Novatek Microelectronics has been granted a patent for a method to drive OLED display panels. The method involves receiving input gray levels, mapping them to current indices, and generating compensation values to adjust voltage and gray levels for red, green, and blue subpixels, enhancing display performance. GlobalData’s report on Novatek Microelectronics gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Novatek Microelectronics, Adaptive video coding was a key innovation area identified from patents. Novatek Microelectronics's grant share as of July 2024 was 60%. Grant share is based on the ratio of number of grants to total number of patents.
Oled display driving method with voltage and gray level compensation
The patent US12073797B1 outlines a novel driving method for organic light-emitting diode (OLED) display panels, focusing on optimizing the display's performance based on input gray levels for red, green, and blue subpixels. The method involves several steps, including mapping input gray levels to current indices, calculating a representative current index, and comparing it to a predefined current index threshold. If the representative current index is found to be lower than this threshold, the method generates a voltage compensation value to adjust the initial voltage level used during the OLED's initial phase. Additionally, gray level compensation values are produced to modify the input gray levels for the subpixels accordingly.
The claims further detail the method's adaptability based on the representative current index's relationship to the threshold. If the index exceeds the threshold, gray level compensation values are generated without altering the initial voltage level. The method also incorporates frame rate considerations, ensuring that both voltage and gray level compensation values are adjusted in correlation with the frame rate when the representative current index is below the threshold. The driving method is executed by a timing controller, which receives input from an application processor or system-on-chip, and the adjusted gray levels are sent to a data driver for voltage application to the subpixels. The patent also specifies how the current index threshold is determined using historical gray levels and their corresponding current indices, enhancing the method's efficiency in managing OLED display performance.
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