Young Optics Inc.

Ching-Lun Lin

Ya-Ling Hsu

Chao-Shun Chen

Wen-Hao Hsu

Wei-Hung Tsai

Yi-Hsueh Chen

Keng-Han Chuang

Ming-Chi Chen

Jyh-Horng Shyu

Hsin-Hung Lin

Wan-Chiang Wang

Kuo-Chiang Lin

A headlight using an image light source is provided, which includes a laser light source and a wavelength converter. The laser light source includes multiple light-emitting units arranged in an array to provide an image beam. The wavelength converter is arranged downstream of an optical path of the laser light source. The wavelength converter is provided with a light dot matrix with the number of rows and columns greater than or equal to 40×40 to excite a part of the image beam into an excitation beam, and an unexcited part of the image beam is mixed with the excitation beam to generate a white beam.

Headlight

A projection device is disposable into a display platform of a display rack having a plurality of display platforms, for directly projecting an image frame onto a projection screen of the display platform. The image frame projected to the projection screen is not reflected by any reflective mirror arranged between the projection device and the projection screen. A length of the image frame in a first direction is equal to at least ten times a length of the image frame in a second direction. Since no reflective mirror is arranged between the projection device and the projection screen, the projection device is more easily applicable to display racks.

Projection system, projection device and display rack

A projection lens configured to form an image from an image source which is disposed at an object side is provided. The projection lens includes a lens group and an aspheric mirror. The lens group has a first optical axis, and an intermediate image is formed by the lens group from the image source. The aspheric mirror has a second optical axis and an aspheric surface. The lens group is disposed between the object side and the aspheric mirror. The aspheric surface faces the lens group and reflects the intermediate image to form the image at an image side. The first optical axis is not coaxial with the second optical axis, and an offset of the image relative to the first optical axis is larger than or equal to 100%.

Projection lens

A projection lens including a reflective unit and a refractive unit is provided. The projection lens is disposed between an object side and an image side. The reflective unit is disposed between the object side and the image side and has a negative refractive power. The refractive unit is disposed between the object side and the reflective unit and has a positive refractive power. The refractive unit includes a first lens group and a second lens group. The first lens group is disposed between the object side and the reflective unit and includes at least one cemented lens and an aperture stop. The at least one cemented lens is disposed between the object side and the aperture stop. The second lens group is disposed between the first lens group and the reflective unit and includes at least one aspheric lens. A projection apparatus including the projection lens is also provided.

Projection apparatus and projection lens thereof capable of reducing focal length and aberration

An optical touch system includes a non-visible light source, a screen, a first and second polarizing elements, and an optical detector. The non-visible light source emits a non-visible beam. A part of the non-visible beam passes through the screen disposed in a light path of the non-visible beam. The touch object reflects the part of the non-visible beam into an object beam when a touch object approaches or touches the screen, and the object beam passes through the screen. The first polarizing element is disposed in the light path of the non-visible beam and between the non-visible light source and the screen. The optical detector is disposed in a light path of the object beam, and senses the object beam. The second polarizing element is disposed in the light path of the object beam passing through the screen and between the screen and the optical detector.

Growing community of inventors

Hsinchu, Taiwan

Ching-Lun Lin