KR19990040641A - Mask stretching device and method for manufacturing flat brown tube - Google Patents

Abstract

The present invention relates to a manufacturing apparatus and a method for manufacturing a flat brown tube, in particular, by loading a transparent rubber plate on a system designed by initial analysis, clamping with a gripper, and then measuring the frictional resistance acting on each gripper while stretching the transparent rubber plate. And a second process of adjusting the frictional resistance acting on each gripper according to the measurement result of the first process to set the grippers to have the same frictional resistance and unloading the transparent rubber plate. A third process of loading and stretching the mask on the system, and measuring the frictional resistance applied to each gripper while stretching the mask, and inputting the measurement result as an analysis data to verify whether the mask is uniformly stretched. Mask stretching method for manufacturing flat CRT including 4 steps By providing a device which can hyeonhal verify the frictional resistance difference of the gripper, the mask error factor at the time of processing, such as error of the initial analysis, and is also able to compensate for this is that the mask is uniformly stretching.

Description

Mask stretching device and method for manufacturing flat CRT

The present invention relates to a manufacturing apparatus and a method for manufacturing a flat brown tube, and in particular, equalizes the magnitude of the frictional resistance applied to each gripper, and at the same time compares the initial analysis result with the result of the force acting on the data for the difference. The present invention relates to a mask stretching device and method for manufacturing a flat brown tube which can be reinterpreted by feeding back.

In general, a cathode ray tube (CRT) used in a TV receiver or a monitor is positioned on the front surface of the tube as shown in FIG. 1 and the panel 3 coated with the phosphor 1 on the inner side thereof. A line-shaped rail 5 mounted inside the panel 3 and a hole of a dot or stripe type laser-welded on the rail 5 to maintain a predetermined distance from the inside of the panel 3. A plurality of masks 10 are formed, a funnel provided at the rear of the tube, an electron gun provided at the rear of the funnel to scan an electron beam, and a deflection yoke provided to deflect the electron beam.

In the CRT configured as described above, when the electron beam is emitted from the electron gun, the electron beam passes through the hole of the mask 10 and then is applied to the inside of the panel 3 (R), green (G), and blue (B). It collides with the phosphor 1 to form a screen. That is, when the signals of three primary colors are independently applied to three electron beams, the screens of the three primary colors modulated by the fluorescent surface formed inside the panel 3 are synthesized, and the color screen is reproduced on the screen.

Here, about 80% of the electron beam emitted from the electron gun collides with the mask 10 and is reflected or absorbed. The electrical energy absorbed by the mask 10 is converted into thermal energy and the temperature of the mask 10 is increased. Done. Since the inside of the CRT is maintained in a high vacuum state, when the temperature of the mask 10 is increased, the mask 10 causes thermal expansion at a high speed. At this time, since the heat dissipation effect of the central portion of the mask 10 is lower than the peripheral portion, a temperature difference is generated between the central portion and the peripheral portion.

Therefore, a doming phenomenon occurs in which the central portion of the mask 10 expands toward the fluorescent surface, and the position of the holes on the mask 10 is changed due to the domming phenomenon, and an electron beam passing through the holes is preselected. A thermal drift phenomenon occurs in which a path is changed without reaching the phosphor 1 to reach another phosphor 1 position or to reach another phosphor 1 adjacent thereto.

In addition, when a minute vibration occurs in the mask 10 due to an impact outside the CRT, a howling phenomenon may occur in which a screen reproduced on the screen is shaken or distorted. This howling phenomenon occurs when the electron beam emitted from the electron gun passes through a hole formed in the mask 10 and is mislanded due to the vibration of the mask 10.

As described above, when a dominant phenomenon, a thermal drift phenomenon, a howling phenomenon, etc. occur, the quality of the screen is degraded and the performance of the CRT is degraded, which causes severe fatigue and dizziness in the eyes of the user. In order to prevent this, the mask 10 should be stretched to a reference tension of 14 N / Cm or more so that the mask 10 has a constant tension.

As shown in FIG. 2, the mask stretching apparatus according to the related art includes 36 grippers 13 which are disposed at 10 short sides at the long sides of the mask 10 to bite the mask 10, and the mask 10. And a power supply unit 15 for supplying power to stretch the power supply unit 15, a power transmission unit 19 for transmitting the power supplied from the power supply unit 15 to the gripper 13, and the system. It consists of a stretching die (not shown).

Here, the mask 10 is a mask effective surface so that the mask effective surface 10a actually used in the CRT and the mask effective surface 10a are uniformly stretched after laser welding on the rail 5 of the panel 3. It consists of an outer periphery (Stress relief zone, 10b) formed at the edge of (10a).

In addition, the gripper 13 is equipped with an adjustment screw for adjusting the frictional resistance of the gripper 13.

In addition, the power supply unit 15 is provided in each of the twelve motors 16 connected to the power transmission unit 19 and the motor 16 to be arranged on each side of the mask 10, the motor ( It consists of a ball screw box 17 for converting the rotational motion of 16) into a linear motion.

In addition, the power transmission unit 19 is composed of a combination of a plurality of power tree levers and the pins for coupling each of the power tree levers described above.

The conventional mask stretching device configured as described above operates as follows.

First, when the mask 10 is loaded onto the system, the gripper 13 advances and clamps the mask 10. When the mask 10 is clamped, the motor 16 is driven to transmit power of the motor 16 to the power transmission unit 19. At this time, the rotational motion of the motor 16 is converted into a linear motion by the ball screw box (17).

Thereafter, when the power transmission unit 19 received the power of the motor 16 is retracted, the gripper 13 is reversed, and accordingly, the mask 10 is stretched to the target hole 10c to apply a constant tension. Will receive.

Thereafter, as shown in FIG. 3, the rail 5 is mounted on the inner surface of the panel 3, and the mask 10 is fixed on the inner surface of the panel 3 by laser welding the mask 10 thereon. An exposure operation is performed through 10 to form a fluorescent surface on the inner surface of the panel 3.

However, in the conventional mask stretching apparatus as described above, the ratio of the force acting on the 36 grippers 13 according to the friction coefficient and the adjustment degree of the adjustment screw existing between the gripper 13 and the stretching die during the mask stretching is constant. Not only can not be adjusted, but also the force non-uniformity applied to each gripper 13 is due to a design error of the power transmission unit 19 made of a combination of the power tree lever and the pin or error occurring during subsequent operation. It is impossible to verify whether

Therefore, it is difficult to verify whether the mask 10 is stretched according to the analysis result because it is impossible to verify and compensate the frictional resistance acting on each gripper 13 described above, and it is difficult to verify that the frictional resistance of the gripper 13 is different. Due to the uniform stretching is not possible there is a problem that the doming and howling characteristics of the product is reduced.

In addition, since the analysis results cannot be verified after analyzing the mask 10, it is difficult to verify whether the analysis results according to the mask 10 manufacturing direction, etching degree, and heat treatment conditions of the mask 10 appearing in the analysis are correct or wrong. In addition, there is a problem that accurate correction is impossible when correcting the difference in physical properties according to the manufacturing method and the etching degree of the mask (10).

In addition, when correcting the master mask during close exposure, it is difficult to accurately correct the pixels, so that the pixels of the mask 10 and the panel 3 are evaluated when the performance is evaluated even if the compensation of the mast mask is repeated several times in the CRT manufacturing process. There is a problem that is not exactly matched.

In addition, when the mask 10 is stretched, the holes maintain the matrix form and whether the forces acting on the gripper 13 can not be confirmed whether or not properly distributed, there is a problem that the scattering problem occurs when manufacturing a number of equipment .

In addition, in the combination of the power lever tree and the pin, the difference in the frictional resistance acting on each gripper 13 is increased due to the direct contact between the power lever tree and the pin, thereby increasing the nonuniformity of the stretching of the mask 10. .

The present invention has been made to solve the above problems, while equalizing the magnitude of the frictional resistance acting on each gripper, and at the same time compares the results of the initial analysis and the actual force applied to the data for the difference By providing a structure that can be reinterpreted by feedback, it is possible to verify and compensate for the difference in frictional resistance of gripper, error factor in mask processing, and error of initial analysis, and to compensate for this. It is an object of the present invention to provide a mask stretching device and a method thereof.

1 is a configuration diagram showing the structure of a typical flat brown tube,

Figure 2 is a block diagram showing a mask stretching device for manufacturing flat brown tube according to the prior art,

3 is a coupling of the panel and the mask,

4 is a configuration diagram showing a case in which a transparent rubber plate is loaded on a mask stretching device for manufacturing a flat CRT according to the present invention;

5 is a configuration diagram illustrating a case where a mask is loaded in the mask stretching apparatus for manufacturing a flat CRT according to the present invention.

<Explanation of symbols for main parts of the drawings>

50: mask 51: gripper

53: load cell 55: power supply

59: power transmission unit 61: transparent rubber plate

According to a first aspect of the present invention for achieving the above object, by loading a rubber sheet on a system designed by the initial analysis, clamping with a gripper, and then measuring the frictional resistance acting on each gripper while stretching the transparent rubber sheet. And a second process of adjusting the frictional resistance acting on each gripper according to the measurement result of the first process to set the grippers to have the same frictional resistance and unloading the transparent rubber plate. A third process of loading and stretching the mask on the system, and measuring the frictional resistance applied to each gripper while stretching the mask, and inputting the measurement result as an analysis data to verify whether the mask is uniformly stretched. Mask stretching room for manufacturing flat CRT, characterized in that it comprises a four-step process It is provided.

According to a second aspect of the present invention, a gripper for biting and fixing a mask, a power supply unit disposed at each side of the mask to supply power for stretching the mask, and power provided from the power supply unit may be used as the gripper. In the mask stretching apparatus for manufacturing a planar brown tube composed of a power transmission unit for transmitting and a support unit for supporting the system, load cells are installed in the grippers so as to measure frictional resistance applied to the respective grippers. Provided is a mask stretching device for producing a flat brown tube.

In addition, according to a third aspect of the present invention, the power transmission unit includes a plurality of power tree levers, a pin for fastening the power tree levers to each other, and a pin to minimize frictional resistance between the power tree lever and the pins. Consists of an inserted bearing.

According to the present invention configured as described above, the frictional resistance acting on the 36 grippers can be uniformly adjusted, and at the same time, the error factor is found after comparing the result of the force actually acting on the gripper with the initial analysis result when the mask is stretched. By re-analyzing the mask by feeding back the results of the initial analysis, the doming and howling properties of the product are improved, and accurate correction of the difference in the physical properties of the mask according to the mask manufacturing method and the degree of etching is possible. The correction design of the mask is minimized, so that the quality and yield of the product are improved.

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

4 is a configuration diagram showing a case in which a transparent rubber plate is loaded in the mask stretching apparatus for manufacturing flat brown tube according to the present invention, Figure 5 is a configuration diagram showing a case in which a mask is loaded in a mask stretching apparatus for manufacturing a flat brown tube according to the present invention. to be.

As shown in FIGS. 4 and 5, the mask stretching device for manufacturing a flat brown tube according to the present invention has 36 grippers 51 disposed on the long sides of the mask 50 and 8 on 10 short sides. And a load cell 53 installed in each of the grippers 51 and a power supply unit for supplying power to stretch the mask 50 so as to measure the frictional resistance applied to the respective grippers 51. 55, a power transmission unit 59 for transmitting power provided from the power supply unit 55 to the gripper 51, and a stretching die (not shown) for supporting the system.

Here, the mask 50 is laser-welded on the rail of the panel, and then the mask effective surface 50a actually used in the CRT and the edge of the mask effective surface 50a so as to uniformly stretch the mask effective surface 50a. It is formed of a stress relief zone (50b) formed.

In addition, the power supply unit 55 is provided with twelve motors 56 connected to the power transmission unit 59 and three motors 56 to be disposed on each side of the mask 50, respectively. It consists of a ball screw box 57 for converting the rotational motion of 56 to a linear motion.

In addition, the power transmission unit 59 is composed of a plurality of power tree lever, a pin for fastening the power tree lever to each other, and a bearing inserted into the pin to minimize the frictional resistance between the power tree lever and the pin. do.

In addition, the gripper 51 is provided with an adjustment screw for adjusting the frictional resistance of the gripper 51, the load cell 53 is connected to the power tree lever by a pin.

Operation of the mask stretching device for manufacturing a flat CRT according to the present invention configured as described above is as follows.

First, the transparent rubber plate 61 is loaded on the system designed by the initial analysis, clamped with the gripper 51, and then acted on each gripper 51 using the load cell 53 while stretching the transparent rubber plate 61. Measure the frictional resistance. At this time, the transparent rubber plate 61 is about 0.5 mm thick.

Subsequently, according to the result measured by the load cell 53, the frictional resistance acting on each gripper 51 is adjusted by adjusting screws to set the grippers 51 to have the same frictional resistance with each other. As described above, when the grippers 51 have the same frictional resistance, the transparent rubber plate 61 is unloaded and the mask 50 is loaded on the system.

Subsequently, the force applied to each gripper 51 is measured using the load cell 53 while the mask 50 is stretched beyond the reference tension, and the measurement result is input again as analytical data to detect the mask 50. Verify that is uniformly stretched.

In the above, the stretching of the mask 50 will be described in more detail as follows.

First, when the mask 50 is loaded onto the system, the gripper 51 advances to clamp the mask 50. When the mask 50 is clamped, the motor 56 is driven to transmit the power of the motor 56 to the power transmission unit 59. At this time, the rotational motion of the motor 56 is converted into a linear motion by the ball screw box (57).

Subsequently, when the power transmission unit 59 received the power of the motor 56 is reversed, the gripper 51 is reversed, and accordingly, the mask 50 is stretched to the target hole 50c to apply a constant tension. Will receive.

Subsequently, the rail is mounted on the inner surface of the panel, and the mask 50 is welded on the inner surface of the panel to fix the mask 50 to the inside of the panel, and then the exposure operation is performed through the mask 50 in the panel. A fluorescent surface is formed on the side.

The mask stretching device and method for manufacturing a planar brown tube according to the present invention constructed and operated as described above can uniformly adjust the frictional resistance acting on the 36 grippers 51 using the transparent rubber plate 61 and the load cell 53. In addition, since the uniform friction resistance as described above can be kept constant, there is an advantage that uniformity is ensured when the mask 50 is stretched.

In addition, the present invention compares the result of the force actually acting on the gripper 51 when the mask 50 is stretched to find an error factor and then feeds the error factor back to the initial analysis result to the mask 50. By reinterpreting), the doming and howling characteristics of the product are improved, and accurate correction of the difference in physical properties of the mask 50 according to the manufacturing method and the degree of etching of the mask 50 can be performed. Minimization has the advantage of improving product quality and yield.

In addition, the present invention can determine whether the force is properly distributed to the respective grippers 51 by the load cell 53, so that scattering between products is removed during the production of several equipment, and the gripper 51 is a mask 50. Since it is possible to know whether slip occurs after clamping, there is an advantage of preventing product defects.

In addition, in the present invention, the bearing is installed on the pin in the combination of the power lever tree and the pin to generate a force in the vertical direction with respect to the mask 50 and minimize the frictional resistance acting on each gripper 51 to minimize the mask 50. ) Is uniformly stretched without tearing.

Claims (3)

The first step of measuring the frictional resistance acting on each gripper while the transparent rubber plate is loaded and clamped with a gripper on the system designed by the initial analysis, and the stretching according to the measurement results of the first process, respectively. A second process of adjusting the frictional resistance acting on the gripper to set the grippers to have the same frictional resistance, a third process of unloading the transparent rubber plate, and then loading and stretching the mask onto a system; And a fourth step of verifying whether the mask is uniformly stretched by measuring the frictional resistance acting on each gripper while stretching and inputting the result of the measurement as an analysis data. . A gripper for biting and fixing a mask, a power supply unit disposed at each side of the mask to supply power to stretch the mask, a power transmission unit for transmitting power provided from the power supply unit to the gripper, and the system. In the mask stretching device for manufacturing a planar brown tube composed of a supporting portion, And a load cell is installed on each of the grippers so as to measure the frictional resistance applied to the respective grippers. The method of claim 2, The power transmission unit includes a plurality of power tree levers, a pin that fastens the power tree levers to each other, and a flat brown tube, characterized in that the bearing is inserted into the pin to minimize the frictional resistance between the power tree lever and the pins Mask stretching device for manufacturing.