KR19980056957A - OSD Brightness Control on Television Receiver - Google Patents

Abstract

The present invention relates to an OSD brightness adjusting device of a television receiver that is capable of adjusting the brightness of an OSD (On Screen Display) output displayed on a cathode-ray tube (CRT). Selection means having a key and a selection key for selecting an automatic OSD brightness adjustment function; a memory means for storing OSD brightness data set by the selection means; and an illumination intensity detection means for detecting an illuminance of a surrounding of a television receiver. And a lookup table in which OSD brightness data is stored according to the illuminance data, and outputting an RGB signal corresponding to the OSD display to be displayed on the CRT according to predetermined data, and corresponding RGB signal according to the input OSD brightness data. OSD generating means configured to change and set the AC level of the control unit; and the OSD generating means based on the OSD brightness data stored in the memory means. And control means for detecting the OSD brightness data from the look-up table based on the illumination data detected by the illumination detection means and controlling the OSD generation means when the OSD brightness automatic adjustment function is set. It features.

Description

OSD Brightness Control on Television Receiver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to an OSD brightness adjusting apparatus of a television receiver, which is capable of adjusting the brightness of an OSD (On Screen Display) output displayed on a cathode-ray tube (CRT).

At present, a television receiver employs an OSD function for visually displaying various operating conditions of a user's remote control operation or a television receiver on a CRT.

1 is a configuration diagram schematically showing a configuration of a television receiver having an OSD function.

In Fig. 1, reference numeral 1 is an antenna for receiving a broadcast frequency signal, 2 is a tuner for tuning a predetermined broadcast channel from a frequency signal received through the antenna 1, and 3 is output from this tuner 2. IF amplification unit for amplifying the intermediate frequency signal (IF), 4 is P / P that separates and outputs the audio intermediate frequency (SIF) and the image intermediate frequency (PIF) from the intermediate frequency signal output from the IF amplifier (3) S separation part.

In the drawing, reference numeral 5 denotes an image detector for detecting a video signal from an image intermediate frequency (PIF) output from the P / S separator 4 and outputting a composite video signal (CV). 6 is an image processor which processes the composite image signal output from the image detector 5 and outputs R (Red), G (Green), and B (Blue) signals corresponding thereto, 7 is the image processor 6 It is a mixer that mixes the RGB signal output from the OSD and the OSD blanking signal (Y ') output from the OSD generator 11 to be described later and outputs it to the CRT (Cathode-ray Tube) drive unit.

In the drawing, reference numeral 9 denotes a remote control device having a plurality of operation keys for the viewer to operate the television receiver, and 10 denotes an infrared signal applied from the remote control device 9 into an electrical code signal corresponding thereto. 11 is an OSD generator for outputting an RGB and OSD blanking signal Y 'for visually displaying the operation state of the remote controller 9 or the operation state of the television receiver on a CRT, and 12 is an OSD. An OSD memory for storing various control data for controlling the generator 11.

Here, the OSD memory 12 stores the caption data generated by the OSD generator 11 and the size, position and color data of the OSD display.

In the drawing, reference numeral 13 denotes a control unit which controls the entire apparatus according to the operation of the remote controller 9.

In the above configuration, when the viewer manipulates the remote control device 9, the control unit 13 controls the circuit unit according to the input operation signal, and the OSD data corresponding to the operation signal from the OSD memory 12. The readout is supplied to the OSD generator 11.

When the OSD data is input from the controller 13, the OSD generator 11 outputs an RGB signal and an OSD blanking signal Y ′ corresponding to the input data and inputs the same to the mixer 7.

On the other hand, the mixer 7 is set to a state in which the RGB signal applied from the image processing unit 6 is output in a normal state, and when the OSD blanking signal Y 'is input from the OSD generating unit 11, this OSD is displayed. Outputs an RGB signal applied from the generator 11.

Therefore, when the RGB and OSD blanking signal Y 'is output from the OSD generator 11 as described above, the corresponding RGB signal is applied to the CRT through the CRT driver 8, thereby outputting a predetermined OSD display on the CRT. .

However, in the above-described television receiver, since the brightness of the OSD output displayed on the CRT is always set to a constant level, when viewing the television receiver in a high illuminance, the viewer may well recognize the OSD display displayed on the CRT. There is problem that becomes impossible.

In addition, when the level of the RGB signal output from the OSD generator 11 is set in consideration of the above circumstances, there is a problem that viewing of the video screen output to the CRT by the corresponding OSD output is disturbed at night. do.

Accordingly, an object of the present invention is to provide an OSD brightness adjusting device for a television receiver, which allows a viewer to arbitrarily set the brightness of an OSD output displayed on a CRT.

In addition, another object of the present invention is to provide an OSD brightness adjusting apparatus of a television receiver, which is capable of automatically adjusting the brightness of an OSD output on a CRT according to the illuminance of the surrounding of the television receiver.

1 is a block diagram showing a television receiver with a conventional OSD function.

Figure 2 is a block diagram showing an OSD brightness adjustment apparatus of the television receiver according to an embodiment of the present invention.

3 is a configuration diagram schematically illustrating a configuration of an OSD generator in FIG. 2.

Figure 4 is a block diagram showing an OSD brightness adjustment apparatus of a television receiver according to another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: antenna 2: tuner

3: IF amplification unit 4: Video / audio intermediate frequency separation unit

5: Image detector 6: Image processor

7 mixer 8 CRT drive unit

10: receiver 21: remote control device

22: OSD memory 23: Illumination detector

24: lookup table 25: OSD generator

26, 42: control unit 40: amplifier

251: Register 253: Video RAM

253: Character generation ROM 254: Shift register

255 to 257: clock buffer 258: AC amplifier

An OSD brightness adjusting apparatus for a television receiver according to the first aspect of the present invention for realizing the above object comprises: selecting means having an adjustment key for adjusting a brightness of an OSD output by a viewer, and OSD brightness data set by the selecting means. Means for storing an output of an RGB signal corresponding to an OSD display to be displayed on a CRT according to predetermined data, and changing and setting an AC level of the corresponding RGB signal according to the input OSD brightness data. And control means for controlling the OSD generating means based on OSD brightness data stored in the memory means.

In addition, the OSD brightness adjustment apparatus of the television receiver according to the second aspect of the present invention is characterized by the selection means having a selection key for the viewer to select the OSD brightness automatic adjustment function and for detecting the illuminance around the television receiver is installed. The illumination detection means, a look-up table storing OSD brightness data according to each illumination data, an RGB signal corresponding to the OSD display to be displayed on the CRT according to predetermined data, and an RGB signal corresponding to the input OSD brightness data OSD generation means for changing and setting the AC level of the RGB signal and the illumination data detected by the illumination detection means detect OSD brightness data from the lookup table, and based on the detected OSD brightness data. It characterized in that it comprises a control means for controlling the OSD generating means.

According to the present invention having the above-described configuration, since the viewer can arbitrarily set the brightness of the OSD displayed on the CRT of the television receiver by operating the remote control device, the viewer can always recognize the OSD display in an optimal state.

In addition, according to the present invention, since the brightness of the OSD display displayed on the CRT is automatically changed and set according to the ambient illumination, the viewer's convenience is greatly improved.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram illustrating an apparatus for adjusting OSD brightness of a television receiver according to an embodiment of the present invention. In FIG. 2, the same reference numerals are given to the same parts as those of FIG. 1, and a detailed description thereof will be omitted.

In FIG. 2, reference numeral 21 denotes a remote control device having a plurality of operation keys for the viewer to operate the television receiver, and in particular, the remote control device 21 is used for adjusting the brightness of the OSD output displayed on the CRT. There is a / down key and an auto adjustment key for selecting auto adjustment of OSD brightness.

In the drawing, reference numeral 22 denotes an OSD memory in which a plurality of control data for controlling the OSD generator 25 are stored, and the brightness of the OSD memory 22, together with the text data, the size and position data of the OSD output, and the brightness thereof. The data will be saved.

In the drawing, reference numeral 23 denotes an illuminance detector for detecting illuminance around the television receiver and outputting illuminance data proportional to the illuminance level, and 24 denotes brightness data of an OSD output corresponding to the illuminance data. Look-up Table

In the drawing, reference numeral 25 denotes an RGB signal for displaying a predetermined OSD according to control data applied from the control unit 26 to be described later, and the AC level of the output RGB signal can be changed and set. An OSD generator 26 is used to control the entire device according to an operation signal applied from the remote controller 21, and in particular, to control the OSD generator 25 to variably control the brightness of the OSD display displayed on the CRT. It is a control unit.

3 is a configuration diagram schematically showing the configuration of the OSD generator 25.

In FIG. 3, reference numeral 251 denotes a register for storing the position, size, and brightness data of the OSD output from the controller 26, and 252 denotes address data corresponding to a character to be output on the CRT applied from the controller 26. And a video RAM for storing color data and sequentially outputting corresponding address data under the control of the OSD control unit 259, which will be described later.

In the drawing, reference numeral 253 denotes a character generation ROM which stores a plurality of character data and outputs character data corresponding to address data applied from the video RAM, and 254 denotes character data output from this character generation ROM 253. Are shift registers which are sequentially shifted out according to the control of the OSD control unit 259.

In the drawings, reference numerals 255 to 257 denote three-state buffers coupled in parallel to the shift outputs of the shift register 254 to output level signals corresponding to R, G, and B, respectively. They are turned on / off in accordance with the gate signal output from the video RAM 252.

In the drawing, reference numeral 258 denotes an AC amplifying unit for AC amplifying and outputting a voltage signal corresponding to RGB output from the three-state buffers 255 to 257 according to a control signal applied from the OSD control unit 259. The OSD control unit controls the entire OSD generating unit 25 based on the OSD control data stored in the register 251, the horizontal synchronizing signal H, the vertical synchronizing signal V, and the OSD clock OSD CLK.

That is, in the OSD generator 25, the OSD controller 259 uses the video RAM 252 based on the size and position data of the OSD output stored in the register 251 and the horizontal and vertical synchronization signals H and V. By controlling the data output timing of the < RTI ID = 0.0 >

In addition, the video RAM 252 controls the color of the OSD display by selectively turning on / off the three-state buffers 255 to 257 based on the color data set by the controller 252.

In addition, the OSD control unit 259 outputs the OSD displayed on the CRT by amplifying the AC level of the RGB signal output from the tri-state buffers 255 to 257 based on the OSD brightness data stored in the register 251. It will control the brightness of.

Next, the operation of the apparatus according to the present invention shown in FIG. 2 will be described.

When the viewer manipulates the brightness up / down keys of the remote controller 21 to adjust the brightness of the OSD output, the controller 26 first reads predetermined OSD data from the OSD memory 22 to generate the OSD. ), An OSD display of a predetermined pattern for adjusting OSD brightness is output on the CRT.

In addition, the brightness of the OSD pattern is set based on reference brightness data stored in the OSD memory 22.

Meanwhile, when the viewer selects the brightness up or the brightness down of the remote control device 21 in the OSD pattern output state, the controller 26 controls the OSD brightness loaded in the register 251 of FIG. 3. The brightness of the OSD output on the CRT is set to a predetermined level by varying the data in predetermined step units according to the viewer's selection.

In addition, the OSD brightness data set as described above is stored in a separate memory and used later to output the OSD display.

On the other hand, when the viewer selects the OSD brightness automatic adjustment key of the remote control device 21 while watching the television receiver, the selection state is set in a separate flag register (not shown). After that, when the viewer needs to output the OSD display by operating the remote controller 21 or the like, first, the lookup table 24 is read based on the illuminance data applied from the illuminance detection unit 23, and the current illuminance is determined. Detects OSD brightness data corresponding to the level, and sets the detected OSD brightness data to a register 251 of the OSD generator 25 to variably set the AC level of the RGB signal output from the OSD generator 25. do.

Therefore, in the above embodiment, the viewer can arbitrarily set the brightness of the OSD displayed on the CRT of the television receiver by operating the remote control device, so that the viewer can always recognize the OSD display in an optimal state.

In addition, according to the embodiment, the brightness of the OSD display displayed on the CRT is automatically changed and set according to the ambient illumination, thereby greatly improving the convenience of the viewer.

In addition, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the technical scope of the present invention.

That is, for example, in the above embodiment, a case has been described in which an AC amplifier unit 258 for amplifying the AC level of the RGB signal output in the OSD generator 25 is provided. As shown, a separate heavy amplifier 40 for amplifying the AC level of the RGB signal output from the OSD generator 11 is provided, and the control unit 42 executes the amplification degree adjustment of the AC amplifier 40. can do.

As described above, according to the present invention, it is possible to realize the OSD brightness adjusting device of the television receiver which can adjust the brightness of the OSD display output to the CRT of the television receiver.

Claims (4)

Selection means having adjustment keys for adjusting the brightness of the OSD output by the viewer, memory means for storing the OSD brightness data set by the selection means, and RGB corresponding to the OSD display to be displayed on the CRT according to predetermined data And outputting a signal and controlling the OSD generating means on the basis of OSD brightness means stored in the memory means and the OSD generating means configured to change and set the AC level of the RGB signal according to the input OSD brightness data. OSD brightness adjustment device, characterized in that it comprises a means. The apparatus of claim 1, wherein the control means outputs a predetermined OSD pattern signal by controlling the OSD generating means when the OSD brightness adjusting key of the selecting means is selected. The apparatus of claim 1, further comprising illuminance detecting means for detecting illuminance around the television receiver, and a look-up table storing OSD brightness data according to the illuminance data. OSD brightness adjustment from the look-up table based on the illuminance data detected by the illuminance detecting means, and the OSD generating means is controlled based on the detected OSD brightness data. Device. 4. The OSD brightness adjusting apparatus for a television receiver as set forth in claim 3, further comprising selecting means having a selection key for the viewer to select an automatic OSD brightness adjustment function.