CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0058093, filed on May 17, 2019 in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

Exemplary embodiments of the inventive concept relate to a display apparatus. More particularly, exemplary embodiments of the inventive concept relate to a display apparatus capable of improving a resolution thereof.

DISCUSSION OF RELATED ART

Previously, cathode ray tube (CRT) display apparatuses had been commonly used due to performance and competitive prices. However CRT display apparatuses have weaknesses with regards to size and portability. Recently, display apparatuses having light weight and small size have been manufactured. Display apparatuses such as plasma display apparatuses, liquid crystal display apparatuses, and organic light emitting display apparatuses have been highly regarded due to small size, light weight, and low power consumption.

A display apparatus may include a plurality of pixel units arranged in a matrix to display an image. One pixel unit may include a red sub pixel that emits red light, a green sub pixel that emits green light, and a blue sub pixel that emits blue light, which are driven separately.

In an organic light emitting diode display apparatus, light emitting layers constituting the sub pixels may be formed through various methods. There is a difficulty in forming patterns of the light emitting layers as a resolution of the display apparatus increases.

SUMMARY

According to an exemplary embodiment of the inventive concept, a display apparatus includes pixel units each of which includes a first light emitting portion, a second light emitting portion, and a third light emitting portion, each emitting a different color light. The display apparatus includes a thin film transistor substrate, a first light emitting group disposed on the thin film transistor substrate and including eight first light emitting portions included in different pixel units, a second light emitting group disposed on the thin film transistor substrate and including eight second light emitting portions included in different pixel units, and a third light emitting group disposed on the thin film transistor substrate and including four third light emitting portions included in different pixel units.

In an exemplary embodiment of the inventive concept, the first light emitting group, the second light emitting group, and the third light emitting group may be formed in plural as first light emitting groups, second light emitting groups, and third light emitting groups, respectively, and arranged in a matrix form along a first direction and a second direction crossing the first direction on the thin film transistor substrate. The number of the third light emitting groups per unit area may be twice the number of the first or second light emitting groups.

In an exemplary embodiment of the inventive concept, centers of two light emitting groups adjacent to each other among the first to third light emitting groups may be spaced apart from each other by a first distance. A distance between centers of two of the first light emitting groups closest to each other may be a second distance which is twice the first distance.

In an exemplary embodiment of the inventive concept, the first light emitting portion, the second light emitting portion, and the third light emitting portion arranged closest to one another form one pixel unit.

In an exemplary embodiment of the inventive concept, the first light emitting portion, the second light emitting portion, and the third light emitting portion of the one pixel unit may be arranged in a triangular shape.

In an exemplary embodiment of the inventive concept, the triangular shape may be a right isosceles triangle.

In an exemplary embodiment of the inventive concept, the first light emitting portion may emit green light, the second light emitting portion may emit red light, and the third light emitting portion may emit blue light.

In an exemplary embodiment of the inventive concept, the third light emitting portion may emit red light or green light.

In an exemplary embodiment of the inventive concept, a distance between centers of two of the third light emitting groups closest to each other may be larger than the first distance and smaller than the second distance.

In an exemplary embodiment of the inventive concept, the first light emitting group may include eight pixel electrodes corresponding to the eight first light emitting portions, one light emitting layer overlapping all of the eight pixel electrodes, and an opposite electrode overlapping the one light emitting layer.

In an exemplary embodiment of the inventive concept, the first light emitting group may have a circular or polygonal shape.

In an exemplary embodiment of the inventive concept, the display apparatus may further include a light emitting group defining layer disposed on the thin film transistor substrate and having an opening. The one light emitting layer may be disposed in the opening of the light emitting group defining layer.

In an exemplary embodiment of the inventive concept, the display apparatus may further include a light emitting portion defining layer disposed in the opening of the light emitting group defining layer. The light emitting portion defining layer may be disposed between adjacent pixel electrodes of the eight pixel electrodes.

In an exemplary embodiment of the inventive concept, the light emitting group defining layer may include a liquid repellent material. The light emitting portion defining layer may include a lyophilic material.

In an exemplary embodiment of the inventive concept, the one light emitting layer may be formed by inkjet printing.

In an exemplary embodiment of the inventive concept, one of the first light emitting group, the second light emitting group, and the third light emitting group may be different in size from the other two.

In an exemplary embodiment of the inventive concept, each of the first to third light emitting groups may have a circular shape.

According to an exemplary embodiment of the inventive concept, a display apparatus includes a plurality of pixel units each including a first light emitting portion, a second light emitting portion, and a third light emitting portion which emit different color light. The display apparatus includes a thin film transistor substrate, a first pixel electrode and a second pixel electrode disposed on the thin film transistor substrate, a light emitting group defining layer disposed on the thin film transistor substrate and having an opening, a light emitting layer overlapping the first and second pixel electrodes, and disposed in the opening of the light emitting group defining layer, and an opposite electrode disposed on the light emitting layer. The first pixel electrode and the second pixel electrode may be included in the first light emitting portions of two different pixel units.

In an exemplary embodiment of the inventive concept, the display apparatus may further include a light emitting portion defining layer disposed in the opening of the light emitting group defining layer. The light emitting portion defining layer may be disposed between the first electrode and the second pixel electrode. The light emitting group defining layer may include a liquid repellent material, and the light emitting portion defining layer may include a lyophilic material.

In an exemplary embodiment of the inventive concept, the first light emitting portion, the second light emitting portion, and the third light emitting portion of one pixel unit may be arranged in a triangular shape.

According to an exemplary embodiment of the inventive concept, a display apparatus has a display area including first, second, third, and fourth columns arranged sequentially in a first direction and first, second, third, and fourth rows arranged sequentially in a second direction crossing the first direction. The display apparatus includes first light emitting groups disposed only in the first and third rows and only in the first and third columns, second light emitting groups disposed only in the second and fourth rows and only in the second and fourth columns, and third light emitting groups disposed in the first to fourth rows and the first to fourth columns. Each of the third light emitting groups is disposed between adjacent light emitting groups of the first light emitting groups. The first, second, and third light emitting groups emit different color light. A number of light emitting portions included in each of the third light emitting groups is less than a number of light emitting portions included in each of the first light emitting groups.

