Electronic display system, electronic paper writing device, electronic paper and method for manufacturing the same
First Claim
1. A writing device that transmits an electromagnetic wave to a receiving device, the writing device comprising:
- a first antenna unit;
an equivalent load receiving unit; and
a control unit; and
a second antenna unit,the first antenna unit receiving the electromagnetic wave transmitted from the second antenna unit,the equivalent load receiving unit outputting a first signal, the first signal relating a first power of the electromagnetic wave, the first power relating a second power of electromagnetic wave that is received by the receiving device,the control unit controlling a third power of the electromagnetic wave to be transmitted from the second antenna unit based on the first signal.
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Accused Products
Abstract
Aspects of the invention provide an electronic paper display system that can include an electronic paper and the writing device. The writing device transmits power and baseband signals by using an electromagnetic coupling between a coil of the writing device and a coil of the electronic paper. The baseband signals, which are encoded by the writing device, are decoded by a decoder of the electronic paper and fed to the control circuit to illustrate images on a bi-stable display unit. The electronic paper has a power storage that temporarily stores power transmitted by using electromagnetic coupling for absorbing fluctuation of power in both transmission and consumption. The asynchronous design of this invention brings both robustness and low-power consumption.
25 Citations
15 Claims
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1. A writing device that transmits an electromagnetic wave to a receiving device, the writing device comprising:
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a first antenna unit; an equivalent load receiving unit; and a control unit; and a second antenna unit, the first antenna unit receiving the electromagnetic wave transmitted from the second antenna unit, the equivalent load receiving unit outputting a first signal, the first signal relating a first power of the electromagnetic wave, the first power relating a second power of electromagnetic wave that is received by the receiving device, the control unit controlling a third power of the electromagnetic wave to be transmitted from the second antenna unit based on the first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A writing device for transmitting an electromagnetic wave to a receiving device, the writing device comprising:
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an equivalent load receiving unit configured to compare a target value of the receiving device with an actual electromagnetic wave value of the electromagnetic wave transmitted from a second antenna unit in order to adjust the actual electromagnetic wave value of the electromagnetic wave, the equivalent load receiving unit including; a first antenna unit configured to receive the electromagnetic wave transmitted from the second antenna unit by mutual induction; and a control unit configured to adjust the actual electromagnetic wave value of the electromagnetic wave and transmit the electromagnetic wave by mutual induction, the control unit including; the second antenna unit configured to transmit the electromagnetic wave. - View Dependent Claims (14, 15)
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Specification