A light guide of a vehicular lamp includes a first light guide body that guides incident light from a stationary side light source and is formed in a twisted bow shape, and a second light guide body that guides incident light from a movable side light source. A reflection portion is formed on the rear surface of each of the first and second light guide bodies to reflect the incident light toward the front surface, and an emission portion is formed on the front surface to emit the reflected light. First and second side surfaces of each light guide body include a curved surface that appears as a curved line on a cross section of the light guide body. A side step is formed on the first side surface of the first light guide body to reflect the incident light toward the second side surface.

A display device includes: a display panel which display an image with light and has a curvature; a light source which generates and emits the light to the display panel; a light guide plate which guides the light emitted from the light source to the display panel, the light guide plate having a curvature and defining a light incidence surface thereof through which the light is incident; a circuit board which faces the light incidence surface of the light guide plate and on which the light source is mounted; and an alignment member which is between the circuit board and the light guide plate and aligns the light source with the light incidence surface of the light guide plate.

A backlight module includes a light guide plate that includes a light incident surface including a first light incident section and a second light incident section, a light emission surface, and a first reflection surface defining a first acute angle with respect to the first reflection surface; a light bar, which includes first and second light sources respectively corresponding to the first and second light incident section such that light from the first and second light sources is allowed to enter the light guide plate to be selectively reflected by the first reflection surface and emit outward from the light emission surface; and a control circuit, which is electrically connected to the first light source and the second light source for controlling the first light source and the second light source. Also provided is a liquid crystal display that includes the backlight module and may achieve sectionized displaying.

An adjustable backlight module comprises an image data gathering device; a user data gathering device; a data analyzing device connected to the image data gathering device and the user data gathering device; a controller connected to the data analyzing device; and a LCD backlight source connected to the controller. Based on the user's demands on the image brightness and color gamut, the present invention utilizes a controller and its driving circuit to control the LED chips of two colors individually for adjusting on and off of the LED chips and the intensity of light, thereby adjusting the brightness and color gamut of the entire module, and thus carrying out effective real-time control of the brightness and color gamut.

An optical waveguide device and a head-mounted display apparatus using the same are provided. The optical waveguide device used for transmitting an image light includes a light entering surface, a first side surface, a second side surface, a plurality of beam splitters and at least one planar reflective structure. The image light enters the optical waveguide device through the light entering surface. The first side surface is parallel to the second side surface. The beam splitters are disposed between the first side surface and the second side surface. The beam splitters are parallel to each other and are arranged in intervals. The at least one planar reflective structure is disposed between the beam splitters and the light entering surface, and the planar reflective structure is parallel to the first side surface. The planar reflective structure and the light entering surface have a gap therebetween.

A light guide plate and a light source module are described. The light guide plate includes a main body, first stripe microstructures and second stripe microstructures. The main body includes a light incidence surface, a light-emitting surface and a light reflective surface opposite to the light-emitting surface. The light incidence surface is connected between the light-emitting surface and the light reflective surface. The light-emitting surface includes a first microstructure region and a second microstructure region arranged sequentially, and the first microstructure region is near the light incidence surface. The first stripe microstructures are disposed in the first microstructure region and extending along a direction from one side near the light incidence surface to the other side away from the light incidence surface. The second stripe microstructures are disposed in the second microstructure region along the direction. A gradient of each second stripe microstructure is gradually varied along the direction.

An edge-lit light guide board, a manufacturing method thereof, a backlight module and a display device are provided. In the edge-lit light guide board, a first groove is formed in the light guide board, the first groove is located at an edge of a first side of the light guide board and is spaced apart from the edge of the first side, and a side surface of the light guide board on the first side is a light incident surface.

A vehicle lamp includes a plurality of light sources and a light guide plate, the plurality of light sources are disposed in parallel along one end surface of the light guide plate, the light guide plate has a light reflection section formed at a first surface of the light guide plate and configured to reflect light entered from the one end surface toward a second surface of the light guide plate, the light reflection section includes a plurality of parabolic reflection surfaces, and the parabolic reflection surfaces protrude from the first surface and have shapes curved along a direction in which the light entering from the one end surface advances and a direction crossing with the direction in which the light entering from the one end surface advances.

An optical element includes a plurality of partially reflecting surfaces which are provided in parallel to each other with intervals, reflect a portion of image light and external light, and transmit another portion of the image light or external light; and a light transmitting member which supports the plurality of partially reflecting surfaces, in which the light transmitting member includes an incident plane that enters the image light and the external light, and an emission plane that emits the image light and the external light, and each of the plurality of the partially reflecting surfaces is disposed so as to be inclined with respect to the incident plane and the emission plane, and has a plurality of regions having different reflectances in an inclination direction.

A light pipe for transmitting lights includes a light incident wall, a light radiation wall, a first side wall, and a second side wall, the light incident wall opposite the light radiation wall, the first side wall opposite the second side wall, the first side wall and the second side wall are connected between the light incident wall and the light radiation wall, respectively. the first side wall and the second side wall are parabolic and having focal points between the first side wall and the second side wall, the first side wall and the second side wall are parabolic making the lights passing through the light radiation wall be uniformly distributed.