KR20120070674A - Method for adjusting duty ratio of liquid crystal shutter glasses using infrared light signal - Google Patents
Method for adjusting duty ratio of liquid crystal shutter glasses using infrared light signal Download PDFInfo
- Publication number
- KR20120070674A KR20120070674A KR1020100132091A KR20100132091A KR20120070674A KR 20120070674 A KR20120070674 A KR 20120070674A KR 1020100132091 A KR1020100132091 A KR 1020100132091A KR 20100132091 A KR20100132091 A KR 20100132091A KR 20120070674 A KR20120070674 A KR 20120070674A
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- KR
- South Korea
- Prior art keywords
- liquid crystal
- signal
- shutter glasses
- duty ratio
- crystal shutter
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/398—Synchronisation thereof; Control thereof
Abstract
Description
The present invention relates to a method for adjusting the duty ratio of the liquid crystal shutter glasses, and relates to a method for adjusting the duty ratio of the liquid crystal shutter glasses using an infrared signal of a carrier type which can adjust the brightness of the liquid crystal shutter glasses according to the brightness of the screen of the stereoscopic imaging apparatus. will be.
In general, a stereoscopic image display apparatus is an apparatus for displaying an image signal through a digital sampling and a series of signal processing of the image signal transmitted from the video card.
In the stereoscopic image display apparatus, a scanning method of an image signal is largely classified into a progressive scanning method, an interlaced scanning method, and an interlaced scanning method.
In the sequential scanning method, an image of one frame is composed of one field image, whereas in the interlaced scanning method, an image of one frame is usually composed of two field images.
On the other hand, three-dimensional stereoscopic imaging technology is generally to make the three-dimensional sense of the object by using the binocular parallax (binocular parallax) that is the biggest factor to recognize the three-dimensional sense in the near.
As a method of viewing a stereoscopic image, a 3D glasses are typically worn.
The method of wearing the 3D glasses is an anaglyph method using blue and red sunglasses, and a polarization method using polarized glasses having different polarization directions, and a time-divided screen is periodically repeated. And a liquid crystal shutter glasses type (or time division method) using glasses provided with a liquid crystal shutter synchronized with the synchronous shutter.
Here, the method of watching a stereoscopic image using the liquid crystal shutter glasses is a method of allowing a user to feel a stereoscopic feeling by repeatedly turning on and off driving of left and right liquid crystals.
The three-dimensional image display device and the liquid crystal shutter glasses communicate with each other by an infrared (IR) communication method, and the non-carrier communication that directly transmits operation data for driving (open or closed) of the left and right liquid crystals of the liquid crystal shutter glasses. And a carrier communication method for transmitting a synchronization signal for controlling the operation of the left and right liquid crystals.
By the way, in the conventional liquid crystal shutter glasses driving method by a carrier method that transmits a synchronization signal for controlling the operation of the left and right eye liquid crystals, only the left and right eye liquid crystal driving is controlled, but the duty value of the liquid crystal cannot be adjusted. .
Therefore, there is a problem that the brightness of the liquid crystal shutter glasses cannot be adjusted according to the screen brightness mode of the stereoscopic image display device.
In addition, depending on the type of the 3D image display device, the time duration of the afterimage effect due to the on / off of the screen is different, but there is a problem in that crosstalk due to the afterimage effect cannot be prevented.
The present invention has been made to solve the above problems, an object of the present invention is to transmit the synchronization signal for controlling the operation of the left and right liquid crystal using an infrared signal, and at the same time can adjust the duty ratio of the left and right liquid crystal. It is to provide a method for adjusting the duty ratio of the liquid crystal shutter glasses using an infrared signal.
It is still another object of the present invention to provide a method for adjusting the duty ratio of liquid crystal shutter glasses using an infrared signal capable of adjusting the brightness of the liquid crystal shutter glasses according to the screen brightness mode of the stereoscopic image display device.
It is still another object of the present invention to provide a method for adjusting the duty ratio of liquid crystal shutter glasses using an infrared signal capable of adjusting crosstalk according to the type of a stereoscopic image display device.
In the duty ratio adjustment method of the liquid crystal shutter glasses using the infrared signal according to the present invention for achieving the above object, the left and right eye liquid crystal by adjusting the width of the synchronization signal while transmitting a synchronization signal for controlling the operation of the liquid crystal It characterized in that to adjust the duty ratio of.
Here, the synchronization signal may be configured as an on aggregation region of a plurality of time-divided infrared signals.
Preferably, the off time of the liquid crystal becomes longer when the width of the synchronization signal is larger than the width of the reference signal.
In addition, when the width of the synchronization signal is smaller than the width of the reference signal is configured to shorten the off (Off) time of the liquid crystal.
On the other hand, when the screen of the stereoscopic image display device that transmits the infrared signal to the liquid crystal shutter glasses is brighter than the reference screen brightness, the width of the synchronization signal may be configured to be larger than the width of the reference signal.
According to the present invention, the duty ratio of the left and right eye liquid crystals can be adjusted while transmitting a synchronization signal for controlling the operation of the left and right eye liquid crystals using an infrared signal.
In addition, the brightness of the liquid crystal shutter glasses may be adjusted according to the screen brightness mode of the stereoscopic image display device.
In addition, it is possible to adjust the crosstalk due to the afterimage effect that varies depending on the type of the 3D image display device.
1 is a diagram illustrating a case where the duty ratio of the liquid crystal shutter glasses is 100%.
2 is a diagram illustrating a case where the duty ratio of the liquid crystal shutter glasses is adjusted by (T3-T1).
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
Prior to this, the terms used in the specification and claims should not be construed in a dictionary sense, and the inventor may, on the principle that the concept of a term can be properly defined in order to explain its invention in the best way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.
Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.
FIG. 1 is a diagram illustrating a case where the duty ratio of the liquid crystal shutter glasses is 100%, and FIG. 2 is a diagram illustrating a case where the duty ratio of the liquid crystal shutter glasses is adjusted by (T3-T1).
1 to 2, in the duty ratio adjusting method of the liquid crystal shutter glasses using the infrared signal according to the present invention, the synchronization signal while transmitting the synchronization signals (T1, T3) for controlling the operation of the left and right liquid crystals. It is characterized by adjusting the duty ratio of the left and right liquid crystal by adjusting the width of.
The duty ratio adjustment method of the liquid crystal shutter glasses using the infrared signal according to the present invention is a method of driving the liquid crystal shutter glasses to transmit a signal from a stereoscopic image display device so that the three-dimensional stereoscopic image is visible. The display device transmits a synchronization signal for driving the liquid crystal of the liquid crystal shutter glasses in infrared (IR) communication.
The liquid crystal shutter glasses for receiving the synchronization signal includes a receiver for receiving the synchronization signal and a controller for controlling liquid crystal driving of left and right eyes of the liquid crystal shutter glasses according to the received synchronization signal.
The receiver receives a synchronization signal transmitted from the stereoscopic image display device and delivers the synchronization signal to the controller.
In addition, the control unit is supplied with power from the voltage supply unit, and processes the image output from the stereoscopic image display device so that the image of the different view on the left and right liquid crystal of the liquid crystal shutter glasses, the left, right eye liquid crystal It controls the operation of driving (open or closed) of.
The synchronization signal is a driving signal for controlling the operation of the left and right liquid crystals, and the synchronization signal includes data on the left and right liquid crystal control transmitted from the stereoscopic image display device and the left and right eye liquid crystals are controlled by the synchronization signal. The drive is controlled.
As shown in FIG. 1, the liquid crystal display transmits a synchronization signal T1 for controlling the operation of left and right liquid crystals, and a signal relating to a duty ratio T3-T1 at the second half of the synchronization signal T1. ) To transmit.
The synchronization signal consists of a time-divided infrared signal with a frequency of 20.7 Kz, for example.
That is, as shown in FIG. 1, when the infrared signal is turned on three times during the reference time T1, a signal section of T1 ′ is generated in the infrared signal receiver on the eyeglass side during the three time domains turned on as described above. The left and right liquid crystals are turned on / off for a reference time (100%) corresponding to the T1 ′ signal period.
Here, although the infrared signal is intermittently turned on three times during the reference time T1, the glasses-side infrared signal receiver generates a signal section corresponding to the time domain in which the infrared signal is turned on three times, and the liquid crystal is used as one synchronization signal. Drive.
Meanwhile, as shown in FIG. 2, when the time-divided infrared signal is turned on six times by adding the time of (T3-T1) to the T1 time, it corresponds to the entire six-time turned on time (T3). The signal section of T3 'is generated in the infrared signal receiver on the glasses side, and the liquid crystal off time is increased by the time of (T3-T1) to the reference time (100%), and the off time of the right liquid crystal is also the reference time ( 100%) by (T3-T1).
As a result, the open time of the entire left and right liquid crystals is reduced by (T3-T1) from the reference time (100%), so that when the screen of the 3D image display device is brighter than the reference screen, By increasing the liquid crystal off time by (T3-T1), the viewer can make the bright screen appear somewhat darker.
In addition, depending on the type of the 3D image display device, the time after which an afterimage remains on the screen is different even when the screen is turned off. As described above, the liquid crystal off time is extended by (T3-T1) rather than the reference time T1 to view through the left and right liquid crystals. Crosstalk of the screen can be prevented.
On the contrary, when the infrared signal is turned on 3 times less than the reference time T1, that is, when the infrared signal is turned on twice, a short signal area section is generated in the infrared signal receiving unit corresponding to the corresponding length, and the signal becomes shorter than the reference time T1. The off time of the liquid crystal may be reduced (the on time becomes long) by the size of the region section.
Thus, by adjusting the off time of the liquid crystal according to the type of the 3D image display device, not only the brightness of the screen is visible to the viewer can be adjusted, but also the crosstalk phenomenon of the screen overlapping the left and right eyes can be prevented.
As mentioned above, although the present invention has been described by way of limited embodiments and drawings, the technical idea of the present invention is not limited thereto, and it should be understood by those skilled in the art to which the present invention pertains. Various modifications and variations may be made without departing from the scope of the appended claims.
T1: reference time T1 ': signal area of eyeglass receiver
Claims (5)
And adjusting the duty ratio of the left and right eye liquid crystals by adjusting a width of the synchronization signal while transmitting a synchronization signal for controlling the operation of the left and right eye liquid crystals.
The synchronization signal is a duty ratio adjustment method of the liquid crystal shutter glasses using an infrared signal, characterized in that composed of a time-divided (On) the aggregate area of the plurality of infrared signals.
When the width of the synchronization signal is greater than the width of the reference signal of the duty ratio of the liquid crystal shutter glasses using an infrared signal, characterized in that configured to increase the off time of the liquid crystal.
And the off time of the liquid crystal is shortened when the width of the synchronization signal is smaller than the width of the reference signal.
When the screen of the stereoscopic image display device that transmits the infrared signal to the liquid crystal shutter glasses is brighter than the reference screen brightness, the width of the synchronization signal is larger than the width of the reference signal. How to adjust the duty of the glasses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20100132091A KR101246659B1 (en) | 2010-12-22 | 2010-12-22 | Method for adjusting duty ratio of liquid crystal shutter glasses using infrared light signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20100132091A KR101246659B1 (en) | 2010-12-22 | 2010-12-22 | Method for adjusting duty ratio of liquid crystal shutter glasses using infrared light signal |
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| Publication Number | Publication Date |
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| KR20120070674A true KR20120070674A (en) | 2012-07-02 |
| KR101246659B1 KR101246659B1 (en) | 2013-03-26 |
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| KR20100132091A KR101246659B1 (en) | 2010-12-22 | 2010-12-22 | Method for adjusting duty ratio of liquid crystal shutter glasses using infrared light signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881261A (en) * | 2012-09-28 | 2013-01-16 | 青岛海信电器股份有限公司 | Device and method for controlling backlight of 3D (three-dimensional) liquid crystal display screen and liquid crystal display television |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100052278A (en) * | 2008-11-10 | 2010-05-19 | 삼성전자주식회사 | Display system, display apparatus and control method thereof |
| JP5589311B2 (en) * | 2009-06-09 | 2014-09-17 | ソニー株式会社 | Video display device and video display system |
| KR20110080035A (en) * | 2010-01-04 | 2011-07-12 | 삼성전자주식회사 | 3d glass driving method and 3d glass and 3d image providing display apparatus using the same |
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2010
- 2010-12-22 KR KR20100132091A patent/KR101246659B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881261A (en) * | 2012-09-28 | 2013-01-16 | 青岛海信电器股份有限公司 | Device and method for controlling backlight of 3D (three-dimensional) liquid crystal display screen and liquid crystal display television |
| CN102881261B (en) * | 2012-09-28 | 2014-12-17 | 青岛海信电器股份有限公司 | Device and method for controlling backlight of 3D (three-dimensional) liquid crystal display screen and liquid crystal display television |
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| Publication number | Publication date |
|---|---|
| KR101246659B1 (en) | 2013-03-26 |
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