Display panel with pressure sensor and electronic device with pressing input function
First Claim
Patent Images
1. A display comprising:
- a display panel including an image forming panel that controls light emitted to a front face side thereof to form a displayed image, and a polarizing plate disposed at the front face side of the image forming panel;
a pressure sensor having a piezoelectric film formed of a first at least uniaxially drawn polylactic acid;
a flexible buffer member between the pressure sensor and the image forming panel, and directly adjacent the front face side of the image forming panel; and
a phase compensating film adjacent the pressure sensor, the phase compensating film formed of a second at least uniaxially drawn polylactic acid, whereinboth the pressure sensor and the phase compensating film are disposed between the mage forming panel and the polarizing plate,a first uniaxial drawing direction of the piezoelectric film is orthogonal to a second uniaxial drawing direction of the phase compensating film, andan angle between the first uniaxial drawing direction of the piezoelectric film and the second uniaxial drawing direction of the phase compensating film cancels an effect of birefringence on the light wave penetrating the piezoelectric film and the phase compensating film.
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Abstract
An electronic device with pressing input function includes a substantially rectangular parallelepiped-shaped housing. A pressure sensor, a display panel, a protective member, and an arithmetic circuit module are disposed in the housing. In the display panel, a front polarizing plate is disposed on a front face of a liquid crystal panel. The pressure sensor includes piezoelectric films having birefringence, and electrodes formed on opposed faces of one of the piezoelectric films. The pressure sensor is disposed between the liquid crystal panel and the front polarizing plate. The piezoelectric films are arranged such that their uniaxial drawing directions are orthogonal to each other.
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Citations
10 Claims
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1. A display comprising:
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a display panel including an image forming panel that controls light emitted to a front face side thereof to form a displayed image, and a polarizing plate disposed at the front face side of the image forming panel; a pressure sensor having a piezoelectric film formed of a first at least uniaxially drawn polylactic acid; a flexible buffer member between the pressure sensor and the image forming panel, and directly adjacent the front face side of the image forming panel; and a phase compensating film adjacent the pressure sensor, the phase compensating film formed of a second at least uniaxially drawn polylactic acid, wherein both the pressure sensor and the phase compensating film are disposed between the mage forming panel and the polarizing plate, a first uniaxial drawing direction of the piezoelectric film is orthogonal to a second uniaxial drawing direction of the phase compensating film, and an angle between the first uniaxial drawing direction of the piezoelectric film and the second uniaxial drawing direction of the phase compensating film cancels an effect of birefringence on the light wave penetrating the piezoelectric film and the phase compensating film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification