JPS62287553A - Image forming device - Google Patents

Abstract

PURPOSE:To keep off any degradation in a formed image in the case where there is produced any misregistration between an electron beam generator and an irradiated member of a phosphor screen or the like, by performing the trajectory adjustment of an electron beam by means of a deflecting device. CONSTITUTION:When misregistration is produced between an electron beam generator 2 and an irradiated member 3, voltage corresponding to a misregistration quantity x in an X direction is impressed between plate electrodes 4a and 4b by a variable voltage source 5a as well as voltage corresponding to a misregistration quantity y in a Y direction is impressed between plate electrodes 4c and 4d by a variable voltage source 5b. And, all electron beams are subjected to deflecting trajectory adjustment in both X and Y direction as much as the quantity corresponding to relative misregistration quantities x and y between the generator 2 and the irradiated member 2, irradiating the right position.

Description

[Detailed description of the invention] 3. Detailed description of the invention.

[Industrial Application Field] - The present invention relates to an image forming apparatus using electric F-rays, and more specifically, to an image forming apparatus using an electron beam generator equipped with a plurality of electric T-beam generators. . The present invention relates to prevention of quality deterioration of formed images due to relative positional deviation between an electron beam generator and an irradiated member.

[Prior art] In recent years, for example, Japanese Patent Publication No. 54-30274 L, t, Japanese Patent Application Publication No. 111272/1983 (corresponding to U.S. Pat. No. 4,259,878), No. 5B-15529 (US Pat. No. 4,303)
An electric beam generating device using a so-called cold cathode has been developed, as shown in Japanese Patent Application Laid-open No. 5'R-AAS2A-1).

1-Power distribution 1''-The cold cathode in the beam generator is currently the most commonly used hot cathode in the electric r-beam generator. In contrast to the large restrictions imposed on reducing the area, there is an advantage that there is almost no such restriction.Additionally, hot cathodes can be arranged in multiple pieces with uniform characteristics and with high positional accuracy. On the other hand, cold cathodes can be formed using manufacturing processes such as photolithography and electric f-line ring refining, allowing multiple pieces to be arranged with uniform characteristics and high positional accuracy. Therefore, according to this technology or similar technology, a large number of electrical
It is possible to obtain an electron beam generating device including an r-beam generating section 11, and its application to various image forming devices including display devices can be considered.

Conventionally, as shown in FIG.
A display device is known in which an electron beam generating device 2 having a -dimensional array of electron beam generating sections 1 is arranged in a range corresponding to the entire display area of a fluorescent screen 3', and is arranged opposite to a fluorescent screen 3'.
JP-A-54-111272).

With such a display device, it is possible to eliminate the need to deflect and scan the electron beam sequentially from the center of the fluorescent screen 3' to the right and left ends of the fluorescent screen 3', making it possible to make the display device thin and box-shaped. It becomes possible.

[Problems to be Solved by the Invention] However, in the display device described in L, for example, when welding and fixing the fluorescent screen to the display device main body or when vacuuming the inside, it is difficult to connect the electric R-beam generator and the fluorescent screen. If a positional shift occurs between them, the electron beams emitted from each electron beam generating section will not be irradiated to the correct position. This -v
For example, in the case of a color image display in which R, G, and H phosphors are painted separately, deviation in the irradiation position of the T beam appears as a color shift, which can significantly degrade the quality of the displayed image. becomes.

This problem,? The type IE image display system as described above is not limited to two positions, but always occurs in image forming apparatuses using electric F-beam generators equipped with multiple electron beam generators. It is in the nature of getting.

The present invention has been made in view of the problems mentioned above, and its purpose is to prevent the formation of a An object of the present invention is to provide an image forming apparatus that can prevent image quality from deteriorating.

[L stage to solve the problems] 1-. One stage to solve the above problems will be explained with reference to FIG. 1 corresponding to an embodiment of the present invention. - One step of the image forming apparatus is to provide an image forming apparatus having a deflection means 4 for correcting the trajectory of the electron beam according to the relative positional deviation 111 between the electric T-beam generator 2 having the beam generating section 1 and the irradiated member 3. This is what we are teaching.

[Function] According to the image forming apparatus according to the present invention, even if the assembly L
Even if a positional deviation occurs between the electron beam generator 2 and the irradiated member 3 during the process, the positional deviation can be corrected by deflecting the electron beam with the deflection means 4 and correcting the trajectory according to this relative positional deviation. 'its in the correct position regardless of /-
Beam can be irradiated.

[Embodiment] As shown in FIG. 1, an electric r-beam generator 2 and an irradiated member 3 are provided facing each other, and a deflection means 4 is arranged between them.

'lli, the T-beam generator 2 is, for example, the same substrate.
By arranging a plurality of cathodes on the body, a six-electron T-
As the cathode forming the beam generating section l, a cold lI2 pole is optimal. Further, the electric f-beam generators 1 in this embodiment are arranged in a -dimensional array so as to irradiate the electric f-beam within a predetermined nm region of the irradiated member 3. Here, the -dimensional array means that the number of sheets is arranged both vertically and horizontally.

The deflection means 4 in this embodiment is composed of a pair of left and right (X direction) f-plate electrodes 4a, 4b and a pair of +i-plate electrodes 4c, 4d (in the Y direction). Each set of plate electrodes 4
a and 4b, 4c and 4d are arranged facing each other in the horizontal direction, with the trajectory of all the beams emitted from the beam generator 1 in between. is from the variable voltage source 5d, and between the plate adjustment electrodes 4c and 4d is
The transformer positive voltage source 5b is capable of applying a required voltage to each of them. Incidentally, as the deflection means 4, the plate electrode 4 described in
Electromagnetic coil shades other than a to 4d can be used.

The irradiated member 3 forms a fixed image or a variable image by irradiating it with an electron beam. Specifically, when this image forming apparatus is used as a display device, for example, a fluorescent screen shade in which phosphors of three colors R, G, and B are painted is used at a position corresponding to the electric r-beam generation ii1. Can be done. Further, when used as a photoresist device, the photoresist layer may be made of a material. In addition, 6 is ゛It! : An accelerating voltage source for accelerating the F beam.

Assume that after the image forming apparatus has been assembled A''-f, a positional shift occurs between the electric T-beam generator 2 and the irradiated member 3 as shown in FIG. 2, for example. is a projection view onto the irradiated member 3, where the area indicated by the dotted line is the area to which the electric r-beam should originally be irradiated, and the area indicated by the solid line is the area due to positional deviation (
Positional deviation in the X direction j5Δx, positional deviation in the Y direction 8+4Δ
As a result of step y), the areas 4d' to 4d' that were irradiated with the electric r-beam are the mo board electric J4i 4 a to 4d, respectively.
This is a projected image of

For the positional deviation described in L, a voltage corresponding to the positional deviation li1ΔX in the X direction is applied between the plate electrodes 4a and 4b by the variable voltage source 5a, and a voltage corresponding to the positional deviation jItΔy in the Y direction is applied to the variable voltage source 5a. It is possible to apply the voltage between 11 plate electrodes 4c and 4d at 5b.

At this time, the flat electrodes 4a and 4b, 4c and 4d.

If it has a length and interval of 1-minute, it can be considered that a uniform electric field is applied to all the electric T-beams irradiated from the electric F-beam generator 1, and therefore, “1” which gives equal deflection to all electric r-beams.
9 is u (function. Then, as a result, the entire r-beam is shifted in the X direction and Y
The deflection trajectory will be corrected in the direction, and the 1[shi position will be irradiated.

In the embodiment 1- above, an image forming apparatus is provided in which a plurality of electric F-beam generators l are coplanar with the electron beam generator 2 arranged one-dimensionally, but the electric T-beam generator 1 is
Instead of a two-dimensional array, it may be a -dimensional array. Here, the term "-dimensional array" refers to arraying in columns in the vertical or horizontal direction.

In addition, in the above-mentioned embodiment, the case where misalignment occurs in both the X and Y blade directions was taken as an example, but due to the nature of the manufacturing process or the arrangement of the electric f-beam generating portion l, misalignment by one position may occur. If the deflection is limited to one direction, for example, one deflection stage 4 may be used, in which one of the two pairs of plate electrodes 4a and 4b, 4c and 4d is omitted.

[Effects of the Invention] As explained above, according to the present invention, the trajectory of the electric L beam can be corrected even when a positional deviation occurs between the electron/beam generator 2 and the irradiated member 3. Accordingly, the electric L beam can be irradiated to the correct position, and a high-quality image can be formed. Therefore, the electron beam generator 2
When it is necessary to assemble the irradiated member 3 and the irradiated member 3 with high positional accuracy, it is possible to avoid delays in glass welding, vacuum evacuation, etc., which lower manufacturing yields and increase costs. , Providing low price by producing Daiiso
It is something that becomes q-noh.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an image forming apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of its operation, and FIG. 3 is an explanatory diagram of a conventional technique. 1 double f-beam generator, 2 double electric f-beam generator, 3: irradiated member, 4: deflection 1
Stages, 4a to 4d: flat plate electrodes. 5a, 5b: 71 (Variable voltage source, 6: Accelerating voltage source, 44s 100 steps Ichikenta Ii) 1 Showa 1 Figure 1

Claims (1)

[Claims] 1) An image forming apparatus characterized by having a deflection means for correcting the trajectory of the electron beam in accordance with the amount of relative positional deviation between an electron beam generator including a plurality of electron beam generators and a member to be irradiated.