TWM439819U - Reflective liquid crystal projection system - Google Patents

Abstract

The present invention discloses a reflective liquid Crystal projection system including a light source device, a LCOS (Liquid Crystal on Silicon) element, a PBS (Polarized Beam Splitter) element, an optical projection lens, and a light-recycling module with polarized light recycling function. The first portion of the light beams provided by the light source device are projected to the LCOS element by going through the PBS element. The second portion of the light beams provided by the light source device are recycled and the polarization thereof are transferred by the light-recycling module after going through the PBS element, and then the second portion of the light beams are projected to the LCOS element by going through the PBS element. In which, the light-recycling module includes a TIR (Total internal reflection) prism and a light polarization transformation structure. The TIR prism is arranged on the light path of the first portion of the light beams and on the light path of the second portion of the light beams simultaneously.

Description

M439819 V. New description: [New technology field] Film and television system - a kind of projection system 'especially related to a kind of reflective liquid crystal acos) cast [previous technology] In the normal life, the projection line is often made The projection of the text or image data on the projection surface makes the user more visually comfortable when viewing, and the electronic device has a design trend of light, thin and short to meet the needs of humanity, so the projection system is no exception. The terrain tends to be miniaturized, and it can be applied to electronic products such as 3G mobile phones and PDAs. The mouth can also be a small projection system that can be carried around, so that users can use the projection system to play the movies they want to enjoy, and easily achieve entertainment effects. Please refer to FIG. 1 , which is a schematic diagram of the structure and optical path of a conventional reflective liquid crystal (LC〇s) projection system. The reflective liquid crystal projection system includes an illumination device 丨丨, a collimating lens module 丨 2, a polarization separation 稜鏡 (pBS) 具有 3 with a reflective polarizing film 丨 3 中间 in the middle, a field lens 丨 4, and a reflective liquid crystal element 丨5 and the optical lens 丨6, and the polarization separation 稜鏡丨3 is disposed between the illumination device 反射 reflective liquid crystal element 15 and the optical lens 丨6, and the collimator lens module 丨2 is disposed on the illumination device π and the polarization separation 稜鏡Between 3, field 4 ¥ 丨 4 is placed between the reflective liquid crystal element 丨 5 and the polarization separation 稜鏡丨 3, wherein the collimating lens module 丨 2 and the field lens 丨 4 are used to adjust the reception thereof. The incident angle of the beam is output and the reflection in the middle of the polarization separation prism 13: The polarizing film Π1 is used to supply the -p-polar beam to penetrate and make it available: the beam is incident on the beam. Polar

Further, the 'reflective liquid crystal element 15' is used to present an electronic image display device 11 for providing the illumination source to the reflective liquid crystal element 15 so that the illumination device 11 and the reflective liquid crystal element 15 are formed between A plurality of illumination light paths, and a plurality of imaging optical paths are formed between the reflective liquid crystal element 15 and the optical lens 16, so that the electronic image frame can be displayed on the projection surface 9 by the optical lens 丨6. 'The light source provided by the illuminating device 11 is a part of the illumination beam L" which belongs to the p-polarity, and the other part is the illumination beam k which belongs to the s-difficulty, and these are the illumination beams LIP which are partial to the W and these The illumination beam k belonging to the S-polarity travels along the corresponding illumination light path. The solid arrows in the figure show the transmission paths of the partial illumination beams LIP and LIS. The illumination light provided by the illumination device 11朿k, L, s are incident on the reflective polarizing film (3) which is incident on the polarization separation 稜鏡13 after passing through the collimating ϋ group 12, and the Μ-polar 〖 光束 光束 光束 会 会 会 会 会 会 生稜鏡丨3 after casting to At the same time, the illumination beam k belonging to the S-polarity is reflected on the reflective polarization yoke (3), and then passes through the field lens M to be incident on the reflective liquid crystal element 15; then 'these are s-polar The illumination light is reflected on the reflective liquid crystal element M439819, and is converted into a plurality of imaging light beams I|P belonging to p-polarity according to the electronic image frame, and the imaging beams belonging to the P-polarity ^ is the corresponding .. /. The corresponding imaging optical path travels. The dotted arrow in the figure shows the partial imaging path, which is the transmission path of the imaging beam I|p belonging to p-polarity. The imaging beam of the reflective liquid crystal element 丨5 is incident on the polarization separation 稜鏡丨3 after passing through the field lens 丨4. Then, the imaging beam I 丨^ belonging to the p-polarity penetrates the polarization separation 稜鏡丨3 The reflective polarizing film 入射 3 丨 enters the optical lens 16 , and the electronic image frame presented by the reflective liquid crystal element 15 can be projected onto the projection surface 9 by the optical lens 丨 6 . Liquid crystal element 15 only It is necessary to provide a single polarized illumination diaphragm ′ so that the illumination beam provided by the illumination device is projected into the reflective liquid crystal element 15 , and only the illumination beam LIS belonging to the s-polarity is projected onto the reflective liquid crystal element. 15' and the polarized illumination beam ^ is thrown away from other places due to no use; therefore, the amount of light output by the optical lens is much smaller than the amount of light provided by the illumination device. It is a schematic diagram of another conventional reflective liquid crystal feeding, structure and optical path. The reflective liquid crystal projection system 2 includes an illumination device 2, a collimating lens module 22' reflective polarizer 23, and a field lens 24' reflective liquid crystal. The component ^, the light detecting sheet 28 and the optical lens 26' and the reflective polarizer 23 are disposed between the illumination device a, the reflective liquid crystal element 25 and the optical lens 26, and the collimating lens module is disposed on the illumination device and the reflective type Between the polarizers 23, the field lens 24 is disposed between the reflective 6 M439819 type liquid crystal element 25 and the reflective polarizer. The 'collimation lens module 29 is used to adjust the incident angle of the received beam and output it, and the 耵iU is nine pieces 23 for the purpose of The aurora penetrates through it and serves as a reflection. Furthermore, the reflective liquid crystal element 25 is used to present a picture of the image, and the illumination device 21 is used to provide the illumination source to the reflective liquid crystal element 25 to form the illumination device Μ and the reflective liquid crystal element 25. A plurality of illumination light paths are formed, and a plurality of imaging optical paths are formed between the reflective liquid crystal element 25 and the optical lens 26, so that the electronic image frame can be displayed on the projection surface 9 by the optical lens 26. In detail, the illumination device 2 丨 provides a part of the illumination beam L2P belonging to the P-polarity and the other part is the illumination beam L2S belonging to the S-polarity, and the illumination beam L belonging to the P-polarity (iv) (iv) The L2S system travels along its corresponding illumination path. The solid arrow in item 2 shows the transmission path of the part, the day, and the bright beam L^p ' L2S. Further, the illumination light beams L2P and L2S provided by the illumination device 21 are incident on the reflective polarizer 23 after passing through the collimator lens module 22, and the illumination light beams 12S belonging to the s-polarity are on the reflective polarizer 23. The reflection beam is generated to travel to other places, and the illumination light beam L2p belonging to the p-polarity is continuously passed through the reflective polarizer 23 and the field lens 24' to be incident on the reflective liquid crystal element 25, and the pixels are p-polarized. The illumination diaphragm l2I will reflect on the reflective liquid crystal element 25, and is converted into a plurality of imaging beams belonging to the s-polarity according to the electronic image frame, and 7 M439819 is far from the s-polar imaging beam. The 丨2s department is divided into its corresponding imaging optical path. The dotted arrow in Fig. 2 shows the transmission path of the imaging beam ^ which is s-polar. · In addition, the imaging beam from the reflective liquid crystal element 25 will be incident on the reflective polarizer 23 after passing through the field lens, and the image beam belonging to the S-polarity is square and reflective. Reflection occurs thereon, and then passes through the light detecting sheet μ to be incident on the optical lens 26', so that the electronic image frame presented by the reflective liquid member 25 can be projected onto the projection surface 9 by the optical lens 26. / It can be seen from the above 5 that the reflective liquid crystal element 25 only needs to be provided with a single polarized illumination beam, so that the illumination beam provided by the illumination 21 is illuminated, and l2s is projected into the reflective liquid crystal element 25. Only the illumination beam belonging to the p-polarity will be projected onto the reflective liquid crystal to be 6 and the s-polar illumination beam will be reflected to the stand-up due to no use. Α + ” k 成 流失 : : : : : : : The amount of light output by the lens 26 will be much smaller than the amount of light provided by the illumination device. The above is the main cause of the conventional reflective liquid crystal projection system: the conventional reflective liquid crystal projection system is known for its illumination device. The efficiency of the provided light is too high, and the light output of the device is insufficient, which does not meet the needs of the eight users, and therefore the & ° 0 progressively breaks the digital optical processing (DLP) projection system. To improve the light and use efficiency of the reflective liquid crystal projection system should be the solution. Find iV1^y8l9 [New content] The main purpose of this creation is to provide a reflective liquid crystal ( LCOS) projection system, in particular, a reflective liquid crystal projection system having a beam recovery module to reduce light loss. In a preferred embodiment, the present invention provides a reflective liquid crystal projection system comprising: a lighting device Providing a plurality of illumination beams; a reflective liquid crystal (LCOS) element 'for presenting an electronic image frame; and a polarization separation element (PBS) for receiving a first portion of the illumination beams into the illumination beam a reflective liquid crystal element, wherein the first partial illumination beam is reflected on the reflective liquid crystal element and converted into another plurality of imaging beams according to the electronic image frame; an optical lens for receiving and projecting the plurality of imaging beams The imaging beam is directed to a projection surface; and a diaphragm recovery module is provided for the second portion of the illumination beams to illuminate the beam from the oscillating light π from the component and outputting the polarity for conversion The second partial illumination beam after the polarity is again incident on the polarization separation element; wherein the έ 光束 beam recovery module includes at least a total internal reflection (TIR) 穿透 for the illumination beams from the illumination device to penetrate therethrough and for the second portion of the illumination beam from the polarization separation element to produce total reflection thereon. In a preferred embodiment, the polarizing separation element is used to supply the illumination beam 9 M439819

Any one of the p-polar beams penetrates therein, and the ammonium-S pole beam of the illumination beams is reflected thereon, and the total internal reflection 稜鏡 is disposed on the illumination device and the έ 偏 偏 偏 separation element between. In the preferred embodiment, the total internal reflection 稜鏡 includes a first 稜鏡 and a second 稜鏡, and the ρ prism has a first-human light surface and a first-right surface, The mirror has a second light incident surface and a second opposite surface, and the first opposite surface and the second opposite surface are opposite to each other; wherein the projection system has a frontal axis and a first axis The angle between the first opposing face and the illumination optical axis and the angle between the second opposite face of the second turn and the illumination optical axis are both degrees, or when the illumination device is deflected When the illumination optical axis is disposed, the side of the first rib and the side of the second cymbal are all equilateral triangles, and when the illumination device is not disposed away from the illumination optical axis, the first 稜鏡The combination of the side surface and the side surface of the second side is a parallelogram. In the preferred embodiment, the reflective liquid crystal projection system further comprises a light detecting sheet, ::, and a polarizing separation element. And between the optical lenses, to block the P-polar beams of the imaging beams When the person shoots the optical lens, or blocks any of the imaging beams from being incident on the optical lens. In the preferred embodiment, the optical recovery module further includes a light polarity conversion structure. 'The second portion of the illumination beam used to convert the polarity of the second portion of the illumination beam in the illumination illumination pupil and the self-contrast polarization 77 is rotated by the person to the total internal reflection after passing through the optical polarity conversion structure M 10 M4^9819 The optical polarity conversion structure is a 丨/2 wavelength plate.

In a preferred embodiment, the projection system further includes: in a preferred embodiment, in a preferred embodiment, a collimating tilt is disposed between the illumination device and the full-four (four) mirror

In a preferred embodiment, the optical path planning component group includes at least a trapezoidal mirror for the second portion of the illumination pupil from the polarized light separating element to pass through at least the rear person to the full Internally reflecting the second prism; wherein the light polarity switching structure is disposed between the polarized light separating element and the trapezoidal mirror, or between the ladder mirror and the second dome; or The optical path planning component group includes at least: a first reflective component and a second reflective component respectively for reflecting each of the illumination beams incident thereon; and a second focusing lens group for adjusting the Receiving an incident angle of each illumination beam and outputting the same; wherein the first reflective element is disposed between the second focusing mirror and the total internal reflection, and the light intensity on the reflective liquid crystal element And the light uniformity changes depending on the position of the second reflecting element and the tilt angle. I!

P-polarized aperture, and the second of the illumination beams

Reflecting 'where' the second portion of the illumination beam from the polarized separation element is in any of the preferred embodiments as a preferred embodiment of the p-light illumination pupil In the example, it is a first first reflection I sound.

After the component is incident on the second turn of the total internal reflection 稜鏡, and total reflection is generated on the opposite side of the second prism, wherein the optical polarity conversion structure is disposed on the polarized component, away from the component Between the first reflective element and the first reflective element, or s between the first focusing element and the second focusing element, or between the second focusing lens group and the second reflecting element, or And disposed between the second reflective element and the second ridge. In a preferred embodiment, any one of the first partial illumination beams of the illumination beams is an s-polar beam, and any one of the illumination beams is the second portion of the illumination beam. All are connected to a P-polar beam. In a preferred embodiment, the optical path planning component group further includes: a second reflective component for generating an inverse 12 M439819 shot for each illumination beam incident thereon, and a second ♦ focal focus group, respectively Adjusting the incident angle of each illumination light received by the illumination light, and outputting the second partial illumination beam from the polarization separation element sequentially through the third focusing mirror group, the first reflective component The third reflective element, the first hydrofocal lens group and the second reflective element are incident on the second pupil of the total internal reflection pupil, and the second illumination surface of the second pupil A total reflection is generated thereon; wherein, the light pole ht is changed between the third focusing mirror group and the first reflecting mirror, or 疋. And between the first reflecting element and the third reflecting element, or between the third reflecting element and the m mirror, or the second focusing lens group and the second reflection Between the elements is either disposed between the second reflective element and the second turn. In a preferred embodiment, the illumination device has a light source (four), and the light source is a light emitting diode (LED) light source or a high pressure gas light source ((4)), and the light source is illuminated. Between the twist and the stiffness; wherein the illumination device is disposed at the illumination green or is biased to the side of the illumination optical axis. In a preferred embodiment, the present invention also provides a reflective liquid crystal projection system comprising: - an illumination device for rotating a plurality of illumination beams belonging to a first polarity and a second plurality of : Polarized illumination light east; 13 M439819 % - Reflective liquid crystal (LCQS) ^t piece for presenting - an electronic image frame and optionally - an illumination beam projected onto the reflective liquid crystal element is attached to the reflective liquid crystal element A reflection is generated and converted into an "imaging beam" due to the electronic image frame; an optical lens; and a beam portion _ group is disposed between the illumination device, the reflective dislocation element, and the optical lens, the beam The processing module is purely received - belongs to the first polarized illumination beam and is output to the reflective liquid crystal element, and receives any illumination beam belonging to the second polarization and converts the polarity to rotate to the reflection The liquid crystal element 'and receives the imaging beam and outputs it to the optical lens; wherein 'the beam processing module includes at least _ total internal reflection (10)) 稜鏡, and the whole The shooting system is simultaneously disposed on the transmission path of the illumination beam belonging to the second polarity on the polarity after being converted, and is disposed on the first polarity and the mth photo that are output from the illumination device. On the transmission path of the bundle. In the case of a preferred embodiment, the beam processing module further includes a polarization separation element (PBS) for supplying the — 桎 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , A reflection is generated thereon, and the inner reflection of the king is disposed between the illumination device and the polarization separation element. In the example of K, 'the total internal reflection 稜鏡 includes - the first 稜鏡 and the second 稜鏡, and the first 狭 ra 夂 & 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一 有一The ancient mystery-a prism has a light-emitting surface and a second opposite surface; wherein the first opposite surface and the second opposite surface are smaller than a, wherein the projection system Forming an illumination optical axis of 14 M439819, and a lost angle between the opposite surface of the first phase of the first phase and the illumination optical axis and the second opposite surface of the second illumination and the illumination light The angle between the axes is 45 degrees, or when the illuminating device is disposed away from the illumination optical axis, the first 恻 surface and the second — side 胄 &; ^ right angle A square shape, but not when the illumination device is not positioned away from the illumination optical axis. Also placed in the sun, the combination of the side of the younger brother and the side of the second jaw is a parallelogram. Preferably, the beam processing module further includes a light detecting sheet disposed between the pair of polarizing elements and the polarized light beam of the optical lens to be incident on the light The light beam is incident on the optical lens, or is blocked in a preferred embodiment. In a preferred embodiment, the beam processing module further includes a light polarity switching structure for converting the polarity of the illumination beam belonging to the second polarity. And the illumination beam of the second polarity outputted from the polarization separation element is incident on the total internal reflection 后 after passing through the light polarity conversion structure. In the preferred embodiment, the optical polarity conversion structure is a 1/2 wavelength plate. In a preferred embodiment, the aperture processing module further includes an optical path planning component group for changing a transmission direction of the illumination beams belonging to the (four) two polarities from the polarization separation component. In a preferred embodiment, the beam processing module further includes: a collimating lens group disposed between the illumination device and the total internal reflection , for riding each of the received illumination beams The person shoots the angle and outputs it; and 15 the first 1 focus lens group, between which is used to adjust the contact thereof, and the total internal reflection 稜鏡 and the polarization separation element are incident on each of the illumination beams. Angle and output. - In the embodiment, the optical path planning component group includes: at least: the illumination beam from the second polarity from the polarization separation S component is at least passed through and then incident on the optical path The second 稜鏡 of the total internal reflection 稜鏡; the middle 4 light polarity conversion structure is disposed between the polarization separation member and the trapezoid k or is disposed between the ladder mirror and the second ridge; Or the optical path component group includes at least: a first reflective component and a second reflective component for respectively reflecting each of the illumination beams incident thereon; and a second focusing mirror for adjusting The incident angle of each illumination pupil received is outputted; wherein the second reflective component is disposed between the second focusing mirror and the total internal reflection ' and the reflective liquid crystal element The light intensity and the light uniformity are varied depending on the position of the second reflecting element and the tilt angle. In a preferred embodiment, any of the illumination beams belonging to the first polarity are one 丨3 pole-polar light, and any illumination beam belonging to the second polarity is an s-polar beam. In a preferred embodiment, the first reflective element and the second reflective element are respectively a first first mirror and a second mirror or the first reflective element 16 M439819 and the second The reflective elements are respectively a first reflective polarizer and a second reflective polarizer, and the first reflective polarizer and the second reflective polarizer are respectively used to penetrate the ρ and ρ polarized beams. Wherein any s-polar beam of light is reflected thereon, wherein the light-emitting elements of the polarized light separating element belong to the second polarity, and at least through the first reflective element The second focusing mirror group and the second reflecting element are incident on the second cymbal of the total internal reflection 稜鏡, and

The total reflection is generated on the opposite side of the β-the same; wherein the light polarity conversion structure is disposed between the polarized light separating element and the first reflective element, or is the second reflecting element disposed on the opposite side Between the mirror groups, whether it is disposed between the second focusing mirror group and the second reflecting element, or between the second reflecting element and the second cymbal. Yu Yi

The illumination beam is in a P ^ f h example, and any of the illumination beams belonging to the first-polarity are S-polarized light, and any of the second-polar polarized beams.

In a preferred embodiment, a third reflective element, and the optical path planning component group further includes: an illumination unit for incident on each of the illumination & beam generating an inverse second focusing lens group, respectively Taking the angle of incidence of each illumination beam received by the mosquito 苴 η η and outputting it; ', 卜' from the polarization separation element ten < 6 Hai belongs to the second polarity of the illumination light system in order After the third focusing brother, and the 8th first reflecting element, the third reverse 17 M439819 element 4, the first focusing button set and the second reflecting element are incident on the second reflection of the total internal reflection bobbin And generating total reflection on the second person's light surface of the second layer; wherein the 'light (four) conversion structure is disposed between the polarization separation element and the third focusing lens group, or is disposed in the first Between the three focusing mirrors and the first reflecting element, or between the first reflecting element and the third reflecting element, or between the third reflecting element and the second focusing mirror, Or is it set to the second focusing mirror group and the first Between the reflective member, or is disposed between the second element and the second reflective Prism. In a preferred embodiment, the illumination device has a light source, which is a light-emitting diode (LED) light source, or a high-pressure gas gauge (UHp), and the light-emitting range of the light source Between the twist and 18 degrees; wherein the illumination device is disposed at the illumination optical axis or is disposed on one side of the illumination optical axis. [Embodiment] Please refer to FIG. 3, which is a schematic structural diagram of a creation projection system in a first preferred embodiment. The projection system 3 includes a lighting device 3, a beam processing module 32, a reflective liquid crystal (LC〇S), a t-piece 33, and an optical lens 34. The illumination device f 31 has a light source, and the light source can be a light-emitting device. A polar (cafe) light source, or a high-pressure gas source (1) Η P), X. The light source has a wide range of illumination, preferably, the electro-optic source of the illumination source! Ihi is between #1 and 8G degrees, and the illumination device can be placed at the light axis of 18 M439819 or at the side of the illumination optical axis. Moreover, part of the light source provided by the illumination device 3! is an illumination pupil m belonging to p-polarity, and the other part belongs to s-polarization. 曰_...' 昍 朿 朿 L3S, and reflective 液 liquid 33 is used to present an electronic image frame, and only needs to be provided with P-polarity, that is, the reflective liquid crystal cells 3 do not need to belong to the s-polar illumination beam. Furthermore, the beam processing module 32 includes at least a beam recovery module 321 and is disposed between the illumination device 31, the reflective liquid crystal element 33, and the optical lens unit ,, the illumination device 3 丨 provides the day s bright beam, ^ Α . , , ... The 庀 会 入射 入射 入射 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束 光束The illumination diaphragm 进而 is further outputted to the reflective liquid crystal element 33. The illuminating light is incident on the reflective liquid crystal element 33, and the illumination light J 312 which is P-polarized, and the reflective liquid crystal element 3 3 are generated. Reflecting and responding to electronic imagery It is converted into a read beam 13 s belonging to the s riding, and the imaging beam of the (4) s bias is incident on the optical lens after passing through the beam processing module 32, and the optical lens 34 receives the imaging. The light beam 13S is projected onto the front surface and then the electronic image frame presented by the reflective liquid crystal S member 33 can be displayed on the projection surface. The implementation aspect of the application, but not the application scope of 19 ^ 439819, and any skilled person can be inspired by the following implementations and any equal changes according to the actual application requirements. It is the specific -, "" of the projection system shown in FIG. 3 in the first embodiment. In the projection system 3 A of the present embodiment, the pupil processing module J2 includes a collimating lens module 322 and a first focusing lens group in addition to the above-mentioned diaphragm recovery module 32 323, a polarization separating element (pBS) 324 and a light detecting sheet, and the beam recovery module 321 includes a total internal reflection (T1R) 稜鏡 3211, a light polarity switching structure 3212, and an optical path planning component group 32 丨 3. The 'collimation lens module 322 is disposed between the illumination device 31 and the total internal reflection 稜鏡1丨, and the first focusing lens group 323 is disposed between the total internal reflection 稜鏡32丨1 and the polarization separating element 324, and the polarization separation is performed. The element 324 is disposed between the first focusing mirror group 323 and the reflective 'night as element 33, and the light detecting sheet 325 is disposed between the polarizing separating element 324 and the optical lens 34. In the first embodiment, the total internal reflection 稜鏡3211 includes a first 稜鏡32丨丨丨 and a second 稜鏡32115, and the first 稜鏡32111 and the second 稜鏡32U5 are both triangular 稜鏡, and The first type of mirror 32 has a first light incident surface 32n2, a first opposite surface 32113, and a first surface 32114 between the first light incident surface 32丨丨2 and the first opposite surface 32n3. The second 32稜鏡5 has a second light incident surface 32丨丨6, a second opposite surface 32117, and between the second light incident surface 32丨丨6 and the second opposite surface 32丨7 a second face 32118, wherein the first opposite face J2丨丨j of the first turn 321η is opposite to the second opposite face 32丨丨7 of the second turn 32丨15, and the two 20 M439819 There is a gap between the two. Further, the polarized light separating element 324 is used for any light beam belonging to the P-polarity to penetrate therethrough, and any light beam belonging to the S-polarity is reflected thereon, and only the P-bias is generated. The polar light can penetrate the polarized light separating element 3 24; conversely, the loose light piece 3 2 5 is used to block the light beam belonging to the p-polarity from penetrating therein, and only allow. The light source of the S-polarity can penetrate therethrough, and its main purpose is to filter the beam of the non-sense 4c into the optical lens 34'. However, the photodetector 3 2 5 is not a necessary element for defining the embodiment. And ‘through the $ brother model 3 2 2 and the first focusing lens group 3 2 3 are used to adjust the incident angle of the received beam and output it, and through the collimator lens module 322 and the optical path planning component group

The angle of incidence of the illumination beam is turned out. » The circumference of the output and the output pupil are all located within a small angle range, and the 3213 is used to change and regulate the transmission direction of the illumination beam receiving module 32 1 belonging to the 8-polarity. In this embodiment, The first reflective element 32131 and the supplementary description are that, in the first embodiment, the second reflective element (four) A can be - the first first mirror and the second reflection respectively. The brother can also be the first-reflective polarized light. a sheet and a second reflective polarizer; in the basin, the first reflective polarizer and the first: reflective polarizer are divided into continents for allowing -P, a polarized aperture to penetrate therein and supplying a -s polarized beam A reflection is generated thereon.

Light spit tV change, .'. The structure j2 1 2 is used to enter the pupil recovery module 32] and belongs to the S-polarized illumination pupil as the illumination beam J of the polarity ,), > 2, W, and the polarity of the light The conversion structure 3212 can be a 丨/2 wavelength plate 'and is not disposed between the second reflective element 32 Π 2α and the total internal reflection prism 32H, and is not limited thereto. For example, the light polarity conversion junction 32 丨 2 can also be set in Between the polarized light separating element 324 and the first reflecting element 32|31, or between the first reflecting element 32131 and the second focusing lens group 32133, or the second focusing lens group

Between 32m and the second reflective element 32I312A (the above-mentioned changes are not shown in the design drawings), the main purpose is to recover the beam recovery mode group 321 and enter the total internal reflection k 2 1 1 1 Both knowing and bright light can be p-polarized illumination beams. Next, the operation of the projection system 3A in the present embodiment will be described. The illumination beam provided by the illumination device is sequentially passed through the collimating lens module 322, the first light incident surface 322 of the first weir 32111, and the first opposite surface w第 of the first 32in丨3, the second opposite surface 32丨丨7 of the second 稜鏡32丨丨5, the first acute surface 32118 of the second 稜鏡32u5, and the first focusing mirror group 323 are incident on the polarization separating element d4′, belonging to p The polarized illumination pupil is passed through the polarizing separation element 324 and is incident on the reflective liquid crystal element 3 3 ', and the illumination beam belonging to the s-polarity is reflected on the 22 L439819 light separation 7L member 324. And continuing to pass through the first reflective element j21j1, the second focusing mirror group 32丨33 'the second reflecting element 32Π2α and the light polarity switching structure 3212, and then converted into an illumination diaphragm belonging to the Ρ-polarity. Then, the illumination light beams L3i>2 which are t Ρ polarized are entered into the second 稜鏡321 15 ′ by the second light incident surface j21 丨 6 of the second 稜鏡 32115 and are generated on the second opposite surface 32 丨丨 7 The reflection is again incident on the second separation mirror surface 321 18, the first ... s. j_3 after passing through the second 稜鏡321丨5, and is incident on the polarization separating element 324, so that it can be passed through the polarization separating element 324 and projected to the reflection. Liquid crystal element 33. Four other illumination beams belonging to 丨3, which are polarized, ΐ^ρ|, L3p2, projected onto the reflective liquid 曰曰, will produce reflections, and will be converted into S-predicted |± images in response to the electronic image. The light beam 丨π, and the image light beams belonging to the $bias polarity are again incident on the polarization separating element 324, and the reflection light is generated on the polarization separating element 324. The gray teeth are incident on the optical lens 34 after passing through the light detecting sheet 325. Optical lens 34

And = and the imaging beam 丨π is radiated, so that the image of the shirt image presented by the reflective liquid crystal element 33 is projected onto the projection surface 9. hSpecially stated, based on the Snell's law (Sndl.sLaw), the beam-beam 疋^ 适 的 的 人 人 人 人 人 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115 115第二32丨丨5 the second opposite face 32丨丨7, otherwise it will produce total reflection at the second 稜鏡n;, the first opposite face 32丨丨7: Similarly, any beam is appropriate The person shoots the angle to the person: the second opposite face of 稜鏡32丨15 3, J Γ方' the second opposite face 32丨丨7 of the first 稜鏡32丨丨5 produces total reflection, 23 M439819 Otherwise, the second opposing face 321丨7 of the second prism 32115 will be worn. Among them, the Syner's Law is known to those skilled in the art, so it will not be repeated here. Therefore, the illumination light beams Lp, Lis belonging to the p-polarity and belonging to the S-polarity output from the illumination device 31 in the present embodiment are self-owned by the light polarity conversion structure 32 1 2 The polarized illumination beam l3s is converted into a p-polar illumination beam 丨1>2', although it is incident on the transmission path to the second opposite face 32 of the second 稜鏡32 I 1 5 of the total internal reflection prism j 2 1 1丨丨7, but the creation is by adjusting the heart, the device 3 1 , the collimating lens module 3 22 , the first focusing lens group 323 , the first reflecting element 32131 , the second focusing lens group 32133 and/or the second reflection The position of the element 32] 32a, or the relative positional relationship between any of the above elements, or the first internal knowledge of the total internal reflection edge j _ 丨 1 > 2 2 丨 1 丨 and the second 稜鏡 3 21 丨The shape of 5, and the angle of incidence of any suitable illumination beam when it is incident on the second opposing face 32117 of the second 稜鏡32丨丨5, can be made such that the total internal reflection prism 2] The first opposing face 32丨丨7 of the second J-丨丨5 is still capable of providing the output from the illumination device 31 The illumination beam hn belonging to the P-polarity and the illumination pupils π belonging to the s-polarity penetrate therein, and provide the λ and I are born by the light polarity conversion structure κ丨2, and the day. The illumination beam of the bright beam k-converts & p-polarity produces a reflection thereon. The illumination device 3 is disposed away from the illumination optical axis 35 of the projection system 3A, and the side of the first reflection edge 3222 of the S reflection edge 3211 is a right triangle with the white side of the second prism, as shown in FIG. Shown. Or, the illumination device 24 M439819 3丨 is not provided offset from the illumination optical axis 35 (not shown), and the first side 32全 of the total internal reflection 稜鏡32丨丨 and the second side The combination of the sides of 32115 is a parallelogram (not shown). Furthermore, in order to avoid the illumination beam L3l>i, hs which directly penetrates the second opposite surface 32丨17 of the second prism 32丨丨5 and the illumination beam which is reflected on the second opposite surface of the second pupil 332, The second surface 321 丨 8 of the second 321 丨 5 loses symmetry at the output, causing an asymmetrical aberration when the electronic image frame presented by the reflective liquid crystal element 33 is imaged on the projection surface 9, thus Under the premise that the illumination device 3 is disposed away from the illumination optical axis, the angle between the first opposite surface 32丨丨3 of the first 稜鏡32丨1丨 and the illumination optical axis 35 in the present embodiment and the second The angle between the second opposing surface 32117 of the 稜鏡32u5 and the illumination optical axis 35 is 45 degrees. As can be seen from the above description and comparison of the projection system 2 of the prior art, when the light amounts of the illumination sources provided by the illumination devices 31 and 21 are the same, the projection system 3 A of the present embodiment can project the polarization to the polarized light. The illumination beam Lls on the separation element 3 2 4 and the pupil-reflected illumination beam, that is, the illumination beam not required by the reflective liquid crystal element 33 is recovered and converted and then reused, so that the projection system 3A of the present embodiment can make the optical lens 34 More imaging beams y are received, thereby increasing the optical flow output from the projection system. Please refer to FIG. 5' which is a schematic diagram of a specific structure and an optical path of the projection system shown in FIG. The projection system of the present embodiment is substantially similar to the projection system 3A of the foregoing z-th embodiment, and the difference between the 25 M439819 and the first embodiment is that the optical path is different. The planning component group; 2) 3 includes a first reflective component 32丨31, a second reflective component 3213213, and a second focusing mirror 32丨33; wherein the position and angle of the second reflective component 32132B are changed ( The dashed line shows the position and angle of the first reflective element 32132a in the first embodiment, so that the illumination beam subordinate to the s-polarity is converted into the illumination beam of the P-polarity. The position where total reflection occurs on the second opposing surface 321 17 of the second 稜鏡 3 2 n 5 further enhances the light intensity and uniformity of light on the reflective liquid crystal element 33. Please refer to FIG. 6' which is a schematic diagram of the specific structure and optical path of the projection system shown in FIG. 3 in the third embodiment. The projection system 3C of the present embodiment is substantially similar to that of the projection system 3A of the first embodiment described above, and will not be further described herein. The present embodiment differs from the foregoing first embodiment in that the first reflective element 32 丨 3 in the first preferred embodiment and the second focusing mirror 32 丨 33 and the second reflective element 32 132A The image is replaced by a trapezoidal mirror 32134 of the projection system 3C of the embodiment; wherein the photopolarity conversion structure 3212 is disposed between the trapezoidal mirror and the second crucible 32115, or between the trapezoidal mirror 32134 and the polarized light separating component 324. . Please refer to FIG. 7 ' which is a structural block of the second preferred embodiment of the present creative projection system. The projection system 4 includes a lighting device 4, a light processing module 42, a reflective crystal (LCOS) element 43 and an optical lens 44. The illumination device 4 has a light source, and the light source can be a light emitting diode. (LED) light source, or - high voltage 26 M4J9819 milk light source (UHP)' and the light source has a wide range of light, preferably the light source of the bamboo shoot light source range between ° degrees and 18 degrees, and the illumination The setting can be set: according to the moonlight sleeve or biased to one side of the illumination optical axis. And the light source provided by the device 41 is a part of the illumination beam belonging to the p-polarity 吣3 4 is an illumination beam belonging to the s-polarity [(5) and the reflective liquid crystal element 43 is used to present the -f sub-image f face, and only need to be provided to belong

The m'J beam, that is, the reflective liquid crystal element 43, does not require an illumination beam belonging to p-polarity. Furthermore, the beam processing module 42 includes at least one aperture, a group of people, a lighting device 41, and a Μ-V·, a 3⁄4曰-slave, a sputum liquid, a 3D element, and an optical lens 44. Between the illuminating device 41, the epoch ω soil, ',,,?, the moon beam 匕 servant, U 丨 SI will be incident on the beam processing module 42 'the S-polarized illumination beam L (5) is directly The illumination beam that is output to the reflective liquid crystal element 43' and whose phase P is polarized is converted into an illumination beam belonging to the S-polarity by the beam recovery module, and is further output to the reflective liquid crystal element 43. Further, any illumination diaphragm hsi匕' (5) that is projected to the reflective liquid crystal element 43 and belongs to the s-polarity will be reflected on the reflective liquid crystal element 43 and converted into P-polarity in response to the electronic image frame. The imaging apertures, and the imaging beams belonging to the polarities are incident on the optical lens 44 after passing through the beam processing module 42, and the optical lens 44 receives the imaging beams. The projection image is projected onto a projection surface, and the electronic image frame 27 M439819 presented by the reflective liquid crystal element 43 can be displayed on the projection surface. The embodiments of the preferred embodiment are exemplified below, but the scope of application of the present invention is not limited thereto, and any person skilled in the art can obtain the following several embodiments to realize the application and the actual application requirements. Make any equal change design. Please refer to FIG. 8, which is a schematic diagram of the specific structure and optical path of the projection system shown in FIG. 7 in the first embodiment. In the projection system 4a of the present embodiment, the beam processing module 42 further includes a collimating lens module 422, a first focusing lens group 423, a polarization separating element (PBS) 424, and the like, including a beam recovery module 421. The light detecting sheet 425; wherein the 'light recovery module 421 includes total internal reflection (TIR) 稜鏡 4211, a light polarity conversion structure 42 丨 2, and an optical path planning element group 42 1 3 . The 'collimation lens module 422 is disposed between the illumination device 41 and the total internal reflection 稜鏡 4211. The first focusing lens group 423 is disposed between the total internal reflection 稜鏡 4211 and the polarization separating element 424, and the polarization separating element 424 is disposed. The light detecting sheet 525 is disposed between the reflective liquid crystal element 43 and the light detecting sheet 425, and is disposed between the polarized light separating element 424 and the optical lens 44. In the projection system 4A of the first embodiment, the 'total internal reflection 稜鏡 42 1 丨 includes a first 稜鏡 42111 and a second 稜鏡 42115, and the first 稜鏡 4211 丨 and the second prism 42115 are both triangular 稜鏡And the first 稜鏡42丨丨丨 has a first light incident surface 42 1 1 2, a first opposite surface 42 1丨3, and a first light incident surface 42 1 1 2 and a first opposite surface 42丨The first side 42 丨丨 4 between the 丨 3, and the second 稜鏡 421 15 has a second light incident surface 42116, a second opposite surface 42117, and a second light incident surface 42 丨 16 28 and The first opposing face 42丨丨3 of the second turn 42丨丨丨 between the opposite faces 42丨i7 is disposed opposite the second tether and has a gap therebetween.

In addition, the polarized light separating element 424 is used to allow any beam belonging to the p-polarity to pass through the beam and to provide a light beam on which the light beam of the s-polarity is reflected, that is, only belongs to the erbium. Penetrating the polarized light (four) piece 424; on the contrary, the 'light-measuring piece 425 is used to block the light beam belonging to the 8-polarity from penetrating therein, and only the light-emitting element belonging to the P-polarity can penetrate the light-detecting piece core, and the main The purpose is to pass the blasphemy, the non-essential light Geng who is aunt and the mother to stop 5S, the choice of light thousand 1 brothers master 3 ό 'only the light film 425 is not the necessary elements to limit the implementation of this embodiment.

The face 42 丨丨 8 ′, wherein the second opposite face 42H 7 of the first 稜鏡 42 丨丨 5 is 'collimated', the mirror module 422 and the first focusing mirror group 423 are both used to adjust the aperture of the received lens The angle of the human shot is rounded out, and the beam is adjusted by the (four) straight lens module and the output beam is located in a small angle range, and the optical path planning component group 4"j is used to change and the 彳 is ρ bias The illumination beam 丨1 enters the direction of the transmission of the beam recovery group k 42. In this embodiment, the optical path planning component group 4 includes a first reflection element 42m, a second reflection element 42132, and a third reflection element 42134. 'Second focus, mirror group 42133 and third focusing mirror group 42丨35; wherein 'the third focusing mirror group 42135 is disposed between the polarization separating element 424 and the first reflecting element bucket, and the second reflecting element 42134 is disposed at Between the first reflective element 4213丨 and the second focusing mirror group 42133, and the second reflective element 42132 is placed between the second focusing mirror group 4-3 the inner reflection prism 4 2丨丨; Reflecting element 4 3丨, 29th M439819 second reflecting 7C piece 42132 and third reflecting element 42丨34 The two focusing mirrors 42A and the third focusing mirrors 42135 are respectively used to adjust the incident angle of each illumination beam received by the illumination lens, and the second focusing lens group 42135 is respectively used to adjust the incident angle of each illumination beam received by the illumination lens. Take out. Moreover, the light polarity switching structure 42丨2 is used to convert the illumination light 朿L叩 entering the beam recovery module 421 and belonging to the P-polarity into the illumination light 朿Us that belongs to the S-polarity in the present embodiment. The light polarity conversion structure can be 42 丨 2 as a 1 /2 wavelength plate, and is disposed between the second reflective element 42132 and the total internal reflection 稜鏡 4211, but is not limited thereto. For example, the light polarity conversion structure 42 丨 2 It can also be disposed between the polarizing separation element 424 and the third focusing lens group 42丨35, or between the third focusing lens group 42135 and the first reflective element 4213丨 or disposed on the first reflective element 4213. Between the third focusing element 42134 and the second reflecting element 42132, or between the second focusing element 42134 and the second focusing element 42132 (or between the second focusing element 42134 and the second focusing element 42132) The above-mentioned changes in the design, the drawings are not shown) 'The main purpose is to make the illumination beam recovered by the beam recovery module and enter the total internal reflection 稜鏡 42 1 1 can be the s-polarity illumination diaphragm. Next, the operation of the projection system 4 A in the present embodiment will be described. The illumination apertures L4p, L(5) provided by the illumination device 4 are sequentially passed through the collimating lens module 422, the first light incident surface 422 of the first 42稜鏡1, and the first 4211 The first opposing surface 421 13 of the crucible, the second opposing surface 42丨丨7 of the second crucible 42丨15, the second crucible surface 42丨丨8 of the second crucible 421 15 and the first focusing mirror group 423 are incident rearward To the polarized light 30 M439819 fi, the element 424 belongs to the S-polarized illumination beam L, the ISI is reflected on the polarization separation element 424, and is then projected onto the reflective liquid crystal element 43, and the illumination beam belonging to the P-polarity is directly Passing through the polarizing separation element 424, and continuing through the second focusing mirror group 42135, the first reflecting element 4213, the third reflecting element 42丨34, the second focusing mirror group 42133, the second reflecting element 42132, and the light polarity switching After the structure 42 1 2 is converted into an illumination beam belonging to the s-polarity, then the illumination light 属于1 belonging to the S-polarity; |S2 is entered into the second 由 by the second light-incident surface 42116 of the second 稜鏡42丨丨5, And generating total reflection on the second opposite surface 42n7 to re-wear through the second 稜鏡 42丨The second pupil face 42n8 of the crucible 5 and the third focus surface J and 423 are incident on the polarization separation element 424, and further, can be reflected by the polarization separation 7C member 424 and projected onto the reflective liquid crystal element 43. Moreover, the illumination light beams 1 belonging to the S-polarity are also reflected on the reflective liquid crystal 7L member 43 and converted into the imaging apertures belonging to the 丨3 polarity in response to the electronic image frame. And the imaging beam belonging to the p-polarity is again projected onto the polarization separating element 424 and passes through the polarization separating element 424, thereby being able to pass through the light detecting sheet 425 and then incident on the optical lens 44, the optical lens 44 then receives and pulls out some of the imaging beams, so that the electronic image frame presented by the reflective liquid crystal element 43 is projected onto the projection surface 9. In particular, based on the Sne丨丨's law (Sne丨丨, s Law), any beam that is incident on the second opposing face 42 n 7 of the second turn 42 n 5 at a suitable angle of incidence is permeable. The second opposite face 42丨丨7 of the second 421 15 , otherwise it will be at the second 稜鏡 31 M439819. Similarly, any beam of light will be totally reflected on the second opposite face 42 丨丨 7 of 42 1 I 5 ; A suitable human incident angle is incident on the second opposite face slit of the second shot 42n5, and then a total reflection is generated on the second opposite surface 42丨丨7 of the second prism 42丨丨5, otherwise the second edge is penetrated. The second opposite face 42 n 7 of the mirror 42 1 15 . Among them, the Syner's Law is known to those skilled in the art, so it will not be repeated here.

Therefore, in the embodiment, the illumination light beams from the illumination device 4 are the p-polarized and the S-polarized illumination beams ^, L(5) and the light-polarity conversion structures 4 2丨2 The illumination beam L^2' which is converted into the s-polarity of the illumination beam which belongs to the P-polarity is incident on the transmission path to the opposite surface 42 1丨7 of the second 稜鏡42 1丨5, but Creation by adjusting the illumination device 4丨, the collimation translating group 422 'the first focusing mirror group 423, the third focusing mirror group 42丨35, the first reflecting element 42131, the third reflecting element 42丨34, the second focusing mirror The position where the group 42133 and/or the second reflective element 42132 are disposed, or the relative positional relationship between the above two elements or the shape of the first 稜鏡 4211 丨 and the second prism 421 15 of the total internal reflection prism 421 1 And adjusting and planning the incident angle of any suitable illumination beam to the second opposite surface 4 2 I 1 7 of the second sharp edge 4 2 1 1 such that the second edge of the dream 4211 5 The opposite surface 421丨7 can still supply the photos of the P-polarity output from the illumination device. The pupil, and the s-polar illumination light penetrates through the 'and the illumination beam that is subordinated to the P-polarity illumination light 朿L<IP to the S-polarity by the light polarity conversion structure 4212 The pine produces a reflection on it. Preferably, the illumination device 4 is disposed offset from the illumination optical axis 45 32 M439819 of the projection system 4A and the side of the first 稜鏡 42n 全 of the total internal reflection 稜鏡 421 与 and the side of the second 稜鏡 4 丨 1 丨 5 They are all right-angled, which is shown in Figure 8. Or is the 'lighting device 41 not provided off the illumination optical axis 45 (not shown), and the total internal reflection 稜鏡 42 丨 稜鏡 稜鏡 丨丨丨 丨丨丨 丨丨丨 丨丨丨 丨丨丨 侧面 侧面 侧面 侧面 侧面The combination of the sides of 5 is in the form of a parallelogram (not shown). Furthermore, in order to avoid direct penetration of the second opposing face 421丨7 of the second 稜鏡42Π5, the illuminating beam, the L<isi and the second opposing face 42丨1 of the second 稜鏡42丨15 7 The illuminating pupil 产生1μ of the second 稜鏡42丨丨5 of the second 稜鏡42丨丨5 loses symmetry when outputting, causing the electronic image frame presented by the reflective liquid crystal element 43 to be projected on the projection surface 9. In the case of imaging, asymmetrical aberration occurs. Therefore, under the premise that the illumination device 41 is disposed away from the illumination optical axis 45, the first opposite face 42丨13 of the first prism 42丨丨丨 in the present embodiment is The angle between the illumination optical axes 45 and the angle between the second opposing faces 42 1 1 7 of the second turns 42丨丨5 and the illumination optical axis 45 are both 45 degrees. From the above description and comparison of the projection system of the prior art, when the light amounts of the illumination sources provided by the illumination devices 4A, 1 are the same, the projection system 4 A of the present embodiment can The illumination light beam L projected onto the polarization separating element 424 and passing through the polarization separating element 424 is used, that is, the illumination diaphragm 不需要 that is unnecessary for the reflective liquid crystal element 43 is recovered and converted and then reused, so that the projection system 4A of the present embodiment is used. The optical lens 44 can receive more imaging beams, thereby increasing the optical flow of the projection system 4 A. Please refer to FIG. 9 ' for a specific structure and optical path diagram of the projection system shown by the circle 7 in the second embodiment. The projection system 4B of the present embodiment is substantially similar to that described in the projection system 4A of the foregoing first embodiment, and will not be described again. The present embodiment differs from the foregoing first embodiment in that the third reflective element 42丨34, the second focusing mirror group 42丨33, and the second reflective element 42132 in the first embodiment are separated from each other. Replaced by the trapezoidal mirror 42丨36 of the present embodiment, that is, the present embodiment is green

The optical path planning component group 42丨3 in the projection system 413 includes a first reflective component 42131, a third focusing mirror group 42135, and a ladder mirror 42丨36. The optical polarity switching structure 4212 is disposed on the ladder mirror 42丨. 36 is between the second 稜鏡 42 丨丨 5; of course, it is also disposed between the trapezoidal mirror 42136 and the first reflective element 42 ΐ 3 ι (not shown).

The above is the best example of the creation of the creation, and is intended to limit the scope of the creation of the 'Lee Wai Wai' and therefore any other equivalent changes or modifications that have been made without the spirit of this creation should be It is included in the patent scope of this case. 34 M439819 [Simple description of the diagram] Figure 1 is a schematic diagram of the structure and optical path of a conventional reflective liquid crystal projection system. FIG. 2 is a schematic diagram showing the structure and optical path of another conventional reflective liquid crystal projection system. FIG. 3 is a block diagram showing the structure of the first preferred embodiment of the present projection system. Fig. 4 is a schematic view showing the specific structure and optical path of the projection system shown in Fig. 3 in the first embodiment. Fig. 5 is a schematic view showing the specific structure and optical path of the projection system shown in Fig. 3 in the second embodiment. Fig. 6 is a schematic view showing the specific structure and optical path of the projection system shown in Fig. 3 in the third embodiment. Figure 7 is a block diagram showing the structure and optical path of the second preferred embodiment of the present projection system. Fig. 8 is a schematic view showing the specific structure and optical path of the projection system shown in Fig. 7 in the first embodiment. Fig. 9 is a schematic view showing the specific structure and optical path of the projection system shown in Fig. 7 in the second embodiment. 35 M439819 [Description of main components] 1 Projection system 3 Projection system 3B Projection system 4 Projection system 4B Projection system 11 Illumination device 1 3 Polarization separation 稜鏡1 5 Reflective liquid crystal element 21 Illumination device 23 Reflective polarizer 25 Reflective liquid crystal Element 28 Light detector 32 Light beam processing module 34 Optical lens 41 Illumination device 43 Reflective liquid crystal element 4 5 Illumination optical axis 321 Beam recovery module 323 First focusing mirror group 325 Light detecting sheet 422 Collimating lens module 424 Polarized light separation Component 3211 total internal reflection 稜鏡 2 projection system 3A projection system 3C projection system 4A projection system 9 projection surface 12 collimation lens module 1 4 field lens 16 optical lens 22 collimation lens module 24 field lens 26 optical lens 31 illumination device 33 reflective liquid crystal element 3 5 illumination optical axis 42 optical processing module 44 optical lens 131 reflective polarizing film 322 collimating lens module 324 polarized light separating element 421 optical recovery module 423 first focusing mirror group 425 light detecting sheet 3212 optical polarity conversion structure 36

Claims (1)

M439S19 VI. Patent application scope: A reflective liquid crystal projection system, comprising: - a device for providing a plurality of illumination beams; a reflective liquid crystal (LCOS) component for presenting an electronic image frame; a component (PBS), wherein a first portion of the illumination beams is incident on the reflective liquid crystal element, and the first partial illumination beam is reflected on the reflective liquid crystal element, and the electronic image is generated The screen is converted into another plurality of imaging pupils; the optical pickup is configured to receive and project the imaging beams to a projection surface; and a beam recovery module is provided for one of the illumination apertures The second part of the illumination beam is incident on the polarization separation element, and is converted into a polarity, and then outputted, so that the second part of the illumination beam after the polarity is converted is again incident on the polarization separation element; wherein the aperture recovery module includes at least a total internal reflection (TIR) 稜鏡 for the illumination pupils from the illumination device to penetrate therein and for the polarization component Totally reflected on the second portion of the illumination beam element thereof. 2. The reflective liquid crystal projection system of claim 2, wherein the polarized light separating element is configured to pass any one of the illumination beams into the light and to provide the illumination pupils. Any one of the S-polar illuminators generates a reflection thereon, and the total internal reflection 稜鏡 is disposed between the illuminating device and the polarization separating element. 3. The reflective liquid crystal projection system of claim 2, wherein the all 38 M439819 internal reflection prism comprises a first 耪 θ ^ 夂 and a second 稜鏡, and the first 稜鏡 has a a first light incident surface and a fourth surface, and a second light incident surface and a second opposite surface, and the first opposite surface and the second opposite surface Relatively disposed: wherein 'the projection system is formed with - illumination (four), and the lost angle between the first opposite surface of the first prism and the illumination optical axis and the second opposite surface of the second prism and the illumination The angle of loss between the optical axes is 45 degrees, or when the illuminating device is disposed away from the illumination optical axis, one side of the first 与 and the (four) double prism, the 白 face white king - right triangle When the illumination device is not deviated from the illumination optical axis, the combination of the side of the first prism and the side of the second pupil is a parallelogram. 4. The reflective liquid crystal projection system of claim 3, further comprising: a light-like sheet disposed between the polarized light separating element and the optical lens to block the image forming light beam Any of the Ρ-polar beam beams are incident on the optical lens, or the -8-polar beam of the image beam is blocked from being incident on the optical lens. 5. The reflective liquid crystal projection system of claim 3, wherein the beam recovery group I further comprises a light polarity conversion structure for converting a polarity of the second portion of the illumination beams. And the first partial illumination beam outputted from the polarization component is incident on the total internal reflection prism after passing through the optical polarity conversion structure. 6. The reflective liquid crystal projection system of claim 5, wherein the optical polarity conversion structure is a 丨/2 wavelength plate. 39. The reflective beam projection system according to claim 5, wherein the beam back (four) group further comprises an optical path gauge I component group for changing the illumination beam. The direction of the passing. .8, as shown in paragraph 7, the reflection "crystal projection system, including: collimation I group" is set between the illumination device and the total internal reflection prism, used to receive The angle of incidence of each of the illumination beams is rotated; and _ 帛 焦 焦 焦 焦 设 设 设 设 焦 焦 焦 焦 焦 焦 焦 稜鏡 稜鏡 稜鏡 稜鏡 稜鏡 稜鏡 稜鏡 稜鏡 稜鏡 用以 用以 用以 用以 用以 用以 用以 用以 用以 用以 用以 用以 用以 用以The angle of incidence is output and output. 9. The reflective liquid crystal projection system of claim 4, wherein the optical path planning component group comprises at least: - a trapezoidal mirror for providing the second portion of the illumination pupil from the polarized light separating element at least through The second prism that is incident on the total internal reflection ;; /, the light polarity switching structure is disposed between the polarization separation element and the trapezoid _ ,, or is disposed in the ladder mirror and the first Between the two turns; or the light path planning component group includes at least: a reflective element and a second reflective element for respectively reflecting each of the illumination beams incident thereon; and a second focusing mirror a group for adjusting an incident angle of each illumination pupil received and outputting; wherein 'the second reflective element is disposed between the second focusing lens group and the total internal reflection lens 126' and Light intensity and light uniformity on reflective liquid crystal elements