FR1475739A - bright display with automatic local luminance control - Google Patents

bright display with automatic local luminance control

Info

Publication number
FR1475739A
FR1475739A FR45996A FR45996A FR1475739A FR 1475739 A FR1475739 A FR 1475739A FR 45996 A FR45996 A FR 45996A FR 45996 A FR45996 A FR 45996A FR 1475739 A FR1475739 A FR 1475739A
Authority
FR
France
Prior art keywords
luminance control
bright display
local luminance
automatic local
automatic
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
FR45996A
Other languages
French (fr)
Inventor
Jean Bajon
Jacqueline Pons
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 filed Critical
Priority to FR45996A priority Critical patent/FR1475739A/en
Application granted granted Critical
Publication of FR1475739A publication Critical patent/FR1475739A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/725—Optical projection devices wherein the contrast is controlled electrically (e.g. cathode ray tube masking)

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
FR45996A 1966-01-14 1966-01-14 bright display with automatic local luminance control Expired FR1475739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR45996A FR1475739A (en) 1966-01-14 1966-01-14 bright display with automatic local luminance control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR45996A FR1475739A (en) 1966-01-14 1966-01-14 bright display with automatic local luminance control

Publications (1)

Publication Number Publication Date
FR1475739A true FR1475739A (en) 1967-04-07

Family

ID=1584693

Family Applications (1)

Application Number Title Priority Date Filing Date
FR45996A Expired FR1475739A (en) 1966-01-14 1966-01-14 bright display with automatic local luminance control

Country Status (1)

Country Link
FR (1) FR1475739A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162528A1 (en) * 1984-05-18 1985-11-27 B.V. Optische Industrie "De Oude Delft" Light box for providing a background illumination having brightness values locally adjusted to the density of a transparency to be viewed by means of the light box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162528A1 (en) * 1984-05-18 1985-11-27 B.V. Optische Industrie "De Oude Delft" Light box for providing a background illumination having brightness values locally adjusted to the density of a transparency to be viewed by means of the light box

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