KR100995505B1 - 3d vision glasses - Google Patents

Abstract

PURPOSE: 3D vision glasses is provided to implement a normal operation even if eyeglasses wearers turn their neck or moves. CONSTITUTION: Liquid crystal lenses(110,120) intercept and pass light. The liquid crystal lens blocks the light when receiving an operation voltage. A synchronized signal receiver(130) receives a synchronization signal from a 3D display device. A controller(220) controls the operation of the liquid crystal lens based on the synchronization signal. An oscillating circuit(210) generates an oscillating signal corresponding to the synchronization signal.

Description

Glasses for stereoscopic image {3D VISION GLASSES}

The disclosed technology relates to glasses for stereoscopic images, wherein the stereoscopic images can be viewed in association with a display device for outputting stereoscopic images.

Glasses for stereoscopic images can display a planar image in three dimensions by showing different images to both eyes of the viewer. For example, when the image photographed by two cameras is output from the display device, the stereoscopic image glasses may separate the image and send the image to the viewer's right or left eye. There are two types of glasses for stereoscopic images: passive and active glasses, blue glasses and polarized glasses, and shutter glasses.

Among the embodiments, the glasses for stereoscopic images include a right liquid crystal lens, a left liquid crystal lens, a tuning signal receiver, a controller, and an oscillator circuit. The right liquid crystal lens and the left liquid crystal lens block or transmit light. For example, the liquid crystal lens transmits light when an operating voltage is supplied. The tuning signal receiver receives the tuning signal transmitted from the stereoscopic image display apparatus. The controller controls operations of the right liquid crystal lens and the left liquid crystal lens based on the tuning signal. The oscillation circuit section generates an oscillation signal having a frequency corresponding to the tuning signal. The control unit controls operations of the right liquid crystal lens and the left liquid crystal lens based on the tuning signal when the tuning signal is a normal signal, and the right liquid crystal lens based on the oscillation signal when the tuning signal is an abnormal signal. And control the operation of the left liquid crystal lens.

In one embodiment, the control unit includes a tuning signal input module for receiving a tuning signal from the tuning signal receiving unit; An oscillation signal input module receiving an oscillation signal from the oscillation circuit; A comparison module for comparing the tuning signal and the oscillation signal at predetermined intervals and selecting the tuning signal when the tuning signal is a normal signal and selecting the oscillating signal when the tuning signal is an abnormal signal; And a control signal generation module configured to generate control signals for controlling operations of the right liquid crystal lens and the left liquid crystal lens based on the signal selected by the comparison module. For example, the comparison module may compare the tuning signal and the oscillation signal, and may initialize the oscillation circuit if the error of the oscillation signal for the tuning signal is greater than the allowable value. As another example, when the normal tuning signal is inputted after the oscillation signal is selected, the comparison module may select the input tuning signal and initialize the oscillation circuit portion.

In another embodiment, the control unit turns off the right liquid crystal lens in a first period of the tuning signal, turns off the left liquid crystal lens in a second period of the tuning signal, When the first and second periods are switched, the right liquid crystal lens and the left liquid crystal lens may be turned on. For example, the first and second periods of the tuning signal may be repeated, and the right image may be output in the first period and the left image may be output in the second period.

1 is a view for explaining a stereoscopic image glasses according to an embodiment of the disclosed technology.
2 is a view for explaining the configuration of the glasses for stereoscopic images of FIG. 1 in detail.
3 is a view for explaining the control unit of FIG. 2 in detail.
FIG. 4 is a diagram illustrating a case where a tuning signal received by the glasses for stereoscopic images of FIG. 1 is normal.
FIG. 5 is a diagram illustrating a case where a tuning signal received by the glasses for stereoscopic images of FIG. 1 is abnormal.
FIG. 6 is a view for explaining a method of matching a tuning signal and an oscillation signal received by the stereoscopic glasses of FIG. 1;
7 is a view for explaining the operation of the glasses for stereoscopic images of FIG.
FIG. 8 is a view for explaining an error component that may be generated during the operation of the stereoscopic vision glasses of FIG. 1 and a method for correcting the error component.

The description of the disclosed technique is merely an example for structural or functional explanation and the scope of the disclosed technology should not be construed as being limited by the embodiments described in the text. That is, the embodiments may be variously modified and may have various forms, and thus the scope of the disclosed technology should be understood to include equivalents capable of realizing the technical idea.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, the first component may be named a second component, and similarly, the second component may also be named a first component.

The term “and / or” should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of "first item, second item and / or third item" may be presented from two or more of the first, second or third items as well as the first, second or third item It means a combination of all the items that can be.

When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, it should be understood that no component exists. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprise" or "have" refer to features, numbers, steps, operations, components, parts, or parts thereof described. It is to be understood that the combination is intended to be present and does not preclude the existence or addition of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Generally, the terms defined in the dictionary used are to be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

1 is a view illustrating glasses for a stereoscopic image according to an embodiment of the disclosed technology.

Referring to FIG. 1, the glasses 100 for stereoscopic images include a right liquid crystal lens 110, a left liquid crystal lens 120, and a tuning signal receiver 130. In one embodiment, the right liquid crystal lens 110, the left liquid crystal lens 120 and the tuning signal receiver 130 is installed in the spectacle frame 140. Glasses frame 140 may be modified in various forms according to the needs of those skilled in the art.

The right liquid crystal lens 110 and the left liquid crystal lens 120 block or transmit light according to whether an operating voltage is applied. In one embodiment, the liquid crystal lens (liquid lens) is composed of the liquid crystal is filled between the transparent electrode and the amount of light transmitted by the magnitude of the voltage applied to the transparent electrode on both sides can be adjusted. The driving method of the liquid crystal lens may include a twisted nematic (TN) method, a vertical alignment (VA) method, and an in place switching (IPS) method. In one embodiment, the liquid crystal lens of the TN method may block light when the operating voltage is supplied, and transmit light when the supply of the operating voltage is blocked. In another embodiment, the VA type liquid crystal lens may transmit light when a voltage is applied, and block light when the voltage is blocked.

The tune signal receiver 130 receives a tune signal transmitted from a stereoscopic image display device (not shown). In one embodiment, the stereoscopic image display apparatus may be provided with a tuning signal transmitter on the front surface, and may transmit a tuning signal through the installed tuning signal transmitter. For example, the tuning signal may comprise an infrared pulse signal.

Fig. 2 is a diagram for explaining the configuration of the stereoscopic image glasses of Fig. 1 in detail.

2, the glasses 100 for stereoscopic images further include an oscillation circuit 210, a controller 220, a first switching circuit 230, and a second switching circuit 240. In one embodiment, the oscillator circuit portion 210, the control portion 220, the first switching circuit portion 230, and the second switching circuit portion 240 may be modularized on the substrate and installed inside the spectacle frame 140 of FIG. 1 . Since the electrical connection between the components can be variously modified according to the needs of those skilled in the art, the disclosed technology is not limited to specific ones. In one embodiment, the modular substrate may be installed inside the tuning signal receiver 130, which is the center of the spectacle frame 140. When the modular substrate is installed in the center, the electrical connection between the components can be configured symmetrically. For example, when an electrical connection relationship is formed in a left-right symmetry structure, the controller 220 may more accurately control the right liquid crystal lens 110 and the left liquid crystal lens 120 based on the tuning signal.

The oscillation circuit unit 210 outputs an oscillation signal having a frequency corresponding to the tuning signal. In one embodiment, when the tuning signal is 240 Hz, the oscillation circuit 210 may output an oscillation signal having a frequency of 240 Hz, 480 Hz or 720 Hz. For example, when the oscillation signal is 480 Hz, the controller 220 may generate a control signal corresponding to the odd-numbered input signal or the even-numbered input signal of the input oscillation signal. In one embodiment, the tuning signal may be generated such that the signals of the first and second periods are repeated, and the oscillating circuit 210 may output an oscillation signal corresponding to the signals of the first and second periods of the tuning signal. have. In an embodiment, the controller 220 may generate a shutdown signal based on the oscillation signal.

The controller 220 controls the operations of the right liquid crystal lens 110 and the left liquid crystal lens 120 based on the tuning signal received by the tuning signal receiver 130. In one embodiment, the controller 220 generates a control signal including a turn-on and a turn-off signal and outputs the control signal to the right liquid crystal lens 110 and the left liquid crystal lens 120 ) Can be controlled.

The first switching circuit unit 230 is electrically connected between the control unit 220 and the right liquid crystal lens 110, and the second switching circuit unit 240 is electrically connected between the control unit 220 and the left liquid crystal lens 120. do. In an exemplary embodiment, the first switching circuit unit 230 and the second switching circuit unit 240 may block or transmit control signals transmitted from the controller 220 to the right liquid crystal lens 110 and the left liquid crystal lens 120. . For example, when a shutdown signal is applied from the controller 220 to the first switching circuit unit 230, the right liquid crystal lens 110 can control the light to be blocked regardless of the control signal.

In FIG. 2, signals for controlling the operations of the right liquid crystal lens 110 and the left liquid crystal lens 120 are transmitted from left to right, and turn on or turn the first switching circuit 230 and the second switching circuit 240. The shutdown signal to turn off may be input to an upper portion of the first switching circuit unit 230 and a lower portion of the second switching circuit unit 240. In other words, the control signal and the shutdown signal output from the controller 220 may be independently transmitted, and the shutdown signal may take precedence over the control signal.

The control unit 220 controls the operation of the right liquid crystal lens 110 and the left liquid crystal lens 120 based on the received tuning signal when the tuning signal received by the tuning signal receiving unit 130 is a normal signal When the received tuning signal is an abnormal signal, operations of the right liquid crystal lens 110 and the left liquid crystal lens 120 may be controlled based on the oscillation signal generated by the oscillation circuit 210.

FIG. 3 is a diagram for explaining the control unit 220 of FIG. 2 in detail.

3, the control unit 220 may include a tuning signal input module 310, an oscillation signal input module 320, a comparison module 330, and a control signal generation module 340.

The tuning signal input module 310 may receive a tuning signal received by the tuning signal receiver 130. In one embodiment, the tuning signal input module 310 may perform filtering on the input tuning signal. For example, filtering may amplify the input tuned signal and then remove the noise using a band pass filter. As another example, the noise canceled signal may be attenuated into a signal that can be processed by the control signal generation module 340.

The oscillation signal input module 320 may receive an oscillation signal generated by the oscillation circuit 210. In one embodiment, the oscillation signal input module 320 may convert the input oscillation signal into a signal that can be processed by the control signal generation module 340.

The comparison module 330 may compare the tuning signal input to the tuning signal input module 310 and the oscillation signal input to the oscillation signal input module 320. In one embodiment, the comparison of the tuning signal and the oscillation signal may be performed at regular intervals. For example, the comparison of signals can be performed every period of the tuned signal. In one embodiment, the comparison module 330 may select a tuning signal when the tuning signal is a normal signal and select an oscillation signal when the tuning signal is an abnormal signal. For example, when the oscillation signal is selected, the comparison module 330 blocks the tuning signal from being transmitted from the tuning signal input module 310 to the control signal generation module 340, and the oscillation signal is oscillating signal input module 320. May be transmitted to the control signal generation module 340.

The control signal generation module 340 may generate a control signal for controlling the operations of the right liquid crystal lens 110 and the left liquid crystal lens 120 based on the signal selected by the comparison module 330. [ In one embodiment, the control signal generation module 340 generates a shutdown signal for shutting down the first switching circuit unit 230 and the second switching circuit unit 240 based on the oscillation signal input from the oscillation signal input module 320 can do.

FIG. 4 is a diagram illustrating a case where a tuning signal received by the glasses for stereoscopic images of FIG. 1 is normal.

In FIG. 4, the tuning signal Sync_signal may be input as a pulse signal in each period, and the right control signal R_signal transmitted from the controller 220 to the right liquid crystal lens 110 may be a first period of the tuning signal Step_1. And the left control signal L_signal transmitted from the control unit 220 to the left liquid crystal lens 120 may be turned on in the second period (Step_2) It may be turned on in the first period Step_1 of and turned off in the second period Step_2. In one embodiment, the oscillation signal Oscil_signal may correspond to the sync signal Sync_signal, and when the sync signal Sync_signal is normal, the oscillation signal Oscil_signal may be provided only for the generation of the shutdown signal.

On the other hand, when the spectator (user) turns his / her head while wearing the stereoscopic glasses 100, the tuning signal may not be inputted to the tuning signal receiving unit 130.

FIG. 5 is a diagram illustrating a case where a tuning signal received by the glasses for stereoscopic images of FIG. 1 is abnormal. Specifically, the case where the input of the tuning signal Sync_signal is stopped in the second period Step_2 is described as an example.

In one embodiment, the comparison module 330 of the control unit 220 selects the tuning signal normally input in the first period (Step_1), the control signal generation module 340 is transmitted from the tuning signal input module 310 A control signal is generated based on the tuning signal. The comparison module 330 selects the oscillation signal in the second period Step_2 where the tuning signal is abnormally input, and the control signal generation module 340 controls the oscillation signal transmitted from the oscillation signal input module 320. Generate a signal. Thereafter, the comparison module 330 directly checks whether the tuning signal is normal, and when the tuning signal is restored to normal, the comparison module 330 selects a normally input tuning signal, and the control signal generating module 340 The control signal is generated based on the tuning signal transmitted from the tuning signal input module 310.

On the other hand, the frequency of the oscillation signal generated by the oscillation circuit 210 may not be exactly the same as the frequency of the tuning signal. In other words, when the oscillation signals are compared based on the tuning signal, an error component may occur, and when the error components accumulate over time, the stereoscopic image glasses 100 may operate abnormally.

FIG. 6 is a diagram illustrating a method of matching a tuning signal and an oscillation signal received by the glasses for stereoscopic images of FIG. 1.

At 6, the error [Delta] t of the oscillation signal with respect to the tuning signal increases in multiples every cycle. The error Δt of the oscillation signal generated in the first period is twice (2Δt) in the second period, and triples (3Δt) in the next period. If the process continues, when the comparison module 330 selects the oscillation signal, the image output of the stereoscopic image display apparatus and the operation of the stereoscopic image glasses 100 may be displaced.

In one embodiment, the comparison module 330 may compare the tuning signal and the oscillation signal and initialize the oscillation circuit unit 210 when the error of the oscillation signal with respect to the tuning signal is larger than the allowable value. For example, when the allowable value is "3Δt", the error of the oscillation signal becomes larger than the allowable value as the next first period passes, and the comparison module 330 initializes the oscillator circuit 210 in the next second period ( Ti). As another example, if the normal tuning signal is input after the oscillation signal is selected, the comparison module 330 may select the tuned signal and initialize the oscillation circuit 210.

7 is a view for explaining the operation of the glasses for stereoscopic images of FIG.

In FIG. 7, when the stereoscopic image display apparatus outputs the right image in the first period Step_1 of the tuning signal, the controller 220 switches the right liquid crystal lens 110 to the pass state and the left liquid crystal lens 120. Switch to the blocked state.

Since the stereoscopic image display device switches the output image from the right image to the left image at the time of switching from the first period (Step_1) to the second period (Step_2) of the tuning signal, the controller 220 controls the right liquid crystal lens 110 And the left liquid crystal lens 120 is switched to the blocking state.

When the stereoscopic image display device outputs the left image in the second period (Step_2) of the tuning signal, the controller 220 switches the right liquid crystal lens 110 to the cutoff state and switches the left liquid crystal lens 120 to the pass state do.

The point of time when the tuning signal is switched from the second period Step_2 to the first period Step_1 is a process in which the 3D image display device converts the output image from the left image to the right image, so that the controller 220 controls the right liquid crystal lens 110. And the left liquid crystal lens 120 is switched to the blocking state.

The first and second periods of the tuning signal may then be repeated and the controller 220 may control the operation of the right liquid crystal lens 110 and the left liquid crystal lens 120 corresponding to the first and second periods of the repeated tuned signal, Control the operation.

The disclosed technology may block both the right liquid crystal lens 110 and the left liquid crystal lens 120 at the time when the first period Step_1 and the second period Step_2 are switched, thereby further improving the sharpness of the stereoscopic image. This is because deterioration of sharpness due to duplication and mutual interference of right and left images can be prevented.

On the other hand, when the viewer turns or moves his / her head in the state of wearing the three-dimensional image glasses 100, the synchronization between the three-dimensional image display device and the three-dimensional image glasses 100 may not be smooth. If the tuning is not smooth, superimposition and / or interference may occur on the image, and the amount of light passing through the three-dimensional image glasses 100 may decrease, causing inconvenience to the viewer.

FIG. 8 is a diagram illustrating an error component that may occur in the process of operating the stereoscopic image glasses of FIG. 1 and a method of correcting the same.

8, the error component includes a first time delay DELTA t1 from when the right control signal R_signal output from the controller 220 is input to the right liquid crystal lens 110, A second time delay Δt2 until L_signal is input to the left liquid crystal lens 120 may be included. The error component may be a factor to reduce the sharpness of the stereoscopic image. Further, the overlaps OL1 and OL2 generated by the first time delay DELTA t1 and the second time delay DELTA t2 may overlap the left and right images, or they may interfere with each other.

In an exemplary embodiment, the controller 220 generates a shutdown signal for blocking both the right liquid crystal lens 110 and the left liquid crystal lens 120 at the time when the first period Step_1 and the second period Step_2 are switched. To the right liquid crystal lens 110 and the left liquid crystal lens 120, respectively. The first time delay Δt1 and / or the second time delay Δt2 is corrected by the shutdown signal Shutdown_signal so that the actual off time (pass state time) of the right liquid crystal lens 110 is “T1”, and the left liquid crystal is The off time of the lens 110 is "T2". At off time, light may pass through the liquid crystal lens. Therefore, even if the first time delay and / or the second time delay occurs, the sharpness of the stereoscopic image may be further improved.

If the off time T1 of the right liquid crystal lens 110 and / or the off time T2 of the left liquid crystal lens 110 are larger than the first time delay? T1 and / or the second time delay? T2, As this becomes shorter, the amount of light passing through the 3D glasses 100 may decrease. In one embodiment, when the off-time of the right liquid crystal lens 110 is shorter than the threshold time, the controller 220 controls the first switching circuit unit 230 to maintain the turn-off state at the time when the first and second periods are switched have. When the first switching circuit unit 230 is turned off, the off time of the right liquid crystal lens 110 is increased to obtain a sufficient light amount. The case of the left liquid crystal lens 120 may also correspond. The threshold time may be an off time of the liquid crystal lens to obtain a minimum amount of light necessary for the convenience of viewing an image.

The clarity of the image and the amount of light can be secured according to the threshold time setting. For example, the threshold time may be set shorter when priority is given to ensuring the clarity of the image, and the threshold time may be set longer when the amount of light is secured. The threshold time can be adjusted by the viewer's manipulation and can also vary according to the needs of those skilled in the art. For example, when viewing in a dark room it may be more important to secure the clarity, and when viewing in a bright room it may be more important to secure the amount of light. In one embodiment, the light amount sensor is installed in the three-dimensional image glasses 100, the control unit 220 determines the indoor environment (degree of brightness) based on the amount of light detected by the light amount sensor and automatically adjusts the threshold time. Can be set.

The disclosed technique may have the following effects. It is to be understood, however, that the scope of the disclosed technology is not to be construed as limited thereby, as it is not meant to imply that a particular embodiment should include all of the following effects or only the following effects.

Glasses for stereoscopic images according to an embodiment may provide convenience to a viewer. This is because normal operation can be maintained even if the viewer turns his head or moves while wearing the stereoscopic glasses.

In addition, the glasses for stereoscopic images according to an embodiment can watch a clear stereoscopic image. It is possible to block all the input images at the time when the right image and the left image are switched. For example, it is possible to prevent the left image from being displayed with the afterimage of the right image remaining or the right image from being displayed with the afterimage of the left image remaining.

In addition, in one embodiment, the glasses for stereoscopic images can prevent a decrease in the amount of light that may be generated by the shutter operation. For example, when the amount of light that passes through the glasses for stereoscopic images is lowered, some functions may be released to quickly secure the amount of light, and then the function may be re-executed.

Although described above with reference to the preferred embodiment of the present application, those skilled in the art various modifications and changes to the present invention without departing from the spirit and scope of the present application described in the claims below I can understand that you can.

Claims (5)

A right liquid crystal lens and a left liquid crystal lens which block or transmit light and transmit light when an operating voltage is supplied;
A tuning signal receiver for receiving a tuning signal transmitted from the stereoscopic image display apparatus;
A controller configured to control operations of the right liquid crystal lens and the left liquid crystal lens based on the tuning signal; And
An oscillation circuit section for generating an oscillation signal having a frequency corresponding to the tuning signal;
The control unit
If the tuning signal is a normal signal, the operation of the right liquid crystal lens and the left liquid crystal lens is controlled based on the tuning signal. If the tuning signal is an abnormal signal, the right liquid crystal lens and the left side are based on the oscillation signal. Controls the operation of the liquid crystal lens,
The tuning signal and the oscillation signal are compared at predetermined intervals, and when the tuning signal is a normal signal, the tuning signal is selected. When the tuning signal is an abnormal signal, the oscillation signal is selected. And a comparison module that selects the inputted tuning signal and initializes the oscillation circuit unit when the tuning signal is input. The method of claim 1, wherein the control unit
A tuning signal input module for receiving a tuning signal from the tuning signal receiver;
An oscillation signal input module for receiving an oscillation signal from the oscillation circuit part; And
And a control signal generation module for generating a control signal for controlling operations of the right liquid crystal lens and the left liquid crystal lens based on a signal selected by the comparison module. The method of claim 2, wherein the comparison module
And compares the tuning signal and the oscillation signal, and initializes the oscillation circuit section when an error of the oscillation signal with respect to the tuning signal is larger than a permissible value. delete The method of claim 1,
The control unit
Turns off the right liquid crystal lens in a first period of the tuning signal in which first and second periods are repeated and turns off the left liquid crystal lens in a second period of the tuning signal, And the left liquid crystal lens is turned on at a time point when the first and second periods are switched, and the stereoscopic image display device displays the right image in the first period, Glasses for stereoscopic images, characterized in that the image is output.

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