FR2965693A3 - STEREOSCOPIC IMAGE VIEW GLASSES - Google Patents

Abstract

Stereoscopic image vision goggles have: an input switch configured to control input validity / invalidity of commands received from outside; a command receive interval calculating portion configured to calculate a cycle of each of the commands based on commands received from outside; a command receive period controller configured to determine a receive period of a next command based on the cycle of each of the commands and set the input switch as active during the period; and a filter controller configured to control a left eye filter and a right eye filter that adjust an amount of incident light to the left and right eyes of a viewer, based on commands received from outside during the period for which the command receive period controller has set the input switch as active

Description

STEREOSCOPIC IMAGE VIEW GLASSES

TECHNICAL FIELD The present invention relates to stereoscopic image viewing glasses for receiving synchronization signals transmitted from a stereoscopic image display apparatus which displays stereoscopic images, and allowing a viewer to view stereoscopic images. .

Background technique

Various methods for viewing stereoscopic images have been proposed. One is a stereoscopic image system configured to allow a viewer to view stereoscopic images using: a display apparatus that temporally alternates images forming a stereoscopic image between left and right eye points of view; law ; and image viewing glasses that open / close the shutters arranged in front of the viewer's left and right eyes in synchronization with the left and right view image displays, respectively (eg, Patent Document 1). .

If a wireless radio or infrared ray communication is used to transmit synchronization signals from the stereoscopic image display apparatus to the stereoscopic image viewing glasses, the stereoscopic image viewing glasses receive not only the synchronization signals, but also noises such as background noise and signals emitted from other devices The control of the stereoscopic image viewing glasses can be disturbed by such noises.

Thus, an object of the present invention is to reduce the influence of noise on stereoscopic image vision glasses. US Pat.

Stereoscopic image vision goggles according to one aspect of the present invention have: an input switch configured to control input validity / invalidity of commands received from the outside; a command receive interval calculating portion configured to calculate a cycle of each of the commands based on commands received from outside; a command receive period controller configured to determine a receive period of a next command based on the cycle of each of the commands and set the input switch as active during the period; and a filter controller configured to control a left eye filter and a right eye filter that adjust an amount of incident light to the left and right eyes of a viewer based on commands received from outside when the command receive period controller sets the input switch as active.10 Brief description of the drawings

Fig. 1 shows a configuration of a stereoscopic image system comprising a stereoscopic image display apparatus and stereoscopic image viewing glasses according to the present embodiment; Fig. 2 is a hardware block diagram of the stereoscopic image viewing glasses according to the present embodiment; Fig. 3 is a functional block diagram of the stereoscopic image viewing glasses according to the present embodiment; Figure 4 shows command receiving times that stereoscopic image viewing goggles receive and open / closed orientations of filters; Figure 5 exemplifies a setting of a command receive period by the command receive period controller according to the present embodiment; Figure 6 exemplifies a receipt of commands which is always set as valid during initialization by the controller of command receipt periods; Fig. 7 is a diagram illustrating a receipt of commands which is always set as valid by the command receipt period controller unless the command receive period controller receives a command; and Figure 8 is a flowchart of a calculation method for a command receiving cycle by the command receive interval calculating portion. DETAILED DESCRIPTION OF THE INVENTION

<Configuration of a stereoscopic image display system> Figure 1 shows a stereoscopic image system with an image display apparatus 100 configured to display stereoscopic images, and image vision glasses 150 that a viewer wears to view the stereoscopic images displayed by the image display apparatus 100.

A display portion 110 of the image display apparatus 100 is used to display images for the viewer. To display a stereoscopic image, images for the left and right eyes are alternately displayed on the time axis or switched at a predetermined interval.

A synchronizing signal transmitter 120 transmits synchronization signals in synchronization with the stereoscopic image displayed on the display portion 110 to the outside, in particular, to the image vision glasses 150. An exemplary case of The use of infrared rays to transmit / receive the synchronization signals is described below.

The image vision glasses 150 have a right eye optical filter 160, a left eye optical filter 170, and a synchronization signal receiver 180.30. The right eye optical filter 160 controls the incident light on the oei1 right of the viewer wearing the image vision glasses 150. More specifically, the right eye optical filter 160 adjusts or changes the amount or characteristics of the incident light on the right eye compared to the image displayed on The display portion 110 of the image display apparatus 100.

The left eye optical filter 170 controls the incident light on the left eye in the same manner as the right eye optical filter 160.

The synchronization signal receiver 180 receives timing signals from the synchronization signal transmitter 120 of the image display apparatus 100.

The image display system causes the aforementioned components to work together to display stereoscopic images for viewer viewing. The display portion 110 of the image display apparatus 100 may alternately display images for the left and right eyes, for example, at 120 Hz of frequency or switch them at a predetermined interval to show stereoscopic images. The timing signal transmitter 120 outputs sync signals in synchronization with the image switching for the left and right eyes displayed on the display portion 110. The image vision glasses 150 use the signal receiver synchronization 180 for receiving the synchronization signals, which are output from the synchronization signal transmitter 120 of the image display apparatus 100. If the synchronization signals are received, the image vision glasses 150 control the left and right eye optical filters 170, 160 on the basis of the received sync signals to adjust the amount or characteristics of the incident light on the left and right eyes of the viewer wearing the vision glasses. For example, if a synchronization signal, which indicates that an image for the left eye is displayed on the display portion 110 of the image display apparatus, is received, the image vision glasses 150 control the left eye optical filter 170 so as to increase the amount of light incident on the left eye. Meanwhile, the right eye optical filter 160 decreases the amount of light incident on the right eye. As a result, the viewer sees the image for the left eye, which is displayed on the display portion 110, with the left eye, not with the right eye. If a synchronization signal, which indicates that the display portion 110 displays an image for the right eye, is received, the left eye optical filter 170 decreases the amount of light incident on the left eye while the Right eye optical filter 160 increases the amount of incident light on the right eye. As a result, the image for the right eye displayed on the display portion 110 is seen with the right eye, not with the left eye.

If the images for the left and right eyes, which are displayed on the display portion 110, are different from a quantity of parallax of the viewer, the viewer recognizes the parallax between the images displayed on the display portion 110. As a result, the viewer can perceive the displayed images as stereoscopic although the display portion 110 is a substantially flat display device. <Hardware configuration of stereoscopic vision goggles> Figure 2 is a diagram illustrating a hardware configuration of the image vision goggles 150. As a hardware configuration, the image vision goggles 150 have a light receiving sensor infrared (IR sensor) 201, an amplifier 202, an LED 203, a CPU 204, a switch (SW) 205, a ROM 206, a RAM 207, a clock (CLK) 208, an analog switch 209, a shutter 210, an analog switch 211 and a shutter 212.

The IR sensor 201 is used to receive synchronization signals transmitted from the stereoscopic image display apparatus 100. The IR sensor 201 converts the received infrared rays into electrical signals. In the present embodiment, the timing signals are emitted in the form of infrared rays, but the present invention is not limited thereto. Another methodology, such as radio waves, can be used as long as the synchronization signals are transmitted wirelessly.

The amplifier 202 amplifies the electrical signals appropriately so that the electrical signals, which are outputted by the IR sensor 201, can be easily processed in the processing blocks of the following steps.

The LED 203 illuminates to inform a type of operation of the user when the stereoscopic image viewing glasses 150 are in operation or when the energy is delivered by setting the switch 205 to ON.

The CPU 204 controls the set of stereoscopic image viewing glasses 150. In the present embodiment, the example of the CPU is described, but a DSP, an FPGA or the like can be used as an alternative for performing similar processes.

The switch (SW) 205 is an interface for enabling external input into the stereoscopic image viewing glasses 150.

The ROM 206 stores programs that the CPU 204 rotates, operational parameters, default values, and the like. A rewritable flash memory can be used as the ROM 206.

The RAM 207 stores variable values or the like which are temporarily held while the CPU 204 runs the program. 2965693 _ 9 Clock (CLK) 208 cycles reference clocks to operate CPU 204 and other hardware components.

Analog switches 209, 211 implement an operating process to operate the shutters 210, 212 mentioned below. Two analog switches 209, 211 are required to operate the shutters 210, 212 for the left and right eyes, respectively.

The shutters 210, 212 in front of the left and right eyes of the viewer are switched in synchronization with the images displayed by the stereoscopic image display apparatus 100, respectively.

<Figure 3 is a diagram illustrating a functional configuration of the stereoscopic image viewing glasses 150. As a functional configuration, the stereoscopic image viewing glasses 150 have a receiver 301, an amplifying portion 302, an indicator 303, an operating portion 304, an input portion 305, a memory 306, a reference signal generator 307, an operating portion 308, a right eye filter 309, and an left eye filter 310.

The receiver 301 receives synchronization signals outputted from the stereoscopic image display apparatus 100. The receiver 301 corresponds to the IR sensor 201 in FIG. 2.

The amplifying portion 302 amplifies a signal received by the receiver 301. The amplifying portion 302 corresponds to the amplifier 202 in FIG.

The stereoscopic image viewing glasses 150 use the indicator 303 to indicate various types of information for the user. The indicator 303 corresponds to the LED 203 in Figure 2, but the indication methodology is not limited to one LED. Any other methodology can be used if it gives information to the user. The operational portion 304 controls all the stereoscopic image viewing glasses 150. The operational portion 304 corresponds to the CPU 204 in FIG. 2.

Input portion 305 accepts various instructions from the user. Input portion 305 corresponds to switch 205 in Figure 2.

The memory 306 stores permanently or temporarily various types of information. The memory 306 corresponds to the ROM 206 and the RAM 207 in FIG. 2.

The reference signal generator 307 generates reference signals whose operational portion 304, for example, needs for its operation. The reference signal generator 307 corresponds to the clock 208 in FIG. 2.

The operating portion 308 generates and outputs signals to operate the shutters mentioned below for left and right eye filters 309, 310, for example. The operating portion 308 corresponds to the analog switches 209, 211 in Figure 2.

The left and right eye filters 309, 310 control the amount of light incident on the left and right eyes of the viewer. The left and right eye filters 309, 310 correspond to the shutters 210, 212 in Figure 2.

The operational portion 304 further includes an input switch 311, a command receive interval calculation portion 312, a command receive period controller 313, and a filter controller 314.

The input switch 311 determines whether the operational part 304 accepts the synchronization signals, which are input from the receiver 301 and the amplification part 302. The input switch 311 corresponds to the validity / invalidity of a input port of the CPU 204 in Figure 2, for example.

The command receive interval calculating portion 312 calculates reception cycles of various signals received by the receiver 301, for example. The method of calculating the reception cycle will be described later.

The command reception period controller 313 determines a period during which reception of an external signal (for example a command) is accepted and another period during which it is not accepted on the basis of the reception cycles of the various signals, which are calculated by the command receive interval calculation portion 312. The command receive period controller 313 accepts and transmits the received external signals to the filter controller 314 mentioned below by controlling the command switch. input 311 only during the determined reception period.

The filter controller 314 controls the open / close orientation of the left and right eye filters 309, 310 through the filter operating portion 308 based on the received external signal.

The correspondence of the functional configuration in FIG. 3 with the hardware configuration in FIG. 2 described in this embodiment is an example, and the present invention is not limited to this correspondence.

<Calculation of the Cycle of Received Control Signals> Figure 4 shows received signal reception times. Section (a-1) of Figure 4 shows the open / closed orientations of the right eye filter 309. A period during which the signal is higher means that the filter is open (the amount of light transmitted becomes larger) . A period during which the signal is lower means that the filter is closed (the amount of light transmitted becomes smaller). Section (a-2) of Figure 4 shows the open / closed orientations of the left eye filter 310. As for Section (a-1) of Figure 4, a period during which the signal is higher means that the filter is open and also a period during which the signal is lower means that the filter is closed.

Section (b) of FIG. 4 shows the reception times of signals received by the receiver 301. The first signal (first command) is interpreted as the opening of the right eye filter 309. The second signal (second command) is interpreted as closing the right eye filter 309. The third signal (third command) is interpreted as opening the left eye filter 310. The fourth signal (fourth command) is interpreted as closing the filter. left eye 310.

If the first to the fourth commands shown in Section (b) of Figure 4 are received, the command receive slot calculation portion 312 computes the control cycles based on the timing of receipt of these commands, respectively . In particular, if the receptions of the first, second, third, and fourth commands are considered a receive cycle, the command receive interval calculation portion 312 receives several cycles of these commands. According to the present embodiment, the command receive interval calculating portion 312 receives N cycles of these commands.

The command receive slot calculation portion 312 calculates a cycle for each type of command. In the example in Section (b) of Figure 4, the first command is received by the receiver 301 at intervals T11, T12 and T13. The command receive interval calculating portion 312 can calculate an average of these values to calculate the first command receive cycle (T1). In the case of Section (b) of Figure 4, the first command reception cycle (Tl) is: Tl = (T11 + T12 + T13) / 3

The second order receiving cycle (T2), the third order receiving cycle (T3) and the fourth order receiving cycle (T4) also can be determined as follows, on the basis of Sections (c-1). ), (c-2) and (c-3) of Figure 4, respectively.

T2 = (T21 + T22 + T23) / 3 T3 = (T31 + T32 + T33) / 3 T4 = (T41 + T42 + T43) / 3

In the present embodiment, the first to fourth command reception cycles are calculated as averages of the reception intervals of the N cycles of the received signals, but the present invention is not limited thereto. Other possible methodologies include the use of a median value, or the use of an average of values excluding the minimum value and the maximum value. In other words, any calculation methodology can be used if a representative reception interval can be calculated based on the received signal reception intervals.

The command receive slot calculating portion 312 may calculate the next receive instant of each command based on the calculated receive interval for the corresponding command and the last received time of the corresponding command. The command receive interval calculation portion 312 can store the calculated receive cycle for each command in the memory 306.

Fig. 8 is a flowchart illustrating a calculation flow process by the command receive interval calculating portion 312 for the receive cycle of each command.

(Step 5801) The command receipt interval calculating portion 312 begins receiving commands.

(Step 5802) The command receive slot calculation portion 312 determines whether it has finished receiving N command receive cycles. Unless it has finished receiving N command receive cycles, the command receive slot calculation portion 312 returns to the command of step 5801. If it has finished receiving the N command receive cycles, the command receive interval calculating portion 312 proceeds to the command of step 5803.

(Step 5803) The command receive slot calculation portion 312 calculates the receive cycle for each command based on the received command receive times in the N receive cycles.

(Step 5804) The command receive slot calculation portion 312 determines the receive cycle representative of each command based on the calculated receive period of each command.

The command receive interval calculating portion 312 may obtain the receive cycle of each command by the above-mentioned method.

It is not necessary for the command receive interval calculating portion 312 to set the cycle of each command to the determined cycle. The cycle can be updated each time the command is received. In this case, a weighted average between the previously calculated average value of the command receiving intervals and the current command interval can be calculated and considered as a new command receiving interval. Then, the stereoscopic vision glasses 150 can follow the change of the control cycle each time the display cycle is changed for each scene on the side of the stereoscopic image display apparatus.

<Setting the Command Receiving Period> The command receive period controller 313 controls the filter controller 314 based on the receive interval of each command and the last time of the corresponding command, for example, which are calculated by the command receive interval calculating portion 312 and stored in the memory 306.

The right and left eye filters 309, 310 of the stereoscopic image vision goggles 150 are basically controlled between the open / closed orientations in synchronization with the left and right images displayed by the image display apparatus. 100. If the cycle of the left and right stereoscopic images displayed by the stereoscopic image display apparatus 100 is consistent, for example, in the case of the 120 Hz display of the respective images, the right eye filters and left 309, 310 also follow such a cycle.

If the cycle of commands transmitted by the stereoscopic image display apparatus 100 is coherent, the command reception period controller 313 can estimate a timing of receipt of the command in advance according to the calculated cycle for each command by the command receive interval calculation portion 312. Thus, the command receive period controller 313 only sets the input switch 311 as active in a period to receive commands, so as to accept and transmit signals, which are input from the receiver 301 and the amplification part 302, in the operational part 304. During a period in which it is expected that there is no reception of the commands, the command receive period controller 313 sets the input switch 311 as inactive, so as to stop the input of external signals in the operational part 304.

Section (b) of Figure 5 shows the control of the input switch 311 by the command receive period controller 313 on the basis of commands from the stereoscopic image display apparatus shown on the section ( a) of Figure 5. In Section (b) of Figure 5, the higher level indicates that the input switch 311 is active. In Section (b) of Figure 5, the lower level indicates that the input switch 311 is inactive.

For the first and fourth commands, the command receive period controller 313 makes the input switch 311 active on the basis of each command cycle calculated by the command receive interval calculation portion 312 (Section ( b) of Figure 5). The command receive period controller 313 makes the input switch 311 active in advance, slightly earlier than the expected reception time of the command. Over a predetermined period from this point, which is D1 in the case of the first command in Section (b) of Figure 5, the input switch 311 becomes active. Then, even if the moment of transmission of the first command by the stereoscopic image display apparatus is slightly ahead or late within the reception period D1, the stereoscopic image viewing glasses 150 can receive the first order. If the receive period D1 has elapsed, the command receive period controller 313 makes the input switch 311 inactive. The command receive period controller 313 repeats this process for the first command at each cycle T1. For the fourth control also, the command receive period controller 313 makes the input switch 311 active slightly earlier, and controls to keep the mode active only during the period D4 at each cycle T4.

For the second and third commands, the command receive period controller 313 executes processes different from those of the first and fourth commands. In these cases, the command receive period controller 313 receives the second and third commands within the same receive period D2, which depends on a relationship between the receive interval and the receive instant of each command, which are calculated by the command receipt interval calculating portion 312. In other words, if the period of receipt of the second command upon receipt of the third command is shorter than a predetermined duration , the command receive period controller 313 controls the input switch 311 so that it is always active to receive both commands, so that the receptions are completed within a period.

Thus, it is less likely that the third command is transmitted by the stereoscopic image display apparatus 100 during the idle period of the input switch 311, and thus it is less likely that the operational part 304 fails to accept the received signal.

It is not always necessary for the command receive period controller to set the command receive period as mentioned above. The aforementioned method may be implemented only if it is highly expected that a command is received from the stereoscopic image display apparatus 100.

Therefore, if the stereoscopic image viewing glasses 150 are in the initialization mode immediately after starting or before the complete reception of N command receiving cycles (Figure 6), the command receiving period controller 313 can keep the input switch 311 in the active mode.

If a command is not received in its expected reception period (FIG. 7), the command receive period controller 313 can keep the input switch 311 in the active mode in subsequent processes.

Section (b) of Figure 7 is a failure mode in which there is no receipt of the last expected second and third commands, where the command receive period controller 313 holds the input switch 311 active at from the next order receipt period.

Section (c) of Figure 7 shows another methodology. This is a failure mode in which there is no receipt of the last second and third expected commands, where the input switch 311 is kept active until a command is subsequently received.

As described above, according to the present embodiment, the input switch is only controlled during the period when a command is expected to be received, in order to enter the command into the operational part 304 During a period other than the command receiving period, the operational part 304 receives no signal. Thus, the stereoscopic image viewing glasses 150 may be less susceptible to noise reception, so that noise is less likely to disturb the control.

The operational part 304 (input switch 311, command receive interval calculation portion 312, command receive period controller 313 and filter controller 314) described in the present embodiment can be implemented as a software program of the CPU 204 shown in Figure 2, or can be implemented as a configuration

hardware, such as an FPGA. The above-mentioned embodiment is essentially the following configuration.

Stereoscopic image vision goggles according to an aspect of the above-mentioned embodiment have: an input switch configured to control input validity / invalidity of commands received from outside; a part of calculating intervals of

command receipt configured to calculate a cycle of each of the commands based on commands received from outside; a command receive period controller configured to determine a receive period of a next command based on the command cycle;

each of the controls and set the input switch as active during the period; and a filter controller configured to control a left eye filter and a right eye filter that adjust an amount of incident light to the left and right eyes of a viewer,

the base of commands received from the outside while the command receive period controller sets the input switch as active. Stereoscopic vision glasses. 30 accept commands as long as there are receptions of external commands, so that noises are less likely to be received. Therefore, it is less likely that the control of stereoscopic vision glasses is disturbed.

In the above configuration, it is preferable that the command receive period controller sets the input switch as inactive when the command receive period controller determines that there is no reception of the external commands .

According to the above configuration, it becomes less likely that the noises disturb the control of the stereoscopic vision glasses.

In the above configuration, it is preferable that if a command and a subsequent command are received within a predetermined period, the command receive period controller determines the receive period of the first command as being the same. than that of the next order.

According to the above configuration, it becomes less likely that signal reception failures will occur.

Industrial Applicability The invention of the present application can be used for stereoscopic image vision goggles to control the opening and closing of shutters (filters) on the basis of signals from the display apparatus. stereoscopic images.

Claims (3)

REVENDICATIONS1. A stereoscopic image viewing goggle, comprising: an input switch configured to control input validity / invalidity of commands received from outside; a command receive interval calculating portion configured to calculate a cycle of each of the commands based on commands received from outside; a command receive period controller configured to determine a receive period of a next command based on the cycle of each of the commands and set the input switch as active during the period; and a filter controller configured to control a left eye filter and a right eye filter that adjusts an amount of incident light to the left and right eyes of a viewer, based on commands received from outside while the command receive period controller sets the input switch as active. The stereoscopic image viewing glasses according to claim 1, wherein the command receive period controller sets the input switch as inactive when the command receive period controller determines that there is no receipt of external orders. 2965693 _ 25 The stereoscopic image viewing glasses according to claim 1, wherein, if a command and a subsequent command are received within a predetermined period, the command receive period controller determines the reception period of the command. first command as the same as the next command.