A pair of three-dimensional glasses include two lenses, a frame holding the two lenses, a circuit board controlling the two lenses, and a power unit powering the circuit board. The power unit includes a control switch. The control switch extends from an inner surface of the frame. The circuit board is powered on when the control switch is contacted, and powered off when the control switch is not contacted.

BACKGROUND

1. Technical Field

The present disclosure generally relates to imaging technology, and particularly to three-dimensional (3D) imaging glasses.

2. Description of Related Art

The illusion of three dimensions on a two dimensional surface can be created by providing each eye with different visual information. 3D glasses create the illusion of three dimensions when viewing specially prepared images. Passive 3D glasses can have one red color filter lens in front of one eye and one blue or cyan color filter lens in front of the other, or use polarized filters, with one lens polarized vertically and the other horizontally, with the two images required for stereo vision polarized the same way. Polarized 3D glasses allow for a more colorful 3D image, compared to the red-blue lenses which produce only a dull black-and-white picture with red and blue fringes.

Active 3D glasses can achieve the 3D image through active function, including dual display 3D glasses and liquid crystal shutter glasses. The dual display 3D glasses have separate video screens for each eye. The liquid crystal shutter glasses cooperate with a 3D display screen, and include two liquid crystal units to shutter right-eye image and left-eye image by turns. The liquid crystal shutter glasses have been distributed to audiences at 3D movies.

The active 3D glasses require electric power to perform the shuttering operation, but should also be portable, making power supply a challenge. Continued power supply consumes too much electric power, and electric wires are inconvenient for the portable 3D glasses. Related active 3D glasses may have a switch to turn on or turn off the active 3D glasses. However, users can often forget to turn off the active 3D glasses during standby and idle periods. Some active 3D glasses cooperate with additional devices detecting the usage state of the glasses and control the power supply accordingly. If the active 3D glasses are left unused for a period, the sensor sends signals to stop the power supply. However, such devices are usually expensive.

Therefore, it is desirable to provide 3D glasses which can overcome the described limitations.

DETAILED DESCRIPTION

As shown inFIG. 1andFIG. 2, 3D glasses10of one embodiment include two lenses11, a frame12, a power unit16and a circuit board18.

The lenses11may be photoelectric units, such as display screens or liquid crystal shutters, but are not limited thereto.

The frame12includes two rims128respectively holding the two lenses11, a bridge121connecting the two rims128, two connection bases124respectively connected to the two rims128, and two temples125respectively connected to the two connection bases124. Each connection base124and each temple125respectively defines a first hollow120and a second hollow140therein, and the first hollow120and the second hollow140cooperatively form a cavity. The two temples125may be respectively connected to the two connection bases124through rotation shafts or hinges, so the temples125are rotatable against the connection bases124. Accordingly, the temples125can bend toward the lenses11to be stored or can be unfolded for use. The two temples125may be respectively fixed to the two connection bases124through other means, or may just be received in the two connection bases124in other embodiments. The connection bases124may be fixedly connected or rotatable to the rims128through any means.

The circuit board18is stored in the first hollow120of one connection base124, and can be screwed to the connection base124. The circuit board18includes electric elements and circuits to actively control the two lenses11, so different images or shutters are provided for each side and 3D stereoscopic images are generated. The power unit16includes a battery160, a control switch162and a lead wire164. The battery160is also stored in the first hollow120of the connection base124, and is located on the circuit board18. The battery160is electrically connected to the control switch162and the circuit board18to supply electric power to the circuit board18.

The control switch162is located on one of the temples125. The temple125has an inner surface144and defines an opening1440in the inner surface144. The opening1440communicates the second hollow140and the surroundings. The control switch162is aligned with the opening1440. A portion of the control switch162is stored in the second hollow140, and a portion of the control switch162extends through the opening1440of the temple125. The control switch162includes a base1622stored in the second hollow140of the temple125, an electrical contact1626surrounded by the base1622and extending through the base1622, and an elastic protrusion1624extending from both the base1622and the opening1440of the temple125.

The base1622may be screwed to or adhered to a sidewall of the temple125, and faces the opening1440. The base1622surrounds the electrical contact1626, and can retain the positions of the electrical contact1626and the elastic protrusion1624, so the elastic protrusion1624can always face the electrical contact1626. The elastic protrusion1624includes a convex outer surface and a concave inner surface. The elastic protrusion1624is contoured to be activated by touch or press, so it is located right above the electrical contact1626. Accordingly, the outer surface of the elastic protrusion1624is also the outer surface of the control switch162, and the elastic protrusion1624extends from the inner surface144of the temple125.

The lead wire164is electrically connected to the electrical contact1626and the battery160. The lead wire164may include two wires to electrically connect the battery160and the control switch162. One of the wires may electrically connect the electrical contact1626and an anode or a cathode of the battery160, and the other wire may electrically connect the other electrode of the battery160and a portion of the control switch162that will contact the electrical contact1626when the elastic protrusion1624is contacted.

When the control switch162is not contacted, the elastic protrusion1624does not bias the electrical contact1626, so the circuit between the battery160and the circuit board18remains open. Since the control switch162is located on the inner surface144of the temple125, when not worn, the 3D glasses10automatically turn off, and no electric power of the battery160is expended. With no additional step required to turn off the 3D glasses10, no additional mechanism is needed to detect the operation of the 3D glasses10, and costs are conserved.

As shown inFIG. 3, when the 3D glasses10are worn, the 3D glasses10are mounted on the head20(marked by the dotted line inFIG. 3), and the temples125contact the head20. The control switch162located on the inner surface144is automatically contacted, and the elastic protrusions1624biased. Accordingly, the elastic protrusion1624activates the electrical contact1626to complete the circuit between the battery160and the circuit board18and power is supplied to the circuit board18and the lenses11operate. Thus, once the 3D glasses10are worn, the 3D glasses10are automatically turned on, and no additional step is needed to turn on the 3D glasses10.

When the 3D glasses10are removed, force of the elastic protrusion1624automatically recovers shape and position thereof, whereby the control switch162again extends from the inner surface144of the frame12, and the 3D glasses10are automatically turned off.

Compared to the relative art, supply and stop of the electric power are automatically switched according to the wear of the 3D glasses of the present disclosure. Once the 3D glasses are worn, the 3D glasses are turned on; and once the 3D glasses are taken off, the 3D glasses are turned off. Thus, the electric power is effectively saved, and the usage of the 3D glasses is convenient. Furthermore, the 3D glasses of the present disclosure can have a simpler structure then the relative 3D glasses including other power-saving unit.

It is believed that the present embodiment and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being exemplary embodiments of the disclosure.