KR20000059709A - front panel color cathode ray tube, driving apparatus and method for driving thereof - Google Patents

Abstract

PURPOSE: A CRT(cathode-ray tube) is provided to have properties of high luminance and low electric power by applying B/G/R signals to a B/G/R mask panel. CONSTITUTION: A thermal electron emitting panel(20) is provided with a number of heater pattern(21). A vertical mask panel(30) has a number of vertical mask holes(31), and collects the emitted thermal electrons in the vertical direction. A horizontal mask panel(40) has a number of mask holes(41), and collects the emitted thermal electrons in the horizontal direction. B/G/R mask panels(50,60,70) are sequentially stacked on the horizontal mask panel(40), and adjust collected amount of B/G/R electron beams by B/G/R mask holes(51,61,71). A fluorescent panel(80) has a dotted B/G/R fluorescent material(81) which lights by the electric beams. A front panel(90) is formed on the fluorescent panel(80). B/G/R signals are applied to the B/G/R mask panels at the same time in the operational period of one cell to prevent any erroneous rendering.

Description

Front panel color cathode ray tube, driving apparatus and method for driving

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front panel color water tube, and more particularly, to a front panel color water tube, a driving device, and a driving method suitable for an R / G / B mask method for simultaneously displaying B / G / R within an operation cycle of one cell. will be.

In general, a color receiving tube is a device for displaying a predetermined image on a screen by emitting a phosphor by emitting hot electrons, and deflecting an electron beam by a magnetic field using a deflection coil as a method of displaying grayscale by pulse width modulation. And an electrostatic deflection display method for arranging a high voltage electrode in the vicinity of the electron beam and deflecting the electron beam by an electric field.

1 is a block diagram showing a conventional color CRT using the electronic deflection display method.

As shown in FIG. 1, a conventional color receiver tube is composed of an electron gun 1, a deflection yoke 3, 4, a shadow mask 6, a fluorescent surface 5, and a high voltage power supply unit 7. As shown in FIG.

The electron gun 1 deflects the red, green, and blue electron beams through three apertures to emit the electron beams 8.

The deflection yoke 3, 4 converges the red, green, and blue electron beam 8 emitted from the electron gun 1 into one of the shadow masks 6.

In the shadow mask 6, a plurality of holes are formed in the fluorescent surface 5 to pass the electron beam 8 emitted from the electron gun 1 through one hole to emit the fluorescent surface 5.

The fluorescent surface 5 is uniformly distributed with red, green and blue phosphors on the curved glass surface 2 and is emitted by the electron beam 8 which has passed through the shadow mask 6.

The high voltage power supply unit 7 absorbs the electrons used for emitting light from the fluorescent screen 5 and supplies the high voltage power to the electron gun 1.

When high voltage power is supplied from the high voltage power supply unit 7, the red, green, and blue electron guns 1 heat internal heaters (not shown) to emit hot electrons, and the emitted hot electrons are divided into a plurality of grids ( Control, which is not shown in the figure, is emitted to the electron beam 8.

The red, green, and blue electron beams 8 emitted from the red, green, and blue electron guns 1 converge and pass through one hole of the shadow mask 6 by the deflection yoke 3, 4.

The red, green, and blue electron beams 8 passing through one hole of the shadow mask 6 hit the red, green, and blue phosphors of the fluorescent surface 5 to emit light.

However, the conventional color water pipe is bulky because the electron gun 1 and the deflection yoke 3 and 4 that emit the electron beam 8 are essential, and the high-voltage power must be supplied for the emission of the electron beam 8. There is a problem that the power is increased.

In order to solve the above problems, a color drive tube of a matrix drive and deflection system (MDS) using a micro deflection display method is illustrated in FIG. 2.

Referring to FIG. 2, the conventional MDS type color receiving tube is formed of a phosphor strip 10, a front plate 19, which is a display surface, a rear glass, and a back plate 11, which is a reflective surface, and the back plate 11. A back electrode 12 formed thereon, a filament 13 for emitting hot electrons, a control electrode 14 for selectively passing the emitted hot electrons, a single modulation electrode 15 for adjusting the amount of the electron beam according to a control signal, A focusing electrode 16 for focusing the electron beam, a horizontal deflection electrode 17 and a vertical deflection electrode 18 for controlling the vertical synchronization signal and the horizontal synchronization signal for micro deflection display on the front plate 19.

The hot electrons emitted from the filament 13 in the MDS-type color receiving tube configured as described above are converted into an electron beam through the control electrode 14 having 222 (horizontal) × 44 (vertical) holes and are transferred to the single modulation electrode 15. do. The electron beam passed through any one intersection point through the on / off switching operation of the single modulation electrode 15 is focused through the focusing electrode 16. In addition, the electron beam is micro-deflected through the horizontal deflection electrode 17 and the vertical deflection electrode 18, and then excites the phosphor strip 10 formed on the front plate 19 to display a predetermined pixel. Here, the electron beam is deflected for six pixels in the horizontal direction and ten scan lines (line) in the vertical direction, and irradiated to a fluorescent surface having an operating voltage of 13 kV. Therefore, one screen is composed of 222 x 44 parallel CRTs of 6 pixels x 10 lines.

However, such a conventional MDS type color receiver has a disadvantage in that a large number of correction circuits are added according to the deflection of the electron beam, which increases the manufacturing cost and increases the product size in order to secure a sufficient deflection distance.

In addition, since the electron beam according to the image signal is controlled by one electrode, that is, since the B, G, and R image data are controlled discontinuously within one period T ₁ of the display cell as shown in FIG. There is a problem.

In addition, the conventional color receiver has a high possibility of a mislanding phenomenon due to the micro deflection between the control electrodes.

Therefore, the present invention has been made to solve all the problems of the conventional color water tube, the object of the present invention is to reduce the volume of the color display tube (CDT), the front panel color water tube, driving suitable for luminance characteristics and high-speed response An apparatus and a driving method are provided.

Another object of the present invention is to provide a front panel color water tube that can be controlled at a minimum scanning distance and low voltage by using a B / G / R mask method that selects and scans a desired cell using different masks in two directions, It is to provide a driving device and a driving method.

1 is a configuration diagram showing a conventional color water tube (CRT)

Figure 2 is a perspective view showing a color water tube of the conventional matrix drive and deflection system (MDS) method

Figure 3 is a perspective view showing a front panel color water tube of the B / G / R mask method according to the present invention

FIG. 4 is a perspective view illustrating the hot electron emission panel of FIG. 3. FIG.

5 is a plan view illustrating the vertical mask panel of FIG.

6 is a plan view illustrating the horizontal mask panel of FIG.

7 is a cross-sectional view showing the B, G, R mask panel of FIG.

8 is a plan view showing the phosphor panel of FIG.

9 is a plan view superimposing each mask hole of FIG.

10 is a cross-sectional view illustrating a scanning process of the electron beam of FIG. 3.

11 is a cross-sectional view showing a driving circuit of the front panel color receiver of the present invention.

12 is a view showing a drive unit of the vertical and horizontal mask panel of the present invention.

13 is a waveform diagram of a driving voltage applied to FIG. 12.

14A and 14B are waveform diagrams showing a B / G / R signal application state in an operation cycle of one cell

Explanation of symbols for main parts of the drawings

1: electron gun 2: glass surface

3, 4: deflection yoke 5: fluorescent surface

6: shadow mask 7: high voltage power supply

8 electron beam 10 phosphor strip

11 back plate 12 back electrode

13 filament 14 control electrode

15 single modulation electrode 16 focusing electrode

17: horizontal deflection electrode 18: vertical deflection electrode

19: front panel 20: hot electron emission panel

21: heater pattern 22: metal electrode

30: vertical mask panel 31, 41, 51, 61, 71: mask hole

40: horizontal mask panel 50: B mask panel

60: G mask panel 70: R mask panel

80 phosphor panel 81 phosphor

90: front panel 100: vertical / horizontal sync signal detector

101: blank signal generator 102: DC / DC converter

103: triangle wave generator 104: horizontal / vertical mask panel driver

A feature of the front panel color receiver according to the present invention for achieving the above object is a hot electron emission panel for emitting a plurality of heater patterns are formed to emit hot electrons, and a plurality of vertical mask holes are formed in the vertical direction A vertical mask panel for converging, a horizontal mask panel for forming a plurality of horizontal mask holes to focus the hot electrons in a horizontal direction, and sequentially stacked on the horizontal mask panel and having B / G / R mask holes A B / G / R mask panel for adjusting the focusing amount of a G / R electron beam, a phosphor panel in which dot-shaped B / G / R phosphors are formed and emitting light by the electron beam, and an image display surface formed on the phosphor panel Including the front panel.

The driving device of the front panel color receiver according to the present invention is characterized by a horizontal / vertical sync signal detector for detecting a horizontal and vertical sync signal to be applied to a mask, and for blanking within a predetermined section of the horizontal and vertical sync signal. A blanking signal generator for generating a blanking signal, a triangle wave generator for generating a triangle wave according to the horizontal / vertical synchronization signal and a blanking signal, a DC / DC converter for supplying a stable DC voltage to the triangle wave generator, and the triangle wave generation And a mask panel driver for applying a peak voltage or a cutoff voltage to the vertical and horizontal masks according to an input signal output from the negative terminal.

Features of the driving method of the front panel color receiver tube according to the present invention is a front panel color receiver tube in which a hot electron emission panel, a vertical mask panel, a horizontal mask panel, a B / G / R mask panel, a phosphor panel and a front panel are sequentially stacked. Discharging hot electrons through a plurality of heater patterns formed on the hot electron emission panel, focusing the emitted hot electrons through the vertical or horizontal mask hole selected according to a predetermined driving voltage, and vertically or vertically. Controlling the electron beam focused by the horizontal mask through the B / G / R mask hole, and phosphor is excited by the electron beam controlled through the B / G / R mask hole to display a predetermined image. It is in that it consists of.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a front panel color receiving tube, a driving device and a driving method according to the present invention will be described in detail.

Figure 3 is a perspective view showing a front panel collar water tube according to the present invention.

Referring to FIG. 3, in the front panel color receiver of the present invention, a plurality of heater patterns 21 are formed to emit hot electrons, and a plurality of hot electron emission panels 20 and a plurality of vertical mask holes 31 are formed to form the hot electrons. A vertical mask panel 30 for focusing in the vertical direction, a horizontal mask panel 40 for forming a plurality of horizontal mask holes 41 to focus the hot electrons in the horizontal direction, and the horizontal mask panel 40 sequentially on the horizontal mask panel 40. B / G / R mask panels 50, 60, 70 that are stacked and control the amount of focus of the B / G / R electron beam by each B / G / R mask hole 51, 61, 71 And a dot panel B / G / R phosphor 81 formed to emit light by the electron beam, and a front panel 90 formed on the phosphor panel 80 and serving as an image display surface. do.

Referring to FIG. 4, the heater pattern 21 is formed in an annular ring shape on the front surface of the hot electron emission panel 20, and these heater patterns 21 are electrically connected to each other by the rear electrode 22. In this case, the heater pattern 21 may be formed in another shape, for example, a square ring or a metal plate, or in another shape.

Referring to FIG. 5, the plurality of vertical mask holes 31 are continuously formed in the vertical direction of the vertical mask panel 30, and the vertical mask holes 31 adjacent to the vertical mask holes 31 are electrically connected. . In this case, an insulator is formed around the vertical mask hole 31 to prevent crosstalk with the adjacent mask hole 31.

Referring to FIG. 6, the plurality of horizontal mask holes 41 are continuously formed in the horizontal direction of the horizontal mask panel 40, and the vertical mask holes 41 adjacent to the horizontal mask holes 41 are electrically conductive. do. Similarly, an insulator is formed around the horizontal mask hole 41 to prevent cross talk with the adjacent mask hole 41.

Referring to FIG. 7, the B mask panel 50, the G mask panel 60, and the R mask panel 70 each have three mask holes, one of which is a B / G / R mask hole. It is used as (51) 61 (71).

FIG. 8 is a plan view showing a phosphor surface formed on the phosphor panel 80 of FIG. 3, and it can be seen that the phosphor 81 is formed in a dot type of B / G / R on the phosphor surface.

FIG. 9 is a plan view of each mask hole as described above, and includes vertical and horizontal mask holes 31 and 41 formed in the vertical and horizontal mask panels 30 and 40, and a B / G / R mask panel ( The B / G / R mask holes 51, 61, 71 formed in the 50, 60, 70 are stacked to correspond to each other with the same size, and the B / G / R mask holes 51, 61 are stacked. Each of 71 is formed in the same shape, and one of them is used as a mask hole.

10 is a cross-sectional view of the front panel color water tube, and FIG. 11 is a cross-sectional view showing a driving circuit of the front panel color water tube of the present invention.

Referring to FIG. 11, a driving apparatus of a front panel color receiver according to the present invention includes a vertical / horizontal sync signal detector 100 for detecting vertical and horizontal sync signals to be applied to a mask, and predetermined vertical and horizontal sync signals. A blanking signal generator 101 for generating a blanking signal for blanking within a section, a triangle wave generator 103 for generating a triangle wave according to the vertical / horizontal synchronization signal and a blanking signal, and the triangle wave generator 103 Applying a peak voltage or a cutoff voltage to the vertical and horizontal mask panels 30 and 40 according to an input signal output from the triangular wave generator 103 and a DC / DC converter 102 for supplying a stable DC voltage. The mask panel driver 104 is configured.

Referring to FIG. 12, the mask panel driver 104 may include the first and second PMOS transistors TR1 and TR3 having common drain / gate terminals connected to an input voltage supply line, and the PMOS transistors TR1 and TR3. And first and second NMOS transistors TR2 and TR4 connected to the source terminal.

In this case, the PMOS transistors TR1, TR3, and NMOS transistors TR2, TR4 are connected in series by the number of vertical and horizontal lines of the mask holes 31 and 41 formed in the vertical and horizontal mask panels 30 and 40. Is connected to.

Referring to the operation and effect of the front panel color receiving tube, the driving device and the driving method according to the present invention configured as described above are as follows.

First, when a predetermined voltage is applied to the back electrode 12 of the hot electron emission panel 20, hot electrons are emitted through the plurality of heater patterns 21. At this time, the annular heater pattern 21 increases the density of hot electrons and helps generate secondary electrons.

Next, the vertical / horizontal sync signal detector 100 detects vertical and horizontal sync signals to be applied to the vertical and horizontal mask panels.

Subsequently, the triangular wave generator 103 receives the vertical and horizontal synchronization signals and the blanking signal and outputs a triangular wave Vi as shown in FIG. 13. The triangle wave generator 103 determines the horizontal frequency f and the vertical frequency fv of the triangle wave Vi to be 1 / (Tb-Ta) and 1 / (Vb-Va), respectively. In this case, the triangular wave Vi corresponds to the driving voltages V1 and V2 of the vertical and horizontal mask panels 30 and 40.

When the input voltage reaches Va, the first and second PMOS transistors TR1 and TR3 and the first NMOS transistor TR2 of the mask panel driver 104 are turned on and the second NMOS transistor TR4 is turned off. The first vertical line V1 is activated by the driving voltage B +. Therefore, the hot electrons pass through only the mask hole 31 formed in the first vertical line V1.

When the input voltage reaches Vb, the first PMOS transistor TR1 of the mask panel driver 104 is turned off and the second PMOS transistor TR3, the first NMOS transistor TR2, and the second NMOS transistor TR4 are turned on. As a result, the second vertical line V2 is activated by the driving voltage B +. Therefore, the hot electrons pass through only the mask hole 31 formed in the second vertical line V2.

While repeating the above process, the same voltage is alternately applied to all columns of the vertical lines of the vertical mask panel 30, and the driving voltage is alternately applied to all columns of the horizontal lines of the horizontal mask panel 40 in the same manner. The vertical and horizontal lines corresponding to the selected cell are activated.

The electron beams focused through the mask holes 31 and 41 of the vertical and horizontal mask panels 30 and 40 are controlled through the B / G / R mask panels 50 and 60 and 70. Here, the B / G / R signals applied to the B / G / R mask panels 50, 60, and 70 respectively amplify the B, G, and R image signals provided through a personal computer (PC) to mask the corresponding masks. This is a signal applied to the panel.

In addition, the B / G / R signals are simultaneously applied to the B / G / R mask panels 50, 60 and 70 in the operation period T ₂ of one cell as shown in FIG. 14B.

Therefore, the electron beam simultaneously controlled through the B / G / R mask holes 51, 61 and 71 can display a predetermined image by exciting the B, G, and R phosphors of the phosphor panel 80.

As described in detail above, the front panel color receiving tube, the driving device and the driving method thereof according to the present invention have the following effects.

First, the present invention solves the problem of securing the deflection distance for the micro deflection in the unit screen method by the direct selection method of the display cells by the horizontal and vertical masks, and reduces the manufacturing cost of the front panel because the electron beam focus electrode is not required. have.

Second, in the present invention, since the B / G / R signals are simultaneously applied to the B / G / R mask panel in the operation cycle of one cell, the mislanding phenomenon due to the micro deflection of the conventional control electrode does not occur, and at least 3 Since there is more than twice the length of the syringe of the electron beam there is an advantage that can be implemented as a front panel color receiver having a high brightness and low power characteristics.

Therefore, according to the front panel color receiving tube, the driving device and the driving method thereof according to the present invention is expected to change for each mask according to the size and size of the product in the present invention within the scope without departing from the spirit of the present invention It is apparent that various modulation variations are possible without being limited to the embodiments presented.

Claims (12)

A plurality of heater patterns having a plurality of heater patterns formed thereon to emit hot electrons; A vertical mask panel in which a plurality of vertical mask holes are formed to focus the hot electrons in a vertical direction; A horizontal mask panel in which a plurality of horizontal mask holes are formed to focus the hot electrons in a horizontal direction; A B / G / R mask panel which is sequentially stacked on the horizontal mask panel and controls the amount of focus of the B / G / R electron beam by each B / G / R mask hole; A phosphor panel in which dot-shaped B / G / R phosphors are formed and emit light by the electron beams; And a front panel formed on the phosphor panel and including a front panel which is an image display surface. The front panel color receiver of claim 1, wherein the heater pattern is formed in a predetermined shape on a front surface of the hot electron emission panel and is electrically connected by a rear electrode. According to claim 2, The predetermined shape of the heater panel is a front panel collar water pipe, characterized in that formed of any one of the annular ring, square ring, metal plate. The number of front panel colors as claimed in claim 1, wherein the plurality of vertical mask holes are continuously formed in the vertical direction of the vertical mask panel, and the plurality of horizontal mask holes are formed in the horizontal direction of the horizontal mask panel. relation. The front panel color receiver of claim 1, wherein the mask holes formed in the vertical and horizontal mask panels and the mask holes formed in the B / G / R masks are formed to correspond to each other in the same size. The front panel color receiver of claim 1, wherein the B / G / R mask holes are formed in the same shape, and one of them is used as a mask hole. A horizontal / vertical sync signal detector for detecting horizontal and vertical sync signals to be applied to the mask; A blanking signal generator for generating a blanking signal for blanking within a predetermined period of the horizontal and vertical synchronization signals; A triangular wave generator for generating triangular waves in accordance with the horizontal / vertical synchronization signal and the blanking signal; A DC / DC converter for supplying a stable DC voltage to the triangle wave generator; And a mask panel driver configured to apply a peak voltage or a cutoff voltage to vertical and horizontal masks according to the voltage level output from the triangle wave generator. 8. The front panel of claim 7, wherein the mask panel driver comprises PMOS transistors having a common drain / gate terminal connected to an input voltage supply line, and NMOS transistors connected to source terminals of the PMOS transistors. Driving device of collar water pipe. 10. The apparatus of claim 8, wherein the PMOS transistor and the NMOS transistor are connected in series by the number of mask hole lines formed in the vertical and horizontal mask panels. In a front panel color receiving tube in which a hot electron emission panel, a vertical mask panel, a horizontal mask panel, a B / G / R mask panel, a phosphor panel and a front panel are sequentially stacked and bonded; Emitting hot electrons through a plurality of heater patterns formed on the hot electron emission panel; Focusing the emitted hot electrons through the vertical or horizontal mask hole selected according to a predetermined driving voltage; Controlling the electron beam focused by the vertical or horizontal mask through the B / G / R mask hole; And exciting the phosphor by an electron beam controlled through the B / G / R mask hole to display a predetermined image. 11. The method of claim 10, wherein the focusing of the hot electrons further comprises passing hot electrons through selected mask holes where holes of vertical or horizontal masks intersect. 12. The method of claim 11, further comprising selectively supplying one of a peak voltage and a cutoff voltage to a vertical or horizontal mask in the hot electron focusing step.