CN1571520A - A TV set without screen and signal display method thereof - Google Patents

Abstract

The present invention relates to a TV set without screen and signal display method thereof. At present, the televisions used by people are television set with screen. The television set with screen displays the received television signal by screen or other screens and has the following faults: the image is small and can not be seen clearly from far distance, the screen is 30 inches and the maximum size is about 50 inches. The invention provides a TV set without screen and signal display method thereof, the advantages of the TV set without screen is that there is no screen, the image is not limited by screen, and the TV set can be adjusted in a range of 100-300 inches based on requirement. The TV set without screen is small in volume, light in weight, convenient in movement, can be directly used for public activities such as TV set remote teaching, governmental conference, commercial matters demonstration, dissertation or the television program receiving in large guest hall in household.

Description

A kind of TV set without screen and signal display method thereof

The present invention relates to a kind of TV set without screen and signal display method thereof.

At present, big family expenses all is that the screen television set is arranged.It is received TV signal that the screen television set is arranged, and shows by phosphor screen or other screen.Following shortcoming is arranged: the one, image is little, do not see Chu at a distance.General screen is about 30 inches, and maximum is about 50 inches.As public activity such as remote teaching the time, it is too little to seem; The 2nd, volume is big, and floor space is big, moves inconvenience; The 3rd, the internal structure complexity is produced and inconvenient maintenance.

Theory structure by the screen television set generally all is made up of four major parts, is example with the pal mode, and contrast Figure of description 1 " pal mode has the theory of constitution block diagram of screen IC colour TV machine " is illustrated:

One, public passage (1).Comprise: tuning and display control circuit 4, tuner 5, SAMF6, video detection 7, video detection 8, previewing puts 9, de-noising 10, AGC11, AFT12.

Two, sound channel (2).Comprise: put amplitude limit 13 in the sound accompaniment, frequency discriminator 14, ATT15, low frequency amplifies 16.

Three, decoding circuit (3).Comprise: luminance channel 1, chroma decoding circuit 2, the primary colours matrix with look put output 3.

Comprise in the luminance channel 1: fsc trap and bright time-delay 17, bright amplification and contour correction 18, contrast adjustment 19, black level clamper and brightness regulation 20, blanking and brightness output 21.

Comprise in the chroma decoding circuit 2: carrier chrominance signal pre-process circuit 2-1., chrominance demodulation circuit 2-2., reference colours subcarrier regenerator 2-is 3..

Carrier chrominance signal pre-process circuit 2-comprises in 1.: colour band pass filter 22, ACC colourity amplifies 23, colour burst and chrominance separation 24, color saturation and colour killing control 25, ACC detection amplification 26.

Chrominance demodulation circuit 2-comprises in 2.: time-delay split circuit 27, and (B-Y) demodulation 34, and (G-Y) matrix 35, and (R-Y) demodulation 36.

Reference colours subcarrier regenerator 2-comprises in 3.: 45 ℃ of phase shifts 28, PAL identification and colour killing detection 29, bistable state 30, PAL-switch 31, APC32, VC033.

The primary colours matrix is put output and is comprised in 3 with looking: B output 37, G output 38, R output 39, deflecting coil 40.

Four, synchronous scanning system (4).Comprise: amplitude separates 41, row AFC42, line scanning 43, high-tension circuit 44, integration 45, field scan 46.

Also have in addition: complete machine power supply 47, switching power supply 48.

The decoding circuit part (3) and the synchronous scanning system part (4) of screen television set are arranged, and are for the fluorescent screen shows the peculiar structure that designs, and also are the most complicated parts.

The purpose of this invention is to provide a kind of TV set without screen and signal display method thereof, its advantage is no phosphor screen, and image is not subjected to fluoroscopic restriction, in 100～300 inches scope, can adjust arbitrarily as required.This body is long-pending little, in light weight, moves conveniently, can more satisfactory ground directly be used as public activity such as TV remote teaching, government's meeting, business presentations, lecture or family than in the stateroom to the rating of TV programme.

The present invention be with TV signal not on the phosphor screen that is connected as a single entity with television set or show on other screen, show but directly be incident upon to have in the white wall of a segment distance or the screen with television set with colourama.

Below contrast Figure of description 1 and Figure of description 2 are illustrated:

Fig. 2 is the primary structure and the operation principle schematic diagram of a kind of TV set without screen and signal display method thereof, comprise: composite video signal public passage (5), pcs signal VGA interface (6), sound channel and external voice box interface (7), DLP (abbreviation of Digital Light Processing) Digital Light Processor (8) DMD (Digital Micormirror Device) digital micromirror (9), color loop systems (10), camera lens (11), LCD (Liquid CristalDisplay) liquid crystal light valve (12), CRT manages (13), optical-electrical converter (14), speculum (15), light valve modulator (16), camera lens (17), LCD liquid crystal board (18), three dichroic liquid crystal plates (19), aggregation speculum (20), head (21).

Method of the present invention is that previewing in Fig. 1 public passage (1) is put composite colour television signal, without Fig. 1 decoding circuit (3) and synchronous scanning system (4), adopt Fig. 2 DLP processor (8) or LCD liquid crystal light valve (12) or liquid crystal board (18), finally project image with glory.

In the said method,, can select existing DLP Digital Light Processor and relevant DMD reflector (9), color loop systems elements such as (10) thereof for use if adopt Fig. 2 DLP Digital Light Processor (8) conversion regime.

The operation principle of DLP Digital Light Processor (8) is: previewing in Fig. 2 public passage (5) is put the pcs signal that composite colour television signal or Fig. 2 VGA input terminal (6) imported be admitted to DLP circuit board and memory chip, all character and pictures become pure digital signal through handling; Digital signal passes on the DMD digital micromirror (9), and this reflector is made up of the minitype reflector that surpasses 500000, and every mirror constantly switches the light of each pixel down at two states (opening or closing) according to the input condition of digital signal.By these small mirrors of switch very fast, will form an images at the reflecting surface of DMD; Image is by a color loop systems (10) that is become by red, green, blue three colour cells, filters out the color that part light produced and adds in the image; This color ring rotates the DMD digital signal of sending into by the red, green, blue order, how many small mirrors is opened or closed according to locations of pixels and color; At this moment image casts out by camera lens (11).

In the said method,, can select related elements such as existing C RT pipe, optical-electrical converter, mirror, optical modulator for use if adopt LCD liquid crystal light valve conversion regime.

The operation principle of LCD liquid crystal light valve (12) is: the light signal by CRT pipe (13) output shines on the optical-electrical converter (14), light signal is converted to the signal of telecommunication that continues variation; Outer light source produces An Intense Beam of Light, project on the light valve, speculum (15) reflection by inside, by optical modulator (16), change its optical characteristics, follow the polarizing filter of light valve closely, light with other direction of elimination, and only allow the light consistent to pass through with its optical slot direction, and this light is mutually compound with the CRT signal, and at this moment image casts out by camera lens (17).

In the said method,, can select related elements such as existing three dichroic liquid crystal plates, aggregation speculum for use if adopt LCD liquid crystal board conversion regime.

The operation principle of LCD liquid crystal board (18) is: utilize outer light source, high light is formed the RGB three-beam by spectroscope, RGB three dichroic liquid crystal plates (19) are crossed in transmission respectively, signal source is added on the liquid crystal board through analog-to-digital conversion, modulation, unlatching, the closure of control liquid crystal cells, thereby the control light path is closed light through aggregation speculum (20) again, and at this moment image casts out by camera lens (21).

In the said method, the audio signal of sound channel (7) output can be passed through audio interface, is connected to external voice box.

In the said method, used light source can adopt metal halid lamp or UHP (cold light source) or other light.

In the said method, when needs are watched network information, be connected with computer by VGA input terminal (6); The size of shown image, brightness, colourity, sound etc. are adjusted as required.

Claims (2)

1. TV set without screen and signal display method thereof, it is characterized in that TV signal not on the phosphor screen that is connected as a single entity with television set or show on other screen, show but directly be incident upon to have in the white wall of a segment distance or the screen with television set with colourama.

2. method according to claim 1, it is characterized in that previewing in the public passage (1) is put composite colour television signal, without decoding circuit (3) and synchronous scanning system (4), adopt DLP (abbreviation of Digital Light Processing) Digital Light Processor (8) or LCD (Liquid Cristal Display) liquid crystal light valve (12) or liquid crystal board (18), finally project image with glory.