JP2519836Y2 - Projection screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a projection screen used in a projection television or the like, and more particularly to a projection screen having a Fresnel lens or a lenticular lens.

(Prior Art) Conventionally, a projection screen used for a large-sized projection screen or the like uses a sheet obtained by processing a Fresnel lens or a lenticular lens on a transparent resin such as an acrylic resin or a styrene resin. It is used by fixing it to the frame with double-sided tape.

(Problems to be solved by the invention) However, in such a screen, in order to increase the resolution and suppress the double image, the lens pitch is made fine and the base material is made thin. However, there is a tendency toward larger sizes.

However, when the screen becomes thinner and larger in size as described above, the base material is made of a synthetic resin sheet, so that the screen is easily bent, and the rigidity is insufficient, so that the flatness cannot be maintained.

For this purpose, it is necessary to consider such as applying tension to the sheet to fix it, which may increase the labor and cost of installation.

In view of such a situation, the present invention aims to provide a projection screen which has a simple structure and can be mounted securely and easily.

(Means for Solving the Problems) That is, the present invention has been made to achieve the above-mentioned problems, and the gist thereof is to be composed of a Fresnel lens sheet and a lenticular lens sheet, both lens sheets being transparent. A thin and flexible screen made of optical plastic is stretched on a peripheral frame prepared in advance, and the peripheral portion of the screen is sandwiched by a band-shaped pressing member along the peripheral frame, and in this state, the band-shaped pressing device, A projection screen is characterized in that a U-shaped staple is formed on a lenticular lens sheet and a Fresnel lens sheet, and these are integrally fixed to a peripheral frame (2). In addition, a thin and flexible screen made of translucent plastic, composed of a Fresnel lens sheet and a lenticular lens sheet, is stretched over a peripheral frame prepared in advance so as to cover the outer peripheral surface of the peripheral frame. Then, the peripheral portion of the screen is sandwiched by the band-shaped presser along the outer peripheral surface of the peripheral frame, and in this state, the band-shaped presser, the lenticular lens sheet and the Fresnel lens sheet are provided with stoppers, and these are integrated. The projection screen is characterized by being fixed to the surrounding frame.

(Example) Hereinafter, the present invention will be described with reference to the drawings of an example.

In the figure, (1) is a screen made of translucent plastic, which is composed of a lenticular lens sheet (10) and a Fresnel lens sheet (11). These lens sheets are made of translucent plastic sheets such as acrylic, polycarbonate, vinyl chloride, and polyester, and a lenticular lens or Fresnel lens is formed on one surface of this sheet. These lenses are formed by, for example, extrusion molding, press molding, cast molding, etc. which are generally used for plastics, but a lens portion is formed on a sheet or film as a base material by an ultraviolet curable resin. You may get it. In particular, the Fresnel lens sheet (11) is made by forming a Fresnel lens on a base film with an ultraviolet curable resin, and the lenticular lens sheet (10) is composed of many fibrous translucent strands. It is preferable to use a sheet which is fused and integrated into a sheet shape because the lens sheet has a small thickness and high flexibility.

In the present invention, since the screen (1) as described above is fixed to the peripheral frame (2) with a stopper as described later,
Especially when using materials that are tough and have good dimensional stability, such as polyester and polycarbonate films and sheets, and that have Fresnel lenses or lenticular lenses formed, give sufficient tension to the screen to attach it firmly and stably. There is a feature that can be used.

In the present invention, the lenticular lens sheet (1
0) and the fullerene lens sheet (11) are stretched on a peripheral frame (2) prepared in advance, and the peripheral portion is sandwiched by the band-shaped presser tool (3) along the peripheral frame (2). Then, the band-shaped presser tool (3), the lenticular lens sheet (10) and the Fresnel lens sheet (11) are driven into a stopper (4) so that they are integrally fixed to the peripheral frame (2). As the peripheral frame (2) used at this time, wood, plastic, lead or the like can be used as long as it can be used to place the stopper (4), but veneer is particularly easily used. The shape of the peripheral frame (2) is not limited to a square or a rectangle, and may be any shape such as an octagon.

As a means for fixing these, it is preferable to use a wood working staple or an electric stapler as shown in FIG. 2 and various tackers, but a pin as shown in FIG. 3 may be used. At this time, since the staple is U-shaped, the area to be pressed is wider compared to nails and the fixing is secure, which is preferable, and a pin with a large head as shown in FIG. 3 has the same effect. preferable. In the case of sticking, it is advisable to do so while applying tension to the screen (1).

Further, according to the present invention, when the lenticular lens sheet (10) and the fullerene lens sheet (11) are stretched around the peripheral frame (2), the peripheral portion is surrounded by the peripheral frame as shown in FIG. Surrounding frame (2) so as to cover the outer peripheral surface of (2)
The lenticular lens sheet (10) and the fullerene lens sheet (11) are sandwiched between the lenticular lens sheet (10) and the frennel lens sheet (11) along the outer peripheral surface of the peripheral frame (2). The lens sheet (10) and the Fresnel lens sheet (11) may be provided with a stopper (4) so that they are integrally fixed to the peripheral frame (2).

The material of the band-shaped presser tool (3) is the same as that of the peripheral frame (2).

In the present invention, since the screen (1) as described above is fixed to the peripheral frame (2) with the stopper (4), a tough and dimensionally stable material such as a polyester or polycarbonate film or sheet is used. In addition, when a lens having a Fresnel lens or a lenticular lens is used, there is a feature that the screen can be firmly and stably attached by using sufficient tension to be used.

(Effects of the Invention) Since the present invention is configured as described above in detail, it can be attached while maintaining its flatness without causing wrinkles or bending on the screen, and is easy to assemble and install. There is an effect that it can be fixed quickly and surely.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIGS. 2 and 3 are sectional views showing a part thereof. (1) …… Screen (2) …… Surrounding frame (3) …… Band-shaped presser (4) …… Stopper

Claims (4)

(57) [Scope of utility model registration request] 1. A thin and flexible screen comprising a Fresnel lens sheet and a lenticular lens sheet, both lens sheets being made of translucent plastic,
It is stretched on a peripheral frame prepared in advance, and the peripheral portion of the screen is sandwiched along the peripheral frame by a band-shaped retainer, and in this state, a U-shaped staple is cast on the band-shaped retainer, the lenticular lens sheet and the Fresnel lens sheet. Then, the projection screen is characterized in that these are integrally fixed to the peripheral frame. 2. A thin and flexible screen comprising a Fresnel lens sheet and a lenticular lens sheet, both lens sheets being made of translucent plastic,
A peripheral frame prepared in advance is stretched so as to cover the outer peripheral surface of the peripheral frame, and the peripheral portion of the screen is sandwiched between the peripheral frame and the band-shaped presser, and in this state, the band-shaped presser and the lenticular lens sheet. Also, a projection screen is characterized in that a fastener is placed on the Fresnel lens sheet and these are integrally fixed to a peripheral frame. 3. The Fresnel lens sheet according to claim 1, wherein the Fresnel lens sheet is a thin and flexible lens sheet in which a Fresnel lens is formed on the film by an ultraviolet curable resin. Projection screen. 4. The thin lenticular lens sheet is a thin and flexible lens sheet in which a large number of translucent strands are fused and integrated into a sheet shape. A projection screen according to item 3 or item 3.