Source: https://patents.google.com/patent/JP5526196B2/en
Timestamp: 2020-04-01 01:52:14
Document Index: 267747562

Matched Legal Cases: ['art 30', 'art 31', 'art 32', 'art 40', 'art 41', 'art 42']

JP5526196B2 - Electronic device and video display method - Google Patents
Electronic device and video display method Download PDF
JP5526196B2
JP5526196B2 JP2012159687A JP2012159687A JP5526196B2 JP 5526196 B2 JP5526196 B2 JP 5526196B2 JP 2012159687 A JP2012159687 A JP 2012159687A JP 2012159687 A JP2012159687 A JP 2012159687A JP 5526196 B2 JP5526196 B2 JP 5526196B2
JP2012159687A
JP2012227956A (en
沼 功 一 瀬
2012-07-18 Priority to JP2012159687A priority Critical patent/JP5526196B2/en
2012-11-15 Publication of JP2012227956A publication Critical patent/JP2012227956A/en
2014-06-18 Publication of JP5526196B2 publication Critical patent/JP5526196B2/en
Embodiments described herein relate generally to an electronic device and a video display method.
In recent years, personal computers capable of displaying images three-dimensionally are becoming popular. In this type of personal computer, a plurality of parallax images viewed from different viewpoints are displayed on the display, and the user can stereoscopically view the video by viewing different parallax images between the right eye and the left eye.
When the video signal is reproduced, the video is generally displayed on a display window displayed on the display. In many cases, the user can arbitrarily change the size of the display window. In order to display three-dimensionally, it is necessary to display a plurality of parallax images on the display window. Therefore, when the size of the display window is reduced, the amount of information displayed is reduced, and it becomes difficult to discriminate the contour in the video. There is a problem that the quality of the image is lowered.
JP 2010-258609 A
Provided are an electronic device and a video display method capable of displaying high-quality video regardless of the size of a display window.
According to the embodiment, the electronic device includes a display unit, a control unit, and an image processing unit. Wherein, among the possible window size displayed on the display unit is changed window image corresponding to the video signal is displayed, based on the window size of the number of pixels and the display window, the video It is determined whether to perform two-dimensional display or three-dimensional display. The image processing unit outputs the video signal as 2D video data or 3D video data according to a determination result of the control unit. The display unit displays a 2D video corresponding to the 2D video data output from the image processing unit or a 3D video corresponding to the 3D video data on the display window.
The perspective view of the electronic device 100. FIG. 1 is a schematic block diagram showing a system configuration of an electronic device 100. FIG. 1 is a schematic block diagram illustrating a configuration of a video display system included in an electronic device 100 according to an embodiment. The flowchart which shows an example of the processing operation of a video display system. The figure which shows notionally the image | video displayed two-dimensionally on the display window. The figure which shows notionally the image | video displayed three-dimensionally on the display window.
FIG. 1 is a perspective view of the electronic device 100. FIG. 1 shows a personal computer that is an example of the electronic device 100. The electronic device 100 includes a main body 10 and a display unit 20.
The main body 10 has a thin box-shaped housing 11. On the upper surface of the housing 11, a keyboard 12, a touch pad 13, a power button 14, a speaker 15, and the like that accept user operations are arranged. Further, a CPU (Central Processing Unit), a main memory, an HDD, and the like, which will be described later, are arranged inside the housing 11.
The keyboard 12 is an input device that generates a signal indicating operation contents such as character input and icon selection. The touch pad 13 is a pointing device that generates a signal indicating operation contents such as screen transition, cursor movement, and icon selection. The power button 14 is a switch that controls on / off of the power supply of the electronic device 100. In addition, on the top surface of the housing 11, various indicators indicating whether the power is on or off, whether the battery is being charged, etc., and buttons for activating predetermined functions are arranged. It may be.
The display unit 20 includes a display unit 21 and an output direction control unit 22, and is rotatably attached to the main body 10 via a hinge (not shown). The display unit 21 can display a 2D video on a display window 23 described later, or can display a 3D video by displaying a plurality of parallax images viewed from different viewpoints. One feature of the present embodiment is that the control unit 30 to be described later automatically switches between displaying a 2D video or a 3D video.
When the 3D video is displayed, the output direction control unit 22 outputs the video displayed on the display unit 21 so that one parallax image is output to the user's right eye and the other parallax image is output to the user's left eye. Control the output direction. The output direction may be a predetermined direction, or may be controlled by tracking the user's right eye and left eye by providing the electronic device 100 with a camera (not shown). The output direction control unit 22 is, for example, a liquid crystal filter, and can control the output direction by changing the orientation of the liquid crystal material.
FIG. 2 is a schematic block diagram illustrating a system configuration of the electronic device 100. The electronic device 100 includes a CPU 101, a north bridge 102, a main memory 103, a south bridge 104, a GPU (Graphic Processing Unit) 105, an image processing unit 40, a display unit 20, and a VRAM (Video Memory) 106. A sound controller 107, a speaker 15, a BIOS-ROM (Basic Input Output System Read Only Memory) 108, an HDD 109, an optical disk drive 110, and an EC / KBC (Embedded Controller / Keyboard Controller) 111.
The CPU 101 is a processor that controls the operation of the electronic device 100, and executes an OS (Operating System) and various application programs loaded from the HDD 109 to the main memory 103. For example, the CPU 101 of this embodiment controls the image processing unit 40 by executing an application program corresponding to the control unit 30 built in the HDD 109.
Further, the CPU 101 executes a system BIOS loaded from the BIOS-ROM 108 to the main memory 103. The system BIOS is a program for hardware control.
The north bridge 102 is a bridge device that connects the CPU 101 and the south bridge 104. The north bridge 102 incorporates a memory controller that controls the main memory 103. Further, the north bridge 102 performs communication with the GPU 105 via the serial bus. The main memory 103 is a working memory for expanding the OS and various application programs stored in the HDD 109 and the system BIOS stored in the BIOS-ROM 108. The south bridge 104 controls the BIOS-ROM 108, the HDD 109, and the optical disk drive 110. Further, the south bridge 104 executes communication with the sound controller 107.
The GPU 105 outputs the video signal accumulated in the VRAM 106 by the OS to the display unit 20 via the image processing unit 40 described later. The sound controller 107 transmits the audio data to be reproduced to the speaker 15 and outputs it from the speaker 15. The EC / KBC 111 is a one-chip microcomputer in which an embedded controller that performs power management and a keyboard controller that controls the keyboard 12, the touch pad 13, and the like are integrated. Further, the EC / KBC 111 controls on / off of the electronic device 100 in accordance with the operation of the power button 14 by the user.
FIG. 3 is a schematic block diagram illustrating a configuration of a video display system included in the electronic apparatus 100 according to the present embodiment. The video display system includes a control unit 30, an image processing unit 40, and a display unit 21.
The control unit 30 includes a window size acquisition unit 31 and a display setting unit 32. The window size acquisition unit 31 acquires the window size of the display window 23 displayed on the display unit 21. The display setting unit 32 determines whether the video is to be displayed two-dimensionally or three-dimensionally according to the acquired window size, and supplies the result to the image processing unit 40. The control unit 30 is stored in the HDD 109 as an application program, for example, and is executed by the CPU 101.
The display unit 21 is a liquid crystal panel having a diagonal length of 15.6 inches, for example, and has a structure in which a pair of glass substrates are arranged to face each other and a liquid crystal material is arranged between these glass substrates. The display unit 21 includes a plurality (for example, 768) of scanning lines, a plurality of (for example, 1366 * 3) signal lines, and liquid crystal pixels formed at each intersection of the scanning lines and the signal lines. A backlight device (not shown) for irradiating the display unit 21 with light is provided on the back surface of the display unit 21.
When the video signal stored in the optical disc or the like inserted in the HDD 109 or the optical disc drive 110 is reproduced, the display unit 21 displays the video corresponding to the video signal on the display window 23. As shown in FIG. 1, the display window 23 is, for example, a substantially rectangular area for displaying an image. In the display window 23, a shortcut button for temporarily hiding (minimizing) the display window 23, displaying it on the entire display unit 21 (maximizing), or closing it, and playing or stopping a video signal, etc. An icon may be provided for controlling the above. The size of the display window 23 can be arbitrarily set by the user by, for example, dragging the edge of the display window 23 using the touch pad 13 or specifying the number of pixels in the vertical direction and the horizontal direction using the keyboard 12. Can be changed.
The image processing unit 40 in FIG. 3 supplies the video signal to the display unit 21 as 2D video data or 3D video data according to the determination result of the control unit 30. More specifically, the image processing unit 40 includes a 2D-3D switching unit 41, a timing controller 42, a gate driver 43, and a source driver 44. The image processing unit 40 is composed of, for example, a plurality of ICs (Integrated Circuits).
The 2D-3D switching unit 41 converts the video signal input from the GPU 105 into 2D video data or 3D video data according to the determination result of the control unit 30, and supplies it to the timing controller 42. The two-dimensional video data and the three-dimensional video data are video data for two-dimensional display and three-dimensional display of video corresponding to the input video signal, respectively, and both are analog signals in a format that can be displayed by the display unit 21. It is.
Here, the 3D video data includes a plurality of parallax images, at least two parallax images for right eye and left eye. In the parallax image for the left eye, the pixel in the foreground appears to be shifted to the right side from the pixel in the back. Therefore, the 2D-3D switching unit 41 shifts the pixel on the near side to the right based on the depth information, and appropriately interpolates the place where the original pixel was located using the surrounding pixels, so that the parallax image for the left eye Is generated. The same applies to the parallax image for the right eye. Depth information is information indicating how much each pixel is displayed in front of or behind the display unit 21, and may be added to the video signal in advance, or when not added, Depth information may be generated based on the characteristics of the video signal.
The timing controller 42 supplies 2D video data or 3D video data to the source driver 44 and controls operation timings of the gate driver 43 and the source driver 44. The gate driver 43 sequentially selects one of the scanning lines. The source driver 44 supplies video data to the signal line. The video data is supplied to the liquid crystal pixel connected to the scanning line selected by the gate driver 43, and the orientation of the liquid crystal material in the liquid crystal pixel changes according to the video data. Of the light emitted from the backlight device, light having an intensity corresponding to the orientation of the liquid crystal material is transmitted through the liquid crystal material, and an image corresponding to the image data is displayed on the display unit 21.
FIG. 4 is a flowchart illustrating an example of the processing operation of the video display system. When the CPU 101 reproduces the video signal, a display window 23 for displaying a video corresponding to the video signal is displayed on the display unit 21. Therefore, the window size acquisition unit 31 acquires the number of pixels in the horizontal direction and the number of pixels in the vertical direction of the display window 23 as the window size (step S1).
Next, the display setting unit 32 determines whether to display the image in two dimensions or in three dimensions according to the window size. More specifically, when the number of pixels in the vertical direction is less than the threshold THv (first threshold) (NO in step S2a), or the number of pixels in the horizontal direction is less than the threshold THh (second threshold). In this case (NO in step S2b), since the size of the display window 23 is small, the display setting unit 32 determines that two-dimensional display is performed (step S3).
On the other hand, when the number of pixels in the vertical direction is equal to or greater than the threshold value THv and the number of pixels in the horizontal direction is equal to or greater than the threshold value THh, the display setting unit 32 determines that the display is three-dimensional because the size of the display window 23 is large ( Step S4).
Here, the display setting unit 32 may use predetermined constant values as the thresholds THv and THh, but may set them according to the resolution of the video signal. For example, in the case of reproducing a standard-definition resolution video signal having 720 × 480 pixels stored on a DVD (Digital Versatile Disk), the threshold value THv is set to 360 pixels, the threshold value THh is set to 540, and the HD DVD (High Definition DVD) or BD is used. When playing a video signal of high-definition image quality having 1920 × 1080 pixels stored in (Blu-ray Disk), the threshold value THv is set to 576 pixels and the threshold value THh is set to 1024, which is set larger than the threshold value for standard image quality resolution. May be. This is because the visual quality of the video converted into the three-dimensional display decreases as the reduction ratio increases. That is, when the resolution of the video signal to be reproduced is a high-definition image quality resolution higher than the standard image quality resolution, it is set larger than the threshold values THv and THh in the case of the standard image quality resolution.
Further, the display setting unit 32 may set the thresholds THv and THh according to the length of the diagonal line of the display unit 21. More specifically, the threshold values THv and THh may be set larger as the display unit 21 is larger. The reason is that as the size ratio of the window size 23 is smaller with respect to the display unit 21, the visual quality of the video converted into the three-dimensional display is lowered.
Further, the display setting unit 32 may set the thresholds THv and THh to be larger as the distance between the user who views the video and the display unit 21 is longer. The reason is that as the distance from the display unit 21 increases, it becomes more difficult to accurately grasp the details of the video. This distance may be acquired automatically by mounting a camera (not shown) on the electronic device 100, for example, or may be set by the user.
In addition, the threshold values THv and THh may be set according to the resolution of the display unit 21 and the angle at which the user views the display unit 21, or the threshold values THv and THh may be set in combination.
When it is determined in steps S2a and S2b that two-dimensional display is performed (step S3), the 2D-3D switching unit 41 generates two-dimensional video data from the video signal and supplies the two-dimensional video data to the timing controller 42. The two-dimensional image is displayed on the display unit 21 (step S5).
FIG. 5 is a diagram conceptually showing an image displayed two-dimensionally on the display window 23. As shown in the figure, when the display window 23 is small, two-dimensional display is performed instead of three-dimensional display, so that it is not difficult to discriminate the outline and a high-quality image can be displayed.
On the other hand, when it is determined that the display is three-dimensional (step S4 in FIG. 3), the 2D-3D switching unit 41 generates three-dimensional video data from the video signal and supplies it to the timing controller 42 to supply the three-dimensional video data. A three-dimensional image corresponding to is displayed on the display unit 21 (step S6).
FIG. 6 is a diagram conceptually showing an image three-dimensionally displayed on the display window 23. As shown in the figure, when the display window 23 is large, the video is displayed in a three-dimensional manner, so that the three-dimensional video can be displayed without deterioration in image quality.
Thereafter, as long as the video signal continues to be reproduced (YES in step S7), the processing after step S1 is performed every time the window size of the display window 23 is changed (YES in step S8).
As described above, in this embodiment, when the window size of the display window 23 is small, the video is displayed two-dimensionally, and when the window size is large, three-dimensionally displayed. Therefore, high-quality video can be displayed regardless of the window size.
In steps S2a and S2b in FIG. 4, the display setting unit 32 determines whether to perform two-dimensional display or three-dimensional display based on the number of pixels in the vertical and horizontal directions of the display window 23. Only one of them may be acquired to make a simpler determination. Further, the determination may be made based on the number of pixels on the diagonal line of the display window 23 or the number of pixels in the display window 23, or the length may be used instead of the number of pixels.
At least a part of the video display system described in the above-described embodiment may be configured by hardware or software. When configured by software, a program for realizing at least a part of the functions of the video display system may be stored in a recording medium such as a flexible disk or a CD-ROM, and read and executed by a computer. The recording medium is not limited to a removable medium such as a magnetic disk or an optical disk, but may be a fixed recording medium such as a hard disk device or a memory.
Further, a program for realizing at least a part of the functions of the video display system may be distributed via a communication line (including wireless communication) such as the Internet. Further, the program may be distributed in a state where the program is encrypted, modulated or compressed, and stored in a recording medium via a wired line such as the Internet or a wireless line.
DESCRIPTION OF SYMBOLS 21 Display part 30 Control part 31 Window size acquisition part 32 Display setting part 40 Image processing part 41 2D-3D switching part 42 Timing controller 43 Gate driver 44 Source driver 100 Electronic device
A display unit having a predetermined number of pixels;
Among the possible changes the window size displayed on the display section window image corresponding to the video signal is displayed, based on the window size of the pixel count and the display window, to display the image 2-dimensional A control unit for determining whether to perform three-dimensional display;
An image processing unit that outputs the video signal as 2D video data or 3D video data in accordance with a determination result of the control unit ,
The electronic device , wherein the display unit displays a 2D video corresponding to the 2D video data output from the image processing unit or a 3D video corresponding to the 3D video data on the display window.
2. The electronic device according to claim 1, wherein the control unit determines whether the video is to be displayed two-dimensionally or three-dimensionally based on the changed window size every time the window size is changed.
The electronic device according to claim 1, wherein the display unit outputs the 3D video data including a plurality of parallax images viewed from different viewpoints.
Of predetermined window can be changed is the window size displayed on the display unit having a number of pixels, the image corresponding to the video signal is displayed, based on the window size of the number of pixels and the display window, the video Determining whether to display two-dimensionally or three-dimensionally;
Outputting the video signal as 2D video data or 3D video data according to the result of the determination;
Displaying a 2D video corresponding to the output 2D video data or a 3D video corresponding to the 3D video data on the display window.
5. The video display method according to claim 4, wherein each time the window size is changed, it is determined whether the video is to be displayed two-dimensionally or three-dimensionally based on the changed window size.
The video display method according to claim 4 or 5, wherein in the step of outputting the 3D video data, the 3D video data including a plurality of parallax images viewed from different viewpoints is output.
JP2012159687A 2012-07-18 2012-07-18 Electronic device and video display method Active JP5526196B2 (en)
JP2012159687A JP5526196B2 (en) 2012-07-18 2012-07-18 Electronic device and video display method
JP2011092859 Division 2011-04-19
JP2012227956A JP2012227956A (en) 2012-11-15
JP5526196B2 true JP5526196B2 (en) 2014-06-18
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JP2012159687A Active JP5526196B2 (en) 2012-07-18 2012-07-18 Electronic device and video display method
JP (1) JP5526196B2 (en)
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2012-07-18 JP JP2012159687A patent/JP5526196B2/en active Active
JP2012227956A (en) 2012-11-15
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