JP2010258940A - Display device with automatic display character adjustment function - Google Patents

Abstract

[PROBLEMS] To determine the readability of a character displayed on a display device based on the natural behavior of a viewer, and to automatically display the character size, character color, and character so that the display is automatically readable without the viewer's instruction. Adjust the display method such as background color and text decoration.
A camera 12 captures the eyes of a viewer 11 before and after displaying characters on a display device 10. When the viewer's eyes change the shape of the eyes as in the state 13 before displaying characters and the state 14 after displaying characters, it is determined that the characters displayed for the viewer are difficult to read and displayed. The display method such as the character background, character color, and character size displayed on the device 10 is changed without any instruction from the viewer 11 and automatically changed to an easy-to-read display.
[Selection] Figure 1

Description

  The present invention relates to a display device with a display character automatic adjustment function, and in particular, when a viewer who reads a character drawn on the display device feels it is difficult to read the character, the display method of the character and its background is changed. In addition, the present invention relates to an assistive technology that can be read comfortably.

  In a conventional display device, the size of characters displayed in an OSD such as a menu or EPG or subtitles is constant. For this reason, in a display device such as a television receiver or a portable terminal, the size of characters to be displayed is set manually in advance by the viewer, or changed depending on the distance between the display device and the viewer.

  Patent Document 1 discloses an example in which the distance between the viewer and the display device is calculated using ultrasonic waves to calculate whether the distance is shorter or longer than the recommended distance, and the viewer is notified of the perspective on a screen or the like.

  Patent Document 2 discloses a display device that can detect a distance between a display screen and an input device and switch an on-screen display to an image size corresponding to the measurement distance.

  Patent Document 3 discloses a television receiver that determines an optimum distance from the number of viewers using a far-infrared camera and the distance from the television to each person and automatically adjusts the video quality.

JP-A-5-203742 Japanese Patent Laid-Open No. 7-274087 JP 2008-72561 A

In Patent Document 1, it is not determined whether an object that reflects ultrasonic waves is a human body.
In Patent Document 2, the remote control device used when detecting the distance between the viewer and the display device is on the viewer side, and only the viewer having the remote control device is targeted. Also, if the hand or arm is inconvenient, the remote control device cannot be carried or operated.

  In Patent Document 3, the distance is determined using ultrasonic waves as in Patent Document 1, and it is determined whether the human body is based on infrared radiation energy from the object. However, it is difficult to determine whether or not the viewer can easily read characters only by the distance between the viewer and the display device. For example, even if the character size is changed to some extent, it may be considered that the change in size is insufficient for a viewer with weak eyesight. Also, for example, when a still image or video is displayed on the background and the font size is always increased, the text is enlarged even when the viewer is not reading the text, and the still image or video can be viewed. It will be a hindrance.

  The present invention has been made in view of the above points, and the characters displayed on the display device are easy to read for the viewer by changing the shape of the eyes due to natural behavior when the viewer can read and not read the characters. It is an object of the present invention to provide a display device with a display character automatic adjustment function that appropriately performs automatic adjustment of size, character color, character background color, character decoration, and the like.

In order to solve the above-described problems, the present invention includes a control device and a display screen, performs signal processing on received content, and displays video or the video and characters at a predetermined time according to the content. In the display device for displaying on the display screen,
The character display automatic adjustment unit includes a camera and a character display automatic adjustment unit. The character display automatic adjustment unit captures the eyes of the viewer before and after displaying the characters on the display screen, respectively, and the viewer's eyes When the character becomes thinner after display than before the character, it is determined that the character displayed by the viewer is difficult to read, and the character is automatically changed to a display that is easy to read. To do.

  According to the present invention, the viewer's natural behavior determines the readability of the displayed character, and the character size, character color, and character Adjust the display method such as background color and text decoration. This eliminates the need for the viewer to remember or instruct the display character change as a command like a gesture.

It is a figure which shows the structure of the display apparatus which shows the conceptual diagram of this invention, and the state of the eyes of the viewer made into a measuring object. It is a figure which shows the relationship between the display character used as the control object of this invention, and a content. It is a figure which shows the example of the display screen by the display apparatus with a display character automatic adjustment function of this invention. 1 is a system configuration diagram of a display device according to a first embodiment of the present invention. It is a time chart explaining operation | movement of the display character automatic adjustment function in 1st Example of this invention. It is a flowchart explaining operation | movement of the display character automatic adjustment function in 1st Example of this invention. It is a figure which shows the state of the viewer's eyes of a normal viewing state. It is a figure which shows a viewer's state when a display is hard to read. It is a system block diagram of the display apparatus which becomes the 2nd Example of this invention. It is a flowchart explaining operation | movement of the display character automatic adjustment function in 2nd Example of this invention. It is a system block diagram of the display apparatus which becomes the 3rd Example of this invention. It is a system configuration | structure figure of the display apparatus which becomes the 4th Example of this invention. It is a flowchart explaining operation | movement of the display character automatic adjustment function in the 4th Example of this invention. It is a system configuration | structure figure of the display apparatus which becomes the 5th Example of this invention. It is a system configuration | structure figure of the display apparatus which becomes the 6th Example of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
First, the basic concept of the present invention will be described. FIG. 1 is a diagram showing a configuration of a display device with a display character automatic adjustment function showing a conceptual diagram of the present invention and a state of a viewer's eye as a measurement target. The control device 15 of the display device 100 has a display character automatic adjustment function, performs signal processing of the received content 20, and displays only video or video and characters at a predetermined time according to the content of the content 20. It is displayed on the display screen 10 of the apparatus and the sound is output. The eyes of the viewer 11 before and after displaying the characters on the display screen 10 are photographed by the camera 12 respectively. Reference numeral 13 denotes the viewer's eyes before displaying characters, and reference numeral 14 denotes the viewer's eyes after displaying characters. As shown in FIG. 1, when the viewer's eyes change their shapes, such as the state 13 before displaying the characters and the state 14 after displaying the characters, the control device 15 causes the viewer to It is determined that the displayed characters are difficult to read. Note that the viewer to be measured has a predetermined distance from the display screen 10 set in advance according to the size of the display screen, the visual acuity of the target viewer, etc., for example, a distance from the display screen 10 of 2 m to A viewer within a range of about 10 m.

  In the present invention, the case of “the eye shape has changed” is not an instantaneous state change caused by the viewer's blinking, but a continuous state change accompanying the viewer's narrowing or enlargement of the eye, in other words, Then, it means a substantial shape change for viewing the display screen.

  When a change in the shape of the eyes is detected, the control device 15 causes the display device 10 to display at least one of various display methods such as character size, character color, character background color, and character decoration, or a combination thereof. The display method according to is automatically changed even if there is no instruction from the viewer 11 and is changed to a display that is easy for the viewer to read. Then, when it can be determined that the displayed characters are easy to read for the viewer, for example, when the viewer's eye shape returns to the non-display state of the characters, the change in the display method is stopped. On the other hand, when the viewer does not read the characters, the display of the characters is returned to the state before the change so as not to disturb the viewing of contents such as still images and moving images.

  In the present invention, the “character” whose display method is to be changed is not a character included as a picture in the video on the sending side, but a character that is combined with the video by the processing on the display device and output. . As a specific example, in digital TV and DVD, subtitles, subtitle supervision, OSD (menu or EPG), etc. are “characters” that are to be changed in display method (display method) in the present invention.

  FIG. 2 shows the relationship between display characters and contents to be controlled by the present invention. The content 20 sent to the display device generally includes time data 30, video data 40, audio data 50, and character data 60. The time data 30 includes reference time information 31 related to the content. There may be no reference time depending on the type of content. In this case, the time generated on the display device side is used. The video data 40 includes information 41 related to display time and information 42 related to video. The audio data 50 includes information 51 relating to output time and information 52 relating to audio. The character data 60 includes information 61 related to display time and information 62 related to characters.

  Next, FIG. 3 shows an example of a display screen by the display device with a display character automatic adjustment function of the present invention. FIG. 3A shows a display state of video only. The characters in the display screen 10 are the characters (42) included in the video data 40. On the other hand, FIG. 3A shows a display state of only video. In the display screen 10, in addition to the characters included in the video data 40, characters including character data 60 such as “earthquake breaking news” and “news breaking news” are also displayed.

  According to the present invention, the readability of the characters displayed as the character data 60 is determined based on a change in the state of the viewer's eyes, in other words, a natural behavior when the viewer is viewing the display screen 10, and the viewer Adjust the display method such as the character size, character color, character background color, and character decoration so that the display is automatically readable even if there is no instruction. This eliminates the need for the viewer to remember or instruct the display character change as a command like a gesture.

A first embodiment of the display device with automatic display character adjustment function of the present invention will be described with reference to FIGS.
First, FIG. 4 shows a functional block diagram necessary for the display device according to the first embodiment of the present invention. A display device 100 according to the first embodiment of the present invention includes a content input unit 101, a video / character information separation unit 102, a video decoding unit 103, a display character determination unit 104, and a display character as a control device 15. A decoding unit 105, a video synthesis unit 106, and a video output unit 107 are provided. The control device 15 of the display device 100 further includes a viewer image input unit 108, a timing setting unit 109, an eye shape detection unit 110, a shape change determination unit 111, and a display change control unit 112 as a display character automatic adjustment unit 120. It has. The control device 15 including the display character automatic adjustment unit 120 includes a CPU, a memory, and a data processor that holds a program, and has a function of realizing processing as described in FIGS. 5 and 6. The function of the display character automatic adjustment unit can be obtained by executing arithmetic processing based on various programs by the CPU.

  With reference to the time chart of FIG. 5 and the flowchart of FIG. 6, the operation related to the automatic adjustment of display characters by the control device in the first embodiment of the present invention will be described. 5 shows (1) acquisition of character information included in content, (2) presence / absence of character display on a display device, (3) timing of viewer's eye shape detection, and (4) control of display characters. Shows the relationship between the timings.

  The outline of the execution process of the present embodiment will be described below with reference to FIGS. 4 and 5 and the flowchart of FIG.

  First, the content information input from the content input means 101 (step 140 in FIG. 6) is determined by the video / character information separation means 102 for the presence or absence of character information (step 141), and is separated into character information and video information. And recorded in a storage means such as a buffer.

  Next, the video information is displayed on the display screen 10 which is decoded into video by the video decoding means 103 (step 142).

  The eye shape detection means 110 detects the viewer's eyes from the video (step 151) acquired by the viewer video input means 108 (step 152), and the detected eye shape is detected by the edge detection means. As shown in FIGS. 7A and 7B, the distance between the width and height of the viewer and the ratio thereof are obtained (step 153), and the result is stored in the storage means (step 154). The time at which the viewer's video is acquired and image-processed is specified by the timing setting means 109, and is executed at the timing indicated by the arrow in the time chart of FIG.

  On the other hand, regarding the character information, the display character determination unit 104 acquires the display time of the corresponding character, and the display time is set in the timing setting unit 109. Needless to say, the initial state is set in advance for the display of the size of the character to be displayed, the color of the character, the background, and the like. The character information is displayed on the display screen 10 at the designated time (steps 143 and 144).

  The eye shape detection means 110 detects the viewer's eyes from the video (step 155) acquired by the viewer video input means 108 (step 156), and the detected eye shape is detected by the edge detection means (110). ), The eye edge strength (180, 182, 0190, 192) is measured as shown in FIGS. 7A and 7B, and the viewer's eye width (181, 191) and height ( 183, 193) and their ratios (step 157), and the results are stored in the storage means. The viewer's video acquisition / image processing is executed at a timing as indicated by an arrow in the time chart of FIG.

  Next, the shape change determination means 111 compares the shape of the eye when the character is displayed and when it is not displayed (step 158), and the character displayed to the viewer is read due to the change in the shape of the eye. Determine whether it is easy. That is, comparing the shape of the viewer's eyes, the ratio of the width and height of the eyes changes, in other words, if the ratio of the width to the height of the eyes is large, It is determined that the eyes are narrowed because it is difficult to read the characters. More specifically, when the ratio changes by a predetermined threshold value or more, for example, 5% or more, it is determined that the eyes are narrowed.

  Note that instead of the ratio between the width and height of the eyes, a change in the circularity of the eyes may be detected. Alternatively, it may be detected by an area ratio between the pupil in the eye (which usually hardly changes when watching TV) and the area of another region in the eye (which narrows when the viewer narrows his eyes). Good.

  When the shape change determination unit 111 determines that the viewer is narrowing the eyes while displaying characters (YES in step 158), the display change control unit 112 displays the characters via the display character decoding unit 105. The display method such as the character size, character color and background is changed (step 160). When it is determined that there is no change in the viewer's eye state (NO in step 158), the character state to be displayed is displayed normally or maintained in the previous state (step 159).

The above processing is repeated until the end of the display time (NO in step 145). When the display time ends (YES in step 145), the process proceeds to the next character information display processing.
Returning to FIG. 4, the video composition means 106 synthesizes characters and video. The video output unit 107 outputs the video synthesized by the video synthesis unit 106.

  With the above operation, the display character automatic adjustment unit 120 can change the character display method when it is difficult for the viewer to read the characters displayed on the display device.

  According to the present embodiment, the readability of the displayed character is determined by the viewer's natural behavior, and the character size, character color, and character are automatically displayed so that the display is automatically readable without the viewer's instruction. Adjust the display method such as background color and text decoration. This eliminates the need for the viewer to remember or instruct the display character change as a command like a gesture.

  FIG. 8 is a functional block diagram necessary for a display device according to the second embodiment of the present invention. A display device 200 according to the second embodiment of the present invention includes a content input unit 201, a video / character information separation unit 202, a video decoding unit 203, a display character determination unit 204, a display character decoding unit 205, A video composition unit 206 and a video output unit 207 are provided. Further, the display character automatic adjustment unit 220 includes a viewer video input unit 208, a timing setting unit 209, a line-of-sight detection unit 210, a display character reading determination unit 211, an eye shape detection unit 212, and a shape change determination unit 213. And display change control means 214.

  The outline of the execution process of the present embodiment is as follows, and the flow of the determination process is performed by a method as shown in FIG. In the following description of the embodiment, differences from the first embodiment shown in FIG. 6 will be mainly described, and description of overlapping parts will be omitted.

First, the content information input from the content input unit 201 is separated into character information and video information by the video / character information separation unit 202.
The video information is decoded into video by the video decoding means 203.
Regarding the character information, the display character determination unit 204 acquires the display time of the corresponding character, and sets the display time in the timing setting unit 209.

  The line-of-sight detection unit 210 detects the viewer's line of sight from the video acquired by the viewer video input unit 208 (steps 251 and 252 in FIG. 9). The time for acquiring and processing the video is specified by the timing setting unit 209. The processing of the viewer video by the line-of-sight detection unit 210 is designated by the timing setting unit 209.

  The display character reading determination unit 211 compares the area where the viewer's line of sight is hit with the display character area, and determines that the character is being read when the viewer's line of sight is inside the character display area. (Steps 255-259).

  The eye shape detection unit 212 converts the viewer's eye shape from the video acquired by the viewer video input unit 208 by using the edge detection unit as shown in FIGS. 7A and 7B. The distance and ratio are calculated (steps 253 to 254, 260).

  The shape change determination means 212 compares the shape of the eye when the character is displayed and when it is not displayed (step 262).

  If the shape change determining means 213 determines that the viewer is narrowing the eyes while displaying characters (YES in step 262), the display change control means 214 displays the display via the display character decoding means 205. The display method such as the character size, character color and background is changed (step 263). If there is no change in the viewer's eye state (NO in step 262), normal display is performed or the previous display is maintained (step 261).

The image synthesizing unit 206 synthesizes characters and images.
The video output unit 207 outputs the video synthesized by the video synthesis unit 206.

  With the above operation, when the characters displayed by the viewer are difficult to read, the character display method can be automatically changed.

  According to the present embodiment, the readability of the displayed character is determined by the viewer's natural behavior, and the character size, character color, and character are automatically displayed so that the display is automatically readable without the viewer's instruction. Adjust the display method such as background color and text decoration.

  FIG. 10 is a block diagram necessary for a display device according to the third embodiment of the present invention. A display apparatus according to the third embodiment of the present invention includes a content input unit 301, a video / character information separation unit 302, a video decoding unit 303, a display character determination unit 304, a display character decoding unit 305, and a video. A synthesizing unit 306 and a video output unit 307 are provided. Further, as the display character automatic adjustment unit 320, the viewer video input means 308, the timing setting means 309, the line-of-sight detection means 310, the display character reading determination means 311, the eye shape detection means 312, and the shape change determination means 313. And a moving body detection unit 314 and a display change control unit 315.

The outline of the execution process of the present embodiment is as follows.
The content information input from the content input unit 301 is separated into character information and video information by the video / character information separation unit 302.
The video information is decoded into video by the video decoding means 305.
For the character information, the display character determination unit 304 acquires the display time of the corresponding character, and sets the display time in the timing setting unit 309.
The line-of-sight detection unit 310 detects the viewer's line of sight from the video acquired by the viewer video input unit 308. The processing of the viewer video by the line-of-sight detection unit 312 is designated by the timing setting unit 309.
The display character reading determination means 311 compares the area where the viewer's line of sight is hit with the display character area, and determines that the character is being read when the viewer's line of sight is inside the display area.
The eye shape detection unit 312 detects the shape of the viewer's eyes from the video acquired by the viewer video input unit 308 by using the edge detection unit as shown in FIGS. 7A and 7B. Find the distance and ratio.

The moving object detection unit 314 detects a moving object in the video using the video input from the viewer video input unit 308.
The shape change determination means 313 compares the shape of the eye when the character is displayed and when it is not displayed.

  In the moving object detection unit 314, when it is determined that the viewer who is watching moves and is replaced with another viewer, the shape of the eye when no character is displayed is acquired again.

  When the shape change determination unit 313 determines that the viewer is narrowing the eyes while displaying the character, the display change control unit 315 passes the display character decoding unit 305 to display the size of the character to be displayed. , Change the display method of text color, background, etc.

The video composition unit 306 synthesizes characters and video.
The video output unit 307 outputs the video synthesized by the video synthesis unit 306.

  With the above operation, when the character displayed by the viewer is difficult to read, the character display method can be automatically changed.

  A fourth embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a functional block diagram necessary for a display device according to the fourth embodiment of the present invention. The display apparatus according to this embodiment includes a content input unit 401, a video / character information separation unit 402, a video decoding unit 403, a display character determination unit 404, a display character decoding unit 405, a video composition unit 406, Video output means 407 is provided. Further, as the display character automatic adjustment unit 420, a viewer video input unit 408, a timing setting unit 409, an eye shape detection unit 410, a shape change determination unit 411, a display character reading unit 412, and a voice output unit 413 are provided. Prepare.

  The outline of the execution process of the present embodiment is as follows, and the flow of the determination process is as shown in the flowchart of FIG.

  The content information input from the content input unit 401 is separated into character information and video information by the video / character information separation unit 402.

The video information is decoded into video by the video decoding means 403.
Regarding the character information, the display character determination unit 404 acquires the display time of the corresponding character, and sets the display time in the timing setting unit 409.

  The eye shape detection unit 410 converts the viewer's eye shape from the video acquired by the viewer video input unit 408 by using the edge detection unit as shown in FIGS. 7A and 7B. The distance and ratio are calculated (steps 451 to 457). The time at which the viewer's video is acquired and processed is designated by the timing setting means 409.

  The shape change determination unit 411 compares the shape of the eye when the character is displayed and when the character is not displayed. When the shape change determination unit 411 determines that the viewer is narrowing the eyes while displaying the characters (YES in step 458), the display character reading unit 412 converts the displayed characters into voice information. The data is converted and output from the audio output means 413 (step 460). When there is no change in the viewer's eye state (NO in step 458), normal display is performed or the previous display is maintained (step 459).

  The video synthesizing unit 406 synthesizes characters and video.

  The video output unit 407 outputs the video synthesized by the video synthesis unit 406.

  According to the present embodiment, the readability of the displayed character is determined by the viewer's natural behavior, and the character size, character color, and character are automatically displayed so that the display is automatically readable without the viewer's instruction. Adjust the display method such as background color and text decoration. In addition, when the displayed characters are difficult to read, the information of the displayed characters is provided to the viewer by voice.

  FIG. 13 is a block diagram necessary for a display device according to the fifth embodiment of the present invention. In the display apparatus according to the second embodiment of the present invention, content input means 501, video / character information separation means 502, video decoding means 503, display character determination means 504, display character decoding means 505, and video composition Means 506 and video output means 507 are provided. Further, the display character automatic adjustment unit 220 includes a viewer video input unit 508, a timing setting unit 509, a line-of-sight detection unit 510, a display character reading determination unit 511, an eye shape detection unit 512, and a shape change determination unit 513. Display character reading means 514 and voice output means 515.

The outline of the execution process of the present embodiment is as follows.
The content information input from the content input unit 501 is separated into character information and video information by the video / character information separation unit 502.
The video information is decoded into video by the video decoding means 503.

  Regarding the character information, the display character determination unit 504 acquires the display time of the corresponding character, and sets the display time in the timing setting unit 509.

  The line-of-sight detection unit 510 detects the line of sight of the viewer from the video acquired by the viewer video input unit 508. The timing for acquiring and processing the video is designated by the timing setting means 509.

  The display character reading determination means 511 compares the area where the viewer's line of sight is hit with the display character area, and determines that the character is being read when the viewer's line of sight is inside the character display area. .

  The eye shape detection unit 512 converts the viewer's eye shape from the video acquired by the viewer video input unit 508 by using the edge detection unit as shown in FIGS. 7A and 7B. Find the distance and ratio.

  The shape change determination means 513 compares the shape of the eye when the character is displayed and when it is not displayed.

  When the shape change determination unit 513 determines that the viewer is narrowing the eyes while displaying the character, the display character reading unit 514 converts the displayed character into voice information, and the voice output 515. Output more.

The video synthesizing unit 506 synthesizes characters and video.
The video output unit 507 outputs the video synthesized by the video synthesis unit 506.

  According to the present embodiment, the readability of the displayed character is determined by the viewer's natural behavior, and the character size, character color, and character are automatically displayed so that the display is automatically readable without the viewer's instruction. Adjust the display method such as background color and text decoration. In addition, when the displayed characters are difficult to read, the information of the displayed characters is provided to the viewer by voice.

  FIG. 14 is a block diagram necessary for a display device according to the sixth embodiment of the present invention. In the display apparatus according to the third embodiment of the present invention, content input means 601, video / character information separation means 602, video decoding means 603, display character determination means 604, display character decoding means 605, and video composition. Means 606 and video output means 607 are provided. Further, the display character automatic adjustment unit 620 includes a viewer video input unit 608, a timing setting unit 609, a line-of-sight detection unit 610, a display character reading determination unit 611, an eye shape detection unit 612, and a shape change determination unit 613. A moving object detection unit 614, a display character reading unit 615, and an audio output unit 616.

The outline of the execution process of the present embodiment is as follows.
The content information input from the content input unit 601 is separated into character information and video information by the video / character information separation unit 602.
The video information is decoded into video by the video decoding means 603.
Regarding the character information, the display character determination unit 604 acquires the display time of the corresponding character, and sets the display time in the timing setting unit 609.
The line-of-sight detection unit 610 detects the line of sight of the viewer from the video acquired by the viewer video input unit 608. The processing of the viewer video by the line-of-sight detection unit 610 is designated by the timing setting unit 609.

The display character reading determination unit 611 compares the area where the viewer's line of sight is hit with the display character area, and determines that the character is being read when the viewer's line of sight is inside the display area.
The eye shape detection unit 612 converts the viewer's eye shape from the video acquired by the viewer video input unit 608 by using the edge detection unit as shown in FIGS. 7A and 7B. Find the distance and ratio.
The moving object detection unit 614 detects a moving object in the video using the video input from the viewer video input unit 608.
The shape change determination means 613 compares the shape of the eye when the character is displayed and when it is not displayed.

  When it is determined by the moving object detection means 614 that the viewer who is viewing has moved and replaced with another viewer, the shape of the eyes when no character is displayed is acquired again.

  When the shape change determination unit 613 determines that the viewer is narrowing the eyes while displaying characters, the display character reading unit 615 converts the displayed characters into audio information and outputs the audio output 616. Output more.

The image synthesizing unit 606 synthesizes characters and images.
The video output unit 607 outputs the video synthesized by the video synthesis unit 606.

  According to the present embodiment, the readability of the displayed character is determined by the viewer's natural behavior, and the character size, character color, and character are automatically displayed so that the display is automatically readable without the viewer's instruction. Adjust the display method such as background color and text decoration. In addition, when the displayed characters are difficult to read, the information of the displayed characters is provided to the viewer by voice.

  The display device of the present invention can be applied to, for example, a TV or a portable terminal for viewing digital broadcasting or streaming broadcasting, a digital signage, a personal computer, or the like.

DESCRIPTION OF SYMBOLS 10 ... Display screen, 11 ... Viewer, 12 ... Camera, 13 ... Viewer's eye before displaying a character, 14 ... Viewer's eye after displaying a character, 15 ... Control apparatus, 20 ... Content, 100 DESCRIPTION OF SYMBOLS ... Display apparatus, 101 ... Content input means, 102 ... Video / character information separation means, 103 ... Video decoding means, 104 ... Display character determination means, 105 ... Display character decoding means, 106 ... Video composition means, 107 ... Video output means 108 ... viewer video input means 109 ... timing setting means 110 ... eye shape detection means 111 ... shape change determination means 112 ... display change control means 120 ... display character automatic adjustment unit

Claims (20)

A control device and a display screen;
In a display device that performs signal processing of received content and displays video or the video and characters on the display screen at a predetermined time according to the content.
It has a camera and a text display automatic adjustment unit,
The character display automatic adjustment unit captures the viewer's eyes before and after displaying the characters on the display screen with the camera, and the viewer's eyes are displayed more than before the characters are displayed. A display device characterized in that when it becomes narrower later, it is determined that the character displayed for the viewer is difficult to read, and the character is automatically changed to a display that is easy to read. In claim 1,
The character display automatic adjustment unit is provided with an eye shape detecting means for acquiring a shape such as a vertical and horizontal length and a circularity of the eye by edge processing. In claim 1,
The display device is characterized in that when the shape of the viewer's eyes after changing the character display returns to the non-display state of the characters, the display change is stopped. In claim 1,
A display device that returns the display of the character to a state before the change when it is determined that the viewer is not reading a character from the state of the eye of the viewer photographed by the camera. 2. The display device according to claim 1, wherein the viewer to be measured is a viewer within a predetermined distance from the preset display screen. In claim 4,
When there are a plurality of viewers, the character display method is changed until the shape of all eyes in the viewers within the set distance range returns to the shape when the characters are not displayed. A display device characterized by being changed. In claim 1,
The characters to be displayed on the display screen are characters such as subtitles, subtitle super, OSD (menu or EPG), which are synthesized and output on the display device.
A display device characterized in that the change of the character displayed on the display screen to an easy-to-read display is a change of at least one display method of character size, character color, character background color, and character decoration. In claim 1,
Content input means, video / character information separating means, video decoding means, display character determining means, display character decoding means, video composition means, video output means, viewer video input means, timing setting means, Eye shape detection means, shape change determination means, and display change control means,
The eye shape detecting means detects a change in the shape of the viewer's eyes in the case of display / non-display of characters from the video of the viewer acquired from the viewer video input means, and the shape change determining means is , Determining whether or not the characters displayed for the viewer are easy to read due to the shape change of the eyes,
If the display change control means determines that it is difficult to read, the display character decoding means changes the display method of the character size, character background, color, character decoration, and the like. In claim 8,
Provided with display character reading means and voice output means,
The eye shape detecting means detects a change in the shape of the viewer's eyes in the case of display / non-display of characters from the video of the viewer acquired from the viewer video input means. When the shape change determining means determines whether or not the character displayed for the viewer is easy to read, and if it is determined that it is difficult to read, the display character reading means reads the display character and outputs it from the voice output means A display device. In claim 9,
When there are a plurality of viewers, the shape of the eyes of all viewers among the viewers within the range that can be photographed within the set distance range is the shape when the characters are not displayed. A display device that reads out the displayed characters until returning to the end of a sentence. Content input means, video / character information separating means, video decoding means, display character determining means, display character decoding means, video composition means, video output means, viewer video input means, timing setting means And a line-of-sight detection means, a display character reading determination means, an eye shape detection means, and a shape change determination means, and according to the content of the content input to the content input means, the video or the video and text Is displayed on the display screen,
The line-of-sight detection means detects which part of the display screen the viewer's line of sight is looking from the viewer's video input by the viewer video input means;
When the character is displayed on the display screen, it is determined that the viewer is trying to read the character when the viewer's line of sight is included in the range of the displayed character; A shape detection means detects a change in the shape of the viewer's eyes in each case of displaying or not displaying the character, and determines whether or not the characters displayed for the viewer are easy to read based on the change in the shape of the eye. When it is determined that reading is difficult, the display character decoding means changes the display method of the character size, character background, color, character decoration, and the like. In claim 11,
The display device according to claim 1, wherein the eye shape detecting means has a function of acquiring a shape such as a length and a roundness of the eye by edge processing. In claim 11,
If the viewer's line of sight falls outside the range of display characters while changing the display of the characters, the display device ends the change of the display method of the characters. In claim 11,
When there are a plurality of viewers, the display method of the characters is changed until all lines of sight within the viewer within a predetermined distance range are outside the range of the display characters. Characteristic display device. In claim 11,
A display device, wherein when there are a plurality of viewers, a character display method is changed until the shape of the eyes returns to the shape when characters are not displayed. In claim 11,
A moving object detection means,
When the viewer has left the front of the display device and may have become another viewer by the moving object detection means, the eye shape when the display character is not displayed is reacquired. Display device. Content input means, video / character information separating means, video decoding means, display character determining means, display character decoding means, video composition means, video output means, viewer video input means, timing setting means, An eye shape detection unit, a shape change determination unit, a display character reading unit, and an audio output unit are provided. Depending on the content input to the content input unit, the video or the video and the character are displayed on the display screen. In what to display
The eye shape detecting means detects a change in the eye shape of the viewer when the characters are displayed / hidden on the display screen from the viewer's video acquired from the viewer video input means. When the shape change determining means determines whether or not the character displayed for the viewer is easy to read due to the shape change of the eye, and determines that it is difficult to read, the display character reading means reads the display character A display device that outputs the sound from an audio output means. In claim 17,
The display device according to claim 1, wherein the eye shape detecting means has a function of acquiring a shape such as a length and a roundness of the eye by edge processing. In claim 17,
When there are a plurality of viewers, the shape of all the viewer's eyes in the viewer within the range that can be photographed within the set distance range is the shape when the characters are not displayed. A display device that reads out the characters displayed until the end or the end of the sentence. In claim 17,
A moving object detection means,
When the viewer has left the display device and may have become another viewer by the moving object detection means, the shape of the eyes when the display character is not displayed is re-acquired. Display device.

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