LASER DISPLAY APPARATUS

• US 20070247690A1
• Filed: 05/18/2006
• Published: 10/25/2007
• Est. Priority Date: 04/21/2006
• Status: Active Grant

• Current Assignee: HB Electronics Co., Ltd.
• Original Assignee: HB Electronics Co., Ltd.
• Inventors: Baik, Haing-Ju
• Granted Patent: US 7,535,613 B2
• Time in Patent Office: Days
• US Class Current: 359/216.100
• CPC Class Codes: G02B 26/105 with one or more pivoting mirrors or galvano-mirrors G02B26/101 takes precedence
• CPC Class Codes: G02B 26/124 Details of the optical system between the light source and the polygonal mirror G02B26/123, G02B26/127 take precedence
• CPC Class Codes: G02B 26/125 Details of the optical system between the polygonal mirror and the image plane G02B26/123, G02B26/127 take precedence; F-Theta lenses G02B13/0005
• CPC Class Codes: G02B 26/126 including curved mirrors
• CPC Class Codes: H04N 9/3129 scanning a light beam on the display screen scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161

Abstract

An improved laser display apparatus is disclosed, which comprises a LED device array in which a plurality of laser diode devices are arranged in a straight shape for thereby scanning a laser diode in accordance with an image signal inputted, with the laser diode devices being designed to generate laser light; a collimation lens which is provided at one side of the LED device array for collimating each laser light scanned from the laser diode devices in parallel in one direction; a condensing unit which is provided at one side of the collimation lens for collimating each laser light, which is collimated in one direction by the collimation lens, through one imaginary focus; and a scanning unit which reflects laser light which transmits through the condensing unit.

Claims

1. In a laser display apparatus which forms an image at a screen by scanning a laser light, an improved laser display apparatus, comprising:

a LED (Light Emitting Diode) device array in which a plurality of laser diode devices are arranged in a straight shape for thereby scanning a laser diode in accordance with an image signal inputted, with the laser diode devices being designed to generate laser light;

a collimation lens which is provided at one side of the LED device array for collimating each laser light scanned from the laser diode devices in parallel in one direction;

a condensing means which is provided at one side of the collimation lens for allowing each laser light, which is collimated by the collimation lens, to transmit through one imaginary focus; and

a scanning means which reflects laser light which transmits through the condensing means.

2. The apparatus of claim 1, wherein said laser diode devices provided at the LED device array scan laser light integrated with red, green and blue colors.

3. The apparatus of claim 1, wherein said LED device array is formed of a very small laser diode wafer or a chip in a rod shape.

4. The apparatus of claim 1, wherein said condensing means is a convex lens or a concave lens so that a laser light, which is collimated in a straight direction by the collimation lens, is converged at one imaginary focus.

5. The apparatus of claim 1, wherein said condensing means is formed of a plurality of plane mirrors corresponding to laser lights which is collimated in a straight direction by the collimation lens, and said plane mirrors are installed so that each laser light is converged at one imaginary focus.

6. The apparatus of claim 1, wherein said scanning means is formed of a rotation polygon mirror or a galvano mirror which linearly reflects laser light scanned from the LED device array.

7. The apparatus of claim 1, further comprising an f-θ

lens provided at one side of the scanning means for allowing a moving speed in left and right directions of the laser light reflected by the scanning means and scanned on a plane screen to be constant.

8. The apparatus of claim 6, wherein said rotation polygon mirror has a rotating polygon column shape, with a scanning mirror being disposed at an outer surface of the rotation polygon mirror for thereby reflecting laser light.

9. In a laser display apparatus which includes a LED (Light Emitting Diode) device array in which a plurality of laser diode devices are arranged in a straight direction for generating laser light for a display of an image by projecting laser generated by a laser diode on a screen, with the LED device array being designed for scanning a laser light in accordance with an image signal, a condenser lens which is provided at one side of the LED device array and allows each laser light scanned from the laser diode devices to transmit through one imaginary focus, and a scanning means for scanning laser light which transmits through the condenser lens, said scanning means of the laser display apparatus, comprising:

a first rotation polygon mirror which linearly reflects laser light scanned from the LED device array;

a swing actuator which is installed in a vertical direction with respect to a rotation shaft of the first rotation polygon mirror; and

a controller which synchronically controls the first rotation polygon mirror and the swing actuator.

10. The apparatus of claim 9, wherein said controller is formed of a central controller, an image controller and a sync controller, and said central controller inputs a signal detected by a polygon mirror position detection sensor into the sync controller and the image controller, respectively, and said image controller receives a video signal and transmits a sync signal to the sync controller and transmits a video signal to the video memory apparatus, and said sync controller receives a control signal of the first rotation polygon mirror and a control signal of the swing actuator for thereby implementing a sync control operation, with the first rotation polygon mirror being formed of a polygon mirror motor, a driver and a motor controller, and with the swing actuator being formed of an actuator, a driver and a waveform generator.

12. The apparatus of claim 9, wherein said controller is formed of a central controller, an image controller and a sync controller, and said central controller inputs a signal detected by a polygon mirror position detection sensor into the sync controller and the image controller, respectively, and said image controller receives a video signal and transmits a sync signal to the sync controller and transmits a video signal to the video memory apparatus, and said sync controller receives a control signal of the first rotation polygon mirror and a control signal of the second rotation polygon mirror for thereby implementing a sync control operation, with the first rotation polygon mirror being formed of a polygon mirror motor, a driver and a motor controller, and with the second rotation polygon mirror being formed of a second motor, a driver and a second motor controller.

11. In a laser display apparatus which includes a LED (Light Emitting Diode) device array in which a plurality of laser diode devices are arranged in a straight direction for generating laser light for a display of an image by projecting laser generated by a laser diode on a screen, with the LED device array being designed for scanning a laser light in accordance with an image signal, a condenser lens which is provided at one side of the LED device array and allows each laser light scanned from the laser diode devices to transmit through one imaginary focus, and a scanning means for scanning laser light which transmits through the condenser lens, said scanning means of the laser display apparatus, comprising:

a first rotation polygon mirror which linearly reflects laser light scanned from the LED device array;

a second rotation polygon mirror which is installed in a vertical direction with respect to a rotation shaft of the first rotation polygon mirror; and

a controller which synchronically controls the first rotation polygon mirror and the second rotation polygon mirror.