JPH01134832A - Manufacture of screen - Google Patents

Abstract

PURPOSE:To enhance productivity and accomplish cost-down by providing a red, a green, and a blue exposure original version with respective pattern ID marks when a screen is manufactured, with which a plurality of lines can be indicated and TV image displayed, and thereby enabling ocular inspection of the position and also automatic identification. CONSTITUTION:One surface of a cleaned transparent glass plate is roughed, flushed, and coated with a thin resin film of photo-sensitive agent, and over this film a stripe forming resin film is formed which contains photo-sensitive agent. Then light exposure is made to remove resin film in areas other than exposed parts, and the carbon coated on the formed semi-transparent film is removed by etching, followed by development and drying. When exposure of fluorescent substance is made thereafter, consideration is given to the flat plate form of this screen, and a pattern identifying circle 41, a pattern identifying triangle 42, and a pattern identifying square 43 are formed, which correspond to a red, a green, and a blue fluorescent substance 36, 37, 38, respectively, on the light exposure original version 44. These circle 41, triangle 42, and square 43 enables ocular inspection of the position of fluorescent substance and also automatic identification.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention generates an electron beam for each division when a screen on a screen is vertically divided into a plurality of divisions, and generates an electron beam for each division. The present invention relates to a method for manufacturing a screen in a device that displays a plurality of lines by vertically deflecting a beam to display a television image as a whole.

Conventional technology Traditionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes have a very long depth compared to the screen size, making it difficult to use in thin television receivers. It was impossible to create. In addition, although EL display elements, plasma display devices, liquid crystal display elements, etc. have recently been developed as flat display elements, all of them are insufficient in terms of performance such as brightness, contrast, and color display, and are not suitable for practical use. It has not yet reached the point where it has been standardized.

Therefore, in order to achieve a flat display device using electron beams, the present applicant proposed a new display device in Japanese Patent Application No. 66-20618 (Japanese Unexamined Patent Publication No. 57-135590).

This method generates an electron beam for each section when the screen is vertically divided into multiple sections, and deflects each electron beam vertically for each section to create multiple lines. , and displays the television image as a whole.

First, a basic configuration of the image display element used here will be explained with reference to FIG. 2. This display element consists of, in order from the back to the front, a back electrode 1°, a line cathode 2 as a beam source, and a line cathode 2 as a beam source. Vertical focusing electrode 3°3', vertical deflection electrode 4. Beam current control electrode5. Horizontal focusing electrode 6. Horizontal deflection electrode7. A beam accelerating electrode 8 and a screen 9 are arranged, and these are housed in the evacuated interior of a flat glass pulp (not shown). A line cathode 2 as a beam source is stretched horizontally so as to generate an electron beam distributed linearly in the horizontal direction, and a plurality of line cathodes 2 are arranged vertically at appropriate intervals. (2a in the figure)
~2d only four are shown). In this example, it is assumed that 16 are provided. 2a~
Set it to 2o.

These wire cathodes 2 are constructed by coating the surface of a tungsten wire with a diameter of 10 to 20 μΦ with an oxide cathode material for thermionic emission. And these line cathodes 2a-2
The wire cathode 2a is heated so that it can generate an #I electron beam whenever a current is applied thereto, and as described later, it is controlled to emit an electron beam sequentially from the line cathode 2a for a fixed period of time. The back electrode 1 suppresses generation of electron beams from line cathodes other than the line cathode controlled to emit electron beams for a certain period of time, and pushes out the generated electron beams only in the forward direction. act. This back electrode 1 may be formed by a coating of electrically conductive material applied to the inner surface of the back wall of the glass pulp. Furthermore, a planar electron beam emitting cathode may be used in place of the back electrode 1 and the line cathode 2.

The vertical focusing electrode 3 is a conductive plate 11 having a horizontally long slit 1o facing each of the line cathodes 2a to 2o, and takes out the electron beam emitted from the line cathode 2 through the slit 1o, and directs it vertically Focus.

Electron beams for one horizontal line (360 pixels) are taken out at the same time.

In the figure, only one section in the horizontal direction is shown. The slit 10 may be provided with crosspieces at appropriate intervals in the middle, or it may be a row of through holes provided in large numbers at small intervals in the horizontal direction (intervals that are almost touching each other). It may also be configured as a slit.

The vertical focusing electrode 3' is also similar.

A plurality of vertical deflection electrodes 4 are arranged horizontally at intermediate positions of the slits 10, and conductors 13 and 13' are provided on the upper and lower surfaces of the insulating substrate 12, respectively. It is configured. Then, a vertical deflection voltage is applied between the opposing conductors 13 and 13',
Deflect the electron beam vertically. In this embodiment, the electron beam from one line cathode 2 is vertically deflected to a position corresponding to 16 lines by a pair of conductors 13, 13'. The 16 vertical deflection electrodes 4 constitute 16 pairs of conductors corresponding to each of the 16 green shades wi2, and in the end, the electron beam is emitted so as to draw 240 horizontal lines on the screen e. deflect.

Next, the control electrodes 5 are composed of conductive plates 15 each having a length slit 14 in the vertical direction, and a plurality of control electrodes 15 are arranged in parallel in the horizontal direction at predetermined intervals. In this example 1
Eighty control electrode conductive plates 15-1 to 15-n are provided (only nine are shown in the figure). Each of the control electrodes 5 extracts the electron beam horizontally by dividing it into two picture elements each, and controls the amount of electron beam passing therethrough in accordance with a video signal for displaying each picture element. Therefore, if 18,080 conductive plates 16-1 to 16-n for the control electrode 6 are provided, 936 pixels per horizontal line can be displayed. In addition, in order to display images in color, each picture element is R
, G, and H, and video signals of R, G, and B for two picture elements are sequentially applied to each control electrode 5.

In addition, 180 control electrode conductive plates 15-1 to 15-
180 sets of video signals for one line (two picture elements per set) are simultaneously applied to each of n, and the video for one line is displayed at one time.

The horizontal focusing electrode 6 is composed of a conductive plate 17 having a plurality of 180 vertically long slits 16 facing the slits 14 of the control electrode 6, and focuses the electron beam for each pixel divided in the horizontal direction. Each is focused horizontally into a narrow electron beam.

The horizontal deflection electrodes 7 include a plurality of conductive plates 18.1 arranged vertically on both sides of the slit 16.
Six levels of horizontal deflection voltage are applied to each electrode 18 and 18' to horizontally deflect the electron beam for each pixel, and two sets of electron beams are displayed on the screen 9. R,G.

Each phosphor of B is sequentially irradiated to emit light. In this embodiment, the deflection range is two picture elements wide for each electron beam.

The acceleration electrode 8 is composed of a plurality of conductive plates 19 provided horizontally at the same position as the vertical deflection electrode 4.
The electron beam is accelerated to collide with the screen 9 with sufficient energy.

The screen 9 is constructed by applying a phosphor 2o emitted by electron beam irradiation to the back surface of a flat glass plate 21, and adding a metal back layer (not shown). The phosphors 20 are provided with two pairs of phosphors of three colors R, G, and H for each slit 14 of the control electrode 5, that is, for each horizontally divided electron beam. It is applied vertically in stripes. In FIG. 2, the broken lines drawn on the screen 9 indicate divisions in the vertical direction that are displayed corresponding to each of the plurality of line cathodes 2, and the two-dot chain lines correspond to each of the plurality of control electrodes 6. Indicates the horizontal division displayed.

As shown in the enlarged view in Figure 3, one section partitioned by these two has R, G, and B phosphors 20 for two picture elements in the horizontal direction, and 16 lines in the vertical direction. It has a width of The size of one section is, for example, 10 in the horizontal direction and 9'IrII in the vertical direction.

Note that in FIG. 2, the length in the horizontal direction is greatly expanded relative to the vertical direction in order to make it easier to see.

In addition, in this example, only one pair of R, G, and B phosphors 20 for two picture elements are provided for one control room Wi5, that is, for one electron beam, but of course, one picture element Alternatively, three or more picture elements may be provided, in which case the control electrode 6 has R, G,
A B video signal is sequentially applied, and horizontal deflection is performed in synchronization with the B video signal.

In such an image display element, the screen 9 has conventionally been manufactured by the following steps. First, the transparent glass plate 31 is cleaned using a neutral detergent or the like. Thereafter, the surface to which the phosphor is applied is cleaned with hydrofluoric acid to roughen the surface. After washing with pure water, Figure 4 (5)
As shown in FIG. 2, a thin resin film 32 is formed on the roughened surface of a glass plate 31 by a slurry method. As this resin, P
VA (polyvinyl alcohol, etc.) can be used. Next, as shown in FIG. 3, a photosensitive resin film 33 for forming stripes is formed on this resin film 32 by a slurry method. This resin includes PVA, potassium dichromate, and the like. Then, exposure is performed using a mask, and the resin film 33 other than the exposed portions is washed off. After that, stripes 34 are formed at regular intervals as shown in FIG. 3(C). Next, carbon 35 is applied to the entire surface and dried. This state is shown in the same figure (D). Then, etching is performed using hydrogen peroxide to peel off the carbon 35 coated on the stripes 34. Next, development is performed to clarify the black stripes formed by carbon 35.

Let it dry in this state. This state is shown in FIG. 5 (5).

Then, red, green, and blue phosphors are sequentially applied.

First, red phosphor 36 is applied to the entire surface by a slurry method and dried. Next, the area where the red phosphor 36 is originally applied (see FIG. 3) is exposed. Then, by developing with a hot water shower, the red phosphor in other parts except for the part where the red phosphor 36 is originally applied is washed off. Then, it is dried to complete the formation of the red phosphor 36.

This state is shown in (■) in the same figure. Next, a green phosphor 37 is formed through a process similar to that for forming the red phosphor 36. Finally, the blue phosphor 38 is formed by the same process as the red phosphor 36. The states of each are shown in the same figure (G) and (
H).

Then, in the subsequent process, a water-retaining treatment is applied to prevent the lacquer and aluminum from entering the phosphor 36, 37, 38, and the lacquer 39 is applied and dried (Figure (I)), after which the aluminum 4° is removed under vacuum. evaporation ((I) in the same figure). With this, the formation of the screen 9 is completed.

Problems to be Solved by the Invention However, in the conventional manufacturing method described above, each of the red, green, and blue phosphors is exposed to light using a microscope to visually locate the insertion position of each color phosphor. .

Since accurate alignment is required for each of the green and blue phosphor stripes, there are problems in that productivity is poor and quality and cost are disadvantageous.

In view of the above problems, the present invention streamlines the manufacturing process.

The purpose of this invention is to provide a screen manufacturing method that reduces costs and stabilizes quality.

Means for Solving the Problems In order to achieve the above object, the screen manufacturing method of the present invention focuses on the fact that the screen is flat, and includes a first step of roughening one surface of the glass, and a first step of roughening one surface of the glass. a second step of forming a resin film for forming stripes for photosensitive piercing on one surface of the planarized glass plate; and a third step of exposing the resin film to light and washing off the resin film in areas other than the exposed areas. , a fourth step of applying carbon to form a black stripe, and a fifth step of sequentially exposing red, green, and blue phosphors to a confirmation marker for phosphor exposure. It is characterized by

In operation, according to the manufacturing method described above, after forming the black stripe, the exposure position of each of the red, green, and blue phosphors can be quickly confirmed using the mark printed on a part of each confirmation marker. It can be done accurately and automatic exposure is also possible if the confirmation marker is recognized. Therefore, quality can be stabilized, productivity can be improved, and costs are also advantageous.

EXAMPLE Hereinafter, a method for manufacturing a screen according to an example of the present invention will be explained with reference to the drawings.

First, the transparent glass plate 31 is cleaned, and then the glass plate 3
One side of 1 is roughened. After washing the glass plate stamp with water,
A thin resin film of PVA is applied to the roughened surface so that the photosensitizer can easily adhere thereto, and then a stripe-forming resin film containing the photosensitizer is formed on the resin film. Next, it is exposed to light, the resin film other than the exposed part is washed off, carbon is applied, dried, and the resin film other than the exposed part is washed off.The carbon coated on the semi-transparent film is then etched. Remove it. Then, it is developed and dried. The manufacturing steps up to the above are the same as in the conventional example.

In the manufacturing method of this example, in the subsequent exposure of the phosphor,
Noting that the screen is flat, for example, a circle 41. as shown in FIG. Patterns such as triangles 42 and squares 43 are placed on an exposure original plate 44.

The circle 41 is the red phosphor 36, the triangle 42 is the green phosphor 37,
By making the squares 43 correspond to the blue phosphors 38, the position of the red phosphor 36 can be easily confirmed when visually checking the position using a microscope. The same applies to other green and blue phosphors.

This circle 41. Triangle 42. It can also be used as an exposure position automatic recognition pattern when automatic exposure is performed using a pattern of squares 43. Also, circle 41゜triangle 42. By placing it in the square 43 pattern exposure original plate, it can be used not only for the current in-line method but also for example for the delta method, making it easy to confirm the exposure position, streamlining, and reducing costs.

Effects of the Invention According to the present invention, by placing pattern recognition marks on each of the red, green and pre-exposed original plates, it is possible to visually check their positions.
It is possible to improve productivity by enabling automatic recognition, and it is also possible to reduce costs by automatic exposure, so its practical value is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one step of a screen manufacturing method according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing the configuration of a conventional image display element, and FIG. 3 is a front view of essential parts of the screen. , FIG. 4A is a sectional view showing a conventional screen manufacturing process. 36... Red phosphor, 37... Green phosphor, 38... Blue phosphor, 41...
Circle for pattern recognition, 42... Triangle for pattern recognition, 43... Square for pattern recognition, 44...
...Exposed original plate. Name of agent: Patent attorney Toshio Nakao and 1 other person36
- Color indicator light 4X 37 - Green phosphor 38 - Blue phosphor R - One Y turn l! Cancer m angle Fig. 3 Fig. 4 (/() (E) , ?ri Fig. 4 c mouth) (J)

Claims (1)

[Claims] a first step of roughening one surface of the glass plate; a second step of forming a resin film for forming photosensitive stripes on the roughened surface of the glass plate; and an exposure treatment for the resin film. a third step of washing off the resin film in areas other than the exposed areas;
A method for manufacturing a screen comprising a fourth step of applying carbon to form a black stripe, and a fifth step of sequentially exposing red, green, and blue phosphors using a confirmation marker for phosphor exposure.