KR20050056395A - Apparatus and method for the alignment of the convergence of projection television by using photo sensor - Google Patents

Abstract

The present invention relates to an apparatus and a method for adjusting convergence in a projection television, and in the case of a projection television, even if the convergence is adjusted and shipped at the product production stage, the convergence can be set according to the location and direction of the installation of the geomagnetic field. When the convergence is adjusted at the user's stage of use, the convergence adjustment pattern is generated in the overscan area outside the display area so that the TV can be viewed even when the convergence adjustment is performed. Providing an apparatus and method for storing convergence correction amount data calculated from signals detected from an optical sensor, and then performing convergence adjustment using the stored correction amount if necessary, thereby avoiding television viewing at the time of convergence adjustment. Remove that the appearance that the convergence adjustment to be output to the display area of the screen, and provides a convergence adjustment apparatus and method using an optical sensor of the projection television which improves the continuity of the viewer.

Description

APPARATUS AND METHOD FOR THE ALIGNMENT OF THE CONVERGENCE OF PROJECTION TELEVISION BY USING PHOTO SENSOR}

The present invention relates to an apparatus and a method for adjusting convergence in a projection television, and in the case of a projection television, even if the convergence is adjusted and shipped at the product production stage, the location and direction of the television are installed due to the influence of a geomagnetic field. In order to improve the phenomenon of convergence, the convergence adjustment is performed at the user's stage of use, so that the convergence adjustment that is unnecessary for the television viewing is prevented from being output to the display area of the screen so that the television can be viewed even when the convergence adjustment is performed. Provided is an apparatus and method for adjusting convergence using an optical sensor having improved continuity.

Unlike conventional direct view televisions, projection televisions have three separate CRT structures: red (R), green (G), and blue (B). ), Convergence control is required to bring the blue (B) beam into focus. Although the convergence adjustment is perfectly made in the production of the projection television, it is practically impossible to realize the same convergence adjustment state as that of the factory shipment due to the change in the amount of current in the convergence yoke due to the influence of the geomagnetic field of the installation site.

When a screen shift occurs or the red (R), green (G), and blue (B) beams deviate from each other, color distortion occurs, resulting in deterioration of image quality and deterioration of peripheral focus. It is necessary to adjust the convergence to focus the beam at the correct position on the screen by ensuring that the red (R), green (G), and blue (B) beams do not deviate from each other. These convergence adjustments include adjustment of static convergence, which adjusts the concentration near the center of the screen, and dynamic convergence, which adjusts the concentration on the outside of the screen. Although it is primarily carried out by the producer before the television is shipped out, as described above, the projection television is susceptible to changes in the direction of the geomagnetic field relative to its installation direction, so it is easy to cause distortions in which the convergence is distorted, thus the user's use stage. There is a need for an apparatus or method for adjusting the convergence relative to the change of the geomagnetic field direction according to the installation direction by a user's operation or automatically.

Looking at the prior art provided for the convergence adjustment in such a use state, the convergence correction amount according to the installation direction of the television is stored in advance in the memory in the set, and the user manually selects from the stored convergence correction amount while viewing the screen or the optical sensor (for example, And a convergence correction amount automatically selected by the photodiode). As a more specific method, when adjusting the convergence (static convergence) of the center of the screen, a green (G) cross pattern 2 is output toward the center of the screen 1 in the state of dedicated convergence adjustment screen as shown in FIG. 1A. And manually calculate the separation distance from the preset central position or automatically by an optical sensor (not shown) installed at a position corresponding to the center of the screen, and then select the amount of convergence correction based on this. The same process is repeated for R) and blue (B) so that the red (R), green (G), and blue (B) beams are concentrated at one point in the center of the screen to achieve color matching. In addition, when adjusting the convergence (dynamic convergence) of the outer edge of the screen, the square pattern 3 is output toward the outer edge of the screen 1 in the convergence adjustment-only screen state as shown in FIG. 1B to calculate and adjust the convergence correction amount. The red (R), green (G), and blue (B) beams are concentrated at one point to achieve color matching in the periphery of the screen.

However, in the convergence adjustment device and the adjustment method according to the related art, not only the manual adjustment that requires the user to perform the adjustment while watching the convergence adjustment screen directly, but also the automatic adjustment using the optical sensor, Since the dedicated screen is output to the display area of the screen, viewing of the television screen becomes impossible, and there is a problem that the continuity of viewing of a television program or the like must be abandoned.

The present invention, in order to solve the above problems of the prior art, in the adjustment of the convergence of the projection television, not only automates the adjusting device and the adjusting method using the optical sensor, but also overscans the optical sensor outside the display area of the screen. Place it in the (Overscan) area and generate an adjustment pattern only in the overscan area to calculate the amount of convergence correction independent of watching television in the display area, and then temporarily store the result and then save the result without interrupting the continuity of watching the television program. It is intended to provide an apparatus and a method for executing convergence adjustment by reflecting this.

According to an aspect of the present invention, there is provided a convergence adjustment apparatus using an optical sensor of a projection television, comprising: an optical sensor disposed in an overscan area of a screen while corresponding to a predetermined specific position on a screen; A pattern generator for generating a pattern for finding a specific position on a screen and outputting the pattern to an overscan area around the optical sensor; An arithmetic unit configured to calculate a convergence correction amount from a convergence value when the pattern is detected by the optical sensor while changing a convergence value and moving a position of the pattern output on the overscan area on the screen; A storage unit for storing the convergence correction amount calculated from the calculation unit; Provided is a convergence adjusting device using an optical sensor of a projection television, characterized in that it comprises a convergence adjusting unit for extracting the convergence correction amount from the storage unit and performing convergence adjustment when changing the screen size or changing the channel.

In addition, the present invention provides a method of adjusting convergence using an optical sensor of a projection television in which an optical sensor disposed in an overscan area of a screen while corresponding to a predetermined position on a screen is present, wherein there is a key input for convergence adjustment. A start step of starting the progress of the adjustment step; Generating a pattern for finding a specific position on a screen and outputting the pattern to an overscan area around the optical sensor; A pattern detecting step of detecting a pattern by an optical sensor while changing a convergence value and moving a position of a pattern output to an overscan area on the screen; A convergence correction amount calculation step of calculating a convergence correction amount from the convergence value when the pattern is detected; A convergence correction amount storage step of storing the convergence correction amount calculated from the calculation step; And a convergence adjustment step of performing a convergence adjustment by extracting the convergence correction amount stored in the storing step when the screen size is changed or the channel is switched. .

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

As shown in Figs. 2 and 4, a preferred embodiment of the apparatus according to the present invention comprises: optical sensors 20a, 20b, 20c disposed in the overscan area 12 of the screen 1; A pattern generator 30 for outputting the pattern 21 to the overscan area 12 around the optical sensors 20a, 20b, and 20c; A calculation unit 40 for calculating a convergence correction amount when a pattern is detected by the optical sensors 20a, 20b, and 20c; A storage unit 50 for storing the calculated convergence correction amount; And a convergence adjusting unit 60 which extracts a convergence correction amount from the storage unit 50 and performs convergence adjustment.

More specifically, the optical sensors 20a, 20b, and 20c disposed in the overscan area 12 of the screen 1 while corresponding to a predetermined specific position on the screen 1 are provided. It is preferable to the overscan area 12, which is an area outside the display area 11 utilized for television viewing, in which the beams of green (G), red (R), and blue (B) can be projected. At least four optical sensors 20a or more, for example eight optical sensors 20a, 20b to twelve optical sensors 20a, 20b, 20c are arranged. The pattern generator 30 generating a pattern for finding a specific position on the screen 11 may include a pattern 21, for example, in the overscan area 12 around the optical sensor 20a, 20b, or 20c. Will output a line-pattern. The calculation unit 40 that calculates the convergence correction amount may detect the pattern output by moving the position in the overscan area 12 on the screen 1 according to the change of the convergence value by the optical sensors 20a, 20b, or 20c. The convergence correction amount is calculated from the convergence value at the time. Meanwhile, the convergence correction amount calculated as described above is stored in the storage unit 50, and when the user later changes the screen size or switches the channel, the convergence correction amount stored in the storage unit 50 is extracted and the convergence adjustment unit ( 60) convergence adjustment is performed.

If the above-described process of implementing the present invention by the apparatus according to the present invention will be described in detail with reference to FIG. And a pattern output step of generating a pattern for finding a specific position on the screen 1 and outputting the pattern 21, for example, a line-pattern, to the overscan area 12 around the optical sensors 20a, 20b, and 20c. 110 is performed, and pattern detection for detecting the pattern by the optical sensors 20a, 20b, and 20c while changing the convergence value and shifting the position of the pattern output to the overscan area 12 on the screen 1. Step 120 is performed, and a convergence correction amount calculation step 130 for calculating a convergence correction amount from the convergence value when the pattern is detected is performed; A convergence correction amount storing step 140 of storing the convergence correction amount calculated from the calculation step 130 is performed; Furthermore, when the screen size is changed or the channel is switched, the convergence adjustment execution step 150 for carrying out the convergence adjustment by extracting the stored convergence correction amount in the storage step 140 is performed, whereby the convergence adjustment process without interruption of viewing of the television screen is performed. This ends (200).

The above is merely illustrative of the preferred embodiments of the present invention, and those skilled in the art should recognize that modifications or variations can be made to the present invention without changing the technical spirit and gist of the present invention. will be.

According to the present invention, the convergence adjusting device and the adjusting method of the projection television are not only automated using the optical sensor, but also the optical sensor is placed in the overscan area and the adjustment pattern is generated only in the overscan area so that the television in the display area can be generated. When the convergence correction amount is calculated independently of the viewing, the result is temporarily stored, and when the continuity of viewing of the television program is not impaired, the result of the convergence adjustment can be performed by reflecting the result.

1A is a diagram illustrating a cross pattern output on a screen at the time of static convergence adjustment according to the prior art;

1B is a diagram illustrating a square pattern output on a screen at the time of dynamic convergence adjustment according to the prior art.

2 is a view showing a state in which an optical sensor is disposed in an overscan area and a state in which a convergence adjustment pattern is output according to the present invention;

3 is a flowchart illustrating steps in which a method for automatically adjusting convergence according to the present invention is performed.

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

1: Screen 2: Cross Pattern

3: square pattern 11: display area

12: overscan area 20a, 20b, 20c: optical sensor (photodiode)

21: pattern 30: pattern generator

40: calculator 50: storage

60: convergence control unit 100: start step

110: pattern output step 120: pattern detection step

130: convergence correction amount calculation step

140: convergence correction amount storage step

150: Execution of convergence adjustment

Claims (2)

In the convergence adjustment device using the optical sensor of the projection television, An optical sensor 20a, 20b, or 20c disposed in the overscan area 12 of the screen 1 while corresponding to a preset specific position on the screen 1; A pattern generator 30 generating a pattern for finding a specific position on the screen 1 and outputting the pattern 21 to the overscan area 12 around the optical sensor 20a, 20b, or 20c; The convergence correction amount is changed from the convergence value when the pattern is detected by the optical sensor 20a, 20b, or 20c while changing the convergence value to move the position of the pattern output to the overscan area 12 on the screen 1. A calculation unit 40 for calculating; A storage unit 50 for storing the convergence correction amount calculated from the calculation unit 40; And a convergence adjustment unit (60) for performing convergence adjustment by extracting a convergence correction amount from the storage unit (50) when changing the screen size or changing the channel. In the convergence adjustment method of the projection television which arrange | positioned the optical sensor 20a, 20b, or 20c arrange | positioned at the overscan area 12 of the screen 1, corresponding to the preset specific position on the screen 1, A start step 100 for starting the progress of the adjustment step when there is a key input for the convergence adjustment; A pattern output step (110) of generating a pattern for finding a specific position on the screen (1) and outputting the pattern (21) to the overscan area (12) around the optical sensor (20a, 20b, or 20c); A pattern detection step 120 of detecting the pattern by the optical sensors 20a, 20b, or 20c while changing the convergence value and moving the position of the pattern output to the overscan area 12 on the screen 1; A convergence correction amount calculation step 130 of calculating a convergence correction amount from the convergence value when the pattern is detected; A convergence correction amount storing step 140 for storing the convergence correction amount calculated from the calculation step 130; And Convergence using an optical sensor of a projection television, comprising: a convergence adjustment execution step 150 for extracting the convergence correction amount stored in the storing step 140 and performing convergence adjustment when changing the screen size or changing the channel. Adjustment method.