US4068924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light collector means for irradiating a liquid crystal display device
Assignee: Sharp Corp
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Filing: 1976-03-03
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Granted: 1978-01-17
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Expires: 1996-03-03
Abstract
Abstract A light collector means such as a focusing lens is provided adjacent to a liquid crystal display device for irradiating the liquid crystal display device. In an electronic apparatus such as an electronic calculator or an electronic timepiece including a tiltable, shielding hood structure slidably mounted on the housing of the electronic apparatus above the liquid crystal display device, the light collector means is preferably positioned at the end of the hood structure.
Inventors
- 👤 Yasuhiro Kotani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:11
CPC Classifications
G; G09; G09F; G09F9/00; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133526; G06; G06F; G06F15/00; G06F15/02; G06F15/0216
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
In a housing for an electronic calculator including a calculator body having an upper surface provided with a keyboard section and an indication section of the liquid crystal type, and a shielding hood structure mounted on the end portion of the upper surface of said calculator body adjacent said indication section, said shielding hood having a lowermost end portion adjacent said calculator body and extending to an upper end portion positioned above said indication section, the improvement comprising: a light collector means mounted at said upper end of said shielding hood structure for refracting light beams introduced therein toward said indication section.
Claim 2
Dependent Claim
102 words
In a housing for an electronic calculator including a calculator body having an upper surface provided with a keyboard section and an indication section of the liquid crystal type, and a shielding hood structure mounted on the end portion of the upper surface of said calculator body adjacent said indication section, said shielding hood having a lowermost end portion adjacent said calculator body and extending to an upper end portion positioned above said indication section, the improvement comprising: a light collector means mounted at said upper end of said shielding hood structure for refracting light beams introduced therein toward said indication section.
Claim 3
Dependent Claim
30 words
The housing for an electronic calculator of claim 1, wherein the light collector means is a transparent round bar transversely mounted at the upper end of the shielding hood structure.
Claim 4
Dependent Claim
19 words
The housing for an electronic calculator of claim 2, wherein the transparent round bar is made of acrylic resin.
Claim 5
Dependent Claim
34 words
The housing for an electronic calculator of claim 2, wherein the shielding hood structure comprises: a transparent flat plate; and a reflection film attached to the display adjacent surface of the transparent flat plate.
Claim 6
Dependent Claim
38 words
The housing for an electronic calculator of claim 4, wherein the transparent round bar is integral with the transparent flat plate; and which further comprises a black cloth adhered to the display adjacent surface of the reflection film.
Claim 7
Dependent Claim
25 words
The housing for an electronic calculator of claim 5, wherein the reflection film is made of aluminum and formed through the use of evaporation technique.
Claim 8
Dependent Claim
24 words
The housing for an electronic calculator of claim 5, wherein said transparent round bar and said transparent flat plate are made of acrylic resin.
Claim 9
Dependent Claim
21 words
The housing for an electronic calculator of claim 4, wherein the transparent round bar is integral with the transparent flat plate.
Claim 10
Dependent Claim
25 words
The housing for an electronic calculator of claim 4, which further comprises a black cloth adhered to the display adjacent surface of the reflector film.
Claim 11
Dependent Claim
25 words
The housing for an electronic calculator of claim 4, wherein the reflection film is made of aluminum and formed through the use of evaporation technique.
Claim 12
Dependent Claim
29 words
The housing for an electronic calculator of claim 2, wherein the shielding hood structure is tiltable from an open position to a closed position above only said indication section.
Claim 13
Dependent Claim
39 words
The housing for an electronic calculator of claim 11, wherein the transparent round bar is extended from the side edge of the tiltable, shielding hood structure, thereby facilitating the opening and closing operation of the tiltable, shielding hood structure.
Claim 14
Dependent Claim
28 words
The housing for an electronic calculator of claim 1, wherein the indication section is made of a dynamic scattering mode liquid crystal display device of the reflection type.
Claim 15
Dependent Claim
29 words
The housing for an electronic calculator of claim 14, wherein the shielding hood structure is tiltable from an open position to a closed position above only said indication section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |