BACK LIT ELECTRONIC VIEWFINDER

A video camera recorder (10) is provided with a liquid crystal display viewfinder (50) for displaying camera image information, illuminated partly by ambient light (A) and having a control for varying an intensity of illumination to maintain a predetermined luminous intensity and/or color balance. A...

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Bibliographische Detailangaben
Hauptverfasser:	JOHN HERBERT STEVENS, FRANCIS ARTHUR DAVENPORT
Format:	Patent
Sprache:	eng ; spa
Schlagworte:	ACCESSORIES THEREFOR ADVERTISING APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CINEMATOGRAPHY CRYPTOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY FREQUENCY-CHANGING HOLOGRAPHY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SEALS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	A video camera recorder (10) is provided with a liquid crystal display viewfinder (50) for displaying camera image information, illuminated partly by ambient light (A) and having a control for varying an intensity of illumination to maintain a predetermined luminous intensity and/or color balance. A sensor that can include the camera image collection circuits, senses intensity or color temperature of the ambient light (A) or light emitted by the illuminated display (LCD), and is coupled to a controller (99) that varies the intensity of one or more supplemental light sources (D1, D2) such as LEDs. In a backlighted embodiment, the ambient light (A) and the supplemental light (SUP) are collimated and directed toward the viewer. The ambient light (A) also can be attenuated, to maintain one or both of a predetermined luminous intensity and a predetermined color balance or color temperature of the light emitted from the display (LCD), while minimizing power consumption. Una cámara grabadora de video (10) está provista con un visor de despliegue de cristal líquido (50) para desplegar informacion de imagen de cámara, iluminado parcialmente por luz ambiental (A) y que tiene un control para variar una intensidad de iluminacion para mantener una intensidad luminosa previamente determinada y/o balance de color. Un sensor que puede incluir circuitos de recoleccion de imagen de la cámara, capta la intensidad o la temperatura del color de la luz ambiental (A) o emitida por la luz por el despliegue iluminado (LCD), y se acopla a un controlador (99) que varia la intensidad de una o más fuentes de luz suplementadas (D1, D2) como LED. En una modalidad iluminada a contraluz, la luz ambiental (A) y la luz suplementaria (SUP) se coliman y dirigen hacia el espectador. La luz ambiental (A) también se puede atenuar, para mantener una o ambas de una intensidad luminosa previamente determinada y un balance de color previamente determinado o temperatura de color de la luz emitida desde el despliegue (LCD), al mismo tiempo que se minimiza el consumo de energía.