JPH0323434A - Laminating method for projection screen - Google Patents

Abstract

PURPOSE:To prevent the damage of screen boards and the occurrence of moire and to improve workability by inserting jigs between two facing sides, that this, the peripheral parts of the screen boards, and then, sticking adhesive members so as to wrap these pats of the screen board and the jigs themselves. CONSTITUTION:The two screen boards 11 and 12 are placed on a work bench and superimposed and closely bonded, and the jigs 2 are inserted between the superimposed screen boards 11 and 12. Therefore, a space 1A is obtained and the screen boards 11 and 12 are aligned. Tapes 3 as the adhesive members are stuck so as to wrap both parts of the screen boards 11 and 12 where the jigs 2 are inserted and the jigs 2 themselves, and the screen boards 11 and 12 are laminated. Thus, since the space is obtained between the screen boards, the damage of the screen boards and the occurrence of moire are prevented. The the screen boards are easily aligned and workability in laminating the boards is improved as well.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of laminating a projection screen by laminating a plurality of screen plates, and in particular, a method for closing gaps by inserting a jig between the screen plates. This article relates to a method of laminating projection screens that are installed and aligned. [Prior Art] Projection screens, for example, in the case of transmission screens, are often constructed by overlapping screen plates such as a Fresnel lens sheet and a Lentsch error lens sheet. Such a projection screen is shipped to an assembly factory of Projectikun TV etc. with each screen plate attached to the other, and is assembled into a cabinet. During transportation, if the screen plates were in close contact with each other, the projection screen was easily damaged by friction due to vibrations, etc. In particular, in Fresnel lens sheets, the angle of the ridges becomes sharper towards the outer edge of the sheet, so these ridges may come into contact with the top of the lenticular lens and be damaged at the outer edge of the projection screen. It was easy. On the other hand, if the screen plates were in close contact with each other when installed in a cabinet such as a television, the projection screen was prone to moiré. In particular, in Fresnel lens sheets, the grooves become deeper toward the outer edge of the sheet, so moire was often noticeable at the outer edge of the projection screen. Therefore, it was necessary to solve these problems while pasting each screen board together. Conventionally,
Known methods of pasting together this type of projection screen include a method of pasting together the outer edges of stacked screen boards with tape, and a method of pasting the screen boards together with double-sided tape. In the former method, multiple screen boards are placed on a workbench, and the tape is pasted by bending it into a U-shape while aligning each screen board. The latter method can be roughly divided into three types. The first method is to attach double-sided tape to one screen board placed on a workbench, and then overlap and attach another screen board while adjusting the position. The second method involves fixing two screen plates aligned in advance on a workbench using a fixing jig, then flipping one screen plate over and pasting it together with double-sided tape. The third method is to attach one side of the double-sided tape to one screen plate, and then overlap the other screen plate while aligning it without peeling off the release paper on the other side, and then fix it with a fixing jig. Peel off the release paper on the other side from between the screen plates and stick them together. [Intelligence M to be solved by the invention] However, with the method of pasting together the outer edges of the screen plates with tape, it is not possible to create gaps between the screen plates, which prevents the damage to the screen plates and the occurrence of moiré as described above. I couldn't do it. On the other hand, the methods of pasting together with double-sided tape had the following problems. In the first method, it was difficult to align the screen plate due to the adhesiveness of the double-sided tape. In the second method, it was necessary to prevent the screen plate, which is large and difficult to handle, from coming into contact with the fixture and being damaged. In the third method, the second
In addition to the problems with the above method, the positioning using the fixing jig was inaccurate, so it was necessary to re-align when bonding. As described above, the bonding method using double-sided tape has the problem that it takes time and effort to align the screen plates, resulting in poor workability. An object of the present invention is to solve the above-mentioned problems and provide a method for laminating a projection screen that can prevent damage to the screen plate and the occurrence of moiré, and has good workability. [Means for Solving the Problems] In order to solve the above problems, the projection screen lamination method according to the present invention includes a superposition step of overlapping a plurality of temporary screens, and an outer edge portion between each of the screen plates. an insertion step of inserting a jig into at least two opposing sides of those screen plates to create a gap and align the jig by abutting against the end of at least one of the screen plates; and inserting the jig into at least two opposing sides of the screen plates. The method consists of a pasting process of pasting a pasting member so as to wrap the screen plate and its jig. [Example] The present invention will be described in detail below with reference to the drawings and the like. 1 to 4 are diagrams showing an embodiment of a method for laminating a projection screen according to the present invention, and FIG. 1 is a flowchart showing each step of the method of the embodiment, and FIG. ~Figure 4 is
It is a process diagram for explaining the method of the same example. This embodiment consists of a superimposing step 101, an inserting step 102, and an attaching step 103. Polymerization process 1
Step 01 is a step in which two screen plates 11l2 are placed on a workbench, overlapped, and brought into close contact (Fig. 2). The projection screen 1 in this example is a transmissive screen, and the screen plate 2 is equipped with a Fresnel lens sheet with a thickness of 3 mm, and the screen plate 12 is equipped with a Lenchi lens sheet with a thickness of 1 mm. It uses Insertion process] 02 is the overlapped screen plate 11.
This is the step of creating a gap LA by inserting the jig 2 between the screens 11 and 12, and the step of aligning the temporary screens 11 and 12 (Fig. 3). In this example, the jig 2 has a T-shaped cross section as shown in FIG. 3A.The jig 2 has an insertion portion 2a,
The length of the insertion part 2a is l, = 5 mm, the length of the abutting part 2b is l* = 3 mm, the length of the abutting part 2C is L = 1 mm, and the length of each part is Thickness t1~Ls=1
It is set in mm. The length of the insertion portion 2a is such that it does not fit into the effective screen of each screen plate 11, 12. As shown in FIG. 3B, the insertion portion 2a of the jig 2 is inserted into the two opposing left and right sides of the projection screen l, and the outer edge portions 11a and 12a of each screen plate 11.12.
It is inserted between. For this reason, each screen plate 11.
Since the gap 1A can be provided between the screen plates 1112, each screen plate 1112 will not be damaged by abrasion during transportation, and it is also possible to prevent moire from occurring when the screen plates 1112 are assembled into a cabinet. On the other hand, when the jig 2 is inserted, as shown in FIG. Matching can be done easily. For the jig 2, it is preferable to use a highly rigid material such as hard vinyl chloride or aluminum when bonding soft and non-rigid screen plates. If the jig 2 made of such material is used, the projection screen 1
becomes easier to handle. On the other hand, in the case of a rigid screen plate, it is preferable to use a material with cushioning properties such as rubber or foamed plastic. In this way, when handling the projection screen 1, the screen board can be protected from impact, etc., thereby increasing safety. Furthermore, if the jig 2 with cushioning properties is pressed against the screen plate and then bonded together with tape 3, which will be described later, the screen plate will adhere tightly to the jig 2 and will not wobble. In the pasting step 103, tape 3, which is a pasting member, is pasted so as to wrap around each screen board 11.12 and the jig 2 in the portion where the jig 2 is inserted, and each screen board I L is pasted.
This is the process of pasting l2 together. The tape 3 to be pasted may be bent in a U-shape so as to cover the entire portion into which the jig 2 is inserted, or may be similarly bent so as to wrap only a portion thereof. The thickness of the tape 3 is not particularly limited, but is preferably about 1 mm to 3 mm.
As the material, polyester, polyacetate, etc. can be used. In this example, tape 3 has a width of approximately 1
A polyester tape having a thickness of 5 mm and a thickness of approximately 1 mm was used, and was pasted in a U-shape so as to wrap around the outer edges 11a, 12a and the jig 2, and the screen plates 11 and 12 were pasted together. FIG. 5 is a cross-sectional view showing another embodiment of the jig used in the method of laminating projection screens according to the present invention.
Note that parts that perform the same functions as those in the above-mentioned embodiment are designated by the same reference numerals, and some explanations will be omitted. The jig 4 used in this example has an L-shaped cross section, and the length of the insertion portion 4a is l = 5 mm. 4b length 7! ■-3mm, the thickness of each part is 1mm. To bond using the jig 4, the thin screen plate 12 is superimposed on the upper side of the screen plate l1 (overlapping step 101), and the insertion portion 4a is attached to the outer edge 11a. 12a to bring the contact portion 4b into contact with the end portion 1lb of the screen plate l1 (insertion step 102), and apply the tape 3 so as to wrap the outer edge portions 11a, 12a and the jig 4 (application step 10).
3) Just do it. Various modifications can be made without being limited to the embodiments described above. The method of laminating projection screens according to the present invention is not limited to laminating transmissive screens, but can also be applied to laminating reflective screens composed of a plurality of screen plates. Not limited to 2, but 3
It may be more than one sheet. Further, the shape of the jig may be any shape as long as it has a part inserted between the screen plates and a part that comes into contact with the end of the screen plate, and has a T-shaped cross section or an L-shaped cross section as in the above example. It is not limited to those with shapes. Furthermore, if there are three or more screen plates to be pasted together, a T-shaped jig and an L-shaped jig may be combined, or a jig with a comb-shaped cross section may be used. The jig is not limited to the two opposing left and right sides of the projection screen, but may be inserted into the two vertically opposing sides or the three or four sides of the screen plate. The attachment member may be made of resin or metal and have a U-shaped cross section, and may be attached so as to wrap around the outer edge of the screen board. [Effects of the Invention] As explained in detail above, according to the present invention, since the jig is inserted between the outer edges of the screen plates and the screen plates are pasted together, a gap can be provided between the screen plates. This can prevent damage to the screen board and the occurrence of moiré. Furthermore, since the jig to be inserted comes into contact with the edge of the screen plate, the positioning of the screen plate becomes easier and the workability of laminating is improved.

[Brief explanation of the drawing]

1 to 4 are diagrams showing an embodiment of a method for laminating a projection screen according to the present invention, and FIG. 1 is a flowchart showing each step of the method of the embodiment, and FIG. ~Figure 4 is
It is a process diagram for explaining the method of the same example. FIG. 5 is a cross-sectional view showing another embodiment of the jig used in the method of laminating projection screens according to the present invention. ■...Projection screen 11.12...Screen plate 2.4...Jig 3...Tape

Claims (1)

[Claims] A superimposition process of overlapping a plurality of screen plates, and a jig that is inserted into the outer edges between the screen plates to create a gap and abuts against the end of at least one of the screen plates to align them. Lamination of a projection screen comprising an insertion step of inserting the screen plate into at least two opposing sides, and a pasting step of pasting a pasting member so as to wrap the screen plate and the jig at the portion where the jig is inserted. Method.