CN101750857A - LCD (liquid crystal display) projection display system - Google Patents
LCD (liquid crystal display) projection display system Download PDFInfo
- Publication number
- CN101750857A CN101750857A CN200910251607A CN200910251607A CN101750857A CN 101750857 A CN101750857 A CN 101750857A CN 200910251607 A CN200910251607 A CN 200910251607A CN 200910251607 A CN200910251607 A CN 200910251607A CN 101750857 A CN101750857 A CN 101750857A
- Authority
- CN
- China
- Prior art keywords
- light
- screen
- image
- infrared
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses an LCD (liquid crystal display) projection display system 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 system (liquid-crystal-display projection display system is called for short the LCD projection display system) 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, described controller will obtain the Pixel Information (such as color and gray scale) of described image, and the operation of controlling the image component in the described light engine is to reproduce or the described image of reconstruct.Image component in the described light engine is by combination or modulate the three primary colors image to reconstruct full-colour image, afterwards described full-colour image is projected on the described 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 system).Described LCD projection display system includes many pixels, and each pixel is filling liquid crystal and forming between two transparent panels all.Described 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).By 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 described controller gets access to, each LCD panel shows a kind of in the three primary colors (red, green and blue) of described image.Subsequently, these three primary colors images in described light engine by reconstruct or be combined as full-colour image.Afterwards, described reconstructed image is calibrated and amplified by 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 processingprojection display system is called for short the DLP projection display system).The core devices of described DLP projection display system is the Digital Micromirror Device of being made up of micro mirror array (Digital MicromirrorDevice is called for short DMD), and each micro mirror in the described micro mirror array all can be represented or a pixel of correspondence image.Different with the transmission projection technology in the LCD projection display system, what the DLP projection display system adopted is the reflective projection technology.Thereby can import light into or derive described projection lens by the eyeglass angle of adjusting each micro mirror, and then control arrives the light quantity of each pixel of described projection lens.Can obtain color of image by light source being passed rotation colour wheel (Color wheel), specifically, described colour wheel has the red, green and blue three 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 projected, 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 Siliconprojection system is called for short the LCOS projection display system).Different with the reflective projection of the transmission projection of LCD projection display system 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.Described silicon semiconductor layer has reflecting surface, when light shines on the LCOS device, described 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 described 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 system.White light source is seen through a series of wavelength selects dichronic mirror or light filter can be separated into primaries.These primaries are by 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 described 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, described reconstruct full-colour image is calibrated and amplified by 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 (tablecomputer) or surface computer (surface computer) field.Described 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.Described projection lens 720 is positioned at towards the center of the backboard of described display surface 710.Near-infrared LED light source 740 emission wavelengths are the back side of the light of 850 nanometers to described display surface 710.When an object touches described display surface 710, the touch occurrence positions of described display surface 710 will reflect described near infrared light.Four infrared cameras 730 detect from the described near infrared lights of display surface 710 reflections, and each covers about 1/4 zone of described 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 described projection lens the position corresponding with the center of display surface usually and is distorted to prevent projected image.The center of departing from described 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.By 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 the optical projection system that image is projected to indirectly on the described display surface, optical device such as the mirror and the camera lens that are used to change described 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 multi-touch input, a plurality of infrared cameras of present Technology Need and the resource 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 the scope of the invention.
One of the technical problem to be solved in the present invention is to provide a kind of LCD projection display system, and based on described LCD projection display system multiconductor being detected becomes and may 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 system, it comprises screen, light engine, projection lens and imageing sensor.Described light engine comprises color separation guide mirror assembly, three display panels and optical prism assembly, the white light that described 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 described optical prism assembly is combined as panchromatic optical imagery with three kinds of primary colour images.The panchromatic optical image projection that described projection lens generates described light engine and allows to see through from the infrared light of described screen to described screen.Described image sensor senses from the infrared light of described projection lens to form sensed image.
Further, when having a plurality of touch point on screen, each touch point all can form an infrared light, and described infrared light is transmitted to described imageing sensor by described projection lens.
Further, it also includes image processing module, and described image processing module receives the sensed image from imageing sensor, and determines the coordinate of infrared light based on described sensed image.
Further, described 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, described infrared transmitter emission infrared light or near infrared light be to the back side of described screen, and when described screen is touched, but each touches all reflected infrared to described projection lens side.
Further, described screen includes an acryl layer at least, at the edge of acryl layer installing infrared transmitter, the infrared light of described infrared transmitter emission does not stop reflection in acryl layer, when described screen was touched, Infrared can be reflexed to described projection lens side from the touch place.
Further, it also comprises the catoptron between described optical prism assembly and projection lens, described catoptron allows to see through self from the panchromatic optical imagery of optical prism assembly, and reflection from the infrared light that sees through projection lens of screen to imageing sensor.
Further, described optical prism assembly directly will cause imageing sensor from the infrared ray optical direction of projection camera lens.
Further, described 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, described 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 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 described projection lens, arrive imageing sensor at last, that is to say that described imageing sensor just can detect the touch in any zone on the screen.
About other purposes of the present invention, feature and advantage are described in detail in embodiment below in conjunction with accompanying drawing.
[description of drawings]
In conjunction with reaching ensuing detailed description with reference to the accompanying drawings, 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 system;
Fig. 2 shows an embodiment with the LCD projection display system that touches measuring ability;
Fig. 3 shows another embodiment with the LCD projection display system 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 solution of the present invention by 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 may still can realize.Affiliated those of skill in the art use these descriptions herein and state that the others skilled in the art in affiliated field effectively introduce their work essence.In other words, be the purpose of the present 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 herein " 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 the sequence of modules in method, process flow diagram or the functional block diagram of one or more embodiment and revocablely refer 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.Described projection display system 100 includes light source 120, light engine 140, projection lens 160 and screen (or being referred to as display screen) 180.
Described light source 120 can be with generating white light 101, and described white light 101 is imported in the described light engine 140.Described 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 described 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.Described white light 101 enters the color separation guide mirror assembly.Described color separation guide mirror assembly is separated into the primaries that comprises ruddiness, green glow and blue light with described 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 described 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).Described optical prism assembly 149 is combined into full-colour image 108 with described three primary colors image sets, and described full-colour image 108 is projected to described projection lens 160.Described projection lens 160 is with described 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 described image, and display panels 148 is responsible for the redness of described image.Described color separation guide mirror assembly comprises 141,142 and 143, two catoptrons 144 and 145 of three different dichronic mirrors.Described 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 described display panels 146 via catoptron 144.Simultaneously, the described purple light 103 of described dichronic mirror 142 interceptions optionally see through ruddiness 104 and other high wavelength light (such as infrared light), and reflect blue 105 is to described display panels 147.In addition, described dichronic mirror 143 separates ruddiness 106, and described ruddiness 106 is reflexed to described catoptron 145, and described catoptron 145 reflexes to described display panels 148 with described ruddiness 106 again.Based on the image pixel information of input, the described display panels 146 of Video Controller (not shown) modulation generates green image, modulates described display panels 147 and generates blue image, modulates described display panels 148 and generates red image.Described optical prism assembly 149 is combined into full-colour image 108 with described three primary colors image sets, and described full-colour image 108 is projected to described 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 by them, such as making dichronic mirror 141 see through blue light, 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 described display panels 146,147 and the 148 described images of being responsible for also can change thereupon.
Fig. 2 shows an embodiment with the LCD projection display system 200 that touches measuring ability.Described LCD projection display system 200 shown in Fig. 2 is similar with the structure major part of the LCD projection display system 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.
Described catoptron 250 is between projection lens 260 and optical prism assembly 249, it can reflect from the infrared light of projection lens 260 to described imageing sensor 210, and to from the projected image (projection ray in other words) of optical prism assembly 249 without any influence.Described imageing sensor 210 can be charge-coupled device (CCD) CCD or cmos sensor, and it can be responded to from the Infrared of catoptron 250 forming image, and can export described image to image processing module 230.Described imageing sensor 210, catoptron 250, projection lens 260 and image processing module 230 common cooperations can be finished 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) during touch screen 280, can generate infrared light 204 at these object 202 places, described infrared light 204 will penetrate described projection lens 260 to described reflective mirror 250 along projection path, described reflective mirror 250 can reflex to described imageing sensor 210 with described infrared light 204, same, during described object 203 touch screen 280, can generate infrared light 205 at these object 203 places, described infrared light 205 will penetrate described projection lens 260 to described reflective mirror 250 along projection path, and described reflective mirror 250 can reflex to described imageing sensor 210 with described infrared light 205.Each pixel in the described imageing sensor 210 is corresponding with each position on the screen 280, therefore light-sensitive image vegetarian refreshments by analyzing described imageing sensor 210 output images or the zone coordinate or the position that just can obtain described object 202 and 203 screens that touched 280.Sum up, when a plurality of touches take place, each touches and all can form an infrared signal, and these infrared signals all can enter projection lens by projecting light path, and finally by image sensor senses to, described image processing module 230 then can calculate the coordinate or the position of each touch.The effect of described image processing module 230 is exactly that the image of described 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 described image processing module 230 will be explained in greater detail below.
In one embodiment, described catoptron 250 is an ir reflector, and its reflection is from the infrared light of projection lens 260, and does not reflect visible light and ultraviolet light from projection 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 described 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, described projection lens 260 can filtering enters visible light and ultraviolet light in it from screen orientation, and only allow infrared light to enter 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: described imageing sensor 210 will be multiplexed with its collection lens as the projection lens 260 of image projection and gathers 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 described 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 wish the zone that covers, therefore 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 described projection lens 260 according to projection path, arrive imageing sensor 210 at last, described 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 by its projection image and the image by its collection 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 system 300 that touches measuring ability.Described LCD projection display system 300 shown in Fig. 3 is similar with the structure major part of the LCD projection display system 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, described optical prism assembly 349 includes three relatively independent optical prism 349A, 349B and 349C, described optical prism assembly 349 can be with the full-colour image that is combined as from the three primary colors image of display panels by these three optical prisms, and is projected on the screen 380 by 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 described optical prism assembly 349, described 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, described infrared light 304 will penetrate described projection lens 360 to described optical prism 349B along projection path, described optical prism 349B can reflex to described optical prism 349C with described infrared light 304, and described optical prism 349C then can reflex to described imageing sensor 310 with described infrared light 304.
The mode of the screen generation infrared light of object touch projection display system has a variety of, introduces several practical modes below.
In one embodiment, just as 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), described infrared transmitter emission infrared light or near infrared light arrive the back side of described 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 described 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 described screen, described 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 realizes the generation of infrared light, described 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 described 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) is run into the acrylic surface, total internal reflection is destroyed, and Infrared is reflected by finger.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 do not need really to 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 enters projection lens.Hereinafter enumerated a kind of specific implementation example of described 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 determining 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.Described infrared image sensor 210 or 310 detected picture signals can be transfused to described image processing module 400.As shown in Figure 4, described 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 specific implementation, be stored in program codes in the described storage unit 422 and make described micro-control unit 424 synchronous all other unit catch one or more contacts on the image with calculating.When operation, described AD conversion unit 420 is a digital picture with the image transitions that receives, and described digital picture can be cached in the described storage unit 422.The view data that described micro-control unit 424 extracts from described storage unit 422, and instigate described Flame Image Process and enhancement unit 426 to be handled according to pre-defined algorithm and strengthen described view data.Described contact coordinate computing unit 428 receives the image after enhancing and the processing, and calculates the coordinate of infrared input or touch.Described result 430 inputs to external device (ED) carrying out subsequent operation, such as the motion of determining the contact etc.
Fig. 5 shows an example of uniting the infrared pen 500 of use with infrared image sensor.Described infrared pen 500 has handwriting 510.One end of described handwriting 510 has transparent window 520, and the other end has knock-downly uncaps 580.Offer battery space 550 in the described infrared pen, take described uncapping apart and the batteries in the battery space 550 can be taken out or operate the batteries in the battery space 550 after 580, described battery electrically connects by the switch on power control circuit 540 and the handwriting 510 560 and at least one infrared LED 530.Described infrarede emitting diode (IR LED) 530 is positioned at the back of described transparent window 520, and when described infrared LED 530 was launched infrared rays, described infrared ray can outwards be launched by described transparent window 520.Described switch 560 can be controlled the opening and closing of described infrared LED 530.
Fig. 6 shows an embodiment of the desktop computer (table computer) 600 with multiconductor measuring ability.Described 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 interior optical projection system 630 of a body 610 cavitys.Described optical projection system 630 can be the every other part except screen of projection display system among Fig. 2 or Fig. 3.Described like this desktop computer is not provided with infrared camera, can have the multiconductor measuring ability yet.In an other embodiment, described desktop computer 600 also includes the infrared LED 640 that is arranged at the emission infrared light in the cavity.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement etc., all should be included within protection scope of the present invention.
Claims (10)
1. LCD projection display system 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 described 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 described optical prism assembly is combined as panchromatic optical imagery with three kinds of primary colour images;
Projection lens, the panchromatic optical image projection that described light engine is generated and allow to see through from the infrared light of described screen to described screen; With
Imageing sensor, induction from the infrared light of described projection lens to form sensed image.
2. LCD projection display system as claimed in claim 1 is characterized in that: when having a plurality of touch point on screen, each touch point all can form an infrared light, and described infrared light is transmitted to described imageing sensor by described projection lens.
3. LCD projection display system as claimed in claim 1 is characterized in that: it also includes image processing module, and described image processing module receives the sensed image from imageing sensor, and determines the coordinate of infrared light based on described sensed image.
4. LCD projection display system as claimed in claim 1 is characterized in that: described projection lens filtering or subdue visible light and ultraviolet light from screen.
5. LCD projection display system as claimed in claim 1, it is characterized in that: the side at the projection lens of screen is provided with infrared transmitter, described infrared transmitter emission infrared light or near infrared light are to the back side of described screen, when described screen is touched, but each touches equal reflected infrared to described projection lens side.
6. LCD projection display system as claimed in claim 1, it is characterized in that: described screen includes an acryl layer at least, at the edge of acryl layer installing infrared transmitter, the infrared light of described infrared transmitter emission does not stop reflection in acryl layer, when described screen was touched, Infrared can be reflexed to described projection lens side from the touch place.
7. as each described LCD projection display system among the claim 1-6, it is characterized in that: it also comprises the catoptron between described optical prism assembly and projection lens, described catoptron allows to see through self from the panchromatic optical imagery of optical prism assembly, and reflection from the infrared light that sees through projection lens of screen to imageing sensor.
8. as each described LCD projection display system among the claim 1-6, it is characterized in that: described optical prism assembly directly will cause imageing sensor from the infrared ray optical direction of projection camera lens.
9. LCD projection display system as claimed in claim 8, it is characterized in that: described 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.
10. as each described LCD projection display system among the claim 1-6, it is characterized in that: described imageing sensor is charge-coupled device (CCD) or cmos sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102516076A CN101750857B (en) | 2009-12-28 | 2009-12-28 | LCD (liquid crystal display) projection display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102516076A CN101750857B (en) | 2009-12-28 | 2009-12-28 | LCD (liquid crystal display) projection display system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101750857A true CN101750857A (en) | 2010-06-23 |
| CN101750857B CN101750857B (en) | 2012-07-25 |
Family
ID=42477996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102516076A Active CN101750857B (en) | 2009-12-28 | 2009-12-28 | LCD (liquid crystal display) projection display system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101750857B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103376555A (en) * | 2012-04-19 | 2013-10-30 | 致茂电子(苏州)有限公司 | Optical image capture device |
| CN104054399A (en) * | 2012-01-20 | 2014-09-17 | 皇家飞利浦有限公司 | Light Detector |
| CN105143943A (en) * | 2012-12-26 | 2015-12-09 | 神画科技（深圳）有限公司 | Projection system with infrared light source |
| CN109933250A (en) * | 2019-03-26 | 2019-06-25 | 京东方科技集团股份有限公司 | Display module, display device and display equipment |
| CN110703485A (en) * | 2019-09-18 | 2020-01-17 | 昆山龙腾光电股份有限公司 | Liquid crystal display panel and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101464745B (en) * | 2007-12-17 | 2012-07-18 | 北京汇冠新技术股份有限公司 | Back projection light source type touch recognition device and method thereof |
-
2009
- 2009-12-28 CN CN2009102516076A patent/CN101750857B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104054399A (en) * | 2012-01-20 | 2014-09-17 | 皇家飞利浦有限公司 | Light Detector |
| 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 |
| CN105143943A (en) * | 2012-12-26 | 2015-12-09 | 神画科技（深圳）有限公司 | Projection system with infrared light source |
| CN109933250A (en) * | 2019-03-26 | 2019-06-25 | 京东方科技集团股份有限公司 | Display module, display device and display equipment |
| 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 |
| CN110703485A (en) * | 2019-09-18 | 2020-01-17 | 昆山龙腾光电股份有限公司 | Liquid crystal display panel and manufacturing method thereof |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101750857B (en) | 2012-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101776836B (en) | Projection display system and desktop computer | |
| CN101762956B (en) | LCOS projection display system | |
| KR100939501B1 (en) | Multimedia player displaying 2 projection images | |
| CN101750857B (en) | LCD (liquid crystal display) projection display system | |
| US7525538B2 (en) | Using same optics to image, illuminate, and project | |
| US8847907B2 (en) | Display device and display direction switching system | |
| CN104076914B (en) | A kind of electronic equipment and method for displaying projection | |
| CN103324012B (en) | Interactive projection device | |
| US9436275B2 (en) | Transmissive display apparatus and operation input method | |
| US20090219253A1 (en) | Interactive Surface Computer with Switchable Diffuser | |
| US20090276734A1 (en) | Projection of Images onto Tangible User Interfaces | |
| CN104660946B (en) | Projector and its control method | |
| WO2010079647A1 (en) | Area sensor, liquid crystal display unit, and position detection method | |
| US20160021351A1 (en) | Optical system and device having optical system | |
| CN107742492B (en) | Transparent display system and display method thereof | |
| KR101488287B1 (en) | Display Device for Recognizing Touch Move | |
| JP2008165077A (en) | Image projector | |
| JP4586370B2 (en) | Projection display device and projection display method | |
| CN101762955A (en) | LCOS (liquid crystal on silicon) projection display system | |
| US7167619B2 (en) | Interactive display system having a matrix optical detector | |
| WO2021135587A1 (en) | Projection device and projection interaction method | |
| JP2022026562A (en) | Pointer detection system, display system, and method of detecting pointer of pointer detection system | |
| CN116783644A (en) | Space suspension image display device | |
| KR20130123259A (en) | Pointing system | |
| JPH1020396A (en) | Overhead projector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ding Shiyu Inventor after: Li Xing Inventor before: Hu Dawen |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HU DAWEN TO: DING SHIYU LI XING |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |