公开(公告)号：US20130077316A1

公开(公告)日：2013-03-28

申请号：US13683184

申请日：2012-11-21

Applicant: NEC Corporation ,  NEC LCD Technologies, Ltd.

Inventor： Shin-ichi UEHARA ,  Shinya NIIOKA ,  Masao IMAI

IPC: F21V9/00 ,  G02B5/02 ,  G02F1/1335 ,  F21V5/00

CPC classification number: F21V9/00 ,  F21V5/002 ,  G02B5/02 ,  G02B6/0036 ,  G02B6/0038 ,  G02F1/133504 ,  G02F1/133524 ,  G02F1/133606 ,  G02F2201/44

Abstract: A display device comprising a light source and having an optical waveguide, a louver, an anisotropic scattering sheet, and a transmissive liquid crystal panel disposed along the path of light emitted from the light source. The light-restricting direction of the louver is tilted at an angle α from the Y-axis direction. The value of the angle α is set so that the arrangement direction of moiré created between the louver and the liquid crystal panel approaches the X-axis direction. A plurality of belt-shaped convex portions extending in the Y-axis direction are formed on the surface of the anisotropic scattering sheet, and are configured so that the scattering direction of the light has anisotropy. Specifically, scattering in the X-axis direction is increased, and scattering in the Y-axis direction is reduced. Moiré can thereby be reduced in a display device having increased directivity of the display.

Abstract translation: 一种显示装置，包括光源并具有沿着从光源发出的光的路径设置的光波导，百叶窗，各向异性散射片和透射型液晶面板。 百叶窗的限光方向从Y轴方向倾斜角度α。 角度α的值被设定为使得在百叶窗和液晶面板之间产生的波纹的排列方向接近X轴方向。 在各向异性散射片的表面上形成有沿Y轴方向延伸的多个带状凸部，使得散射方向具有各向异性。 具体地说，X轴方向的散射增大，Y轴方向的散射变小。 因此，可以减少显示装置的显示装置的显示方向性增加的莫尔。

公开(公告)号：US20160301904A1

公开(公告)日：2016-10-13

申请号：US15189198

申请日：2016-06-22

Applicant: NEC CORPORATION

Inventor： Masao IMAI ,  Goroh SAITOH ,  Fujio OKUMURA

IPC: H04N9/31 ,  G03B33/12 ,  G02B27/14 ,  G03B21/20

CPC classification number: H04N9/3167 ,  G02B27/149 ,  G03B21/2033 ,  G03B21/2073 ,  G03B33/12 ,  H04N9/3164

Abstract: An illumination device comprises a light source that includes a solid-state light source whose peak wavelength is set in the red wavelength band, a light source that includes a solid-state light source whose peak wavelength is set in the green wavelength band, a light source that includes a solid-state light source whose peak wavelength is set in the blue wavelength band, and a color synthesis optical element that combines P-polarized colored light incident from one light source and S-polarized colored light incident from the other two light sources. One light source includes at least one solid-state light source whose peak wavelength is set in the wavelength band of the color corresponding to one of the other light sources.

Abstract translation: 照明装置包括：光源，其包括其峰值波长设定在红色波长带的固态光源，包括峰值波长设定在绿色波长带的固态光源的光源，光 源极，其包括其峰值波长设置在蓝色波长带中的固态光源，以及组合从一个光源入射的P偏振着色光和从另外两个光入射的S偏振着色光的颜色合成光学元件 来源。 一个光源包括至少一个固态光源，其峰值波长被设置在对应于其它光源之一的颜色的波长带中。

公开(公告)号：US20150301282A1

公开(公告)日：2015-10-22

申请号：US14417849

申请日：2013-04-22

Applicant: NEC Corporation

Inventor： Masanao NATSUMEDA ,  Masao IMAI ,  Shin TOMINAGA ,  Naofumi SUZUKI ,  Mizuho TOMIYAMA ,  Yuji OHNO

IPC: G02B6/122 ,  H01L51/52 ,  G03B21/20 ,  H01L51/50

CPC classification number: G02B6/1226 ,  G02B2006/12123 ,  G03B21/2006 ,  G03B21/204 ,  G03B21/206 ,  H01L51/5016 ,  H01L51/5056 ,  H01L51/506 ,  H01L51/5064 ,  H01L51/5068 ,  H01L51/5072 ,  H01L51/5076 ,  H01L51/508 ,  H01L51/5084 ,  H01L51/5206 ,  H01L51/5262

Abstract: Provided is an optical element that highly efficiently radiates light with high directivity at low etendue. The optical element includes a light emission layer (103) generating an exciton to emit light, a plasmon excitation layer (105) having a higher plasma frequency than a light emission frequency of the light emission layer (103), an output layer (107) converting light or a surface plasmon generated on an upper surface of the plasmon excitation layer (105) into light with a predetermined output angle to output the light, and a dielectric layer (102). In the optical element, a real part of an effective dielectric constant with respect to the surface plasmon is higher in an upper side portion than the plasmon excitation layer (105) than in a lower side portion than the plasmon excitation layer (105); a dielectric constant with respect to the light emission frequency of the light emission layer (103) is higher in a lowest layer than in a layer adjacent to a lower side of the plasmon excitation layer (105); and assuming that a radiation angle of a surface plasmon-derived highly directional radiation from the plasmon excitation layer (105) to the output layer (107) side is θout,spp and a radiation angle of an optical waveguide fundamental mode-derived highly directional radiation is θout,light, an absolute value of a difference between the θout,spp and the θout,light is less than 10 degrees.

Abstract translation: 提供了一种光学元件，其在低光斑度下高度有效地散射具有高方向性的光。 光学元件包括产生发光的激子的发光层（103），具有比发光层（103）的发光频率高的等离子体频率的等离子体激发层（105），输出层（107） 将在等离子体激元层（105）的上表面上产生的光或表面等离子体激元以预定的输出角度转换为光以输出光;以及电介质层（102）。 在光学元件中，相对于表面等离子体激元的有效介电常数的实部比在等离子体激发层（105）的上侧部比在等离子体激发层（105）的下侧部分高。 相对于发光层（103）的发光频率的介电常数在与等离子体激发层（105）的下侧相邻的层中比最低层高。 并且假定从等离子体激元层（105）到输出层（107）侧的表面等离子体激发的高度定向辐射的辐射角是高光谱波导基模的衍射，spp和辐射角 定向辐射是＆...，光，绝对值之间的差异; out，spp和＆thetas; out，光小于10度。