US 11,079,529 B2Granted

N4 phase retardation film, display apparatus and manufacturing method thereof

AssigneeSamsung Display Co., Ltd.

InventorDukjin Lee

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Abstract

A display apparatus includes a polarizer, a phase retardation film, a touch member, and a display panel. The polarizer has a transmitting axis and is configured to linearly polarize external light to be parallel to the transmitting axis. The phase retardation film is on the polarizer and has a first optical axis. The touch member has a second optical axis and comprises a touch substrate on the polarizer and touch electrodes on the touch substrate. The display panel is on the polarizer. When a first in-plane retardation value of the phase retardation film is Rp1, a second in-plane retardation value of the touch member is Rp2, a phase retardation value within a target surface is Rpg, and a is a constant, an equation Rp1=Rpg−a*Rp2 is satisfied.

Claims10

Dependent claims

A display apparatus comprising:

a polarizer to linearly polarize incident light in a direction parallel to a transmitting axis;
a phase retardation film under the polarizer and configured to retard light passing through the polarizer by a first phase retardation value;
a touch member under the phase retardation film, the touch member comprising a touch substrate to retard light passing through the phase retardation film by a second phase retardation value and a touch electrode directly under the touch substrate;
and
a display panel under the touch member and configured to reflect light passing through the touch member,
wherein the phase retardation film and the touch member are configured to delay the incident light by a target phase retardation value, and the first phase retardation value is based on the target phase retardation value and the second phase retardation value.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/673,798Filed 4 Nov 2019 · continuation
Priority: KR 10-2016-00027338 Jan 2016
Published: US 2020/0064529 A127 Feb 2020
Granted: 3 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G02B 5/3083
Polarising elements: birefringent or phase retarding elements
G06F 3/0412
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: digitisers structurally integrated in a display
H10K 59/8791
Constructional details: arrangements for improving contrast, e.g. preventing reflection of ambient light
G02B 5/3058
Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state: comprising electrically…

Family

Application15/376,404Parent of this continuation · filed 12 Dec 2016
US 2020/0064529 A1Pre-grant publication · published 27 Feb 2020
US 10,466,399 B2Parent of this continuation
US 2017/0199312 A1Published application
US 11,079,529 B2This patent

From the US filing history. Foreign family members aren’t listed.

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