CN101750857B - LCD (liquid crystal display) projection display system - Google Patents
LCD (liquid crystal display) projection display system Download PDFInfo
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- CN101750857B CN101750857B CN2009102516076A CN200910251607A CN101750857B CN 101750857 B CN101750857 B CN 101750857B CN 2009102516076 A CN2009102516076 A CN 2009102516076A CN 200910251607 A CN200910251607 A CN 200910251607A CN 101750857 B CN101750857 B CN 101750857B
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Abstract
The invention discloses an LCD (liquid crystal display) projection display method which comprises a screen, an optical engine, a projection lens and an image sensor. The optical engine comprises a color separation guide lens assembly, three liquid crystal display panels and an optical prism assembly, the color separation guide lens assembly separates a white light emitted by a light source into a three-primary colored light comprising a red light, a green light and a blue light, and guides each primary light into a corresponding liquid crystal display panel, each liquid crystal display panel modulates and generates a primary colored optical image based on the pixel information of an data image and an incident primary colored light, and the optical prism assembly combines three types of primary colored images into a panchromatic optical image. The projection lens projects the panchromatic optical image generated by the optical engine to the screen, and allows an infrared light from the screen to permeate. The image sensor senses the infrared light from the projection lens to form a sensed image. Accordingly, the image sensor can detect out the touch in any areas on the screen.
Description
[technical field]
The present invention relates to field of projection display, especially relate to the LCD projection display equipment (liquid-crystal-display projection display system is called for short the LCD projection display equipment) that can carry out one or more contacts measuring ability.
[background technology]
Projection display system can receive the picture signal from external video equipment, and enlarged image is projected on the display screen, and it is suitable for being used for introducing some information to mass viewer audiences.In general, projection display system comprises light source, light engine (Light engine), controller and display screen.When external image signal input projection display system, said controller will obtain the Pixel Information (such as color and gray scale) of said image, and the operation of controlling the image component in the said light engine is to reproduce or the said image of reconstruct.Image component in the said light engine is through combination or modulate the three primary colors image to reconstruct full-colour image, afterwards said full-colour image is projected on the said display screen.
At present commonly used mainly contain three kinds of projection display systems, first kind can be called as liquid crystal projection display systems (liquid-crystal-display projection display system is called for short the LCD projection display equipment).Said LCD projection display equipment includes many pixels, and each pixel is filling liquid crystal and forming between two transparent panels all.Said liquid crystal can be used as light valve or optical gate, and the light quantity that sees through each pixel is to be determined by the polarizing voltage on the liquid crystal that puts on this pixel (Polarization Voltage).Through modulating this polarizing voltage, image parameter such as brightness that can the control chart picture or gray scale.For coloured image, be directed seeing through three LCD panels respectively from the isolated primaries of white light source.Based on the Pixel Information that said controller gets access to, each LCD panel shows a kind of in the three primary colors (red, green and blue) of said image.Subsequently, these three primary colors images in said light engine by reconstruct or be combined as full-colour image.Afterwards, said reconstructed image is calibrated and amplified through projection lens (Projection lens), and directly or indirectly project on the display screen.
Second kind can be called as digital light and handle projection display system (digital light processing projection display system is called for short the DLP projection display system).The core devices of said DLP projection display system is the DMD of being made up of micro mirror array (Digital Micromirror Device is called for short DMD), and each micro mirror in the said micro mirror array all can be represented or a pixel of correspondence image.Different with the transmission projection technology in the LCD projection display equipment, what the DLP projection display system adopted is the reflective projection technology.Thereby the eyeglass angle through adjusting each micro mirror can import light into or derive said projection lens, and then control arrives the light quantity of each pixel of said projection lens.Can obtain color of image through light source being passed rotation colour wheel (Color wheel); Specifically, said colour wheel has red, green and primary colors, when light passes through the red part of colour wheel; The image that projects is the gray level image of a width of cloth whole red, and blueness and yellow are in like manner.When the fast rotational of colour wheel, then can obtain a secondary three primary colors image, after the three primary colors image was by projection, because human eye has the characteristic of persistence of vision, we just can observe the full-color image by the stack of reddish yellow primary colors.
The third can be by liquid crystal on silicon projection display system (Liquid Crystal On Silicon projection system is called for short the LCOS projection display system).Different with the reflective projection of the transmission projection of LCD projection display equipment and DLP optical projection system, in the LCOS projection display system, liquid crystal layer is arranged between transparent film transistor (thin-film transistor is called for short TFT) layer and the silicon semiconductor layer.Said silicon semiconductor layer has reflecting surface; When light shines on the LCOS device; Said liquid crystal will be worked and will be light valve or optical gate, thereby control arrives the light quantity of the silicon semiconductor reflecting surface under it, and said silicon semiconductor reflecting surface then reflects the light that shines on it.Say that in a sense the LCOS projection-type is similar to the combination of LCD projection and DLP projection.
Similar in color principle in the LCOS projection display system and the LCD projection display equipment.White light source is seen through a series of wavelength selects dichronic mirror or light filter can be separated into primaries.These primaries are through one group of polarization spectroscope (polarized beam splitter; Be called for short PBS) be diverted on the LCOS device of being responsible for this primary colors; Be imported on the blue LCOS device such as blue light, red light is imported on the red LCOS device, and green light is imported on the green LCOS device.The polarizing voltage that said LCOS device is modulated the liquid crystal of each pixel according to the gray-scale value that defines in each pixel in the image, and reflection original color image.Afterwards, this three primary colors image is by reconstruct or be combined as full-colour image, and is last, said reconstruct full-colour image is calibrated and amplified through projection lens, and directly or indirectly project on the display screen.
The application of these optical projection systems receives much attention recently, especially in desktop computer (table computer) or surface computer (surface computer) field.Said surface computer uses special user interface to replace keyboard and mouse, its allow user directly to show with operation with touch screen interaction and touch-screen on target.When the target on user and the display screen was mutual, the part of a key was exactly the performance that multiconductor detects.
Fig. 7 shows a framework of the multiconductor detection system of surface computer 700.In this framework, the projection lens 720 of projection display system projects video images onto on the display surface 710.Said projection lens 720 is positioned at towards the center of the backboard of said display surface 710.Near-infrared LED light source 740 emission wavelengths are the back side of the light of 850 nanometers to said display surface 710.When an object touches said display surface 710, the touch occurrence positions of said display surface 710 will reflect said near infrared light.Four infrared cameras 730 detect from the said near infrared lights of display surface 710 reflections, and each covers about 1/4 zone of said display surface 710.Processor (not shown) will lump together from the image sets of each camera 730, and calculates the position that touches input.
Desktop computer directly projects image onto display surface such as Microsoft surface (Microsoft Surface), and it is positioned over the position corresponding with the center of display surface with said projection lens usually and is distorted to prevent projected image.The center of departing from said projection lens that any camera of installing senses touch to import all has to be set up.If only with an off-centered camera whole viewing area is touched detection, the infrared image of its collection will twist so.Through analyzing such warp image and calculating accurate touch location will be more complicated and difficulty.Therefore, the Microsoft's such projection display system in surface shown in the image pattern 7 has adopted a plurality of cameras, and each camera only covers the part of viewing area.Subsequently, will can cover the image of whole display surface from the synthetic pair of the unwrung image sets of each camera.For image is projected to the optical projection system on the said display surface indirectly, optical device such as the mirror and the camera lens that are used to change said projected image direction, can hinder equally and use a camera that is positioned at the center to be used to carry out multiple point touching input detection.
For accurate many touch inputs, a plurality of infrared cameras of present Technology Need and the resources that will make up of detecting in projection display system from the image of each independent camera.These need all will improve the cost of projection display system, and increase the complexity of projection display system.
Therefore, demand proposing a kind of multiconductor detection scheme that can be applicable in the projection display system urgently.
[summary of the invention]
The purpose of this part is to summarize some aspects of embodiments of the invention and briefly introduces some preferred embodiments.In this part and the application's specification digest and denomination of invention, may do a little simplification or omit avoiding the making purpose of this part, specification digest and denomination of invention fuzzy, and this simplification or omit and can not be used to limit scope of the present invention.
One of technical matters that the present invention will solve is to provide a kind of LCD projection display equipment, and based on said LCD projection display equipment multiconductor being detected becomes and maybe or be achieved.
In order to address the above problem, according to an aspect of the present invention, the invention provides a kind of LCD projection display equipment, it comprises screen, light engine, projection lens and imageing sensor.Said light engine comprises color separation guide mirror assembly, three display panels and optical prism assembly; The white light that said color separation guide mirror assembly sends light source is separated into the primaries that comprises ruddiness, green glow and blue light; And each primitive color light is directed to corresponding display panels; Each display panels produces a kind of primary colors optical imagery based on the Pixel Information of data image and the primitive color light modulation of incident, and said optical prism assembly is combined as panchromatic optical imagery with three kinds of primary colour images.On panchromatic optical image projection to the said screen of said projection lens with said light engine generation, and allow to see through from the infrared light of said screen.Said image sensor senses from the infrared light of said projection lens to form sensed image.
Further, when on screen, having a plurality of touch point, each touch point all can form an infrared light, and said infrared light is transmitted to said imageing sensor through said projection lens.
Further, it also includes image processing module, and said image processing module receives the sensed image from imageing sensor, and determines the coordinate of infrared light based on said sensed image.
Further, said projection lens filtering or subdue visible light and ultraviolet light from screen.
Further, in a side of the projection lens of screen infrared transmitter is set, said infrared transmitter emission infrared light or near infrared light are to the back side of said screen, and when said screen is touched, but each touches all reflected infrared to said projection lens sides.
Further; Said screen includes an acryl layer at least; At the edge of acryl layer installing infrared transmitter; The infrared light of said infrared transmitter emission does not stop reflection in acryl layer, when said screen was touched, IR can be reflexed to said projection lens side from the touch place.
Further; It also comprises the catoptron between said optical prism assembly and projection lens; Said catoptron allows to see through self from the panchromatic optical imagery of optical prism assembly, and reflects the infrared light that sees through projection lens from screen to imageing sensor.
Further, said optical prism assembly directly will cause imageing sensor from the infrared ray optical direction of projection camera lens.
Further; Said optical prism assembly comprises three relatively independent optical prisms; Utilize these three optical prisms will be, utilize one or more in these three optical prisms to cause imageing sensor simultaneously from the infrared ray optical direction of projection camera lens from the panchromatic optical imagery that is combined as of the three primary colors image of display panels.
Further, said imageing sensor is charge-coupled device (CCD) or cmos sensor.
Compared with prior art; Imageing sensor among the present invention will be multiplexed with its collection lens as the projection lens of image projection and gathers the image on screen or the screen orientation; Like this; The infrared signal that results from any viewing area of screen can both turn back to said projection lens, arrives imageing sensor at last, that is to say that said imageing sensor just can detect the touch in any zone on the screen.
About other purposes of the present invention, characteristic and advantage will combine accompanying drawing in embodiment, to describe in detail below.
[description of drawings]
In conjunction with reference to accompanying drawing and ensuing detailed description, the present invention will be more readily understood, the structure member that wherein same Reference numeral is corresponding same, wherein:
Fig. 1 shows an embodiment of LCD projection display equipment;
Fig. 2 shows an embodiment with the LCD projection display equipment that touches measuring ability;
Fig. 3 shows another embodiment with the LCD projection display equipment that touches measuring ability;
Fig. 4 shows an embodiment of the image processing module in Fig. 2 or 3;
Fig. 5 shows and can unite an embodiment of the infrared pen of use with the imageing sensor device;
Fig. 6 shows an embodiment of the desktop computer that uses the projection display system among Fig. 2 or 3; With
Fig. 7 shows a framework of projection display system in the existing desktop computer.
[embodiment]
Detailed description of the present invention is mainly come the running of direct or indirect simulation technical scheme of the present invention through program, step, logical block, process or other symbolistic descriptions.Be the thorough the present invention that understands, in ensuing description, stated a lot of specific detail.And when not having these specific detail, the present invention then possibly still can realize.Affiliated those of skill in the art use these descriptions here and state that the others skilled in the art in affiliated field effectively introduce their work essence.In other words, be the object of the invention of avoiding confusion, owing to method, program, composition and the circuit known are readily appreciated that, so they are not described in detail.
Alleged here " embodiment " or " embodiment " are meant special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different in this manual local " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or optionally mutually exclusive with other embodiment embodiment.In addition, represent that the sequence of modules and revocable in method, process flow diagram or the functional block diagram of one or more embodiment refers to any particular order, also be not construed as limiting the invention.
An embodiment who shows LCD (liquid-crystal-display is called for short LCD) projection display system 100 of Fig. 1 signal.Said projection display system 100 includes light source 120, light engine 140, projection lens 160 and screen (or being referred to as display screen) 180.
Said light source 120 can be with generating white light 101, and said white light 101 is imported in the said light engine 140.Said light engine 140 comprises color separation guide mirror assembly, three display panels 146,147,148 and optical prism assembly (optical prism assembly) 149.In the said display panels 146,147 and 148 each is responsible for being projected to a kind of color in the three primary colors of the image on the screen 180.Said white light 101 gets into the color separation guide mirror assembly.Said color separation guide mirror assembly is separated into the primaries that comprises ruddiness, green glow and blue light with said white light 101, and each primitive color light is directed to corresponding display panels.(be the image of data sense this moment based on input picture; The abbreviation data image) the Pixel Information and the primitive color light of incident; Video Controller (not shown) is modulated said display panels 146,147 and 148 respectively and is generated three primary colors image (abbreviate optical imagery for the image of optical significance this moment).Said optical prism assembly 149 is combined into full-colour image 108 with said three primary colors image sets, and said full-colour image 108 is projected to said projection lens 160.Said projection lens 160 is with said full-colour image 108 direct or indirect being projected on the screen 180.
In the embodiment show in figure 1, display panels 146 is responsible for being projected to the green of the image on the screen 180, and display panels 147 is responsible for the blueness of said image, and display panels 148 is responsible for the redness of said image.Said color separation guide mirror assembly comprises 141,142 and 143, two catoptrons 144 and 145 of three different dichronic mirrors.Said dichronic mirror 141 is used for optionally seeing through green glow 102, and reflection includes residue (purple) light 103 of ruddiness and blue light.Subsequently, the green glow 102 that passes dichronic mirror 141 reflexes to said display panels 146 via catoptron 144.Simultaneously, the said purple light 103 of said dichronic mirror 142 interceptions optionally see through ruddiness 104 and other high wavelength light (such as infrared light), and reflect blue 105 is to said display panels 147.In addition, said dichronic mirror 143 separates ruddiness 106, and said ruddiness 106 is reflexed to said catoptron 145, and said catoptron 145 reflexes to said display panels 148 with said ruddiness 106 again.Based on the image pixel information of input, the said display panels 146 of Video Controller (not shown) modulation generates green image, modulates said display panels 147 and generates blue image, modulates said display panels 148 and generates red image.Said optical prism assembly 149 is combined into full-colour image 108 with said three primary colors image sets, and said full-colour image 108 is projected to said projection lens 160.
In other embodiments; Can arbitrarily adjust the spectroscopic behaviour of three different dichronic mirrors 141,142 and 143, as long as can produce primaries, such as making dichronic mirror 141 see through blue light through them; And make dichronic mirror 142 reflection red lights; Dichronic mirror 143 reflect blue light, along with the change of the spectroscopic behaviour of dichronic mirror, the primary colors of the said image that said display panels 146,147 and 148 is responsible for also can change thereupon.
Fig. 2 shows an embodiment with the LCD projection display equipment 200 that touches measuring ability.Said LCD projection display equipment 200 shown in Fig. 2 is similar with the structure major part of the LCD projection display equipment 100 shown in Fig. 1; Both differences are: the former is except the unit that the latter comprises; Also include image inductor 210, image processor 230 and catoptron 250, wherein the working method of the former unit identical of comprising and principle identical or similar with the latter all with the latter.
Said catoptron 250 is between projection lens 260 and optical prism assembly 249; It can reflect infrared light to the said imageing sensor 210 from projection camera lens 260, and the projected image (projection ray in other words) from optical prism assembly 249 is had no influence.Said imageing sensor 210 can be charge-coupled device (CCD) CCD or cmos sensor, and it can be responded to from the IR of catoptron 250 forming image, and can export said image to image processing module 230.Said imageing sensor 210, catoptron 250, projection lens 260 and image processing module 230 common cooperations can be accomplished on the screen measuring ability of the one or more contacts on 280.
Fig. 2 shows the example that a concrete touch detects; When an object 202 (such as finger, felt pen or other object) touch screen 280; Can generate infrared light 204 at these object 202 places; Said infrared light 204 will penetrate said projection lens 260 to said reflective mirror 250 along projection path, and said reflective mirror 250 can reflex to said imageing sensor 210 with said infrared light 204, and is same; During said object 203 touch screen 280; Can generate infrared light 205 at these object 203 places, said infrared light 205 will penetrate said projection lens 260 to said reflective mirror 250 along projection path, and said reflective mirror 250 can reflex to said imageing sensor 210 with said infrared light 205.Each pixel in the said imageing sensor 210 is corresponding with each position on the screen 280, and therefore light-sensitive image vegetarian refreshments through analyzing said imageing sensor 210 output images or zone just can obtain the coordinate or the position of the screen 280 that said object 202 and 203 touched.Sum up; When a plurality of touches take place; Each touches and all can form an infrared signal; And these infrared signals all can get into projection lens through projecting light path, and finally by image sensor senses to, said image processing module 230 then can calculate the coordinate or the position of each touch.The effect of said image processing module 230 is exactly that the image of said imageing sensor 210 outputs is analyzed and handled to obtain the coordinate of touch point, and the concrete course of work and the implementation of said image processing module 230 will be explained in greater detail below.
In one embodiment, said catoptron 250 is an ir reflector, and it reflects the infrared light from projection camera lens 260, and does not reflect visible light and the ultraviolet light from projection camera lens 260.Therefore; Infrared light can arrive imageing sensor 210 easily; And can generate image in view of the above with infrared induction point; Visible light and ultraviolet light be then because the restriction of infrared light reflector and can not arrive said imageing sensor 210, thereby also get rid of or reduced the interference that the induction by the infrared light of visible light or ultraviolet light image sensor 210 brings.In another embodiment; Said projection lens 260 can filtering get into visible light and ultraviolet light in it from screen orientation; And only allow infrared light to get in it from screen orientation, so equally also can get rid of or reduce the interference of bringing for the induction of the infrared light of imageing sensor 210 by visible light or ultraviolet light.
Characteristic, advantage or a characteristic of one embodiment of the present of invention are: said imageing sensor 210 will be multiplexed with its collection lens as the projection lens 260 of image projection and gathers the image on screen 280 or the screen orientation.Like this, on the one hand, because projection lens 260 can be positioned at the center of said screen 280, so the image on screen 280 directions of its collection generally can not be distorted, and subsequent processes is more convenient and easy; On the other hand; Because projection lens 260 itself is used for projection; And view field's (being the viewing area of screen 280) just imageing sensor 210 hope region covered, so this projection lens 260 can cover whole view field or viewing area fully, and then can satisfy the needs that the contact is detected fully; In other words; The infrared signal that results from any viewing area of screen 280 can both turn back to said projection lens 260 according to projection path, arrives imageing sensor 210 at last, and said like this imageing sensor 210 just can detect the touch in any zone on the screen 280; Again on the one hand, because light generally has very strong anti-interference, 260 pairs of multiplexing projection lens image and the image through its collection through its projection can not have any impact; On the one hand, do not need that external camera is installed specially again and be used for infrared detection in addition, promptly save the space, save cost yet.
Fig. 3 shows another embodiment with the LCD projection display equipment 300 that touches measuring ability.Said LCD projection display equipment 300 shown in Fig. 3 is similar with the structure major part of the LCD projection display equipment 200 shown in Fig. 2; Both differences are: the former optical prism assembly 349 is different with the latter's optical prism assembly 249 structures; The former does not have the catoptron that the latter has, wherein the working method of the former unit identical with the latter of comprising and principle identical with the latter all.As shown in Figure 3; Said optical prism assembly 349 includes three relatively independent optical prism 349A, 349B and 349C; Said optical prism assembly 349 can be with the full-colour image that is combined as from the three primary colors image of display panels through these three optical prisms, and is projected on the screen 380 through projection lens 360.Simultaneously; Present embodiment need be by catoptron 250; And can directly will be directed to imageing sensor 310 from the infrared light reflection of projection camera lens 360 by two independent optical prisms in the said optical prism assembly 349, said imageing sensor 310 transfers to image processing module 330 with the image of induction.Fig. 3 shows the example that a concrete touch detects; When an object 302 (such as finger, felt pen or other object) touch screen 380; Can generate infrared light 304 at these object 302 places; Said infrared light 304 will penetrate said projection lens 360 to said optical prism 349B along projection path, and said optical prism 349B can reflex to said optical prism 349C with said infrared light 304, and said optical prism 349C then can reflex to said imageing sensor 310 with said infrared light 304.
The mode of the screen generation infrared light of object touch projection display system has a variety of, introduces several kinds of practical modes below.
In one embodiment; Just as that kind shown in Fig. 7; Can infrared transmitter be set (such as IR LED in a side of the projection lens of screen; Infrarede emitting diode), said infrared transmitter emission infrared light or near infrared light arrive the back side of said screen (such as 280 among Fig. 2), and cover whole screen.In a preferred embodiment, can use a plurality of IR LED to guarantee to cover fully the viewing area of said screen.Usually the infrared light of launching is can be to back reflective (not promptly not can this side of reflected back projection lens), and when having object to touch said screen, said infrared light will reflect in the touch point.In addition, if when having a plurality of zones to be touched simultaneously, each touch area all can reflected infrared, such as the infrared light among Fig. 2 204 and 205.In this embodiment, the object of touch screen can be that finger, felt pen or other materials such as silica gel etc. have certain toughness and reflexive material.
In another embodiment; Can use FTIR (Frustrated Total Internal Reflection, frustrated total internal reflection) technology to realize the generation of infrared light, said screen includes an acrylic board (Acrylic) layer at least; Install infrared transmitter (such as IR LED at the edge of acryl layer; Can be a plurality of), the infrared light of said infrared transmitter emission can not stop reflection in acryl layer, and can not run out; This is referred to as total internal reflection (Total Internal Reflection); But when your finger (perhaps other materials such as silica gel etc. have certain toughness and reflexive material) was run into the acrylic surface, total internal reflection was destroyed, and IR is pointed reflection and come out.Same, when having a plurality of zones to be touched, each touch area all can produce infrared ray.
In another embodiment, can be with human body as the infrared light emissive source with body temperature, when the finger touch screen, its body temperature will make outwards emission infrared light of this finger, and these infrared rays then can be used as the infrared light that touch screen produces.In another embodiment; The infrared light that can use infrared pen (IR stylus) to send when producing touch screen; Even need really not touch screen this moment; Only need to use infrared pen emission infrared light to screen, to get final product, thereby these infrared lights can penetrate the visual field that screen gets into projection lens.Hereinafter enumerated a kind of concrete realization example of said infrared pen, particular content will be described in more detail below.
Fig. 4 is for showing the functional-block diagram that is used for going up at projection screen (screen in other words) embodiment of the image processing module 400 of confirming one or more contact positions, and it can be as image processing module 230 among Fig. 2 or the image processing module 330 among Fig. 3.Said infrared image sensor 210 or 310 detected picture signals can be transfused to said image processing module 400.As shown in Figure 4, said image processing module 400 comprises AD conversion unit 420, storage unit 422, micro-control unit 424, Flame Image Process and enhancement unit 426 and contact coordinate computing unit 428.When concrete the realization, the program code that is stored in the said storage unit 422 makes said micro-control unit 424 synchronous all other unit catch the one or more contacts on the image with calculating.When operation, said AD conversion unit 420 is a digital picture with the image transitions that receives, and said digital picture can be cached in the said storage unit 422.The view data that said micro-control unit 424 extracts from said storage unit 422, and instigate said Flame Image Process and enhancement unit 426 to be handled according to pre-defined algorithm and strengthen said view data.Said contact coordinate computing unit 428 receives the image after enhancing and the processing, and calculates the coordinate of infrared input or touch.Said result 430 inputs to external device (ED) carrying out subsequent operation, such as the motion of confirming the contact etc.
Fig. 5 shows an example of uniting the infrared pen 500 of use with infrared image sensor.Said infrared pen 500 has handwriting 510.One end of said handwriting 510 has transparent window 520, and the other end has knock-downly uncaps 580.Offer battery space 550 in the said infrared pen; Take said uncapping apart and can the batteries in the battery space 550 taken out or operate the batteries in the battery space 550 after 580, said battery electrically connects with at least one infrared LED 530 through power control circuit 540 and switch 560 on the handwriting 510.Said infrarede emitting diode (IR LED) 530 is positioned at the back of said transparent window 520, and when said infrared LED 530 was launched infrared rays, said infrared ray can outwards be launched through said transparent window 520.Said switch 560 can be controlled the opening and closing of said infrared LED 530.
Fig. 6 shows an embodiment of the desktop computer (table computer) 600 with multiconductor measuring ability.Said desktop computer 600 comprises that inside has the table body 610 of cavity, is used as the display screen 620 of table body 610 upper surfaces and is placed in the optical projection system 630 in a body 610 cavitys.Said optical projection system 630 can be the every other part except screen of projection display system among Fig. 2 or Fig. 3.Said like this desktop computer is not provided with infrared camera, can have the multiconductor measuring ability yet.In an other embodiment, said desktop computer 600 also includes the infrared LED 640 that is arranged at the emission infrared light in the cavity.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement etc., all should be included within protection scope of the present invention.
Claims (9)
1. LCD projection display equipment is characterized in that it comprises:
Screen;
Light engine; It comprises color separation guide mirror assembly, three display panels and optical prism assembly; The white light that said color separation guide mirror assembly sends light source is separated into the primaries that comprises ruddiness, green glow and blue light; And each primitive color light is directed to corresponding display panels, and each display panels produces a kind of primary colors optical imagery based on the Pixel Information of data image and the primitive color light modulation of incident, and said optical prism assembly is combined as panchromatic optical imagery with three kinds of primary colour images;
Projection lens on panchromatic optical image projection to the said screen with said light engine generation, and allows to see through from the infrared light of said screen;
Imageing sensor, induction from the infrared light of said projection lens to form sensed image; With
Image processing module, it receives the sensed image from imageing sensor, and determines the coordinate of infrared light based on said sensed image.
2. LCD projection display equipment as claimed in claim 1 is characterized in that: when on screen, having a plurality of touch point, each touch point all can form an infrared light, and said infrared light is transmitted to said imageing sensor through said projection lens.
3. LCD projection display equipment as claimed in claim 1 is characterized in that: said projection lens filtering or subdue visible light and the ultraviolet light from screen.
4. LCD projection display equipment as claimed in claim 1; It is characterized in that: the side at the projection lens of screen is provided with infrared transmitter; Said infrared transmitter emission infrared light or near infrared light are to the back side of said screen; When said screen is touched, but each touches all reflected infrared to said projection lens sides.
5. LCD projection display equipment as claimed in claim 1; It is characterized in that: said screen includes an acryl layer at least; At the edge of acryl layer installing infrared transmitter; The infrared light of said infrared transmitter emission does not stop reflection in acryl layer, when said screen was touched, IR can be reflexed to said projection lens side from the touch place.
6. like each described LCD projection display equipment among the claim 1-5; It is characterized in that: it also comprises the catoptron between said optical prism assembly and projection lens; Said catoptron allows to see through self from the panchromatic optical imagery of optical prism assembly, and reflects the infrared light that sees through projection lens from screen to imageing sensor.
7. like each described LCD projection display equipment among the claim 1-5, it is characterized in that: said optical prism assembly directly will cause imageing sensor from the infrared ray optical direction of projection camera lens.
8. LCD projection display equipment as claimed in claim 7; It is characterized in that: said optical prism assembly comprises three relatively independent optical prisms; Utilize these three optical prisms will be, utilize one or more in these three optical prisms to cause imageing sensor simultaneously from the infrared ray optical direction of projection camera lens from the panchromatic optical imagery that is combined as of the three primary colors image of display panels.
9. like each described LCD projection display equipment among the claim 1-5, it is characterized in that: said imageing sensor is charge-coupled device (CCD) or cmos sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102516076A CN101750857B (en) | 2009-12-28 | 2009-12-28 | LCD (liquid crystal display) projection display system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102516076A CN101750857B (en) | 2009-12-28 | 2009-12-28 | LCD (liquid crystal display) projection display system |
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| CN101750857A CN101750857A (en) | 2010-06-23 |
| CN101750857B true CN101750857B (en) | 2012-07-25 |
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| CN2009102516076A Expired - Fee Related CN101750857B (en) | 2009-12-28 | 2009-12-28 | LCD (liquid crystal display) projection display system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104054399B (en) * | 2012-01-20 | 2016-04-27 | 皇家飞利浦有限公司 | Photodetector |
| CN103376555A (en) * | 2012-04-19 | 2013-10-30 | 致茂电子(苏州)有限公司 | Optical image capture device |
| CN103019477A (en) * | 2012-12-14 | 2013-04-03 | 山东龙视天下传媒集团有限公司 | Indoor wireless audio-video holographic interaction back projection all-in-one machine and realization method |
| WO2014101018A1 (en) * | 2012-12-26 | 2014-07-03 | 神画科技（深圳）有限公司 | Projection system with infrared light source |
| CN109933250B (en) * | 2019-03-26 | 2024-02-09 | 京东方科技集团股份有限公司 | Display module, display device and display equipment |
| CN110703485B (en) * | 2019-09-18 | 2021-11-16 | 昆山龙腾光电股份有限公司 | Liquid crystal display panel and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464745A (en) * | 2007-12-17 | 2009-06-24 | 北京汇冠新技术有限公司 | Back projection light source type touch recognition device and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464745A (en) * | 2007-12-17 | 2009-06-24 | 北京汇冠新技术有限公司 | Back projection light source type touch recognition device and method thereof |
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