# US 10,768,500 B2 · Electrochromic systems for head-worn computer systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,768,500 B2 - Document ID: US10768500B2 - Status: Granted - Kind: B2 - Application number: 15/839,946 - Filed: 2017-12-13 - Published: 2018-05-10 - Granted: 2020-09-08 - Earliest claimed: 2016-09-08 - Assignees: Mentor Acquisition One, LLC - Applicants: Mentor Acquisition One, LLC - Inventors: Ralph F. Osterhout - Web page: https://patentgrep.com/patent/US10768500B2 ## CPC - G02F 1/153: Constructional details - G02B 7/006: {Filter holders} - G02B 27/017: {Head mounted} - G02B 27/0172: {characterised by optical features} - G02B 27/0176: {characterised by mechanical features} - G02F 1/155: Electrodes - G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility} - G02B 2027/0156: {with optionally usable elements} - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A removable lens for glasses includes an electrochromic layer adapted to transition between at least two states of a transparency level dependent on an electrical condition applied to the electrochromatic layer and an electrical connection element physically adapted to make an electrical connection with the electrochromic layer, wherein the electrical connection element is positioned to align with a variable-power electrode mounted on the glasses such that, when the removable lens is mounted on the glasses, the variable-power electrode and the electrical connection element make the electrical connection between the variable-power electrode and an electrically conductive layer of the electrochromic layer. ## Claims ### Claim 1 A system, comprising: a head-mountable frame having a front portion and a rear portion; a lens coupled to the front portion of the head-mountable frame; a front surface disposed between the lens and the rear portion of the head-mountable frame; a transmissive display disposed below the front surface and further disposed between the lens and the rear portion of the head-mountable frame; and one or more processors, wherein the lens obscures a view of the front surface. ### Claim 2 (depends on 1) The system of claim 1, wherein the lens is removable and is mechanically holdable in place within the system by a mounting magnet system. ### Claim 3 (depends on 1) The system of claim 1, wherein the lens is removable and is mechanically holdable in place within the system by a mechanical system. ### Claim 4 (depends on 1) The system of claim 1, wherein the lens is tinted to obscure the view of the front surface. ### Claim 5 (depends on 1) The system of claim 1, further comprising a sensor mounted to the front surface, wherein obscuring the view of the front surface comprises obscuring a view of the sensor. ### Claim 6 (depends on 5) The system of claim 5, wherein the sensor comprises a camera. ### Claim 7 (depends on 5) The system of claim 5, wherein: the lens comprises a first region having a first transparency level and a second region having a second transparency level, the first transparency level is a greater transparency level than the second transparency level, and the first region is disposed adjacent to the sensor. ### Claim 8 (depends on 1) The system of claim 1, further comprising an eye cover, wherein the eye cover is disposed between the front surface and the rear portion of the head wearable device, wherein the eye cover mitigates a transmission of light. ### Claim 9 (depends on 8) The system of claim 8, wherein the eye cover is removable and is holdable in place by a mounting magnet system. ### Claim 10 (depends on 8) The system of claim 8, wherein the eye cover comprises a flexible shield. ### Claim 11 (depends on 8) The system of claim 8, wherein the frame comprises a first eye region and a second eye region and wherein the eye cover comprises a single member disposed adjacent to the first eye region and further disposed adjacent to the second eye region. ### Claim 12 (depends on 1) The system of claim 1, further comprising a front light shield that mitigates a transmission of light through the lens. ### Claim 13 (depends on 12) The system of claim 12, wherein the front light shield comprises an opaque surface. ### Claim 14 (depends on 12) The system of claim 12, wherein the front light shield comprises a polarized surface. ### Claim 15 (depends on 1) The system of claim 1, wherein the lens comprises an electrochromic layer, wherein the lens transitions from a first transparency level to a second transparency level in response to an electrical signal presented via the one or more processors. ### Claim 16 (depends on 1) The system of claim 1, wherein the system further comprises an optical module, wherein the front surface is disposed to obscure a view of the optical module. ### Claim 17 (depends on 1) The system of claim 1, wherein the front surface is disposed to obstruct a view of a surrounding environment. ### Claim 18 (depends on 1) The system of claim 1, wherein the front surface is disposed to obstruct a view of the lens. ### Claim 19 (depends on 18) The system of claim 18, wherein the front surface is disposed to obstruct an upper portion of the view of the lens. ### Claim 20 (depends on 1) The system of claim 1, wherein a surface area of the front surface is approximately half the size of a surface area of the lens.