LIQUID CRYSTAL DISPLAY, CONTROL METHOD THEREOF AND ELECTRONIC DEVICE
First Claim
1. A liquid crystal display comprising:
- a liquid crystal element in which a liquid crystal layer is sandwiched by a first electrode and a second electrode;
a driving circuit configured to apply, between the first electrode and the second electrode, a voltage for resetting a voltage maintained in the liquid crystal element and thereafter to apply, to the first electrode, a voltage higher than a predetermined voltage and a voltage lower than the predetermined voltage at different timings;
a detection circuit configured to detect a current flowing through the second electrode;
a comparison circuit configured to designate, as a reference value, the current flowing through the second electrode when the voltage maintained in the liquid crystal element is reset, to specify a first current which is obtained by excluding a charging current due to application of a related higher voltage from currents flowing through the second electrode when the higher voltage is applied to the first electrode, and a second current which is obtained by excluding a charging current due to application of a related lower voltage from currents flowing through the second electrode when the lower voltage is applied to the first electrode, and to compare the first current with the second current; and
a control circuit configured to control the first current and the second current based on the comparison result.
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Accused Products
Abstract
A liquid crystal display, applying to the first electrode, a voltage higher and a voltage lower at different timings, detecting a current flowing through the second electrode, designating, as a reference value, the current flowing through the second electrode when the voltage maintained in the liquid crystal element is reset, specifying a first current which is obtained by excluding a charging current due to application of a related higher voltage from currents flowing through the second electrode after the higher voltage is applied to the first electrode, and a second current which is obtained by excluding a charging current due to application of a related lower voltage from currents flowing through the second electrode after the lower voltage is applied to the first electrode, and comparing the first current with the second current, and controlling the first current and the second current based on the comparison result.
20 Citations
10 Claims
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1. A liquid crystal display comprising:
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a liquid crystal element in which a liquid crystal layer is sandwiched by a first electrode and a second electrode; a driving circuit configured to apply, between the first electrode and the second electrode, a voltage for resetting a voltage maintained in the liquid crystal element and thereafter to apply, to the first electrode, a voltage higher than a predetermined voltage and a voltage lower than the predetermined voltage at different timings; a detection circuit configured to detect a current flowing through the second electrode; a comparison circuit configured to designate, as a reference value, the current flowing through the second electrode when the voltage maintained in the liquid crystal element is reset, to specify a first current which is obtained by excluding a charging current due to application of a related higher voltage from currents flowing through the second electrode when the higher voltage is applied to the first electrode, and a second current which is obtained by excluding a charging current due to application of a related lower voltage from currents flowing through the second electrode when the lower voltage is applied to the first electrode, and to compare the first current with the second current; and a control circuit configured to control the first current and the second current based on the comparison result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification