Patents by Inventor Tae-Wook Koh
Tae-Wook Koh 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: 20240133572Abstract: The present invention relates to a system for diagnosis and management of indoor air quality, and more particularly to a system for diagnosis and management of indoor air quality which is capable of obtaining and analyzing air quality data by measuring the indoor air quality of a vehicle or accommodation space and of detecting smoking or non-smoking, the type of smoking, and an abnormal situation by diagnosing at least one of indoor smoking and smoking types. In addition, the present invention relates to a technology for facilitating the management of accommodation by efficiently diagnosing indoor air quality.Type: ApplicationFiled: November 25, 2021Publication date: April 25, 2024Applicant: AirDeep Co., Ltd.Inventors: Yoo Sin KIM, Eun Joo PARK, Jung Hoon SHIN, Tae Yun KIM, Kun Wook KOH
-
Patent number: 11688363Abstract: An electronic device may include an electronic display including display pixels to display an image based on compensated image data. The electronic display may also include a stressed reference pixel to exhibit burn-in related aging in response to one or more stress sessions and a non-stressed reference pixel configured to not undergo the one or more stress sessions. Additionally, the electronic device may include image processing circuitry to determine a panel-specific aging profile based on a comparison between one or more properties of the stressed reference pixel and the one or more properties of the non-stressed reference pixel. The image processing circuitry may also generate one or more gain maps based on the panel-specific aging profile and generate the compensated image data by applying the one or more gain maps to input image data.Type: GrantFiled: July 14, 2021Date of Patent: June 27, 2023Assignee: Apple Inc.Inventors: Maofeng Yang, Jiayi Jin, David A. Doyle, Yifan Zhang, Weijun Yao, Jiye Lee, Tae-Wook Koh, Mathew K. Mathai, Chuang Qian, Tsung-Ting Tsai, James P. Landry, Kiran S. Pillai, Injae Hwang, Yongjun Li
-
Publication number: 20220093059Abstract: An electronic device may include an electronic display including display pixels to display an image based on compensated image data. The electronic display may also include a stressed reference pixel to exhibit burn-in related aging in response to one or more stress sessions and a non-stressed reference pixel configured to not undergo the one or more stress sessions. Additionally, the electronic device may include image processing circuitry to determine a panel-specific aging profile based on a comparison between one or more properties of the stressed reference pixel and the one or more properties of the non-stressed reference pixel. The image processing circuitry may also generate one or more gain maps based on the panel-specific aging profile and generate the compensated image data by applying the one or more gain maps to input image data.Type: ApplicationFiled: July 14, 2021Publication date: March 24, 2022Inventors: Maofeng Yang, Jiayi Jin, David A. Doyle, Yifan Zhang, Weijun Yao, Jiye Lee, Tae-Wook Koh, Mathew K. Mathai, Chuang Qian, Tsung-Ting Tsai, James P. Landry, Kiran S. Pillai, Injae Hwang, Yongjun Li
-
Patent number: 11276369Abstract: Systems, methods, and devices are provided to reduce a likelihood of image burn-in on an electronic display. Such an electronic device may include image processing circuitry and an electronic display. The image processing circuitry may receive image data and analyze the image data for risk of image burn-in and, based at least in part on the analysis of the image data, reduce a risk of image burn-in at least in part by reducing a local maximum pixel luminance value in at least one of a plurality of regions of the image data over time or by reducing a dynamic range headroom of the image data. The electronic display may display the image data with a reduced risk of image burn-in on the pixels of the electronic display.Type: GrantFiled: April 9, 2018Date of Patent: March 15, 2022Assignee: Apple Inc.Inventors: Tobias Jung, Marc Albrecht, Paul S. Drzaic, Tae-Wook Koh, Teun R. Baar, Yifan Zhang, Ramin Samadani, Nicolas P. Bonnier
-
Patent number: 11171313Abstract: Display panel stack-up structures are described. In an embodiment, a display panel includes a substrate, a light source, and a multiple layer thin film encapsulation over the light source. In an embodiment, the display panel additionally includes an anti-reflection layer over the light source. In an embodiment, an incoherence layer is located within the thin film encapsulation.Type: GrantFiled: June 21, 2019Date of Patent: November 9, 2021Assignee: Apple Inc.Inventors: Yifan Zhang, Amin Salehi, Yun Liu, Paul S. Drzaic, Tae-Wook Koh, Chih Jen Yang, Bhadrinarayana Lalgudi Visweswaran, Chieh-Wei Chen
-
Patent number: 11164540Abstract: An electronic device may include an electronic display and a display pipeline. The electronic display may include multiple pixels to display images based at least in part on pixel data. The display pipeline may receive image data and process the image data to determine the pixel data. The display pipeline may include burn-in compensation circuitry to apply gains to the image data based at least in part on burn-in statistics to generate the pixel data. The gain to be applied to the image data for a pixel of the electronic display is determined by the burn-in compensation circuitry, based at least in part on an emission duty cycle of the pixel, to compensate the image data for the pixel for burn-in related aging of the pixel.Type: GrantFiled: December 11, 2019Date of Patent: November 2, 2021Assignee: Apple, Inc.Inventors: Peter F. Holland, Mahesh B. Chappalli, Yifan Zhang, Tae-Wook Koh
-
Patent number: 11145249Abstract: A display may include pixels (such as light-emitting diode pixels) that are susceptible aging effects (burn-in). To help avoid visible artifacts caused by burn-in during operation of the display, compensation circuitry may be used to compensate image data for the display. An optical sensor may be included behind the pixels to directly measure pixel brightness levels. The optical sensor may provide optical sensor data from testing operations to the compensation circuitry. The optical sensor may gather data during burn-in testing operations. During the burn-in testing operations, pixel groups including both high-usage pixels and low-usage pixels may sequentially emit light while the optical sensor gathers data. Brightness differences between the high-usage pixels and low-usage pixels may be used to characterize pixel aging in the display and compensate image data to mitigate visible artifacts caused by burn-in. The optical sensor may also gather data during global brightness testing operations.Type: GrantFiled: July 15, 2020Date of Patent: October 12, 2021Inventors: Wanglei Han, Akshay Bhat, Michael H. Lim, Kyung Hoae Koo, Jiayi Jin, David A. Doyle, Tae-Wook Koh, Jared S. Price, Yifan Zhang, Mahdi Nezamabadi
-
Publication number: 20210183333Abstract: An electronic device may include an electronic display and a display pipeline. The electronic display may include multiple pixels to display images based at least in part on pixel data. The display pipeline may receive image data and process the image data to determine the pixel data. The display pipeline may include burn-in compensation circuitry to apply gains to the image data based at least in part on burn-in statistics to generate the pixel data. The gain to be applied to the image data for a pixel of the electronic display is determined by the burn-in compensation circuitry, based at least in part on an emission duty cycle of the pixel, to compensate the image data for the pixel for burn-in related aging of the pixel.Type: ApplicationFiled: December 11, 2019Publication date: June 17, 2021Inventors: Peter F. Holland, Mahesh B. Chappalli, Yifan Zhang, Tae-Wook Koh
-
Patent number: 10991283Abstract: A flat-panel display device and method to prevent display panel burn-in through a decimated look-up table with pixel shifting in a display or an augmented reality display.Type: GrantFiled: May 3, 2019Date of Patent: April 27, 2021Assignee: Apple Inc.Inventors: Sheng Zhang, Chaohao Wang, Michael Slootsky, Yifan Zhang, Tae-Wook Koh
-
Patent number: 10983482Abstract: An electronic device such as a wristwatch device or other device may have a display. The display may be used to continuously display information such as watch face information. A watch face image on the display may contain watch face elements such as watch face hands, watch face indices, and complications. To reduce burn-in risk for watch face elements, control circuitry in the electronic device may impose burn-in constraints on attributes of the watch face elements such as peak luminance constraints, dwell time constraints, color constraints, constraints on the shape of each element, and constraints on element style. These constraints may help avoid situations in which static elements such as watch face indices create more burn-in than dynamic elements such as watch face hands.Type: GrantFiled: February 15, 2019Date of Patent: April 20, 2021Assignee: Apple Inc.Inventors: Tae-Wook Koh, Yiqiang Nie, Yifan Zhang, Giovanni M. Agnoli, Paul S. Drzaic, David A. Doyle
-
Publication number: 20200218204Abstract: An electronic device such as a wristwatch device or other device may have a display. The display may be used to continuously display information such as watch face information. A watch face image on the display may contain watch face elements such as watch face hands, watch face indices, and complications. To reduce burn-in risk for watch face elements, control circuitry in the electronic device may impose burn-in constraints on attributes of the watch face elements such as peak luminance constraints, dwell time constraints, color constraints, constraints on the shape of each element, and constraints on element style. These constraints may help avoid situations in which static elements such as watch face indices create more burn-in than dynamic elements such as watch face hands.Type: ApplicationFiled: February 15, 2019Publication date: July 9, 2020Inventors: Tae-Wook Koh, Yiqiang Nie, Yifan Zhang, Giovanni M. Agnoli, Paul S. Drzaic, David A. Doyle
-
Publication number: 20200099012Abstract: Display panel stack-up structures are described. In an embodiment, a display panel includes a substrate, a light source, and a multiple layer thin film encapsulation over the light source. In an embodiment, the display panel additionally includes an anti-reflection layer over the light source. In an embodiment, an incoherence layer is located within the thin film encapsulation.Type: ApplicationFiled: June 21, 2019Publication date: March 26, 2020Inventors: Yifan Zhang, Amin Salehi, Yun Liu, Paul S. Drzaic, Tae-Wook Koh, Chih Jen Yang, Bhadrinarayana Lalgudi Visweswaran, Chieh-Wei Chen
-
Publication number: 20200074900Abstract: A flat-panel display device and method to prevent display panel burn-in through a decimated look-up table with pixel shifting in a display or an augmented reality display.Type: ApplicationFiled: May 3, 2019Publication date: March 5, 2020Inventors: Sheng Zhang, Chaohao Wang, Michael Slootsky, Yifan Zhang, Tae-Wook Koh
-
Patent number: 10453375Abstract: A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.Type: GrantFiled: January 18, 2018Date of Patent: October 22, 2019Assignee: Apple Inc.Inventors: Paul S. Drzaic, Tae-Wook Koh, Ross Thompson, Guy Cote, Christopher P. Tann, Jerrold V. Hauck, Yifan Zhang, Jean-Pierre Guillou, Ian C. Hendry, Vanessa C. Heppolette, Arthur L. Spence
-
Patent number: 10453388Abstract: An electronic device may be provided with a display. A content generator may generate frames of image data to be displayed on the display. The display may have an array of pixels that emit light to display images. The pixels may contain light-emitting devices such as organic light-emitting diodes, quantum dot light-emitting diodes, and light-emitting diodes formed from discrete semiconductor dies. As a result of aging, the light producing capabilities of the light-emitting devices may degrade over time. The electronic device may have a temperature sensor that gathers temperature measurements and an ambient light sensor. A pixel luminance degradation compensator may apply compensation factors to uncorrected pixel luminance values associated with the frames of image data to produce corresponding corrected pixel luminance values for the display. The compensation factors may be based on aging history information such as pixel luminance history, ambient light exposure, and temperature measurements.Type: GrantFiled: April 30, 2018Date of Patent: October 22, 2019Assignee: Apple Inc.Inventors: Jiye Lee, Yifan Zhang, Chieh-Wei Chen, Tae-Wook Koh, Hongwei Chang, Paul S. Drzaic
-
Patent number: 10410569Abstract: A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.Type: GrantFiled: January 18, 2018Date of Patent: September 10, 2019Assignee: Apple Inc.Inventors: Paul S. Drzaic, Ross Thompson, Guy Cote, Christopher P. Tann, Jerrold V. Hauck, Yifan Zhang, Jean-Pierre Guillou, Ian C. Hendry, Vanessa C. Heppolette, Tae-Wook Koh, Arthur L. Spence
-
Patent number: 10410568Abstract: A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.Type: GrantFiled: January 18, 2018Date of Patent: September 10, 2019Assignee: Apple Inc.Inventors: Paul S. Drzaic, Ross Thompson, Guy Cote, Christopher P. Tann, Jerrold V. Hauck, Yifan Zhang, Jean-Pierre Guillou, Ian C. Hendry, Vanessa C. Heppolette, Tae-Wook Koh, Arthur L. Spence
-
Publication number: 20190080670Abstract: Systems, methods, and devices are provided to reduce a likelihood of image burn-in on an electronic display. Such an electronic device may include image processing circuitry and an electronic display. The image processing circuitry may receive image data and analyze the image data for risk of image burn-in and, based at least in part on the analysis of the image data, reduce a risk of image burn-in at least in part by reducing a local maximum pixel luminance value in at least one of a plurality of regions of the image data over time or by reducing a dynamic range headroom of the image data. The electronic display may display the image data with a reduced risk of image burn-in on the pixels of the electronic display.Type: ApplicationFiled: April 9, 2018Publication date: March 14, 2019Inventors: Tobias Jung, Marc Albrecht, Paul S. Drzaic, Tae-Wook Koh, Teun R. Baar, Yifan Zhang, Ramin Samadani, Nicolas P. Bonnier
-
Publication number: 20180350295Abstract: A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.Type: ApplicationFiled: January 18, 2018Publication date: December 6, 2018Inventors: PAUL S. DRZAIC, TAE-WOOK KOH, ROSS THOMPSON, GUY COTE, CHRISTOPHER P. TANN, JERROLD V. HAUCK, YIFAN ZHANG, JEAN-PIERRE GUILLOU, IAN C. HENDRY, VANESSA C. HEPPOLETTE, ARTHUR L. SPENCE
-
Publication number: 20180350289Abstract: A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.Type: ApplicationFiled: January 18, 2018Publication date: December 6, 2018Inventors: PAUL S. DRZAIC, ROSS THOMPSON, GUY COTE, CHRISTOPHER P. TANN, JERROLD V. HAUCK, YIFAN ZHANG, JEAN-PIERRE GUILLOU, IAN C. HENDRY, VANESSA C. HEPPOLETTE, TAE-WOOK KOH, ARTHUR L. SPENCE