# US 2015/0146084 A1 · Electronic apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0146084 A1 - Document ID: US20150146084A1 - Status: Published application - Kind: A1 - Application number: 14/285,486 - Filed: 2014-05-22 - Published: 2015-05-28 - Earliest claimed: 2013-11-22 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hun-young Ryu - Web page: https://patentgrep.com/patent/US20150146084A1 ## CPC - H04N 23/73: by influencing the exposure time - G03B 7/0997: Through the lens [TTL] measuring - G03B 9/36: Sliding rigid plate - G03B 7/083: for control of exposure time - G03B 2217/002: Details of arrangement of components in or on camera body - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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 An electronic apparatus is disclosed. The electronic apparatus includes: an imaging device which converts light into an image signal; a lens unit positioned in front of the imaging device to form an image on the imaging device from light incident from an object; a shutter unit interposed between the lens unit and the imaging device to expose the imaging device to the light incident from the object based on a predetermined exposure time and that includes a shutter curtain that regulates the light incident from the object; and a measurement unit which measures an actual exposure time of the shutter unit. The measurement unit is positioned behind the shutter curtain and includes a light-receiving sensor which receives light incident on the measurement unit from the light incident from the object other than the light of the effective image area incident on the imaging device. ## Claims ### Claim 1 An electronic apparatus comprising: an imaging device which converts light of an effective image area incident on the imaging device into an image signal; a lens unit which is positioned in front of the imaging device to form an image on the imaging device from light incident from an object through the lens unit; a shutter unit which is interposed between the lens unit and the imaging device to expose the imaging device to the light incident from the object based on a predetermined exposure time, and comprises a shutter curtain that regulates the light incident from the object, and a base plate and a cover plate which are positioned in front of and behind the shutter curtain, respectively, and each of which has an aperture that forms the effective image area; and a measurement unit which measures an actual exposure time of the shutter unit; wherein the measurement unit is positioned behind the shutter curtain, and comprises a light-receiving sensor which receives light incident on the measurement unit from the light incident from the object through the lens unit other than the light of the effective image area incident on the imaging device, and a first optical window that guides the light incident from the object through the lens unit to the light-receiving sensor is provided outside the aperture of the base plate and a condenser lens which focuses light incident through the first optical window on the light-receiving sensor is provided in the first optical window. ### Claim 2 (depends on 1) The electronic apparatus of claim 1, further comprising a control unit which compares the predetermined exposure time of the shutter unit with the actual exposure time measured by the measurement unit, and corrects the predetermined exposure time of the shutter unit to generate a new exposure time. ### Claim 3 (depends on 1) The electronic apparatus of claim 1, wherein the light-receiving sensor is disposed on the cover plate. ### Claim 4 (canceled) ### Claim 5 (depends on 1) The electronic apparatus of claim 1, wherein the condenser lens is supported by the base plate. ### Claim 6 (depends on 1) The electronic apparatus of claim 1, wherein the condenser lens is supported by the cover plate. ### Claim 7 (depends on 3) The electronic apparatus of claim 3, wherein the shutter curtain comprises a front curtain assembly and a rear curtain assembly, the shutter unit further comprises a separating curtain which is interposed between the front curtain assembly and the rear curtain assembly and has an aperture corresponding to the effective image area, and a second optical window open in succession to the first optical window is provided in the separating curtain. ### Claim 8 (depends on 7) The electronic apparatus of claim 7, wherein the second optical window has a shape of a concave notch recessed from an edge of the separating curtain. ### Claim 9 (depends on 7) The electronic apparatus of claim 7, wherein the second optical window has a shape of a slit formed by removing a portion of the separating curtain inwardly distanced apart from an edge of the separating curtain. ### Claim 10 (depends on 9) The electronic apparatus of claim 9, wherein a longitudinal axis of the slit extends in a travel direction of the front curtain assembly and the rear curtain assembly. ### Claim 11 (depends on 1) The electronic apparatus of claim 1, further comprising a mount unit on which the lens unit is mounted and which defines an incident area through which the light incident from the object is incident on the shutter unit, wherein a third optical window for the light incident on the measurement unit is provided outside the incident area of the mount unit.