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    • 2. 发明授权
    • Light diffusive sheet
    • 光漫射片
    • US06963451B2
    • 2005-11-08
    • US10474806
    • 2002-06-21
    • Koichi SeYutaka Omura
    • Koichi SeYutaka Omura
    • G02B5/02F21V7/04
    • G02B5/0221G02B5/0268G02B5/0278
    • The invention provides a sheet (1) comprising a light-transmittable resin, in which irregularities are formed on both sides (1a) and (1b) of the sheet, the average surface roughness of one side (1a) which becomes the light-entering side is from 0.2 to 5.0 μm and larger than the average surface roughness of the opposite side (1b) that becomes the light-departing side, wherein the average surface roughness of the opposite side (1b) is from 0.2 to 2.0 μm, and the surface area ratio of the one side (1a) is smaller than the surface area ratio of the opposite side (1b).
    • 本发明提供了一种片材(1),其包括可透光树脂,其中在片材的两侧(1a)和(1b)上形成凹凸,其中一侧(1a)的平均表面粗糙度成为 光进入侧为0.2〜5.0μm,大于成为脱光侧的相反侧(1b)的平均表面粗糙度,其中相对侧(1b)的平均表面粗糙度为0.2〜 2.0μm,一侧(1a)的表面积比小于相对面(1b)的表面积比。
    • 3. 发明授权
    • Light diffusing sheet and backlight unit using the light diffusing sheet
    • 使用光漫射片的光漫射片和背光单元
    • US07645058B2
    • 2010-01-12
    • US10590605
    • 2005-02-25
    • Yuji KurokawaYutaka Omura
    • Yuji KurokawaYutaka Omura
    • F21V7/04F21V5/00
    • G02B6/0038B32B3/30B32B27/18G02B5/0221G02B5/0231G02B5/0242G02B5/0278G02B6/0051
    • To provide a light diffusing sheet which enables the light from a lightguide plate or light source of a backlight unit to be conducted to lens film after having been converted to diffused light having a small brightness peak angle, and which generates neither a moiré or interference fringe nor luminance unevenness, and is advantageous also in terms of productivity and cost, and to provide a backlight unit having this light diffusing sheet incorporated therein, and the surface of the sheet with fine recesses formed therein serves as a light emission side. The light diffusing sheet comprises a light-transmitting resin, characterized by having fine recesses formed in at least one of the surfaces thereof, the fine recesses having a shape which is any of the shapes of an inverted polyangular pyramid, an inverted truncated polyangular pyramid, an inverted cone, and an inverted truncated cone.
    • 为了提供一种光漫射片,其能够使得来自背光单元的光导板或光源的光在转换成具有小的亮度峰值角的漫射光之后被传导到透镜膜,并且不产生莫尔条纹或干涉条纹 也没有亮度不均匀,并且在生产率和成本方面也是有利的,并且提供一种其中结合有该光漫射片的背光单元,并且其中形成有精细凹槽的片的表面用作发光侧。 光漫射片包括透光树脂,其特征在于,在其至少一个表面上形成有细小的凹部,所述细小凹部具有倒置的多角锥体,倒立的多角锥体, 倒锥体和倒锥体。
    • 7. 发明申请
    • Light diffusing sheet and backlight unit using the light diffusing sheet
    • 使用光漫射片的光漫射片和背光单元
    • US20070171671A1
    • 2007-07-26
    • US10590605
    • 2005-02-25
    • Yuji KurokawaYutaka Omura
    • Yuji KurokawaYutaka Omura
    • F21V7/04
    • G02B6/0038B32B3/30B32B27/18G02B5/0221G02B5/0231G02B5/0242G02B5/0278G02B6/0051
    • [Problem]To provide a light diffusing sheet which enables the light from a lightguide plate or light source of the backlight unit to be conducted to lens film after having been converted to diffused light having a small brightness peak angle, and which generates neither a moiré or interference fringe nor luminance unevenness, and is advantageous also from the standpoints of productivity and cost, and to provide a backlight unit having this light diffusing sheet incorporated therein. [Means for Solution]The invention is composed of a light diffusing sheet 10 comprising a light-transmitting resin, characterized by having fine recesses formed in at least one of the surfaces 2 thereof, the fine recesses 3 having a shape which is any of the shape of an inverted polyangular pyramid, the shape of an inverted truncated polyangular pyramid, the shape of an inverted cone, and the shape of an inverted truncated cone. brightness peak angle of diffused light is reduced, which restrains both a moiré and interference fringe, according to light refraction due to inclined face of fine recess 3 or a taper face. The invention is composed of a backlight unit characterized by including the light diffusing sheet and has been disposed on upper side of lightguide plate 20, or in front of a light source, so that that surface of the sheet which has fine recesses formed therein serves as a light emission side.
    • [问题]提供一种光漫射片,其能够使得来自背光单元的光导板或光源的光在已经被转换成具有小亮度峰值角的漫射光之后被传导到透镜膜,并且不产生莫尔 或干涉条纹或亮度不均匀性,并且从生产率和成本的观点出发也是有利的,并且提供其中结合有该光漫射片的背光单元。 [解决方案]本发明由包括透光树脂的光漫射片10组成,其特征在于,在其至少一个表面2中形成有细小的凹部,细凹槽3具有任何形状 倒立的多角锥体的形状,倒立的多角锥体的形状,倒锥体的形状以及倒立锥体的形状。 根据由于细凹槽3或锥形面的倾斜面的光折射,扩散光的亮度峰值减小,这抑制了莫尔条纹和干涉条纹。 本发明由背光单元组成,其特征在于包括光漫射片,并且已经设置在光导板20的上侧,或者设置在光源的前方,使得其中形成有细孔的片的表面用作 光发射侧。