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Dihedral corner reflector array optical element and method for fabricating the same and display device using the same

A technology of dihedral reflectors and optical elements, applied in the direction of optical elements, optical elements, optics, etc., can solve problems such as damage, real image deformation, and inability to form real images, so as to reduce frictional resistance, reduce scratch damage, Reduce the effect of transmitted light

Inactive Publication Date: 2012-03-21
STANLEY ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the optical element is forcibly separated from the stamper, the detached stamper will become a deformed dihedral reflector array optical element, causing deformation or destruction of the real image formed by the optical element, and in severe cases, resulting in The problem of not being able to form a real image (not seeing)

Method used

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  • Dihedral corner reflector array optical element and method for fabricating the same and display device using the same
  • Dihedral corner reflector array optical element and method for fabricating the same and display device using the same
  • Dihedral corner reflector array optical element and method for fabricating the same and display device using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066]As Example 1, in order to improve the transferability of the molding operation, the molten resin is injected into the cavity of the molding die while the stamper (first molding die) is kept at a temperature higher than a predetermined temperature, and then the After the cavity is filled with resin, the mold is cooled at another temperature lower than the predetermined temperature, so that the molded dihedral reflector array optical element is separated from the first and second molds.

[0067] First, if Figure 8A As shown, the predetermined stamper 101 and the second molding die 102 having a flat surface are clamped to be in close contact with each other, and the molding die is kept at a temperature higher than the softening temperature of the resin (for example, 200°, due to acrylic resin) by heating. The softening temperature is about 100°). A heating device SH for heating the stamper and a cooling device SC for cooling the stamper are built in the stamper 101 used i...

Embodiment 2

[0080] As Example 2, in order to improve the release property, the molding device is operated so that at least one of the second molding die 102 and the press die 101 moves relatively in the release direction R, and the formed dihedral corner reflector The arrayed optical element is separated from the first and second molding dies.

[0081] First, if Figure 13A As shown, a predetermined stamper 101 and a second molding die 102 having a flat surface are clamped against each other, and then they are heated to a temperature higher than the softening temperature of the resin to be injected (for example, in the case of using an acrylic resin). is 200°).

[0082] Then, if Figure 13B As shown, the molten resin 104 is injected into the cavity between the die 101 and the second molding die 102 through the gate portion 103 of the molding die by using high pressure.

[0083] Then, if Figure 13C As shown, after the resin 104 is injected, the stamper 101 and the second molding die 1...

Embodiment 3

[0089] Regarding the method shown in FIG. 13, there may be a problem that it is difficult for the second molding die 102 or the press die 101 to relatively move in the above-mentioned ejection direction R due to the molding device. The mold or die is generally allowed to move in a direction perpendicular to the base plane of the molding device. For this problem, a solution is provided: the stamper and the mold are arranged to be inclined at a predetermined angle with respect to a reference plane. To obliquely set the stamper and die at a predetermined angle, a metal block member 102a and auxiliary metal mold 101a are provided to fix the second molding die 102 and stamper 101 obliquely at a predetermined angle with respect to the reference plane of the molding apparatus. Specifically, the metal block part 102a and the auxiliary metal mold 101a are metal blocks each having complementary planes inclined at a predetermined angle (12.3°) with respect to the reference plane of the m...

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Abstract

The invention provides a dihedral corner reflector array optical element and a method for fabricating the same and a display device using the same. For a method fabricating a dihedral corner reflector array optical element, a molding die having a reversal shape of the prism bodies is used. Each prism body has a frustum shape having an end plane whose area is smaller than that of the base plane side of the substrate. Each prism body is composed of a rectangular parallelepiped portion including the orthogonal plane sides to be a dihedral corner reflector and a taper portion integrated therewith having sides being non-parallel to the orthogonal plane sides. The method includes clamping the molding die to define a cavity therein; forming the optical element made from molten resin in the cavity; and parting the optical element from the molding die. The molding dies are relatively moved in a parting direction that the molding die leaves the orthogonal plane sides before anything else to part the optical element.

Description

technical field [0001] The present invention relates to a reflective real image forming element that forms a real image (real mirror image) of an object to be observed in a space on the observer side, and more particularly to a dihedral reflector array optical element and a manufacturing method thereof, and to utilizing the two Display devices with facet corner reflector array optical elements. Background technique [0002] A display device that enables an observer to see a real image (real mirror image) of an observed object in the air has been proposed (see WO2007-116639). [0003] Specifically, such a display device includes: a reflective real image forming element that forms a real image (real mirror image) of the observed object in a space on the observer's side; The observed object in the space of . [0004] Document WO2007-116639 discloses a reflective real image forming element (the so-called dihedral reflector array optical element), in which a plurality of unit o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08G02B5/09B29D11/00
CPCG02B5/124B29D11/00605
Inventor 杉山贵北村雄树青木靖浩
Owner STANLEY ELECTRIC CO LTD
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