Display element, polarizing plate, and display apparatus and projecting apparatus using the display element and polarizing plate
AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Kodama, Atsushi Okuyama
Life of this patent
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Abstract
This invention provides a liquid crystal display apparatus which can reduce thermal load on a polarizing plate or display element, decrease the number of components necessary for reducing the thermal load on the polarizing plate, and reduce cost by decreasing the power consumption of a cooling fan. The display apparatus has a unit for changing the color purity of at least one of a puerility of colors. A polarizing plate in the optical path of light whose color purity is changed by the color purity changing unit is formed from a heat-transfer transparent substrate having a thermal conductivity of 1.2 W/(m·K) or more.
Claims67
A display apparatus for forming a color image by illuminating one or a plurality of display elements with light from a light source and modulating a plurality of color light components having different colors by the display elements, comprising:
- means for changing a color purity of at least one of the plurality of color light components;
- and
- a polarizing plate having a transparent substrate including a material having a thermal conductivity higher than 2 W (m·K), said polarizing plate being provided only in an optical path of the light component whose color purity is changed by said color purity changing means.
A display apparatus for forming a color image by illuminating one or a plurality of display elements with light from a light source and modulating a plurality of color light components having different colors by the display elements, comprising:
- means for changing a color purity of at least one of the plurality of color light components,
- wherein one of the one or plurality of display element having a transparent substrate essentially made of a material having a thermal conductivity higher than 2 W (m·K), said one display element being provided only in an optical path of the light component whose color purity is changed by said color purity changing means.
A display element comprising:
- a driving section for driving said display element, and
- a fluorite substrate integrated with the display element.
A display apparatus comprising:
- a display element including a driving section for driving said display element and a fluorite substrate integrated with the display element;
- and
- an optical system for illuminating the display element with light from a light source.
A display apparatus for forming a color image by illuminating a plurality of display elements with light from a light source and modulating a plurality of color light components having different colors by the display elements, comprising:
- means for changing a color purity of at least one of the plurality of color light components;
- and
- a polarizing plate having a transparent substrate including a material having a thermal conductivity higher than 2 W (m·K), said polarizing plate being provided in an optical path of the light component whose color purity is changed by said color purity changing means.
A display apparatus for forming a color image by illuminating one or a plurality of display elements with light from a light source and modulating a plurality of color light components having different colors by the display elements, comprising:
- means for changing a color purity of at least one of the plurality of color light components,
- wherein one of the one or plurality of display element having a transparent substrate essentially made of a material having a thermal conductivity higher than 2 W (m·K), said one display element being provided in an optical path of the light component whose color purity is changed by said color purity changing means.
Dependencies are inferred from the claim text.