Display apparatus

Patent metadata

Field	Value
Publication number	US-11688322-B2
Application number	US-202217936900-A
Country	US
Kind code	B2
Filing date	Sep 30, 2022
Priority date	Jun 23, 2017
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

A display apparatus including an OLED (organic light-emitting device) substrate having a structure in which at least one blue light-emitting unit and at least one green light-emitting unit are stacked, wherein the OLED substrate generates a mixed light of a blue light and a green light; and a color controller provided on the OLED substrate to adjust color of a light generated from the OLED substrate. The color controller includes a first color control element having a plurality of first quantum dots for green conversion; a second color control element having plurality of second quantum dots for red conversion; a third color control element for presenting a blue color; a first color filter provided on the first color control element; and a second color filter provided on the second color control element.

First claim

What is claimed is:

1. A display apparatus comprising:
an OLED (organic light-emitting device) substrate comprising at least one blue light-emitting unit and at least one green light-emitting unit, wherein the OLED substrate generates a mixed light of a blue light and a green light;
a first color control element comprising a plurality of first quantum dots for green conversion;
a second color control element comprising a plurality of second quantum dots for red conversion;
a third color control element for presenting a blue color;
a first color filter provided on the first color control element; and
a second color filter provided on the second color control element,
wherein the green light-emitting unit comprises an organic material-based green light emitting layer, and the green light-emitting layer comprises a phosphorescent dopant including metal M and at least one of the ligands represented by the following Chemical Formulae 1-1 to 1-4,

wherein the metal M comprises iridium (Ir), platinum (Pt), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), thulium (Tm), rhodium (Rh), nuthenium (Ru), rhenium (Re), beryllium (Be), magnesium (Mg), aluminum (Al), calcium (Ca), manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), palladium (Pd), silver (Ag), or gold (Au), and
wherein in Formulas 1-1 to 1-4,
A1 to A4 are each independently a substituted or unsubstituted C5-C30 carbocyclic group, a substituted or unsubstituted C1-C30 heterocyclic group, or a non-cyclic group,
Y11 to Y14 are each independently a chemical bond, O, S, N(R91), B(R91), P(R91) or C(R91)(R92),
T1 to T4 are each independently a single bond, a double bond, *—N(R93)—*′, *—B(R93)—*′, *—P(R93)—*′, *—C(R93)(R94)—*′, *—Si(R93)(R94)—*′, *—Ge(R93)(R94)—*′, *—S—*′, *—Se—*′, *—O—*, *—C(═O)—*′, *—S(═O)—*′, *—S(═O)2—*′, *—C(R93)=*′, *=C(R93)—*′, *—C(R93)═C(R94)—*′, *—C(═S)—*′, or *—C≡C—*′,
the substituent of the substituted C5-C30 carbocyclic group, the substituent of the substituted C1-C30 heterocyclic group, and R91 to R94 are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, —SF 5 , a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or salt thereof, a sulfonic acid group or salt thereof, a phosphoric acid group or salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 hetero-cycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic heterocondensed polycyclic group, —N(Q1)(Q2), —Si(Q3)(Q4)(Q5), —B(Q6)(Q7), or —P(═O)(Q8)(Q9), wherein Q1 to Q9 are each independently —CH 3 , —CD 3 , —CD2H, —CDH 2 , —CH 2 CH 3 , —CH 2 CD 3 , —CH 2 CD 2 H, —CH 2 CDH 2 , —CHDCH 3 , —CHDCD 2 H, —CHDCDH 2 , —CHDCD 3 , —CD 2 CD 3 , —CD 2 CD 2 H, or —CD 2 CDH 2 ; an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, and n-pentyl group, an isopentyl group, a sec-pentyl group, a tert-pentyl group, a phenyl group, or a naphthyl group, and
*1, *2, *3, and *4 are each independently a bonding sites to the metal M of the dopant.

2. The display apparatus of claim 1 , wherein the OLED substrate has a tandem structure.

3. The display apparatus of claim 1 , wherein the third color control element comprises a blue color filter.

4. The display apparatus of claim 3 , wherein
the display apparatus further comprises a light scattering element provided between the blue color filter and the OLED substrate.

5. The display apparatus of claim 1 , wherein
the third color control element comprises a color converter comprising a plurality of third quantum dots for blue conversion.

6. The display apparatus of claim 5 , wherein
the display apparatus further comprises a blue color filter provided on the third color control element.

7. The display apparatus of claim 1 , wherein
the first color filter is a blue cut filter, and
the second color filter is a blue and green cut filter.

8. The display apparatus of claim 1 , wherein
the first color filter is an absorption type green color filter, and
the second color filter is an absorption type red color filter.

9. The display apparatus of claim 1 , wherein
the first color control element corresponds to a first sub-pixel area, the second color control element corresponds to a second sub-pixel area, and the third color control element corresponds to a third sub-pixel area, and
the display apparatus further comprises a fourth sub-pixel area, wherein the fourth sub-pixel area produces a color other than colors of the first to third sub-pixel areas.

10. The display apparatus of claim 9 , wherein
the fourth sub-pixel area is a blank area on the OLED substrate without a color control element, or
the display apparatus comprises a light scattering element provided on the OLED substrate.

11. The display apparatus of claim 1 , wherein
the blue light-emitting unit emits a blue light having a peak wavelength range of about 440 nm to about 500 nm, and the green light-emitting unit emits a green light having a peak wavelength range of about 500 nm to about 550 nm.

12. The display apparatus of claim 1 , wherein
the number of the blue light-emitting unit is equal to or greater than the number of the green light-emitting unit.

13. The display apparatus of claim 1 , wherein
the OLED (organic light-emitting device) substrate comprising at least two blue light-emitting unit and at least one green light-emitting unit.

14. The display apparatus of claim 1 , further comprising a thin film transistor(TFT) array substrate having a plurality of thin film transistors to drive pixel areas of the OLED substrate.

15. A display apparatus comprising:
an OLED (organic light-emitting device) substrate comprising at least one blue light-emitting unit and at least one green light-emitting unit, wherein the OLED substrate generates a mixed light of a blue light and a green light,
a first color control element comprising a plurality of first quantum dots for green conversion;
a second color control element comprising a plurality of second quantum dots for red conversion;
a third color control element for presenting a blue color;
a first color filter provided on the first color control element;
a second color filter provided on the second color control element; and
a thin film transistor(TFT) array substrate having a plurality of thin film transistors to drive pixel areas of the OLED substrate;
wherein the third color control element comprises a blue color filter,
wherein the OLED (organic light-emitting device) substrate comprising at least two blue light-emitting unit and at least one green light-emitting unit, and
wherein the green light-emitting unit comprises an organic material-based green light emitting layer

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Sangyoon
• Lee Sunghun
• Jun Shinae
• Chung Chilhee
• Choi Byoungki
• Han Intaek

Classifications

• H10K59/878

  comprising reflective means · CPC title

• H10K59/877

  comprising scattering means · CPC title

• H10K2101/20

  Delayed fluorescence emission · CPC title

• G09G3/2003 Primary

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G3/3225 Primary

  using an active matrix · CPC title