Lighting system and liquid crystal backlight device
First Claim
1. A lighting apparatus, comprising:
- an optical member; and
a plurality of locking portions, wherein,a light emitting plane of the optical member is parallel to a vertical direction and at least one opening is provided in each of four regions of the optical member that are demarcated by a line parallel to the vertical direction that passes through the center of gravity of the light emitting plane of the optical member and a line parallel to a horizontal direction that passes through the center of gravity,in each of the four regions, a locking portion penetrates a corresponding opening,regardless of which two adjacent regions of the four regions are positioned vertically above with respect to the center of gravity when the lighting apparatus is set, the optical member is suspended by the locking portion penetrating the corresponding opening in a vertically upper and horizontally left region with respect to the center of gravity, and by the locking portion penetrating the corresponding opening in a vertically upper and horizontally right region with respect to the center of gravity, as an upper peripheral portion of each locking portion abuts on an upper-edge portion of the corresponding opening, andin a vertically lower side with respect to the center of gravity of the optical member, each of the locking portions penetrates the corresponding opening such that the optical member is not subjected to the stress caused by its own weight in the vertically upward direction, nor is it subjected to the stress caused by its contact in the vertically downward direction with the locking portion.
1 Assignment
0 Petitions
Accused Products
Abstract
Luminance irregularities caused by the weight of the optical members in a backlight apparatus are reduced. A lighting apparatus comprises optical members 1 and 2, a casing in which the optical members 1 and 2 and a lamp 4 are disposed, a first member 1a formed in optical members 1 and 2, and a second member 3a formed in the casing for attaching the optical members 1 and 2 to the casing by cooperating with the first member 1a. The first and second members 1a and 3a are provided in positions such that no upward stress is applied to the optical members due to their own weights at the bottom in a vertical direction in the plane of the display screen, both in a basic position and a first stop position of the lighting apparatus, the latter position being reached by rotation of the apparatus from the basic position in the plane of the display screen.
30 Citations
17 Claims
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1. A lighting apparatus, comprising:
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an optical member; and a plurality of locking portions, wherein, a light emitting plane of the optical member is parallel to a vertical direction and at least one opening is provided in each of four regions of the optical member that are demarcated by a line parallel to the vertical direction that passes through the center of gravity of the light emitting plane of the optical member and a line parallel to a horizontal direction that passes through the center of gravity, in each of the four regions, a locking portion penetrates a corresponding opening, regardless of which two adjacent regions of the four regions are positioned vertically above with respect to the center of gravity when the lighting apparatus is set, the optical member is suspended by the locking portion penetrating the corresponding opening in a vertically upper and horizontally left region with respect to the center of gravity, and by the locking portion penetrating the corresponding opening in a vertically upper and horizontally right region with respect to the center of gravity, as an upper peripheral portion of each locking portion abuts on an upper-edge portion of the corresponding opening, and in a vertically lower side with respect to the center of gravity of the optical member, each of the locking portions penetrates the corresponding opening such that the optical member is not subjected to the stress caused by its own weight in the vertically upward direction, nor is it subjected to the stress caused by its contact in the vertically downward direction with the locking portion. - View Dependent Claims (2, 3)
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4. A lighting apparatus comprising:
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an optical member having a plurality of openings; and a plurality of locking portions, the lighting apparatus comprising at least four sets of the opening and the locking portion that penetrates the opening, wherein, either in a basic position of the lighting apparatus in which a light emitting plane of the optical member is parallel with a vertical direction, or in a first stop position thereof that is taken when the lighting apparatus is rotated from the basic position in the plane of the optical member while the light emitting plane of the optical member remains parallel to a vertical direction, the optical member is suspended by at least one of the sets of the opening and the locking portion that penetrates the opening, as they are engaged with one another in a vertically upper side with respect to the center of gravity of the optical member, and in a vertically lower side with respect to the center of gravity of the optical member, each of the locking portions penetrates a corresponding opening such that the optical member is not subjected to the stress caused by its own weight in the vertically upward direction, nor is it subjected to the stress caused by its contact in the vertically downward direction with the locking portion. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A lighting apparatus comprising:
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an optical member having a plurality of cutout portions; and a plurality of locking portions associated with the cutout portions, wherein, a light emitting plane of the optical member is parallel with a vertical direction, the cutout portions are formed in the each end-sides of the optical member at the top, bottom, left, and right of the optical member with respect to the center of gravity of the light emitting plane, such that the cutout portions can be engaged with the locking portions, and regardless of which of the top, bottom, left, and right end-sides comes at the top when the lighting apparatus is set, the optical member is supported by an upper internal edge of each of the cutout portions in the left and right end-sides of the optical member abutting on the locking portion adapted to be engaged with the cutout portion. - View Dependent Claims (15, 16, 17)
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Specification