KR20120054569A - Device and method for viewing either 2 dimensional image or 3 dimensional image by personal selection - Google Patents

Abstract

PURPOSE: An individual selection viewing device and method are provided to selectively watch a 2d image and a 3d image according to individual preference or individual health condition. CONSTITUTION: A left eye lens and a right eye lens are respectively pass through one of polarized light of a left eye image and polarized light of a right eye image. Half-wave plates(1011, 1021) execute phase lag of incident light as 180degrees. The half-wave plates are attached or detached to a frame. The half-wave plates rotate over 90degrees by being connected to a hinge attached to the frame. A liquid crystal is attached to at least one of the left eye lens and the right eye lens. A mode controller supplies a power source to the liquid crystal according to a control signal.

Description

DEVICE AND METHOD FOR VIEWING EITHER 2 DIMENSIONAL IMAGE OR 3 DIMENSIONAL IMAGE BY PERSONAL SELECTION}

According to the present invention, when two or more people simultaneously view the same display screen, a person who wants to watch a two-dimensional (2D, 2-Dimnesion) image watches a 2D image and a three-dimensional (3D, 3-Dimension) image. One would like to relate to an apparatus and method for viewing 3D images.

With the start of the 3D video revolution, broadcasting, film, and games are all turning to 3D, and the market is expanding faster than expected. As the world's largest companies are rapidly distributing 3D video solutions using 3D glasses to PCs, TVs, and mobile terminals, the era of single-stereoscopic glasses is also expected in the future.

The principle of 3D imaging is based on the human perception of the distance of an object through two eyes. The human eye sees two images with a distance of about 65mm, and the brain synthesizes these images to recognize distance and three-dimensionality.

The 3D image display is a display that delivers different images to a user's left eye (left eye) and right eye (right eye) by using binocular parallax so that the user may feel a 3D image intended by the 3D image content.

The 3D display is divided into glasses type and glassesless type according to a method of separating left and right images.

There are red glasses, polarized glasses, and shutter glasses. The glasses are parallax barrier, lenticular lens, IP (Integral Photography), volumetric display, hologram. There is also a way to implement a stereoscopic image. The 3D glasses deliver two images left and right from the display to each eye.

In the red-eye glasses method, color loss occurs when separating left and right images using color difference. The polarizing glasses method separates the left and right images according to the polarization direction and displays the left and right images by attaching the polarizing film to the front of the display and the left and right images are separated and displayed to the eye through the polarizing glasses worn by the user. The shutter glasses display the left and right images alternately at high speed, and the left glasses are opened in the left image section and the right glasses are opened in the right image section to separate the left and right images. Among eyeglasses, polarized glasses and shuttered glasses are used because they are simple, inexpensive, and have high resolution.

The glasses-free method has a parallax barrier method and a lenticular lens method, and the left and right images are shown to both eyes at a predetermined position. The parallax barrier method alternately arranges the left image pixel line and the right image pixel line in the vertical direction and places a barrier so that the left and right images are separated and visible to the corresponding left and right eyes. In the lenticular lens method, the left and right images are alternately arranged vertically, and then a film having a semi-cylindrical lenticular lens is attached, and the left and right images are separated according to the lens angle so that the left and right eyes are visible. The parallax barrier method and the lenticular lens method can implement 3D only at a certain angle and distance within the expected viewing range of the display. If the screen is out of range, the screen is shifted or blurred. In order to solve this problem, it is possible to implement stereoscopic image in real space such as multi-view, IP (Integral Photography), Volumetric Display, and hologram, but it is difficult to popularize because the display is expensive and the content production cost is too expensive.

Thus, despite the advantage that the glasses-free 3D display does not need glasses, the price is expensive, the screen resolution is also low, the picture quality drops sharply if you do not watch from the exact front, there are many barriers to popularization other than a small display such as a mobile phone screen. Even when glasses-free 3D displays are commercialized, eyeglass 3D displays are expected to become mainstream for a considerable period of time because they are less competitive than eyeglasses in terms of display price, image quality, and content production cost.

Although there are individual differences, it is known that when watching 3D images, the eyes easily become tired or cause dizziness, headache, wag and vomiting. Currently popularized 3D imaging technology does not make the actual image in 3D like a hologram, but shows different images to both eyes to give a three-dimensional effect, so you can feel the lingering according to it and need to adjust the eyes continuously for a long time. This can cause headaches and eye strain.

Watching 3D video inevitably causes dizziness depending on the individual, and feelings of dizziness depending on the position of both eyes or the difference in left and right eyesight are very individual. Thus, eye fatigue and dizziness cannot be avoided, so a solution is required.

One of the solutions to the fatigue of watching 3D video is a technology that allows the user to adjust the stereoscopic intensity of the display to his or her preference. In addition, 2D and 3D display technology is a technology that can switch to the 2D mode when the user feels tired while watching in the 3D display mode.

However, according to all conventional methods, when two or more viewers watch one display, all viewers see the same image and cannot provide different images for each individual.

Conventional 2D and 3D display technology requires that all viewers watch 3D video in 3D mode and all viewers watch 2D video in 2D mode, so that some viewers can watch in 3D mode while others can watch in 2D mode. There is no. Currently, there is no personalized 2D and 3D combined display technology that considers individual deviation, so when multiple viewers watch 3D images, viewers who feel eye fatigue or dizziness when watching 3D images take off their 3D glasses for a while and close their eyes or eyes. Is resting outside the screen and watching again.

This is a problem that the viewer can not watch the important part of the video. Or, in consultation with other viewers, the display is switched to the 2D mode so that all viewers are forced to watch in the 2D mode.

The present invention was devised to solve the problems of the prior art, and when two or more viewers simultaneously watch a display, a person who wants to watch a two-dimensional (2D) image may watch a 2D image and three-dimensional ( 3D) The person who wants to watch the video is intended to watch the 3D video.

In order to achieve the above object, the present invention provides a pair of glasses for a shutter-type 3D display device that alternately displays a left eye image and a right eye image, the wired and wireless interface for receiving a shutter control information signal from the 3D display device, and the shutter control information A shutter control unit for receiving a signal and a mode switching signal and performing 2D / 3D switching accordingly, wherein the shutter control unit displays a display time of the left eye image and a left eye lens, a right eye image and a right eye lens, and a shutter opening in a 3D mode; The present invention provides a 3D display apparatus for synchronizing time, and synchronizing the display time of one of the left eye image and the right eye image with the shutter opening time of the left eye lens and the right eye lens in the 2D mode.

In addition, the present invention provides a means capable of 2D / 3D conversion for 3D display devices such as polarized light, color filter type, etc. in addition to the shutter type 3D display device, in the present invention from the description of the following invention and the claims The proposed solution will be clear.

According to the present invention, when two or more viewers watch a 3D image on one spectacle 3D display, a person who wants to watch a 2D image wants to watch a 2D image and a 3D image. A person can watch 3D video.

In addition, the user can easily switch between 2D and 3D images for each user by using a general display capable of viewing 3D images without changing or adding parts to the spectacle 3D display device.

That is, according to the present invention, even when the 3D image is displayed on the 3D display, each viewer can select and watch 2D or 3D according to the personal preference or the instantaneous state of health.

1 is a system configuration of a notebook PC embodiment to which the present invention is applied
2 is a detailed configuration diagram of an embodiment applied to the notebook PC
3 is a wired and wireless communication interface block diagram between the terminal and the 3D glasses
4 is a diagram illustrating a 3D image viewing process using the shutter-type 3D glasses.
5 is a diagram illustrating a process of individually selecting viewing of 2D and 3D images;
6 is a diagram illustrating an embodiment of viewing one eye of a 2D image.
7 is a configuration diagram of the 3D glasses system additionally applying a human body signal detection unit
8 is a user interface diagram of a method for automatically switching between 3D viewing and 2D viewing
9 is a diagram illustrating a process of an automatic switching method between viewing 3D video and viewing 2D video;
10 illustrates an embodiment using polarized 3D glasses.
11 is a polarized 3D glasses with an electrically controlled polarizer
12 is an operation of the circular polarizing lens including an electrically controlled polarizer
13 is an embodiment using the color filter-type 3D glasses

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar elements or signals in the drawings.

Meanwhile, the target system of the present invention is any device or image system capable of 3D image display. That is, the present invention can be applied to a desktop PC, a notebook PC, a tablet PC, a television (TV), a smartphone, a display of a mobile phone, and the like, a cinema projector screen, a performance hall, and a stadium display.

However, for the convenience of description and enhancement of understanding, the following description will focus on an embodiment of a computer monitor, which is the most common display device. Those skilled in the art will readily be able to adapt and adapt to other display devices.

1 is a basic configuration of an embodiment of the present invention applied to a notebook PC. As shown, it is composed of a computer 104 with a monitor 102, an active shutter 256 which is an example of 3D glasses.

The computer 104 may store and include personally selected viewing software of a 2D image and a 3D image in a computer readable memory. The computer 104 displays the 2D image or the 3D image on the monitor 102 at the request of the user, and transmits a corresponding shutter signal to the shutter 256 of the glasses worn by each user to operate the shutter 256. Each user can filter the video for viewing.

The shutter 256 may be a photoelectric shutter such as a mechanical shutter or a liquid crystal shutter. The shutter 256 of this embodiment is a kind of 3D glasses and is typically applied to the shutter glasses having a shutter lens and will be described mainly in the form of glasses, but the shutter 256 may be any type having a shutter in front of the user's eyes. Of course, it can be applied to the object. For example, it can be manufactured in various forms such as a shutter structure with a support, a shutter cap.

2 is a detailed block diagram of an embodiment applied to the notebook PC. The terminal 200 may be any computing device capable of displaying 3D images such as a notebook PC, a desktop PC, a notebook PC, a tablet PC, a television (TV), a smartphone, a mobile phone, a cinema projector screen, a theater, and a stadium display. have.

The 2D / 3D mode manager 210 provides a user interface and selects and manages whether to watch in 2D or 3D for each user who views the terminal. Of course, the 2D / 3D mode manager 210 may be omitted, and only 3D glasses 250 may select whether to watch in 2D or 3D.

The 3D display SW 220 includes a 3D engine and graphics driver 222 and a 3D application 224.

The 3D engine and graphics driver 222 receives an image from the 3D application 224, provides a 3D image to the display 230, and communicates with the 3D glasses 250 through the wired / wireless interface 240 to correspond to the 3D image. Transmit glasses control signal.

The 3D engine and the graphic driver 222 provide the left image and the right image to the memory of the video / graphic controller according to the image frame sequence, and the video / graphic controller displays the left image and the right image on the display 230.

The wired / wireless interface 240 of the terminal transmits a shutter control signal to the wired / wireless interface 252 of the 3D glasses 250. The interface is a wired link such as USB or serial link, IR, RF (FM, Bluetooth, Zigbee) may be implemented as a radio link.

The active shutter type 3D glasses 250 includes a wired / wireless interface 252, a shutter controller 254, a shutter 256, and a 2D / 3D mode selector 258.

The wired / wireless interface 252 receives the shutter control signal transmitted from the terminal-side wired / wireless interface 240 and provides the shutter control signal to the shutter controller 254, and the shutter controller 254 receives the shutter 256 according to the received and decoded shutter control signal. Control the opening and closing of the unit.

The 2D / 3D mode selection unit 258 provides a user interface and selects and manages whether to watch in 2D or 3D for each user who views the terminal. The user selects one of 2D video viewing and 3D video viewing by simply adjusting his or her 3D glasses with a button or the like while viewing the terminal. The individual selection viewing system of the 2D image and the 3D image of the present invention requires only one or more of the 2D / 3D mode manager 210 of the terminal and the 2D / 3D mode selection unit 258 of the 3D glasses.

3 is a block diagram illustrating a wired and wireless communication interface between the terminal 200 and the 3D glasses 250 illustrated in FIG. 2. The communication interface may be implemented as a wired link such as USB, IEEE 1394, or a serial link, or a wireless link such as IR or RF (FM, Bluetooth, Zigbee).

As an example, in the USB wired link as shown in FIG. 3A, the USB transmitter 310 receives a shutter open / close control signal from the USB port 300 of the terminal. The USB transmitter 310 receives + 5V power from the USB port 300 of the terminal and boosts the voltage to + 12V, + 15V, etc. in the power module 316 to obtain a voltage required for shutter control. The shutter controller 314 receives a control signal from the terminal through the USB interface CPU 312 to control the shutter 322 of the 3D glasses 320. The USB interface CPU 312 may also serve as the CPU of the shutter controller 314.

The 2D / 3D mode selection unit 318 provides a user interface and selects and manages whether to watch in 2D or 3D for each user who views the terminal. The 2D or 3D image mode selection signal selected by the user through the 2D / 3D mode selection unit is provided to the shutter controller. The mode selection signal may be provided directly to the shutter or may be provided to the USB interface CPU.

Alternatively, the 2D / 3D mode selection unit may be provided in the 3D glasses 250 as shown in FIG. The user selects 2D video viewing and 3D video viewing by simply adjusting his 3D glasses with a button or the like while viewing the terminal.

In another embodiment, in the wireless link as shown in FIG. 3B, the transmitter 340 including the transmitter 344 is connected to the USB port 330 of the terminal through the USB interface CPU 342, and the 3D glasses 250 are wired or wireless. An interface 252, a shutter controller 254, a power module 259, a shutter 256, and a 2D / 3D mode selector 258 are included.

The wired / wireless interface 252 includes a receiver and a decoder, receives a wireless signal from the transmitter 344 of the transmitter 340, decodes a shutter open / close control signal, and provides it to a shutter controller. The 2D or 3D image mode selection signal selected by the user through the 2D / 3D mode selection unit 258 is provided to the shutter controller. The mode selection signal may be provided directly to the shutter or may be provided to the receiver and the decoder. In addition, the transmitting unit 310, 340 may be built in the terminal.

4 shows a 3D image viewing process using active shutter type 3D glasses. In the active shutter method, the left eye shutter is synchronized to open and close the left eye (left eye) at the moment when the display displays an image (left eye image) to be delivered to the left eye, and the display sends an image (right eye image) to the right eye. At the moment of display, the left and right images are separated in time by synchronously opening and closing the right eye shutter so that only the right eye (right eye) comes in.

Usually, the left eye image and the right eye image are alternately played on one display. If you look at this image with your bare eyes, you will see two images superimposed, but if you wear shutter-type 3D glasses, the two images will be selectively entered into the left and right eyes to recognize the 3D image.

In FIG. 4, the display monitor alternately displays the left eye image L and the right eye image R by one frame by vertical synchronization (Vsync) according to time (S400). The shutter-type 3D glasses worn by users A and B who want to watch the display filter the incident light by opening the left eye shutter and closing the right eye shutter when the left eye image is displayed to deliver the left eye image to the left eye of the user. The right eye blocks the video. When the right eye image is displayed, the left eye shutter is closed and the right eye shutter is opened to block the image of the left eye of the user and to transmit the right eye image of the user's right eye (S410 and S420).

In the description of this figure, it is assumed that the display is ideal for convenience of description. That is, it is assumed that the right eye image of the previous frame does not remain as an afterimage on the display at the moment of the current frame in which the left eye image is displayed. In reality, since the display alternately displays the left eye image and the right eye image every frame at a high speed, afterimages tend to remain, and afterimages vary depending on the display. Especially if the display is LCD, there are many afterimages. If the afterimage increases, the left and right images will be mixed, resulting in a crosstalk that appears as a double image, resulting in poor 3D image quality.

In order to fundamentally reduce such crosstalk, technology development for increasing the response speed of display materials is being conducted worldwide. In addition to improving response characteristics of existing LCD liquid crystals, new high-speed LCD liquid crystals such as OCB (Optically Compensated Bend) liquid crystals and Blue Phase Mode liquid crystals are being actively developed. New displays are also being developed, such as organic light emitting diodes (OLEDs). In addition, techniques that reduce crosstalk, although not the original method, include techniques such as a shutter opening time reduction method, a shutter opening time delay method, and a blank frame insertion method.

In the shutter basic operation such as S420, the opening and closing times of the left and right shutters are the same (T_LO = T_LC = T_RO = T_RC), whereas the shutter opening time reduction method reduces the opening and closing times of the left and right shutters from the closing time (T_LO <T_LC). , T_RO <T_RC). The shutter opening time delay method is a method of opening and closing the shutter after a predetermined time delay rather than opening and closing the shutter at the time of vertical synchronization (Vsync). Blank frame insertion is a method of displaying a blank image between a left eye image and a right eye image. In the description of the present invention, a shutter basic operation method such as S420 is assumed and described for simplicity of explanation.

Those skilled in the art will appreciate that the present invention can be easily modified and applied even in a method in which the opening and closing of the shutter are slightly different compared to the shutter basic operation method (S420) such as a shutter opening time reduction method, a shutter opening time delay method, and a blank frame insertion method. Descriptions based on these methods are omitted.

5 is a view illustrating a process of individually selecting viewing among 2D and 3D images of the present invention.

In FIG. 5A, the display monitor alternately displays the left eye image L and the right eye image R over time (S400). The operation of the display monitor is the same as the shutter operation method S400 shown in FIG. 4.

Initially (up to time point a2), users A and B both view the 3D image represented by one display. When the user watches a 3D image, the shutter-type 3D glasses worn by users A and B filter the incident light by opening the left eye shutter and closing the right eye shutter when the left eye image is displayed, thereby filtering the left eye image of the left eye of the user. Transmits and blocks the video in the right eye of the user. When the right eye image is displayed, the left eye shutter is closed and the right eye shutter is opened to block the image of the left eye of the user and to transmit the right eye image of the user's right eye (S410).

At the third time point (view point a3) of FIG. 5A, user A continues to watch the 3D image, while user B feels eye strain and switches to viewing the 2D image manually or automatically. One embodiment of the 2D image viewing conversion of the present invention is a method of simultaneously opening or closing the left and right shutters of the shutter-type 3D glasses. At the third time point (view point a3) of switching from 3D to 2D, the left and right shutters are simultaneously opened to deliver the left eye image of the display to both the left and right eyes of user B. At the fourth time point (view point a4), the left and right shutters are closed at the same time so that the right eye image is not transmitted to the left and right eyes of user B. In this manner, only the left eye image of the display is transmitted to the left and right eyes of the user B, and the right eye image is blocked (S520). In this case, user B views only the left eye image of the display in 2D. If the user switches from 3D to 2D at the fourth time point (view point a4), user B views only the right eye image of the display in 2D.

Therefore, according to the present invention, when multiple users watch a display, some users continue to watch in 3D and other users can easily switch to 2D while watching 3D to watch only the left eye image or the right eye image in 2D. Since the user B can watch in 2D and then switch to 3D for viewing, the user B can store whether the 2D video being viewed is a left eye image or a right eye image for easy 2D-> 3D conversion.

In the description of this figure, it is assumed that the display is ideal for convenience of description. That is, it is assumed that the right eye image of the previous frame does not remain as an afterimage on the display at the moment of the current frame in which the left eye image is displayed. In addition, for simplicity of explanation, assume a basic shutter operation such as S530. Those skilled in the art can easily modify the present invention even in a method in which the opening / closing time and shape of the shutter are different compared to the basic shutter operation method S530 such as a shutter opening time reduction method, a shutter opening time delay method, a blank frame insertion method, and the like. The description based on these methods is omitted because it can be applied.

Referring to FIG. 5B, a case in which users A and B simultaneously view one display while user A views 3D video and user B views 2D video will be described.

At the third time point (view point b3) of FIG. 5B, user A continues to watch the 3D image, while user B switches from viewing the 2D image to viewing the 3D image. At the time point b2, the left and right shutters are simultaneously opened and closed to deliver the left eye image of the display to both the left and right eyes of the user B for 2D viewing, and the left eye image is displayed from the third time point (point b3) when switching from 2D to 3D. At the moment, the left eye shutter is opened and the right eye shutter is closed, and when the right eye image is displayed, the left eye shutter is closed and the right eye shutter is opened to allow the user B to watch the 3D image again (S570).

In order to easily convert from 2D to 3D transition time, information on whether a 2D image being viewed in 2D is a left eye image or a right eye image is used, or information on whether a currently displayed frame image is a left eye image or a right eye image is used.

6 is a diagram illustrating an example of viewing one eye of a 2D image according to another embodiment of the present invention.

In the situation of FIG. 6A, firstly, both of users A and B watch a 3D image displayed by one display.

At the third time point (view point a3) of FIG. 6A, user A continues to watch the 3D image, while user B feels eye strain and switches to viewing the 2D image manually or automatically.

Another embodiment of the 2D image viewing switching of the present invention is a one-eye viewing method of operating one eye shutter of the shutter-type 3D glasses repeatedly while opening and closing, and continuously closing the other eye shutter. At the third time point (view point a3) of switching from 3D to 2D, the left eye shutter is opened to transmit the left eye image of the display to the left eye of the user B. At the fourth time point (view point a4), both the left and right shutters are closed so that the right eye image is not transmitted to the left and right eyes of user B. In this manner, only the left eye image of the display is transmitted to the left eye of the user B, and the image is always blocked in the right eye (S620).

In this case, user B views only the left eye image of the display in 2D. If the user switches from 3D to 2D at the fourth time point (view point a4), user B views only the right eye image of the display in 2D.

Since the user B can watch in 2D and then switch to 3D for viewing, the user B can store whether the 2D video being viewed is a left eye image or a right eye image in order to easily switch from 2D to 3D. In the description of this figure, for convenience of explanation, it is assumed that the display is ideal and the shutter basic operation method such as (S630). Those skilled in the art will be omitted since the present invention can be easily modified and applied to the method of the shutter opening time reduction method, the shutter opening time delay method, the blank frame insertion method and the like.

In the situation of FIG. 6B, while the users A and B simultaneously watch one display, the user A views the 3D image and the user B watches the 2D image only with the left eye. At the fourth time point in FIG. 6B (view point b4), user A continues to watch the 3D image, while user B switches from viewing the left eye 2D image to viewing the right eye 2D image to alleviate eye fatigue. Thereafter, only the right eye image of the display is transmitted to the right eye of the user B, and the image is always blocked on the left eye (S670). In this way, switching to 3D video viewing while viewing 2D video with one eye is switched in the manner as shown in FIG. 5B.

Another embodiment of monocular viewing of 2D images delivers only the right eye image of the display to the left eye of User B and always blocks the image to the right eye. That is, it is not necessary to provide only the left eye image of the display when the 2D single eye is watched, but the right eye image may be provided.

The switching between the 3D viewing and the 2D viewing of the present invention may be configured to be switched directly by the user or automatically according to preset conditions. The user can easily switch to a touch or a button in the terminal or 3D glasses. When the user switches from the terminal, the terminal transfers the switching signal to the 3D glasses to switch. Automatic switching is a method in which a user sets a switching condition in advance in the terminal or 3D glasses, and then automatically switches when the condition is met. In addition, the human body signal detection unit is added to the 3D glasses to detect the human body signal of the user to determine the degree of eye fatigue and dizziness and automatically switch to the correct conditions.

7 is a 3D glasses system in which the human body signal detection unit is additionally applied to the 3D glasses. The human body signal detecting unit 710 is composed of a user's head motion sensor such as an acceleration sensor, a camera and an eye blink sensor such as an optical sensor, and is mounted in 3D glasses to measure head movement and eye blink. If a person's eyes become tired or dizzy, they may unconsciously shake their heads or blink their eyes often. In the present invention, when the human body signal detection unit 710 detects a head movement and blinking, etc. and transmits the detected human body signal to the eye fatigue determination unit 720, the eye fatigue determination unit 720 is the eye fatigue when viewing the 3D image. And determining the degree of dizziness so as to warn the user or automatically switch to the 2D image mode when it is determined that the user's eyes are tired. The eye fatigue determination unit 720 may be embedded in the 3D glasses or may be embedded in the terminal.

8 is a diagram illustrating a user interface 810 of the automatic switching method between 3D viewing and 2D viewing according to the present invention.

It can be seen that the user interface 810 of FIG. 8 has a menu configured to select four switching methods.

The first menu 812 is a menu for the first automatic switching method for setting the automatic switching parameter according to the selected dizziness and eye fatigue level. When the first menu is selected, the level-specific selection menu 820 shown on the right side is displayed to set dizziness and fatigue level, which are switching conditions.

Dizziness and eye fatigue levels in 3D viewing are, for example, the first level: no dizziness and eye fatigue in watching 3D images. Second level: There is little dizziness and eye fatigue. Third level: There is quite a dizziness and eye fatigue. Fourth level: dizziness and eye fatigue are severe. Level 5: Dizziness and eye fatigue are very severe.

When the user selects the level of dizziness and eye fatigue based on the degree of dizziness and eye fatigue that the user feels in 3D viewing based on previous experience or the like, an automatic conversion factor is set according to the selected dizziness and eye fatigue level.

For example, when the user selects the first level by determining that there is no dizziness and eye fatigue at the time of viewing the 3D image, the 3D viewing is always set automatically for the 3D content.

If the user selects the third level because the user experiences that the user experiences dizziness and eye fatigue when watching the 3D image, the 3D content may be viewed, for example, 3D video 30 minutes-> 2D video 10 minutes-> 3D video In 30 minutes, the automatic transition is set to include 2D video viewing time for relaxing eyes.

The second menu 814 is a menu for the second automatic switching method, and the second automatic switching method is a method in which a user directly selects an automatic switching factor. As an example, a user may watch a 3D video through a second menu 814 (15 minutes)-> watch a 2D video (10 minutes)-> watch a 3D video (15 minutes)-> watch a 2D video (10 minutes) (repeat) The user may directly input a time for watching the 3D image and a time for watching the 2D image, and may be configured to automatically switch as the user inputs.

9 shows a process of an automatic switching method between viewing 3D video and viewing 2D video of the present invention.

The user may determine whether to directly select the automatic switching factor (S900).

When the user decides to select the auto conversion factor directly, the user directly selects and enters the auto conversion factor (S910). As an example, in the user interface, the user views 3D video (20 minutes)-> 2D video (10 minutes)-> 3D video (15 minutes)-> 2D video (10 minutes) (Repeat) The time and the time to watch the 2D video is directly input, and the automatic switching is operated as the user inputs (S950).

If the user decides not to directly select the automatic conversion factor in the selection step (S900), the user selects a level at which dizziness and eye fatigue are felt when viewing 3D (S920). The level is for example first level: no dizziness and eye fatigue when viewing 3D images. Second level: One such as having dizziness and little eye fatigue.

If the 3D effect information is provided from the 3D content, a method of setting a correction factor may be taken accordingly (S930).

In some cases, the 3D image content may include hourly 3D effect information as additional information. For example, the 3D effect degree is strong in 30 to 50 minutes of playing time (a possibility of dizziness may occur), and the content playing time is 0 minutes to Information such as 3D effect is normal until 8 minutes, and 3D effect is large at 8 to 10 minutes may be included in the content.

If so, this information can be used to set the correction factor.

Basically, the automatic conversion factor is set according to the selected dizziness and eye fatigue level (S940). If the content provides 3D effect information, the automatic conversion factor is set in consideration of the correction factor, but step S930 is optional and is not essential.

Therefore, if the content does not provide 3D effect information, 3D video viewing (20 minutes)-> 2D video viewing (10 minutes)-> 3D video viewing (20 minutes)-> 2D video viewing depending on the selected dizziness and eye fatigue level (10 minutes) Set the auto conversion factor as (Repeat).

As the user feels dizzy more, the software sets the automatic conversion factor to reduce the 3D video viewing time.

On the other hand, if the content provides 3D effect information, it can be automatically viewed as 3D video viewing (20 minutes)-> 2D video viewing (10 minutes)-> 3D video viewing (20 minutes)-> 2D video viewing (10 minutes) (Repeat). When the transition is set to work, 3D image viewing (18 minutes)-> 2D image viewing (10 minutes)-> 3D image viewing (22 minutes)-> 2D image by calculating the correction factor using the 3D effect information of the content Automatic conversion factors such as viewing (10 minutes) can be corrected.

These correction factors are used to adjust the user's feeling of dizziness and a lot of 3D effects. In step 950, 3D / 2D automatic switching is operated according to the set automatic switching factor.

Although the embodiment using the shutter-type 3D glasses has been described so far, the technical idea of the present invention is of course applied to the polarized 3D glasses. A differential situation when using polarized 3D glasses is shown in FIG. 10.

Although a description will be mainly given by using a notebook PC as an example, the present invention may be applied to a desktop PC, a notebook PC, a tablet PC, a television (TV), a smartphone, a mobile phone, a cinema projector screen, a performance hall, and a stadium display. The movie theater projector screen is slightly different from the notebook PC and the display method, but is the same in terms of image filtering of the 3D glasses, so those skilled in the art can easily apply it to the notebook PC embodiment.

The computer 1004 displays the 2D image or the 3D image on the monitor 1002 equipped with the polarization filter, wherein the polarization filter of the monitor 1002 is operated so that the left eye image is displayed with a specific polarization direction and the right eye image is displayed with the left eye image. It is operated to display with orthogonal polarization direction. The polarizing glasses 1006 and 1007 pass only light of a specific polarization.

Even without the wired or wireless communication means 1008 between the computer and the polarizing glasses, it is possible to watch 2D video or 3D video. However, when the computer controls the polarization state of the polarizing glasses, wired or wireless communication means 1008 may be required.

3D polarizing glasses and 2D polarizing glasses are shown in FIG. 10A. In the 3D polarizing glasses 1006, the left and right lenses of the glasses are in a mutually orthogonal polarization state as linear polarization filters or circular polarization filters. That is, when the display displays the left eye image with left-circular polarization and the right eye image with right-circular polarization, the left eye lens of the 3D polarizing glasses 1006 is left circularly polarized, and the right eye lens is It is provided in a right circularly polarized state and vice versa.

In the 2D polarizing glasses 1007, the left and right lenses of the glasses are in the same polarization state with each other as a linear polarization filter or a circular polarization filter. When a user wears 3D polarized glasses to watch 3D images and feels eye strain, the user manually switches to 2D polarized glasses to watch 2D images. Another embodiment replaces one lens of the 3D polarizing glasses 1006 with a lens having the same polarization state as the other lens to convert to 2D image viewing by making the 2D polarizing glasses.

10B shows an embodiment of polarized 3D glasses 1010 with a detachable half-wave plate 1011 according to the invention on the left side, using the hinge according to the invention on the right side. An embodiment of polarized 3D glasses 1020 with a half wave plate 1021 rotatable is shown.

The polarized 3D glasses 1010 is a form in which a polarization state is controlled by detaching a half-wave plate (ie, a 180-degree phase delay plate) to one lens of 3D polarized glasses in which left and right lenses are mutually orthogonal polarization states. Half-wave plates (phase retardation plates) are birefringent media that cause 180-degree phase shifts between orthogonal ordinary and extraordinary waves. In the present invention, a phase compensator such as a cabinet compensator is also referred to as a half-wave plate if the phase shifter is set to 180 degrees.

According to the principle of polarization, when the light of the linearly polarized light passes through the half-wave plate, the linearly polarized light is orthogonal to the incident light. When the light of the circularly polarized light passes through the half-wave plate, the circularly polarized light is orthogonal to the incident light (that is, the light of the left circularly polarized light is the half-wave plate. When it passes through, it becomes light of right circularly polarized light which is orthogonal to incident light). Using this principle, in the present invention, the half-wave plate 1011 is detached and adjusted to switch between 3D viewing and 2D viewing. In one example of the detachable adjustment structure, a half-wave plate 1011 is detached by providing a long detachable structure around the 3D polarizing glasses lens.

As another example of the desorption control structure, a hinge structure may be adopted. For example, when the left eye lens of the polarizing glasses is left circularly polarized and the right eye lens is right circularly polarized, the left image of the 3D image is displayed in the left circularly polarized state, and the right image is displayed in the right circularly polarized state, Watch 3D video. When the user adjusts the half-wave plate to the mounted state and the half-wave plate passes incident light in front of the polarizing lens (for example, when the user's right eye lens is in the right circular polarization and the half-wave plate is mounted to the left circularly polarized state), the two lenses of the user The same polarization state is changed to view the 2D image. Or of course it can be configured in reverse.

FIG. 10C is a side view of the 3D polarized 3D glasses adopting a hinge structure, in which a half-wave plate 1021 is attached to the glasses by a hinge to easily switch 2D viewing and 3D application while rotating 90 degrees. If the hinge structure is adopted, automatic switching as well as manual switching is possible.

As another example, when the lens of the polarizing glasses is in a linearly polarized state, one of the left and right lenses may be rotated by 90 degrees to change the 3D glasses to 2D glasses or the 2D glasses to 3D glasses. The structure for easily performing the 90 degree rotation of the lens can use one of the structures well known to those skilled in the art.

In another embodiment, a half-wave plate may be detachably attached to one lens of the 2D polarizing glasses to change the 3D polarizing glasses.

In another embodiment, when the half-wave plate is attached to only one lens, the light intensity passing through the lens is lowered, so that the transmitted light intensity is applied to the other lens as shown in FIG. The glasses 1030 can be configured to mount together a slightly lowered transparent or translucent film 1022.

In another embodiment, 2D one-eye viewing can be achieved by adjusting the desorption with the light blocking plate instead of the half-wave plate.

In the above, the mechanical switching between 3D image viewing and 2D image viewing using polarized 3D glasses was described with reference to FIGS. 10A to 10D. Hereinafter, the 3D image viewing and the 2D image viewing will be described with reference to FIGS. 11 and 12. The electrical conversion of is described.

11 shows polarized 3D glasses including the electrically controlled polarizer of the present invention. The shutter lens structure of the shutter-type 3D glasses is composed of a polarizing film 1, a liquid crystal, and a polarizing film 2 as shown in FIG. 11A.

The conventional shutter lens is configured such that the polarization directions of the polarizing film 1 and the polarizing film 2 are orthogonal to each other if the liquid crystal is a TN (Twisted Nematic) liquid crystal.

In this case, when no voltage is applied to the liquid crystal, the TN liquid crystal converts the polarization direction of incident light by 90 degrees, for example, converts incident light of horizontally polarized light passing through the polarizing film 1 into vertically polarized light, and the light passes through the polarizing film 2. When a voltage is applied to the liquid crystal, the TN liquid crystal maintains the polarization direction of the incident light so that the incident light of the horizontal polarized light passing through the polarizing film 1 is blocked by the polarizing film 2 having the vertical polarization direction as it is and operated by the shutter according to the applied voltage. . In FIG. 11, illustration of a component such as a protective glass that does not affect polarization filtering of light is omitted.

In one example of the electrically controlled polarizer according to the present invention, the liquid crystal and one polarizing film are constituted as main components, as shown in the right eye lens (ie, the assembly for the right eye lens) 1105 of FIG. 11B. In addition to the TN liquid crystal, other liquid crystals such as STN, VA, and IPS may be used, and the liquid crystal is mainly described for the TN liquid crystal.

When the light displayed by the display is incident on the polarizing glasses of FIG. 11B, the left eye lens (ie, the assembly for the left eye lens) 1104 is composed of a polarizing film of vertical polarization to pass only incident light of vertical polarization. In addition, the right eye lens 1105 is composed of a TN liquid crystal and a polarizing film, and when no voltage is applied to the liquid crystal, when the incident light of the horizontal polarized light enters the right eye lens, the TN liquid crystal rotates the polarization direction of the light by 90 degrees to make the vertically polarized light. When the incident light of the right polarized light passes through the polarizing film of the right eye lens and the incident light of the vertical polarized light enters the right eye lens, the TN liquid crystal rotates the polarization direction of the light by 90 degrees to make the horizontal polarized light and is blocked by the polarizing film of the right eye lens.

* When no voltage is applied to the liquid crystal, only incident light with vertical polarization passes through the left eye lens, and only incident light with horizontal polarization passes through the right eye lens. Will see the 3D image.

To switch to viewing the 2D image, the user applies a voltage to the TN liquid crystal of the right eye lens 1105 so that the TN liquid crystal maintains the polarization direction of the light as it is. Then, the incident light of the horizontal polarized light to the right eye lens is blocked and the incident light of the vertical polarized light is passed, so that only the left and right eye lenses pass the incident light of the vertical polarized light, so that the user sees the 2D image.

Since only the right eye lens has added liquid crystals, the light intensity passing through the right eye lens is lowered. Therefore, a transparent or semi-transparent film may be added to the left eye lens to slightly lower the transmitted light intensity to match the transmitted light intensity of both lenses equally. .

Another example of the electrically controlled polarizer according to the present invention is composed of a liquid crystal and a polarizing film in the same way as the right eye lens as in FIG. 11C. The left eye lens 1106 passes only incident light of vertical polarization into a horizontal polarization state when no voltage is applied to the TN liquid crystal, and the right eye lens 1107 vertically polarizes only incident light of horizontal polarization when a voltage is not applied to the TN liquid crystal. Change to state and pass. In this way the user sees a 3D image.

In order to switch to viewing 2D video, for example, if a TN liquid crystal is applied to the TN liquid crystal of the right eye lens 1107 and the TN liquid crystal maintains the polarization direction of the light as it is, the incident light of the horizontal polarized light is blocked and the incident light of the vertical polarized light is passed. Therefore, the left eye lens and the right eye lens both pass the incident light of vertical polarization, so the user sees the 2D image.

As another example, the polarizer film may be changed to view a 2D image when no voltage is applied to the lens, and a 3D image may be configured when the voltage is applied to one lens.

Another example of the electrically controlled polarizer of the invention consists of a quarter wave plate (90 degree phase delay plate) added to the liquid crystal and the polarizing film as shown in FIG. The quarter wave plate (90 degree phase delay plate) is a birefringent medium that causes a 90 degree phase shift between orthogonal ordinary and extraordinary waves. In the present invention, the phase compensator is also referred to as a quarter wave plate if the phase compensator is set to 90 degrees.

When the light displayed by the display is incident on the polarized glasses of FIG. 11D, the left eye lens 1108 is composed of a quarter wave plate and a polarization film of vertical polarization, and according to the material of the quarter wave plate and the optical axis direction. For example, only incident light of left circularly polarized light is passed. That is, when the incident light of the left circularly polarized light passes through the quarter wave plate, the incident light is converted into vertically polarized light and the incident light of the right circularly polarized light is blocked.

The right eye lens 1109 is composed of a quarter wave plate, a TN liquid crystal, and a polarizing film, and when no voltage is applied to the liquid crystal, when the incident light of the right circle polarized light enters the right eye lens, horizontal polarization is performed through the quarter wave plate. TN liquid crystal rotates the polarization direction of the light by 90 degrees to make vertically polarized light and passes through the polarizing film of the right eye lens.When the incident light of the left circularly polarized light enters the right eye lens, it is converted into vertically polarized light through the quarter-wave plate. It rotates the polarization direction of light 90 degrees to make horizontally polarized light and blocks it from the polarizing film of the right eye lens.

When no voltage is applied to the liquid crystal, only incident light of left circularly polarized light passes through the left eye lens, and only incident light of right circularly polarized light passes through the right eye lens, and when the display displays the left eye image with left circular polarization and right eye polarization, the user You will see a 3D image.

When the user switches to viewing the 2D image, when a voltage is applied to the TN liquid crystal of the right eye lens 1109 and the TN liquid crystal maintains the polarization direction of the light as it passes, the incident light of the right circularly polarized light is blocked and the incident light of the left circularly polarized light is passed to the left eye lens. Both the right eye and left eye only pass incident light from the left circularly polarized light, so the user sees a 2D image. Here, in order to match the transmitted light intensities of both lenses equally, a transparent or semitransparent film may be added to the left eye lens to slightly lower the transmitted light intensity.

Another example of the electrically controlled polarizer according to the present invention is composed of a 1/4 wavelength plate, a liquid crystal, and a polarizing film, similarly to the right eye lens, as in FIG. 11E. The left eye lens 1110 changes only the incident light of the left circularly polarized light into a horizontally polarized state when no voltage is applied to the TN liquid crystal, and the right eye lens 1111 vertically polarizes only the incident light of the right circularly polarized light when no voltage is applied to the TN liquid crystal. Change to state and pass. In this way the user sees a 3D image.

In order to switch to viewing 2D images, for example, when a voltage is applied to the TN liquid crystal of the right eye lens 1111 and the TN liquid crystal maintains the polarization direction of the light as it is, the incident light of the right circularly polarized light is blocked and the incident light of the left circularly polarized light is passed. The left eye lens and the right eye lens both pass only incident light from the left circularly polarized light, so the user sees a 2D image.

As another example, the direction of one polarizing film may be changed to view a 2D image when no voltage is applied to the lens, and the 3D image may be viewed when a voltage is applied to one lens.

Until now, the transition between a state in which no voltage is applied to both lenses and a state in which voltage is applied to only one lens has been described, but those skilled in the art can modify the above-described embodiments within the scope of the technical idea of the present invention. It is a matter of course that an embodiment can be constructed between a state in which voltage is applied to all four lenses and a state in which voltage is applied to only one lens.

12A and 12B are operation diagrams of circularly polarized lenses including the electrically controlled polarizer of the present invention.

12A and 12B, when the light displayed by the display is incident on the polarized glasses, the quarter wave plate is a material such as negative uniaxial crystal, and the optical axis of the quarter wave plate is perpendicular to the vertical as shown in the figure. When the angle is achieved, the incident light L1 of the left circularly polarized light is changed into the light L2 of the vertically polarized light through the quarter wave plate, and the incident light R1 of the right circularly polarized light is turned into the light R2 of the horizontal polarization through the quarter wave plate.

If the quarter-wave plate is a material such as positive uniaxial crystals, the opposite polarization change occurs, and the description of the present invention focuses on the minor uniaxial crystal material.

When no voltage is applied to the TN liquid crystal, only the light R2 of horizontally polarized light passes through the electrically controlled polarizer including the liquid crystal and the polarizing film as shown in FIG. 12A, and becomes the polarization R3, and the light L2 of the vertically polarized light is blocked. When a voltage is applied to the TN liquid crystal, only the light L2 of the vertically polarized light passes through the electrically controlled polarization separator composed of the liquid crystal and the polarizing film as shown in FIG. 12B to become the polarization L3 and the light R2 of the horizontal polarization is blocked.

Therefore, when no voltage is applied to the liquid crystal, only incident light R1 of right circularly polarized light passes. When voltage is applied to the liquid crystal, only incident light L1 of left circularly polarized light passes.

While conventional polarized glasses are passive, polarized glasses with an electrically controlled polarizer are active like shutter glasses. However, polarized glasses including an electrically controlled polarizer are simpler and cheaper than shutter glasses. The reason is that shutter glasses need to open and close shutters at high speeds of several tens of Hz or more.However, polarized glasses with an electrically controlled polarizer keep the liquid crystal voltage off when viewing 3D images and the liquid crystal voltage when viewing 2D images. It is simple to operate and low power consumption because it keeps On state by switching operation every few minutes or several tens of minutes. In addition, when switching between 2D viewing and 3D viewing only in 3D glasses, there is no need for wired or wireless communication between the terminal and the 3D glasses. Therefore, it is cheaper than shutter glasses and consumes less power.

Although a liquid crystal has been described as an example of an electrically controlled polarizer, a medium capable of electrically changing birefringence using Kerr effect or Pockels effect may be used instead of liquid crystal.

10 to 12 have described the differential situation when using the polarized 3D glasses, the detailed switching method between viewing the 3D video and 2D video when using the polarized 3D glasses and the embodiment using the shutter-type 3D glasses Similarly omitted.

In addition, although the liquid crystal is interposed between the 1/4 wavelength plate and the film in FIGS. 11 to 12, the configuration of the lens assembly is not limited thereto, and the liquid crystal may be disposed outside the 1/4 wavelength plate or the film. Of course.

Meanwhile, the present invention is equally applied to color filter type 3D glasses. 13 illustrates a differential situation when the color filter type 3D glasses are used.

The computer 1304 displays a 2D image or a 3D image on a monitor 1302 equipped with a color filter or color element, but the color filter / color element of the monitor 1302 is a combination of color elements for which a left eye image is specified (eg, A combination of independent color elements (e.g., R2, G2, B2), which is operated to display with a weighted combination of R1, G1, B1 wavelength elements, and excludes the color elements R1, G1, B1 of the left eye image. Weighted combination of wavelength components).

That is, the color filter / color element of the monitor 1302 is composed of R1, G1, B1 corresponding to the left eye image, and R2, G2, B2 corresponding to the right eye image.

R1 and R2 are both red, but the wavelengths are small and are red color elements that exclude each other. Similarly, G1 and G2 are green color elements that exclude each other, and B1 and B2 are blue color elements that exclude each other.

The left eye lens of the 3D color filter glasses 1306 passes the light in the wavelength bands R1, G1, B1 and blocks the light in the R2, G2, B2 wavelength band, and the right eye block the light in the R1, G1, B1 wavelength band, and the R2, Passes light through the G2 and B2 wavelength bands. Then, the left eye lens passes only the left eye image and the right eye lens passes only the right eye image, so that the user views the 3D image.

The two lenses of the 2D color filter glasses 1307 are composed of the same color filter so that only the light composed of the combination of the same color elements passes through the user to view the 2D image. In general, there is no need for wired or wireless communication between the computer and the color filter glasses. In the present invention, the user prepares two color filter glasses (3D color filter glasses 1306 and 2D color filter glasses 1307). When the user wears the 3D color filter glasses 1306 and views the 3D image and feels eye fatigue, the user manually switches to the 2D color filter glasses 1307 to view the 2D image.

Another embodiment replaces one lens of the 3D color filter glasses 1306 with a lens having the same color filter as the other lens to make the 2D color filter glasses to switch to viewing the 2D image. FIG. 13 describes the differential situation when using the color filter type 3D glasses, and the detailed switching method between viewing the 3D image and the 2D image when using the color filter 3D glasses is similar to the embodiment using the shutter type 3D glasses. It will be omitted.

As mentioned above, the structure of the present invention has been described in detail with reference to some preferred embodiments, but this is only an example and the protection scope of the present invention is not limited thereto. Those skilled in the art will be able to easily make various changes and modifications within the scope of the technical idea of the present invention from the description herein. Therefore, the protection scope of the present invention should be defined by the following claims.

Claims (13)

A pair of glasses for a polarized 3D display device in which a left eye image and a right eye image are expressed by polarizations that are orthogonal to each other.
A left eye lens and a right eye lens each passing only one of the polarization of the left eye image and the polarization of the right eye image,
A half-wave plate for retarding the incident light by 180 degrees,
A frame configured to arrange either the left eye lens or the right eye lens and the half-wave plate in parallel or withdrawal
Glasses for 3D display device comprising a. The method of claim 1,
The half-wave plate is detachably attached to or removed from the frame glasses for 3D display device. The method of claim 1,
The half-wave plate is connected to the hinge attached to the frame is rotated more than 90 degrees and disposed or removed parallel to the left eye lens or right eye lens. The method of claim 1,
And the left eye lens and the right eye lens pass polarization of the left eye image and polarization of the right eye image, respectively. The method of claim 1,
Both the left eye lens and the right eye lens pass only one of the polarization of the left eye image or the polarization of the right eye image. In the eyeglasses for polarized 3D display device in which the left eye image and the right eye image are expressed with polarizations orthogonal to each other,
A left eye lens and a right eye lens for passing a specific polarized light,
A frame configured to maintain the left eye lens or the right eye lens, wherein the left eye lens or the right eye lens is rotatable 90 degrees.
Glasses for polarizing 3D display device comprising a. As glasses for polarizing 3D display apparatuses, In glasses for 3D display apparatuses which can switch between 2D and 3D,
A left eye lens and a right eye lens composed of a vertical polarization lens or a horizontal polarization lens,
A liquid crystal attached to at least one of the left eye lens and the right eye lens;
A mode control unit for supplying power to the liquid crystal according to a control signal for determining a mode for viewing in 2D or 3D
Glasses for 3D display device comprising a. The method of claim 7, wherein
Liquid crystals are attached to both the left eye lens and the right eye lens, and the polarization characteristics of the left eye lens and the right eye lens are orthogonal to each other. The method of claim 7, wherein
Glasses for the 3D display device further comprises a mode determination unit for determining the control signal. As glasses for polarizing 3D display apparatuses, In glasses for 3D display apparatuses which can switch between 2D and 3D,
A left eye lens assembly and a right eye lens assembly composed of a quarter wave plate and a polarizing film,
A liquid crystal further included in at least one of the left eye lens assembly and the right eye lens assembly;
A mode control unit for supplying power to the liquid crystal according to a control signal for determining a mode for viewing in 2D or 3D
Glasses for 3D display device comprising a. The method of claim 10,
The liquid crystal is included in both the left eye lens assembly and the right eye lens assembly, and the polarization characteristics of the left eye lens assembly and the right eye lens assembly are orthogonal to each other. In the 2D / 3D mode automatic switching method of the glasses for 3D display device,
Setting an automatic switching factor,
Automatically switching the 2D / 3D mode according to the set automatic switching factor;
2D / 3D mode automatic switching method of the glasses for the 3D display device comprising a. The method of claim 12,
The setting of the automatic conversion factor is a 2D / 3D mode automatic switching method of the glasses for 3D display device to set the automatic conversion factor according to the level of dizziness and eye fatigue felt by the user during 3D viewing.

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