Sekonix Co., Ltd.

Hyundai Electronics Industries Co. Ltd.

Sung-Hoon Hwang

Hee-Joong Lee

Seung-Ki Hong

Jin-ho Kim

Young-Hun Lee

A projection lens unit for a pico-projector includes a plurality of plastic lenses and a single glass lens to minimize a change in focal length due to the heat generated inside the pico-projector. The lens array includes:

Projection lens unit for pico-projector

A projection lens unit for a pica-projector includes a plurality of plastic lenses and a single glass lens to minimize a change in focal length due to the heat generated inside the pico-projector. The lens array includes:

There is provided a projection lens unit for a pico-projector which comprises a lens array, a color composition prism, a cover glass and an image panel, the projection lens unit characterized in that: the lens array includes 1to 6lenses sequentially arrayed from a screen on which an image is projected, the 1lens includes a stop side formed on a 1side of the 1lens, the stop side stops the passage of light, to perform the function of a diaphragm aperture, light passing from the 1lens to the 6lens travels in only one direction of the lens sides based on the diaphragm aperture, and parts of the lens sides through which the light does not pass are cut so that the whole height of the lens array is reduced.

A frequency converter is disclosed, which improves processing time and reduces hardware costs, in converting input data sampled at a first frequency into output data compatible with a system operating at a second frequency. The frequency converter has first and second coefficient generators for calculating first and second coefficient values, respectively. The frequency converter uses an interpolator for interpolating input data using the first and second coefficient values into the output data. In addition, a dual-port memory stores the output data in accordance with the first frequency and outputs the stored data in accordance with the second frequency.

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Seoul, South Korea

Sung-Hoon Hwang