DISPLAY MODULE AND DISPLAY APPARATUS HAVING THE SAME

• US 20130162506A1
• Filed: 12/21/2012
• Published: 06/27/2013
• Est. Priority Date: 12/23/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Jung Kyun, KIM, Sung Ki, KIM, Sru, KIM, Jin Sub, AN, Jun Seok, LEE, Kye Hoon, CHO, Jin Hyun, LEE, Heong Seog
• Granted Patent: US 9,417,494 B2
• Time in Patent Office: Days
• US Class Current: 345/82
• CPC Class Codes: F21V 29/50 Cooling arrangements air-treatment systems dissipating or using the heat of lighting fixtures F24F3/056
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 1/133628 with cooling means
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G06F 1/32 Means for saving power
• CPC Class Codes: G09F 13/04 Signs, boards or panels, illuminated from behind the insignia
• CPC Class Codes: G09F 13/0413 Frames or casing structures therefor
• CPC Class Codes: H05K 7/20963 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20972 takes precedence

Abstract

A display module including a backlight to more effectively dissipate heat generated at light emitting diodes (LEDs) and heat dissipation units to effectively dissipate heat generated at driver chips and prevent movement of the driver chips by attaching porous fillers to the heat dissipation units, and a display apparatus having the same are provided. The display module includes a display panel, a backlight disposed on a rear side of the display panel and including a plurality of printed circuit boards, a bottom chassis adapted to accommodate the backlight unit and provided with a plurality of seating grooves, a driving printed circuit board, a plurality of flexible printed circuit films which electrically connect the display panel and the driving printed circuit board, at least one heat dissipater disposed on an opposite surface of a corresponding one of the flexible printed circuit and provided with a porous filler.

Claims

1. A display module comprising:

a display panel;

a backlight disposed on a rear side of the display panel and comprising a plurality of printed circuit boards, each of the plurality of the printed circuit boards extending in one direction and comprising a plurality of light emitting diodes on a front surface thereof which irradiate the display panel with light;

a bottom chassis comprising a plurality of seating grooves extending in a longitudinal direction to allow the plurality of printed circuit boards to be seated therein;

a driving printed circuit board which supplies a drive signal to the display panel;

a plurality of flexible printed circuit films which electrically connect the display panel and the driving printed circuit board;

a driver chip mounted on one surface of each of the plurality of flexible printed circuit films; and

at least one heat dissipater disposed on an opposite surface of a corresponding one of the plurality of flexible printed circuit films which dissipates heat generated at the driver chip of the corresponding one of the plurality of flexible printed circuit films.

2. The display module according to claim 1, wherein:

the plurality of printed circuit boards are disposed in parallel spaced apart from each other; and

the plurality of seating grooves are arranged in parallel to correspond to the plurality of printed circuit boards.

3. The display module according to claim 1, further comprising at least one connection substrate which connects at least two of the plurality of printed circuit boards to each other,

wherein the bottom chassis comprises at least one connection substrate seating groove which connects the plurality of seating grooves to each other and in which the at least one connection substrate is seated.

4. The display module according to claim 3, wherein the bottom chassis is formed in a rectangular shape, wherein:

the plurality of seating grooves are formed to be parallel to a longer side of the bottom chassis; and

the connection substrate seating groove is formed to be parallel to a shorter side of the bottom chassis.

5. The display module according to claim 3, wherein the bottom chassis is formed in a rectangular shape, wherein:

the plurality of seating grooves are formed to be parallel to a shorter side of the bottom chassis; and

the connection substrate seating groove is formed to be parallel to a longer side of the bottom chassis.

6. The display module according to claim 1, further comprising a heat dissipation portion disposed on a rear surface of at least one of the plurality of printed circuit boards and adjoins an inner surface of a corresponding one of the plurality of seating grooves, wherein heat from the plurality of printed circuit boards is transferred to the bottom chassis through the heat dissipation portion.

7. The display module according to claim 6, wherein a depth of the plurality of seating grooves is not greater than a sum of a thickness of the plurality of printed circuit boards and a thickness of the heat dissipation portion.

8. The display module according to claim 6, wherein the heat dissipation portion comprises a graphite sheet.

9. The display module according to claim 6, wherein the heat dissipation portion comprises an aluminum heat sink plate.

10. The display module according to claim 3, wherein the plurality of printed circuit boards comprise a resin material, and each of the plurality of printed circuit boards comprise, on a front surface thereof, with a metal layer for heat dissipation.

11. The display module according to claim 1, further comprising a lens disposed on at least one of the plurality of light emitting diodes to diffuse light generated by the at least one of the plurality of light emitting diodes.

12. The display module according to claim 1, wherein a middle mold which supports the display panel is disposed on a rear surface of the display panel, and a top chassis fixed to the middle mold is disposed on a front surface of the display panel, and the display panel and the backlight are spaced apart from each other by the middle mold.

13. The display module according to claim 12, wherein the middle mold and the top chassis comprise a plastic material, and the plurality of flexible printed circuit films are positioned between the middle mold and the top chassis.

14. The display module according to claim 13, wherein the at least one heat dissipater is disposed such that one surface of the heat dissipater contacts the top chassis, and an opposite surface of the heat dissipater contacts the plurality of flexible printed circuit films.

15. The display module according to claim 14, wherein the at least one heat dissipater comprises a plurality of heat dissipaters disposed respectively on the plurality of flexible printed circuit films.

16. The display module according to claim 15, wherein each of the plurality of the heat dissipaters comprises a first adhesive sheet, one surface of which is adhered to the top chassis, a porous filler adhered to an opposite surface of the first adhesive sheet, a second adhesive sheet adhered to a top of the porous filler, a metal sheet adhered to a top of the second sheet to dissipate heat generated at the driver chip, and a heat radiation sheet with which a top of the metal sheet is coated.

17. The display module according to claim 16, wherein the porous filler is provided to prevent damage of components due to vibrations, and movement of the driver chip is prevented by the porous filler.

18. The display module according to claim 17, wherein the porous filler is comprises polyurethane foam and a flame retardant that is applied to a surface of the porous filler to suppress burning of the porous filler.

19. The display module according to claim 16, wherein the metal sheet comprises aluminum.

20. A display apparatus comprising:

the display module according to claim 1;

a power supply board which supplies power to the display panel and the plurality of printed circuit boards and which is disposed on a rear side of the display module;

a signal processing board which processes an image signal externally received and transmits the image signal to the display panel;

a case which accommodates the display module, the power supply board, and the signal processing board.

21. A display module comprising:

a display panel;

a backlight disposed on a rear side of the display panel; and

a bottom chassis which accommodates the backlight,

wherein;

the backlight comprises a plurality of printed circuit boards, each of the plurality of the printed circuit boards extending in one direction and comprising a plurality of light emitting diodes on a front surface thereof which irradiate the display panel with light;

the bottom chassis comprises a plurality of seating grooves extending in a longitudinal direction; and

the printed circuit boards are respectively seated in the plurality of seating grooves.

22. A display module comprising:

a display panel;

a middle mold disposed on a rear surface of the display panel which supports the display panel;

a top chassis disposed on a front surface of the display panel and fixed to the middle mold;

a driving printed circuit board which supplies a drive signal to the display panel;

a plurality of flexible printed circuit films which electrically connect the display panel and the driving printed circuit board;

a driver chip being mounted on one surface of each of the plurality of flexible printed circuit films; and

at least one heat dissipater disposed on an opposite surface of a corresponding one of the plurality of flexible printed circuit films which dissipates heat generated at the driver chip of the corresponding one of the plurality of flexible printed circuit films and comprising a porous filler attached therein.

23. A display module comprising:

at least one flexible printed circuit film which is connectable to a display panel and a driving printed circuit board;

a driver chip disposed on one surface of each of the at least one flexible printed circuit film; and

at least one heat dissipater, disposed on a surface of each of the at least one flexible printed circuit film,

wherein the at least one heat dissipater dissipates heat generated at the driver chip.

24. The display module according to claim 23, wherein each of the at least one heat dissipater comprises a porous filler attached therein.

25. The display module according to claim 24, wherein each of the at least one heat dissipater comprises a first adhesive sheet, a second adhesive sheet, a metal sheet and a heat radiation sheet,

wherein one surface of the first adhesive sheet is attachable to a top chassis of a display apparatus, the porous filler is adhered to an opposite surface of the first adhesive sheet, the second adhesive sheet is adhered to a top of the porous filler, the metal sheet is adhered to a top of the second adhesive sheet to dissipate heat generated at the driver chip, and the heat radiation sheet coats a top of the metal sheet.

26. The display module according to claim 25, wherein the porous filler comprises a polyurethane foam and a flame retardant that is applied to a surface of the porous filler to suppress burning of the porous filler.

27. The display module according to claim 25, wherein the metal sheet comprises aluminum.

28. A display module comprising:

a backlight comprising a plurality of printed circuit boards, each of which extends in one direction, and a plurality of light emitting diodes disposed on a front of the backlight; and

a heat dissipation portion disposed on a rear surface of at least one of the plurality of printed circuit boards, wherein heat from the printed circuit boards is transferred to a bottom chassis through the heat dissipation portion.

29. The display module according to claim 28, wherein the plurality of printed circuit boards are disposed in parallel spaced apart from each other.

30. The display module according to claim 28, further comprising:

at least one connection substrate to connect at least two of the plurality of printed circuit boards to each other.

31. The display module according to claim 28, wherein the heat dissipation portion comprises a graphite sheet.

32. The display module according to claim 28, wherein the heat dissipation portion comprises an aluminum heat sink plate.

33. The display module according to claim 28, wherein the plurality of printed circuit boards comprise a resin material, and each of the plurality of printed circuit boards comprises, on a front surface thereof, a metal layer for heat dissipation.