GB1444182A - Hood structure for electronic calculators - Google Patents

Hood structure for electronic calculators

Info

Publication number
GB1444182A
GB1444182A GB3401673A GB3401673A GB1444182A GB 1444182 A GB1444182 A GB 1444182A GB 3401673 A GB3401673 A GB 3401673A GB 3401673 A GB3401673 A GB 3401673A GB 1444182 A GB1444182 A GB 1444182A
Authority
GB
United Kingdom
Prior art keywords
display
hood structure
electronic calculators
july
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3401673A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP8418272U external-priority patent/JPS536376Y2/ja
Priority claimed from JP1973043244U external-priority patent/JPS548651Y2/ja
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of GB1444182A publication Critical patent/GB1444182A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133311—Environmental protection, e.g. against dust or humidity
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133618—Illuminating devices for ambient light

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Calculators And Similar Devices (AREA)
GB3401673A 1972-07-17 1973-07-17 Hood structure for electronic calculators Expired GB1444182A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8418272U JPS536376Y2 (cg-RX-API-DMAC7.html) 1972-07-17 1972-07-17
JP1973043244U JPS548651Y2 (cg-RX-API-DMAC7.html) 1973-04-11 1973-04-11

Publications (1)

Publication Number Publication Date
GB1444182A true GB1444182A (en) 1976-07-28

Family

ID=26382996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3401673A Expired GB1444182A (en) 1972-07-17 1973-07-17 Hood structure for electronic calculators

Country Status (4)

Country Link
US (1) US3986014A (cg-RX-API-DMAC7.html)
CA (1) CA1005920A (cg-RX-API-DMAC7.html)
FR (1) FR2193514A5 (cg-RX-API-DMAC7.html)
GB (1) GB1444182A (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012125A3 (en) * 1978-12-01 1980-12-10 Rolf Häggbom A device for eliminating disturbing reflection in a display screen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068924A (en) * 1975-03-04 1978-01-17 Sharp Kabushiki Kaisha Light collector means for irradiating a liquid crystal display device
US4235523A (en) * 1979-02-23 1980-11-25 Digicourse Inc. Controlled reflection readout for displays
USD273118S (en) 1981-06-02 1984-03-20 Canon Kabushiki Kaisha Desk-top electronic calculator
USD284285S (en) 1982-09-14 1986-06-17 Telefonaktiebolaget Lm Ericsson Keyboard
AU578090B2 (en) * 1984-04-24 1988-10-13 Sony Corporation Display system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763855A (en) * 1950-01-03 1956-09-18 Daimler Benz Ag Shielded signal
US3257507A (en) * 1963-11-26 1966-06-21 Gen Precision Inc Adjustable viewing hood
US3499112A (en) * 1967-03-31 1970-03-03 Rca Corp Electro-optical device
US3613351A (en) * 1969-05-13 1971-10-19 Hamilton Watch Co Wristwatch with liquid crystal display
US3781865A (en) * 1969-06-21 1973-12-25 Suwa Seikosha Kk Display device for electronic desk calculator
US3647285A (en) * 1970-06-10 1972-03-07 Ford Motor Co Glass window structures eliminating jamin interference fringes
US3881807A (en) * 1970-11-12 1975-05-06 Suwa Seikosha Kk Liquid crystal display for small-sized electronic calculator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012125A3 (en) * 1978-12-01 1980-12-10 Rolf Häggbom A device for eliminating disturbing reflection in a display screen

Also Published As

Publication number Publication date
DE2336412B2 (de) 1976-01-15
US3986014A (en) 1976-10-12
FR2193514A5 (cg-RX-API-DMAC7.html) 1974-02-15
DE2336412A1 (de) 1974-01-31
CA1005920A (en) 1977-02-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930716