Display panel and display apparatus having the same

Patent metadata

Field	Value
Publication number	US-10930713-B2
Application number	US-201916599436-A
Country	US
Kind code	B2
Filing date	Oct 11, 2019
Priority date	Oct 11, 2018
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A display panel, including a light source configured to emit blue light; and a quantum dot color filter layer including: a red light converter including a red quantum dot particle configured to convert the blue light into red light, a green light converter including a green quantum dot particle configured to convert the blue light into green light, a light transmitting portion configured to transmit the blue light, and a white light generator including a first region and a second region, wherein the first region comprises a plurality of yellow quantum dot particles configured to convert the blue light into yellow light, wherein the second region transmits the blue light.

First claim

What is claimed is:

1. A display panel comprising:
a light source configured to emit blue light; and
a quantum dot color filter layer comprising:
a red light converter comprising a red quantum dot particle configured to convert the blue light into red light,
a green light converter comprising a green quantum dot particle configured to convert the blue light into green light,
a light transmitting portion configured to transmit the blue light, and
a white light generator comprising a first region and a second region,

wherein the first region comprises a plurality of yellow quantum dot particles configured to convert the blue light into yellow light,
wherein the second region transmits the blue light.

2. The display panel of claim 1 , wherein the yellow light has an emission peak wavelength in a range of 540 nm to 580 nm.

3. The display panel of claim 1 , further comprising:
a blue light blocking filter arranged at a front of the red light converter and a front of the green light converter, and configured to block blue light.

4. The display panel of claim 1 , further comprising:
a blue light transmission filter arranged at a front of the light transmitting portion and configured to transmit the blue light and to block all light other than the blue light.

5. The display panel of claim 1 , wherein the light source comprises:
a red sub-pixel region configured to emit the blue light toward the red light converter;
a green sub-pixel region configured to emit the blue light toward the green light converter;
a blue sub-pixel region configured to emit the blue light toward the light transmitting portion; and
a white sub-pixel region configured to emit the blue light toward the white light generator.

6. The display panel of claim 5 , further comprising
an anode comprising:
a red pixel electrode configured to supply a first current to the red sub-pixel region;
a green pixel electrode configured to supply a second current to the green sub-pixel region;
a blue pixel electrode configured to supply a third current to the blue sub-pixel region; and
a white pixel electrode configured to supply a fourth current to the white sub-pixel region.

7. The display panel of claim 6 , wherein a size of the red pixel electrode is smaller than a size of the red light converter, a size of the green pixel electrode is smaller than a size of the green light converter, a size of the blue pixel electrode is smaller than a size of the light transmitting portion, and a size of the white pixel electrode is smaller than a size of the white light generator.

8. The display panel of claim 1 , further comprising a plurality of partitions,
wherein a first partition of the plurality of partitions is arranged between the red light converter and the green light converter, a second partition of the plurality of partitions is arranged between the green light converter and the light transmitting portion, and a third partition of the plurality of partitions is arranged between the light transmitting portion and the white light generator, and
wherein the plurality of partitions is formed of a black material absorbing light.

9. The display panel of claim 8 , further comprising:
a reflective layer formed on a front surface of the plurality of partitions and configured to reflect incident light.

10. The display panel of claim 1 , further comprising
an anti-reflection layer arranged at a front of the quantum dot color filter layer, and configured to prevent reflection of external light.

11. The display panel of claim 1 , wherein the light transmitting portion comprises a scattering particle configured to scatter incident light.

12. The display panel of claim 1 , wherein the light transmitting portion comprises a blue dye configured to transmit the blue light among incident light and absorb all light other than the blue light.

13. The display panel of claim 1 , wherein the plurality of the yellow quantum dot particles in the white light generator have a concentration relatively low in comparison with a concentration of the quantum dot particles in the red light converter or the green light converter.

14. A display panel comprising:
a light source configured to emit blue light; and
a quantum dot color filter layer comprising:
a red light converter comprising a red quantum dot particle configured to convert the blue light into red light,
a green light converter comprising a green quantum dot particle configured to convert the blue light into green light,
a light transmitting portion configured to transmit the blue light, and
a white light generator comprising a red quantum dot particle configured to convert a first portion of the blue light into red light, a green quantum dot particle configured to convert a second portion of the blue light into green light,

wherein the white light generator is configured to transmit a third portion of the blue light.

15. A display apparatus comprising:
a light source configured to emit blue light;
a quantum dot color filter layer comprising:
a red light converter comprising a red quantum dot particle configured to convert the blue light into red light,
a green light converter comprising a green quantum dot particle configured to convert the blue light into green light,
a light transmitting portion configured to transmit the blue light, and
a white light generator comprising a yellow quantum dot particle configured to convert a first portion of the blue light into yellow light, wherein the white light generator is further configured to transmit a second portion of the blue light;

an anode comprising:
a red pixel electrode corresponding to the red light converter,
a green pixel electrode corresponding to the green light converter,
a blue pixel electrode corresponding to the light transmitting portion, and
a white pixel electrode corresponding to the white light generator; and

a controller configured to control the white pixel electrode to supply a current to the light source to output white light.

16. The display apparatus of claim 15 , further comprising:
a thin film transistor (TFT) array comprising:
a red pixel TFT connected to the red pixel electrode,
a green pixel TFT connected to the green pixel electrode,
a blue pixel TFT connected to the blue pixel electrode, and
a white pixel TFT connected to the white pixel electrode,

wherein the controller is further configured to activate the white pixel TFT to output the white light.

17. The display apparatus of claim 5 , wherein the yellow light has an emission peak wavelength in a range of 540 nm to 580 nm.

18. The display apparatus of claim 15 , further comprising a blue light blocking filter arranged at a front of the red light converter and a front of the green light converter and configured to block blue light.

19. The display apparatus of claim 15 , further comprising a blue light transmission filter arranged at a front of the light transmitting portion and configured to transmit blue light and to block all light other than the blue light.

20. The display apparatus of claim 15 , further comprising an anti-reflection layer arranged at a front of the quantum dot color filter layer and configured to prevent reflection of external light.

21. The display apparatus of claim 15 , wherein the light transmitting portion comprises a scattering particle configured to scatter incident light.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Kye Hoon

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/878

  comprising reflective means · CPC title

• H10K59/38 Primary

  comprising colour filters or colour changing media [CCM] · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title

• H10K59/351

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title