JP2006201425A - Video display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display apparatus in which non-video section can be made conspicuous naturally from a frame without needing a mask by a mechanical mechanism or a dimming glass. <P>SOLUTION: A rear projection apparatus 10 not only prevents non-video regions TQ and BQ from being conspicuous from an outer frame 41, but four outer edges of a limited display area LA is emphasized by a line shape frame area FL and the outer frame 41 and the non-video regions TQ and BQ are seen more integrally. Thereby, a video of a different aspect ratio from a normal ratio, which is formed in the limited display area LA, can be, is observed without sense of incongruity. Moreover, despite a plurality of outer frames 41 and 141 being exchangeable, the outer frames 41 and 141 and the non-video regions TQ and BQ are seen integrally before and after the exchanging, and the video formed in the limited display area LA is observed without sense of incongruity. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rear projection device, a liquid crystal display, a CRT, and other video display devices.

  In a conventional video display device, an aspect ratio of 16: 9 is displayed on a screen with an aspect ratio of 4: 3 in a letterbox format with the top and bottom black, or conversely, an aspect ratio is displayed on a screen with an aspect ratio of 16: 9. An image with a ratio of 4: 3 may be displayed in a side black format with black on the left and right. In such a case, the presence of the upper and lower and left and right no-video parts tends to be noticeable, which tends to hinder video viewing.

  As described above, when the aspect ratio of the display screen and the aspect ratio of the display image are different, work such as zooming and panorama display has been performed to reduce the non-image area appearing on the display screen as much as possible ( For example, refer to Patent Document 1), such video processing cannot avoid missing or distorted video.

  On the other hand, as a technique for making an image-free portion inconspicuous when an image is displayed without omission or distortion, there is one that provides a mechanical mechanism such as an adjustable cover, movable escutcheon, or movable frame in the vicinity of the screen (Patent Document 2). , 3 and 4).

  Further, as another technique for making the non-image portion inconspicuous when an image is displayed without omission or distortion, a dimming glass is arranged on the front surface of a CRT panel glass having an aspect ratio of 16: 9, and 4 at the center of the dimming glass is provided. : There exist some which form a transmission part in the part of 3 (refer patent document 5).

  In addition, there is an aspect ratio conversion device that displays an arbitrary color on the side panel portion (that is, the non-video portion) of the wide display as another technique for making the non-video portion inconspicuous when the video is displayed without omission or distortion. (See Patent Document 6). In this aspect ratio conversion apparatus, the color displayed on the side panel portion can be set according to the color of the frame portion of the display.

In addition, there is one that displays a single color on the side panel of a wide display (see Patent Document 7).
JP 2003-333462 A Japanese Patent Laid-Open No. 3-89686 JP-A-4-160989 Japanese Utility Model Publication No. 2-44478 JP-A-6-260113 JP 2003-87819 A JP-A-6-292138

  However, when a mechanical mechanism is used as in Patent Documents 2, 3, and 4, there are problems in terms of responsiveness and space saving.

  Moreover, the method of using light control glass like the said patent document 5 becomes a thing which cannot disregard the increase in the cost by light control glass, or the reduction of transmitted light.

  In addition, the aspect ratio conversion device that displays an arbitrary color on the side panel portion as in the above-mentioned Patent Document 6 is excellent in that the non-image portion can be easily made inconspicuous, but the side panel portion has a self-luminous color. In addition, since the frame has a light-receiving color, there is a tendency that the side panel portion is unavoidably expressed. In addition, in such an aspect ratio conversion device, the color of the side panel part, which is a non-video part, is fixedly set, so that the side panel part may become conspicuous due to fluctuations in the environment and situation of video viewing There is sex.

  Therefore, an object of the present invention is to provide an image display device that does not require a mechanical mechanism or a mask made of light control glass and can make a non-image portion inconspicuous with respect to a frame.

  In order to solve the above problems, a first video display device according to the present invention includes: (a) a video display unit having a predetermined effective area and capable of displaying video in the effective area; and (b) a video display unit. An attached outer frame having an opening corresponding to the outline of the effective area and (c) an image having an image size equal to or smaller than the size of the effective area is displayed in a limited display area that is a part of the effective area of the image display unit A predetermined first color associated with the color of the exterior frame can be displayed in a non-video area excluding the restricted display area in the effective area, and the first color is displayed in the non-video area A display control device that displays a predetermined second color having a low similarity to the color of the exterior frame and the first color in a linear region at the boundary between the limited display region and the non-video region. .

  In the video display device, when the display control device displays the first color in the non-video area, the color of the exterior frame and the first color are displayed in the linear area at the boundary between the limited display area and the non-video area. On the other hand, since the predetermined second color having low similarity is displayed, the boundary between the restricted display area and the non-video area is emphasized by the linear area, and the non-video area is easily recognized as being integrated with the exterior frame. . In other words, as a result of the outer area of the restricted display area being drawn out by the linear area, the non-video area becomes less noticeable or easily viewed as a single unit with the exterior frame. Appreciate the video without discomfort

  According to a specific aspect or aspect of the present invention, in the video display device, the predetermined effective area has a first aspect ratio, and the video to be displayed in the restricted display area is a second aspect ratio different from the first aspect ratio. Have In this case, it is possible to provide a video display device that adapts to the video aspect ratio as if the exterior frame changes.

  According to another specific aspect or aspect of the present invention, in the video display device, the display control device sets a limited display area for the video with the second aspect ratio to the maximum within the effective area, and a non-video area. When the first color is displayed, the predetermined second color is also displayed in the linear region at the boundary between the effective region and the exterior frame. In this case, the video of the second aspect ratio is displayed at the maximum, and a place where the restricted display area and the exterior frame are in contact with each other is formed. As a result, the outer edge of the restricted display area is formed by the linear area. It is possible to make the image stand out, and the video formed in the restricted display area can be viewed without a sense of incongruity.

  Further, in another specific aspect of the present invention, an environmental sensor that detects an environmental change around the video display unit is further provided, and the display control device displays the first color in the non-video area based on the output of the environmental sensor. To change. In this case, the non-image area can be maintained in a state where it can be easily viewed as an integral part of the exterior frame regardless of changes in the surrounding environment, so that the image formed in the restricted display area can always be viewed without a sense of incongruity.

  In yet another specific aspect of the present invention, the display control device changes the hue and brightness of the first color displayed in the non-video area according to the output of the environment sensor. In this case, it is possible to respond flexibly and variously to changes in the surrounding environment.

  In still another specific aspect of the present invention, a frame sensor that detects replacement of the exterior frame is further provided, and the first color is switched to one associated with the color of the exterior frame after replacement. In this case, the non-image area can be maintained in a state where it can be easily viewed as an integral part of the exterior frame, regardless of the replacement of the exterior frame, so that the image formed in the restricted display area can always be viewed without a sense of incongruity.

  In still another specific aspect of the present invention, the frame sensor detects the replacement of the exterior frame based on the output of the optical sensor provided behind the exterior frame. In this case, the color or the like of the exterior frame can be determined using transmitted light or the like of the exterior frame.

  In yet another specific aspect of the present invention, the first color has the same hue or a similar hue as the hue of the color of the exterior frame. In this case, the non-image area and the exterior frame are easily viewed as a single unit.

  In still another specific embodiment of the present invention, the second color is an achromatic color having a complementary color with respect to the hue of the color of the exterior frame or a similar hue of the complementary color, or an achromatic color having a brightness difference with respect to the color of the exterior frame. is there. In this case, the outer edge of the limited display area can be effectively enhanced without a sense of incongruity.

  The second video display device according to the present invention includes (a) a video display unit having a predetermined effective area and capable of displaying video in the effective area, and (b) an effective area attached to the video display unit. An exterior frame having an opening corresponding to the contour of the image, (c) a sensor for detecting an environmental change around the image display unit or replacement of the exterior frame, and (d) an image having an image size equal to or less than the size of the effective area. Can be displayed in a limited display area that is a part of the effective area of the video display unit, and the predetermined first color associated with the color of the exterior frame is excluded from the limited display area in the effective area. And a display control device that changes the first color displayed in the non-video area based on the output of the sensor when the first color is displayed in the non-video area.

  In the video display device, when the display control device displays the first color in the non-video area, the first color displayed in the non-video area is changed based on the output of the sensor. Corresponding to the exchange of the frames, the non-video area can be maintained in a state where it can be easily seen as an integral part of the exterior frame, and the video formed in the restricted display area can always be viewed without a sense of incongruity.

[First Embodiment]
FIG. 1 is a side view illustrating the overall structure of the rear projection apparatus according to the first embodiment of the present invention. The rear projection device 10 is a video display device for displaying moving images and still images. The rear projection device 10 includes a projector body 14 at the bottom of a case 12 that is a housing, and a reflection mirror 16 at the upper part on the back side in the case 12. A transmissive screen member 18 is provided on the front surface of the case 12. The image light emitted from the projector main body 14 travels obliquely upward and rearward substantially along the optical axis OA 1, is bent to the front side substantially along the optical axis OA 2 direction by the reflection mirror 16, and is transmitted to the transmission type screen member 18. Incident.

  The projector main body 14 includes a light source device 21 that generates light source light, a color division optical system 23 that divides the light source light from the light source device 21 into three colors of RGB, and illumination light of each color emitted from the color division optical system 23. The light modulator 25 composed of three liquid crystal light valves respectively illuminated by the light, the light combining optical system 27 that is a cross dichroic prism that combines the image light of each color from the light modulating unit 25, and the image light that has passed through the light combining optical system 27 And a projection lens 29 that is a projection optical system for projecting the image onto the transmission screen member 18. The projector main body 14 is positioned and fixed to the bottom of the case 12 by means (not shown). As is apparent from the figure, the image light from the projector main body 14 is incident on the transmissive screen member 18 in a state of being inclined as a whole along the optical axis OA2. For this reason, a rectangular sharp image is projected on the transmissive screen member 18 by appropriately displacing the projection lens 29 in a direction perpendicular to the optical axis OA1.

  The reflection mirror 16 is a trapezoidal plane mirror, and is positioned and fixed in the case 12 by means not shown.

  The transmissive screen member 18 is a laminate in which a Fresnel lens sheet is provided on the back side, a lenticular lens sheet is provided in the middle, and a front panel is provided on the front side. The transmission type screen member 18 is supported by a holder 31 that also serves as an opening forming mask, and is fixed in a state of being embedded in the front support frame 32 together with the holder 31. The transmissive screen member 18, the holder 31, and the front support frame 32 function as an image display unit for displaying an image. A rectangular exterior frame 41 is detachably attached to the front surface side of the transmissive screen member 18 along the outline of the transmissive screen member 18.

  The exterior frame 41 has an opening AP corresponding to the outline or outer edge of the effective area of the transmissive screen member 18. That is, when normal display is performed on the transmissive screen member 18, an image is displayed so as to fit exactly within the opening AP of the exterior frame 41. The effective area of the transmissive screen member 18 is an area where an image can be displayed on the transmissive screen member 18, as will be described in detail below. In this case, the effective area is a rectangle having an aspect ratio of 4: 3. .

  The exterior frame 41 has a concavo-convex pattern 41a for type identification on a part of the lower back surface. That is, the exterior frame 41 can be exchanged with another exterior frame of the same shape with different colors according to the user's preference etc., and the mechanical frame sensor 35 embedded in the front support frame 32 The type of the exterior frame 41 attached to the front support frame 32 can be automatically identified. Thereby, as will be described in detail below, a desired display corresponding to the color or the like of the exterior frame 41 can be performed in the transmissive screen member 18.

  FIG. 2A shows an upper part of the front surface of the rear projection apparatus 10 of FIG. 1, and FIG. 2B is a front view for explaining the replacement of the exterior frame.

  As shown in FIG. 2A, the exterior frame 41 is a belt-like frame corresponding to four sides of a quadrangle, and the effective area EA of the transmissive screen member 18 can be observed through the opening AP in the frame. it can. The effective area EA has an aspect ratio of 4: 3, and a normal size moving image or still image is displayed. As shown in FIG. 2B, the exterior frame 41 in FIG. 2A can be replaced with another exterior frame 141 having a different color or the like. In this case as well, the model can be automatically identified by the concave / convex pattern 41a provided on another exterior frame 141.

  3A corresponds to FIG. 2A and shows an example in which an image is displayed in a part of the effective area, and FIG. 3B shows an example corresponding to FIG. 2B.

  In the case shown in FIG. 3A, the limited display area LA in the center of the effective area EA of the transmissive screen member 18 surrounded by the first color outer frame 41 has a relatively horizontally long 16: 9 aspect ratio. And displays wide screen size moving images and still images without distortion or chipping. The upper non-video area TQ provided above the restricted display area LA and the lower non-video area BQ provided below are portions where no video exists, and have the same hue, similar hue, etc. with respect to the exterior frame 41. The first color is displayed. Further, the outer edge of the restricted display area LA, that is, the boundary between the left and right ends of the restricted display area LA and the exterior frame 41, and the border between the upper and lower ends of the restricted display area LA and the non-picture areas TQ and BQ are four sides of the rectangle. A linear frame region FL corresponding to is provided. The linear frame region FL displays a second color that is a complementary color that is not similar to the color of the exterior frame 41 or the like.

  As a result, the rear projection apparatus 10 can not only prevent the non-image areas TQ and BQ from floating with respect to the exterior frame 41, but also emphasize the four outer edges of the limited display area LA with the linear frame area FL. Since the exterior frame 41 and the non-image areas TQ and BQ are observed more integrally, an image having an aspect ratio different from that of the effective area EA formed in the limited display area LA can be viewed without a sense of incongruity. That is, the user feels as if the exterior frame 41 changes according to the aspect ratio of the video. Note that, when black is displayed in the non-image areas TQ and BQ, there is a possibility that a degree of burn-in may occur between the non-image areas TQ and BQ. However, in the rear projection apparatus 10, such a problem is unlikely to occur. .

  On the other hand, in the case shown in FIG. 3B, a second color exterior frame 141 different from the case of FIG. 3A is attached around the transmissive screen member 18. In this case, the same hue, similar hue, etc. are displayed as the first color in the upper non-video area TQ and the lower non-video area BQ with respect to the color of the exterior frame 141 (different from the case of FIG. 3A). To do. It should be noted that the color of the linear frame region FL can be changed conspicuously according to the color of the exterior frame 141 and the non-video regions TQ and BQ.

  As a result, in the rear projection apparatus 10, the exterior frames 41 and 141 and the non-image areas TQ and BQ are integrally observed before and after the replacement, even though the plurality of exterior frames 41 and 141 can be replaced. The video formed in the restricted display area LA can be viewed without a sense of incongruity.

  In the above description, the hue of the first color has been mainly described. However, as is apparent from the above, a hue that approximates the exterior frame 41 and that approximates brightness and saturation is used as the first color. It is desirable to do. In addition, the second color is not limited to a hue that is not similar to the exterior frame 41, but a similar hue can be used even if the hue is similar. For example, an achromatic color such as black or gray having a brightness difference with respect to the color of the exterior frame 41 may be used.

  FIG. 4 is a block diagram conceptually illustrating a part of the signal processing circuit built in the rear projection apparatus 10 of FIG. The signal processing circuit includes a video processing unit 51 to which an external video signal such as a video signal is input, a frame / line superposition unit 52 that superimposes a pseudo frame or a boundary line on the video signal output from the video processing unit 51, An operation unit 53 for setting an operation state by a user, a display unit 55 for forming image light to be displayed on the transmission type screen member 18 shown in FIG. 1 and the like, and a control unit 57 for comprehensively controlling these operations. Prepare. Among these, the image processing unit 51, the frame / line superimposing unit 52, and the control unit 57 are display control devices that adjust the state of the image to be projected onto the transmissive screen member 18 provided in the rear projection device 10. Yes.

  Among the signal processing circuits described above, the video processing unit 51 outputs information regarding whether an externally input video signal has an aspect ratio of 4: 3 or an aspect ratio of 16: 9 to the control unit 57. In addition, the video processing unit 51 performs processing on the video signal having the aspect ratio of 4: 3 so that the entire video fits in the effective area EA of the transmissive screen member 18 illustrated in FIG. As a result, the video corresponding to the video signal is displayed on the entire effective area EA without distortion or omission. On the other hand, the video processing unit 51 has an aspect that allows the entire video to fit within the effective area EA of the transmissive screen member 18 shown in FIG. 2A with respect to a video signal having a relatively horizontally long 16: 9 aspect ratio. Perform conversion processing. As a result, the video corresponding to the video signal is displayed in the limited display area LA between the upper and lower sides of the effective area EA and without distortion or omission as in the letterbox format (see FIG. 3A).

  When the drive signal output from the video processing unit 51 has a relatively horizontally long aspect ratio of 16: 9 like the latter, the frame / line superimposing unit 52, as shown in FIG. Signal processing is performed such that the first color having a similar hue related to the color of the exterior frame 41 is displayed in the non-video areas TQ and BQ above and below the restricted display area LA where the video corresponding to the video signal is displayed. Further, the frame / line superimposing unit 52, when the signal driven and output from the video processing unit 51 has a relatively horizontal aspect ratio of 16: 9, the linear frame region FL at the outer edge of the restricted display region LA. In addition, signal processing is performed to display a second color having low similarity to the color of the exterior frame 41 and the like. The above processing performed by the frame / line superimposing unit 52 is referred to as “frame superimposing processing”.

  The frame superimposing process will be specifically described. The frame / line superimposing unit 52 corresponds to the first color at a timing corresponding to the drawing of the upper non-video area TQ for a predetermined scanning line from the screen by, for example, a switching circuit. A pseudo frame signal is generated and output to the display unit 55. Further, the frame / line superimposing unit 52 is a pseudo frame corresponding to the second color at a timing corresponding to drawing of several scanning lines (upper side of the linear frame region FL) immediately before displaying the intermediate limited display region LA. A signal is generated and output to the display unit 55. Further, the frame / line superimposing unit 52 draws the scanning lines for displaying the intermediate restricted display area LA at the timing of the first and last several pixels of each scanning line (the left side and the right side of the linear frame area FL). A pseudo frame signal corresponding to the second color is generated and output to the display unit 55, and a drive signal corresponding to the video signal from the video processing unit 51 is generated and displayed on the display unit 55 except for the first and last. Output. Further, the frame / line superimposing unit 52 corresponds to the second color at a timing corresponding to drawing of several scanning lines (lower side of the linear frame region FL) immediately after displaying the intermediate limited display region LA. A pseudo frame signal is generated and output to the display unit 55. Further, the frame / line superimposing unit 52 generates a pseudo frame signal corresponding to the first color at a timing corresponding to the drawing of the lower no-picture area BQ of the predetermined scanning line segment from the bottom of the screen and outputs the pseudo frame signal to the display unit 55. .

  The above operation is an example, and a frame memory corresponding to the effective area EA of the transmissive screen member 18 shown in FIG. 2A can be provided. In this case, a predetermined number of upper and lower rows in the frame memory. The pixel signals corresponding to the first color are written and held in the corresponding pixels (corresponding to the non-picture areas TQ and BQ in FIG. 3A). Also, a pixel signal corresponding to the video signal from the video processing unit 51 is written and held in a central rectangular area (corresponding to the restricted display area LA in FIG. 3A) of the frame memory. Further, the pixel signal corresponding to the second color is written and held in a rectangular frame area corresponding to the outer edge of the limited display area LA in the frame memory.

  The operation unit 53 outputs a control signal to the control unit 57 to switch the operation mode of the rear projection apparatus 10. For example, letterbox display in which black is displayed in the non-video areas TQ and BQ without displaying the first color related to the color of the exterior frame 41 in the non-video areas TQ and BQ may be performed. In addition, the user's favorite colors can be displayed in the non-video areas TQ and BQ. Furthermore, an operation mode for performing zooming, panorama display, or the like can be selected.

  The display unit 55 includes three liquid crystal light valves 25a, 25b, and 25c constituting the light modulation unit 25, and a driving circuit corresponding to each color liquid crystal display panel included in each liquid crystal light valve 25a, 25b, and 25c. Etc. These drive circuits operate in accordance with the video signal that has passed through the frame / line superimposing unit 52.

  The control unit 57 receives information on whether the video signal has an aspect ratio of 4: 3 or 16: 9 from the video processing unit 51. The control unit 57 operates in the operation mode set by the operation unit 53. In the normal operation mode, when the input signal is a video signal having an aspect ratio of 4: 3, the control unit 57 does not perform processing in the frame / line superimposing unit 52, and the video signal from the video processing unit 51 is used as it is. The data is output to the display unit 55. That is, the control unit 57 displays an image on the entire effective area EA of the transmissive screen member 18 illustrated in FIG. On the other hand, when the input signal is a relatively horizontal video signal having an aspect ratio of 16: 9, the control unit 57 causes the frame / line superimposing unit 52 to display a frame at an appropriate position of the transmissive screen member 18. And the video signal after the frame superimposing process is output to the display unit 55. That is, the control unit 57 causes the frame / line superimposing unit 52 to perform color display corresponding to the non-image areas TQ and BQ and the linear frame area FL of the transmissive screen member 18 illustrated in FIG. be able to. At this time, an image having an aspect ratio of 16: 9 is displayed in the restricted display area LA surrounded by the linear frame area FL.

  Based on the detection signal from the frame sensor 35, the controller 57 determines which of the outer frame 41 in FIG. 2A and the outer frame 141 in FIG. 2B is mounted around the transmissive screen member 18. The frame superimposing process of the frame / line superimposing unit 52 can be switched depending on which of the two exterior frames 41 and 141 is attached. That is, when the exterior frame 41 shown in FIG. 3A is attached, the color corresponding to the exterior frame 41 is displayed in the non-picture areas TQ and BQ, and the exterior frame 141 shown in FIG. If so, the colors corresponding to the exterior frame 141 are displayed in the non-video areas TQ and BQ.

[Second Embodiment]
FIG. 5 is a front view for explaining a rear projection apparatus according to the second embodiment. This rear projection apparatus 210 is a modification of the rear projection apparatus 10 according to the first embodiment shown in FIG. 1 and the like, and parts not specifically described are the same as those of the apparatus of the first embodiment.

  In the case of the rear projection device 210, the transmissive screen member 218 and the exterior frame 241 have an aspect ratio of 16: 9 and usually display an image with a wide screen size.

  On the other hand, when a normal size image is displayed on the relatively horizontally long transmissive screen member 218 as described above, a frame superimposing process for displaying a frame in an unused portion of the effective area EA of the transmissive screen member 218 is performed. . That is, the limited display area LA2 in the center has an aspect ratio of 4: 3, and displays a normal size moving image or still image without distortion or missing. The left non-video area LQ provided on the left side of the restricted display area LA2 and the right non-video area RQ provided on the right side are portions where no video exists, and have the same hue, similar hue, etc. with respect to the exterior frame 241. The first color is displayed. Furthermore, the outer edge of the restricted display area LA2, that is, the boundary between the upper and lower ends of the restricted display area LA2 and the exterior frame 241, and the left and right edges of the restricted display area LA2 and the non-picture areas LQ and RQ are four rectangular sides. A linear frame region FL2 corresponding to is provided. The linear frame region FL2 displays a second color that is a complementary color that is not similar to the color of the exterior frame 241 or the like.

  As a result, in the rear projection apparatus 210, not only the non-picture areas LQ and RQ can be prevented from being displayed so as to float on the exterior frame 241, but the four outer edges of the limited display area LA2 are linear frame areas. Emphasized by FL2, the exterior frame 241 and the non-picture areas LQ, RQ are more integrally observed, so that a normal aspect ratio picture formed in the restricted display area LA2 can be viewed without a sense of incongruity. In the rear projection apparatus 210, the exterior frame 241 and the non-image areas LQ and RQ are integrally observed before and after the replacement, even though the plurality of exterior frames 241 can be replaced, and formed in the restricted display area LA2. You can appreciate the recorded images naturally.

[Third Embodiment]
FIG. 6A and FIG. 6B are front views illustrating a rear projection apparatus according to the third embodiment.

  FIG. 6A is a modification of the display example shown in FIG. 3A. In the transmissive screen member 18, lines are formed only at the boundaries between the upper and lower ends of the limited display area LA and the non-video areas TQ and BQ. A frame region FL ′ is displayed. In these linear frame regions FL ′, as in the case of the first embodiment, a second color that is a complementary color that is not similar to the color of the exterior frame 41 or the like is displayed. In the upper and lower non-video areas TQ and BQ, the first color having the same hue, similar hue, etc. is displayed on the exterior frame 41. Also in this case, the boundary between the limited display area LA and the non-video areas TQ and BQ is emphasized by the linear frame area FL ′, and the exterior frame 41 and the non-video areas TQ and BQ are observed more integrally.

  FIG. 6B is a modification of the display example shown in FIG. 5. In the transmissive screen member 218, the linear frame region is only at the boundary between the left and right ends of the limited display region LA 2 and the non-video regions LQ and RQ. FL2 'is displayed. In these linear frame areas FL2 ', as in the case of the second embodiment, a second color that is a complementary color that is not similar to the color of the exterior frame 241 or the like is displayed. In the left and right non-video areas LQ and RQ, the first color having the same hue, similar hue, and the like is displayed with respect to the exterior frame 241. Also in this case, the boundary between the limited display area LA2 and the non-video areas LQ and RQ is emphasized by the linear frame area FL2 ', and the exterior frame 241 and the non-video areas LQ and RQ are observed more integrally.

[Fourth Embodiment]
FIG. 7A and FIG. 7B are front views for explaining a rear projection device according to the fourth embodiment.

  FIG. 7A is a modification of the display example shown in FIG. 6A, and the non-image areas TQ and BQ are displayed on the upper and lower ends of the limited display area LA on the transmissive screen member 18. A portion corresponding to the linear frame region FL ′ in FIG. 6A is not displayed. In the upper and lower non-video areas TQ and BQ, the first color having the same hue, similar hue, etc. is displayed on the exterior frame 41. In this case, it is possible to prevent the non-image areas TQ and BQ from floating with respect to the exterior frame 41.

  FIG. 7B is a modification of the display example shown in FIG. 6B. In the transmissive screen member 218, the non-video areas LQ and RQ are displayed on the left and right ends of the limited display area LA2. A portion corresponding to the linear frame region FL2 ′ in FIG. 6B is not displayed. In the left and right non-video areas LQ and RQ, the first color having the same hue, similar hue, and the like is displayed with respect to the exterior frame 241. In this case, it is possible to prevent the non-video areas LQ and RQ from floating with respect to the exterior frame 241.

[Fifth Embodiment]
FIG. 8 is a front view for explaining a rear projection apparatus according to the fifth embodiment.

  FIG. 8 is a modification of the display example shown in FIG. 5, and a limited display area LA that does not contact the surrounding exterior frame 241 is provided at the center of the transmissive screen member 218. That is, the limited display area LA is slightly smaller than the transmission screen member 218 in the exterior frame 241. In the illustrated example, the aspect ratio of the limited display area LA and the aspect ratio of the transmissive screen member 218 are different from each other, but the aspect ratios of the two can be matched. This embodiment corresponds to a case where the size of the video is made smaller than the effective area by resizing processing or the like, and is suitable for displaying a PC video or the like. In this case, the video processing unit 51 or the control unit 57 of the signal processing circuit shown in FIG. 4 does not perform processing that maximizes the display area according to the aspect ratio of the video signal, but includes video reduction processing and the like. Size management is performed. Specifically, for example, a resize processing mode is set in the control unit 57 in accordance with a resize command signal from the operation unit 53, and the video processing unit 51 applies a video signal to the video signal based on the control signal from the control unit 57. A resize process is performed so that the display is slightly smaller than the transmissive screen member 218.

  In the case of this embodiment, a relatively wide non-video area PQ is displayed on the outer periphery of the restricted display area LA that displays the resized video so as to surround the upper, lower, left, and right. In addition, a linear frame area FL is displayed at the boundary between the restricted display area LA and the non-video area PQ. Here, as in the case of the first embodiment, the first color having the same hue, similar hue, etc. is displayed on the exterior frame 241 in the non-video area PQ. Further, in the linear frame region FL, a second color that is a complementary color that is not similar to the color of the exterior frame 241 or the like is displayed. Also in this case, the boundary between the restricted display area LA and the non-video area PQ is emphasized by the linear frame area FL, and the exterior frame 241 and the non-video area PQ are observed more integrally.

[Sixth Embodiment]
FIGS. 9A and 9B are partially enlarged cross-sectional views for explaining a rear projection apparatus according to the sixth embodiment.

  FIG. 9A is a modification of the rear projection apparatus 10 according to the first embodiment shown in FIG. 1, and an environment sensor 535 for detecting the amount of light is provided behind the exterior frame 41 (141, 241). It has a structure. The environmental sensor 535 is housed in a container 537 and is fixed to the back surface of the exterior frame 41 (141, 241), and a condensing lens 539 provided in an opening 41c formed at an appropriate position of the exterior frame 41 (141, 241). Opposite to. By using this environment sensor 535, the brightness of the surrounding environment of the rear projection device (for example, a bright room, a dark room, daytime, evening, nighttime, etc.) can be detected. Thereby, the processing content in the frame and line superimposing part 52 of FIG. 4 can be changed. Specifically, the detection result of the environment sensor 535 is taken into the control unit 57 of FIG. 4, and the operation of the frame / line superimposing unit 52 is changed based on the detection result, and the non-video shown in FIG. The brightness setting of the first color displayed in the areas TQ, BQ, LQ, RQ, and PQ is changed, and the brightness setting and hue setting of the second color displayed in the linear frame areas FL and FL2 are changed. As a result, the non-image areas TQ, BQ, LQ, RQ, and PQ are maintained in a state in which they are easily viewed integrally with the exterior frame 41 (141, 241), etc., regardless of changes in brightness of the surrounding environment. Therefore, it is possible to always appreciate the video formed in the restricted display area LA without feeling uncomfortable.

  FIG. 9B is a modification of the rear projection apparatus 10 according to the first embodiment shown in FIG. 1, and a frame environment sensor 635 for color and light quantity detection behind the exterior frame 41 (141, 241). The structure is provided. The frame environment sensor 635 is a color sensor housed in the container 637 and fixed at a suitable position facing the back of the exterior frame 41 (141, 241), and an observation window formed at a suitable position on the exterior frame 41 (141, 241). It faces the condenser lens 539 provided behind 41d. The observation window 41d corresponds to a circular transparent portion 41g formed on a part of the light-shielding substrate 41f, and can take in external light through the surface coating 41h of the exterior frame 41 (141, 241). ing. By using this frame environment sensor 635, not only the brightness of the surrounding environment of the rear projection apparatus can be detected, but also the color of the exterior frame 41 (141, 241) can be determined. Accordingly, the processing content in the frame / line superimposing unit 52 in FIG. 4 can be changed in accordance with a change in the surrounding environment or replacement of the exterior frame 41 (141, 241). Specifically, the output of the frame environment sensor 635 is taken into the control unit 57 in FIG. 4, and the operation of the frame / line superimposing unit 52 is changed based on the detection result, so that the non-video areas TQ, BQ, LQ, RQ , PQ to change the hue setting and brightness setting of the first color, and further change the hue setting and brightness setting of the second color to be displayed in the linear frame regions FL, FL ′, FL2, FL2 ′. As a result, the non-image areas TQ, BQ, LQ, RQ, and PQ are easily viewed as a single unit with the exterior frame 41 (141, 241) regardless of the change in brightness of the surrounding environment or the replacement of the exterior frame 41 (141, 241). Maintained. Therefore, the image formed in the restricted display area LA can always be viewed without a sense of incongruity.

  Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments. For example, the above technique can be applied not only to the rear projection apparatus 10 but also to various flat displays (FPD) such as a liquid crystal display (LCD) and a plasma display (PDP). In other words, a non-image area of a color that approximates the color of the exterior frame is provided between the image display unit of the flat display and the surrounding exterior frame, and a color line that does not approximate the color of the exterior frame around the central limited display area. A frame region is provided. At this time, the hue, light amount, and the like of the non-image area and the linear frame area can be adjusted according to the exchange of the exterior frame and the change in the surrounding environment.

  Further, in each of the above embodiments, the widths of the linear frame regions FL, FL ', FL2, and FL2' are exemplifications, and may be lines or bands having various widths.

It is a side view of the rear projection device concerning a 1st embodiment. (A) shows the upper front part of the apparatus of FIG. 1, (b) demonstrates replacement | exchange of an exterior frame. FIG. 2A is a partial video display example corresponding to FIG. 2A, and FIG. 2B is a partial video display example corresponding to FIG. It is a block diagram of the signal processing circuit built in the apparatus of FIG. It is a front view explaining the apparatus which concerns on 2nd Embodiment. (A), (b) is a front view explaining the apparatus which concerns on 3rd Embodiment. (A), (b) is a front view explaining the apparatus which concerns on 4th Embodiment. It is a front view explaining the apparatus which concerns on 5th Embodiment. (A), (b) is the elements on larger scale explaining the apparatus of 5th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Rear projection apparatus, 14 ... Projector main body, 16 ... Reflection mirror, 18 ... Transmission type screen member, 25 ... Light modulation part, 25a, 25b, 25c ... Liquid crystal light valve, 29 ... Projection lens, 32 ... Front support frame, 35: Frame sensor, 41: Exterior frame, 51: Video processing unit, 52: Frame / line superposition unit, 53: Operation unit, 55: Display unit, 57: Control unit, AP: Opening, BQ: Lower non-video area EA ... Effective area, FL ... Linear frame area, LA ... Limited display area, LQ ... Left side no video area, RQ ... Right side no video area, TQ ... Upper no picture area

Claims (10)

A video display unit having a predetermined effective area and capable of displaying video in the effective area;
An exterior frame attached to the video display unit and having an opening corresponding to the outline of the effective area;
A video having a video size less than or equal to the size of the effective area can be displayed in a limited display area that is a part of the effective area of the video display unit, and a predetermined associated with the color of the exterior frame The first color can be displayed in a non-video area excluding the limited display area in the effective area, and when the first color is displayed in the non-video area, the limited display area and the non-video An image display device comprising: a display control device configured to display a predetermined second color having low similarity to the color of the exterior frame and the first color in a linear region at a boundary with the region.   2. The video display apparatus according to claim 1, wherein the predetermined effective area has a first aspect ratio, and an image to be displayed in the restricted display area has a second aspect ratio different from the first aspect ratio. .   The display control device sets the limited display area for the video with the second aspect ratio to the maximum within the effective area, and displays the effective area and the effective color when the first color is displayed in the non-video area. The video display device according to claim 2, wherein the predetermined second color is also displayed in a linear region at a boundary with the exterior frame.   An environmental sensor for detecting an environmental change around the video display unit is further provided, wherein the display control device changes the first color displayed in the non-video area based on an output of the environmental sensor. The video display device according to any one of claims 1 to 3.   The video display device according to claim 4, wherein the display control device changes a hue and brightness of the first color displayed in the non-video area according to an output of the environmental sensor.   6. The apparatus according to claim 1, further comprising a frame sensor that detects replacement of the exterior frame, wherein the first color is switched to one associated with the color of the exterior frame after replacement. The video display device according to item.   The video display device according to claim 6, wherein the frame sensor detects replacement of the exterior frame based on an output of an optical sensor provided behind the exterior frame.   8. The video display device according to claim 1, wherein the first color has the same hue or a similar hue as a hue of the color of the exterior frame. 9.   The second color is a complementary color with respect to a hue of the color of the exterior frame or a similar hue of the complementary color, or an achromatic color having a lightness difference with respect to a color of the exterior frame. The video display device according to claim 7. A video display unit having a predetermined effective area and capable of displaying video in the effective area;
An exterior frame attached to the video display unit and having an opening corresponding to the outline of the effective area;
A sensor for detecting an environmental change around the image display unit or replacement of the exterior frame;
A video having a video size less than or equal to the size of the effective area can be displayed in a limited display area that is a part of the effective area of the video display unit, and a predetermined associated with the color of the exterior frame The first color can be displayed in a non-video area excluding the limited display area in the effective area, and when the first color is displayed in the non-video area, the first color is based on the output of the sensor. An image display device comprising: a display control device that changes the first color to be displayed in a non-image area.

Images