公开(公告)号：US20190335081A1

公开(公告)日：2019-10-31

申请号：US16040400

申请日：2018-07-19

Applicant: Apple Inc.

Inventor： Teun R. BAAR ,  Nicolas P. BONNIER ,  Adria FORES HERRANZ ,  Mahesh B. CHAPPALLI

IPC: H04N5/235 ,  H04N5/57 ,  H04N7/01

Abstract: Aspects of the subject technology relate to display circuitry for displaying both standard dynamic range (SDR) and high dynamic range (HDR) content with an HDR display. The subject technology provides a headroom-based transfer function that maintains the contrast of the SDR content whether the display is operated in the SDR or HDR mode.

公开(公告)号：US20190318696A1

公开(公告)日：2019-10-17

申请号：US16044408

申请日：2018-07-24

Applicant: Apple Inc.

Inventor： Francisco H. IMAI ,  Chi ZHANG ,  Adria FORES HERRANZ ,  Jiaying WU ,  Arthur L. SPENCE ,  Marc ALBRECHT

IPC: G09G3/34 ,  G09G3/20

Abstract: Aspects of the subject technology relate to electronic devices with displays and ambient light sensors. An electronic device modifies the color of images to be displayed based on measured ambient light color. The modification is performed in a perceptually uniform color space and includes a determination of a bleaching effect of reflected ambient light, and a determination of a color correction factor to be applied within the perceptually uniform color space,7 based on the determined bleaching effect. The modification may also include an application of a strength factor that mitigates out-of-gamut colors in color compensated images.