Optical component, touchscreen panel, and display device

• US 10,274,784 B2
• Filed: 09/23/2014
• Issued: 04/30/2019
• Est. Priority Date: 09/27/2013
• Status: Active Grant

• Current Assignee: Hosiden Corporation
• Original Assignee: Hosiden Corporation
• Inventors: Shimizu, Masato
• Primary Examiner(s): Pasko, Nicholas R.
• Application Number:
  US14/493,826
• Publication Number:
  US 20150091873A1
• Time in Patent Office: 1,680 Days
• Field of Search: 3594891, 35948902, 35948903, 35948907, 349 96, 349117-121
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

An optical component including a resin part having translucency and a phase plate. The phase plate is configured to be disposed on an emitting direction side of a display part capable of emitting linearly polarized light. The resin part is uncontrolled in terms of phase difference. The phase plate is configured to be disposed between the display part and the resin part. The phase plate has three to five times as large retardation as the resin part.

Claims

1. A touchscreen panel, comprising:

an optical component, the optical component comprising;

a resin part having translucency, the resin part being configured to be disposed on an emitting direction side of a display part capable of emitting linearly polarized light, the resin part being a molded article of resin material partially having birefringence due to molecular orientation and/or photoelasticity of the resin material, or alternatively the resin part being an extruded plate of resin material having birefringence due to an extruding process of the resin material, and

a phase plate configured to be disposed between the display part and the resin part, the phase plate having a retardation that is three to five times larger than a retardation of the resin part, wherein the phase plate is fixed to a rear face of the resin part; and

an optically isotropic member including a sensor,

wherein the sensor is capable of detecting an approach of a detection target, optically isotropic, and configured to be disposed between the phase plate of the optical component and the display part,

wherein the touchscreen panel is configured such that only the optically isotropic member is disposed between the optical component and the display part.

2. A touchscreen panel, comprising:

an optical component, the optical component comprising;

a resin part having translucency, the resin part being configured to be disposed on an emitting direction side of a display part capable of emitting linearly polarized light, the resin part being a molded article of resin material partially having birefringence due to molecular orientation and/or photoelasticity of the resin material, or alternatively the resin part being an extruded plate of resin material having birefringence due to an extruding process of the resin material, and

a phase plate configured to be disposed between the display part and the resin part, wherein the retardation of the phase plate is at least 3,000 nm, and wherein the phase plate is fixed to a rear face of the resin part; and

an optically isotropic member including a sensor,

wherein the sensor is capable of detecting an approach of a detection target, optically isotropic, and configured to be disposed between the phase plate of the optical component and the display part,

wherein the touchscreen panel is configured such that only the optically isotropic member is disposed between the optical component and the display part.