KR100771605B1 - Display device and method for correcting linearity distortion thereof - Google Patents

Abstract

The present invention relates to an imaging device and a linearity correction method. According to the present invention, a tuner unit tunes a broadcast channel selected by a user, decodes and scales a broadcast signal tuned by the tuner, and stores a linearity adjustment pattern for adjusting linearity distortion of an image. A deflection control unit for performing horizontal and vertical deflection of the processed image signal, a display unit for displaying the deflection-controlled R, G and B image, and horizontal and vertical lines for adjusting linearity in the signal processing unit Stores the gap value, provides the signal processing unit with the interval value of the vertical and horizontal lines stored in the memory unit, and transmits a control command for adjusting the interval of the vertical and horizontal lines displayed through the display unit to the signal processing unit It provides a video device characterized in that it comprises a control unit. Therefore, according to the present invention, the deflection distortion of the slim TV can be corrected, thereby preventing or minimizing the linearity distortion of the screen.

Screen distortion, linearity

Description

Image device and method for correcting linearity distortion thereof

Figure 1 shows the overall length of a 32-inch general TV

2 shows the full length of a 32-inch Super Slim TV.

3 is a view for explaining the deflection angle of the conventional CRT TV and the deflection angle of the super slim TV.

4 and 5 are views for explaining the linearity distortion according to the prior art.

6 is a block diagram illustrating a video device according to the present invention.

FIG. 7 is a diagram for describing the signal processing unit illustrated in FIG. 6 in detail.

8 is a view for explaining a linearity adjustment test pattern according to the present invention.

9 is a flowchart for explaining a linearity correction method of an imaging apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

110: tuner unit 120: signal processing unit

121: signal processing controller 122: adjustment pattern memory unit

123: temporary memory section 124: D / A conversion section

130: deflection control unit 140: display unit

150: memory unit 160: OSD processing unit

170: control unit

The present invention relates to linearity correction of an imager, and more particularly, to an imager suitable for correcting linearity distortion that may occur in an imager and a method of correcting linearity distortion thereof.

Broadcasting is a mass media that targets an unspecified number, which is advantageous because it can be compressed like computer data compression because all elements (video, audio, data) are treated digitally.

Therefore, in the case of digital method, one program of HDTV class and three or more programs of SDTV class can be transmitted to one analog channel, and digital signal transmission and processing make it possible to enjoy much clearer screen. In addition, the screen overlap (ghost) phenomenon, in which radio waves are reflected on obstacles, can be solved on its own, and HDTV channels can enjoy realistic screens and stereoscopic sound at home.

HDTV (High Definition TV) and SDTV (Standard Definition TV) are determined by how many pixels. Generally, HDTV is about 1920 × 1080 (approximately 2 million) pixels in width × length and about 1/5 in SDTV. 400,000 or so.

In case of aspect ratio, SDTV uses 4: 3 or 16: 9, and in case of HDTV, it has 16: 9 aspect ratio.

Recently, digital imaging has been applied to various devices such as CRT, projection TV, LCD, and PDP. Such LCDs and PDPs have the advantage of being considerably thinner than CRTs or projection methods. However, there is still a problem that the price is quite expensive.

As a result, CRT TVs adopting a slim picture tube (CPT: Color Picture Tube), which are about half the price in a similar size, are in the spotlight.

As the slim TV becomes more and more slim, the overall length of the CRT becomes shorter and the deflection angle becomes wider. At this time, when the deflection angle becomes wider, the distortion of the screen appears severely.

Hereinafter, an imaging apparatus according to the prior art will be described with reference to the accompanying drawings.

FIG. 1 is a diagram showing the overall length of a 32-inch TV, FIG. 2 is a diagram showing the full length of a 32-inch super slim TV, and FIG. 3 is a diagram showing a deflection angle of a general CRT and a super slim TV. .

1 to 3, the overall length of the 32-inch general TV is 60 cm, the total length of the 32-inch super slim TV is 39 cm. On the other hand, the deflection angle of general CRT TV is 110˚ and the super slim TV is 125˚.

As described above, the slim TV currently produced has a CRT shorter than 20 mm compared to the conventional TV, and as a result, the deflection angle of the screen is severely increased. The distortion phenomenon includes linearity distortion and pin cushion.

4 and 5 are diagrams for explaining linearity distortion according to the prior art, FIG. 4 is a normal case, and FIG. 5 illustrates a case where linearity distortion is generated on a screen.

Herein, the linearity distortion is more severe in the upper and lower sides of the screen, especially in the case of 16: 9 screen, rather than the center of the screen.

The reason is because of the characteristics of the cathode ray tube (CRT) of the display device. The cathode ray tube focuses and accelerates the electrons emitted from the R / G / B electron gun, and then the R / G / B fluorescent surface is exposed through a shadow mask. The pixel is formed by colliding with each other and a current is passed through the vertical and horizontal deflection coils to form a two-dimensional screen.

However, screen distortion occurs due to a deviation between the distance from the electron gun to the center of the screen and the distance to both sides of the screen. In other words, since the distance from the electron gun to both sides of the screen is relatively long, the width of the horizontal and vertical cross-hatches on the screen is not constant and distortion of the screen occurs. Therefore, the disadvantage of such a CRT is to reduce the distance between the electron gun and the screen and to limit the TV's Super-Slim type.

Of course, in the production of super slim TV, the linearity is adjusted through deflection processing in the line process, but the user actually sees it due to the heat run state of the TV in the production line, the deviation of the adjuster, and the deviation between parts. Complaints are caused by poor linearity. In addition, the user cannot directly improve the dissatisfaction with the linearity, and there is inconvenience in that the user must take the inconvenience and watch TV or request a separate A / S.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a video device and a method for correcting linearity distortion thereof, which allows a user to directly correct linearity distortion of a screen.

In order to achieve the above object, the present invention provides a tuner unit for tuning a broadcast channel selected by a user, decoding and scaling on a broadcast signal tuned by the tuner unit, and storing a linearity adjustment pattern for adjusting linearity distortion of an image. A signal processor, a deflection control unit for performing R, G, and B horizontal and vertical deflection of the image signal processed by the signal processing unit, a display unit for displaying the deflection-controlled R, G, and B images, and linearity adjustment in the signal processing unit Control for storing the horizontal and vertical line spacing values, providing the signal processing unit with the vertical and horizontal line spacing values stored in the memory unit, and adjusting the vertical and horizontal line spacing displayed through the display unit. Providing a video device comprising a control unit for transmitting a command to the signal processing unit All.

The signal processor may be configured to: decode the broadcast signal transmitted from the tuner unit, and process the scaling through the temporary memory unit to display the video signal at a resolution set by the display unit; An adjustment pattern memory unit for storing a linearity adjustment pattern that is displayed in a screen display form and can be adjusted by a user, a temporary memory unit for temporarily storing an image signal transmitted from the tuner unit and performing image scaling, and the temporary memory unit It is preferably configured to include a digital / analog converter for outputting a digital / analog conversion of the video signal subjected to the scaling.

In the linearity adjustment pattern, a plurality of vertical and horizontal lines are formed in a cross hatch form on the display unit, and an identifier is assigned to each of the plurality of vertical and horizontal lines.

In addition, the imaging apparatus preferably further includes a separate memory for the interval value of the vertical and horizontal lines of the screen adjusted in the production line or the interval value of the vertical and horizontal lines newly adjusted by the control command.

The control command transmitted by the controller to the signal processor is preferably input through a keypad of a remote controller for remotely controlling the video device.

In order to achieve the above object, the present invention also selects a menu function through a remote control, and then selecting a linearity adjustment item in the menu function to display a plurality of vertical and horizontal lines in the cross hatch form on the display unit of the video device. Step, selecting the vertical or horizontal lines to be adjusted through the keypad of the remote control, and moving the corresponding line in the desired direction to adjust the linearity in the vertical or horizontal direction, when the linearity adjustment is completed, the corresponding vertical and horizontal lines It provides a method for correcting the linearity distortion of a video device, comprising the step of storing the interval of, and adjusting and displaying the newly adjusted vertical and horizontal intervals when decoding and scaling the input video signal.

The adjusting of the linearity may include selecting the vertical or horizontal lines through the numeric keys of the remote controller and moving the selected lines in a desired direction by using one or more of the volume and channel adjustment keys of the remote controller. It is preferable.

Therefore, according to the present invention, it is possible to prevent linear distortion of the screen which may occur in the imaging apparatus.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described.

FIG. 6 is a block diagram illustrating an image device according to the present invention, FIG. 7 is a view for explaining the signal processing unit shown in FIG. 6, and FIG. 8 is a view for explaining a linearity adjustment pattern according to the present invention. to be.

The imaging apparatus according to the present invention includes a tuner 110, a signal processor 120, a deflection controller 130, a display 140, a memory 150, and a controller 160.

The tuner 110 tunes to a broadcast channel selected by a user.

The signal processor 120 decodes the broadcast signal tuned by the tuner 110, scales the decoded video signal according to the output resolution of the display 140, and provides vertical and horizontal line spacing values provided by the controller 160. And adjusts the linearity according to and stores the linearity adjustment pattern for adjusting the linearity distortion of the image to be displayed.

The deflection control unit 130 performs R, G and B horizontal and vertical deflection of the image signal processed by the signal processing unit 120 to display the R, G and B images through the display unit 140.

The display 140 displays deflection controlled R, G, and B images.

The memory unit 150 stores the interval values of the vertical and horizontal lines of the screen adjusted in the production line, or stores the interval values of the vertical and horizontal lines of the screen newly adjusted by the user. In other words, the memory unit 150 may be configured as a read / write memory.

The OSD processor 160 processes the linearity adjustment pattern as shown in FIG. 8 to be displayed on the display 140.

The control unit 170 provides vertical and horizontal values stored in the memory unit 150 when adjusting the linearity in the signal processing unit 120 and according to a control command from the user through the remote controller 200 for remotely controlling the video device. The control command for adjusting the linearity adjustment pattern of the signal processor 120 is transmitted to the signal processor 120. The memory unit 150 is configured separately from the controller 170, but may use a memory area within the controller 170.

The signal processing unit 120 includes a signal processing control unit 121, an adjustment pattern memory unit 122, a temporary memory unit 123, and a digital / analog converter 124.

The signal processing controller 121 decodes the broadcast signal transmitted from the tuner unit 110 and scales the image signal through the temporary memory unit 123 so that the image signal can be displayed at the resolution set by the display unit 140.

The adjustment pattern memory 122 stores the linearity adjustment pattern illustrated in FIG. 8, which may be displayed on the display 140 in the form of an OSD and adjusted by a user.

The temporary memory unit 123 temporarily stores an image signal transmitted from the tuner unit 110 and performs image scaling.

In addition, the D / A converter 124 digitally / analog converts the image signal subjected to scaling and outputs the digital signal.

In this case, the linearity adjustment pattern has vertical and horizontal lines formed in a cross hatch form on the display unit 140 as shown in FIG. 8, and has a unique identifier (eg, a number) for each of the vertical and horizontal lines. Is displayed.

According to the display form of the linearity adjustment pattern, when the user determines that the linearity distortion is generated among the screen distortions of the image displayed on the imager, the linearity adjustment is performed through a menu function for adjusting the linearity adjustment pattern among the menu functions of the imager. Display the pattern in OSD form, and use the keypad of the remote control 200 to vertically press, for example, numeric keys and volume up / down (vertical line or horizontal line) or channel up / down key (horizontal line or vertical line). Allows you to adjust the spacing of lines or horizontal lines. The memory unit 150 stores the newly adjusted vertical and horizontal line values through the storage function after the adjustment, and the signal processor 120 performs image processing according to the newly adjusted vertical and horizontal line values.

9 is a flowchart illustrating a linearity correction method of an imaging apparatus according to the present invention.

In the linearity correction method of the imaging apparatus according to the present invention, after the user selects a menu function through the remote controller 200, selects a 'linearity adjustment' item in the menu function (S100).

When the user selects the linearity adjustment item in the menu function, the controller 170 displays the linearity adjustment pattern of the adjustment pattern memory unit 122 on the display unit 140 through the signal processor 120 and the OSD processor 160 ( S110).

Next, select a corresponding line by inputting a numeric key on the keypad of the remote controller, and move the corresponding line of the vertical or horizontal line to be adjusted in a desired direction through an adjustment key (volume or channel) (S120). At this time, the number key selects the number of one line among the vertical (first direction) and horizontal (second direction) lines, and the movement of the line in the vertical direction or the horizontal direction according to the volume or channel key selection. To be At this time, for example, the volume key may guide the movement in the vertical direction and the channel key in the horizontal direction in the form of OSD.

Accordingly, linearity in the first direction is adjusted (S130). Wherein the horizontal or vertical line is to be moved in the unit set by the field experience or experiment (for example, mm unit or one scan line unit).

Next, it is determined whether the linearity adjustment in the first direction is completed (the completion key (OK key) from the user) (S140).

If adjustment of the determination result (S140) is completed, the linearity in the second direction is adjusted (S150).

Next, it is determined whether the linearity adjustment in the second direction is completed (S160).

As a result of determination (S160), when the adjustment is completed, the adjusted vertical and horizontal lines are stored in the memory unit 150 (S170).

Subsequently, the image signal input later is displayed by adjusting the vertical and horizontal intervals of the image using the newly adjusted linearity pattern (S180).

In the image device and the linearity distortion correction method according to the present invention, when the user is dissatisfied with the linearity adjustment state while the adjustment is completed during the production of the image device, or abnormality in the linearity due to various causes (long time use, impact, etc.) during use In this case, since the user can directly correct the linearity distortion without any particular difficulty, there is an effect that the user's satisfaction with the linearity distortion can be improved.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (7)

A tuner unit for tuning the broadcast channel selected by the user; A signal processor which performs decoding and scaling on the broadcast signal tuned by the tuner, and stores a linearity adjustment pattern for adjusting linearity distortion of an image; A deflection controller configured to perform R, G, and B horizontal and vertical deflection of the image signal processed by the signal processor; A display unit configured to display the deflection-controlled R, G, and B images; And, The horizontal and vertical line spacing values are memorized for adjusting linearity in the signal processor, and the vertical and horizontal line spacing values are provided to the signal processor, and the vertical and horizontal lines are displayed through the display unit. And a control unit for transmitting a control command to the signal processing unit. The method of claim 1, The signal processing unit, A signal processing controller which decodes the broadcast signal transmitted from the tuner unit and scales the video signal through a temporary memory unit so that the image signal can be displayed at a resolution set by the display unit; An adjustment pattern memory unit for storing a linearity adjustment pattern displayed on the display unit in an on-screen display form and adjustable by a user; A temporary memory unit for temporarily storing an image signal transmitted from the tuner unit and performing image scaling; And a digital / analog converter for digitally / analog converting and outputting a video signal subjected to scaling in the temporary memory unit. The method of claim 1, The linearity adjustment pattern may include a plurality of vertical and horizontal lines formed in a cross hatch on the display unit, and an identifier is assigned to each of the plurality of vertical and horizontal lines. The method of claim 1, The imaging apparatus further comprises a memory for separately storing the interval values of the vertical and horizontal lines of the screen adjusted in the production line or the vertical and horizontal lines newly adjusted by the control command. The method of claim 1, And a control command transmitted by the controller to the signal processor is input through a keypad of a remote controller for remotely controlling the video device. Selecting a menu function through a remote controller and then selecting a linearity adjustment item from the menu function to display a plurality of vertical and horizontal lines in a cross hatch form on a display unit of a video device; Selecting vertical or horizontal lines to be adjusted through a keypad of the remote controller and adjusting the linearity in the vertical or horizontal direction by moving the corresponding lines in a desired direction; And, And when the linearity adjustment is completed, storing the vertical and horizontal line intervals, and adjusting and displaying the newly adjusted vertical and horizontal intervals when decoding and scaling the input image signal. To correct linearity distortion. The method of claim 6, Adjusting the linearity, Selecting the vertical or horizontal lines through the numeric keys of the remote controller and moving the selected lines in a desired direction by using one or more of the volume and channel adjustment keys of the remote controller. Calibration method.

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