KR100800190B1 - TV and method for contemporary controlling contrast and brightness - Google Patents

Abstract

The present invention provides a television receiver and a method which can simultaneously adjust the contrast and brightness of a video screen according to a black value and a white value set through one adjustment process, and the video screen according to the input black value and white value. A first step of setting a screen state adjustment mode for simultaneously adjusting contrast and brightness; A second step of displaying, on the screen, a predetermined luminance bar graphic representing an input white value and a black value when the screen state adjustment mode is set; A third step of setting a black value and a white value by moving the black bar and the white bar constituting the luminance bar graphic according to a black value and a white value input from a user while the predetermined luminance bar graphic is displayed; And a fourth step of simultaneously adjusting contrast and brightness of the video screen according to the set black value and white value.

TV, Contrast, Brightness, Black, White

Description

TV receiver and method for simultaneously controlling contrast and brightness

1 is a block diagram of a television receiver for simultaneously adjusting contrast and brightness according to an embodiment of the present invention.

Fig. 2 is a diagram showing a luminance bar graphic representing black values and white values inputted from a television receiver according to an embodiment of the present invention.

3 is a flowchart of a method for simultaneously adjusting contrast and brightness in a television receiver according to an embodiment of the present invention.

4 is an exemplary view illustrating a process of simultaneously adjusting contrast and brightness in a television receiver according to an embodiment of the present invention.

5 is a graph showing the characteristics of contrast and brightness controlled by a television receiver according to an embodiment of the invention.

Explanation of symbols on the main parts of the drawings

100: TV receiver 101: Tuner

102: broadcast signal processing unit 103: signal separation unit

104: audio decoder 105: video decoder

106: speaker 107: audio processing unit

108: amplifier 109: screen

110: video processing unit 111: storage unit

112: image processor 113: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to a television receiver and a method capable of simultaneously adjusting the contrast and brightness of a video screen according to a black value and a white value set through one adjustment process.

In addition to the rapid development of science and technology, the multimedia field combining various forms of information such as video and audio has become a digital form of information storage and existence in the rapid development of information and communication. Due to the development of MPEG technology, which is a compression standard for moving picture data for compressing digital video data that requires relatively large amounts of data, the size of digital video data is gradually getting smaller. Digital video and audio services have been provided in all fields, and digital devices for providing such services have emerged.

Among them, broadcasting and TV occupy an important place as an easy and effective information transmission medium in daily life, and thanks to the digital technology described above, video data and audio data are compressed and transmitted by MPEG technology, thereby adding a large amount of information. With the advent of digital TV, which can provide fast and reliable, more broadcasts can be easily enjoyed at home with clearer picture quality and more vivid sound. Accordingly, various techniques for providing clear image quality have been proposed. For example, Korean Patent Application No. 2001-0051722 implements a dimming circuit using a combination of a burst dimming method and a linear dimming method. It proposes a technique that can block the occurrence of the frequency interference phenomenon by varying.

In addition, Korean Patent Application No. 2001-0047742 proposes a technique for detecting the degree of brightness of the lamp and properly compensating the contrast and brightness to prevent image quality deterioration due to the decrease in brightness.

However, when adjusting the contrast and the brightness of the video screen as described above, there was a need to separately perform the contrast adjustment process and the brightness adjustment process.

The present invention has been made to solve the above problems, an object of the present invention is a television receiver that can simultaneously adjust the contrast and brightness of the video screen according to the black value and the white value set through a single adjustment process and Provide a method.

Another object of the present invention is to provide a television receiver and method that can significantly reduce the time required for setting the video screen by simultaneously adjusting the contrast and brightness of the video screen through one adjustment process.

The present invention for achieving the above object, the storage means for storing a (Luminace) bar graphics for setting the input white value and black value; According to the screen condition control command input from the user, the control unit displays the luminance bar graphic stored in the storage means, and according to the black value and the white value set through one setting process from the user on the displayed luminance bar graphic. Control means for outputting a control signal such that brightness and contrast of an image screen are simultaneously adjusted; Image processing means for processing the image signal input from the outside in accordance with the control signal of the controller to display, and to adjust the brightness and contrast of the image screen based on the black value and the white value set through the screen state setting process ; And display means for displaying a corresponding video signal according to the brightness and contrast adjusted through the image processing means.

The present invention provides a display device comprising: a first step of setting a screen state adjustment mode for simultaneously adjusting contrast and brightness of an image screen according to an input black value and a white value; A second step of displaying, on the screen, a predetermined luminance bar graphic representing an input white value and a black value when the screen state adjustment mode is set; A third step of setting a black value and a white value by moving the black bar and the white bar constituting the luminance bar graphic according to a black value and a white value input from a user while the predetermined luminance bar graphic is displayed; And a fourth step of simultaneously adjusting contrast and brightness of the video screen according to the set black value and white value.

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

1 is a block diagram of a television receiver for simultaneously adjusting contrast and brightness according to an embodiment of the present invention.

Referring to FIG. 1, the television receiver 100 of the present invention includes a tuner 101 for tuning a plurality of broadcast channels received through different frequencies from a plurality of broadcast stations, and received through the tuner 101. After the analog broadcast signal is demodulated, the broadcast signal processor 102 for converting the demodulated analog broadcast signal into a digital broadcast signal and the digital broadcast signal converted by the broadcast signal processor 102 are separated into an audio signal and a video signal. Decoding the video signal separated by the signal separator (DEMUX) 103, the audio decoder 104 for decoding the audio signal separated by the signal separator 103, and the signal separator 103 Video decoder 105, a speaker 106 for outputting an audio signal to the outside, and an audio signal for making the audio signal decoded by the audio decoder 104 into an electrical signal suitable for the speaker 106. An error processing unit 107 and an amplifier 108 for amplifying and outputting an electric signal output from the audio processing unit 107 to the speaker 106 are provided.

The television receiver 100 of the present invention includes a screen 109 for displaying an image, and a video processor for making a video signal decoded by the video decoder 105 into a signal form suitable for the screen 109. 110, a storage unit 111 for storing various information and storing predetermined menu items, and an image signal input from the video processor 110 on the screen 109, and simultaneously set black values and white values. The image processing unit 112 for adjusting the contrast and brightness of the video screen output to the screen 109 according to the value, and control the reception and output of the broadcast signal, and the white value and the black value input through the remote control, etc. Set at the same time to the image processor 112, and control the image processor 112 to adjust the brightness and contrast of the image screen according to the set white value and black value The control unit 113 is provided.

The storage unit 111 is a storage medium for storing various kinds of information, and may be implemented as a memory device such as RAM or EEPROM or a hard disk driver (HDD). An execution program for controlling reception and output of a broadcast signal, an editing program for a favorite channel, an automatic channel program, and the like are set in the 111, and an execution program for simultaneous adjustment of contrast and brightness according to the present invention is set. Additional information for carrying out the invention is stored. Here, the additional information stores graphic information for setting white values and black values, for example, a luminance bar graphic as shown in FIG. 2.

The image processor 112 is set by the main image module 112-1 and the controller 113 to output the video signal input from the video processor 111 to the screen 109 under the control of the controller 113. White values set by the brightness module 112-2 and the controller 113 for adjusting the brightness of the image signal output to the screen 109 by the main image module 112-1 according to the black value. A screen set by the contrast module 112-3 and the control unit 113 for adjusting the contrast of the video signal output to the screen 109 by the main video module 112-1 according to the difference between the black value and the black value. OSD screen for adjusting the size of the screen output on the screen 109 by the main image module 112-1 according to the size value, and various information input from the control unit 113 OSD module 112-5 for processing to the screen 109 It has a software function, etc. In addition to these functions, it has various software functions for video signal processing. Although the present invention is implemented such that all of these software functions are provided in the image processing unit 112 implemented as one chip, the present invention is not limited thereto, and the software functions as described above may be implemented in a chip other than the image processing unit 112. May be

When the black value input by the user is set by the controller 113, the brightness module 112-2 controls the brightness of the video screen according to the set black value under the control of the controller 113.

When the black value and the white value input by the user are set, the contrast module 112-3 obtains the difference value between the set black value and the white value under the control of the control unit 113, and then contrasts the image screen according to the difference value. Adjust However, in the present invention, since the black value and the white value are set at the same time, the brightness and contrast adjustment by the brightness module 112-2 and the contrast module 112-3 are performed at the same time.

When the menu item or the luminance bar graphic stored in the storage 111 is transmitted by the controller 113, the OSD module 112-5 may be controlled by the controller 113 to display the menu item or the luminance bar graphic. It is processed as an OSD screen and output to the screen 109.

The controller 113 controls channel tuning of the tuner 101 according to a channel selected through a remote controller, controls reception and output of a broadcast signal according to a user command, and controls various types of information stored in the storage 111. The broadcast signal processor 102 according to the control of the main control module 113-1 and the main control module 113-1 for controlling the display and setting the black value and the white value, and controlling the contrast and brightness of the video screen. Decoding to control the decoding process of the audio decoder 104 and the video decoder 105 under the control of the broadcast signal control module 113-2 and the main control module 113-1 for controlling demodulation and signal conversion And a software function such as an image control module 113-4 for controlling the image processing of the image processor 112 under the control of the control module 113-3 and the main control module 113-1. In addition to receiving and broadcasting broadcasts It has various software functions for input and output. Although the present invention is implemented such that all of the software functions are provided in the control unit 113 implemented as one chip, the present invention is not limited thereto and the software functions as described above may be implemented in a chip other than the control unit 113. have.

The main control module 113-1 controls the tuner 101 to tune a channel input by a user through a remote controller, and screens menu items stored in the storage 111 when a menu button on the remote controller is pressed by the user. The display unit 109 outputs the luminance bar graphic stored in the storage unit 111 to the screen 109 when a screen state adjustment command is input by the user. Here, the main control module 113-1 reads the menu items or the luminance bar graphic stored in the storage unit 111 and transfers them to the image control module 113-4. OSD module 112-5 to output the menu items or the luminance bar graphic of the image to the OSD module 112-5 of the image processing unit 112 and simultaneously display certain menu items or the luminance bar graphic on the screen 109. ). Accordingly, the OSD module 112-5 of the image processor 112 processes the menu items or the luminance bar graphic input from the controller 113 as an OSD screen and displays them on the screen 109.

In the state in which the luminance bar graphic as shown in FIG. 2 is displayed, the user presses a button on the remote control, for example, an arrow button to move a white bar and a black bar to input a white value and a black value. When pressing to instruct the movement of the white bar or the black bar, the main control module 113-1 moves the black bar or the white bar up and down by a predetermined distance on the luminous bar every time the arrow button is pressed. At this time, the main control module 113-1 transmits the movement control signal of the black bar or the white bar to the image processing unit 112 through the image control module 113-4, and then the OSD module 112-of the image processing unit 112. 5) moves the black bar or the white bar displayed on the screen 109 according to the movement control signal.

The black bar and white bar moved through the arrow buttons on the remote control indicate the black value and the white value, respectively. That is, the user inputs the black value and the white value by pressing the arrow buttons on the remote control. The value is shown to the user via a luminous bar graphic displayed on screen 109. Therefore, when the user inputs a black value and a white value by pressing an arrow button on the remote controller, the main control module 113-1 moves the black bar and the white bar by the input black value and the white value and simultaneously inputs the black value and the white value. The brightness module 112-2 and the contrast module 112-3 of the image processor 112 are set respectively. Of course, the black value and the white value are set by the image control module 113-4.

In the process of setting the black value and the white value as described above, if the black value or the white value input from the user exceeds a predetermined threshold, the main control module 113-1 ignores the exceeded black value or the white value, Set the threshold to black or white.

The image control module 113-4 receives a black value, a white value, or a screen size value from the main control module 113-1 and simultaneously inputs a control command for instructing to re-adjust the image. Reset to the brightness module 112-2 of 112 to control the brightness again, and control to re-adjust the contrast by resetting the input white value to the contrast module 112-3 of the image processor 112 Alternatively, the screen size value is reset to the screen module 112-4 of the image processor 112 to control the screen size. In addition, the image control module 113-4 controls to output various types of information transmitted by the main control module 113-1 to the OSD module 112-5 of the image processor 112 and to display the information on the screen 109. do.

Referring to the flowchart, a process of simultaneously adjusting the brightness and contrast of the video screen according to the black and white values set by the user with the television receiver of the present invention having the above-described configuration and function will be described below.

3 is a flowchart illustrating a method for simultaneously adjusting contrast and brightness in a television receiver according to an embodiment of the present invention.

Referring to FIG. 3, when a user presses a menu button on the remote controller, as shown in FIG. 4, the television receiver 100 displays certain top-level menu items including screen adjustment items on the screen 109 (see FIG. 4). S301). In this process, the television receiver 100 processes and displays predetermined menu items on the OSD screen. If a hot key for selecting a screen condition adjustment item is attached to the remote controller, the user may select a screen condition control item by pressing a hot key on the remote controller without using a menu button.

When the user selects a screen condition adjustment item using a remote controller while the predetermined top menu items are displayed (S302), the television receiver 100 displays the contrast and the brightness of the video screen according to the black and white values input by the user. A screen state adjustment mode for simultaneously adjusting the varnish is set (S303), and a luminance bar graphic for inputting a black value and a white value is processed as an OSD screen and displayed on the screen 109 (S304). In the display process, as shown in FIG. 2, the luminous bar graphic includes a white bar and a black bar displayed on one side of the luminous bar displayed in a vertical direction and a luminous bar indicating a white value and a black value. The black bar is located above the luminous bar and the black bar is located below the luminous bar.

Looking at the movement characteristics of the luminance bar graphic, when the user inputs a white value by pressing a button on the remote control, for example, an arrow button, the white bar moves in the up and down direction, but the 촤 of the luminance bar indicating the threshold of the white value is displayed. Move up and down between the top and the middle of the luminous bar, and when the user presses the arrow button on the remote control to input the black value, the black bar also moves up and down, but the lower right of the luminous bar indicating the threshold of the black value And move up and down between the middle part of the luminous bar.

When the luminance bar graphic is displayed, when the user inputs a black value and a white value using the remote controller (S305), the television receiver 100 moves the black bar on the luminance bar by the input black value and inputs the input white value. The white bar is moved on the luminous bar by the amount (S306). At this time, if the input black value is higher than the currently set black value, the television receiver 100 moves the black bar upwards, and conversely, if the input black value is lower than the currently set black value, the television receiver 100 uses the black bar. Move downward Similarly, if the input white value is higher than the currently set white value, the television receiver 100 moves the white bar upward. If the input white value is lower than the currently set white value, the television receiver 100 uses the white bar. Move downward

When the black value and the white value are input by the user in this way, the television receiver 100 sets the input black value and the white value (S307), adjusts the brightness of the video screen according to the set black value, and also sets the value. After obtaining a difference value between a black value and a white value, the contrast of the video screen is adjusted according to the difference value (S308).

In the adjusting process (S308) of the video screen, the characteristics of the brightness and contrast which are changed according to the black value and the white value newly set in the television receiver 100 will be described in more detail with reference to the graph shown in FIG. same.

5 is a graph showing the characteristics of contrast and brightness controlled by a television receiver according to an embodiment of the present invention.

As shown in FIG. 5, when the black value newly set in the television receiver 100 is increased than the previous black value, the graph representing the brightness characteristics is horizontally moved upwards, and vice versa. When the black value is decreased, the graph representing the brightness characteristics is horizontally shifted downward.

In addition, when the difference between the black value and the white value newly set in the television receiver 100 increases than the previous difference value, the slope of the graph indicating the contrast characteristic is increased, and conversely, the difference value between the newly set black value and the white value is increased. If the difference is smaller than the previous difference value, the slope of the graph representing the contrast characteristic becomes smaller.

Meanwhile, in FIG. 5, the threshold 100% is a threshold of the white value. When the white value input by the user is greater than or equal to the threshold, for example, when the white value 110% is input, the television receiver 100 exceeds the threshold 100%. Ignore the white value and set the white value 100%.

In addition, in FIG. 5, the threshold 0% is the threshold of the black value. When the black value input by the user is less than the threshold, for example, when the black value -10% is input, the television receiver 100 is lower than the threshold 0%. Ignore the black value and set the black value 0%.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, the present invention can facilitate user convenience by simultaneously adjusting the contrast and brightness of the video screen according to the black value and the white value set through one adjustment process.

Claims (9)

Storage means for storing a luminance bar graphic for setting an input white value and a black value; According to the screen condition control command input from the user, the control unit displays the luminance bar graphic stored in the storage means, and according to the black value and the white value set through one setting process from the user on the displayed luminance bar graphic. Control means for outputting a control signal such that brightness and contrast of an image screen are simultaneously adjusted; Image processing means for processing the image signal input from the outside in accordance with the control signal of the controller to display, and to adjust the brightness and contrast of the image screen based on the black value and the white value set through the screen state setting process ; And, And display means for displaying a corresponding video signal according to the brightness and contrast adjusted by said image processing means. delete The method of claim 1, The luminance bar graphic includes a luminance bar indicating a white value and a black value, and a white bar and a black bar displayed on one side of the luminance bar displayed in a vertical direction. The white bar is located above the luminous bar and is moved up and down between the upper end and the middle portion of the luminous bar, And the black bar is located below the luminous bar and is moved up and down between the lower end and the middle portion of the luminous bar. The method according to claim 1 or 3, The image processing means adjusts the brightness according to the black value newly set by the control means, and adjusts the contrast according to the difference value between the black value and the white value newly set by the control means. . A first step of setting a screen state adjustment mode for simultaneously adjusting contrast and brightness of an image screen according to input black and white values; A second step of displaying, on the screen, a predetermined luminance bar graphic representing an input white value and a black value when the screen state adjustment mode is set; A third step of setting a black value and a white value by moving the black bar and the white bar constituting the luminance bar graphic according to the black value and the white value input from the user on the luminance bar graphic; And And simultaneously adjusting the contrast and the brightness of the video screen according to the set black and white values. delete The method of claim 5, wherein In the third step, The white bar is horizontally moved up and down between an upper end and a middle portion of the luminous bar forming the luminous bar graphic, And the black bar is horizontally moved up and down between a lower end and a middle part of the luminous bar. The method according to any one of claims 5 and 7, In the fourth step, Adjusting the brightness according to the set black value, the contrast is adjusted according to the difference between the set black value and the white value method of controlling the contrast and brightness in a television receiver. The method according to any one of claims 5 and 7, In the third step, If the input black value is less than the first predetermined threshold, the input black value is ignored and the first threshold is set as the new black value. And when the input white value exceeds a predetermined second threshold, ignores the input white value and sets the second threshold to a new white value.

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