Led display device having TFT substrate provided with LED driver units

Patent metadata

Field	Value
Publication number	US-10847548-B2
Application number	US-201816178608-A
Country	US
Kind code	B2
Filing date	Nov 2, 2018
Priority date	Nov 10, 2017
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

Disclosed is an LED display device using a TFT substrate provided with LED driver units. The LED display device includes a TFT substrate, LED chips, a light transmitting plate, and a heat dissipating plate. The TFT substrate includes a plurality of LED driver units arrayed in a matrix. Each of the LED driver units includes a plurality of transistors. The LED chips are attached to and driven by the corresponding LED driver units. The light transmitting plate is attached to the upper portions of the LED chips. Light emitted from the LED chips is transmitted through the light transmitting plate. The heat dissipating plate is attached to the TFT substrate to dissipate heat generated from the LED chips.

First claim

What is claimed is:

1. An LED display device comprising:
a TFT substrate comprising a plurality of LED driver units arrayed in a matrix, each of the LED driver units comprising a plurality of transistors;
LED chips attached to and driven by the corresponding LED driver units;
a light transmitting plate attached to the upper portions of the LED chips and through which light emitted from the LED chips is transmitted;
a heat dissipating plate attached to the TFT substrate to dissipate heat generated from the LED chips;
global voltage lines interconnected at one side of the TFT substrate;
global second electrode common lines interconnected parallel to the global voltage lines; and
a time control unit connected with the global voltage lines and the global second electrode common lines,
wherein each of the LED chips is a flip chip in which a first electrode and a second electrode face the TFT substrate,
wherein the TFT substrate comprises a plurality of voltage lines interconnected in a first direction on the LED driver units, a plurality of scan lines electrically insulated from the voltage lines and interconnected in a second direction crossing the first direction, and a plurality of data lines electrically insulated from the voltage lines and the scan lines and interconnected parallel to the voltage lines in the first direction,
wherein the TFT substrate comprises a plurality of second electrode common lines interconnected parallel to the plurality of voltage lines in the first direction,
wherein the second electrode common lines are connected in common to the electrode pads connected with the second electrodes of the LED chips corresponding to the plurality of LED driver units connected to each of the voltage lines,
wherein each of the global voltage lines is interconnected in the second direction, and the voltage lines are connected to the global voltage lines in common, and
wherein the global second electrode common lines are interconnected parallel in the second direction, and the second electrode common lines are connected to the global second electrode common lines in common.

2. The LED display device according to claim 1 , wherein the TFT substrate comprises electrode pads connected with the first electrodes of the LED chips and electrode pads connected with the second electrodes of the LED chips such that the LED driver units are electrically connected with the corresponding LED chips.

3. The LED display device according to claim 1 , wherein the light transmitting plate comprises a polarizing film attached to the upper portions of the LED chips and a touch film attached to the upper surface of the polarizing film.

4. The LED display device according to claim 1 , wherein the second electrode common lines and the voltage lines have linewidths of 20 μm.

5. An LED display device comprising:
a TFT substrate comprising a plurality of LED driver units arrayed in a matrix, each of the LED driver units comprising a plurality of transistors;
LED chips attached to and driven by the corresponding LED driver units;
a light transmitting plate attached to the upper portions of the LED chips and through which light emitted from the LED chips is transmitted; and
a heat dissipating plate attached to the TFT substrate to dissipate heat generated from the LED chips,
wherein each of the LED chips is a flip chip in which a first electrode and a second electrode face the TFT substrate,
wherein the TFT substrate comprises a plurality of voltage lines interconnected in a first direction on the LED driver units, a plurality of scan lines electrically insulated from the voltage lines and interconnected in a second direction crossing the first direction, and a plurality of data lines electrically insulated from the voltage lines and the scan lines and interconnected parallel to the voltage lines in the first direction, and
wherein the voltage lines comprise voltage line pairs, each of which comprises a first voltage line and a second voltage line, and when the number of the scan lines is 2n, an LED operating voltage is supplied to the LED driver unit connected to the first scan line to the LED driver unit connected to the n th scan line through the first voltage line and an LED operating voltage is supplied to the LED driver unit connected to the (n+1) th scan line to the LED driver unit connected to the 2n th scan line through the second voltage line.

6. The LED display device according to claim 5 , wherein the TFT substrate comprises electrode pads connected with the first electrodes of the LED chips and electrode pads connected with the second electrodes of the LED chips such that the LED driver units are electrically connected with the corresponding LED chips.

7. The LED display device according to claim 5 , wherein the light transmitting plate comprises a polarizing film attached to the upper portions of the LED chips and a touch film attached to the upper surface of the polarizing film.

8. The LED display device according to claim 5 , wherein the TFT substrate comprises a plurality of second electrode common lines interconnected parallel to the plurality of voltage lines in the first direction, and the second electrode common lines and the voltage lines have linewidths of 20 μm.

Assignees

• Lumens Co Ltd

Inventors

• Bang Jeongho

Classifications

• H10W40/22

  characterised by their shape, e.g. having conical or cylindrical projections · CPC title

• H10W90/00 Primary

  Package configurations · CPC title

• H10D86/40

  characterised by multiple TFTs · CPC title

• H10H20/858

  Means for heat extraction or cooling · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title