JP2006041979A - Television receiver - Google Patents

Abstract

Television receivers using various display devices have been developed and are commercially available, but the housing is becoming larger and the video display is always displayed in an upright state. In some cases, such as a patient who cannot be viewed in a normal posture, such as tilting the housing cannot be taken, and there is a problem that causes stress on the viewer. Another problem is that an image that is difficult to recognize is displayed as it is in the case of color blindness.
In a stage before displaying video on a television, when the geometry engine is used and the image is deformed and displayed in an arbitrary direction, size and angle, the television can be viewed only beside it. The image is rotated 90 degrees and displayed so that the patient can view it with the screen upright. In addition, the function of the geometry engine provides an easy-to-view video by converting color areas that cannot be recognized due to color blindness to other colors.
[Selection] Figure 1

Description

  The present invention relates to a television receiver, and more particularly to a television receiver capable of deforming and displaying an image in an arbitrary area on a screen.

  At present, there are a large number of television receivers using liquid crystal, plasma, cathode ray tubes, etc. as display devices. Among them, liquid crystal panels have a remarkable increase in viewing angle and image quality. In addition, the screen is becoming larger.

  As a display device of a television receiver, devices shown in Patent Literature 1, Patent Literature 2, and Patent Literature 3 are known. Many others are known, including:

Moreover, although not a television receiver, recent personal computers are equipped with graphic accelerators, and some of them have a function of displaying a moving image at an arbitrary position as an overlap window. The display mechanism itself is the same as the existing technology described above.
JP-A-61-180293 Japanese Laid-Open Patent Publication No. 02-211784 Japanese Patent Laid-Open No. 03-094589

  The television receiver has a wide variety of products in terms of size and display image quality due to various display devices. However, the display form is emitted from a cathode ray tube (CRT), that is, an electron gun. Inheriting a raster scan type display in which the received signal is scanned in the horizontal direction or a display method corresponding to the matrix-like display elements found in Patent Document 1, Patent Document 2, and Patent Document 3 Therefore, the screen is always displayed in an upright state.

  However, when an actual viewer views the screen, the viewer does not always view the screen in a state of facing the screen. For example, a viewer who watches a television set on his / her side while lying in a hospital bed views the video at a 90 ° offset from that of normal viewing. In addition, a viewer who views a television reflected in a mirror in a barber will view an image that is reversed from the normal viewing. Or, in the case of a viewer who has an impairment in the ability to recognize a specific color pattern, such as a color blindness, certain information is missing and recognized.

  If this is just a background or video of a person, there will be no problem, but if text information is superimposed and displayed here, the viewer will be required to work very hard to obtain that information. . Although the above example is extreme, the current television receiver lacks a function for viewing arbitrary image information in a posture desired by each person.

  Also, even when displaying moving images with overlapping windows using high-performance graphic accelerators that can be seen on recent personal computers, the image size is variable, but the images are always upright. There is no example of controlling the display direction and shape.

  In general, a method that can be considered to solve the above problems is to install the receiver by tilting it at an angle suitable for the viewer, but there is a limit to this. Recently, there is a television receiver with a tilt, and the screen can be tilted with a considerable degree of freedom. However, there are cases where the size of the main body is enormous and this is not possible due to restrictions on installation space.

  In the present invention, once received video is subjected to processing such as enlargement / reduction / rotation / deformation / inversion / color conversion, and then displayed on the screen. Thereby, the video upright with respect to an arbitrary direction is displayed by tilting the displayed video instead of the receiver main body. In addition, a reversal process is also performed so that a normal image can be obtained even in a mirrored state.

  According to the present invention, it is possible to provide an image that directly faces the viewer according to the posture of the viewer without having to handle the television receiver main body having a weight or a certain size, thereby reducing the burden on viewing. it can. In addition, by performing color conversion, it is possible to view a video without any burden even in the case of a viewer who has a rejection reaction to a specific light stimulus or has a color blindness.

  In the best mode for carrying out the present invention, information displayed as an image and text information of a superimposed menu are less deteriorated through processing such as enlargement / reduction / rotation / deformation / inversion / color conversion. desired. For this reason, video information acquired from broadcast radio waves is not enlarged / reduced / rotated / transformed / inverted / color converted and output to the screen, but the image once expanded in the frame buffer is enlarged / reduced / rotated / transformed. It is assumed that the output is performed on the screen while suppressing deterioration as much as possible through a rendering engine having a function for / inversion / color conversion, that is, a function for complementing information lost by image processing.

(Embodiment 1)
In the first embodiment, the received image is treated as a texture once mapped to the surface of the polygon, and this is displayed on the actual screen through the rendering engine. In this process, by applying processing such as enlargement / reduction / rotation / deformation / reversal / color conversion to this polygon, a normal image can be displayed when tilted at an arbitrary angle or displayed in a mirror when displayed on the actual screen. By performing reverse display such as the above, or by performing color conversion, it is possible to provide information by converting the video into a color map that can be easily identified by a color blind person.

  An example of Embodiment 1 of the present invention is shown in FIG. The video and audio signals transmitted by being superimposed on the broadcast radio wave 101 are decoded by the decoder unit 102, and the audio 103 is output from the speaker 109. The video 104 is first drawn on a polygon on the frame buffer 105 and treated as a texture pasted on the polygon. Furthermore, after being combined with the menu item 106 displayed on the OSD (on-screen display) and finally subjected to arbitrary calculation (enlargement / reduction / rotation / deformation / inversion / color conversion) by the rendering engine 107, The actual screen 108 is output.

  In the implementation example, a rendering engine that can handle texture map polygons is used. However, since such a high-performance rendering engine is still expensive, the image is developed in the frame buffer and used as an existing image. You may mount so that arbitrary deformation | transformation may be performed using a correction | amendment function and it may display on a screen directly.

  An example of the enlargement / reduction function is shown in FIG. If the enlargement 203 is selected from the menu 202 displayed on the screen 201, the enlarged screen 204 is displayed, and if the reduction 205 is selected, the reduced screen 206 is displayed. The enlargement ratio and reduction ratio may be fixed or arbitrary width, but may be used appropriately. In the embodiment, it is changed with a fixed width.

  An example of the image rotation function is shown in FIG. If rotation 303 is selected from the menu 302 on the screen 301, the rotated image 304 is displayed at an arbitrary angle. At this time, if a region that protrudes due to rotation occurs, enlargement or reduction may be automatically performed so that the region fits in the screen range as appropriate. The rotation angle may be fixed or arbitrary, but may be properly used. In the embodiment, it is changed at a fixed angle.

  Further, as an image inversion example, as shown in FIG. 4, the top, bottom, left, and right of the image can be switched from a menu 401. In this figure, the display contents of the menu 401 are always upright, but in this embodiment, the menu is also enlarged / reduced / rotated / transformed / inverted / color converted by the rendering engine in the same manner as the background image. The character state also changes. This makes it possible to use, for example, an EPG (electronic program guide: displaying a program guide on a screen like a television column of a newspaper) in a lying state.

  An example of controlling the depth of the image is shown in FIG. By designating the direction in which the screen is to be tilted, an image transformed with respect to the actual screen is displayed. This can be realized by performing arithmetic processing for inclining the polygon with respect to the display surface. In the example of FIG. 5, only an example in which the image is tilted in a single direction, up, down, left, and right, is illustrated. However, since the video is mapped to polygons, a plurality of tilts can be specified at the same time. The inclination may be a fixed angle or an arbitrary angle. However, since the position of the viewer is considered to be wide, it is preferable that the inclination is changed at an arbitrary angle.

  The processing such as enlargement / reduction / rotation / deformation / inversion / color conversion is performed only for a single image in the implementation example, but this is expanded and referred to as a main screen and a sub screen, or a right screen and a left screen. Thus, there can be considered an application example in which different images are displayed at the same time and are displayed in different directions.

  Although not implemented in the first embodiment, a sound field control DSP (digital signal processor) is implemented in the previous stage of audio output, and even at a position not facing the screen as shown in FIG. You may apply correction | amendment so that an audio | voice can be heard normally. In this correction, the normal vector of the polygon when displayed on the screen is calculated, and the sound field is calculated with the direction virtually corresponding to the directly facing position of the screen. As a result, it is possible to provide a sound closer to the actual reproduction state to a viewer who is at a position deviating from the directly facing position with respect to the actual screen. At this time, it may be considered as an application that the speaker is actually tilted in the direction by a driving device such as a servo motor to generate a sound.

  In the future, this can be applied to recognize the viewer's position with a sensor, automatically set the direction and sound field of the video, and always provide a video that faces the viewer. As an application, it may be possible to provide an image having a size corresponding to the distance of the viewer. In this case, if it is mounted so that it can be viewed in a larger size as it is farther away, it can be applied to a large projector etc. Also, if it is mounted so that the image enlarges as it gets closer, the visual acuity will be reduced It can be applied to help elderly people with low vision and viewers with low vision to see detailed parts of the video. Regarding color conversion, several patterns of preset values based on color engineering are prepared, and a color-converted video is displayed by selecting from these patterns.

  The display device according to the present invention can display a television image by arbitrarily enlarging / reducing / rotating / deforming / inverting / color-converting and displaying not only a normal viewing mode of the television image but also a change in color tone. It can also be applied to advertising media using visual effects such as illumination effects, rotation, enlargement / reduction, and reversal.

The figure which shows the mounting state in this Embodiment 1. Diagram showing an implementation example of the enlargement / reduction function Diagram showing an implementation example of the image rotation function The figure which shows the Example of image inversion The figure which shows the explanation of depth control of the screen The figure which shows the example of sound field control

Explanation of symbols

101 Broadcast Radio 102 Decoder 103 Audio 104 Video 105 Frame Buffer 106 Menu Item 107 Rendering Engine 108 Actual Screen 109 Speaker

Claims (2)

Among television receivers, a television receiver having a function of tilting or deforming an image without tilting the receiver body. The television receiver according to claim 1, further comprising a rendering engine for enlarging / reducing / rotating / deforming / inverting / color-converting received video.

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