US5473453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display with opaque film formed by exposure through microlens
Assignee: Canon Inc
•
Filing: 1993-05-11
•
Granted: 1995-12-05
•
Expires: 2013-05-11
Abstract
Abstract A photomask (5) of a liquid crystal display panel is formed by photolithographic exposure of a photosensitive resin layer through micro-lenses (3), and the apertures thereof are in complete alignment with condensed light through the micro-lenses, so that unnecessary light, such as strayed light, can be effectively masked. The liquid crystal display panel thus formed is provided with an increased effective aperture rate and suitable for a clearer image display.
Inventors
- 👤 Katsumi Kurematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:08
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70383; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/133526; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A liquid crystal display panel, comprising: a first glass plate having a first surface provided with an array of micro-lenses and a second flat surface provided thereon with a patterned layer of photomasks, which has been formed by forming a photosensitive resin layer on the second flat surface and exposing the photosensitive layer to light incident from the first surface side, thereby removing the portions of the photosensitive layer having received light focused through the micro-lenses to form light-transmitting portions while leaving the remaining portions as the photomasks, a second glass plate oppositely disposed with a prescribed spacing from the first glass plate and provided with thin film transistors oriented opposite to and in alignment with the photomasks on the first glass plate; and a liquid crystal disposed between the first and second substrates.
Claim 2
Dependent Claim
134 words
A liquid crystal display panel, comprising: a first glass plate having a first surface provided with an array of micro-lenses and a second flat surface provided thereon with a patterned layer of photomasks, which has been formed by forming a photosensitive resin layer on the second flat surface and exposing the photosensitive layer to light incident from the first surface side, thereby removing the portions of the photosensitive layer having received light focused through the micro-lenses to form light-transmitting portions while leaving the remaining portions as the photomasks, a second glass plate oppositely disposed with a prescribed spacing from the first glass plate and provided with thin film transistors oriented opposite to and in alignment with the photomasks on the first glass plate; and a liquid crystal disposed between the first and second substrates.
References Cited (Backward Citations)
US3744878A
Cited
JPS57157215A
Cited
JPS6026213A
Cited
US4981340A
Cited
US4790632A
Cited
EP0309948A2
Cited
JPH021816A
Cited
US4952026A
Cited
US5227900A
Cited
JPH04129268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-04 | 1999-06-05 | 1999-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-04 | 2003-06-05 | 2003-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-04 | 2007-06-05 | 2007-12-05 | $7700.00 | Window Closed / Lapsed |