KR100470340B1 - Digital Cathode Ray Tube - Google Patents

Abstract

The digital CRT according to the present invention for achieving the above object is an electron gun for firing R, G, B three-color electron beam, a deflection yoke for deflecting the electron beam emitted from the electron gun, and assist the position of the deflected electron beam A panel glass having an auxiliary deflection means for adjusting and a screen coated with phosphor, a funnel glass bonded to the back of the panel glass to maintain an internal vacuum state, and to hold a mechanical position of the deflection yoke and the electron gun; A deflection circuit for applying a signal necessary for the auxiliary deflection means or the deflection yoke, and a memory means for storing the adjustment data and applying the signal to the deflection circuit, wherein the axial angle of the electron gun before the deflection of the three electron beams is at least zero; It is composed of up to 0.5 degrees in the figure and the phosphor of the screen is perpendicular to the arrangement of the electron gun electron beam. It characterized in that it is a coating.

According to the present invention, the deflection yoke can be arranged closer to the electron beam, thereby optimizing design, minimizing power consumption used for emitting light, maximizing focus performance of the electron gun, and minimizing deviation between electron beams. In addition, it is possible to ensure the uniformity of focus during operation, and to maximize the performance of the electron gun and the performance of the deflection yoke, it is possible to manufacture an ultra-wide angle tube of 130 degrees or more.

Description

Digital Cat Tube {Digital Cathode Ray Tube}

The present invention relates to a CRT tube having a structure suitable for processing a digital signal. In particular, the R, G, and B three-color beams of the electron gun can be designed to have little or no inclination to minimize beam distortion due to deflection. The present invention relates to a digital CRT having a structure capable of color reproduction without a separate color selection electrode.

1 is a schematic cross-sectional view showing the structure of a conventional color CRT.

As shown in the figure, the conventional display element, the cathode ray tube 1, has an electron gun 2 for generating an electron beam and a deflection yoke for deflecting the electron beam emitted from the electron gun 2 to a desired point on the screen 3. (4) and a color selection electrode or shadow mask 5 provided with a hole at a predetermined position so that colors can be selected by using a difference in incidence angle of each electron beam sent to the position determined by the deflection yoke 4; In addition, a panel 6 constituting a screen 6 on which the phosphor 6 serves to receive kinetic energy of the electron beam filtered by the shadow mask 5 and convert the kinetic energy into light energy. 7) together with the panel glass 7 to create a vacuum space in which the electron beam can freely move the space, and mechanically provide a space for the electron gun 2, the deflection yoke 4, etc. to be installed. It is composed of a funnel glass (8) or the like for installation.

Referring to the operation of the conventional color CRT composed of the above configuration is as follows.

As shown in FIG. 2 to FIG. 3, the conventional color CRT 1 is an outer beam for red and blue, which is an outer beam which is fired with a constant inclination toward the screen from the center when the electron beam is emitted from the electron gun 2, And basically it emits a green electron beam that is emitted vertically without inclination, and receives a color signal of the screen and emits a predetermined color signal electron beam at a predetermined point, the screen is a shadow mask that is an electron beam coming from different angles When passing through the hole made at the predetermined position of (5), different phosphors 6 were applied to the beam position separated by the angle and reached the screen 3, so that the electron beam collided to emit light.

At different positions of the screen, there is a difference in the distance that the electron beams pass through the holes, and thus, there is a case that a certain level of color cannot be obtained throughout the screen. In order to design well the space | interval of the fluorescent substance 6 of (), or to adjust the space | interval of the screen 3 and the shadow mask 5, etc. are used.

Alternatively, as shown in FIGS. 4 to 5, the electron beam emitted from the electron gun 2 strikes the phosphor 6 applied to the screen 3 to emit light in a manner of reproducing the color hue. A beam index CRT (10) which recognizes a signal of light using a sensor (9) separately installed inside the CRT (1), and adjusts its position by feeding back the deflection yoke (4) for information on the error. There is).

Also, although similar to the above method, as shown in FIG. 6, the recognition method is different, that is, the conductor 11 is applied on the screen 3 to recognize the position of the beam through the conductor and the position thereof. There is a position tracking brown tube 13 which feeds back to the circuit feedback device 12 to adjust the deflection position of the beam.

The conventional color CRT as described above basically uses only 20% of electrons of the electron beam sent from the electron gun 2 by using the shadow mask 5, which is a color screening electrode, for color screening. At the same time, it is a condition that is absolutely used in this color sorting system, and the angle of incidence of each electron beam of the electron gun 2 is different from that of the general CRT tube 1 in order to satisfy the on-screen performance in the deflection system. When using the self-convergence deflection yoke 4, a non-uniform magnetic field must be set.

In addition, in order to realize wide-angle deflection, a stronger non-uniform magnetic field must be set, and thus, a good screen characteristic is obtained such that the shape of the electron beam experiencing a strong non-uniform magnetic field is very distorted. I have a difficulty.

In addition, in the case of the electric beam index CRT 10, the monogun 21 is generally used. In this case, in order to realize a color, a high frequency operating condition of three times higher than that of the existing one must be applied, and a separate optical Difficult conditions such as a circuit implementation problem such as the need to use the feedback circuit 12 using the sensor 9 and the increase in the cost thereof have not yet been realized.

In addition, even in the case of the position tracking CRT (13), even when the deflection angle is about 110 degrees, the beam size in the left and right directions is too large because the deflection angle is about 110 degrees. There is a problem that it is difficult to obtain an appropriate level of screen characteristics.

The present invention has been proposed to solve the above problems, and an object of the present invention is to design a beam of three colors of R, G, B of the electron gun with little or no inclination to minimize beam distortion due to deflection. At the same time, the objective is to provide a digital CRT that enables color reproduction without a separate color selection electrode.

1 is a schematic cross-sectional view showing the structure of a conventional color CRT.

Figure 2 is a detailed view showing the operating state of the color selection electrode of a conventional color CRT.

3 is a schematic view showing an inclination and a simple structure of an electron beam of a conventional color CRT.

4 is a schematic cross-sectional view showing the structure of a conventional beam index CRT.

5 is a schematic view showing an operation state of a conventional beam index CRT.

6 is a schematic view showing an operation state of a conventional position tracking CRT.

7 is a schematic cross-sectional view showing the structure of a digital CRT according to the present invention.

8 is a detailed view showing the operating state of the electron gun of the digital CRT according to the present invention.

9 is a schematic view showing an operating state of the digital CRT according to the present invention.

10 is a schematic diagram showing an example of data for memory of a digital CRT according to the present invention.

Figure 11 is a schematic diagram showing the operation state of the electron gun of the digital CRT and the conventional CRT according to the present invention.

12 is a schematic view showing another embodiment of a digital CRT according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: color CRT 2: color CRT

3: screen 4: deflection yoke

5: shadow mask 6: phosphor

7: Panel Glass 8: Funnel Glass

9: beam index tube optical sensor 10: beam index tube

11: Conductor for position tracking 12: Feedback circuit

13: Position tracking CRT 14: Digital CRT

15: auxiliary deflection means 16: deflection circuit

17: memory means 21: mono electron gun for beam index tube

22: Digital gun tube gun

The digital CRT according to the present invention for achieving the above object is an electron gun for firing R, G, B three-color electron beam, a deflection yoke for deflecting the electron beam emitted from the electron gun, and assist the position of the deflected electron beam A panel glass having an auxiliary deflection means for adjusting and a screen coated with phosphor, a funnel glass bonded to the back of the panel glass to maintain an internal vacuum state, and to hold a mechanical position of the deflection yoke and the electron gun; A deflection circuit for applying a signal necessary for the auxiliary deflection means or the deflection yoke, and a memory means for storing the adjustment data and applying the signal to the deflection circuit;

The axial angle of the electron beam traveling direction before deflection of the three electron beams of the electron gun is configured within a minimum of 0 degrees and a maximum of 0.5 degrees, and the phosphor of the screen is applied parallel to the array of the electron gun electron beams at right angles.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 7 is a schematic cross-sectional view showing the structure of the digital CRT according to the present invention, Figure 8 is a detailed view showing the operating state of the electron gun of the digital CRT according to the present invention, Figure 9 is a working state of the digital CRT according to the present invention 10 is a schematic diagram showing an example of data for memory of a digital CRT according to the present invention, and FIG. 11 is a schematic diagram showing an electron gun operating state of a digital CRT and a conventional CRT according to the present invention. 12 is a schematic view showing another embodiment of a digital CRT according to the present invention.

As shown in the figure, the digital CRT according to the present invention deflects the electron gun 22 and the electron beam emitted from the electron gun 22 so that the inclination of the outer electron beam is in the range of at least 0 degrees and at most 0.5 degrees. A phosphor 6 having a deflection yoke 4 and an auxiliary deflection means 15 which auxiliaryly adjusts the position of the deflected electron beam and formed perpendicular to the direction of arrangement of the electron beam arranged in the electron gun 22. A panel glass 7 having a coated screen 3 and a panel glass 7 are connected to the panel glass 7 to hold the mechanical positions of the deflection yoke 4 and the electron gun 22, and the electron beam can operate therein. A deflection circuit by storing a funnel glass 8 which serves to maintain a vacuum state, a deflection circuit 16 for applying a signal to the auxiliary deflection means 15 or a deflection yoke 4, and adjustment data. (16 Memory means 17 for applying a signal to

If the description of the operation of the present invention made of the above configuration is as follows.

The digital CRT 14 of the present invention operates in such a manner that the angle range of the outer electron beam excluding the center electron beam of the electron gun 22 is within 0.5 degrees to 0 degrees so that the predetermined electron beam strikes the color of the predetermined phosphor and emits light.

For example, when operating in the center of the screen (3) When the upper side of the vertically configured electron gun 22 is set to the red electron beam and the center is set to the green electron beam, the lower side to the blue electron beam screen (3) R, G, and B phosphors 6 are applied in parallel in the horizontal direction of the same vertical position on the top. Basically, the characteristics of the deflecting device 4 are identified and a method is applied using the electron gun. The electron beam emitted at 22 strikes the phosphors of R, G, and B as they are and emits light.

Of course, in this case, between the phosphors 6 of R, G, and B, a black band capable of absorbing light as a means for distinguishing colors, absorbing the scattering by the shape and manufacture of the electron beam, and compensating for the contrast of colors, I installed the structure of the black matrix.

In the case of using the phosphor 6 having a normal luminous efficiency, the same brightness can be obtained with a beam current of about 20% by not using the shadow mask 5, which is a color selection electrode, so that the typical size of the circular electron beam is Unlike the conventional electron gun (2), which is about 2mm in length, even if the electron beams are arranged side by side vertically, even if the distance is 0.4mm or about 0.6mm in consideration of the repulsive force of the electron beam, the long direction of the electron beams arranged in a line The length is about 1.6mm can be configured.

Of course, in the case of a television receiving tube, if the screen is formed with a distance of 0.7mm ~ 0.9mm, which is the distance between ordinary phosphors, a beam size of about 200㎛ should be made, and in the case of a monitor receiving tube, if a phosphor spacing of 0.25mm is made, A beam size of about 50 μm should be formed.

This value is made smaller than the size of the monochromatic electron beam of the conventional electron gun 2, and when the deflection is made by using the arrayed electron gun 22, the initial vector values of the individual electron beams do not have the same difference in the direction of travel. Since there is only a difference in position, it is not necessary to form a magnetic field for misconvergence, but only a raster distortion, that is, a magnetic field for the linear straightness.

However, it is very difficult for the deflection yoke 4 to make the arrangement level of the phosphor 6 applied on the screen 3 in the case of raster distortion.

Therefore, as shown in FIG. 10, the position difference dX, dY between the point where the phosphor 6 is applied and the point where the light is actually deflected and reaches the screen 3 is measured in the manufacturing process, and the value of the auxiliary deflector is measured. (15) or the deflection yoke 4 is reflected, and the above-described memory means 17 is used as a device for storing the difference value.

As a method of reflecting, a method of adjusting the value of the current applied to the deflection yoke 4 and a method of modifying the initial position of the electron beam using the auxiliary deflector 15 may be used.

In one embodiment according to the present invention, when the electron beam is emitted from the electron gun 22 at the center of the screen 3, the arrangement state of the phosphor 6 on the screen 3 and the arrival state of the electron beam may be different. In this case, the electromagnet can be installed between the electron gun 3 or between the electron gun 3 and the deflection yoke 4 as a way to compensate for this.

In addition, as shown in FIG. 10, a predetermined portion of the screen, for example, 25 values is identified as a method of compensating for the positional difference between the phosphor 6 of the screen 3 and the deflected electron beam, and the value therebetween. By using the analogy method by calculation, the space of the memory element 18 to be used can be minimized.

As shown in FIG. 8, when the electron beam is emitted from the electron gun 22 at the center of the screen 3, the interval of the starting point of the electron beam may be adjusted due to mechanical or physical reasons of the electron gun 22. If it is not equal to the interval between the phosphors 6), the landing should be adjusted by giving an external beam tilt of less than 0.5 degrees. In this case, the landing may be adjusted using an electromagnet.

In addition, the arrangement of the phosphor 6 on the screen 3 and the arrangement of the electron beams of the electron gun 22 may be made in the same direction, and the initial position change of each electron beam may be performed externally or inside the electron gun 22 for color separation. .

As shown in FIG. 12, three or more electron beams may be used in the electron gun 22 to densify the arrangement of the phosphor 6 on the screen.

The present invention as described above has the following effects.

First, as the installation space of the electron gun can be minimized by narrowing the spacing of the electron beam, the deflection yoke can be arranged closer to the electron beam, and according to the design optimization, the power consumption of the deflection can be reduced by 50% or more.

Second, since the power consumption used for light emission can be minimized by not using the shadow mask which is a separate color selection electrode, the light emission power consumption is reduced by more than 80%.

Third, it is possible to drive the electron gun with only 20% of the current level and not use a separate non-uniform magnetic field for miss convergence, thereby maximizing the focusing performance of the electron gun and making an ultra-high resolution CRT tube.

Fourth, as the spacing of the electron beams can be minimized, the deviation between the electron beams can be minimized, thereby ensuring focus uniformity during operation, thereby making a high quality CRT tube.

Fifth, it is possible to maximize the performance of the electron gun and the performance of the deflection yoke, it is possible to manufacture an ultra-wide angle tube of more than 130 degrees.

Claims (12)

An electron gun that emits electron beams for R, G, and B, A deflection yoke for deflecting the electron beam emitted from the electron gun; A panel glass having auxiliary deflection means for assisting in adjusting the position of the deflected electron beam and a screen coated with phosphors; Funnel glass bonded to the back of the panel glass to maintain the internal vacuum state, and to hold the mechanical position of the deflection yoke and electron gun, A deflection circuit for applying a signal necessary for the auxiliary deflection means or the deflection yoke, and memory means for storing signals for adjustment and applying a signal to the deflection circuit; A digital CRT tube, characterized in that the axial angle of the traveling direction of the outer electron beam of the three electron beams of the electron gun is 0.5 degrees or less. The method of claim 1, The phosphor of the screen is a digital CRT tube, characterized in that the side of the electron gun and the electron beam arranged in parallel to the right angle. The method of claim 1, And said deflection yoke is configured to form a uniform magnetic field. The method of claim 1, Digital CRT tube, characterized in that the distance between each electron beam at the position of the main lens of the electron gun within 1.5mm. The method of claim 1, And each electron beam of the electron gun is aligned in a row in a horizontal or vertical direction. The method of claim 2, When the electron beam of the electron gun is arranged in the lateral direction, the fluorescent tube of the screen is arranged in the longitudinal direction, characterized in that the digital CRT. The method of claim 2, When the electron beam of the electron gun is arranged in the longitudinal direction, the fluorescent tube of the screen is arranged in the transverse direction, characterized in that the digital CRT. The method of claim 1, And a secondary deflecting device capable of partially deflecting the electron beam in the horizontal or vertical direction in addition to the deflection yoke, so that the position of the electron beam can be adjusted. The method of claim 8, And a memory element for controlling a signal entering the auxiliary deflector. The method of claim 9, And the memory element stores a difference value between the position data of the deflected electron beam and the predetermined position data on the screen, or stores and reuses data using the value. An electron gun that emits electron beams for R, G, and B, A deflection yoke for deflecting the electron beam emitted from the electron gun; A panel glass having auxiliary deflection means for assisting in adjusting the position of the deflected electron beam and a screen coated with phosphors; Funnel glass bonded to the back of the panel glass to maintain the internal vacuum state, and to hold the mechanical position of the deflection yoke and electron gun, It includes a deflection circuit for applying a signal required for the auxiliary deflection means or the deflection yoke, And the three electron beams incident on the fluorescent surface proceed substantially in parallel, wherein the deflection magnetic field is a uniform magnetic field. The method of claim 11, And said deflection yoke comprises memory means for storing signals for adjustment and applying a signal to said deflection circuit.