KR20010088019A - Apparatus for displaying laser - Google Patents

Abstract

PURPOSE: A laser display device is provided, which displays images on a screen using a diode array and a rotating mirror to decrease the size of the display device and reduce consumption power. CONSTITUTION: A laser display device includes a controller(40) and a laser array scan module. The controller generates data and a control signal for recognizing the position of a rotating mirror when image data to be projected onto a screen is inputted, and displaying corresponding images on the screen according to position information of the mirror. The laser array scan module controls the position of the mirror based on the control signal generated by the controller, generates laser beams corresponding to the data generated by the controller and projects the laser beams onto the screen.

Description

Laser display device {Apparatus for displaying laser}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser display device, and more particularly, to display an image on a screen using a laser diode array and a rotating mirror, thereby reducing the size of the display device and reducing power consumption. Relates to a device.

In general, an LED billboard using a light emitting diode (LED) is mainly used as a conventional outdoor billboard.

LED is a diode that emits excess energy as light when the injected electrons and holes recombine, and there are red light emitting diodes using GaAsP and green light emitting diodes using GaP. It is used in display, small number / letter display element, light source for optical coupling element, etc.

When these LEDs are used in billboards for outdoor advertising, quite a lot of LEDs are needed except for very small billboards.

Therefore, when manufacturing a large display board, as it is well known as a large number of LEDs, there is a disadvantage that increases the power consumption accordingly.

In addition, if an abnormality is found in the LED, it must be replaced with a new LED every time, so that images, letters, and numbers can be displayed normally, which is difficult to maintain, and also requires a lot of maintenance costs.

In addition, in the case of a large display board, as it is known, a lot of LEDs are required, and the manufacturing cost of the display board is also high, which leads to the difficulty of purchasing a display board at a high price.

Therefore, the present invention has been proposed to solve all the problems that occur when using the existing LED display board as described above,

SUMMARY OF THE INVENTION An object of the present invention is to provide a laser display device capable of reducing the size of a display device and reducing power consumption by displaying an image on a screen using a laser diode array and a rotating mirror. have.

The first embodiment of the present invention for achieving the above object,

A controller for recognizing the position of the rotating mirror and generating data and control signals for displaying the image on the screen according to the position information of the mirror when the image data to be projected on the screen is input;

And a laser array scan module for controlling the position of the mirror according to a control signal generated by the controller, generating a laser light corresponding to the data generated by the controller, and then projecting the laser beam onto a screen.

A second embodiment of the present invention for achieving the above object,

A controller for recognizing the position of the rotating mirror and generating data and control signals for displaying the image on the screen according to the position information of the mirror when the image data to be projected on the screen is input;

Controlling the position of the mirror according to a control signal generated by the controller, generating a laser light corresponding to the data generated by the controller, and then projecting the generated laser light onto a screen through an LCD panel to display an image. It consists of an LCD scan module.

1 is a view showing the structure of a first embodiment of a laser display device according to the present invention,

2 is a view showing the configuration of a first embodiment of a laser display device according to the present invention;

3 is a view showing the structure of a second embodiment of a laser display device according to the present invention;

4 is a view showing the configuration of a second embodiment of a laser display device according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10, 40 ..... controller

20 ..... Laser Array Scan Module

22 ..... Laser Diode Array

30, 60 ..... screen

50 ..... LCD Scan Module

54 ..... Cylindrical Lens

55 ..... LCD Panel

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention according to the technical spirit as described above.

Example 1

1 is a view showing the structure of a first embodiment of a laser display device according to the present invention.

Here, the reference numeral 10, when the image data to be projected on the screen 30 is input, recognizes the position of the rotating mirror, and generates data and control signals for displaying the image on the screen according to the position information of the mirror Represents a controller.

Also, reference numeral 20 controls the position of the mirror according to a control signal generated by the controller 10, generates a laser beam corresponding to the data generated by the controller 10, and then projects it onto the screen 30. A laser array scan module is shown.

2 is a block diagram showing a configuration of a first embodiment of a laser display device according to the present invention.

Here, reference numeral 20 denotes the laser array scan module of FIG. 1, and reference numeral 10 denotes the controller 10 of FIG. 1.

The controller 10 may include an external input unit 11 for receiving data to be displayed and a mirror position sensor 12 for detecting a mirror position using data output from an encoder for detecting a mirror position in the laser array scan module 20. ), And store the data input through the external input unit 11 in the local memory 13, recognize the mirror position information output from the mirror position sensor 12, and mirror position control signal according to the image to be currently displayed Generating a data selection signal and controlling the output of data stored in the local memory 13 and generating a control signal according to the control of the controller 14 to scan the laser array. The control signal generator 15 to be transmitted to the module 20, and the multi-channel to determine the data to be output according to the control signal of the control unit 14 and the control signal generator 15 A buffer to buffer and temporarily store data stored in the lexer 16 and the local memory 13, and transmit image data to be displayed to the laser array scan module 20 according to a selection signal of the multiplexer 16; It consists of a memory 17.

In addition, the laser array scan module 20 includes an automatic power control (APC) unit 21 for stably oscillating a laser according to image data output from the controller 10, and the automatic power. The laser diode array 22 arranged with a plurality of laser diodes for projecting laser light under the control of the controller 21, and the plurality of lasers making the laser light output from the laser diode array 22 into parallel beams. A convex lens unit 23 arranged in a plurality of convex lenses corresponding to a diode, a mirror 24 reflecting a laser beam transmitted by the convex lens unit 23 and scanning the screen 30, and the mirror ( Motor 25 for rotating 24, encoder 26 for detecting the position of the mirror 24, signal detection sensor for outputting the output signal of the encoder 26 as a mirror position value It is composed of 27.

Referring to the operation of the first embodiment of the laser display device according to the present invention configured as described above is as follows.

First, the sensor 27 for detecting a signal in the laser array scan module 20 detects the position of the rotating mirror 24 by the motor 25 rotating at 900 to 1800 rpm to detect the mirror position in the controller 10. To 12.

The mirror position detector 12 transmits the detected mirror position value to the controller 14 and the control signal generator 15, respectively.

In this state, when the user inputs data through the external input unit 11 to display arbitrary characters on the screen 30, the controller 14 stores the data in the local memory 13, and the multiplexer 16 and The control signal generator 15 is controlled to control the display of the corresponding data.

That is, the controller 14 reads the data stored in the local memory 13 according to the input mirror position information and temporarily stores the data in the buffer and the memory 17, and at the position and time to be displayed according to the position information. The control signal generator 15 and the multiplexer 16 are controlled to output the bus.

According to the control, the control signal generator 15 generates an address corresponding to the transmitted mirror position information and transmits the address to the laser array scan module 20, and the multiplexer 16 controls the controller 14 and the control. The image data stored in the buffer and the memory 17 is output to the laser array scan module 20 according to the output signal of the signal generator 16.

That is, the controller 10 transmits the image data to the laser array scan module 20 in correspondence with the position and time for displaying the image.

Then, the automatic power control unit 21 in the laser array scan module 20 selectively selects a plurality of laser diodes in the laser diode array 22 so that the laser is stably oscillated according to the control signal and image data output from the controller 10. Flashes.

The laser diode array 22 selectively flashes a laser diode under the control of the automatic power controller 21 to project the laser light. That is, each laser diode in the laser diode array 22 selectively blinks for a predetermined time at a predetermined position to project the laser light.

The laser beams generated by the plurality of laser diodes are converted into parallel beams by the plurality of convex lenses in the convex lens unit 23 provided in one-to-one correspondence with the plurality of laser diodes, and are transmitted to the mirror 24.

Then, the mirror 24 reflects the incident laser beam to the screen 30 side, thereby displaying the corresponding image on the screen 30.

Here, the position control of the mirror 24 is performed through the control of the motor 25 in the control signal generator 15 in the controller 10.

Meanwhile, as is well known, the signal detecting sensor 27 detects a signal output from the encoder 26 and transmits the signal to the mirror position sensor 12 in the controller 10 as a mirror position information value.

Example 2

3 is a view showing the structure of a second embodiment of a laser display device according to the present invention.

In contrast, reference numeral 40 denotes a position of a rotating mirror when image data to be projected on the screen 60 is inputted, and data and control signals for displaying an image on the screen 60 according to the position information of the mirror. The controller 50 generates a controller, and the reference numeral 50 controls the position of the mirror according to the control signal generated by the controller 40, generates a laser beam corresponding to the data generated by the controller 40, and generates the generated laser beam. It shows an LCD scan module for displaying the image by projecting the laser light on the screen through the LCD panel.

4 is a block diagram showing the configuration of a second embodiment of a laser display device according to the present invention.

Here, reference numeral 50 denotes the LCD scan module of FIG. 3, and reference numeral 40 denotes the controller 40 of FIG. 3.

The controller 40 may include an external input unit 41 for receiving data to be displayed and a mirror position detector 42 for detecting a mirror position with data output from a mirror position sensing encoder in the LCD scan module 50. And store the data input through the external input unit 41 in the local memory 43, recognize the mirror position information output from the mirror position detector 42, and provide a mirror position control signal according to the image to be currently displayed. And a control signal for generating a data selection signal and controlling output of data stored in the local memory 43, and generating a control signal according to the control of the controller 44 to generate the control signal. A control signal generator 45 for transmitting to 50, a multiplexer 46 for determining data to be output according to control signals of the controller 44 and the control signal generator 45, and the local Buffer and temporarily stores data stored in the memory 43, consists of a buffer and a memory (47) for transmitting a scanned LCD module 50 the image data to be displayed according to the selection signal of the multiplexer 46.

In addition, the LCD scan module 50 includes an automatic power control (APC) unit 51 for stably oscillating a laser according to the image data output from the controller 40, and the automatic power control unit. In the laser diode 52 for projecting the laser light under the control of 51, the convex lens 53 for making the laser light output from the laser diode 52 into a parallel beam, and the convex lens 53 Cylindrical lens 54 for converting the parallel beam output to a linear beam and the laser beam output from the cylindrical lens 54 by blinking individually in accordance with the LCD element control signal output from the controller 40 transmitted or LCD panel 55 made up of a plurality of blocking LCD elements, a mirror 56 reflecting a laser beam passing through the LCD panel 55 and scanning the screen 30, and rotating the mirror 56. Motor 57, An encoder 58 for generating a pulse corresponding to the position of the mirror 56, and a signal detection sensor 59 for outputting the output signal of the encoder 58 as a mirror position value.

The operation of the second embodiment of the laser display device according to the present invention configured as described above is as follows.

First, the signal detecting sensor 59 in the LCD scan module 50 detects the position of the mirror 56 that is rotated by the motor 57 that rotates at 900 to 1800 rpm. 42).

The mirror position detector 42 transmits the detected mirror position value to the controller 44 and the control signal generator 45, respectively.

In this state, when the user inputs data through the external input unit 41 to display arbitrary characters on the screen 60, the controller 44 stores the data in the local memory 43, the multiplexer 46 and The control signal generator 45 is controlled to control the display of the corresponding data.

That is, the controller 44 reads the data stored in the local memory 43 according to the input mirror position information and temporarily stores the data in the buffer and the memory 47, and at the position and time to be displayed according to the position information. The control signal generator 45 and the multiplexer 46 are controlled to output the bus.

According to the control, the control signal generator 45 generates an address corresponding to the transmitted mirror position information, and transmits the address to the LCD scan module 50, and the multiplexer 46 controls the controller 44 and the control signal. The image data stored in the buffer and the memory 47 is output to the LCD scan module 50 according to the output signal of the generator 46.

That is, the controller 40 transmits the image data to the LCD scan module 50 in correspondence with the position and time to display the image.

Then, the automatic power control unit 51 in the LCD scan module 50 operates the laser diode 52 so that the laser is oscillated stably according to the control signal and image data output from the controller 40.

Accordingly, the laser diode 52 projects the laser light under the control of the automatic power control unit 51, and thus the laser light generated by the laser diode 52 is converted into the parallel beam in the convex lens 53. do.

The converted parallel beam spreads in the form of a straight beam from the cylindrical lens 54 and is incident on the LCD panel 55.

Here, the LCD panel 55 is provided with a plurality of LCD elements, and controls the blinking of the plurality of LCD elements according to the image to be displayed by the control signal generator 46 in the controller 40.

Therefore, the plurality of LCD elements in the LCD panel 55 pass or block the incident laser beam depending on whether the light is blinking, and the laser beam passing through the LCD panel 55 is incident on the mirror 56. .

The mirror 56 reflects the incident laser beam to the screen 60 side, whereby the image is displayed on the screen 60.

Here, the position control of the mirror 56 is performed through the control of the motor 47 in the control signal generator 46 in the controller 40.

Meanwhile, as is well known, the sensor 59 for detecting a signal detects a pulse output from the encoder 58 and transmits the pulse to the mirror position sensor 42 in the controller 40 as a mirror position information value.

According to the above-described "laser display device" of the present invention, by using a laser diode array method or an LCD panel, it is possible to reduce the size of the product compared to the existing LED sign, and to simplify the structure compared to the existing LED sign, There are a number of advantages, such as reducing power consumption.

Claims (6)

In the video display device, A controller for recognizing the position of the rotating mirror and generating data and control signals for displaying the image on the screen according to the position information of the mirror when the image data to be projected on the screen is input; And a laser array scan module configured to control the position of the mirror according to a control signal generated by the controller, generate a laser light corresponding to the data generated by the controller, and then project a laser array onto a screen. Device. The method of claim 1, wherein the controller, An external input for receiving data to be displayed, a mirror position detector for detecting a mirror position with data output from an encoder for detecting a mirror position in the laser array scanning module, and storing data input through the external input device in a local memory. And a controller for recognizing mirror position information output from the mirror position detector, generating a mirror position control signal according to an image to be currently displayed, generating a data selection signal, and controlling the output of data stored in the local memory. And a control signal generator for generating a control signal according to the control of the controller and transmitting the control signal to the laser array scan module, a multiplexer for determining data to be output according to the control signals of the controller and the control signal generator, and the local memory. Buffer and store stored data Laser display device, characterized in that consisting of a buffer memory and for transmitting to the laser array module scans the image data to be displayed according to the stored, and the selection signal of the multiplexer. The method of claim 1, wherein the laser array scan module, An automatic power control (APC) unit for stably oscillating the laser according to the image data output from the controller, and a laser arranged by a plurality of laser diodes that project the laser light under the control of the automatic power control unit Reflecting a convex lens unit arranged in a plurality of convex lenses corresponding to the plurality of laser diodes to make a diode array, the laser light output from the laser diode array into a parallel beam, and reflects the laser beam transmitted from the convex lens unit And a mirror scanning the screen, a motor for rotating the mirror, an encoder for detecting the position of the mirror, and a signal detecting sensor for outputting the encoder output signal as a mirror position value. Laser display device. In the video display device, A controller for recognizing the position of the rotating mirror and generating data and control signals for displaying the image on the screen according to the position information of the mirror when the image data to be projected on the screen is input; Controlling the position of the mirror according to a control signal generated by the controller, generating a laser light corresponding to the data generated by the controller, and then projecting the generated laser light onto a screen through an LCD panel to display an image. Laser display device comprising an LCD scan module. The method of claim 4, wherein the controller, An external input for receiving data to be displayed, a mirror position detector for detecting a mirror position with data output from an encoder for detecting a mirror position in the laser array scanning module, and storing data input through the external input device in a local memory. And a controller for recognizing mirror position information output from the mirror position detector, generating a mirror position control signal according to an image to be currently displayed, generating a data selection signal, and controlling the output of data stored in the local memory. And a control signal generator for generating a control signal according to the control of the controller and transmitting the control signal to the laser array scan module, a multiplexer for determining data to be output according to the control signals of the controller and the control signal generator, and the local memory. Buffer and store stored data Laser display device, characterized in that consisting of a buffer memory and for transmitting to the laser array module scans the image data to be displayed according to the stored, and the selection signal of the multiplexer. The method of claim 4, wherein the LCD scan module, An automatic power control (APC) unit for stably oscillating the laser according to the image data output from the controller, a laser diode that projects the laser light under the control of the automatic power control unit, and the laser diode A convex lens for converting the laser light output into a parallel beam, a cylindrical lens for converting the parallel beam output from the convex lens into a linear beam, and flashing individually according to the LCD element control signal output from the controller An LCD panel comprising a plurality of LCD elements that transmit or block a laser beam output from a lens, a mirror for reflecting the laser beam passing through the LCD panel and scanning the screen, a motor for rotating the mirror, and the mirror An encoder for generating a pulse corresponding to the position of the encoder and an output of the encoder And a signal detecting sensor for outputting a signal as a mirror position value.