Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10816849-B2
Application number	US-201715853773-A
Country	US
Kind code	B2
Filing date	Dec 23, 2017
Priority date	Dec 30, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

Disclosed is a liquid crystal display (LCD) device having a thin thickness. The LCD device includes a liquid crystal display panel and a light source panel coupled to the liquid crystal display panel. The light source panel includes a plurality of emissive areas defined on a base plate, a plurality of light emitting devices respectively disposed in the plurality of emissive areas, and a plurality of concave portions respectively accommodating the plurality of light emitting devices.

First claim

What is claimed is:

1. A liquid crystal display (LCD) device comprising:
a liquid crystal display panel including a lower substrate and an upper substrate attached to each other with a liquid crystal layer therebetween; and
a light source panel coupled to the liquid crystal display panel,
wherein the light source panel comprises,
a plurality of emissive areas defined on a base plate;
a plurality of light emitting devices corresponding to the plurality of emissive areas, each of the plurality of light emitting devices including a first electrode and a second electrode;
an adhesive member between each of the plurality of light emitting devices and the base plate;
a source scan line on the base plate and connected to the first electrode of the light emitting device;
a light source data line on the base plate and connected to the second electrode of the light emitting device;
a first planarization layer covering the plurality of light source scan lines and the plurality of light source data lines, surrounding lateral side surfaces of each of the plurality of light emitting devices;
a second planarization layer disposed on the first planarization layer and the plurality of light emitting devices;
a first electrode connection pattern on the second planarization layer, connecting the first electrode of the plurality of light emitting devices to the light source data line; and
a plurality of second electrode connection patterns on the second planarization layer, connecting the second electrode of the plurality of light emitting devices to the light source scan line,
wherein each of the plurality of light emitting devices is embedded in the second planarization layer,
wherein each of the plurality of light emitting devices comprises a first portion and a second portion opposite to the first portion, the first portion including the first electrode and the second electrode, and
wherein the adhesive member is between the second portion and the base plate.

2. The LCD device of claim 1 , further comprising an optical gap member between the liquid crystal display panel and the light source panel.

3. The LCD device of claim 2 , wherein the optical gap member includes a transparent material layer on the plurality of emissive areas.

4. The LCD device of claim 3 , wherein the plurality of light emitting devices includes a micro white light emitting diode chip emitting light having a first color, and the optical gap member includes a wavelength converting material converting part of the light having the first color into light having a second color.

5. The LCD device of claim 4 , wherein the wavelength converting material includes a phosphor or a quantum dot.

6. The LCD device of claim 3 , wherein the optical gap member has a plurality of lens patterns protruding toward and vertically overlapping the plurality of light emitting devices.

7. The LCD device of claim 6 , wherein the plurality of lens patterns has a cone-shaped or dome-shaped cross-sectional surface.

8. The LCD device of claim 6 , wherein the plurality of light emitting devices includes a micro white light emitting diode chip emitting light having a first color, and the optical gap member includes a wavelength converting material converting part of the light having the first color into light having a second color.

9. The LCD device of claim 2 , wherein the base plate of the light source panel is attached to the optical gap member.

10. The LCD device of claim 9 , wherein the light source panel further comprises a reflective member covering each of the plurality of light emitting devices, and
wherein the plurality of light emitting devices are between the base plate and the reflective member.

11. The LCD device of claim 1 , wherein the plurality of light emitting devices includes a micro white light emitting diode chip emitting white light.

12. The LCD device of claim 1 , further comprising a gap spacer between the liquid crystal display panel and the light source panel and providing an air gap.

13. The LCD device of claim 1 , wherein the light source panel further comprise:
a light source driving circuit unit including the source scan line and the light source data line respectively connected to the plurality of light emitting devices, disposed on the base plate, and respectively defining the plurality of emissive areas; and
a planarization layer covering the light source driving circuit unit,
wherein the plurality of light emitting devices are disposed on the planarization layer, and
wherein a distance between the first portion to the base plate is greater than a distance between the second portion to the base plate.

14. The LCD device of claim 13 , further comprising,
a first electrode connection pattern on the planarization layer, connecting the first electrode of the plurality of light emitting devices to the light source data line; and
a plurality of second electrode connection patterns on the planarization layer, connecting the second electrode of the plurality of light emitting devices to the light source scan line.

15. The LCD device of claim 13 , wherein the planarization layer comprises:
a transparent layer covering the light source driving circuit unit; and
a light blocking layer covering the transparent layer except for each of an area corresponding to the plurality of light emitting devices.

16. The LCD device of claim 1 , wherein the light source panel further comprise:
a plurality of light emitting circuits each including a common power line and a driving thin film transistor connected to a light emitting device in each of the plurality of emissive areas; and
a planarization layer covering the plurality of light emitting circuits,
wherein the plurality of light emitting devices are disposed on the planarization layer,
wherein a distance between the first portion to the base plate is greater than a distance between the second portion to the base plate, and
wherein each of the plurality of light emitting circuits is connected to the source scan line and the light source data line.

17. The LCD device of claim 16 , wherein the light source panel further comprising:
a plurality of first electrode connection patterns on the planarization layer, connecting the first electrode of the plurality of light emitting devices to a driving thin film transistor; and
a plurality of second electrode connection patterns on the planarization layer, connecting the second electrode of the plurality of light emitting devices to a common power line.

18. The LCD device of claim 1 , wherein the light source panel further comprises a plurality of reflective patterns between the base plate and each of the plurality of light emitting devices.

19. The LCD device of claim 1 , wherein the base plate of the light source panel is attached to the liquid crystal display panel.

20. The LCD device of claim 1 , wherein the light source panel includes a plurality of light emitting groups each including one or more light emitting devices, and each of the plurality of light emitting groups emits light by units of groups.

21. The LCD device of claim 1 , wherein the adhesive member is between each of the plurality of light emitting devices and the first planarization layer, and
wherein the second portion is attached to the adhesive member.

22. The LCD device of claim 1 , wherein the light source panel further comprises an interlayer dielectric provided on the base plate to cover the source scan line and the light source

Assignees

• Lg Display Co Ltd

Inventors

• Lee Changho
• Jeong Woonam
• Son Hyeonho
• Kim Hanseok

Classifications

• H10D86/451

  characterised by the compositions or shapes of the interlayer dielectrics · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10H20/825

  containing nitrogen, e.g. GaN · CPC title

• H10H20/812

  within the light-emitting regions, e.g. having quantum confinement structures · CPC title