A display apparatus includes a liquid crystal panel; light sources configured to emit blue light; a reflective sheet including four edge portions and a first hole and a second hole on each of the four edge portions of the reflective sheet, the first hole disposed at a first distance from an edge of the reflective sheet, and the second hole disposed at a second distance from the edge of the reflective sheet, wherein the second distance is greater than the first distance; and first and second light conversion dots, wherein the first light conversion dots are disposed around the first hole of the reflective sheet, and the second light conversion dots are disposed around the second hole of the reflective sheet, wherein a size of each of the first light conversion dots is greater than a size of each of the second light conversion dots.

The present invention provides an electrochromic polyamic acid material, a preparation method thereof and a display device, wherein the molecular structure of the electrochromic polyamic acid material includes oligoaniline and carbazolyl triphenylamine. The oligoaniline serves as an electrochemically sensitive group, and the carbazolyl triphenylamine serves as a fluorescence emitting group. The electrochromic polyamic acid material is an electrically controlled fluorescent polymer. Fluorescence intensity of the electrochromic polyamic acid material undergoes reversible fluorescence conversion with a change of an applied voltage, due to a redox reaction of the oligoaniline at different voltages, resulting in an interchange between a benzene ring and an anthracene ring in a molecular structure, and an electron/energy transfer path with the fluorescence emitting group are generated or eliminated, thereby realizing the electrically controlled fluorescent properties of the electrochromic polyamic acid material.

A display apparatus includes a liquid crystal panel; light sources configured to emit blue light; a reflective sheet including a first edge portion and a second edge portion, wherein a plurality of holes are disposed on the reflective sheet, the plurality of holes includes a first hole, a second hole, and a third hole, the first hole is disposed at a first distance from an edge of the first edge portion, the second hole is disposed at a second distance from the edge of the first edge portion, and the third hole is disposed at the first distance from the edge of the first edge portion, wherein the second distance is greater than the first distance; and pluralities of light conversion dots disposed around the first, second, and third holes, respectively, wherein the third hole is disposed on an overlap portion of the first and second edge portions.

Disclosed is a high quality display device which avoids complicated element structure, and does not unnecessarily reduce portability. The display device comprises: a pair of substrates which are disposed facing each other, and on each of which electrodes are formed; and a material layer which is sandwiched between the pair of substrates. The material layer contains: a coloring material which changes color upon the application of a voltage; and a light-emitting material which emits light upon photoexcitation.

An optical switching device comprising a polarisation layer and a switching layer which comprises a liquid-crystalline material and a dye compound. Use of the optical switching device for the regulation of the passage of light through an area element. A window element which has the optical switching device therein.

A display system comprises light sources configured to emit first light with a first spectral power distribution; light regeneration layers configured to be stimulated by the first light and to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to primary colors and (b) secondary spectral components that do not correspond to the primary colors; and notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light. The portion of the second light can be directed to a viewer of the display system and configured to render images viewable to the viewer.

A display apparatus includes a liquid crystal panel; light sources configured to emit blue light; a reflective sheet including four edge portions and a first hole and a second hole on each of the four edge portions of the reflective sheet, the first hole disposed at a first distance from an edge of the reflective sheet, and the second hole disposed at a second distance from the edge of the reflective sheet, wherein the second distance is greater than the first distance; and first and second light conversion dots, wherein the first light conversion dots are disposed around the first hole of the reflective sheet, and the second light conversion dots are disposed around the second hole of the reflective sheet, wherein a size of each of the first light conversion dots is greater than a size of each of the second light conversion dots.

A display system comprises light sources configured to emit first light with a first spectral power distribution; light regeneration layers configured to be stimulated by the first light and to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to primary colors and (b) secondary spectral components that do not correspond to the primary colors; and notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light. The portion of the second light can be directed to a viewer of the display system and configured to render images viewable to the viewer.

A display apparatus includes a liquid crystal panel; a plurality of light sources configured to emit blue light; a reflective sheet including four edge portions, wherein a plurality of holes are disposed on the reflective sheet, the plurality of holes includes a first hole disposed on each of the four edge portions of the reflective sheet, each of the four edge portions includes an edge of the reflective sheet, the first hole is disposed at a first distance from the edge of the reflective sheet; and a plurality of light conversion dots including eight first light conversion dots disposed around the first hole of the reflective sheet, and wherein a diameter of each of the eight first light conversion dots is equal to or greater than 1.04 mm, and is equal to or less than 1.56 mm, and wherein the plurality of light conversion dots includes at least one of a fluorescent material, a dye, or a pigment.

An electro-optic device comprises in order, an electrically-conductive light-transmissive layer, an electro-optic material layer, an adhesive layer, and a backplane substrate comprising a plurality of pixel electrodes configured to apply an electrical potential between the electrically-conductive light-transmissive layer and the pixel electrodes, An activation region, comprising an identification marker, is located in a layer of the electro-optic device and it emits radiation of a characteristic wavelength upon activation by a stimulus, enabling the identification of the manufacturing source and the manufacturing lot of the electro-optic device and its components. The technology is also relevant for a front plane laminate and a double release sheet, which are useful components for the manufacture of electro-optic devices.