Means to reduce OLED transient response

    公开(公告)号:US12183280B2

    公开(公告)日:2024-12-31

    申请号:US17845125

    申请日:2022-06-21

    Abstract: Embodiments of the disclosed subject matter provide a device that includes an organic light emitting device (OLED), and a drive circuit to control the operation of the OLED, comprising a response time accelerator thin film transistor (TFT) configured to short or reverse bias the OLED for a predetermined period of time during a frame time. Other embodiments include an OLED having a plurality of sub-pixels, where one or more of sub-pixels configured to emit light of at least a first color comprises a first emissive area and a second emissive area that are independently controllable, where the first emissive area is larger than the second emissive area. The controller is configured to control the second emissive area to have (i) a higher brightness, and/or (ii) a higher current density than the first emissive area for a first sub-pixel luminance level that is less than a maximum luminance.

    LIGHT EMITTING DEVICE, SYSTEM, AND METHOD

    公开(公告)号:US20240418946A1

    公开(公告)日:2024-12-19

    申请号:US18678654

    申请日:2024-05-30

    Abstract: A light emitting device comprises a waveguide, a downconverting thin-film stack in optical communication with the waveguide, and an OLED thin-film stack in optical communication with the downconverting thin-film stack. An integrated photonic system comprises the downconverted as described above, wherein the downconverted OLED stack is integrated with a silicon photonic chip or CMOS photonic chip. A method for providing pump light for a silicon photonic integrated circuit comprises providing the integrated photonic as described above, producing light via the OLED thin-film stack; downconverting the produced light via the downconverting thin-film stack, and guiding the downconverted light via the waveguide.

    ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES

    公开(公告)号:US20240415003A1

    公开(公告)日:2024-12-12

    申请号:US18657900

    申请日:2024-05-08

    Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, moiety A is a monocyclic ring or a polycyclic fused ring system, moiety B is a polycyclic fused ring system; each of Z1 to Z4 is C or N; each of K1 and K2 is a direct bond or a linker; at least one RB or RA comprises, where T is B, C, N, Si, Ge, Bi, or P; V is a direct bond or a linker; R1 and R2 are present, and R3 is optionally present; each substituent is independently hydrogen or a General Substituent defined herein; and at least two of R1, R2, and R3 has two or more carbon atoms. Formulations, OLEDs, and consumer products containing the compound are also provided.

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