Abstract: A light-guide optical element is provided, including a transparent light-guide body having a first inclined surface and a second inclined surface disposed therein. The transparent light-guide body includes a side surface facing a first direction, and a first surface and a second surface which are adjacent to the side surface and face each other. The first inclined surface extends from the first surface to the second surface. The second inclined surface is located at the other side of the first inclined surface facing the side surface. The second inclined surface extends from the first surface to the second surface. When an input light enters the transparent light-guide body, the input light is partially reflected by the first inclined surface and the second inclined surface to form an output light output from the transparent light-guide body.

Abstract: A head up display device includes a pancake lens and a picture generation unit. The pancake lens includes a half mirror and a reflective polarizer. The half mirror has a light incident surface and a reflective surface. The reflective polarizer is disposed on the reflective surface and combined with the half mirror for forming a reflective space. The picture generation unit is disposed in the direction of the pancake lens opposite to the user's eyes. The picture generation unit generates image light and the image light enters the reflective space from the light incident surface. After the reflection, the image light is directed towards the user's eyes to form a virtual image. The optical path of the virtual image and the image light has a un-axis angle.

Abstract: A light-guide optical element is provided, including a transparent light-guide body having a first inclined surface and a second inclined surface disposed therein. The transparent light-guide body includes a side surface facing a first direction, and a first surface and a second surface which are adjacent to the side surface and face each other. The first inclined surface extends from the first surface to the second surface. The second inclined surface is located at the other side of the first inclined surface facing the side surface. The second inclined surface extends from the first surface to the second surface. When an input light enters the transparent light-guide body, the input light is partially reflected by the first inclined surface and the second inclined surface to form an output light output from the transparent light-guide body.

Abstract: An autofocus head mounted display device is provided, including an imager and an eyeball tracker. The imager includes a display element, an optical element and a controller. An image light is projected to one of the eyeballs of the user by the display element. The convergence or divergence of the image light is adjusted by the optical element through the controller. The image is presented at an imaging position in front of the eyeballs of the user. The eyeball tracker is disposed at the position in front of the user's eyes. Both left eye and right eye rotational angles are detected simultaneously, so as to determine a focus position of the user's eyes. The eyeball tracker is connected to the controller. The optical element is adjusted by comparing the imaging position and the focus position, and the imaging position of the image is moved to the focus position.

Abstract: A hybrid PBS architecture includes a first prism, a second prism, and a beam splitting coating layer. The first prism is made of a first material, and the second prism is made of a second material being different from the first material. The beam splitting coating layer is sandwiched between the first prism and the second prism. The first material is a glass material and the second material is a plastic material.

Abstract: Display apparatus such as a see-through head-mounted display (HMD) through which a viewer could capture a scene while seeing an object through the apparatus is disclosed. In the display apparatus, a liquid crystal on silicon (LCOS) panel with a color filter attached to the LCOS panel is utilized. Accordingly, the compactness, light weight and low cost requirements can be met.

Abstract: Display apparatus such as a see-through head-mounted display (HMD) through which a viewer could capture a scene while seeing an object through the apparatus is disclosed. In the display apparatus, a liquid crystal on silicon (LCOS) panel with a color filter attached to the LCOS panel is utilized. Accordingly, the compactness, light weight and low cost requirements can be met.

Abstract: A field sequential dichroic light valve using ferro-electric liquid crystal components and multi-layer thin film broadband polarizing beam-splitting devices as an optical switch. The field sequential dichroic light valve has a fast time response and a memory function, as well as a switch frequency larger than 180 Hz and an optical transmittance larger than 90%. Accordingly, the field sequential dichroic light valve can effectively switch R, G, B-colored light beams in time sequence, and can be applied to a full-color projection display system.

Abstract: An illumination device and an image display apparatus using the same. The illumination device comprising a light source, an illumination uniformizing device, and a polarization converter. The image display apparatus comprises an illumination device provided in the invention, a synthesizing device, and a projection device.

Abstract: A field sequential color projection display system, which has high brightness, high accuracy and compact size, and is light and energy saving. The field sequential color projection system comprises: a field sequential beam splitting/combining light valve module including three light valves, which can be controlled by applied energy field, for outputting polarized light of three primary colors in time sequence; a frame sequential display module for respectively displaying frames of three primary colors corresponding to the polarized light of three primary colors output in time sequence, wherein the polarized light passes through the frame sequential display module; a projection lens module for projecting the polarized light passing through the frame sequential display module onto a screen to produce a full color image.

Abstract: An LCD projector of two-plate type is disclosed. The LCD projector comprises a light source, a color valve, a dichroic mirror, a polarization rotating device, a polarization beam splitter, a first reflective LCD panel, a second LCD panel and a projection lens. The first reflective LCD panel is used to modulate the green light with the green component of the image signal. The red light and the blue light are modulated in a time field sequential manner by the color valve and the second reflective LCD panel.

Abstract: An illumination device and an image projection apparatus having the same. The illumination device has a light source with multiple light emitting devices and an uniform illuminating means evenly distributed in front of the light source. The light emitted from the light source can thus uniformly project on a light valve. In addition, a polarization converter is used to convert the light into a usable polarization type, so as to increase the illumination efficiency. The image projection apparatus basically has three of the above mentioned illumination devices to emit three elementary color lights projecting onto a screen.

Abstract: An illumination device and an image display apparatus using the same. The illumination device comprising a light source, an illumination uniformizing device, and a polarization converter. The image display apparatus comprises an illumination device provided in the invention, a synthesizing means, and a projection means. The illumination uniformizing device has an incident plane for receiving a light emitted from the light source. Opposite the incident plane, a mirror is used as a side plane of the illumination uniformizing device to reflect the light coming from the incident plane. A bottom plane at a lower side and projection plane at an upper side of the incident plane are disposed between the incident plane and the side plane. A scattering pattern gradually condensed from the incident side toward the side plane is formed on the bottom plane, so that the light incident from the incident plane is made uniform.

Abstract: An image display is illuminated by a light source employing a plurality of low power light emitting devices. The lifetime and light intensity of the light sourceare increased by orders of magnitude. The illumination provided by the light source is made uniform to efficiently utilize the light source and so obtain optimum projection results.

Abstract: A magnification-variation scanner modifies the resolution merely by changing the object distance and the image distance, with a constant focal distance. The scanner includes a light source, an object lens, an image detector, a holder for carrying the object lens, an optical path delay and a driver. The optical path delay can be located at the midway of the light path from the light source to the object lens, thereby modifying the optical path between the object surface and the object lens. In accompaniment with the movement of the object lens, the dimensions of the image projected over the image detector can be modified. The resolution can therefore be modified. The driver connects between the holder and the optical path delay.