KR20050116636A - Television capable of controlling center of display unit - Google Patents

Abstract

Disclosed is a television capable of automatically adjusting the center of a screen to correct the center of an image displayed on the screen and the center of the screen automatically in a projection television. An optical sensor is installed at an inner center of the image display unit constituting the projection television, and the optical sensor senses the light scanned through the screen driver and applies it to the microcomputer. The microcomputer controls the scaler by comparing and analyzing a signal applied from an optical sensor. The scaler is moved step by step under the control of a microcomputer, and when the signal value applied from the optical sensor reaches a maximum, the scaler determines the center as the center and displays the scaler at the center of the image display unit.

Description

Television capable of automatically adjusting the center of the screen {Television capable of controlling center of display unit}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection television. More particularly, the center of a screen can be automatically adjusted so that the center of the image displayed on the screen and the center of the screen can be automatically matched. It's about television.

Recently, display devices have become lighter and lighter, as well as large screens, and the demand for projection television receivers is increasing with the implementation of High Definition TeleVision (HDTV) broadcasting. Such a projection television receiver can provide an image of a large screen to a user by enlarging and projecting an image displayed on a screen onto a screen. The projection television receiver includes a Cathode Ray Tube (CRT) projection television receiver, a Liquid Crystal Display (LCD) projection television receiver, and a DLP projection television receiver. Among these projection television receivers, the DLP projection television receiver is equipped with a DMD (Digital Mirror Device) to remove the mosaic of pixels, which is a disadvantage of the LCD projection television receiver employing a conventional thin film transistor (TFT) LCD, and to reproduce primary colors. As a result of improved capability, a wide viewing angle, high contrast ratio, and high brightness and clear large-color images can be obtained, and are currently the most popular among projection television receivers.

1 is a block diagram showing the configuration of a conventional projection television receiver. Here, reference numeral 100 denotes a microcomputer for controlling the overall operation of the projection television, reference numeral 110 denotes an antenna, and reference numeral 120 denotes a tuner section. The tuner unit 120 receives a television broadcast signal of a corresponding channel according to channel selection data output from the microcomputer 100 among the television broadcast signals received through the antenna 110, and also according to the channel selection data. A local oscillation signal is generated and the generated local oscillation signal is mixed with the received television broadcast signal to detect and output a video signal. Reference numeral 130 is a decoder. The decoder 130 decodes a video signal received and output by the tuner unit 120 and extracts a horizontal synchronous signal HS, a vertical synchronous signal VS, a luminance signal Y, and a color signal C. Reference numeral 140 is a scaler unit. The scaler 140 determines a mode of an image signal by HS, VS, Y, and C decoded by the decoder 130, and outputs the output signal of the decoder 130 according to the determined mode. After converting the signal to R, G, and B signals, output it. Reference numeral 150 denotes a memory in which the scaler 140 stores and outputs a signal output from the decoder 130 in accordance with the output format of the HDTV. Reference numeral 160 denotes a screen driver. The screen driver 160 causes the scaler 140 to display a predetermined image on the image display unit 170 according to the R, G, and B signals, and to display the brightness of the predetermined image displayed on the image display unit 170. And color and the like to view a clear image.

In such a projection television receiver, the center of the image and the center of the screen should be adjusted so that the image applied from the screen driver 160 matches the screen of the image display unit 170. However, in the related art, there is a problem in that an error range is generated by setting while watching the eye to match the center of the image with the center of the screen. In addition, there is an inconvenience in that the process is complicated by increasing the number of adjustments to the input by setting while watching the eye.

The present invention has been made to solve the above problems, an object of the present invention is to automatically correct the center of the image (image) displayed on the screen and the center of the screen (automatically) to match automatically To provide a television that can adjust the center of the screen.

In order to achieve the above object, the present invention provides a projection television, comprising: a tuner unit for receiving a broadcast signal; A microcomputer controlling the overall operation of the projection television; A decoder which decodes a video signal of the tuner unit to receive and output a broadcast signal and extracts a horizontal synchronous signal HS, a vertical synchronous signal VS, a luminance signal Y and a color signal C; Scaler that judges the video signal mode by HS, VS, Y and C decoded by the decoder and converts the output signal of the decoder into R, G, B signals according to the output format of HDTV according to the determined mode. part; A screen driver configured to display a predetermined image on the image display unit according to the R, G, and B signals, and to display a clear image by adjusting brightness and color of the predetermined image displayed on the image display unit; And it is installed in the inner center of the image display, and provides a television that can automatically adjust the center of the screen consisting of an optical sensor that detects the light scanned through the screen driver and transmits to the microcomputer.

According to the present invention, an optical sensor is installed at the inner center of the image display unit constituting the projection television, and the optical sensor senses the light scanned through the screen driver and applies it to the microcomputer. The microcomputer controls the scaler by comparing and analyzing a signal applied from an optical sensor. The scaler is moved step by step under the control of a microcomputer, and when the signal value applied from the optical sensor reaches a maximum, the scaler determines the center as the center and displays the scaler at the center of the image display unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a view schematically showing a television that can automatically adjust the center of the screen according to the present invention.

Referring to FIG. 2, the broadcast signal received through the antenna of the projection television is applied to the tuner unit 20, and the overall operation of the projection television is controlled by the microcomputer 80. A decoder 40 is connected to the tuner unit 20, and the decoder 40 decodes a video signal for receiving and outputting a broadcast signal, and outputs a horizontal synchronous signal HS, a vertical synchronous signal VS, a luminance signal Y, and a color signal C. Extract. A scaler 60 is connected to the decoder 40, and the scaler 60 determines a mode of an image signal by HS, VS, Y and C, which are decoded and output from the decoder 40. Accordingly, the output signal of the decoder 40 is converted into R, G, and B signals according to the output format of the HDTV, and then output. A screen driver 62 is connected to the scaler 60, and the screen driver 62 causes the scaler 60 to display a predetermined image on the image display 64 according to R, G, and B signals. The brightness and color of the predetermined image displayed on the image display 64 are adjusted to display a clear image. An optical sensor 66 is installed at the inner center of the image display 64, and the optical sensor 66 detects the light scanned through the screen driver 62 and transmits the light to the microcomputer 80.

Since the optical sensor 66 is installed at the inner center of the image display 64, the microcomputer 80 determines the intensity of light detected by the optical sensor 66. That is, the screen driver 62 scans the light to the image display 64, and the optical sensor 66 senses the light scanned through the screen driver 62 and applies it to the microcomputer 80. The microcomputer 80 determines the intensity of light applied from the optical sensor 66 and controls the scaler 60 to move the scaler 60 by one step in a direction in which the intensity of light increases. Since the scaler 60 moves by one step, the microcomputer 80 continuously compares and analyzes the intensity of the optical signal applied from the optical sensor 66 to determine a position where the maximum intensity of the light is detected. The center will be selected. If the microcomputer 80 is determined to be the center, the scaler 60 does not move and determines that the current display state is the center.

As can be seen from the above description, the present invention installs an optical sensor in the inner center of the image display unit constituting the projection television, and the optical sensor senses the light scanned through the screen driver and applies it to the microcomputer. The microcomputer controls the scaler by comparing and analyzing a signal applied from an optical sensor. The scaler is moved step by step under the control of a microcomputer, and when the signal value applied from the optical sensor reaches a maximum, the scaler determines the center as the center and displays the scaler at the center of the image display unit.

1 is a block diagram showing the configuration of a conventional projection television receiver.

2 is a view schematically showing a television that can automatically adjust the center of the screen according to the present invention.

<Brief description of symbols for the main parts of the drawings>

20: tuner portion 40: decoder

60: scaler 62: screen driver

64: image display unit 66: light sensor

80: microcomputer

Claims (1)

In projection television, A tuner unit for receiving a broadcast signal; A microcomputer controlling the overall operation of the projection television; A decoder which decodes a video signal of the tuner unit to receive and output a broadcast signal and extracts a horizontal synchronous signal HS, a vertical synchronous signal VS, a luminance signal Y and a color signal C; Scaler that judges the video signal mode by HS, VS, Y and C decoded by the decoder and converts the output signal of the decoder into R, G, B signals according to the output format of HDTV according to the determined mode. part; A screen driver configured to display a predetermined image on the image display unit according to the R, G, and B signals, and to display a clear image by adjusting brightness and color of the predetermined image displayed on the image display unit; And And a television mounted on the inner center of the image display and configured to automatically adjust the center of the screen by an optical sensor configured to detect light transmitted through the screen driver and transmit the light to the microcomputer.