# US 12,216,379 B2 · Liquid crystal lens, goggles, electronic product, and liquid crystal lens driving method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,216,379 B2 - Document ID: US12216379B2 - Status: Granted - Kind: B2 - Application number: 18/182,354 - Filed: 2023-03-12 - Published: 2023-09-14 - Granted: 2025-02-04 - Earliest claimed: 2022-03-14 - Assignees: Chengdu Yeta Technology Co., Ltd. - Applicants: Chengdu Yeta Technology Co., Ltd. - Inventors: Wenbin Feng; Zhiqiang Liu; Bin Wang - Web page: https://patentgrep.com/patent/US12216379B2 ## CPC - G02F 1/294: {Variable focal length devices} - G02C 7/083: {Electrooptic lenses} - G02F 1/29: for the control of the position or the direction of light beams, i.e. deflection - 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 - G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00) ## Abstract A liquid crystal lens includes a liquid crystal layer, a first electrode layer, a second electrode layer, transparent substrates. The second electrode layer includes multiple electrode units arranged sequentially from a position adjacent to a center thereof r toward a position away from the center thereof. Each of the electrode units includes at least one conductive line which extends from a first position of the electrode unit to a second position of the electrode unit. A distance between the second position and the center of the second electrode layer is greater than a distance between the first position and the center of the second electrode layer. A spacing distance between adjacent conductive lines is less than or equal to 100 μm. A way of driving the liquid crystal lens is simple, and an ideal potential distribution can be obtained and not affected by change of characteristics of a high-resistance film. ## Claims ### Claim 1 A liquid crystal lens, comprising a liquid crystal layer, a first electrode layer, a second electrode layer, a first transparent substrate, and a second transparent substrate, the first electrode layer and the second electrode layer being respectively arranged at two opposite sides of the liquid crystal layer, the first transparent substrate being arranged at one side of the first electrode layer that is opposite to the liquid crystal layer, the second transparent substrate being arranged at one side of the second electrode layer that is opposite to the liquid crystal layer; the second electrode layer comprising multiple electrode units, the multiple electrode units being arranged sequentially from a position adjacent to a center of the second electrode layer toward a position away from the center of the second electrode layer, each of the electrode units comprising at least one conductive line, the conductive line being extended from a first position of the electrode unit to a second position of the electrode unit, a distance between the second position and the center of the second electrode layer being greater than a distance between the first position and the center of the second electrode layer, a spacing distance between adjacent conductive lines being less than or equal to 100 μm, the conductive line having an end driven by a first driving voltage and an opposite end driven by a second driving voltage, the spacing distances between adjacent ones of the conductive lines are identical, the width of every part of the conductive line is made the same, the electrode units comprise one conductive line, and the conductive line comprises multiple intermediate connection sections and multiple concentric circular rings, adjacent ones of the concentric circular rings being connected by means of the intermediate connection sections. ### Claim 2 (depends on 1) The liquid crystal lens according to claim 1, wherein the multiple electrode units are arranged to cause, under action of the first driving voltage and the second driving voltage, liquid crystal of the liquid crystal layer to form a phase distribution equivalent to a Fresnel lens. ### Claim 3 (depends on 1) The liquid crystal lens according to claim 1, further comprising an electrode lead set, the electrode lead set comprising a first electrode lead and a second electrode lead, the conductive line of the electrode units comprising multiple curved segments arranged from inside to outside, each of the curved segments being broken at a site of the electrode lead set, wherein one of the curved segments that is located outermost has one end electrically connected to the second electrode lead and an opposite end connected to an adjacent one of the curved segments at a same side of the electrode lead set, and wherein one of the curved segments that is located innermost has one end electrically connected to the first electrode lead and an opposite end connected to an adjacent one of the curved segments at a same side of the electrode lead set, remaining ones of the curved segments having one end connected to an adjacent one of the curved segments at a same side of the electrode lead set and an opposite end connected to another adjacent one of the curved segments at a same side of the electrode lead set. ### Claim 4 (depends on 3) The liquid crystal lens according to claim 3, wherein the curved segments are arcs, and the spacing distance between adjacent conductive lines is the same. ### Claim 5 (depends on 3) The liquid crystal lens according to claim 3, wherein the curved segments are arc, and the spacing distance between adjacent ones of at least a portion of the curved segments is different. ### Claim 6 (depends on 5) The liquid crystal lens according to claim 5, wherein each spacing distance between adjacent ones of the curved segments satisfies the potential distribution formed in the liquid crystal lens being a spherical distribution or a conic distribution. ### Claim 7 (depends on 1) The liquid crystal lens according to claim 1, wherein a shape of the conductive line is a spiral. ### Claim 8 (depends on 7) The liquid crystal lens according to claim 7, wherein the shape of the conductive line is a spiral line defined by a first spiral line equation, the first spiral line equation being as follows: { x = r ⁢ cos ⁢ ( g ⁢ ( r ) ) y = r ⁢ sin ⁡ ( g ⁢ ( r ) ) , where ⁢ ⁢ g ⁡ ( r ) = ± ( 4 ⁢ a 2 ⁢ r 2 - 1 - arctan ⁡ ( 4 ⁢ a 2 ⁢ r 2 - 1 ) ) where r indicates radius of polar coordinates; g(r) is polar angle; and a is an equation parameter. ### Claim 9 (depends on 7) The liquid crystal lens according to claim 7, wherein the shape of the conductive line is a spiral line defined by a second spiral line equation, the second spiral line equation being as follows: { x = r ⁢ cos ⁢ ( g ⁢ ( r ) ) y = r ⁢ sin ⁡ ( g ⁢ ( r ) ) where g ⁡ ( r ) = ± ( arctan ⁡ ( R 2 - r 2 ( m 2 + 1 ) ⁢ r 2 - R 2 ) + m 2 + 1 ⁢ arc ⁢ sinh ⁡ ( m 2 + 1 ⁢ R 2 - r 2 mR ) ) where r indicates radius of polar coordinates; g(r) is polar angle; m is a parameter related to a material of the liquid crystal; and R is a radius of curvature of the lens. ### Claim 10 (depends on 1) The liquid crystal lens according to claim 1, wherein a high-resistance film is arranged between the second electrode layer and the liquid crystal layer, or an insulation layer is arranged between the second electrode layer and the liquid crystal layer, or an insulation layer is arranged between the second electrode layer and the liquid crystal layer and a high-resistance film is arranged between the insulation layer and the liquid crystal layer. ### Claim 11 (depends on 1) The liquid crystal lens according to claim 1, wherein a line shape of the electrode unit is parabolic. ### Claim 12 (depends on 1) The liquid crystal lens according to claim 1, wherein the number of the conductive line of the electrode unit is greater than or equal to 2, and the conductive lines are arranged in rotational symmetry about a center defined by a point of the second electrode layer. ### Claim 13 (depends on 1) The liquid crystal lens according to claim 1, wherein the liquid crystal lens further comprises a conducting piece, and a projection that is cast by the conducting piece on the second electrode layer is located on an interfacing site between adjacent ones of the electrode units, the conducting piece receiving a third driving voltage. ### Claim 14 Goggles comprising a frame and a lens, the lens being mounted on the frame, the lens comprising the liquid crystal lens, the liquid crystal lens comprising a liquid crystal layer, a first electrode layer, a second electrode layer, a first transparent substrate, and a second transparent substrate, the first electrode layer and the second electrode layer being respectively arranged at two opposite sides of the liquid crystal layer, the first transparent substrate being arranged at one side of the first electrode layer that is opposite to the liquid crystal layer, the second transparent substrate being arranged at one side of the second electrode layer that is opposite to the liquid crystal layer; the second electrode layer comprising multiple electrode units, the multiple electrode units being arranged sequentially from a position adjacent to a center of the second electrode layer toward a position away from the center of the second electrode layer, each of the electrode units comprising at least one conductive line, the conductive line being extended from a first position of the electrode unit to a second position of the electrode unit, a distance between the second position and the center of the second electrode layer being greater than a distance between the first position and the center of the second electrode layer, a spacing distance between adjacent conductive lines being less than or equal to 100 μm, the conductive line having an end driven by a first driving voltage and an opposite end driven by a second driving voltage, the spacing distances between adjacent ones of the conductive lines are identical, the width of every part of the conductive line is made the same, the electrode units comprise one conductive line, and the conductive line comprises multiple intermediate connection sections and multiple concentric circular rings, adjacent ones of the concentric circular rings being connected by means of the intermediate connection sections. ### Claim 15 (depends on 14) The goggles according to claim 14, wherein the electrode units comprise one conductive line, and the conductive line comprises multiple intermediate connection sections and multiple concentric circular rings, adjacent ones of the concentric circular rings being connected by means of the intermediate connection sections. ### Claim 16 An electronic product comprising a control circuit and the liquid crystal lens, the liquid crystal lens comprising a liquid crystal layer, a first electrode layer, a second electrode layer, a first transparent substrate, and a second transparent substrate, the first electrode layer and the second electrode layer being respectively arranged at two opposite sides of the liquid crystal layer, the first transparent substrate being arranged at one side of the first electrode layer that is opposite to the liquid crystal layer, the second transparent substrate being arranged at one side of the second electrode layer that is opposite to the liquid crystal layer; the second electrode layer comprising multiple electrode units, the multiple electrode units being arranged sequentially from a position adjacent to a center of the second electrode layer toward a position away from the center of the second electrode layer, each of the electrode units comprising at least one conductive line, the conductive line being extended from a first position of the electrode unit to a second position of the electrode unit, a distance between the second position and the center of the second electrode layer being greater than a distance between the first position and the center of the second electrode layer, a spacing distance between adjacent conductive lines being less than or equal to 100 μm, the conductive line having an end driven by a first driving voltage and an opposite end driven by a second driving voltage; the control circuit being electrically connected to the liquid crystal lens, the spacing distances between adjacent ones of the conductive lines are identical, the width of every part of the conductive line is made the same, the electrode units comprise one conductive line, and the conductive line comprises multiple intermediate connection sections and multiple concentric circular rings, adjacent ones of the concentric circular rings being connected by means of the intermediate connection sections. ### Claim 17 (depends on 16) The electronic product according to claim 16, wherein the electrode units comprise one conductive line, and the conductive line comprises multiple intermediate connection sections and multiple concentric circular rings, adjacent ones of the concentric circular rings being connected by means of the intermediate connection sections. ### Claim 18 A liquid crystal lens driving method, being applicable to the liquid crystal lens which comprises a liquid crystal layer, a first electrode layer, a second electrode layer, a first transparent substrate, and a second transparent substrate, the first electrode layer and the second electrode layer being respectively arranged at two opposite sides of the liquid crystal layer, the first transparent substrate being arranged at one side of the first electrode layer that is opposite to the liquid crystal layer, the second transparent substrate being arranged at one side of the second electrode layer that is opposite to the liquid crystal layer; the second electrode layer comprising multiple electrode units, the multiple electrode units being arranged sequentially from a position adjacent to a center of the second electrode layer toward a position away from the center of the second electrode layer, each of the electrode units comprising at least one conductive line, the conductive line being extended from a first position of the electrode unit to a second position of the electrode unit, a distance between the second position and the center of the second electrode layer being greater than a distance between the first position and the center of the second electrode layer, a spacing distance between adjacent conductive lines being less than or equal to 100 μm, the conductive line having an end driven by a first driving voltage and an opposite end driven by a second driving voltage; defining a first driving voltage as V1 and a second driving voltage the voltage as V2, the spacing distances between adjacent ones of the conductive lines are identical, the width of every part of the conductive line is made the same, the electrode units comprise one conductive line, and the conductive line comprises multiple intermediate connection sections and multiple concentric circular rings, adjacent ones of the concentric circular rings being connected by means of the intermediate connection sections, the method comprising the following steps: S1: acquiring a voltage region for linear response of liquid crystal of the liquid crystal lens; S2: acquiring a minimum voltage Vmin and a maximum voltage Vmax of a linear working region of the liquid crystal according to the voltage region for linear response of the liquid crystal; and S3: adjusting a voltage difference of V1 and V2 according to the minimum voltage Vmin and the maximum voltage Vmax in order to adjust an optical power of the liquid crystal lens and/or to cause a state of the liquid crystal lens between a positive lens and a negative lens, wherein Vmin≤V1≤Vmax, and Vmin≤V2≤Vmax. ### Claim 19 (depends on 18) The liquid crystal lens driving method according to claim 18, wherein the electrode units comprise one conductive line, and the conductive line comprises multiple intermediate connection sections and multiple concentric circular rings, adjacent ones of the concentric circular rings being connected by means of the intermediate connection sections.