Smart Glasses with Eye Protection Function

Patent metadata

Field	Value
Publication number	US-2021132417-A1
Application number	US-202017088783-A
Country	US
Kind code	A1
Filing date	Nov 4, 2020
Priority date	Nov 4, 2019
Publication date	May 6, 2021
Grant date	—

Abstract

Smart glasses with an eye protection function comprise an adjustable focus liquid lens assembly and a drive mechanism. The lens assembly comprises a first lens, a second lens, and a transparent liquid-filled flexible film sandwiched between the first lens and the second lens. The focal length of the lens assembly is determined by the first lens, the second lens, and the flexible film together. The focal length of the flexible film changes as a thickness of the flexible film changes. The drive mechanism is configured to drive the flexible film to deform and thus enable the thickness of the flexible film to be changed such that the focal length of the lens assembly is switched between the first focal length and the second focal length. The glasses enable a user wearing it to blink his or her eyes unconsciously, thereby overcoming the drawback of prior art, and enhancing user experience.

First claim

What is claimed is:

1 . Smart glasses with an eye protection function, configured to be adjustable in focal length when eyes of a user feel fatigue and to provide a blurred vision for the user of the glasses, so that the user will blink his or her eyes unconsciously; the glasses having a first focal length, which enables a clear vision to be provided to the user, and a second focal length, which is different from the first focal length and enables a blurred vision to be provided to the user; and, the glasses comprising:
an adjustable focus liquid lens assembly, comprising:
a first lens;
a second lens; and
a transparent liquid-filled flexible film sandwiched between the first lens and the second lens;
wherein, a focal length of the lens assembly is determined by the first lens, the second lens, and the flexible film together, and a focal length of the flexible film changes as a thickness of the flexible film changes; and
a drive mechanism, configured to drive the flexible film to deform and thus enable the thickness of the flexible film to be changed such that the focal length of the lens assembly is switched between the first focal length and the second focal length.

2 . The glasses of claim 1 , wherein, the first lens is one of a lens for myopia, a lens for presbyopia, and a plano lens that has no visual correcting power, and the second lens is a plano lens that has no visual correcting power; and wherein, the flexible film is attached to the second lens.

3 . The glasses of claim 1 , wherein, the drive mechanism comprises:
a piezoelectric ceramic element, configured to act on the flexible film; and a drive circuit, configured to provide a driving voltage to the piezoelectric ceramic element such that the piezoelectric ceramic element is deformed under the action of the driving voltage and the flexible film is caused to change in thickness, allowing the lens assembly to be switched between the first focal length and the second focal length.

4 . The glasses of claim 3 , wherein, the drive mechanism further comprises a film holder configured to hold one end of the flexible film, wherein, the piezoelectric ceramic element is configured to directly cover the film holder, so that the deformation of the piezoelectric ceramic element can cause displacement of the film holder and in the case that the film holder is displaced, the flexible film is drawn by the film holder to deform, thereby allowing the lens assembly to be switched between the first focal length and the second focal length.

5 . The glasses of claim 4 , wherein, the piezoelectric ceramic element and the film holder are disposed in a frame of the glasses.

6 . The glasses of claim 3 , wherein, the first focal length is a focal length provided by the lens assembly when the driving voltage is zero, and the second focal length is a focal length provided by the lens assembly after deformation of the flexible film under the condition that the driving voltage is not zero.

7 . The glasses of claim 1 , further comprising a power supply module, configured to electrically connect to the drive mechanism for supplying power to the drive mechanism and the entire glasses.

8 . The glasses of claim 1 , further comprising a blink control device, which comprises:
a blink detection unit, configured to detect blinking behavior of a user and calculate a blinking frequency; a comparison unit, configured to compare the blinking frequency detected by the blink detection unit with a preset threshold and transmit a comparison result to a control unit; and the control unit, configured to, when it is determined that the blinking frequency is lower than the preset threshold, send a focus adjustment control signal to the drive mechanism.

9 . The glasses of claim 8 , further comprising a delay module, configured to delay the focus adjustment control signal for a first delay period such that when the drive mechanism receives the focus adjustment control signal, the lens assembly is caused to be switched from the first focal length to the second focal length after the first delay period.

10 . The glasses of claim 9 , wherein, the delay module is further configured to provide a delay of a second delay period such that the lens assembly is caused to be switched back to the first focal length from the second focal length after the second delay period.

Assignees

• Univ Jiliang China

Inventors

• Jin Huaizhou
• Jin Shangzhong
• Li Yifan
• Lin Xueli
• Zhang Xuecheng
• Tan Hangbin
• Zhang Fei

Classifications

• G02C11/10

  Electronic devices other than hearing aids · CPC title

• G02C7/085 Primary

  Fluid-filled lenses, e.g. electro-wetting lenses · CPC title

• G02C7/104 Primary

  having spectral characteristics for purposes other than sun-protection · CPC title