Light control film and backlight device using it
A light control, thin film technology, applied in lighting devices, semiconductor devices of light-emitting elements, optics, etc., can solve problems such as reducing frontal brightness and contact damage
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Embodiment 1～4
[0099] Four types of molds (1) to (4) that form specific concavities and convexities are made by laser precision processing technology, and ultraviolet curable resin with a refractive index of 1.50 is injected into the molds of (1) to (3), and the refractive index is 1.40 The silicone resin is injected into (4) the mold. Then, after the injected resin was cured, it was removed from the mold, and 23cm (perpendicular to the light source)×31cm (parallel to the light source) light control films (1) to (4) (Example 1 to) were obtained. 4's light control film).
[0100] Next, the surface shape of the uneven surface (light emitting surface) of the light control films (1) to (4) was measured with a surface profile measuring device (SAS-2010SAU-II: Meishin Koki Co., Ltd.) in accordance with JIS B0601:2001 . The stylus shape of this surface profile measuring device is a cone with a spherical tip, the tip radius is 2 μm, the taper angle of the cone is 60 degrees, and the measurement interval...
Embodiment 5～8
[0109] Four types of molds (5) to (8) that form specific concavities and convexities are produced using laser precision processing technology, and an ultraviolet curable resin with a refractive index of 1.50 and a silicone resin with a refractive index of 1.40 are respectively injected into the molds (5) to (5) to (7) and a single mold (8). Then, after curing the injected resin, it was taken out from the mold, and 23 cm×31 cm light control films (5) to (8) (light control films of Examples 5 to 8) were obtained.
[0110] Next, in the same manner as in Examples 1 to 4, the surface shapes of the uneven surfaces (light exit surfaces) of the light control films (5) to (8) were measured in accordance with JIS B0601:2001. The measurement was carried out in any direction at 5 points on each light control film, and the average of the absolute value of the inclination of the light incident surface (θ aye ). In addition, the sharpness of the cross-sectional curve specified in JIS B0601:2001 ...
Embodiment 9～12
[0148] Four kinds of molds (15)~(18) are made by laser precision processing technology to form specific concavities and convexities, and ultraviolet curable resin with a refractive index of 1.50 is injected into the molds (15)~(17), and silicon with a refractive index of 1.40 is injected into the molds (15)~(17). The ketone resin is injected into the mold (18). Then, after curing the injected resin, it was removed from the mold to obtain 23 cm×31 cm light control films (15) to (18) (the light control films of Examples 9 to 12).
[0149] Next, the surface shape of the uneven surface (light emitting surface) of the light control films (15) to (18) was measured with a surface profile measuring device (SAS-2010SAU-II: Meishin Koki Co., Ltd.) in accordance with JIS B0601:2001 . The shape of the stylus of this surface profile measuring device is a cone with a spherical tip, the tip radius is 2 μm, the taper angle of the cone is 60 degrees, and the measurement interval is 1.0 μm.
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