Plasma display device having a filter comprising an external light shielding sheet
AssigneeLG Electronics Inc.
InventorsYu Park, Tae Deok Seo, Jun Hwan Ju
Life of this patent
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Abstract
A plasma display apparatus may include an external light shielding sheet attached to a front of a panel to absorb and shield externally incident light. Accordingly, a black image can be implemented close to an original color and bright and dark room contrast can be improved. Furthermore, thickness of the external light shielding sheet and height of a pattern unit have a given ratio in order to properly secure an aperture ratio of the external light shielding sheet. Accordingly, light emitted into the panel can transmit toward a user side.
Claims29
A plasma display apparatus comprising:
- a plasma display panel (PDP);
- and
- a filter provided at a front of the PDP, the filter including an external light shielding sheet including a base unit and a plurality of pattern units formed on the base unit, and a thickness of the external light shielding sheet is 1.01 to 2.25 times greater than a height of one of the pattern units,
- wherein a bottom width of the one pattern unit is 1.5 to 2.5 times greater than a width at a center of the height of the one pattern unit, and
- wherein each of the plurality of pattern units has a top and a bottom that is wider than the top, the top has a curved shape, and the bottom faces to the PDP.
An apparatus comprising:
- a plasma display panel;
- and
- a filter provided at a front of the PDP, the filter having an external light shielding sheet that includes a base unit and pattern units formed on the base unit, the pattern units having a refractive index lower than a refractive index of the base unit, wherein a thickness of the external light shielding sheet is in a range of 1.01 to 2.25 times greater than a height of one of the pattern units,
- wherein a shortest distance between neighboring pattern units is 1.1 to 5 times greater than a bottom width of the one pattern unit,
- wherein the bottom width of the one pattern unit is 1 to 3.5 times greater than a width at a center of the height of the one pattern unit,
- wherein each of the plurality of pattern units has a top and a bottom that is wider than the top, the top has a curved shape, and the bottom faces to the PDP.
A plasma display apparatus comprising:
- a plasma display panel (PDP);
- and
- a filter provided at one side of the PDP, the filter including an external light shielding sheet having a base unit and a plurality of pattern units formed on the base unit, wherein a refractive index of the base unit is greater than the refractive index of one of the pattern units, and wherein a bottom width of one pattern unit is 1.5 to 2.5 times greater than a width at a center of a height of the one pattern unit,
- wherein each of the plurality of pattern units has a top and a bottom that is wider than the top, the top has a curved shape, and the bottom faces to the PDP.
Dependencies are inferred from the claim text.