Input device

An input device and input panel technology, applied in the input/output process of data processing, optics, instruments, etc., can solve the problem that it is difficult to observe the information displayed on the display panel, so as to prevent the display light from dimming or coloring, and prevent display The effect of reducing the quality and reducing the number of layers

Inactive Publication Date: 2012-12-19
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, when the user wears polarized sunglasses, it becomes very difficult to observe the information displayed on the display panel depending on the posture of the portable device.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0034] figure 1 The illustrated portable device 10 is used as a mobile phone, a portable information processing device, a portable storage device, a portable game device, and the like.

[0035] The portable device 10 has a casing 2 made of synthetic resin. The housing 2 has a recess 3 with an open top, and a circuit board on which an electronic circuit is mounted and a display panel 30 are housed in the recess 3 . The opening of the recess 3 is closed by the input device 20 according to the embodiment of the present invention. The input device 20 has a display area 20a through which display light from the display panel 30 passes, and a non-display area 20b that surrounds the display area 20a and does not transmit light.

[0036] figure 2 The shown display panel 30 is a self-luminous panel such as an electroluminescence panel. The display light emitted from the display panel 30 is not linearly polarized light, circularly polarized light, or elliptically polarized light, bu...

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PUM

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Abstract

Disclosed is an input device that can effectively prevent internal reflection of light from the outside, and moreover, with displayed light being circularly polarized light, can prevent the displayed light becoming darker or colored when viewed by a user wearing polarizing sunglasses. Of a capacitance input panel (40), a front substrate (42) and a back substrate (41) having a translucent electrode layer are each configured from a/4 retardation film, and an insulating layer (43) is formed from a polarizing film. External light (1) passes through the input panel (40), becoming circularly polarized light (2). Even if this circularly polarized light (2) reflects from the front surface (30a) or the like of a display panel (30), the reflected light is blocked by the input panel (40). Meanwhile, the display light (4) from the display panel (30) becomes circularly polarized light (6) by passing through the input panel (40). Consequently, no matter which direction the user wearing the polarizing sunglasses looks, the issue of the display light becoming darker can be resolved.

Description

technical field [0001] The present invention relates to an input device which is arranged in front of a display panel such as an electroluminescence panel or a liquid crystal display panel, and which can perform operation input through an input panel of a capacitance detection type or the like. Background technique [0002] An input device in which a light-transmitting input panel is provided on the surface of a display panel in an operation unit of various electronic equipment such as a portable device. The input panel is, for example, a capacitive detection type, and has translucent electrodes intersecting each other. When a finger touches the surface of the panel, the capacitance formed between the electrode and the finger is detected to determine the finger's contact position. [0003] In the operation unit, external light is reflected by the boundary portion of each layer, and the reflected light overlaps with a display image on the display panel to be visually observed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG02B5/3016G06F3/044G06F3/0445G06F3/0446G02B5/3083
Inventor 舛本好史
Owner ALPS ALPINE CO LTD
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