Reflective transparent screen and image projection apparatus provided with same

A transparent screen and reflective technology, which is applied in image communication, projection devices, diffuser elements, etc., can solve the problems of unsuitable transparent partitions and low screen transparency, and achieve clear images, large viewing angles, and hot spots weak effect

Active Publication Date: 2018-07-17
JXTJ NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the conventional projector screen has low transparency, so there is a technical problem that it cannot be applied to transparent partitions and the like.

Method used

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  • Reflective transparent screen and image projection apparatus provided with same
  • Reflective transparent screen and image projection apparatus provided with same
  • Reflective transparent screen and image projection apparatus provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] Polyethylene terephthalate (PET) particles (manufactured by Bell Polyester Co., Ltd., brand IFG8L) and 0.012% by mass of flaky aluminum particles A (light-reflecting particles, primary The particles had an average diameter of 1 μm, an aspect ratio of 300, and a specular reflectance of 62.8%) were mixed with a tumble mixer for 30 minutes to obtain PET particles uniformly adhered to the surface of flaky aluminum. The obtained pellets were supplied to a hopper of a twin-screw kneading extruder equipped with a wire drawing die, and a masterbatch mixed with flake-shaped aluminum was obtained at an extrusion temperature of 250°C. Mix the obtained masterbatch and PET granules (brand IFG8L) uniformly at a ratio of 1:2, put them into the hopper of a single-screw extruder equipped with a T-shaped die, and extrude at an extrusion temperature of 250 ° C to produce a thickness of 75 μm membrane. Since the concentration of flaky aluminum particles in the film is 0.004% by mass, when...

Embodiment 2

[0166] A commercially available low-reflection film (manufactured by NOF Corporation, ReaLook 2702UV / NP-50) was bonded to the film (light-diffusing layer) side of the transparent screen obtained in Example 1 to obtain a transparent screen.

[0167] The total light transmittance of the obtained transparent screen was 90.2%, the parallel light transmittance was 85.9%, the visual reflectance Y was 2.5%, and the sharpness of image was 96%.

[0168] In addition, the diffuse reflection luminance spectrum of the transparent screen was measured by using a variable angle spectrophotometer. The result: when the incident light is at an angle of 45 degrees relative to the parallel direction of the screen surface, the diffuse reflection light in the regular reflection direction (135 degrees) When the brightness is 100, the relative brightness of diffusely reflected light at 60 degrees is 0.005, the relative brightness of diffusely reflected light at 90 degrees is 0.014, and the relative brigh...

Embodiment 3

[0170] PET pellets (manufactured by Bell Polyester Co., Ltd., brand IFG8L) and 0.005% by mass of flaky aluminum particles A relative to the PET pellets were mixed with a tumbler mixer for 30 minutes to obtain a PET with flaky aluminum uniformly adhered to the surface. particles. The obtained pellets were supplied to a hopper of a twin-screw kneading extruder equipped with a wire drawing die, and extruded at an extrusion temperature of 250° C. to obtain a flake-shaped aluminum-mixed masterbatch. Mix the obtained masterbatch and PET pellets (brand IFG8L) uniformly at a ratio of 1:4, put them into the hopper of a single-screw extruder equipped with a T-shaped die, and extrude at an extrusion temperature of 250°C to produce a product with a thickness of 50 μm membrane. Since the concentration of flaky aluminum particles in the film is 0.001% by mass, when the thickness of the film (light diffusion layer) is t (μm) and the concentration of flaky aluminum particles relative to the ...

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Abstract

The invention provides a reflective transparent screen that is capable of achieving both visibility of projected light and visibility of transmitted light by anisotropically diffusing and reflecting the projected light emitted from a light source. A reflective transparent screen according to the present invention is provided with a light diffusing layer including a binder and fine particles, wherein reflective transparent screen is characterized in that the total light transmittance is at least 60%, the parallel light transmittance is at least 50%, and the diffused reflected light luminance profile measured by a goniophotometer satisfies the following conditions A and B. A: when light enters at an angle of 45 degrees with respect to the direction parallel to a screen surface and the luminance at 135 degrees in the regular reflection direction is 100, the relative luminance of diffused reflected light at 90 degrees is at least 0.001. B: when the light enters at the angle of 45 degrees with respect to the direction parallel to the screen surface and the luminance at 135 degrees in the regular reflection direction is 100, the relative luminance of diffused reflected light at 120 degrees is at least 0.01.

Description

technical field [0001] The present invention relates to a reflective transparent screen capable of achieving both visibility of projected light and visibility of transmitted light by anisotropically diffusely reflecting projected light emitted from a light source. In addition, it also relates to an image projection device having the reflective transparent screen and the projection device. Background technique [0002] Conventionally, a screen obtained by combining a Fresnel lens sheet and a lenticular lens sheet has been used as a screen for a projector. In recent years, there has been an increasing demand for projection display of product information, advertisements, etc. on window displays of department stores, etc., transparent partitions of event spaces, etc., while maintaining their transparency. In addition, it is said that the demand for high-transparency projection-type video display screens used in head-up displays and wearable displays will increase in the future....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/60H04N5/74G03B21/14G02B5/02G03B21/00
CPCG02B5/02G03B21/00G03B21/14G03B21/60H04N5/74G02B27/01G03B21/62G03B21/625G02B5/0226G02B5/0278G02B5/0284
Inventor 八牧孝介松尾彰
Owner JXTJ NIPPON OIL & ENERGY CORP
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