TCL Technology Group has been granted a patent for an OLED display panel that reduces the use of color filter materials and prevents solvent volatilization. The innovative photoresist structure of the color filter layer allows for more efficient and environmentally friendly display devices. GlobalData’s report on TCL Technology Group 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 TCL Technology Group, H2 storage carbon nanotubes was a key innovation area identified from patents. TCL Technology Group's grant share as of February 2024 was 31%. Grant share is based on the ratio of number of grants to total number of patents.

Patent granted for oled display panel with improved color filter

Source: United States Patent and Trademark Office (USPTO). Credit: TCL Technology Group Corp

A recently granted patent (Publication Number: US11925090B2) discloses an organic light emitting diode (OLED) display panel with a unique color filter layer design. The panel includes an array layer, an organic light emitting layer with at least one light emitting unit, and a color filter layer with a photoresist structure and color resist units. The photoresist structure consists of a first defining layer with a first color resist defining area and a second defining layer with a larger second color resist defining area, both having the same shape and being concentric. The color resist unit is positioned between these areas and corresponds to the light emitting unit.

Furthermore, the patent details the materials used in the first and second defining layers, which can comprise black matrix (BM) material or a combination of BM material in the first layer and an overcoat (OC) material in the second layer. The design allows for precise control over the exposure of the materials during the manufacturing process, ensuring optimal performance of the OLED display panel. The patent also covers the formation of the defining layers through a halftone process using one mask, providing a cost-effective and efficient production method for these advanced display panels. Overall, this patented technology aims to enhance the color accuracy and efficiency of OLED display panels, offering a promising solution for future display devices.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.