Display System and Electrical Appliance
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsShunpei Yamazaki, Jun Koyama, Noriko Shibata
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Abstract
A display system in which the luminance of light-emitting elements in a light-emitting device is adjusted based on information on an environment. A sensor obtains information on an environment as an electrical signal. A CPU converts, based on comparison data set in advance, the information signal into a correction signal for correcting the luminance of EL elements. Upon receiving this correction signal, a voltage changer applies a predetermined corrected potential to the EL elements. Thus, this display system enables control of the luminance of the EL elements.
Claims29
An electrical appliance comprising:
- an EL (electro-luminescent) element having a first electrode and a second electrode;
- a sensor for obtaining an information signal of an environment;
- a CPU (central processing unit) for converting said information signal of the environment supplied from said sensor into a correction signal;
- an EL driving power source;
- and
- a voltage changer connected to receive the correction signal and an output of the EL driving power source, and configured to produce an output potential that varies based on the correction signal,
- wherein the output potential of the voltage changer is electrically connected to the second electrode of the EL element via a switch,
- wherein the first electrode of the EL element is electrically connected to a power supply line.
An electrical appliance comprising:
- at least an EL (electro-luminescent) element having two electrodes with an EL layer interposed therebetween;
- an EL driving power source;
- and
- a voltage changer connected to receive an information signal of an environment and an output of the EL driving power source, and to produce an output potential electrically connected to the other of said two electrodes of said EL element via a switch, wherein the voltage changer is configured to vary the output potential based on the information signal.
An electrical appliance comprising:
- a sensor for obtaining an information signal of an environment;
- a voltage changer connected to receive an output of an EL driving power source and a corrected potential generated by converting the information signal, and to generate an output potential that varies based on the corrected potential;
- and
- an EL (electro-luminescent) element comprising at least an EL layer between an anode and a cathode, one of said anode and said cathode being electrically connected to said active layer,
- wherein the output potential of the voltage changer is electrically connected to the other of the anode and the cathode of said EL element via a switch.
An electrical appliance comprising:
- a sensor for obtaining an information signal of an environment;
- a voltage changer connected to receive the information signal and an output of an EL driving power source, and to generate an output potential that varies based on the information signal;
- and
- an EL (electro-luminescent) element comprising at least an EL layer between an anode and a cathode, one of said anode and said cathode being electrically connected to said active layer,
- wherein the output potential of the voltage changer is electrically connected to the other of the anode and the cathode of said EL element via a switch.
An electrical appliance comprising:
- a sensor for obtaining an information signal of an environment;
- a CPU (central processing unit) for converting said information signal to a corrected signal;
- a voltage changer connected to receive the corrected signal and an output of an EL driving power source, and configured to produce an output potential that varies based on the corrected signal;
- and
- an EL (electro-luminescent) element comprising at least an EL layer between an anode and a cathode, one of said anode and said cathode being electrically connected to said active layer;
- wherein the output potential of the voltage changer is electrically connected to the other of the anode and the cathode of said EL element via a switch.
Dependencies are inferred from the claim text.