# US 2020/0401035 A1 · Projecting Apparatus and Projecting Method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401035 A1 - Document ID: US20200401035A1 - Status: Published application - Kind: A1 - Application number: 16/644,237 - Filed: 2019-02-15 - Published: 2020-12-24 - Earliest claimed: 2019-01-04 - Assignees: Hangzhou Zt Model Co., Ltd - Applicants: Hangzhou Zt Model Co., Ltd. - Inventors: Rui FENG - Web page: https://patentgrep.com/patent/US20200401035A1 ## CPC - G03B 35/22: using single projector with stereoscopic-base-defining system - G03B 21/001: {Slide projectors} - G03B 21/145: {Housing details, e.g. position adjustments thereof} - G03B 21/2046: {Positional adjustment of light sources} - G03B 21/2066: {Reflectors in illumination beam (in projection beam G03B21/28)} - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract A projecting apparatus and a projecting method, relates to the field of projecting technologies. The projecting apparatus includes: a light source (1), a projection film (2) and a lens (3), wherein the projection film (2) and the lens (3) are both located in a light path of the light source (1), a focal length of the lens (3) is greater than 0, and a positional relationship between the light source (1) and the lens (3) satisfies a formula: 0 ≤ E ≤ ( 2  1  6 D ) 0 . 8 , wherein E is a distance between the light source and the lens in centimeters; D is the focal length of the lens in centimeters, which solves the technical problem of high costs of 3D protection in the prior art, and can project a pattern on the projection film into a three-dimensional stereo image. ## Claims ### Claim 1 A projecting apparatus, comprising a light source, a projection film and a lens, wherein the projection film and the lens are both located in a light path of the light source, a focal length of the lens is greater than 0, and a positional relationship between the light source and the lens satisfies a formula: 0 ≤ E ≤ ( 2  1  6 D ) 0 . 8 , wherein E is a distance between the light source and the lens in centimeters; D is the focal length of the lens in centimeters. ### Claim 2 (depends on 1) The projecting apparatus according to claim 1, wherein the projecting apparatus comprises a reflective sleeve, and the light source is coaxial with the reflective sleeve, and is connected inside the reflective sleeve. ### Claim 3 (depends on 2) The projecting apparatus according to claim 2, wherein the projecting apparatus comprises a lens frame, and the projection film and the lens are both connected with the lens frame. ### Claim 4 (depends on 3) The projecting apparatus according to claim 3, wherein the reflective sleeve comprises: a sleeve body and a ring plate, and the ring plate is connected with the sleeve body; the lens frame is provided therein with an annular slot, and the ring plate is inserted in the annular slot. ### Claim 5 (depends on 4) The projecting apparatus according to claim 4, wherein a first annular plate and a second annular plate are connected in the lens frame, the annular slot is formed between the first annular plate and the second annular plate, inner diameters of the first annular plate and the second annular plate are both smaller than an outer diameter of the ring plate, outer diameters of the first annular plate and the second annular plate are both larger than the outer diameter of the ring plate, and the inner diameters of the first annular plate and the second annular plate are both larger than an outer diameter of the sleeve body. ### Claim 6 (depends on 4) The projecting apparatus according to claim 4, wherein diameters of the projection film and the lens are both greater than an inner diameter of the sleeve body. ### Claim 7 (depends on 3) The projecting apparatus according to claim 3, wherein the reflective sleeve is connected with the lens frame by insertion, a telescopic driving assembly is provided between the reflective sleeve and the lens frame, and the telescopic driving assembly is configured to drive the reflective sleeve to move along a radial direction of the lens frame. ### Claim 8 (depends on 7) The projecting apparatus according to claim 7, wherein the telescopic driving assembly comprises: a first telescopic cylinder and a second telescopic cylinder, wherein an axis of the first telescopic cylinder is perpendicular to an axis of the second telescopic cylinder; the first telescopic cylinder is hinged between the reflective sleeve and the lens frame through a first hinge shaft; the second telescopic cylinder is hinged between the reflective sleeve and the lens frame through a second hinge shaft; and an axis of the first hinge shaft and an axis of the second hinge shaft are both parallel to an axis of the reflective sleeve. ### Claim 9 (depends on 1) The projecting apparatus according to claim 1, wherein the projection film is provided between the light source and the lens. ### Claim 10 (depends on 1) The projecting apparatus according to claim 1, wherein the lens is provided between the light source and the projection film. ### Claim 11 (depends on 2) The projecting apparatus according to claim 2, wherein an inner diameter of one end of the reflective sleeve close to the projection film is greater than an inner diameter of one end facing away from the projection film. ### Claim 12 (depends on 2) The projecting apparatus according to claim 2, wherein the light source is inserted in the reflective sleeve, and the light source is, by being pushed and pulled, made to slide along an axis direction of the reflective sleeve. ### Claim 13 (depends on 3) The projecting apparatus according to claim 3, wherein the projection film is detachably connected with the lens frame, such that the projection film is replaceable. ### Claim 14 (depends on 4) The projecting apparatus according to claim 4, wherein the lens frame comprises two frame bodies, the two frame bodies are jointed to form the lens frame, and the ring plate is inserted in the annular slot. ### Claim 15 A projecting method, comprising following steps: enabling light emitted from a light source to pass through a projection film and a lens, and converging the light onto a projection plane; and setting a distance between the light source and the lens in centimeters, E, based on 0 ≤ E ≤ ( 2  1  6 D ) 0 . 8 , wherein D is a focal length of the lens in centimeters. ### Claim 16 (depends on 15) The projecting method according to claim 15, wherein the projecting method further comprises: moving the light source, the projection film or the lens along a radial direction of the lens. ### Claim 17 (depends on 15) The projecting method according to claim 15, wherein the projecting method further comprises: enabling the light source to slide along an axis direction of a reflective sleeve, to change a position of the light source inside the reflective sleeve, thereby changing a diameter of light beams emitted through the reflective sleeve. ### Claim 18 (depends on 16) The projecting method according to claim 16, wherein the projecting method further comprises: moving the light source along the radial direction of the lens, to change an incident angle of light passing through the lens, thereby changing a position on the projection plane, to which position the light passing through a same position of the projection film irradiates. ### Claim 19 (depends on 16) The projecting method according to claim 16, wherein the projecting method further comprises: operating the reflective sleeve to enable a ring plate to slide along an annular slot, to allow the reflective sleeve to move along a radial direction of a lens frame, thereby changing a position on the projection film, to which position the light through the reflective sleeve is irradiated. ### Claim 20 (depends on 16) The projecting method according to claim 16, wherein the projecting method further comprises: driving a telescopic driving assembly to move along the radial direction of the lens frame, to change an incident angle, at which the light irradiating to a same position on a pattern is transmitted to the lens.