Light source device and display apparatus having the same

1 . A light source device comprising:

a LED chip configured to emit light;

a driving controller provided with a control circuit to control driving of the LED chip;

an electrode pad provided on a top surface of the driving controller so that the LED chip is bonded and configured to transmit an electrical signal provided from the driving controller to the LED chip;

an external connection pad provided on a bottom surface of the driving controller and electrically connected to the control circuit to transmit an electrical signal provided from the outside to the control circuit;

a test pad provided on the top surface of the driving controller so as to be electrically connected to the control circuit and configured to perform electrical measurement; and

a via plug connected to the test pad to partially pass through the driving controller,

wherein the driving controller comprises:

a substrate on which the control circuit is disposed;

a through-electrode connected to the external connection pad to pass through the substrate; and

a shared connection pad connected to the control circuit on the top surface of the substrate to electrically connect each of a lower end of the via plug and an upper end of the through-electrode to the control circuit,

wherein the electrode pad is laminated on a top surface of the substrate on which the control circuit is disposed, and

the driving controller is provided at an opposite side of a light emitting direction of the LED chip,

wherein the lower end of the via plug and the upper end of the through-electrode are misaligned to be connected to top and bottom surfaces of the shared connection pad, respectively, and

wherein a lower end of the through-electrode has a diameter of 30 μm to 800 μm and greater than that of an upper end of the through-electrode.

2 . The light source device of claim 1 , wherein the test pad is spaced apart from the electrode pad and provided on an edge portion of the top surface of the driving controller.

3 . The light source device of claim 1 , wherein the through-electrode has a length of 40 μm to 1,000 μm.

4 . The light source device of claim 1 , wherein the external connection pad is provided in plurality, and

an interval between the plurality of external connection pads ranges of 30 μm to 800 μm.

5 . The light source device of claim 1 , wherein the driving controller further comprises an insulating layer disposed on the top surface of the substrate,

the control circuit comprises:

a line layer disposed on the top surface of the substrate so as to be covered by the insulating layer; and

a conductive via configured to at least partially pass through the insulating layer so as to be connected to the line layer, and

the electrode pad is disposed on the insulating layer so as to be connected to the conductive via.

6 . The light source device of claim 1 , further comprising a molding part configured to cover the LED chip on the driving controller.

7 . The light source device of claim 6 , wherein the molding part comprises a black additive, a scattering agent, or a fluorescent material.

8 . The light source device of claim 1 , wherein the LED chip is provided in plurality,

the plurality of LED chips comprise first and second electrodes, and

the electrode pad comprises:

a first electrode pad connected to the first electrode of each of the LED chips; and

a second electrode pad connected to the second electrode of each of the LED chips.

9 . The light source device of claim 8 , wherein each of an interval between two adjacent first electrode pads and an interval between two adjacent second electrode pads ranges of 1 μm to 300 μm.

10 . The light source device of claim 8 , wherein each of the LED chips is flip-chip bonded by directly connecting the first electrode and the second electrode to the first electrode pad and the second electrode pad, respectively.

11 . A display apparatus comprising:

a light source device of claim 1 ; and

a circuit board on which a plurality of light source devices are arranged and mounted.