• Patent Title: Display apparatus and current limiting method
  • Application No.: US17999151
    Application Date: 2021-05-17
  • Publication No.: US11893932B2
    Publication Date: 2024-02-06
  • Inventor: Toshiyuki Kato
  • Applicant: JOLED INC.
  • Applicant Address: JP Tokyo
  • Assignee: JOLED INC.
  • Current Assignee: JOLED INC.
  • Current Assignee Address: JP Tokyo
  • Agency: CHIP LAW GROUP
  • Priority: JP 20089704 2020.05.22
  • International Application: PCT/JP2021/018689 2021.05.17
  • International Announcement: WO2021/235415A 2021.11.25
  • Date entered country: 2022-11-17
  • Main IPC: G09G3/3225
  • IPC: G09G3/3225
Display apparatus and current limiting method
Abstract:
A display apparatus includes a display panel including a plurality of pixels, and a current limiting circuit that limits current consumption in the plurality of pixels, the current limiting circuit includes a gain computation circuit that computes a screen power value in reference to a pixel value included in a video signal and that determines a gain in reference to the screen power value, and a gain multiplication circuit that multiplies the pixel value by the gain and that outputs a limit signal including the pixel value multiplied by the gain, the display panel includes a display unit, and a lighting control circuit that controls a lighting state of the plurality of pixels in reference to a predicted power value computed according to the limit signal, to reduce a power consumption value in the plurality of pixels to a value equal to or smaller than a control target power value, the gain is 1 when the screen power value is equal to or smaller than the control target power value, and the gain is a value equal to or smaller than a value obtained by dividing the control target power value by the screen power value, in other cases.
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