Display device and electronic apparatus
View Patent ↗To provide a display device and the like capable of assisting operations by effectively presenting a sense of texture to the skin of human beings while suppressing generation of unpleasant noises. The display device includes: a visual sense display unit which displays an operation screen to be a target of touch operations done by a user by image signals supplied from outside; and a plate-type tactual sense presenting unit which is disposed on the upper side of the visual sense display unit and presents a tactual sense that can be perceived by the user on the operation screen. The tactual sense presenting unit includes X-electrodes and Y-electrodes which exhibit transparency for visible light rays and operate by voltage signals supplied from outside, and a resin exhibiting transparency for visible light rays is filled in a layered-state gap between the visual sense display unit and the tactual sense presenting unit.
1. A display device, comprising:
a plate-type visual sense display unit which displays a screen by an image signal supplied from outside; and a plate-type tactual sense presenting unit which is disposed to oppose to the visual sense display unit and presents a tactual sense that can be perceived by a user on the screen, wherein:
the tactual sense presenting unit comprises electrodes and an insulating film that covers the electrodes and is structured to present the tactual sense to the user by generating an electrostatic force between the electrodes and the user by a voltage signal given to the electrodes from outside; and
the display device further comprises a resin exhibiting transparency for a visible light ray and having an elasticity modulus less than 100 kPa, which is filled in a gap between the visual sense display unit and the tactual sense presenting unit.
2. The display device as claimed in claim 1 , wherein:
the tactual sense presenting unit comprises: a supporting substrate, a plurality of mutually parallel X-electrodes extended along a first direction on the supporting substrate, a plurality of mutually parallel Y-electrodes which are extended along a second direction on the supporting substrate and insulated mutually from the X-electrodes; and
a driving circuit which applies a voltage signal of a first frequency to the X-electrode corresponding to information of a target region inputted from outside among each of the X-electrodes, applies a voltage signal of a second frequency to the Y-electrode corresponding to information of the target region among each of the Y-electrodes, and generates electric beat oscillation in the target region by an absolute value of a difference between the first and second frequencies.
3. The display device as claimed in claim 2 , wherein:
the first and second frequencies are both 500 Hz or higher; and
there is a period where the absolute value of the difference between the first and second frequencies is larger than 10 Hz and less than 1000 Hz.
4. The display device as claimed in claim 1 , wherein:
a touch coordinate detection unit for detecting a content of a touch operation done by the user on an operation screen is provided to the visual sense display unit.
5. The display device as claimed in claim 1 , wherein
the tactual sense presenting unit includes a tactual sense presenting function which generates an electrostatic force that can be perceived by the user by input of the voltage signal at a position corresponding to a displayed object that is displayed on an operation screen.
6. The display device as claimed in claim 1 , wherein
the elastic body is filled in the gap in a layered state between the visual sense display unit and the tactual sense presenting unit, the elastic body is covering an entire display region of the visual sense display unit.
7. The display device as claimed in claim 6 , comprising a chassis which has an aperture for exposing the entire display region and houses the visual sense display unit, wherein
the elastic body is filled in the gap in a layered state between the visual sense display unit and the tactual sense presenting unit, the elastic body is covering an entire part of the aperture.
8. The display device as claimed in claim 1 , wherein
the visual sense display unit and a supporting structural body for supporting the visual sense display unit are joined by a non-elastic body.
9. The display device as claimed in claim 1 , wherein
the elastic body is an active energy type curable resin, a thermosetting resin, a moisture curable resin, or a composite type curable resin that is a composition of those resins.
10. The display device as claimed in claim 1 , wherein
the elastic body filled between the gap in a layered state between the visual sense display unit and the tactual sense presenting unit is set to have a higher elasticity modulus in a fringe part than an elasticity modulus in a center part.
11. The display device as claimed in claim 10 , wherein
the elastic body is a curable resin, and a curing rate in the fringe part is higher than a curing rate in the center part.
12. The display device as claimed in claim 1 , further comprising:
a resin exhibiting transparency for a visible light ray and having an elasticity modulus less than 100 kPa, which is filled in a gap between the visual sense display unit and the tactual sense presenting unit so that sounding is suppressed.
13. An electronic apparatus, comprising the display device as claimed in claim 1 built-in for displaying information.