Title:
ディスプレイユニット及びディスプレイユニットの作動方法
Document Type and Number:
Japanese Patent JP7030180
Kind Code:
B2
Abstract:
There is a need for a variable lighting device (e.g. a wake-up lamp) which can display data (e.g. the time) independently of lamp illumination and in which the display is seamlessly integrated into the lamp. A first light source (106) with a first back polariser (108) and a second light source (110) with a second back polariser (112) (these have orthogonal transmission axes) are provided behind an LC-panel (104). The front polariser (114) has the same polarisation orientation as the first back polariser and may be integrated into the translucent lamp housing (122). When the first light source is on, the display produces a positive image; when the second light source is on, a negative image is produced. Light from the first light source cannot pass through the second back polariser and vice versa. However, polarised light from either light source can illuminate the whole panel.
More Like This:
| JPH09281497 | LIQUID CRYSTAL DISPLAY DEVICE |
| JP3807503 | LIQUID CRYSTAL DISPLAY AND ELECTRONIC DEVICE |
| JP3624577 | BACK LIGHT DEVICE |
Inventors:
Zeinstra, Michelle Hans
Application Number:
JP2020503320A
Publication Date:
March 04, 2022
Filing Date:
July 23, 2018
Export Citation:
Assignee:
Koninklijke Philips N.V.
International Classes:
G02F1/1335; G02F1/133; G02F1/13357
Domestic Patent References:
| JP2018097233A | ||||
| JP2004233888A | ||||
| JP2006023614A | ||||
| JP9265087A | ||||
| JP6342268A |
Foreign References:
| US4838661 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki