Insulation sheet for display light source, and insulation light source module, insulation backlight unit, and display device comprising same

An insulation sheet for a display light source, wherein the insulation sheet is provided on an opposite surface opposite to a circuit board mounting surface, LED elements configuring a light source of a display are mounted on the circuit board mounting surface and spaced a predetermined interval apart from each other, heat generated from the LED elements is blocked from being transmitted in a direction perpendicular to the opposite surface, the insulation sheet comprising:

• an adhesive member, wherein the adhesive member is a double-sided metal tape, the double-sided metal tape is attached on the opposite surface opposite to the circuit board mounting surface and includes a metal substrate for forming a hot spot having an area larger than a mounting area for each LED device and having thermal reliability and an adhesive layer on both surfaces of the metal substrate, wherein a thickness of the metal substrate is 7 to 75 μm;
• and
• an insulation member, wherein the insulation member is a graphite sheet, the graphite sheet is disposed on the adhesive member and includes a first surface perpendicular to a thickness direction and a second surface facing to the first surface, and has a function of minimizing heat transfer from the second surface toward a direction perpendicular to the second surface by moving the heat transferred toward the first surface adjacent to the adhesive member in the thickness direction and in a plane direction perpendicular to the thickness direction to lower a temperature of the LED elements, and predominantly moving the heat in the plane direction rather than the thickness direction, wherein the insulation member is formed in a thickness range of 70 to 500 μm;
• and
• a protective member provided on the second surface of the insulation member,
• wherein the graphite sheet includes natural graphite, and
• wherein the insulation member and the metal substrate minimize overlap due to plane-direction spreading of the heat transferred from the LED elements, and
• wherein a length and a width of each of the protective member and the adhesive member are formed to be greater than a length and a width of the insulation member, four side surfaces parallel to the thickness direction of the insulation member are sealed through the protective member and the adhesive member.