Patents by Inventor Hung-Hsiang Chang
Hung-Hsiang Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240132246Abstract: A carton with a detachable buffer plate set includes a bottom plate, two long side plates, an upper cover, two short side plates, two reinforcing side plates, and a detachable buffer plate set. The long side plates and the short side plates are connected to the bottom plate. The upper cover is connected to one of the long side plates. The two reinforcing side plates are connected to the two short side plates respectively. The detachable buffer plate set is detachably connected to one of the reinforcing side plates. Accordingly, by detaching the detachable buffer plate set for supporting and buffering, products of similar size or products with accessories of different sizes may use the same-sized cartons and paper-plastic boxes, so that extra die-cutting costs and storage costs are avoided.Type: ApplicationFiled: December 6, 2022Publication date: April 25, 2024Inventors: Yu-Hsiang CHENG, Hung-Chieh CHANG
-
Patent number: 9030922Abstract: The invention relates to recording on a medium, and in particular, to laser control during recording data on an optical medium. A laser control method for dynamically adjusting laser power during recording data onto an optical disc comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.Type: GrantFiled: June 9, 2009Date of Patent: May 12, 2015Assignee: Mediatek Inc.Inventors: Chih-Ching Yu, Hung-Hsiang Chang, Ping-Tsai Tsai
-
Patent number: 7724624Abstract: A signal gain control method and system for use in optical disc drives to prevent undesirable saturation occurrences in circuit operations. The method includes fetching a preset reading front monitor diode signal and a preset gain controlling signal for reading; generating a front monitor diode signal by a front monitor diode signal conversion circuit; calculating a gain controlling signal based on the preset gain controlling signal for reading, the preset reading front monitor diode signal, and the front monitor diode signal by a signal processor; adjusting a gain for detection signals according to the gain controlling signal by a gain adjustment unit; and generating control signals according to the adjusted detection signals by a pre-amp module.Type: GrantFiled: August 24, 2007Date of Patent: May 25, 2010Assignee: Mediatek Inc.Inventors: Chih-Yu Fan, Ying-Feng Huang, Hung-Hsiang Chang
-
Publication number: 20090245051Abstract: The invention relates to recording on a medium, and in particular, to laser control during recording data on an optical medium. A laser control method for dynamically adjusting laser power during recording data onto an optical disc comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.Type: ApplicationFiled: June 9, 2009Publication date: October 1, 2009Applicant: MEDIATEK INC.Inventors: Chih-Ching Yu, Hung-Hsiang Chang, Ping-Tsai Tsai
-
Patent number: 7561508Abstract: The invention relates to recording on a medium, and in particular, to laser control during recording data on an optical medium. A laser control method for dynamically adjusting laser power during recording data onto an optical disc comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.Type: GrantFiled: February 1, 2006Date of Patent: July 14, 2009Assignee: Mediatek Inc.Inventors: Chih-Ching Yu, Hung-Hsiang Chang, Ping-Tsai Tsai
-
Publication number: 20090067304Abstract: An optical recording apparatus. A laser diode driver performs optimum power calibration according to a predetermined target value to obtain reference recording power, and adjusts the reference recording power to obtain testing recording power settings. A signal process device obtains recording qualities respectively in predetermined test regions of an optical storage medium corresponding to the reference recording power and the testing recording power settings. A processor obtains an optimum recording power according to the recording quality, obtains an optimum target value corresponding to the optimum recording power. The optimum target value is then used for data recording.Type: ApplicationFiled: September 6, 2007Publication date: March 12, 2009Applicant: MEDIATEK INC.Inventors: Hung-Hsiang Chang, Ying-Feng Huang
-
Publication number: 20090059740Abstract: An optical recording apparatus for recording data to an optical storage medium. An optical pickup unit emits a light beam to a recording region of the optical storage medium, and receives the light beam reflected from the recording region. A sled mechanism moves the optical pickup unit in a predetermined direction. A processor obtains a boundary between a recorded region and an unrecorded region on the optical storage medium according to the reflected light beam, and obtains a recording address corresponding to the unrecorded region next to the boundary.Type: ApplicationFiled: August 30, 2007Publication date: March 5, 2009Applicant: MEDIATEK INC.Inventors: Hung-Hsiang Chang, Ying-Feng Huang, Shang-Pin Sun
-
Publication number: 20090052292Abstract: A signal gain control method and system for use in optical disc drives to prevent undesirable saturation occurrences in circuit operations. The method includes fetching a preset reading front monitor diode signal and a preset gain controlling signal for reading; generating a front monitor diode signal by a front monitor diode signal conversion circuit; calculating a gain controlling signal based on the preset gain controlling signal for reading, the preset reading front monitor diode signal, and the front monitor diode signal by a signal processor; adjusting a gain for detection signals according to the gain controlling signal by a gain adjustment unit; and generating control signals according to the adjusted detection signals by a pre-amp module.Type: ApplicationFiled: August 24, 2007Publication date: February 26, 2009Inventors: Chih-Yu Fan, Ying-Feng Huang, Hung-Hsiang Chang
-
Patent number: 7460455Abstract: A method used in an optical storage device having a pickup head. The pickup head includes an object lens, a first and a second light source. The object lens focuses the laser light generated by the first or the second light source onto a first or a second focal point. A driving control effort is used to change the location of the object lens. The method includes the following steps: providing the driving control effort to move the object lens; measuring a first parameter when the first focal point passes through a predetermined layer of an optical disc; measuring a second parameter when the second focal point passes through the predetermined layer of the optical disc; and (d) determining the relationship between the difference of object lens location and the driving control effort according to the predetermined distance, the first parameter, and the second parameter.Type: GrantFiled: December 1, 2004Date of Patent: December 2, 2008Assignee: Mediatek IncorporationInventors: Hung-Hsiang Chang, Fu-Shan Wang
-
Publication number: 20080192614Abstract: A method is used in an optical storage device having a pickup head. The pickup head includes an object lens, a first light source and a second light source. The object lens focuses the laser light generated by the first light source onto a first focal point or focuses the laser light generated by the second light source onto a second focusing point. A driving control effort is used to change the location of the object lens. The method includes the following steps: providing the driving control effort to move the object lens; measuring a first parameter when a signal reaches a first state; measuring a second parameter when the signal reaches a second state; and determining the relationship between the difference of object lens location and the driving control effort according to a predetermined distance, the first parameter, and the second parameter.Type: ApplicationFiled: April 23, 2008Publication date: August 14, 2008Inventors: Hung-Hsiang Chang, Fu-Shan Wang
-
Patent number: 7336568Abstract: A method for controlling long seeking operation in an optical disc drive is provided. The optical disc drive includes a sled actuator, a pickup head installed on the sled actuator for reading and/or writing data in an optical disc, and a controller for controlling the sled actuator to move together with the pickup head. The method includes the steps of (a) receiving remaining tracks information indicating a number of tracks remained to be crossed by the sled actuator and/or the pickup head; (b) receiving velocity information indicating a velocity of the sled actuator and/or the pickup head; (c) receiving acceleration information indicating an acceleration of the sled actuator and/or the pickup head; (d) driving the sled actuator to move according to the remaining tracks information, the velocity information, and the acceleration information.Type: GrantFiled: October 1, 2004Date of Patent: February 26, 2008Assignee: Mediatek IncorporationInventors: Hung-Hsiang Chang, Te-Wang Tseng
-
Publication number: 20070047408Abstract: The invention relates to recording on a medium, and in particular, to laser control during recording data on an optical medium. A laser control method for dynamically adjusting laser power during recording data onto an optical disc comprises: recording normal data onto the optical disc according to an initial laser power; stopping recording when a trigger is generated; reading back the recorded normal data and generating a first recording quality index; recording a test pattern at a test pattern starting point according to a selected laser power; reading back the test pattern and generating a second recording quality index; and determining an adaptive laser power to continually record the normal data according to the first recording quality index and the second recording quality index.Type: ApplicationFiled: February 1, 2006Publication date: March 1, 2007Inventors: Chih-Ching Yu, Hung-Hsiang Chang, Ping-Tsai Tsai
-
Publication number: 20070047407Abstract: A recording system is provided, improving laser control when writing data on an optical recording medium. A data buffer stores data to be recorded, wherein the data is divided into first and second data units in response to a trigger signal, wherein the first data unit is followed by the second data unit. A laser controller first receives the second data unit from the data buffer, writes the second data unit to an optical disc using a write laser, reads and evaluates the recorded second data unit, adjusts characteristics of the write laser according to the evaluation, receives the first data unit from the data buffer, and writes the first data unit to the optical disc using the adjusted write laser.Type: ApplicationFiled: August 30, 2005Publication date: March 1, 2007Inventors: Hung-Hsiang Chang, Kun-Yi Chan
-
Publication number: 20050135216Abstract: A method used in an optical storage device having a pickup head. The pickup head includes an object lens, a first and a second light source. The object lens focuses the laser light generated by the first or the second light source onto a first or a second focal point. A driving control effort is used to change the location of the object lens. The method includes the following steps: providing the driving control effort to move the object lens; measuring a first parameter when the first focal point passes through a predetermined layer of an optical disc; measuring a second parameter when the second focal point passes through the predetermined layer of the optical disc; and (d) determining the relationship between the difference of object lens location and the driving control effort according to the predetermined distance, the first parameter, and the second parameter.Type: ApplicationFiled: December 1, 2004Publication date: June 23, 2005Inventors: Hung-Hsiang Chang, Fu-Shan Wang
-
Publication number: 20050073919Abstract: A method for controlling long seeking operation in an optical disc drive is provided. The optical disc drive includes a sled actuator, a pickup head installed on the sled actuator for reading and/or writing data in an optical disc, and a controller for controlling the sled actuator to move together with the pickup head. The method includes the steps of (a) receiving remaining tracks information indicating a number of tracks remained to be crossed by the sled actuator and/or the pickup head; (b) receiving velocity information indicating a velocity of the sled actuator and/or the pickup head; (c) receiving acceleration information indicating an acceleration of the sled actuator and/or the pickup head; (d) driving the sled actuator to move according to the remaining tracks information, the velocity information, and the acceleration information.Type: ApplicationFiled: October 1, 2004Publication date: April 7, 2005Inventors: Hung-Hsiang Chang, Te-Wang Tseng