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US 2026/0254938 A1Published application
Display with Spread Spectrum Driven Tint Layer
AssigneeApple Inc.
InventorsYoungbae Son, Shengchang Cai
Life of this patent
Estimating the term…
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AssigneeApple Inc.
InventorsYoungbae Son, Shengchang Cai
Estimating the term…
A display may include a waveguide that propagates image light. An optical coupler may redirect the image light towards an eye box. A tint layer may transmit environmental light to the eye box through the coupler. A driver may supply a drive signal to the tint layer that places the tint layer in a steady state. The drive signal may include a binary square wave at a first frequency. The driver may vary the first frequency over time while the tint layer is in the steady state. The driver may vary the first frequency through a set of N different frequencies over time randomly or according to a predetermined schedule. Varying the first frequency may serve to mitigate flickering in the environmental light transmitted by the tint layer, such as in situations where the environmental light includes intensity modulations at a second frequency susceptible to beating with the first frequency.
A head-mounted display device comprising:
A method of operating a display comprising:
An electronic device comprising:
Dependencies are inferred from the claim text.