A transparent screen includes a substrate capable of transmitting light; and a plurality of dots formed on a surface of the substrate, each of the dots having wavelength-selective reflectivity and being formed of a liquid crystal material having a cholesteric structure, in which the cholesteric structure gives a striped pattern of bright parts and dark parts in a cross-sectional view of the dot observed by scanning electron microscope, the dot includes a portion having a height that increases continuously to the maximum height in a direction extending from the edge toward the center of the dot, and in the portion, the angle formed by the normal line to a line that is formed by a first one of the dark parts as counted from the surface of the dot on the opposite side of the substrate and the surface of the dot is in the range of 70° to 90°.

A display includes light-scattering regions. Each of the light-scattering regions is provided with linear protrusions and/or recesses having the same longitudinal direction. The light-scattering regions are different from each other in the longitudinal direction.

A pseudo random dot pattern is easily created by a geometric approach. A pseudo random dot pattern 1A is created by arranging zigzag arrangements R at a predetermined pitch in an x direction on an xy plane while periodically altering positions thereof in a y direction, the zigzag arrangements R each including an arrangement Rb and an arrangement Rc repeatedly provided at predetermined intervals in the y direction, the arrangement Rb including dots arranged at a positive inclination, the arrangement Rc including dots arranged at a negative inclination.

This light-emitting device has a light-emitting element, whereof the shape in planar view is rectangular, for emitting light, and a light flux control member. The light flux control member has an entry surface, a back surface, and where grid-shaped protruding stripes comprising a plurality of protruding stripes disposed into a grid shape or grid-shaped recessed stripes comprising a plurality of recessed stripes disposed into a grid shape are formed; and an exit surface disposed on the surface facing away from the back surface, and where the light that has entered the entry surface is caused to exit. Of the angles formed by each of the four sides constituting the outer edges of the light-emitting element and a first virtual straight line that is parallel to the crest lines of the grid-shaped protruding stripes or the valley lines of the grid-shaped recessed stripes, the smaller angle is an acute angle.

A light deflection diffusion sheet, a stacked light deflection diffusion sheet, and a stacked optical sheet that are used in a liquid crystal panel are disclosed. A liquid crystal display (LCD) device include a liquid crystal panel having a length direction and a width direction; a surface light emitting module; a base sheet disposed between the liquid crystal panel and the surface light emitting module; a light diffusion layer disposed on a surface of the base sheet facing the surface light emitting module and diffusing light incident from the surface light emitting module; and a light deflection layer disposed on a surface of the base sheet facing the liquid crystal panel and controlling a travel direction of the light.

A scanner for scanning a QA test slide as part of a stain QA method, and method of using the scanner are described. The scanner comprises a housing defining an interior of the scanner, a slide holder within the housing and configured to receive a QA test slide, a digital camera within the housing and arranged to capture an image of the QA test slide when located in the slide holder, and a light source within the housing and arranged to illuminate both a rear side and a front side of the QA test slide when located in the slide holder.

A display device includes a cover unit and a display panel coupled to the cover unit. The cover unit includes a first base member disposed on the display panel and including a first area and a second area when viewed in a plan view, a pattern layer disposed between the first base member and the display panel, a color layer disposed between the first base member and the pattern layer and having a light transmittance, and a reflective layer disposed between the display panel and the pattern layer.

A compound reflective plate includes a metal base and a reflective film. The metal base includes a reflective surface. The reflective film is covering the reflective surface. The reflective film includes colloidal transparent substrate, reflective particles, and diffusion particles. A surface of the reflective film opposite to the metal base is a rough, irregular, and curved surface. A mass ratio of the diffusion particles to the sum of the colloidal transparent substrate and the reflective particles ranges from 0.05 to 0.07. A mass ratio of the reflective particles to the colloidal transparent substrate ranges from 0.25 to 0.54.

According to some embodiments, a transparent screen includes a first transparent substrate having a first transparent substrate index of refraction and including a surface relief pattern, a partially reflective coating formed on the surface relief pattern, and a second transparent substrate bonded over the partially reflective coating with an optical adhesive having the first transparent substrate index of refraction.

A head-up display apparatus includes a light source portion that projects light from a light source, a screen member that has a diffusion portion inclined with respect to a hypothetical reference line that extends along a projection direction of the light from the light source, and a light-transmissive optical element that is disposed between the light source portion and the diffusion portion and has a first optical surface exposed to the light source portion and a second optical surface exposed to the diffusion portion. The projection direction corresponds to a center of the image. The diffusion portion diffuses the light from the light source. A distance between the first optical surface and the second optical surface increases in a direction from a side on which the diffusion portion is closer to the light source portion to a side on which the diffusion portion is farther from the light source portion.