This application claims the benefit of Korean Application No. 10-2005-0011342, filed on Feb. 7, 2005, which is hereby incorporated by reference.
1. Field of the Invention
The present invention relates to a method of displaying vidoe, and more particularly, to a method of displaying video during auto-convergence.
2. Discussion of the Related Art
Generally, a projection television (TV) comprises a cathode ray tube (CRT) having three colors, namely, red, green, and blue (RGB). In operation, the CRT shoots a beam of lights through an optical unit comprised of a plurality of reflecting mirrors and lenses. The beam of lights is then magnified and projected on a large screen of the projection TV.
The quality of sensitivity of the projection TV is comprised of various categories such as white uniformity (W/U), bright uniformity (B/U), convergence, focus, distortion. The description of the convergence is as follows. The convergence refers to converging of the RGB lights shot from an electron gun to a point on a screen as a result of a magnetic field of the deflecting yolk. On the contrary, if there is a defect to the deflecting yolk or the lights are deflected improperly, misconvergence occurs resulting in a color bias on the screen.
That is, the RGB lights have to accurately focus at a point on a screen in order for a white light to be visible. However, with misconvergence, lines represented by colors other than the RGB colors are displayed, negatively affecting the quality of the visual screen. In other words, it is important to focus the RGB lights shot from the CRT to a single point.
Here, focusing of the RGB lights to a single point is called auto convergence. With the advent of digital broadcasting, projection TVs are receiving the spotlight as the display to satisfy the demands for large screen televisions. However, the projection TVs are not without flaws. As a disadvantage of the projection TV, a user has to execute convergence of the RGB lights because the projection TV comprises CRTs corresponding to each RGB color. The reason for this is that with the increasing number of viewing hours, the converged RGB lights can loose the convergence. Without executing convergence, the clarity or distinction of colors on the screen displaying a video can be inaccurate.
To fix such problems of misconvergence, the projection TV includes a convergence correction unit for controlling lights so that the video outputted from each light transmitter is accurately displayed on the screen. Generally, projection TVs packaged for sale have gone through extensive testing, including convergence; however, once the TVs having corrected convergence are viewed at home by users, factors such as change in environment or magnetic fields from other electronic devices cause errors to convergence in TVs. Therefore, the convergence correcting device can be used in homes to corrected errors to convergence.
The following figures are used to explain auto convergence of projection TVs in detail.
In operation, the projector 10 emits the video to the screen 80 after the video is deflected off the mirror 60. The auto convergence unit 20, according to the control signals, generates RGB signal patterns for executing auto convergence, and thereafter executes auto convergence after the RGB signal patterns are detected by the light sensor 30.
The light sensor 30 (30a-30h) are placed behind the screen 80, which hidden from the exposed view of the consumer, to detect the pattern signals of the RGB signals. In addition, the connector 40 (40a-40h) are signal lines to transmit signals detected from the light sensor 30 to the auto convergence unit 20. Moreover, the cabinet 50 operatively connects the light sensor 30 and the connector 40. The mirror 60 reflects the video outputted from the projector 10 to the screen 80. Here, the screen 80 display the video which has been reflected by the mirror 60 on the screen 80.
After determining that the command signal for auto convergence has been properly entered, the video currently viewed is blocked from being displayed or the screen is turned off in order to execute auto convergence (S30). Next, the projection TV determines whether the brightness of the outside or ambient light is appropriate to execute auto convergence (S40). This step is necessary to prevent error while executing auto convergence.
After determining that the outside light is too bright for auto convergence, the projection TV provides a instruction message on the display area requesting the user to lower or dim the lighting and re-enter the auto convergence command signal (S50). However, if the light sensor determines that the brightness of the outside light is appropriate for executing auto convergence, a color correction with respect to each of the RGB colors is executed (S60). Thereafter, the factory set RGB color levels are used as reference to executing auto convergence (S70).
As explained above with respect to conventional projection TVs, executing auto convergence involves emitting only the signal light (signal pattern), and not the video, to prevent errors by the light sensor. To accomplish this, the video that was being displayed on the display area is turned off (or muted). Consequently, a view cannot view the video or the current programming during auto convergence execution.
Accordingly, the present invention is directed to a [title] that substantially obviates one or more problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a method/device—
Another object of the present invention is to provide a
A further object of the present invention is to provide a
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, [a method ———includes - - - ].
In another aspect of the present invention, a [- - - includes - - - ].
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings;
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
In the present invention, when executing auto convergence, the video currently viewing viewed can be displayed in a display window 130 of the display area 120 in a form of picture-in-picture (PIP) or picture-on-picture (POP), for example. Here, the size of the display window 130 is smaller than the size of the display area 120. Furthermore, the size and location of the specified area 130 can be controlled. More specifically, the size of the display window 130 (e.g., PIP or POP) can be up to approximately ¾ the size of the display area 130. At the same time, the location of the display window 130 (e.g., PIP or POP) should be located on the display area 120 so as to not affect the output measurement voltage from the specified pattern area of the signal pattern when auto convergence is being executed.
Alternatively, if the command signal for executing auto convergence was recognized by the projection TV, the picture or video currently being viewed on the display area is turned off or not displayed (S120). Thereafter, the outside or ambient light surrounding the projection TV is measured to determine whether the brightness is appropriate for executing auto convergence (S130). The reason for determining the ambient light brightness is to accurately measure and prevent errors in executing auto convergence.
After measuring the outside light, if it is determined that the outside light exceeds the permitted brightness level or a reference brightness set by the manufacturer, an instruction message is displayed on the display area of the projection TV requesting the user or viewer to dim or lower the ambient brightness and re-enter the command signal for executing auto convergence (S1140).
However, if the outside light is determined appropriate for executing auto convergence, the picture or video currently being viewed is displayed on the display window (e.g., PIP) on display area 120 of the projection TV (S150). Next, auto convergence, which includes color correction of RGB colors, is performed (S160). Thereafter, the RGB colors set by the manufacturer is compared to the current current RGB colors (S170). Lastly, after completion of auto convergence, the display on the display window (e.g., PIP) is displayed on the full screen (S180).
Alternatively, if the command signal for executing auto convergence was recognized by the projection TV, the picture or video currently being viewed on the display area is turned off or not displayed (S120). Thereafter, the outside or ambient light surrounding the projection TV is measured to determine whether the brightness is appropriate for executing auto convergence (S130). The reason for determining the ambient light brightness is to accurately measure and prevent errors in executing auto convergence.
After measuring the outside light, if it is determined that the outside light exceeds the permitted brightness level or a reference brightness set by the manufacturer, an instruction message is displayed on the display area of the projection TV requesting the user or viewer to dim or lower the ambient brightness and re-enter the command signal for executing auto convergence (S140). As mentioned above, the instruction message can be an audio instruction delivered via a speaker.
However, if the outside light is determined appropriate for executing auto convergence, the picture or video currently being viewed is displayed on the display window (e.g., PIP) on display area 120 of the projection TV (S150). Before executing auto convergence, a determination is made as to whether the display on the display window 130 (e.g., PIP) affects the signal pattern in executing auto convergence (S160). Here, if it is determined that the display affects the signal pattern area 110 for executing auto convergence, the size and/or the location of the display window 130 is resized and/or relocated so as not to affect execution of auto convergence (S170). However, if it determined that the display on the display window 130 does not affect the signal pattern area 110, auto convergence is executed (S180).
Thereafter, the RGB colors at the time of auto convergence are compared to the RGB colors preset by the manufacturer (S190). Lastly, after completion of auto convergence, the display on the display window (e.g., PIP) is displayed on the full screen (S200).
As discussed above, the size of the display window 130 can be adjusted or resized. By default, the size of the display window can be ½ or ⅔ size of the display area 120. However, the size does not have to be restricted. The size of the display window 130 can be expanded to a size that does not affect the signal pattern area 110 in executing auto convergence. In other words, if the display window is displaying a picture or video, the signal indirectly emitted from the specific display area 130 should not be too close so as to affect the pattern area 110 in executing auto convergence.
In addition, a maximum size or boundary of the display window 130 can be set by the manufacturer of the projection TV. It is likely that the manufacturer has undergone series of field testing to determine the appropriate or acceptable maximum size or boundary from which the specific display area size can be adjusted without affecting the signal pattern 110. Therefore, the size of the display window 130 can be adjusted within the boundary established by manufacturer.
Furthermore, the size of the specific display area 130 can be adjusted automatically. More specifically, the size can be automatically downward adjusted. That is, if the size of the specific display area 130 is determined to affect (or too close to) the signal pattern area 110 during execution of auto convergence, the size of the specific display area 130 would be automatically reduced to a size that does not affect the signal pattern area 110. Again, the reduction or the downward adjustment would be preset in the projection TV by the manufacturer using a certain algorithm.
In addition to adjusting the size of the specific display area 130, relocating the display window 130 within the display area 120 is also possible. Similar to the discussion of above with respect to the size adjustment, a boundary can be set within which the display window 130 can be located. Again, it is likely that the manufacturer has undergone series of field testing to determine the appropriate or acceptable maximum size or boundary from which the display window size can be relocated without affecting the signal pattern area 110. As such, the display window 130 can be positioned anywhere within the boundary established by manufacturer.
Another example of relocating the display window 130 relates to relocating the display window 130 anywhere in the display area 120. To accomplish this, the display window 130 has to be safely distanced from the signal pattern area 110 so as not to affect execution of auto convergence. For example, if auto convergence is being performed in the signal pattern area on top of the display area, the display window 130 can be relocated to slightly below the signal pattern area 110 without affecting the signal pattern or to the bottom of the display area 120 to be safe. Here, the minimum safe distance can be preset or predetermined by the manufacturer.
Additionally, if it is determined that the display window 130 does affect the signal pattern area 110, the display window 130 can be relocated to the opposite side or opposing end of the signal pattern area executing auto convergence. For example, if the signal pattern area 110 on top of display area is executing auto convergence, the display window can be relocated to the bottom of the screen, safely away from the signal pattern area executing auto convergence.
The discussion above regarding size adjustment and relocation of display window is not limited to the discussion of above. Adjusting and relocating of display window size can take place according to any combination of the discussion above. For example, the display window 130 can be relocated and size adjusted at the same time.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Number | Date | Country | Kind |
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10-2005-0011342 | Feb 2005 | KR | national |