CN1084000A - High-resolution colour light display - Google Patents

Abstract

A kind of high-resolution colour light display, it adopts the light beam through red, blue, green three mixture of colours of video modulation, by row electro-optical deflection, an electro-optical deflection, forms scanning light beam and directly form chromatic image on display screen.Its structure is made up of three color scheme system light source, convergent pencil of rays system, light beam horizontal beam deflector, field deflection device, screen scanning focusing system, imaging screen.That high-resolution colour light display has is simple in structure, easily manufactured, cost is low, in light weight, colour is bright-coloured, definition is high, no high voltage, no high vacuum, working stability, dependable performance is made the large-screen Flat Panel Display easily.Can accomplish that projection and direct-view dual-purpose show; It is simple to produce debugging simultaneously, especially can realize high definition, large scale display.

Description

High-resolution colour light display

This practicality invention relates to the color television set in video technique field.

The display of existing color television set has: cathode-ray tube display, LCD, the cathode ray tube projection display, liquid crystal projection display, and present up-to-date laser projection tv display.Their feature is: cathode ray tube color display and projection colour TV, all adopted three high-velocity electron beams to bombard separately fluorescent material and make red, blue, green fluorescence powder send corresponding color.Because the fluorescent material color dot is very little, eyes just produce secondary colour when watching beyond certain distance, form various color images.Need high vacuum, very tiny shadow mask and the little color dot of three fluorescence on the cathode-ray tube display processing technology.Need high-tension circuit, large power, electrically magnetic deflection coil on the circuit, simultaneously managed interior vacuum degree of the life-span of cathode ray tube, the influence of electron gun degree of aging.LCD is because color dot is too many, and local display dot is damaged will cause the whole image defective.The imaging control system of LCD is very complicated simultaneously, cost is high.Laser television is difficult at a high speed long-play down because of the price height and the present rotary light deflector of laser tube, and laser also has certain harm to human body simultaneously.The device of acousto-optic video modulation laser beam also is difficult to popularize at present, makes laser television can not become universal commodity.

The purpose of this practicality invention: be to design the shortcoming that to eliminate above-mentioned various television indicators, improve the fidelity of brightness, definition and the color of display, improve the life-span of display, eliminate high voltage circuit and high tension apparatus, realize large screen display in light weight, definition is high.The target of flat-panel screen

The main points of this practicality invention are: high-resolution colour light display structured flowchart (accompanying drawing one), and by red, blue, green three-color mixed light source plate 1, the concave mirror of video modulation.The beam convergence device 2 of little convex lens group, row vacuum tube electro-optic deflector 3, an electro-optic deflector 4, light beam imaging focus on convex lens group 5, flat stone mill sand glass imaging screen 6 is formed.Basic principle: high definition optical display unit light path principle figure (accompanying drawing two) light source is by red, blue, the green three kinds of light-emitting diodes of electric current input after the vision signal modulation.Because the light-emitting diode response speed is exceedingly fast, be easy to satisfy the present 6MHZ video modulation of realization.As adopt quick light-emitting diode can also realize the video modulation of high definition 1125 row, red, blue, green three kinds of light-emitting diodes were arranged on the disk by even mixing of equal number, the parallel rays that light-emitting diode sends is assembled the back by this concave mirror and is formed red, blue, green mixed light beam by little convex lens group, this light beam is penetrated on the speculum of per second 15625HZ rotational deflection, by forming a light belt on the beam reflected deflector reflective mirror on the scene.Because the reflection of vibration deflection reflective mirror is with the light belt of 15625HZ, the field frequency deflecting reflection of pressing 50HZ forms per second 50 width of cloth on the ground glass screen, every 312,5 row, interleaved light image.Condenser lens is adjusted to suitable thickness with the scan line on the ground glass screen, so that make image more clear.Because red, blue, green three kinds of light are mixed into light beam, so a luminous point on the screen of ground glass is formed by three kinds of blend of colors.And the various display colours except the laser television at present are made up of red, blue, green three color dots of adjacent arrangement, thus the definition of honorable look display than present cathode ray tube and liquid crystal definition, brightness is bright.

That this practical invention high-resolution colour light display has is simple in structure, easily manufactured, cost is low, in light weight, bright in luster true to nature, definition is high, no high voltage, no high vacuum, working stability, not affected by magnetic fields, dependable performance, make the large-screen Flat Panel Display easily, produce debugging simply, the life-span is long, aging.

It is following that three pairs of this practicality inventions further specify with reference to figure:

See the structural representation of accompanying drawing three high-resolution colour light displays, red, blue, the green three kinds of light-emitting diodes of the electric current of video modulation input make that light-emitting diode light is bright secretly to be changed with vision signal.Because the some light that the optically focused of the ball face of light-emitting diode chip for backlight unit front sends the chip of light-emitting diode becomes parallel rays and penetrates on concave mirror.Because the reflecting surface effect of concave mirror will all be focused on the focus at the directional light on the concave surface, form subparallel light beam by little convex lens group, this light beam is penetrated on the electric light reflection deflecting mirror of being expert at.The row light deflector is external existing at present to be that laser projection tv is used, and their light deflection is to adopt high-speed electric expreess locomotive to drive the deflection of multiaspect mirror drum drum folded light beam, reach television set line frequency 15625HZ and must make 24 mirror drum reach 651 revolutions per seconds.Promptly 39060 rev/mins high-speed.Therefore light rotates the life-span weak point of deflector, and poor reliability and difficult with the synchronous tracking of vision signal is one of key issue of laser television practicability difficulty.Capable electro-optic deflector in this practicality invention adopts the deflection or the high-speed vacuum pipe electro-optic deflector of multiaspect mirror drum.See embodiment.Be expert under the control of deflection current, this electro-optic deflector with the light beam injected by the speed deflection of 15625HZ and reflect and form a light belt on the electro-optic deflector on the scene, by 50HZ scanning line focus convex lens scanning imagery on the ground glass screen of field electro-optic deflector.When video was danger signal, blue LED did not work, and green LED does not work yet, and red light emitting diodes is bright, and red beam is scanned into the image of red scan line on the glass screen of frosted.During white video signal, red, blue, green light-emitting diode is bright entirely, and the mixture of white light beam is scanned into the image of white scan line on the glass screen of frosted.Because adopt to be similar to camera and to find a view the frosted flat glass of usefulness, realized the flat square optical display unit of large-screen easily as the optical screen curtain.

Embodiment one

Existing 625 row television system light high definition color monitors (seeing accompanying drawing three), light source is with respectively 200 of red, blue, green three kinds of light-emitting diodes tube cores.Blue LED is at present domestic not to be produced, the existing manufacturer of Japan.As the display that does not have blue LED can be made terminal display usefulness.These 600 chip of luminescent tube are evenly arranged on the round printed circuit board (PCB) 1 that diameter is 75mm, each chip power 100mw, during the strong white light of light source maximum power is 60 watts, and chip sends point-source of light and converts parallel rays to and realized by the little convex lens 1 of the honeycomb fashion that is contained in the chip front.The little convex lens structures sketch of honeycomb fashion is seen accompanying drawing three (1), and each little convex lens is corresponding one by one with each chip, and make chip just with little convex lens apart from parfocal.Reflective is 75mm with focal length, and diameter is the 2 reflective focusing of 75mm concave mirror.Adjustable lens group that little focal length convergent pencil of rays is used 2 changes into light beam with light, the structure chart accompanying drawing three (2) of beam convergence device does not have wearing and tearing reflection vibration type electrooptical deflector 3 at a high speed as the deflection of line scanning light with vacuum tube, row electro-optic deflector structure chart accompanying drawing three (3), the application for a patent for invention file of seeing patent application 91108445,2 vacuum-tube vibration type electrooptical deflectors in detail of this electro-optic deflector.Field deflection said structure electro-optic deflector 4, field electro-optic deflector structure chart accompanying drawing three (4), but the field deflection device is not to be contained in the vacuum tube, because of volume is bigger, deflection speed is slow, the needing no vacuum condition, between the screen of deflector on the scene and ground glass, by an electro-optic deflector next door light beam focus lens group 5 is housed, its effect makes light beam regulate to such an extent that thickness is suitable at the optical scanning line of screen 6, and picture is clear.Present embodiment adopts 6MHZ video modulation lumination of light emitting diode 15625HZ line frequency electric current and a job of 50HZ field frequency Current Control row electro-optic deflector and an electro-optic deflector job, the ground glass screen adopts 4: 3 screen of 32 inch wide, at high proportion, level that optical scanning produces on the screen on plane and vertical nonlinear distortion, saw-tooth wave generating circuit by row, field is proofreaied and correct, the video line field synchronization is similar with general television circuit, and at this moment the chromatic image definition of screen is with more many than present cathode ray tube color display raising.Display brightness depends on luminous tube quantity, and the quiescent current ratio of regulating three kinds of luminous tubes plays white balance adjusting.

Claims (3)

1. A kind of colour light display with the imaging of the direct plane of scanning motion ground glass of light beam screen.It is the light source with the direct modulated red of video current, indigo plant, green Tricolor LED, utilize the little convex lens group of honeycomb fashion that the some light that light-emitting diode chip for backlight unit sends is become parallel rays, utilize concave mirror and lenslet group then, parallel rays is gathered into penlight, through row electro-optic deflector, an electro-optic deflector, deflected beam, by focusing on the high-resolution colour light display that the convex lens group directly scans the imaging of ground glass screen.It is characterized in that:

   1, makes the display video modulated light source with the light-emitting diode chip for backlight unit group.
2. 2, the point-source of light clustering beam system of forming with the little convex lens group of honeycomb fashion, concave mirror, lenslet group.
3. 3, make the imaging screen with the flat glass of frosted.

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