GB1464875A - Electrical measuring instrument hav8ng a liquid crystal display - Google Patents

Electrical measuring instrument hav8ng a liquid crystal display

Info

Publication number
GB1464875A
GB1464875A GB2251073A GB2251073A GB1464875A GB 1464875 A GB1464875 A GB 1464875A GB 2251073 A GB2251073 A GB 2251073A GB 2251073 A GB2251073 A GB 2251073A GB 1464875 A GB1464875 A GB 1464875A
Authority
GB
United Kingdom
Prior art keywords
light
housing
multimeter
liquid crystal
crystal display
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
GB2251073A
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.)
Gemalto Terminals Ltd
Original Assignee
Solartron Electronic Group Ltd
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
Application filed by Solartron Electronic Group Ltd filed Critical Solartron Electronic Group Ltd
Priority to GB2251073A priority Critical patent/GB1464875A/en
Priority to FR7415871A priority patent/FR2229107B1/fr
Publication of GB1464875A publication Critical patent/GB1464875A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • 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
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/02—Function characteristic reflective

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Electric Clocks (AREA)

Abstract

1464875 Multimeter SOLARTRON ELECTRONIC GROUP Ltd 1 May 1974 [11 May 1973] 22510/73 Heading G1U [Also in Divisions G3, G4 and G5] The housing of an electrical measuring instrument e.g. a multimeter or clock contains a liquid crystal display device 36, means 44, for admitting light into the interior of the housing and a reflector 48 for directing the light out through the device. In a digital multimeter light enters the housing through a frosted, reeded or opaline window 44 and is reflected to the device by a white member 48. Light may enter though an aperture and be directed by light guides. The arrangement avoids providing a light source powered by the battery 37. However for use in low ambient light conditions a lamp powered by a different battery and controlled by a photo-electric device may be provided. Alternatively a separate light source may be secured over the window 44. The multimeter includes an automatically controlled input alternator 22, anode selector circuit 24 and an analogue to digital converter 30 whose output is applied to an amplifier driving the display device. Elements 30, 34 may form an integrated circuit. The housing may alternatively contain a digital clock or counter/timer.
GB2251073A 1973-05-11 1973-05-11 Electrical measuring instrument hav8ng a liquid crystal display Expired GB1464875A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2251073A GB1464875A (en) 1973-05-11 1973-05-11 Electrical measuring instrument hav8ng a liquid crystal display
FR7415871A FR2229107B1 (en) 1973-05-11 1974-05-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2251073A GB1464875A (en) 1973-05-11 1973-05-11 Electrical measuring instrument hav8ng a liquid crystal display

Publications (1)

Publication Number Publication Date
GB1464875A true GB1464875A (en) 1977-02-16

Family

ID=10180547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2251073A Expired GB1464875A (en) 1973-05-11 1973-05-11 Electrical measuring instrument hav8ng a liquid crystal display

Country Status (2)

Country Link
FR (1) FR2229107B1 (en)
GB (1) GB1464875A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117288A1 (en) * 1980-12-11 1982-06-16 Nintendo Co. Ltd., Kyoto VIEW DISPLAY
GB2184573A (en) * 1985-12-20 1987-06-24 Veglia Borletti Srl A dashboard clock
EP2370853A2 (en) * 2008-12-08 2011-10-05 3M Innovative Properties Company Passive and hybrid daylight-coupled backlights for sunlight viewable displays
CN102667585A (en) * 2009-11-18 2012-09-12 3M创新有限公司 Passive daylight-coupled backlight with turning film having prisms with chaos for sunlight viewable displays

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5622468A (en) * 1979-08-01 1981-03-03 Nissan Motor Liquid crystal display unit
CN109059986A (en) * 2018-07-02 2018-12-21 铜陵百锐设备配件有限公司 It is a kind of to place the instrument maintenance detection device stablized convenient for observation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2238429B2 (en) * 1971-08-11 1976-01-08 Ing. C. Olivetti & C., S.P.A., Ivrea, Turin (Italien) Multiplex control circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3117288A1 (en) * 1980-12-11 1982-06-16 Nintendo Co. Ltd., Kyoto VIEW DISPLAY
US4568080A (en) * 1980-12-11 1986-02-04 Nintendo Co., Ltd. Display apparatus
GB2184573A (en) * 1985-12-20 1987-06-24 Veglia Borletti Srl A dashboard clock
GB2184573B (en) * 1985-12-20 1989-10-25 Veglia Borletti Srl A dashboard clock
EP2370853A2 (en) * 2008-12-08 2011-10-05 3M Innovative Properties Company Passive and hybrid daylight-coupled backlights for sunlight viewable displays
EP2370853A4 (en) * 2008-12-08 2012-06-20 3M Innovative Properties Co Passive and hybrid daylight-coupled backlights for sunlight viewable displays
CN102667585A (en) * 2009-11-18 2012-09-12 3M创新有限公司 Passive daylight-coupled backlight with turning film having prisms with chaos for sunlight viewable displays

Also Published As

Publication number Publication date
FR2229107B1 (en) 1977-03-11
FR2229107A1 (en) 1974-12-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee