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Patent Searching and Data


Title:
DISPLAY DEVICE AND CURRENT-LIMITING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/235415
Kind Code:
A1
Abstract:
This display device (10) is provided with: a display panel (60) having a plurality of pixels; and a current-limiting circuit (40) which limits the consumption current in the pixels. The current-limiting circuit (40) comprises a gain calculation circuit (42) which calculates a screen power value on the basis of a pixel value contained in a video signal and determines a gain on the basis of the calculated screen power value, and a gain multiplication circuit (42) which multiplies the pixel value by the gain and outputs a limitation signal containing the pixel value that has been multiplied by said gain. The display panel (60) comprises a display unit (70) and a lighting control circuit (66) which controls the lighting state of the respective pixels on the basis of a predicted power value calculated on the basis of the limitation signal so as to set the consumption power value in the respective pixels to a level equal to or lower than a control target power value. The gain is 1 in the case where the screen power value is not more than the control target power value, and otherwise, the gain takes a value that is not more than a value obtained by dividing the control target power value by the screen power value.

Inventors:
KATO, Toshiyuki
Application Number:
PCT/JP2021/018689
Publication Date:
November 25, 2021
Filing Date:
May 17, 2021
Export Citation:
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Assignee:
JOLED INC. (Chiyoda-ku Tokyo, 54, JP)
International Classes:
G09G3/20; G09G3/3233; G09F9/30; H01L27/32; H01L51/50
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (6F Tanaka Ito Pia Shin-Osaka Bldg., 3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-cit, Osaka 11, JP)
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