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US 12,609,085 B2Granted
Display device
AssigneeMagnolia White Corporation
InventorMasahiro Kubota
Life of this patent
Estimating the term…
Abstract
A display device includes a display area including a plurality of pixels arrayed next to one another in a first direction and in a second direction that is different from the first direction, and a control circuit, wherein each of the pixels includes a light-emitting element configured to emit light by a current flowing therethrough, a drive transistor, a shut-off transistor, and a holding capacitance.
Claims4
A driving circuit for a light-emitting display comprising:
- a video voltage signal terminal outputting a video voltage signal for display;
- an initialization voltage signal terminal outputting an initialization voltage signal for an offset cancelling operation;
- and
- an emission control signal terminal outputting an emission control signal for controlling a power supply to a light-emitting element of the light emitting display and a black-insertion ratio, wherein
- the emission control signal is configured to supply a power voltage while the initialization voltage is written into the light-emitting element, and then shut off the power voltage while the video voltage signal is written into the light-emitting element, and then supply the power voltage in an emission-enabled period at a black insertion rate which is a ratio of a period in which the power voltage is shut off to a period of the emission-enabled period,
- a luminance set value corresponds to the black insertion rate and a voltage difference between the initialization voltage signal and the video voltage signal,
- as the luminance set value gets lower, the black insertion rate and the initialization voltage get higher, and
- a difference in black insertion rate increases relative to a difference in the initialization voltage, as the luminance set value gets lower, and as the initialization voltage gets higher.
5 more elements
A driving circuit for a light-emitting display comprising:
- a video voltage signal terminal outputting a video voltage signal for display;
- an initialization voltage signal terminal outputting an initialization voltage signal for an offset cancelling operation;
- an emission control signal terminal outputting an emission control signal for controlling a power supply to a light-emitting element of the light emitting display and a black-insertion ratio;
- a lighting control signal terminal outputting a lighting control signal, a power voltage being switched to be supplied from being shut off by the lighting control signal before a voltage signal is output;
- and
- a reset control signal terminal supplying a reset potential to the light emitting element when the power voltage is shut off,
- wherein
- the emission control signal is configured to supply the power voltage while the initialization voltage is written into the light-emitting element, and then shut off the power voltage while the video voltage signal is written into the light-emitting element, and then supply the power voltage in an emission-enabled period at a black insertion rate which is a ratio of a period in which the power voltage is shut off to a period of the emission-enabled period,
- a luminance set value corresponds to the black insertion rate and a voltage difference between the initialization voltage signal and the video voltage signal,
- as the luminance set value gets lower, the black insertion rate and the initialization voltage get higher, and
- a difference in black insertion rate increases relative to a difference in the initialization voltage, as the luminance set value gets lower, and as the initialization voltage gets higher.
8 more elements
Dependencies are inferred from the claim text.