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LED tube lamp

  • US 10,641,435 B2
  • Filed: 12/21/2018
  • Issued: 05/05/2020
  • Est. Priority Date: 09/02/2015
  • Status: Active Grant
First Claim
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1. An LED tube lamp, comprising:

  • a lamp tube, which includes a light transmissive portion, a reinforcing portion and an end cap; and

    an LED light assembly, which includes an LED light source and an LED light strip, wherein;

    the light transmissive portion is fixedly connected to the reinforcing portion;

    the reinforcing portion includes a platform and a bracing structure;

    the bracing structure is fixedly connected to the platform and holds the platform in place;

    the LED light source is thermally and electrically connected to the LED light strip, which is in turn thermally connected to the reinforcing portion;

    the end cap is attached to an end of the lamp tube;

    an outer surface of the lamp tube reveals a combination of metallic outer surface and nonmetallic outer surface;

    a cross section of the lamp tube perpendicular to the lamp tube'"'"'s longitudinal axis reveals a combination of metallic object and nonmetallic object;

    a hypothetical line D-D horizontally bisects the cross section into an upper segment and a lower segment;

    the upper segment and the lower segment have an identical length vertically;

    a hypothetical line segment U-L vertically bisects the cross section into a left segment and a right segment;

    the left segment and the right segment have an identical length horizontally;

    the line segment U-L includes an upper endpoint U and a lower endpoint L, both endpoints falling on a circumference of the cross section;

    a length of the line segment U-L from the point U to the point L is H;

    a line T-T is a lowest horizontal line on the cross section above which no metallic object is found;

    a line B-B is a highest horizontal line on the cross section below which no metallic object is found;

    a distance from the line T-T to the line B-B is D3;

    a distance from the point U to the line T-T is D1;

    a distance from the line B-B to the point L is D2;

    a line T′

    -T′

    is a lowest horizontal line on the cross section above which no reinforcing portion is found;

    a line B′

    -B′

    is a highest horizontal line on the cross section below which no reinforcing portion is found;

    a distance from the line T′

    -T′

    to the line B-B is F;

    a distance from the point U to the line T′

    -T′

    is F1;

    a distance from the line B′

    -B′

    to the point L is F2;

    a hypothetical closed curve is defined on the cross section by all points whose distance from a center of the cross section is half the distance from the center to the circumference of the cross section;

    the curve divides the cross section into a disk containing the center and a ring surrounding the disk;

    R1 is a ratio of an overall area of the metallic outer surface to an overall area of the nonmetallic outer surface;

    R1 is from 0.001 to 0.9;

    R10 is D1/H;

    R10 is a constant regardless of where the cross section finds itself on the longitudinal axis of the lamp tube;

    R10 is from 0.055 to 0.95;

    R11 is D2/H;

    R11 is a constant regardless of where the cross section finds itself on the longitudinal axis of the lamp tube; and

    R11 is from 0.01 to 0.45.

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