Display device and timepiece
View Patent ↗A display device that has a display panel having a front substrate, an image forming unit, and a back substrate rendered together in layers, and a wiring board layered on the back surface of the back substrate. A plurality of input/output pins are formed on the front surface of the back substrate, and a plurality of connection pins that are electrically connected to the input/output pins by respective conductor members are formed on the back surface of the wiring board.
1. A display device, comprising:
a display panel having a front substrate, an image forming unit, and a back substrate rendered together in layers;
a wiring board layered on a back surface of the back substrate;
a plurality of input/output pins formed on a front surface of the back substrate; and
a plurality of connection pins formed on a back surface of the wiring board that are electrically connected to the input/output pins by respective conductor members, wherein:
the image forming unit is sealed between the front substrate and the back substrate by a sealing member disposed in an area including an outside edge part of the image forming unit;
the sealing member covers the conductor members;
the wiring board comprises a double-sided circuit board having conductors on both front and back surfaces; and
the connection.pins have through-holes passing through the wiring board.
2. The display device described in claim 1 , wherein the image forming unit contains electrophoretic particles.
3. The display device described in claim 1 , wherein the conductor members comprise bonding wires.
4. The display device described in claim 1 , further comprising:
a drive circuit that drives the display panel disposed on the back surface of the wiring board.
5. The display device described in claim 1 , further comprising:
a temperature sensor disposed on the back surface of the wiring board.
6. The display device described in claim 1 , wherein:
the display device is incorporated in a product having a circuit board that is disposed on the back surface side of the wiring board;
the wiring board and the circuit board are pressed together with an elastic connector therebetween; and
the connector includes a conductor connecting the connection pins and the circuit board, and a dielectric elastic body.
7. The display device described in claim 1 , wherein:
a plurality of connection pins corresponding to the same input/output pins are formed in each of a first position and a second position on the back surface of the wiring board; and
a first pin group composed of a plurality of connection pins formed at the first position, and a second pin group composed of a plurality of connection pins formed at the second position, are formed on the back surface of the wiring board.