free form surface will excessively meet design, usual twenty-twenty vision as far as possible
Range estimation does not just influence installation substantially and uses quality, lens rise tolerance+0.2 without significant depressions and flaw person.It is based on
The collective lighting system of free form surface condenser is accepted or rejected in light gathering efficiency, the uniformity, each factor such as volume and cost performance, is single
Chip LCD projector most balances classical lighting method, and cost is depending on the volume size of free-form surface lens, general several members
~more than ten yuan are differed.Empty Taper Pipe is applied on one chip LCD projector history remote, especially in terms of cost, valence
Lattice are relatively most cheap, and as in Figure 2-4, generally by 4 trapezoidal aluminium sheets, (4 sheet glass reflecting mirrors are stitched together because of property empty Taper Pipe
Valence has been rarely used than low) to splice and realizes, incident side summary >=LED area, exiting side is slightly larger than LCD light valve area, at
The quality of this view aluminium sheet, thickness, depending on area etc., general several members.Empty Taper Pipe can be to some model of radiation of light source solid angle
The luminous intensity of interior lambertian distribution is enclosed, after carrying out certain segmentation, realization is secondary, carries out weight to the illuminating ray of light valve three times or repeatedly
Folded (integral), appropriate overlapping number not only can make light valve plane obtain relatively flat illumination intensity, while in theoretical efficiency
Also very high.CPC has high illumination efficiency, because light only needs primary event；CPC can make to a certain extent
The Etendue(etendue of two end faces) conservation, it is controllable to be conducive to efficiency of transmission；The vignetting of CPC and projection lens can
Facilitate complementation, promoting image illumination uniformity to constitutionally in this way has help；If light valve size is smaller, CPC is rationally designed,
Its output light angle is set directly to meet the Fno(F-number of light valve) it requires, then it can cancel luxuriant and rich with fragrance mirror 3, further make luxuriant and rich with fragrance mirror 3
Loss reduces.
Wherein, as shown in figure 5, LCD light valve mould group 6 may include incident polaroid 61, upper glass plates 62, CF film layer 63,
Liquid crystal 64, TFT(Thin Film Transisto) layer 65, lower glass plate 66 and outgoing polaroid 67.Light is from incident polaroid
61 enter, and successively pass through upper glass plates 62, CF film layer 63, liquid crystal 64, TFT layer 65 and lower glass plate 66, finally from outgoing polarisation
Piece 67 projects.Wherein, in order to reduce the temperature rise that it absorbs heat, one layer of reflecting type polarizing is added usually before incident polaroid 61
The heat absorption of incident polaroid 61 can be greatly lowered in piece, i.e. brightness enhancement film.
The working principle of present embodiment is as follows:
The natural light that LED light source 1 issues reaches the plane of incidence of quarter wave plate 4, herein after collective lighting system 2, luxuriant and rich with fragrance mirror 3
Be still natural light, continue on after passing through 1/4 wave plate 4, remain on as natural light, light continue to it is reflective partially
When mating plate 5 and the consistent light of incident side polaroid polarization axle of LCD light valve mould group 6 penetrate reflecting polarized wafer 5, and and LCD
The light that the incident side polaroid polarization axle of light valve mould group 6 is orthogonal is reflected by reflecting polarized wafer 5, this reflection light direction of travel
For with the reflection light direction that the surface of reflecting polarized wafer 5 is equivalent mirror-reflection, the light that reflecting polarized wafer 5 is reflected is
Linearly polarized light, the light that reflecting polarized wafer 5 reflects continue on after quarter wave plate 4, and polarization axle is rotated and becomes circle partially
Shake light, continues on, and enters collective lighting system 2 after passing through luxuriant and rich with fragrance mirror 3, carries out certain by collective lighting system 2 and LED light source 1
After the reflection of kind number, this light is made to turn around to advance to 6 direction of LCD light valve mould group, this some light passes through luxuriant and rich with fragrance mirror 3, wears again
After crossing quarter wave plate 4, polarization axle rotates again and switchs to linearly polarized light by circle, and after passing twice through quarter wave plate 4 back and forth, polarization axle is
Through consistent with the transmission axis of reflecting polarized wafer 5, therefore reflecting polarized wafer 5 can be passed through, thus used in LCD light valve mould group 6, from
And realize the promotion of one chip LCD projector light utilization efficiency.
As shown in fig. 6, arbitrarily defining a light ab, light ab is by spotlighting system from the light that LED light source 1 projects
2 primary events unite to Tamiflu mirror 3, the c point of reflecting polarized wafer 5 is reached across quarter wave plate 4, remains as natural light at this time.Reflection
Incident ray is separated into two linearly polarized lights orthogonal, with certain extinction ratio, and reflection by its polarization axle by formula polaroid 5
The consistent light of 5 transmission axis of formula polaroid is through the light orthogonal with 5 transmission axis of reflecting polarized wafer by reflecting polarized wafer
5 reflect after quarter wave plate 4, and phase change is rounded by line, after continuing across luxuriant and rich with fragrance mirror 3, inject collective lighting system 2 and arrive
Up to d point, e point is totally reflected to by collective lighting system 2, then advances to the f point on 3 surface of Tamiflu mirror, light is worn by the refraction of luxuriant and rich with fragrance mirror 3
Quarter wave plate 4 is crossed, phase changes again, and turns line by circle, the g point of reflecting polarized wafer 5 is reached, because passing through 1/4 twice in succession
Wave plate 4, phase be rotated to it is consistent with the axis of homology of reflecting polarized wafer 5, therefore can pass through reflecting polarized wafer 5 and obtain benefit
With.
By experiment, the utilization that quarter wave plate 4 can be obviously improved light is added between luxuriant and rich with fragrance mirror 3 and reflecting polarized wafer 5
Rate, wherein based on the collective lighting system 2 of empty Taper Pipe in the anti-of 1 surface silica gel of optical design, inner wall reflectivity and LED light source
Penetrate the reflectivity of rate, LED substrate, in the case that the factors such as the aperture opening ratio in region shared by LED wafer are same, through in different designs and
It is tested on the empty Taper Pipe of material, 7%~17% or so can be improved after quarter wave plate 4 is added between luxuriant and rich with fragrance mirror 3 and reflecting polarized wafer 5
Utilization rate.Collective lighting system 2 based on free form surface condenser is added 1/4 between luxuriant and rich with fragrance mirror 3 and reflecting polarized wafer 5
Wave plate 4 can improve 6%~10% or so utilization rate.
The present invention passes twice through 45 ° of phase plates by polarised light, makes that a part of light that cannot be utilized originally, warp
45 ° of phase plates are changed its phase and are utilized to a certain degree, improve light utilization, in addition, 45 ° of phases
Poor plate is by using low-cost quarter wave plate, either to cheap one chip LCD projector still to the LCD of high-quality
For projector, increased cost can be ignored, and have preferable cost performance and practicability.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.
Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example
It is merely used to help understand method and its core concept of the invention.The above is only the preferred embodiment of the present invention, should refer to
Out, due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the ordinary skill people of the art
For member, without departing from the principle of the present invention, can also make it is several improve, retouching or variation, can also will be above-mentioned
Technical characteristic is combined in the right way；These improve retouching, variation or combination, or the not improved design by invention and
Technical solution directly applies to other occasions, is regarded as protection scope of the present invention.
Claims (2)
1. a kind of one chip LCD projector, including LED light source (1), are disposed with collective lighting system along optical path direction
(2), luxuriant and rich with fragrance mirror (3), reflecting polarized wafer (5), LCD light valve mould group (6), field lens (7) and projection lens (8), it is characterised in that: institute
It states and is equipped with a piece of 45 ° of phase plates (4) between luxuriant and rich with fragrance mirror (3) and reflecting polarized wafer (5).
2. one chip LCD according to claim 1 projector, which is characterized in that 45 ° of phase plates (4) are a piece of
Band is viscous on one side and fits in the quarter wave plate on green plate or blank glass substrate, so that light vibrating shaft generates 45 ° of phase difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426942.9A CN110174809A (en) | 2019-05-22 | 2019-05-22 | A kind of one chip LCD projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910426942.9A CN110174809A (en) | 2019-05-22 | 2019-05-22 | A kind of one chip LCD projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110174809A true CN110174809A (en) | 2019-08-27 |
Family
ID=67691811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910426942.9A Pending CN110174809A (en) | 2019-05-22 | 2019-05-22 | A kind of one chip LCD projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110174809A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000122000A (en) * | 1998-10-15 | 2000-04-28 | Matsushita Electric Ind Co Ltd | Illumination device and image display device |
| CN101271251A (en) * | 2007-03-21 | 2008-09-24 | 北京泰德富臣科贸有限公司 | Single-slice transmission type projector system |
| CN101846852A (en) * | 2010-05-28 | 2010-09-29 | 友达光电股份有限公司 | Transflective optical module |
| CN201622432U (en) * | 2010-03-22 | 2010-11-03 | 长沙创荣电子科技有限公司 | All-sealed optical machine of single-chip liquid crystal projector |
| CN103207508A (en) * | 2012-11-14 | 2013-07-17 | 深圳市亿思达显示科技有限公司 | Liquid crystal projector |
| CN109164667A (en) * | 2018-09-03 | 2019-01-08 | 深圳小淼科技有限公司 | A kind of projector |
| CN109188840A (en) * | 2018-10-29 | 2019-01-11 | 深圳市高格投影科技有限公司 | The optical system and LCD projector of LCD projector |
| CN209842315U (en) * | 2019-05-22 | 2019-12-24 | 长沙创荣电子科技有限公司 | Single-chip LCD projector |
-
2019
- 2019-05-22 CN CN201910426942.9A patent/CN110174809A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000122000A (en) * | 1998-10-15 | 2000-04-28 | Matsushita Electric Ind Co Ltd | Illumination device and image display device |
| CN101271251A (en) * | 2007-03-21 | 2008-09-24 | 北京泰德富臣科贸有限公司 | Single-slice transmission type projector system |
| CN201622432U (en) * | 2010-03-22 | 2010-11-03 | 长沙创荣电子科技有限公司 | All-sealed optical machine of single-chip liquid crystal projector |
| CN101846852A (en) * | 2010-05-28 | 2010-09-29 | 友达光电股份有限公司 | Transflective optical module |
| CN103207508A (en) * | 2012-11-14 | 2013-07-17 | 深圳市亿思达显示科技有限公司 | Liquid crystal projector |
| CN109164667A (en) * | 2018-09-03 | 2019-01-08 | 深圳小淼科技有限公司 | A kind of projector |
| CN109188840A (en) * | 2018-10-29 | 2019-01-11 | 深圳市高格投影科技有限公司 | The optical system and LCD projector of LCD projector |
| CN209842315U (en) * | 2019-05-22 | 2019-12-24 | 长沙创荣电子科技有限公司 | Single-chip LCD projector |
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