RU2413266C1 - Electronically controlled 3d glasses - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: glasses have a housing, left- and right-hand side glasses, first and second electronically controlled shutters and an infrared receiver inside the housing of the glasses. The left- and right-hand side glasses are hollow and the first and second electronically controlled shutters lie inside the said glasses, respectively. Each of the shutters has four identical piezoelectric transducers, each having a bimorphous tubular piezoelectric element. A rectangular shaped opaque fine-meshed screen is attached to the piezoelectric element. A unit of pulse amplifiers, comprising two series-connected pulse generating circuits, is connected to the output of the infrared receiver and is placed in the housing of the 3D glasses. The first and second outputs of the first pulse generating circuit are respectively connected to the first and second control inputs of the piezoelectric transducers in the first electronically controlled shutter. The first and second outputs of the second pulse generating circuit are respectively connected to the first and second control inputs of the piezoelectric transducers in the second electronically controlled shutter.

EFFECT: high transparency of the 3D glasses and low response time of the electronically controlled shutters.

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Description

The invention relates to hardware devices of a personal computer / PC / and can be used in the formation of three-dimensional images.

The prototype adopted 3D glasses [1 p.558-567], containing the housing, LCD lenses used with electronically controlled shutters / filters /, in the left and right glass of 3D glasses. The glasses of 3D glasses are made using the technology of LCD cells of the translucent type, which are controlled by signals from the video adapter, the transparency of the glasses changes synchronously with the change of the image of the stereo pair frames on the PC monitor screen [1 p.559]. 3D glasses are connected to the PC video adapter using a flexible connecting wire through a special external controller or integrated on the video adapter board. Instead of a connecting wire for transmitting commands from the controller to the glasses, an IR transmitter is used, and the glasses are equipped with a built-in miniature IR receiver. On the PC monitor, the left and right frames of the stereo pair are displayed sequentially, at the same time the glasses of 3D glasses alternately lose transparency. As a result, each eye sees its own stereo pair frame, which allows you to get a stereo effect. The disadvantages of the prototype: low transparency of the glasses due to the use of LCD cells, the response time of the LCD cells, which in the best case is 5 ms, prevents the frame rate from increasing, at a frame frequency of 100 Hz, half the length of the frame period falls on the response time, what else reduce the transparency of the glass for the viewer.

The purpose of the invention is to increase the transparency of the glasses glasses for vision and reduce the response time of electronically controlled shutters.

Technical results include increasing the transparency of 3D glasses in the open state and reducing the response time of electronically controlled shutters.

The essence of the invention is that a block of pulse amplifiers is introduced into 3D glasses, and a corresponding number of piezoelectric transducers is introduced into each electronically controlled shutter.

Electronically controlled 3D glasses are shown in figure 1, the electronically controlled shutter in figure 2, the block of pulse amplifiers in figure 3.

Electronically controlled 3D glasses / Fig. 1/ include a housing 1, a left 2 and a right 3 glasses, each of which is hollow inside and contains an electronically controlled shutter 4 inside, includes an IR receiver 5 and a block of 6 pulse amplifiers placed on 3D glasses case. The electronically controlled shutter 4 each contains four piezoelectric transducers 7-10. The initial state of the electronically controlled shutters 4 in the left glass is closed, in the right glass it is open. The transparent field in the glass in the open state (Fig. 2/18 mm × 7 mm, which from a distance of 1 meter allows you to see a 22 ”/ 56 cm / screen with a margin, a larger field at this distance is already redundant. Principle of operation of 3D glasses : the monitor displays the left and right frames of the stereo pair sequentially, synchronously with them the glasses of glasses alternately lose transparency / right then the left /, the synchronism of transparency of the corresponding glass and the appearance of the corresponding frame of the stereo pair on the screen is set by the sync pulses from the video controller tera [1, p.560].

3D glasses are connected to the controller using an infrared transceiver. IR receiver 5 / Fig. 1/ receives commands from an IR transmitter connected to the controller [1, p. 563]. The control signals from the output of the IR receiver 5 are supplied sequentially to the block 6 of pulse amplifiers, which includes two pulse generation circuits 12 and 13 connected in series (Fig. 3/). Each pulse generation circuit to receive two identical control pulses with a phase shift between them at the output 180 ° has an output phase inverse cascade [2, p. 80]. From the outputs of the first circuit 12 / Fig. 3/, two control pulses are issued in parallel: the first U _{1 of} positive polarity and the second U _{2 of} negative polarity, the amplitudes of both are equal in absolute value and correspond to the operating voltage of the piezoelectric transducer, both pulses are equal in duration to the left frame of the stereo pair . The second pulse shaping circuit 13 is identical to the first and also generates two control pulses U ₁ , U ₂ along the trailing edge of the pulse U ₁ entering it from the first pulse shaping circuit 12/3 /. The control pulses from the first circuit 12 are supplied synchronously to the first and second control inputs of the electronically controlled shutter 4 of the left glass 2/1 /. The control pulses U ₂ , U ₂ from the second circuit 13 are respectively supplied to the first and second control inputs of the electronically controlled shutter 4 of the right glass 3 / Fig. 1/. An electronically controlled shutter 4 is mounted in the hollow part of each glass of glasses and includes 7-10 piezoelectric transducers identical in shape and size (Fig. 2/), the executive part of each piezoelectric transducer is a bimorph tubular piezoelectric element operating on torsion [3, p.27], characterized by high sensitivity, durability and reliability. A rectangular opaque fine mesh 11 is attached to the executive part of the piezoelectric transducer, its width is 4 mm, length 7 mm. When the left-hand piezoelectric 7-10 control pulses U ₁ , U ₂ arrive at the electrodes, the tubular piezoelectric elements during torsion synchronously rotate four light-tight grids 11 through 90 ° and open the field of view of the left glass, the viewer sees the image of the left frame of the stereo pair with the left eye. At the end of the duration of the control pulses, the opaque grids 11 in the left glass are returned to their original / closed / state, and the control pulses U ₁ and U ₂ from the second pulse generation circuit 13 are fed to the electrodes of the piezoelectric transducers in the right electronically controlled shutter 4 of the right glass: in the right the field of view opens up to the glass, the viewer with his right eye sees the right frame of the stereo pair. The response time of the electronically controlled shutters 4 at the frequencies of the frame scan is almost zero.

The work of 3D points.

With the arrival of the left-frame period start signal to the IR receiver 5, the first pulse generating circuit 12 generates and issues in parallel two control pulses U ₁ , U ₂ , which arrive simultaneously at the first and second inputs of the piezoelectric transducers 7-10 in the electronically controlled shutter 4 of the left glass , the opaque grids 11 rotate 90 ° and open the field of view in the left glass 2. The left eye of the viewer sees the left frame of the stereo pair. The first pulse U ₁ also goes to the input of the second pulse shaping circuit 13, which generates and issues in parallel two control pulses U ₁ , U ₂ to the first and second inputs of the piezoelectric transducers 7-10 in the electronically controlled shutter 4 of the right glass , opaque grids 11 rotate 90 °, open the field of view in the right glass, the right eye of the viewer sees the right frame of the stereo pair. Each eye sees its own frame, the result is a stereo effect. Introduced electronically controlled shutters create full transparency of the glasses in 3D glasses in the open state and do not limit the increase in the frequency of the frame scan.

Used sources

1. Kolesnichenko O.V., Shishigin I.V. PC hardware, 5th ed., St. Petersburg., 2004, p. 588-567.

2. V.F. Barkan, V.K. Zhdanov. Amplification and impulse technology. M., 1981, p. 80.

3. A.F. Plonsky, V.I. Thearo. Piezoelectronics. M., 1979, p. 26, 27.

4. I.V. Fridlyand, V.G. Soshnikov. Automatic control systems in video recording devices. M., 1988, p. 115-122.

Claims (1)

Electronically-controlled 3D glasses containing a case, left and right glasses, the first and second electronically controlled shutters and an IR receiver located on the case of glasses, characterized in that the left and right glasses are hollow, inside of which are placed the first and second electronically controlled gates, each of which includes four identical piezoelectric transducers, each of which includes a bimorph tubular piezoelectric element to which a rectangular opaque small-mesh is attached net, and a block of pulse amplifiers is introduced, including two series-connected pulse-forming circuits, the input of the block of pulse amplifiers is connected to the output of the IR receiver and placed on the body of 3D glasses, the first and second outputs of the first pulse-forming circuit are connected respectively to the first and second control inputs piezoelectric transducers in the first electronically controlled gate, the first and second outputs of the second pulse shaping circuit are connected respectively to the first and second control input m of piezoelectric transducers in the second electronically controlled gate.

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