Patent ID: 7852000
Filing Date: 2010-12-14
Classification: H01J

Abstract:
1. A flat fluorescent lamp structure comprising: a first substrate; a second substrate assembled to the first substrate to form a sealed space; at least one wall dividing the sealed space into: a plurality of illuminating chambers filled with a discharge gas; at least one tunnel formed therethrough to communicate the illuminating chambers, wherein the at least one tunnel divides the illuminating chamber into a first illuminating sub-chamber and a second illuminating sub-chamber; and a phosphor layer formed on a plurality of inner surfaces of the illuminating chambers; wherein a ratio of a length to a cross-section area of the tunnel is a first coefficient, the ratio of the length to the cross-section area of the first illuminating sub-chamber is the second coefficient, and the ratio of the length to the cross-section area of the second illuminating sub-chamber is a third coefficient, wherein the ratio of the first coefficient to the second coefficient is greater than about 1/20, wherein the tunnel extends along a tilt direction relative to the illuminating chamber, and therebetween the entire tilt direction and the illuminating chamber form an acute angle, and wherein the entire tilt direction is formed by a first end of the tunnel directly connected with the illuminating chamber and a second end of the tunnel directly connected with another illuminating chamber adjacent to the illuminating chamber.