DISPLAY DEVICE AND PORTABLE TERMINAL
First Claim
1. A portable terminal comprising:
- a device;
a battery configured to supply a first direct current power to the device;
an antenna;
a power source circuit configured to generate a second direct current power from a signal received by the antenna; and
a selector circuit configured to select the power source circuit as a power source of the device when the antenna receives the signal.
0 Assignments
0 Petitions
Accused Products
Abstract
In order to increase the continuous operating time of a display device driven by a battery or the like, and a portable information terminal using the same, the volume and weight of the battery are increased. Thus, there arises a trade-off between the increased capacity of the battery and the portability of the device/terminal. Therefore, the invention provides a display device with portability ensured, which is capable of operating continuously for long periods and a portable information terminal using the same. In the display device, TFTs and an RFID tag are formed over the same insulating substrate. The RFID tag detects signals from a reader/writer, and generates DC power based on the signals. While the RFID tag is detecting signals, the display device is driven by the DC power generated in the RFID tag.
-
Citations
13 Claims
-
1. A portable terminal comprising:
-
a device; a battery configured to supply a first direct current power to the device; an antenna; a power source circuit configured to generate a second direct current power from a signal received by the antenna; and a selector circuit configured to select the power source circuit as a power source of the device when the antenna receives the signal. - View Dependent Claims (2, 3)
-
-
4. A portable terminal comprising:
-
a display portion; a battery configured to supply a first direct current power to the display portion; an antenna; a power source circuit configured to generate a second direct current power from a signal received by the antenna; and a selector circuit configured to select the power source circuit as a power source of the display portion when the antenna receives the signal. - View Dependent Claims (5, 6)
-
-
7. A portable terminal comprising:
-
a first circuit comprising a first transistor formed over a substrate; a battery configured to supply a first direct current power to the first circuit; an antenna; a second circuit configured to generate a second direct current power from a signal received by the antenna, the second circuit comprising a second transistor formed over the substrate; and a third circuit configured to select the second circuit as a power source of the first circuit when the antenna receives the signal, the third circuit comprising a third transistor formed over the substrate. - View Dependent Claims (8, 9, 10)
-
-
11. A portable terminal comprising:
-
a first circuit; a battery configured to supply a first direct current power to the first circuit; and an RFID tag comprising; an antenna; a second circuit configured to generate a second direct current power from a signal received by the antenna; and a third circuit configured to select the second circuit as a power source of the first circuit when the antenna receives the signal. - View Dependent Claims (12, 13)
-
Specification