Display unit, display method, and display instrument employing the same
US6816313B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Feb 26, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display unit is provided which enables monocular observation of a magnified displayed image, and binocular observation of a non-magnified displayed image. The display unit comprises a liquid crystal display element having pixels arranged two-dimensionally, and a backlight source for illuminating the liquid crystal display element from the backside. The backlight source comprises a micro-spotlight illumination system constituted of a surface light source, a barrier element, and a microlenses. The barrier element is controlled to take a complete transmission mode to transmit the light emitted form the surface light source or an aperture-formation mode to form apertures in matrix arrangement. In the aperture formation mode, the microlenses are focused substantially on the apertures respectively. The apertures, the microlenses corresponding thereto, and the pixels corresponding thereto are arranged such that the optical axes of the respective micro-spotlight illumination system pass through the pixels of the corresponding liquid crystal display elements from the backside and come to intercross roughly at one point on a pupil of an eye E brought close to the display face of the liquid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.