Self-luminous display
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMasashi Okabe, Mitsuo Inoue, Shuji Iwata, Takashi Yamamoto
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Abstract
An object of the present invention is to prevent, in a driving circuit of a spontaneous light emitting type display device using an active matrix method, a noise current from flowing in a light emitting element when compensating for a threshold voltage of a transistor for controlling current flowing to the emitting element to thereby enhance precision in a luminance. The device is so constituted that a switching element capable of short-circuiting electrodes of the spontaneous light emitting element to set the switching element in a conduction state for a period in which the noise current flows the light emitting element and to make the noise current bypass the switching element for flowing.
Claims3
A spontaneous light emitting type display device with a driving circuit comprising:
- a selection line for selecting a pixel over which a luminance control is to be carried out, a luminance data line for supplying a voltage corresponding to a luminance, a first transistor which is brought into a conduction state or a non-conduction state in response to a signal of the selection line, a first and a second capacitors for holding a voltage from the luminance data line, a second transistor for controlling a current value of a spontaneous light emitting element, a third transistor for connecting or blocking a gate and a drain in the second transistor, a first control signal line for supplying a signal voltage to control the third transistor into a conduction state or a non-conduction state, a fourth transistor for connecting or blocking the spontaneous light emitting element and the second transistor, a second control signal line for supplying a signal voltage to control the fourth transistor into a conduction state or a non-conduction state, and a voltage supply line for supplying a voltage to the spontaneous light emitting element, wherein the device is provided with a switching element capable of short-circuiting electrodes of the spontaneous light emitting element.
Dependencies are inferred from the claim text.