# US 2013/0154514 A1 · Voltage-controlled light diffusing module, flash lamp module and controlling method thereof based on face information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0154514 A1 - Document ID: US20130154514A1 - Status: Published application - Kind: A1 - Application number: 13/372,491 - Filed: 2012-02-13 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Altek Corporation - Inventors: Ming-Jiun Liaw - Web page: https://patentgrep.com/patent/US20130154514A1 ## CPC - H05B 47/10: Controlling the light source - G03B 15/05: Combinations of cameras with electronic flash apparatus; Electronic flash units - G03B 2215/0592: installed in front of light emitter - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 voltage-controlled light diffusing module, a flash lamp module and a controlling method thereof are provided. The voltage-controlled light diffusing module includes a light diffuser, a driving circuit and an information processing unit. The information processing unit receives face information for deciding a driving voltage of the driving circuit, so as to change transmission of the light diffuser. ## Claims ### Claim 1 A voltage-controlled light diffusing module, comprising: a light diffuser, adjusting scattering energy or transmission energy of light passing the light diffuser by changing a driving voltage of the light diffuser; a driving circuit for the light diffuser, coupled to the light diffuser, providing the driving voltage for the light diffuser; and an information processing unit, coupled to the driving circuit for the light diffuser, receiving at least one face information and deciding the driving voltage of the driving circuit for the light diffuser based on the face information. ### Claim 2 (depends on 1) The voltage-controlled light diffusing module according to claim 1, wherein the light diffuser is a polymer-dispersed liquid crystal (PDLC) display unit or a liquid crystal display (LCD) unit with polymer-dispersed liquid crystal droplet. ### Claim 3 (depends on 1) The voltage-controlled light diffusing module according to claim 1, wherein the light diffuser is a LCD unit. ### Claim 4 (depends on 1) The voltage-controlled light diffusing module according to claim 1 further comprises a face detection unit, coupled to the information processing unit, providing the face information for the information processing unit. ### Claim 5 (depends on 1) The voltage-controlled light diffusing module according to claim 1, wherein the face information includes an information for at least determining whether a face is detected. ### Claim 6 (depends on 1) The voltage-controlled light diffusing module according to claim 1, wherein the face information includes an information for at least determining a distance between the light diffuser and a face. ### Claim 7 A voltage-controlled light diffusing module, comprising: a light diffuser, comprising a plurality of sub-blocks, the light diffuser respectively adjusts scattering energy or transmission energy of light passing the sub-blocks by applying different driving voltages; a driving circuit for the light diffuser, coupled to the light diffuser, respectively providing the driving voltage for the each of the sub-blocks of the light diffuser; and an information processing unit, coupled to the driving circuit for the light diffuser, receiving a message with a face information and respectively determining the driving voltage for each of the sub-blocks of the light diffuser according to the face information. ### Claim 8 (depends on 7) The voltage-controlled light diffusing module according to claim 7, wherein among the sub-blocks of the light diffuser, corresponding sub-blocks relevant to the face information and other sub-blocks irrelevant to the face information are driven by different driving voltages. ### Claim 9 (depends on 7) The voltage-controlled light diffusing module according to claim 7, wherein among the sub-blocks of the light diffuser, when the face information displays a plurality of faces, the driving voltages of a plurality of sub-blocks corresponding to the plurality of faces may be consistent or inconsistent. ### Claim 10 (depends on 7) The voltage-controlled light diffusing module according to claim 7 further comprises a face detection unit, coupled to the information processing unit, providing the face information for the information processing unit. ### Claim 11 (depends on 10) The voltage-controlled light diffusing module according to claim 10, wherein the face detection unit further receives a zoom information and accordingly, in combination with a face size in the face information, provides a face distance information to the data processing unit to determine the driving voltage for each of the sub-blocks of the light diffuser. ### Claim 12 A flash lamp module, comprising: a light source; a reflection unit, reflecting light energy of the light source; a flash driving circuit, coupled to the light source, receiving triggering signal for controlling time or magnitude of light energy output of the light source; and a voltage-controlled light diffusing module based on the face information, configured in front of the light source of the flash lamp module, that is, the voltage-controlled light diffusing module is configured in a direction, wherein light of the light source and reflected light of the reflection unit go forward to the direction, and the voltage-controlled light diffusing module adjusts scattering energy or transmission energy of the light passing the voltage-controlled light diffusing module based on a face information. ### Claim 13 (depends on 12) The flash lamp module according to claim 12, wherein the voltage-controlled light diffusing module based on the face information comprises: a light diffuser, adjusting scattering energy or transmission energy of the light passing the light diffuser by changing a driving voltage of the light diffuser; a driving circuit for the light diffuser, coupled to the light diffuser, providing the driving voltage for the light diffuser; and an information processing unit, coupled to the driving circuit for the light diffuser, receiving at least the face information and deciding the driving voltage of the driving circuit for the light diffuser according to the face information. ### Claim 14 (depends on 12) The flash lamp module according to claim 12, wherein the voltage-controlled light diffusing module based on the face information comprises: a light diffuser, comprising a plurality of sub-blocks, the light diffuser respectively adjusts scattering energy or transmission energy of light passing the sub-blocks by applying different driving voltages; a driving circuit for the light diffuser, coupled to the light diffuser, respectively providing the driving voltage for the sub-blocks of the light diffuser; and an information processing unit, coupled to the driving circuit for the light diffuser, receiving at least one message with the face information and respectively determining the driving voltage for each of the sub-blocks of the light diffuser according to the face information. ### Claim 15 A method for controlling a flash lamp, applicable to control the flash lamp of a voltage-controlled light diffusing module based on a face information, the method comprising: receiving a face information; deciding a driving voltage of a driving circuit based on the face information; adjusting light transmission of a light diffuser based on the driving voltage; and triggering a flash lamp unit to perform a flash procedure. ### Claim 16 (depends on 15) The method for controlling the flash lamp according to claim 15, further comprising: determining whether a face is detected; when the face is detected, determining the driving voltage based on the face information; and when the face is not detected, triggering the flash lamp unit to perform the flash procedure.