Samsung Electronics Co., Ltd.

Young Mo Hwang

Young Jun Park

Jung Ho Park

Yong Hoon Kim

Jin Ho Lee

Seung Nam Cha

A video image projection apparatus is disclosed. The apparatus uses a laser as a light source and modulates the light beam using a modulator according to an image signal. The apparatus projects the modulated light to a screen using a light scanning system. The laser display system includes three primary color laser light sources, an optical system needed for three-color light combining/separation, a light modulator loading the image signal into the three-color laser, and a driving circuit driving the system by processing the video signal electronically. A hybrid video laser color mixer has a structure that combines very small-sized hybrid light beam combining/separation optical elements and a 3-channel light modulator. It allows the size of the image projection apparatus to be about 6 by 5 by 3 centimeters. Additionally, the light alignment of the elements is close to self-alignment.

Large screen compact image projection apparatus using a hybrid video laser color mixer

A light separation apparatus using a flat plate including a wide band anti-reflection coating film, first and second dichroic mirrors, a wide band high-reflection coating film, an anti-reflection coating film, and a material forming the flat plate. The wide band anti-reflection coating film allows an incident light beam generated by a light source to penetrate into the material at a first angle without reflection. The first dichroic mirror allows only a light beam with a first wavelength to penetrate at the first angle and reflects light beams with other wavelengths at the second angle. The high-reflection coating film reflects at a second angle the light beam reflected by the first dichroic mirror. The second dichroic mirror allows only a light beam with a second wavelength to penetrate outside the material at the first angle so that it is parallel to the light beam with the first wavelength penetrated through the first dichroic mirror. The second dichroic mirror also reflects the light beam with a third wavelength at a second angle. The high-reflection coating film reflects the light beam reflected from the second dichroic mirror at the second angle. The anti-reflection coating film allows the light beam with the third wavelength to penetrate outside the material at the first angle without reflection so that it is parallel to the light beam with the second wavelength penetrated through the second dichroic mirror. The light beam penetrated through the wide band anti-reflection coating film and the light beams reflected from the first dichroic mirror, the second dichroic mirror, and the wide band high-reflection coating film pass through the material.

Apparatus and a method for separating a light beam using a hybrid

A light combining apparatus using two flat plates combines three separate light beams having blue, green and red wavelengths to a single combined light beam for a light source by an easier and simple small-sized device and makes the combined light beam smoothly enter the place for implementing the final information. The apparatus includes a reflection mirror for reflecting light beams with all of the wavelengths, at least one filter for transmitting only at least one light beam with a specific wavelength and reflecting light beams with the other wavelengths, and a medium located between the reflection mirror and the filter, through which the incident light beams and the reflected light beams pass, wherein the three light beams are combined into a single light beam within the medium which single light beam then exits the apparatus. A method of combining separate light beams having different wavelengths is also disclosed.

Apparatus and a method for combining light beams by using two flat

An apparatus for separating an incident light beam from a light source into three light beams having different colors by a mirror mechanism constructed in a particular way. The apparatus separates white-light into three colors of red, green, and blue and includes a first dichroic mirror, a wide band high-reflection mirror, a second dichroic mirror, and a material of air or gas. The first dichroic mirror allows only a light beam with a first wavelength to penetrate and reflects light beams with other wavelengths, from the incident light beam. The wide band high-reflection mirror reflects the light beam reflected from the first dichroic mirror within the material, and is positioned such that it is parallel to the first dichroic mirror and is spaced therefrom by a predetermined interval. The second dichroic mirror allows only a light beam with a second wavelength different from the first wavelength to penetrate in a direction that is parallel to the light beam with the first wavelength penetrated through the first dichroic mirror and reflects a light beam with a third wavelength different from the first and second wavelengths within the material. The wide band high-reflection mirror reflects the light beam which is reflected from the second dichroic mirror within material and then the reflected light beam with the third wavelength passes outside the material past the second dichroic mirror in a direction that is parallel to the light beam with the second wavelength penetrated through the second dichroic mirror. The material of air or gas is positioned between the first, second dichroic mirrors and the wide band high-reflection mirror, through which the incident light beam and the reflected light beams proceed.

Apparatus for separating a light beam by using two flat plates with an

A beam path expander for a large-area laser projection display system having a small compacted optical system includes an incidence plane forming an anti-reflection plane to admit light having a specific wavelength into a medium without reflection, a first total reflection plane that is cut into the beam path expander at a total reflection angle determined by the refractive index of the medium for total-reflecting the light admitted from the incidence plane in the medium, a second total reflection plane that is cut into the beam path expander at a total reflection angle for total-reflecting the light reflected from the first total reflection plane at the total reflection angle in the medium, n third total reflection plane(s) (n=0, 1, 2, . . . ) cut into the beam path expander at the total reflection angle for forming a specific light path by total-reflecting the light reflected from the second total reflection plane into the medium and an outlet plane forming an anti-reflection plane to make the light which is reflected from the third total reflection plane exit from the medium. The beam path expanders are positioned between the focusing lens system and modulators and/or between the modulators and the collimating lens system in a large-area laser projection display system.

Compacted beam path expander, a method for expanding beam path and a

A light combining apparatus using a flat plate operating to combine at least two incident light beams entering the flat plate at a first angle with respect to the vertical direction on an incidence plane with wavelengths different from each other. The apparatus comprises a first anti-reflection coating film for allowing only a light beam with a first wavelength to penetrate into the flat plate without reflection, a first wide band high-reflection mirror for reflecting the light beam with the first wavelength which penetrates through the first anti-reflection coating film at a second angle which is different from the first angle, a first dichroic mirror for generating a first combined light beam by allowing only a light beam with a second wavelength different from the first wavelength and reflecting the light beams with other wavelengths and by reflecting the reflected light beam with the first wavelength at the second angle, and for combining the light beam with the second wavelength and the reflected light beam with the first wavelength, a second wide band anti-reflection coating film for allowing the combined light beam to penetrate without reflection; and a material within the flat plate through which the light beam penetrated through the first anti-reflection coating film and the first dichroic mirror and the light beam reflected from the first wide band high-reflection coating film and the first dichroic mirror pass.

Growing community of inventors

Seoul, South Korea

Young Mo Hwang