TW201322738A - Adjustment device for shutter release timing and adjustment method thereof - Google Patents

Abstract

The present invention discloses an adjustment device for shutter release timing and an adjustment method thereof. The adjustment device for shutter release timing applied for three-dimensional glasses comprises a receiving module and a processing module. The receiving module receives a first timing signal transmitted by an image apparatus. The processing module compares a period of the first timing signal and a period of a second timing signal of the three-dimensional glasses to get an offset; based on the offset, the processing module successively synchronizes the period of the second timing signal with the period of the first timing signal with an amount less or equal to a predetermined amount.

Description

Shutter switch timing adjustment device and adjustment method thereof

The present invention relates to a shutter switch timing adjustment device and an adjustment method thereof, and more particularly to a shutter switch timing adjustment device capable of effectively eliminating stereo lens shutter flicker and an adjustment method thereof.

The general principles of 3D stereo glasses are divided into three types. The main reason is that the two eyes receive different images, and the brain combines the data on both sides to create a three-dimensional effect. Earlier chromatic aberration glasses appear, usually red on one side and blue or green on the other, with other colors. Then, polarized glasses use the principle of polarization, and the two lenses filter out unsuitable light, allowing the image to be transmitted to the correct eye. In addition, the liquid crystal shutter glasses utilize a visual persistence mode, and the left and right lenses interactively block the left and right eyeballs by electronically controlling the liquid crystal. Similarly, displaying the originals requires interactively switching left and right eye images.

The current 3D stereo glasses are mainly divided into two categories: passive stereo glasses and active stereo glasses. When the user is viewing the stereoscopic image, the device that displays the image will send a synchronization signal for switching the left and right images, and the active stereo glasses will switch the left and right shutters according to the signals. However, the communication between the device displaying the image and the glasses may be interrupted due to other signal interference or weak signals. In order to solve this problem, it is necessary to generate a timing corresponding to the synchronization signal in the processing module (for example, the Microcontroller Unit, MCU), so that the switching of the stereo glasses shutter can be continued according to the timing when the signal is interrupted.

Some lighting fixtures (such as fluorescent lamps) vary in light and dark with the frequency of the alternating current, as shown in Figure 1. Taking 60 Hz AC as an example, the fluorescent lamp will make a bright change at 120 Hz. Under normal circumstances, the human eye cannot detect it. However, if there is a situation in which synchronization is not achieved during the viewing, the synchronization time of the image and the stereo glasses will gradually shift after a period of time. Please refer to Figure 2 further. As shown in the figure, assume that the correct left shutter opening time is point A. When the synchronization time offset occurs, the current left shutter opening time is point B. If the synchronization signal is received, directly shift the B point to point A, which will cause the brightness difference of the fluorescent lamp to be too large between the two shutters to open, and the user will obviously feel the blinking of the shutter.

Therefore, in terms of demand, designing a shutter switch timing adjustment device that can effectively eliminate the blinking of the stereo glasses shutter and its adjustment method have become an urgent issue in the market application.

In view of the above-mentioned problems of the prior art, the object of the present invention is to provide a shutter switch timing adjustment device and an adjustment method thereof, so as to solve the current timing adjustment between the shutter glasses due to the shutter opening, resulting in poor viewing quality of the stereoscopic image. The problem.

According to the purpose of the present invention, a shutter switch timing adjustment device is provided, which is applicable to a stereoscopic glasses, and includes a receiving unit and a processing module. The receiving unit receives a first timing signal sent by an image device. The processing module compares the period of the first timing signal with the period of one of the second timing signals of the stereo glasses to generate an offset, and the processing module does not exceed a preset value. The size, according to the offset, gradually synchronizes the period of the second timing signal to the period of the first timing signal.

According to the purpose of the present invention, a shutter switch timing adjustment method is further applied to a stereo glasses, which includes a receiving unit and a processing module. The shutter switch timing adjustment method includes the following steps: receiving an image device Transmitting a first timing signal; comparing a period of the first timing signal with a period of a second timing signal of the stereo glasses to generate an offset; and not exceeding a preset value The size of the second timing signal is gradually synchronized to the period of the first timing signal according to the offset.

Preferably, the processing module gradually synchronizes the period of the second timing signal to the period of the first timing signal according to the preset value.

Preferably, the stereo glasses further comprise a timer, the timer having the second timing signal, and the processing module performs switching of the stereo glasses shutter according to the period of the second timing signal of the timer.

According to the above, the shutter switch timing adjusting device and the adjusting method thereof according to the present invention can have the following advantages:

The shutter switch timing adjustment device and the adjustment method thereof can gradually adjust the timing of the shutter switch in response to changes in the ambient light source to avoid flickering when the shutter is switched. In addition, the image quality of the user using the active stereo glasses is improved.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and description. It is not intended to be a true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be interpreted or limited. First described.

Please refer to FIG. 3, which is a block diagram of an embodiment of a shutter switch timing adjustment device of the present invention. As shown in the figure, the shutter switch timing adjustment device 1 of the present invention is applicable to a stereoscopic glasses, and may include a receiving unit 10, a timer 11, and a processing module 12. The shutter of the stereo glasses preferably can be matched with a liquid crystal (Liquid Crystal), and is shielded by controlling the transmittance: that is, when the transmittance of the liquid crystal is relatively transparent, that is, generally in actual implementation. Said to open; conversely, when the transparency of the liquid crystal is relatively opaque, that is, generally said in the actual implementation of the closure.

When the stereo glasses are initially operated, the receiving unit 10 can receive a first timing signal 201 sent by the signal transmitting unit 20 in an external imaging device 2; in this embodiment, the first timing signal 201 can be Infrared sync signal from the 2nd end of the external imaging device. The processing module can be electrically connected to the receiving unit 10 and the timer 11, which can include a Micro-Processing Unit or a Central Processing Unit (CPU). After the receiving unit 10 receives the first timing signal 201, the processing module 12 can transmit the first timing signal 201 received by the receiving unit 10 to the timer 11, and cause the second timing signal 111 in the timer 11. The period is set to be the same as the period of the first timing signal 201. As such, the processing module 12 can control the timer 11 to switch the shutter of the stereo glasses.

In response to the above requirements, the receiving unit 10 can receive the first timing signal 201 sent by the signal transmitting unit 20 in the external imaging device 2 every predetermined time. The processing module 12 can synchronize the period of the second timing signal 111 of the timer 11 to the period of the first timing signal 201, and control the timer 11 to switch the shutter of the stereo glasses. However, if the communication channel is blocked, that is, the receiving unit 10 does not receive the first timing signal 201 sent by the signal transmitting unit 20 in the external imaging device 2, at this time, the processing module 12 can be The period of the second timing signal 111 of the timer 11 is used to switch the stereo glasses shutter.

Then, when the receiving unit 10 receives the first timing signal 201 sent by the external image device 2, the processing module 12 can set the period of the first timing signal 201 to the second timing signal 111 of the timer 11. The period is compared to generate an offset correspondingly; and the processing module 12 can not exceed a preset value, and the period of the second timing signal 111 is gradually synchronized to the first timing signal according to the offset. The period of 201.

Incidentally, the first timing signal 201 and the second timing signal 111 both include the left shutter switch timing of the stereo glasses and the right shutter switch timing. It should be apparent to those skilled in the art to which the present invention pertains, and those skilled in the art can arbitrarily combine the above-mentioned functional modules to form an integrated module, or split into individual functional detail units, and look at the design convenience. set.

Please refer to FIG. 4, which is a flowchart of an embodiment of a method for adjusting the timing of the shutter switch of the present invention. As shown, the shutter switch timing adjustment method can be used to optimize the switching timing of the 3D stereo glasses shutter. The method of adjusting the shutter switch time includes the following steps. Step 41: Receive a synchronization signal sent by the image device. In actual implementation, the first timing signal sent by the signal transmitting unit in the external imaging device can be received by the receiving unit as described above. Step 42: Set the period of the timing signal in the timer to be the same as the period of the synchronization signal. Step 43: Switch the stereo glasses shutter with a timer. Moreover, in step 44, a determination is made as to whether the synchronization signal is interrupted: if not, step 43 is performed; if yes, step 45 is performed. At step 45: the stereo glasses shutter is switched using a timer.

Next, step 46: confirm whether the synchronization signal is restored: if not, proceed to step 45; if yes, proceed to step 47. At step 47, the synchronization signal sent by the image device is received. Step 48: Compare the period of the synchronization signal with the period of the timing signal in the timer.

The above steps are explained in detail. In actual implementation, the interruption of the synchronization signal may be that the communication channel is temporarily blocked, so that the receiving unit temporarily cannot receive the first timing signal sent by the external imaging device; or In terms of power saving, the stereo glasses may turn on the receiving unit to receive the timing signal every predetermined time. For example, every 500 milliseconds (ms), the receiving unit will receive the timing signal. When the receiving unit receives the synchronization signal from the external image device again, the period of the timing signal in the timer may be different from the synchronization signal for a period of time (please refer to FIG. 2).

At this time, the processing module can compare the period of the synchronization signal with the period of the timing signal in the timer to generate an offset correspondingly. Next, at step 49: it is determined whether the offset is greater than the maximum allowable adjustment value: if yes, step 50 is performed. In step 50, the maximum allowable adjustment value is deducted from the start time of the timing signal in the original timer, which is the start time of the updated timing signal in the timer. In practice, the maximum allowable adjustment value can be set to 100 microseconds (μs) or 50 microseconds depending on the actual demand; if the offset is 300 microseconds, it represents the timing within the original timer. The start time of the signal is shifted forward/backward by 300 microseconds. At this time, the start time of the new timing signal in the timer can be correspondingly corrected forward/backward by 100 microseconds or 50 microseconds. demand. After the calibration is completed, the process returns to step 47 again, and the iteration is repeated until the timing signal in the timer is synchronized with the synchronization signal received by the receiving unit. In addition, if the offset is less than or equal to the maximum allowable adjustment value, step 51 is performed. Step 51: The offset time of the start time of the timing signal in the original timer is the start time of the updated timing signal in the timer.

It should be noted that those skilled in the art to which the present invention pertains should be aware that the implementation manners of the time interval, the maximum allowable adjustment value, and the offset of the receiving unit for timing signal reception are merely examples and not Limitations, any spirit and scope that does not deviate from the timing adjustment method of the shutter switch, should be included in the spirit of the present invention and will be described herein first.

Please refer to FIG. 5, which is a schematic diagram of shutter timing adjustment according to an embodiment of the present invention. As shown, it indicates left image LI, right image RI, left shutter open LO, right shutter open RO, correct shutter switch timing CST, offset shutter switch timing SST, first correction shutter switch timing 1ST Second correction shutter switch timing 2ST, third correction shutter switch timing 3ST, ambient light source brightness EL, correct left shutter open time point A, offset left shutter open time point B, successively corrected left shutter open time Point B1, B2, B3, and B, B1 change the ambient light source G' between the two corrections.

When the offset left shutter opening time point B is too far from the correct left shutter opening time point A, the processing module will adopt a stepwise adjustment method, for example, adjusting the interval by 50 microseconds or 100 microseconds each time. In this embodiment, for example, the offset left shutter opening time point B and the correct left shutter opening time point A time are 130 microseconds apart, and the processing module can adjust for one unit in 50 microseconds, from B to B1. From B1 to B2, the remaining 30 microseconds are finally adjusted from B2 to B3. That is to say, from B1, B2, B3, ... gradually approaching point A. Since the time point of each shutter change is reduced, the change of the ambient light source will also be reduced; thus, the user will not perceive the shutter flicker.

In summary, the shutter switch timing adjustment device and the adjustment method thereof according to the present invention can optimize the switching timing of the 3D stereo glasses shutter according to the change of the ambient light source, that is, gradually adjust the timing of the shutter switch to avoid shutter switching. Causes flicker. The user can not perceive the flicker of the shutter, thereby improving the image viewing quality of the user using the active stereo glasses.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1. . . Shutter switch timing adjustment device

2. . . External imaging equipment

10. . . Receiving unit

11. . . Timer

111. . . Second timing signal

12. . . Processing module

20. . . Signal transmitting unit

201. . . First timing signal

LI. . . Left image

RI. . . Right image

LO. . . Left shutter open

RO. . . Right shutter open

CST. . . Correct shutter switch timing

SST. . . Offset shutter switch timing

1ST. . . Correct the shutter switch timing for the first time

2ST. . . Second correction of shutter switch timing

3ST. . . Third correction of shutter switch timing

EL. . . Ambient light source brightness

A. . . Correct left shutter opening time point

B. . . Offset left shutter opening time point

B1, B2, B3. . . The left shutter opening time point that is corrected one by one

G’. . . Changes in ambient light source between B and B1 two corrections

41~51. . . Step flow

Figure 1 is a timing diagram showing the relationship between the AC voltage and the brightness of the fluorescent lamp.

Figure 2 is a timing diagram showing the cause of the blinking of the stereo glasses shutter.

Fig. 3 is a block diagram showing an embodiment of a shutter switch timing adjusting device of the present invention.

Fig. 4 is a flow chart showing an embodiment of the method for adjusting the timing of the shutter switch of the present invention.

Figure 5 is a schematic diagram of shutter timing adjustment according to an embodiment of the present invention.

41~51. . . Step flow

Claims (14)

A shutter switch timing adjustment device is applicable to a stereoscopic glasses, comprising: a receiving unit that receives a first timing signal sent by an image device; and a processing module that is the first timing signal The period is compared with a period of the second timing signal of the stereo glasses to generate an offset corresponding to the size of the preset value, and the step is gradually determined according to the offset. The period of the two timing signals is synchronized to the period of the first timing signal. The shutter switch timing adjustment device of claim 1, wherein the receiving unit receives the first timing signal transmitted by the image device every preset time. The shutter switch timing adjustment device according to claim 1, wherein if the receiving unit does not receive the first timing signal transmitted by the image device, the processing module performs the cycle according to the second timing signal. The switch of the stereo glasses shutter. The shutter switch timing adjustment device of claim 1, wherein the processing module gradually synchronizes the period of the second timing signal to the period of the first timing signal according to the preset value. . The shutter switch timing adjustment device according to claim 1, wherein if the offset is less than or equal to the preset value, the processing module directly determines the period of the second timing signal according to the offset. Synchronization to the period of the first timing signal. The shutter switch timing adjustment device of claim 1, further comprising a timer, wherein the timer has the second timing signal, and the processing module is configured according to the period of the second timing signal of the timer , the switch of the stereo glasses shutter is performed. The shutter switch timing adjustment device of claim 1, wherein the first timing signal and the second timing signal both include a left shutter switch timing and a right shutter switch timing of the stereo glasses. A shutter switch timing adjustment method is applicable to a stereoscopic glasses, the stereo glasses includes a receiving unit and a processing module, and the shutter switch timing adjustment method comprises the following steps: receiving a first timing signal sent by an image device Comparing the period of the first timing signal with a period of one of the second timing signals of the stereo glasses to generate an offset; and not exceeding a preset value, according to the offset The period of the second timing signal is gradually synchronized to the period of the first timing signal. The method for adjusting a shutter switch timing according to claim 8 further includes the following steps: receiving, by the receiving unit, the first timing signal transmitted by the image device by using a preset time interval. The method for adjusting a shutter switch timing according to claim 8 further includes the following steps: when the receiving unit does not receive the first timing signal transmitted by the image device, the processing module is configured according to the second timing signal The cycle of the stereo glasses shutter is performed. The method for adjusting the timing of the shutter switch according to claim 8 further includes the step of: gradually synchronizing the period of the second timing signal to the period of the first timing signal by using the preset value. The method for adjusting a shutter switch timing according to claim 8 further includes the following steps: when the offset is less than or equal to the preset value, the processing module directly determines the second according to the offset. The period of the timing signal is synchronized to the period of the first timing signal. The method of adjusting the shutter switch timing according to the eighth aspect of the invention, wherein the stereo glasses further comprises a timer, the timer having the second timing signal, and the processing module is configured according to the second timing of the timer During the period of the signal, the shutter of the stereo glasses is switched. The shutter switch timing adjustment method of claim 8, wherein the first timing signal and the second timing signal both include a left shutter switch timing and a right shutter switch timing of the stereo glasses.