CN1255024A - Helmet-type non-flicker multi-sytsem full-compatible stereoscopic TV technique - Google Patents

Abstract

A stereoscopic TV technique features that planar colour full TV image signals in different systems and time-division stereoscopic ones can be compatibly received, said both TV image signals can be displayed by two individual colour LCDs without flicker, and the dual-eye aggregation imaging system and specially designed glasses or helmet structure is used. Its advantages are dual-eye aggregation to reduce visual fatigue and comfortable wearing it.

Description

Helmet-type non-flicker multi-sytsem full-compatible stereoscopic TV technique

Utilize the helmet-type TV tech can be made into the helmet-type video display, it can be worn on observer's head easily as glasses, and can provide bigger visual field, higher definition and telepresenc more true to nature to the observer, its application relates to all many-sides such as emulation, military affairs, Aeronautics and Astronautics, amusement, tourism and education, have great market potential, therefore be subjected to the attention of the more and more wider model of various countries scientific research department and manufacturer.

The present invention relates to a kind of flicker free, multi-modulation scheme, complete compatible helmet-type stereo TV technique.It can receive the planar coloured full television image signal and the full television image signal of time division type multi-modulation scheme stereo colour of multiple standard compatiblely, can pass through two independently color liquid crystal display device display plane colour TV image and time division type color solid television images.Since adopted analog to digital conversion circuit, every the field store digital odd field picture signal and every field storage even field picture intelligence, continuously reading number odd field picture signal form digital odd field image sequence and continuously reading number even field picture signal form digital even field image sequence, respectively above-mentioned signal is sent into two color liquid crystal display devices drive circuit, drive two color liquid crystal display devices and show left eye picture intelligence and right eye picture intelligence respectively.Distribute 50HZ or 60HZ because the display frequency of liquid crystal display cells is every eye, therefore no matter watching plane picture still is the equal flicker free of stereo-picture.The present invention has also adopted the optical imaging system that eyes are assembled in addition, therefore helps binocular single vision and alleviates visual fatigue.The present invention has adopted spectacle and two kinds of structures of helmet-type, therefore is convenient to more wear and carry.

Below in conjunction with accompanying drawing the present invention is described in more detail.

Fig. 1. be theory diagram of the present invention.Wherein 1 is SVCD, CVD, VCD or DVD miniature video playing device, the 3rd, and video VHS or other recording playback are as equipment, and they provide full TV color picture signal in plane or the colored full television image signal of time division type.The 2nd, the video decode circuit, it forms luminance signal and carrier chrominance signal with vision signal decoding back, these two groups of vision signals are admitted to analog to digital converter 4 respectively, it carries out analog-to-digital conversion to two groups of luminance signals and carrier chrominance signal through 2 inputs respectively, forms digital luminance signal and two groups of digital chrominance signals.Two groups of digital luminance signals of after the conversion this and digital chrominance signal are write with odd field respectively again and are enabled to write enable write admission memory 5 and 6 with even field, two field memories that contain in 5 wherein, store odd field digital brightness picture intelligence and odd field digital chrominance signal respectively, and two field memories that contain in 6 store even field digital brightness picture intelligence and even field digital chrominance signal respectively.The 7th, the read-write generator, it sends read-write and read-write enable signal, realizes that above-mentioned writing enables control.Read continuously with the field frequency frequency by odd field digital brightness picture signal and odd field digital color picture intelligence that 7 read signals that send will store in the memory 5 on the scene, form a digital odd field sequence brightness picture signal and sequence colourity picture signal.The even field digital color picture signal that to store the even field digital luminance signal in the memory 6 on the scene simultaneously and store in the memory 6 on the scene is also read continuously with the field frequency frequency, forms an even field Serial No. luminance picture signal and sequence carrier chrominance signal.Numeral odd field sequence brightness picture signal and sequence colourity picture signal are admitted to digital to analog converter 9, are converted into simulation odd field luminance signal and simulation odd field carrier chrominance signal.Even field Serial No. luminance picture signal and sequence carrier chrominance signal are admitted to digital to analog converter 8, are converted into simulation even field luminance signal and simulation even field carrier chrominance signal.8 will simulate the odd field luminance signal and carrier chrominance signal is sent into decoder and liquid crystal display drive circuit 12, the odd field coloured image that R, G, B signal and the liquid crystal display-driving signal that is solved is admitted to LCD 20,20 demonstrations passes through the left eye 16 that lens combination 14 offers the observer.Another way weighted-voltage D/A converter 9 output even field analog luminance signal and even field analog chrominance signals, and be admitted to the decoding and its drive circuit 13 of liquid crystal display, 13 solve R, G, B signal and liquid crystal display drive signal after, the even field coloured image that drives LCD 21,21 demonstrations offers observer's right eye 17 through lens combination 15.If 1 and 3 what play is full TV color plane television image signal, although what then LCD 20 and 21 showed respectively is odd field image and even field image, but because there is not binocular vision difference in this parity field image, therefore the observer still can scioptics system 14 and 15 see the color plane television image, each field frequency of this image is 50HZ or 60HZ, exceed the human eye critical flicker frequency, therefore do not have the sensation of image flicker.If 1 and 3 what play is the colored time-division three-dimensional television image signal of full TV, then because LCD 20 and 21 shows respectively is to have different odd field image of binocular parallax and even field image, so the observer understands scioptics system 14 and 15 and sees the color solid television image.Because this image is every 50HZ or 60HZ field frequency, exceed the critical flicker frequency of human eye equally, therefore do not have the sensation of image flicker.16 and 17 represent observer's left eye and right eye respectively, and 18 and 19 is observer's Brodmann areas, when the observer observes by 20 and 21 left-eye image that show and right eye image, promptly form stereo-picture in observer's Brodmann area.

Fig. 2. be the parallel convergence imaging schematic diagram of general helmet-type video display.General helmet video display technology all adopts this binocular parallel imaging principle design optical imagery element, and the characteristics of this way are that simplicity of design, Installation and Debugging are easy.Therefore shortcoming is to form " screen sense ", can't form stereo-picture " sensation of outstanding screen ", can't allow forever also spectators feel to the peculiar sensation that " blows against one's face " to spectators of stereo-picture.In addition because to utilize binocular parallel imaging principle be to run counter to the imaging requirements of binocular haplopia, when spectators watch the helmet-type video display that adopts the parallel imaging principle to make visual, binocular diplopia appears in the edge part branch in LCD, it is special when the picture material focus that is shown appears at the marginal portion of LCD, the binocular convergence image can run into serious difficulty, in order to realize binocular convergence, regulating consumingly will appear in people's lens of both eyes, converge like the spokes of a wheel at the hub and assemble contradiction reflection causes serious visual fatigue thus and finally causes image can't be converged to the result of picture.22 and 23 is two parallel optical axis of reflection parallel imaging principle.28 is examples of a stereo vision, and as can be seen, owing to adopt the method for parallel imaging, stereo vision has been limited widely.The 26th, the focusing distance of parallel imaging principle is because the binocular sight line is parallel, so can only be focused at unlimited distance.The 27th, the stereo-picture that synthesizes, it can only be presented on far position, can't give prominence to the close shot that is shown object.

Fig. 3. be binocular convergence imaging schematic diagram of the present invention.It is not arranged parallel that the vision signal of being sent here by liquid crystal display drive circuit and decoding circuit is admitted to LCD 20 and 21,20 and 21, but forms certain included angle, can before eyesly assemble to guarantee observed image of left eye and the observed image of right eye.14 and 15 are mounted in the set of lenses of LCD 20 and 21 fronts, it has changed spectators is exaggerated the size of LCD screen for LCD 20 and 21 open eyes visual angles, is formed into the picture curved surface simultaneously at distance LCD 24 places, position far away.22 and 23 is with two perpendicular optical axis of the screen of LCD, and they are assembled in the not far place of distance eyes, form convergent angle 26.The 24th, because the picture of two LCD screen that assemble to form, because the influence of convergent angle 26, this assembles screen has not been a plane but a curved surface, but because convergent angle is very little, so this convergence plane remains almost plane.Because stereo vision is than big many of parallel imaging method, and eyes contention problem can not occur, so there is not the phenomenon of binocular diplopia, spectators watch this image can feel more comfortable, greatly reduce visual fatigue.When LCDs shows three-dimensional tv images, the stereo-picture 25 of all intersection parallaxes will be given prominence to assembling outside the screen 24, near observer's glasses, produce the sensation when participating in the cintest of " ready to appear ".Can deeply assemble in the screen 24 but not intersect the stereo-picture 25 of parallax, form far-reaching sensation.So just make this helmet-type video display technology have more ornamental value.

Fig. 4. be one embodiment of the present of invention.The 50th, the colored full TV plan view image signal of input or colored full TV time-division three-dimensional television image signal can be the TV signal of PAL and TSC-system formula.The 30th, the general full system type pictorial decoding circuit of color TV, it is decoded as luminance signal and carrier chrominance signal with above-mentioned vision signal, the 32nd, analog to digital conversion circuit, can constitute by two TCL59101, it is converted to two-way digital luminance signal and digital chrominance signal with luminance signal and carrier chrominance signal, and sends into and contain two field memories in a memory 33 and 35,33, also contain two field memories in 35, they can be made up of MSM518222 behind the MSM518221.Reading generator 31 sends odd field and writes enable signal and make two field memories in 33 only store odd field digital brightness picture signal and odd field digital color picture intelligence.Reading while write pulse generator 31 sends even field and writes enable signal and make two field memories in 35 only store even field digital brightness picture signal and even field digital color picture intelligence.31 send the continuous read signal with input field frequency unanimity again, make that odd field digital brightness picture intelligence and the odd field digital chrominance signal in 33 read continuously, form odd field Serial No. picture intelligence, and are admitted in the digital to analog converter 34 one.31 send the continuous read signal with input field frequency unanimity simultaneously again, make that even field digital brightness picture intelligence and even field digital chrominance signal in 35 are read continuously, form even field Serial No. picture intelligence, and being admitted to another in the digital to analog converter 34, digital to analog converter 34 can be made up of MB40978.Two digital to analog converters in 34 are converted to the digital video signal of these two groups reflection odd field images and even field image corresponding two groups of analog video signals and are sent into the liquid crystal display drive circuit 36 and 37 that is made of two CXA250AR respectively respectively, back reflection light source 39 and 40 is lighted by high- frequency voltage generator 51 and 38, for LCD provides illumination.LCD 41 and 42 is respectively observer's left eye and the coloured image that right eye provides every 50HZ or every 60HZ under by 36 and 37 drive of sending.When input signal 50 is the planar coloured TV image signal of full TV, LCD 41 and 42 shows parallax free color plane television image, when input signal 50 is full TV time-divisions during the stereo colour TV picture signal, LCD 41 and 42 shows the three-dimensional television image of parallax.43 and 44 is completely reflecting mirrors, and 46 and 47 is lens, and LCD Panel is amplified two images through 43,44 and 46,47, assembles the back through eyes and forms stereo-picture at 45 places.In order more clearly to explain above-mentioned optical imaging system, we are further detailed with end view.39 and 40 is back reflection light sources of LCD Panel, and 41 and 42 is LCD Panel, and 43 and 44 is completely reflecting mirrors, and 46 and 47 is lens, and 49 and 48 is eyes of observer.The 45th, through completely reflecting mirror 43 and 44, lens 46 and 47 form stereo-picture.

Claims (3)

1. the present invention relates to a kind of helmet-type non-flicker multi-sytsem full-compatible stereoscopic TV technique, its essential characteristic is, input signal is planar coloured full television video frequency signal or the full television video frequency signal of time-division stereo colour, this input signal is converted to digital brightness picture intelligence and digital color picture intelligence through analog to digital converter, these two digital signals are admitted to four field memories, wherein two field memories are subjected to writing and enable to control, only write the odd field input signal, and in addition two field memories also are subjected to writing and enable control, only write the even field input signal, storage has the field memory of odd number number of fields word luminance signal and odd field digital chrominance signal to be read continuously by the field frequency frequency with input signal, form odd field digital brightness picture intelligence sequence and odd field digital chrominance signal sequence, and be admitted to decoder and liquid crystal driver and drive a colour liquid crystal display device and show the odd field coloured image, offer observer's left eye by optical imaging device, and storage has the field memory of even field digital luminance signal and even field digital chrominance signal also to be read continuously by the field frequency frequency with input signal, form even field digital brightness picture intelligence sequence and even field digital chrominance signal sequence, and be admitted to another decoder and liquid crystal driver and drive the another colour liquid crystal display device and show the even field coloured image, offer observer's right eye by the another optical imaging device, observer's left eye can only be seen the left eye image by the odd field record, and right eye can only be seen the eye image by the even field record, when input signal is planar coloured full television video picture signal, the observer sees the color plane image, when input signal is the full TV image signal of time-division stereo colour, the observer sees the color solid image, two liquid color displays are installed in the observer at the moment, the observer wears this video image Observating appts as wearing glasses, form a kind of helmet-type stereoscopic TV.

Described in the claim 1 " ... two liquid color displays are installed in the observer at the moment ... " its essential characteristic is, two LCD are not arranged parallel, they form certain included angle, can before eyesly assemble to guarantee the image that image that observer's left eye is seen and right eye are seen.

Described in the claim 1 " ... optical imaging device ... ", its essential characteristic is that this optical imaging device is made up of completely reflecting mirror and lens.

Images