CN2065363U - Single-gun and single-beam crt - Google Patents

Abstract

The utility model relates to a single-gun and single-beam color picture tube, being mainly composed of a cathode (1), a control grid (2), an accelerating cathode (3), a focusing electrode (5), an anode (3), an anode (5), a signal delayer (9), a deflecting coil (10), etc. Tricolor signals which are controlled by the signal delayer can be sent to the cathode in sequence, electron beams which are emitted by the cathode can hit fluorescent powder of corresponding primary colors on a fluorescent screen in sequence to emit light, and color pictures can be formed by the scanning of the electron beams. The color picture tube has the advantages of simple structure, easy production and regulation, low cost, high light emitting efficiency, less deformation, clear picture and sensitive control.

Description

Single-gun and single-beam CRT

The utility model relates to a kind of picture tube, particularly a kind of single-guns single-beam chromoscope.

At present, the picture tube that color television set is commonly used is a trinitron, and this picture tube has three negative electrodes separately, Wehnelt electrode, assemblies such as intensifying ring, high-voltage anode, converging plate, aperture plate (or shadow mask), phosphor screen, deflecting coil.Television set receives decode red, green, blue three primary colour signals, be added to divergent bundle on corresponding three negative electrodes of picture tube, three electron beams pass Wehnelt electrode, quicken by intensifying ring, the electronic lens focusing that anode and focusing electrode form, effect with electrostatic field between converging plate converges at a bit three electron beams before phosphor screen, beat respectively on the corresponding primary colours phosphor strip of phosphor screen by aperture plate (or shadow mask), phosphor screen sends and the corresponding primary lights of primary colour signal, under the control of deflecting coil, electron beam is got about 1,200,000 fluorescent material points on phosphor screen, constitute a width of cloth chromatic image.But the complex structure of this picture tube, assembly is many, the specification requirement height, produce and the debugging installation difficulty big, by assemble, aperture plate distortion and magnetization form image deflects, definition, luminous efficiency are low, power consumption is big.

The purpose of this utility model provides a kind of chromoscope of new construction, a kind of single-guns single-beam chromoscope.

The purpose of this utility model can reach by following measure: the single-guns single-beam chromoscope is provided with a negative electrode, control grid, intensifying ring, focusing electrode, high-pressure stage, phosphor screen, deflecting coil and signal delay device.Television set receives the tristimulus signals that decode, control by the signal delay device is given the cathode emission electron beam in certain sequence tristimulus signals, electron beam scans on phosphor screen, press the corresponding colored vermicelli of order strike phosphor screen that tristimulus signals transmit, send and the corresponding primary lights of tristimulus signals, constitute colour picture.

The utility model has following advantage compared to existing technology: picture tube simple in structure, have only a negative electrode, and launch single beam electrons scanning imagery, do not need converging plate and aperture plate (or shadow mask).Electron beam is direct impact fluorescence screen after modulation is quickened, focused on, the luminous efficiency height, control is sensitive, and the imaging resolution height has been eliminated the distortion of convergence and aperture plate, magnetized the distortion distortion that causes, the scan deflection of single electron beam is easy, consumed power is low, and the manufacturing of picture tube is simple, and debugging easily, cost is low, the production efficiency height.

The utility model description of drawings is as follows:

The structure chart of Fig. 1 single-guns single-beam chromoscope.

The line map of Fig. 2 signal delay device.

With reference to Fig. 1, the negative electrode (1) that an energy emitting electrons is arranged in the single-guns single-beam chromoscope, the negative electrode place is a foraminate control grid in center (2), change the power that control grid and the relative current potential of negative electrode come controlling electron beam, generally, on negative electrode, add primary colour signal and come modulated electron beam the control grounded-grid.Intensifying ring (3) is controlled grid relatively and is added with certain voltage, move in order to accelerated electron beam, the voltage that focuses on (5) forms an electrostatic field in the developing neck, and form between negative electrode (4) and anode (6) electron beam is focused on the electron lens that plays a major role, adjust the voltage of focusing electrode (5), can adjust focusing, anode (4) and anode (6) connect together and add extra-high voltage.Quicken and attraction electron beam high speed impact fluorescence screen, the three primary colors fluorescent powder on the phosphor screen (8) circulates from left to right by the red, green, blue order and paints vertical strip.Overlayed on above the fluorescent material by aluminium film (7), the inside and outside wall of the conical section of glass shell (11) scribbles graphite layer (12).Corresponding the joining of tristimulus signals output of the signal input part of signal delay device (9) and circuit decoding, the output of signal delay device (9) connects negative electrode (1), deflecting coil (10) controlling electron beam deflection and finish scanning.

The tristimulus signals of colour TV are given signal delay device (9), danger signal is directly given electron gun by the signal delay device, divergent bundle hits the corresponding red fluorescence powder of phosphor screen, give electron gun behind the standard lag line of green by the signal delay device, the electron beam deflecting hits phosphor screen respective green fluorescent material, two standard lag lines of blue signal messenger delayer are given electron gun, the electron beam deflecting hits fluoroscopic blue colour fluorescent powder, in this order, tristimulus signals are by the control of signal delay device, give the electron gun divergent bundle in order and hit corresponding three primary colors fluorescent powder, send corresponding colourama, the scanning of electron beam forms colour picture.Signal delay device line map is with reference to Fig. 2, and the signal delay amount is as follows:

1 standard lag line=(active line sweep time)/(colored vermicelli line number of phosphor screen)

The control of single-guns single-beam used for color picture tube signal delay device is given the negative electrode of electron gun in order tristimulus signals, the modulate emission electron beam, and to shield corresponding three primary colors fluorescent powder luminous through quickening, focus on direct impact fluorescence, forming colour picture.

Claims (2)

1, single-guns single-beam chromoscope, mainly by phosphor screen, deflecting coil, control grid, intensifying ring, focusing electrode, high-voltage anode are formed.The base feature is the negative electrode [1] that is provided with a signal delay device [9] and an emitting electrons, and tristimulus signals are given the scanning of electron gun divergent bundle in sequence by the control of signal delay device.

2, chromoscope according to claim 1 is characterized in that the signal delay device directly exports the primary colour signal in the tristimulus signals, and two primary colour signals are respectively by a standard lag line and two standard lag lines outputs in addition.

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