KR19990012838U - Device that automatically adjusts the brightness of the OSD screen according to the change of the ambient light - Google Patents

Abstract

The present invention relates to a television that automatically adjusts the brightness of a television OSD screen, and more particularly, to an apparatus for automatically adjusting the brightness of a television OSD screen using an EEPROM according to a change in ambient light. On the PIP television, the main screen and sub screen displayed on the receiving hall while the viewer is watching a broadcast program can be controlled by using the remote controller's control button or the control terminal mounted on the television to adjust brightness, contrast, color intensity, and sharpness to the ambient light. Although it can be adjusted and viewed properly, the OSD screen has a visual problem in watching because the brightness, contrast, color density, sharpness, etc. are fixed at a constant and cannot be adjusted according to the change in ambient illumination. The present invention focuses on the above-mentioned problem, and puts an illumination sensor mounted on the system of the television to automatically detect the change of the ambient illumination, and sets value data of the signals constituting the brightness of the OSD screen suitable for the corresponding illumination stored in the EEPROM. By combining the OSD blanking signal and the RGB signal applied from the OSD amplification unit with the change of the ambient light, the OSD screen is automatically adjusted.

Description

Device that automatically adjusts the brightness of the OSD screen according to the change of the ambient light

The present invention relates to a television that automatically adjusts the brightness of the television OSD screen, and more particularly, to an apparatus for automatically adjusting the brightness of the OSD screen by using the EEPROM according to the change in illumination around the television.

In general, a television receives a broadcast signal transmitted from a broadcasting station through an antenna and displays the received signal on the receiving tube. The broadcast signal transmitted from the broadcasting station is a composite video signal modulated by an amplitude modulation method and an audio signal modulated by a frequency modulation method. Is made of. The voice signal is obtained by extracting an FM signal from the received broadcast signal and then detecting the FM signal. The voice signal is amplified and output through a speaker. In addition, the composite video signal may be divided into a synchronization signal and a video signal, and the video signal is divided into a luminance signal and a color signal, and then displayed in a receiving tube after a series of processes.

1 is a block diagram schematically showing an operation of a television having a general PIP function.

Referring to FIG. 1, a main tuner circuit unit which selects a high frequency signal corresponding to a channel to be displayed on a main screen from among high frequency signals received through the antenna 10, converts it into an intermediate frequency, and then amplifies and generates a composite video signal. 20; A main video signal demodulator 70 for demodulating and outputting a composite video signal corresponding to a channel selected by the main tuner circuit 20 to the CRT 90; A sub-tuner circuit unit 30 for selecting a high frequency signal corresponding to a channel to be displayed on a sub-screen among the high frequency signals received through the antenna 10 and amplifying the intermediate frequency to generate a composite image signal through a series of processes; It is connected to the main tuner circuit unit 20 and the external signal input terminal 100, etc., and the PIP signal processing unit 50 or the main image is inputted to each composite image signal applied from the main tuner circuit unit 20 and the external signal input terminal 100. A switching unit 60 having a switching function to be applied to the signal demodulation unit 70; It is connected to the sub-tuner circuit unit 30 and the switching unit 60, and mixes all the composite image signals applied from the sub-tuner circuit unit 30 and the switching unit 60 to restore the main video signal through the switching unit 60 PIP signal processing unit 50 to be applied to the grandfather 70; The main tuner circuit 20, the sub tuner circuit 30, the main video signal demodulator 70, the PIP signal processor 50 and the switching unit 60 are applied from an external button unit (not shown). The micro tuner 40 controls the operations of the main tuner circuit 20, the sub tuner circuit 30, the main video signal demodulator 70, the PIP signal processor 50, and the switching unit 60 according to the signal.

In the television having the PIP function, the microcomputer 40 recognizes this when the viewer selects the multi-screen mode using the screen selection button of the button while watching a broadcast program using the television having the PIP function. A multi-screen signal is applied to the 50, the main video signal demodulator 70 applies an OSD blanking signal corresponding to the number of multi-screens, and the main circuit is applied to the switching unit 60 through the main tuner circuit 20. The video signal is applied to the PIP signal processor 50 so that only the signal applied from the PIP signal processor 50 is applied to the main video signal demodulator 70. The main video signal demodulator 70 applies an OSD screen to the CRT drive 80 by an OSD blanking signal applied from the microcomputer 40 so that the OSD screen is displayed on the screen (CRT) 90, and the switching unit 60 applies all of the multi-screen video signals applied from the PIP signal processor 50 to the main video signal demodulator 70, so that the main video signal demodulator 70 displays the video signals applied from the PIP signal processor 50. Display on the screen. At this time, when a viewer watches a broadcast program displayed on a television and performs operations such as changing a broadcast channel using a remote controller (not shown), the television displays an Arabic numeral-type OSD screen indicating the changed channel. . In this case, the microcomputer 40 applies the OSD blanking signal and the RGB signal to the main video signal demodulator 70, and the main video signal demodulator 70 displays the OSD blanking signal and the RGB signal on the screen (CRT) 90. After amplification to a size suitable for display on the screen (CRT) 90 is displayed. Here, the main screen and the sub screen displayed on the screen (CRT) 90 can be used to control brightness, contrast, color intensity, sharpness, and the like by using a control button of a remote controller or a control terminal (not shown) mounted on a television. It can be adjusted and watched properly, but the OSD screen has constant brightness, contrast, color intensity, and sharpness so that the brightness of the screen is always maintained even when it is dark or bright. There is a problem that causes a disability.

The present invention has been made to solve the above problems, the object of the present invention is to equip the illumination sensor to detect the change in the ambient light in order to adjust the brightness of the fixed TV OSD screen, The present invention provides an apparatus that automatically adjusts the brightness of a television OSD screen suitable for the illumination according to the control signal of the microcomputer using an EEPROM that stores the set value data of signals constituting the brightness of the OSD screen suitable for the illumination.

1 is a block diagram showing the operation of a television having a general PIP function;

Figure 2 is a block diagram of a device for automatically adjusting the brightness of the OSD screen in accordance with the change in the ambient light of the present invention.

Explanation of symbols for main parts of the drawings

10, 100: antenna 20, 300: main tuner circuit

30, 350: sub-tuner circuit 40, 250: microcomputer

50, 400: PIP signal processing unit 60, 450: switching unit

70, 500: Main video signal demodulator 80, 750: CRT drive

90, 800: CRT 150: Ambient light sensor

200: EEPROM 550: Illuminance data input unit

600: mixing unit 650: OSD amplification unit

700: OSD brightness adjustment unit

In order to achieve the above object, the present invention includes a main tuner circuit unit for converting and amplifying a video signal of a selected channel into an intermediate frequency for display on a main screen among high frequency signals received through an antenna; A main video signal demodulator for demodulating and outputting a composite video signal corresponding to a channel selected by the main tuner circuit to be displayed on a CRT; A sub-tuner circuit unit which selects a high frequency signal received through an antenna and displays an image signal on a sub-screen displayed on the screen of the receiver; A switching unit connected to the main tuner circuit unit and configured to switch a complex video signal applied from the main tuner circuit unit to a PIP signal processor or a main video signal demodulator; A PIP signal processing unit connected to the sub-tuner circuit unit and the switching unit and mixing all composite video signals applied from the sub-tuner circuit unit and the switching unit to be applied to the main image signal demodulation unit through the switching unit; And an illuminance sensor mounted on a television system for detecting a change in illuminance of an ambient light, an EEPROM for storing set value data values of signals constituting brightness of an OSD screen suitable for ambient light, and connected to the EEPROM. Reads the set value data of the signals constituting the brightness of the OSD screen suitable for the corresponding illumination, and applies the microcomputer to the illumination data input unit, and amplifies the OSD blanking signal and the RGB signal from the microcomputer to a size suitable for displaying on the CRT. An OSD amplification section comprising: an OSD amplification section, an OSD blanking signal applied from the OSD amplification section, and an OSD brightness adjustment section including a blending section applied to the main image signal demodulation unit by combining the RGB signal and the illumination data output from the illuminance data input section. To adjust the brightness of the OSD screen according to the changes in the illumination around the television. Provide a device for automatic adjustment.

According to the present invention, when a viewer watches a broadcast program on which the multi-screen of the PIP television is displayed, the ambient illumination is sensed by the illumination sensor mounted on the system of the television and applied to the microcomputer, and the microcomputer is stored in the EEPROM. Among the illuminance data, the set value data constituting the brightness of the OSD screen suitable for the illuminance detected by the illuminance sensor is read and applied to the illuminance data input unit, and the OSD amplifying unit applies an OSD blanking signal and an RGB signal. Therefore, the mixing unit connected to the OSD amplification unit and the illuminance data input unit converts the OSD blanking signal applied from the OSD amplification unit and the set value data values constituting the brightness of the OSD screen output from the RGB signal and the illuminance data input unit into signals corresponding to the corresponding illuminance. In combination with the main image signal demodulation unit, an OSD screen suitable for ambient illumination may be displayed.

Figure 2 is a block diagram showing an apparatus for automatically adjusting the brightness of the OSD screen according to the change in the ambient illumination according to the present invention.

Referring to FIG. 2, the high frequency signal received through the antenna 100 is applied to the main tuner circuit 300, and the main tuner circuit 300 is an image of a channel selected to be displayed on the main screen among the high frequency signals. The signal is converted and amplified to an intermediate frequency. A switching unit 450 is connected to the main tuner circuit unit 300, and the switching unit 450 receives a complex video signal applied from the main tuner circuit unit 300 by the main image signal demodulation unit 500 or the PIP signal processing unit 400. Switching function to be applied.

The high frequency signal received through the antenna 100 is applied to the sub-tuner circuit unit 350, and the sub-tuner circuit unit 350 converts and amplifies the high frequency signal applied from the antenna 100 to an intermediate frequency and then composites the image. Will output a signal. PIP signal processing unit 400 is connected to the sub-tuner circuit unit 350 and the switching unit 450, and the PIP signal processing unit 400 is all complex applied from the sub-tuner circuit unit 350 and the switching unit 450. The video signals are mixed and applied to the main video signal demodulator 500 through the switching unit 450. The microcomputer 250 is connected to the main video signal demodulation unit 500, the switching unit 450, and the PIP signal processing unit 400, and the microcomputer 250 has an output port according to a signal applied from a remote controller (not shown). The control signal is applied through O3 to control each operation.

In addition, a change in illuminance around the television is detected by the illuminance sensor 150 and input to the input port I of the microcomputer 250. At this time, the microcomputer 250 reads out the set value data constituting the brightness of the OSD screen suitable for the illuminance detected by the illuminance sensor 150 among the illuminance data stored in the EEPROM and outputs the illuminance data through the output port O2. An OSD blanking signal and an RGB signal are applied to the OSD amplifying unit 650 through the output port O1. Here, the OSD amplification unit 650 connected to the microcomputer 250 amplifies the OSD blanking signal and the RGB signal applied from the microcomputer 250 to a size suitable to be displayed on the CRT 800 and applies them to the mixing unit 600. Done.

In addition, the illuminance data input unit 550 connected to the microcomputer 250 inputs the microcomputer 350 to a set data value constituting the brightness of the OSD screen suitable for the illumination applied through the output port O2 of the microcomputer 250. In accordance with the control signal of the) is applied to the mixing unit 600. Accordingly, the mixing unit 600 connected to the OSD amplifying unit 650 and the illuminance data input unit 550 may display the OSD blanking signal applied from the OSD amplifying unit 650 and the RGB signal and the RGB data and the illuminance data input unit 550. The set value data constituting the brightness of the light source is combined with the signal that is optimally matched to the illuminance, and applied to the main image signal demodulator 500.

According to the present invention, when the viewer switches the power of the television having the PIP function, the video signal, which is a broadcast program received through the antenna 100, is displayed on the CRT 800. In addition, when the viewer views the screen of the television in the state of a single screen and selects a multi screen on which the main screen and the sub screen are simultaneously displayed using the screen selection button of a remote controller (not shown), the screen of the CRT 800 The main screen and several sub screens are displayed on the CRT 800. That is, when the multi-screen is selected by using the screen selection button of the remote controller (not shown), the microcomputer 250 recognizes this and applies the multi-screen signal to the PIP signal processor 400, and the main video signal demodulator 500 The OSD blanking signal corresponding to the number of multiple screens is applied to the main unit, and the main image signal restored through the main tuner circuit unit 300 and the signal applied from the PIP signal processing unit 400 are restored to the switching unit 450. To be applied to the grandfather 500. The main video signal demodulator 500 displays the OSD screen on the CRT 800 by the OSD blanking signal applied from the microcomputer 250, and the switching unit 450 is a multi-screen applied from the PIP signal processor 400. By applying all the video signals to the main video signal demodulator 500, the main video signal demodulator 500 displays the video signals from the PIP controller 400 together with the main video signals from the main tuner circuit 300 on the OSD screen. Display. Therefore, the main screen selected by the viewer and several sub screens are displayed on the CRT 800, and the brightness, contrast, color intensity, and clarity are matched to the ambient light using the control button of the remote controller or the control terminal mounted on the television system. And the like, and the illumination sensor 150 mounted on the system of the television senses the ambient illumination and applies it to the input port I of the microcomputer 250. When the corresponding illuminance signal is applied from the illuminance sensor 150, the microcomputer 250 reads set value data constituting the brightness of the OSD screen suitable for the illuminance stored in the EEPROM 200 and illuminates through the output port O2. The control signal is applied to the data input unit 550 and output to the mixing unit 600. In addition, the microcomputer 250 applies the OSD blanking signal and the RGB signal to the OSD amplifying unit 650 through the output port O1, and the OSD amplifying unit 650 is suitable for display on the CRT 800. The amplification is applied to the mixing unit 600. Therefore, the mixing unit 600 combines the OSD blanking signal and the RGB signal applied from the OSD amplifying unit 650 with the data applied from the illuminance data input unit 550 to match the illuminance, and applies the main image signal demodulator to the viewer. You can watch the OSD screen displayed according to the illuminance.

As described above, the effects of the configuration of the present invention will be described. The main screen and sub screen displayed on the screen (CRT) of the PIP television can be controlled by the viewer using the control buttons of the remote controller or the control terminal (not shown) mounted on the television to adjust brightness, contrast, color intensity, and sharpness. Although the brightness of the OSD, the brightness, contrast, color intensity, and clarity are fixed, the OSD screen maintains its brightness at all times even when it is dark or bright, giving viewers tired eyes. There is a problem that causes visual impairment. The present invention devised in view of the above problems, the illumination sensor mounted on the system of the television to automatically detect the change in the ambient illumination, and the setpoint data and OSD that configure the OSD screen suitable for the corresponding illumination stored in the EEPROM By combining the OSD blanking signal and the RGB signal applied from the amplifying unit, there is an effect of viewing the OSD screen that is automatically matched to the change in ambient illumination.

Claims (2)

A main tuner circuit unit 300 and a sub tuner circuit unit 350 that receive a composite video signal from the antenna 100 of the television; A PIP signal processor 400 for PIP-processing the output video signal of the sub-tuner circuit 350; By switching the switching unit 450, the output signal of the main tuner circuit unit 300 and the output signal of the PIP signal processing unit 400 are input to the CRT drive 750 displaying an image on the CRT 800. A main video signal demodulation unit 500 for transmitting a demodulation signal; A microcomputer 250 for controlling signal processing of the main tuner circuit unit 300, the sub tuner circuit unit 350, the PIP signal processor 400, and the main video signal demodulator 500; And The illuminance sensor 150 mounted on the system of the television detects a change in illuminance of the surroundings and outputs a detection signal to the microcomputer 250, and an OSD screen connected to the microcomputer to match the illuminance of the surroundings. The EEPROM 200 stores the set value data of the signals constituting the brightness and the set value data values of the signals constituting the brightness of the OSD screen suitable for the ambient illumination stored in the EEPROM 200. An illuminance data input unit 550 applied by a control signal, an OSD amplifying unit 650 for amplifying an OSD blanking signal and an RGB signal applied from the microcomputer 250 to a size suitable for displaying on a CRT 800; OSD blanking signal and RGB signal applied from the OSD amplification unit 650 and the illumination data output from the illumination data input unit 550 are combined into a signal that is optimally matched to the illumination. Device for automatically adjusting the brightness of the OSD screen according to the ambient light changes, characterized in that consisting of the OSD brightness adjustment unit 700 consisting of a mixing unit 600 applied to the call demodulation unit (500). The method of claim 1, wherein the microcomputer 250 reads the data from the EEPROM 200, which stores setting data of signals constituting brightness of the OSD screen suitable for the illuminance detected by the illuminance sensor 150. Apparatus for automatically adjusting the brightness of the OSD screen according to the change in the ambient illumination, characterized in that for applying to the illuminance data input unit 550 to apply a control signal to output to the mixing unit 600.