KR100536693B1 - Image display apparatus by using optical modulator - Google Patents

Abstract

The present invention relates to an image display device using an optical modulator, and receives red (R), green (G), and blue (B) image signals, converts them into a form that can be output through the display panel 160, and outputs them. And an image signal processor for receiving a vertical / horizontal sync and generating vertical / horizontal pulses for deflecting the laser beam input to the display panel, and first to third laser beams corresponding to R, G, and B image signals, respectively. A laser generator for scanning a laser beam, a laser beam intensity controller for changing the intensity of each laser beam scanned by the laser generator according to an image signal input from the image signal processor, and expressing the color of the image; A ray incident from the laser generator by changing a reflection index in proportion to a voltage applied to an optical modulator corresponding to the first to third laser beams corresponding to the image signal of B The deflection angle of the optical modulator for deflecting the beam to be scanned to the display panel and the voltage applied to the optical modulator for the optical modulator according to the vertical / horizontal pulses input from the image signal processor are adjusted. It includes a vertical / horizontal deflection part to adjust, and it is easy to control the deflection by using a laser beam with excellent straightness as a light source and an optical modulator for deflection of the laser beam. There is an advantage to ease of implementation.

Description

IMAGE DISPLAY APPARATUS BY USING OPTICAL MODULATOR}

The present invention relates to an image display apparatus using an optical modulator, and more particularly, to an image display apparatus using an optical modulator to emit a fluorescent material of a display panel by deflecting a laser beam using the optical modulator.

CRT, which is most widely used as a display panel, causes the electron beam emitted from the electron gun to deflect the magnetic field generated by the deflection yoke in an appropriate direction, and the bent electron beam passes through the shadow mask to form the red phosphor (R) and the green phosphor on the fluorescent plate. (G) and the blue phosphor (B) are emitted to display an image on the screen.

However, the path of the electron beam adjusted by the control of the magnetic field is difficult to predict, and the deflection control is complicated. In addition, the space until the electron beam reaches the phosphor should be manufactured in a vacuum, and there is a problem in that the vacuum tube serves as an obstacle that makes it difficult to realize a large screen.

The present invention has been proposed to solve such a conventional problem, using a laser beam with excellent straightness as a light source and easy deflection control using an optical modulator for deflection of the laser beam, and the space from the light source to the phosphor to atmospheric pressure It is an object of the present invention to provide an image display device designed to facilitate the implementation of a large screen.

The image display device using the optical modulator according to the present invention for realizing the above object, can receive the red (R), green (G), blue (B) image signal and output through the display panel 160 A video signal processing unit for converting the form into a form and outputting the vertical / horizontal sync to generate vertical / horizontal pulses for deflecting the laser beam input to the display panel; and corresponding to the red, green, and blue image signals A laser generator for scanning the first laser beam, the second laser beam, and the third laser beam, and varying the intensity of each laser beam scanned by the laser generator in accordance with an image signal input from the image signal processor; A laser beam intensity adjusting unit for expressing the color of the image, and corresponding to the first to third laser beams corresponding to the red, green, and blue image signals, respectively. The optical modulator changes the reflection coefficient in proportion to the applied voltage and deflects the laser beam incident from the laser generator to scan the display panel to the display panel, and to the vertical / horizontal pulse input from the image signal processor. Accordingly, a vertical / horizontal deflection portion for adjusting a deflection angle of the laser beam scanned to the display panel by adjusting a voltage applied to the light modulator of the optical modulator.

There may be a plurality of embodiments of the present invention. Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings. This embodiment allows for a better understanding of the objects, features and advantages of the present invention.

1 is a block diagram of an image display apparatus using an optical modulator according to the present invention.

As shown in the drawing, the image display apparatus of the present invention includes an image signal processor 110, a laser beam intensity controller 120, a laser generator 130, an optical modulator 140, and a vertical / horizontal deflector 150. It is configured to include a display panel 160.

The image signal processor 110 receives the red (R), green (G), and blue (B) image signals and converts them into a form that can be output through the display panel 160 to the laser beam intensity controller 120. Outputs the vertical / horizontal sync and generates vertical / horizontal pulses for deflecting the laser beam input to the display panel 160 and transmits them to the vertical / horizontal deflection unit 150.

The laser generator 130 scans the first laser beam, the second laser beam, and the third laser beam corresponding to the red, green, and blue image signals, respectively, toward the light modulator 140.

The laser beam intensity controller 120 changes the intensity of each laser beam scanned by the laser generator 130 according to the image signal input from the image signal processor 110 to express the color of the image. For example, if the image to be displayed on the screen is red when the first laser beam corresponds to red, the second laser beam corresponds to green, and the third laser beam corresponds to blue, the output of the first laser beam is maximized and the second The output of the laser beam and the third laser beam is minimized.

The light modulator 140 scans the display panel 160 by deflecting the laser beam incident from the laser generator 130 by changing the reflection index in the glass in each light modulator in proportion to the applied voltage. To be.

The vertical / horizontal deflection unit 150 adjusts the voltage applied to the individual optical modulators of the optical modulator 140 according to the vertical / horizontal pulses input from the image signal processor 110 and scans the laser to the display panel 160. Adjust the deflection angle of the beam.

2 is a cross-sectional view showing the structure of a display panel according to the present invention.

As shown therein, the display panel of the present invention includes a shadow mask 161, a filter 162, a phosphor 163, and a screen 164.

The three laser beams scanned by the display panel 160 meet each other at the holes of the shadow mask 161 and are alternately scanned in different directions, respectively, and are scanned by the phosphor 163 which is in charge thereof to emit light.

The filter 162 is disposed between the shadow mask 161 and the phosphor 163 to change the laser beam into visible light harmless to the human body.

Phosphor 163 is applied to the screen 164, the laser beam is emitted by the changed visible light to output the image to the display panel 160, the filter 162 and the screen 164 completely from the outside It is shielded to prevent the risk of oxidation in the air.

According to the present invention, it is possible to easily deflect the laser beam by adjusting the applied voltage of the optical modulator, it is possible to easily implement a large screen because the space from the light source to the phosphor is at atmospheric pressure.

In the above description, but limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be included in the technical spirit described in the claims of the present invention.

As described above, the present invention uses a laser beam having excellent straightness as a light source and facilitates deflection control using an optical modulator for deflection of the laser beam, and facilitates the implementation of a large screen by designing the space from the light source to the phosphor at atmospheric pressure. There is one effect.

1 is a block diagram of an image display apparatus using an optical modulator according to the present invention;

2 is a cross-sectional view showing the structure of a display panel according to the present invention.

<Explanation of symbols for main parts of the drawings>

110: image signal processing unit 120: laser beam intensity control unit

130: laser generating unit 140: light modulator

150: vertical / horizontal deflection unit 160: display panel

161: shadow mask 162: filter

163: phosphor 164: screen

Claims (2)

It receives red (R), green (G), and blue (B) image signals and converts them into a form that can be output through a display panel, and outputs a laser beam input to the display panel by receiving vertical / horizontal synchronization. An image signal processor for generating vertical / horizontal pulses for deflection; A laser generator for scanning a first laser beam, a second laser beam, and a third laser beam corresponding to the red, green, and blue video signals, respectively; A laser beam intensity adjusting unit for changing the intensity of each laser beam scanned by the laser generating unit according to an image signal input from the image signal processing unit to express the color of the image; The reflection coefficient is changed in proportion to the voltage applied by the optical modulator corresponding to the first to third laser beams corresponding to the red, green, and blue image signals, thereby deflecting the laser beam incident from the laser generator. An optical modulator for scanning the display panel, Vertical / horizontal deflection unit for adjusting the deflection angle of the laser beam scanned to the display panel by adjusting the voltage applied to the optical modulator according to the vertical / horizontal pulse input from the image signal processor. Image display device using a light modulator comprising a. The method of claim 1, The display panel includes a filter for converting a laser beam corresponding to the red, green, and blue video signals into visible light; A phosphor which is emitted by the visible light while being applied to the screen to output an image on the screen; A shadow mask which causes the visible light corresponding to the red, green and blue video signals to be emitted to the phosphors in charge of the respective light beams Image display device using an optical modulator comprising a.