The invention relates to a reflective optical stack for a peep-proof display device. The invention provides a peep-proof display device. The peep-proof display device comprises a polarized output spatial light modulator, a reflective polarizer, a plurality of polarity control delayers and a polarizer. In a peep-proof mode of operation, coaxial light from the spatial light modulator is conducted without loss, but off-axis light has reduced brightness. In addition, the reflectivity of the display device is reduced for coaxial reflection of ambient light, and the reflectivity is improved for off-axis light. The visibility of the display device to off-axis snoopers is reduced by reducing the brightness and improving the front reflectivity of ambient light. Liquid crystal phase delay is adjusted in a public mode of operation, thus not modifying off-axis brightness and reflectivity.
本发明涉及用于防窥显示装置的反射式光学堆叠物。本发明提供一种防窥显示装置包括极化输出空间光调制器、反射式偏振器、多个极性控制延迟器和偏振器。在防窥操作模式下,传导来自所述空间光调制器的同轴光而没有损耗,然而偏轴光具有经降低的亮度。此外,针对环境光的同轴反射而降低显示装置反射率,同时针对偏轴光而提高反射率。通过降低亮度并提高对环境光的正面反射率,降低所述显示装置对偏轴窥探者的可视性。在公开操作模式下调整液晶相位延迟,因此未修改偏轴亮度和反射率。
Reflective optical stack for peep-proof display device
用于防窥显示装置的反射式光学堆叠物
2023-02-28
Patent
Elektronische Ressource
Chinesisch
IPC: | G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING,... , Vorrichtungen oder Anordnungen, deren optische Arbeitsweise durch Änderung der optischen Eigenschaften des Mediums der Vorrichtungen oder Anordnungen geändert wird zum Steuern der Intensität, Farbe, Phase, Polarisation oder der Richtung von... / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS |
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