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US 8,011,802 B2Granted
Optical film, lighting device and display unit
AssigneeSony Corporation
InventorMitsunari Hoshi
Life of this patent
Estimating the term…
Abstract
A display unit capable of reducing luminance irregularity when using a point light source is provided. The display unit includes: a panel driven based on an image signal; a plurality of point light sources arranged in a region facing the panel; and an optical sheet arranged between the panel and the plurality of point light sources. The plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions.
Claims13
A lighting device comprising:
- a plurality of point light sources arranged in plane with each other;
- and
- an optical sheet arranged in a region facing the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions, wherein
- the optical sheet includes a pair of first slant faces opposed each other with the first ridgeline in between and a pair of second slant faces opposed each other with the second ridgeline in between, and
- inclinations of the respective first and second slant faces are determined so that an arm length D of each X-shaped light source image, which is obtained by dividing a light source image produced from a light emitted from each of the plurality of point light sources into plural images through the optical sheet, satisfies the following expression when a pitch of the point light sources is defined as P:
- D≧P/2.
5 more elements
A lighting device comprising:
- a plurality of point light sources arranged in plane with each other;
- and
- an optical sheet arranged in a region facing the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and
- wherein extending directions of the first and second ridgelines are respectively determined so that a plurality of X-shaped light source images do not overlap each other.
4 more elements
A lighting device comprising:
- a plurality of point light sources arranged in plane with each other;
- and
- an optical sheet arranged in a region facing the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and
- wherein the extending directions of the first and second ridgelines are respectively determined so that a width of space between a plurality of respective X-shaped light source images are approximately same.
4 more elements
A lighting device comprising:
- a plurality of point light sources arranged in plane with each other;
- and
- an optical sheet arranged in a region facing the plurality of point light sources, wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and wherein the first direction and the second direction are orthogonal or approximately orthogonal to each other, and an angle of the first ridgeline and the first direction, which is defined as θ1, and
- an angle of the second ridgeline and the second direction. which is defined as θ2, satisfy the following expressions:
- 10°<θ1<40°
- 10°<θ2<40°.
5 more elements
A lighting device comprising:
- a plurality of point light sources arranged in plane with each other;
- and
- an optical sheet arranged in a region facing the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and
- wherein the first direction and the second direction are orthogonal or approximately orthogonal to each other, and
- the angle θ1 of the first ridgeline and the first direction and the angle θ2 of the second ridgeline and the second direction satisfy the following expression:
- θ1=θ2=25°.
6 more elements
A display unit comprising:
- a panel driven based on an image signal;
- a plurality of point light sources arranged in a region facing the panel;
- and
- an optical sheet arranged between the panel and the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and
- wherein extending directions of the first and second ridgelines are respectively determined so that a plurality of X-shaped light source images do not overlap each other.
5 more elements
An optical film having a rectangular shape, and including a first side extending in one direction and a second side extending in a direction orthogonal to the one direction,
- wherein the optical film has a tridimensional configuration that includes a first ridgeline extending in a direction that intersects with extending directions of the first and second sides, respectively, and a second ridgeline extending in a direction that intersects with the extending directions of the first and second sides and extending direction of the first ridgeline;
- and
- wherein extending directions of the first and second ridgelines are respectively determined so that a plurality of X-shaped light source images do not overlap each other.
A display unit comprising:
- a panel driven based on an image signal;
- a plurality of point light sources arranged in a region facing the panel;
- and
- an optical sheet arranged between the panel and the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and
- wherein the extending directions of the first and second ridgelines are respectively determined so that a width of space between a plurality of respective X-shaped light source images are approximately same.
5 more elements
A display unit comprising:
- a panel driven based on an image signal;
- a plurality of point light sources arranged in a region facing the panel;
- and
- an optical sheet arranged between the panel and the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and
- wherein the first direction and the second direction are orthogonal or approximately orthogonal to each other, and an angle of the first ridgeline and the first direction, which is defined as θ1, and
- an angle of the second ridgeline and the second direction, which is defined as θ2, satisfy the following expressions:
- 10°<θ1<40°
- 10°<θ2<40°.
8 more elements
A display unit comprising:
- a panel driven based on an image signal;
- a plurality of point light sources arranged in a region facing the panel;
- and
- an optical sheet arranged between the panel and the plurality of point light sources,
- wherein the plurality of point light sources are arranged in a first direction and also in a second direction intersecting with the first direction, and
- the optical sheet has a tridimensional configuration that includes a first ridgeline extending in a third direction intersecting with the first and second directions, and a second ridgeline extending in a direction intersecting with the first, second and third directions;
- and
- wherein the first direction and the second direction are orthogonal or approximately orthogonal to each other, and
- the angle θ1 of the first ridgeline and the first direction and the angle θ2 of the second ridgeline and the second direction satisfy the following expression:
- θ1=θ2=25°.
7 more elements
An optical film having a rectangular shape, and including a first side extending in one direction and a second side extending in a direction orthogonal to the one direction,
- wherein the optical film has a tridimensional configuration that includes a first ridgeline extending in a direction that intersects with extending directions of the first and second sides, respectively, and a second ridgeline extending in a direction that intersects with the extending directions of the first and second sides and extending direction of the first ridgeline;
- and
- wherein the extending directions of the first and second ridgelines are respectively determined so that a width of space between a plurality of respective X-shaped light source images are approximately same.
An optical film having a rectangular shape, and including a first side extending in one direction and a second side extending in a direction orthogonal to the one direction,
- wherein the optical film has a tridimensional configuration that includes a first ridgeline extending in a direction that intersects with extending directions of the first and second sides, respectively, and a second ridgeline extending in a direction that intersects with the extending directions of the first and second sides and extending direction of the first ridgeline;
- and
- wherein the first direction and the second direction are orthogonal or approximately orthogonal to each other, and an angle of the first ridgeline and the first direction, which is defined as θ1, and
- an angle of the second ridgeline and the second direction, which is defined as θ2, satisfy the following expressions:
- 10°<θ1<40°
- 10°<θ2<40°.
3 more elements
An optical film having a rectangular shape, and including a first side extending in one direction and a second side extending in a direction orthogonal to the one direction,
- wherein the optical film has a tridimensional configuration that includes a first ridgeline extending in a direction that intersects with extending directions of the first and second sides, respectively, and a second ridgeline extending in a direction that intersects with the extending directions of the first and second sides and extending direction of the first ridgeline;
- wherein the first direction and the second direction are orthogonal or approximately orthogonal to each other, and
- the angle θ1 of the first ridgeline and the first direction and the angle θ2 of the second ridgeline and the second direction satisfy the following expression:
- θ1=θ2=25°.
1 more element
Dependencies are inferred from the claim text.