The invention relates to a lighting device for a display screen, which can be operated in at least two operating modes, i.e., an operating mode B1 corresponding to a free viewing mode and an operating mode B2 corresponding to a limited viewing mode, the lighting device comprising: a backlighting element extending in a planar manner, the backlighting element radiating light into a limited angular range; a plate-shaped light guide located in front of the backlight illumination in the viewing direction, the light guide having coupling-out elements on at least one of the large surfaces and/or within the body of the light guide itself, the light guide being transparent for at least 70% of the light emitted by the backlight illumination; the invention relates to a backlight lighting device comprising a light guide and a lighting means arranged laterally on a narrow edge of the light guide, different parameters being specified for the number of coupling-out elements per unit area and for the extension thereof, and in an operating mode B2, the backlight lighting means being switched on and the lighting means being switched off, and in an operating mode B1, at least the lighting means being switched on.
本发明涉及一种用于显示屏的照明装置,显示屏能够在对应自由看视模式的运行方式B1和对应受限看视模式的运行方式B2的至少两种运行方式下运行,照明装置包括:呈面状伸展的背光照明件,背光照明件将光辐射到受限的角度范围内;沿看视方向处在背光照明件前面的、板状的光导,光导在大面中的至少一个上和/或在自身的形体内部具有耦合输出元件,光导针对由背光照明件发出的光的至少70%是透明的;沿侧向布置在光导的窄边上的照明机构,其中,针对耦合输出元件在其每单位面积的数量方面以及在其伸展方面,规定出不同的参数,并且在运行方式B2下,背光照明件接通,照明机构断开,在运行方式B1下,至少接通照明机构。
Display screen with free viewing mode and restricted viewing mode
具有自由看视模式和受限看视模式的显示屏
22.10.2024
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... / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS |
SCREEN FOR A FREE VIEWING MODE AND A RESTRICTED VIEWING MODE
Europäisches Patentamt | 2024
|Large-screen display improves viewing angles
British Library Online Contents | 1996