US2016338161A1PendingUtilityA1

Backlight module with mjt led and backlight unit including the same

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Assignee: SEOUL SEMICONDUCTOR CO LTDPriority: Mar 6, 2014Filed: Jul 29, 2016Published: Nov 17, 2016
Est. expiryMar 6, 2034(~7.6 yrs left)· nominal 20-yr term from priority
Inventors:Young Jun SongHyuck Jung ChoiIl Kyung Suh
H10W 90/00H05B 45/46H05B 45/20G02F 1/133606G02F 1/133603H01L 33/62H01L 33/20H01L 33/06H01L 2933/0016H01L 33/46H01L 33/12H01L 33/007H01L 25/0753H01L 2933/005H01L 2933/0025H01L 33/502H01L 33/42H05B 33/0815H01L 2933/0041H01L 33/56H01L 2933/0066H05B 33/0827H01L 33/32H05B 33/0845H10H 20/819H10H 20/0364H10H 20/0362H10H 20/0361H10H 20/034H10H 20/032H10H 29/142H10H 20/8512H10H 20/8314H10H 20/8162H10H 20/01335H10H 20/857H10H 20/855H10H 20/854H10H 20/841H10H 20/833H10H 20/825H10H 20/815H10H 20/812G02F 1/133612
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Claims

Abstract

A display device includes a display panel and a backlight unit configured to provide light towards the display panel. The backlight unit includes a backlight module including multi junction technology (MJT) light emitting diodes (LEDs) disposed on blocks disposed on a printed circuit board, an operating power generator configured to generate a DC voltage based on an input voltage, and an operation controller configured to independently control an operation of each of the blocks, the operation controller disposed in an IC of drive circuits. Each of the blocks includes at least one of the MJT LEDs, a single anode, and a single cathode. Each of the MJT LEDs includes at least two light emitting cells disposed in a single LED chip, and anodes of the blocks are connected to the operating power generator, and cathodes of the blocks are directly connected to the IC of drive circuits.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A display device, comprising:
 a display panel; and   a backlight unit configured to provide light towards the display panel, the backlight unit comprising:
 a backlight module comprising multi junction technology (MJT) light emitting diodes (LEDs) disposed on blocks, the blocks disposed on a printed circuit board; 
 an operating power generator configured to generate a direct current (DC) voltage based on an input voltage; and 
 an operation controller configured to independently control an operation of each of the blocks, the operation controller disposed in an integrated circuit (IC) of drive circuits, 
   wherein:   each of the blocks comprises at least one of the MJT LEDs;   each of the MJT LEDs comprises at least two light emitting cells disposed in a single LED chip;   each of the blocks comprises a single anode and a single cathode; and   anodes of the blocks are connected to the operating power generator, and cathodes of the blocks are directly connected to the IC of drive circuits.   
     
     
         2 . The display device of  claim 1 , wherein:
 the backlight unit is disposed under the display panel; and   the blocks are evenly distributed under the display panel.   
     
     
         3 . The display device of  claim 2 , wherein:
 the blocks comprise M×N blocks disposed in a matrix arrangement; and   M and N are natural numbers greater than 1.   
     
     
         4 . The display device of  claim 2 , wherein the backlight unit comprises at least one of a direct type backlight unit and an edge type backlight unit. 
     
     
         5 . The display device of  claim 1 , wherein the operation controller comprises a plurality of switch controllers. 
     
     
         6 . The display device of  claim 1 , wherein the operating power generator is configured to provide the DC voltage to the blocks. 
     
     
         7 . The display device of  claim 1 , wherein the operating power generator is configured to divide the DC voltage to operate the IC of drive circuits and the blocks. 
     
     
         8 . The display device of  claim 7 , wherein an operating voltage of each of the blocks is higher than an IC operating voltage supplied to the IC of drive circuits. 
     
     
         9 . The display device of  claim 1 , wherein the display panel comprises a liquid crystal panel. 
     
     
         10 . The display device of  claim 1 , wherein an operating voltage of each of the blocks is about 6V to about to 36V. 
     
     
         11 . The display device of  claim 1 , wherein an operating voltage of each of the MJT LEDs is about 6V to about to 36V. 
     
     
         12 . The display device of  claim 1 , wherein an operating current of each of the blocks is equal to or less than 125 mA. 
     
     
         13 . The display device of  claim 1 , wherein an operating current of each of the blocks is equal to or less than 75 mA. 
     
     
         14 . The display device of  claim 12 , wherein an operating efficiency of the backlight unit is greater than 90%. 
     
     
         15 . The display device of  claim 1 , wherein each of the light emitting cells are configured to be operated by an operating voltage in a range of 2.5V to 4V. 
     
     
         16 . The display device of  claim 1 , further comprising lenses disposed on the MJT LEDs, respectively.

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