Color display device emitting each color light for different time period
AssigneeCitizen Holdings Co., Ltd.
InventorTakashi Akiyama
Life of this patent
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Abstract
A display device includes a light source that emits a plurality of color lights, and a liquid crystal panel that controls transmission or reflection of the color light from the light source. One field is divided into a plurality of subfields: fr, fg and fb. A specific color light is emitted for at least a partial time of each subfield. An image corresponding to the specific color light is displayed on the liquid crystal panel. Durations of the subfields fr, fg and fb are set to be different from any other subfield in same field. A reflection-type gradation displaying is executed based on a combination of the durations of the subfields.
Claims20
A display device, comprising:
- a light source that emits N color lights, where N is a positive integer other than unity;
- and
- a displaying unit that controls either of transmission or reflection of the color light from the light source and reflection of an external light, wherein
- one field is divided into N subfields,
- a specific color light among the N lights is emitted for at least a partial time of the subfield,
- a transmission-type color displaying is executed by displaying an image corresponding to the specific color light on the displaying unit,
- a duration of a subfield is set to be different from a duration of any other subfield in same field, and
- a reflection-type gradation displaying using the external light is executed based on a combination of the durations of the subfields,
- wherein a duration of a subfield for a color light with higher visibility is set to be longer than a duration of a subfield for a color light with lower visibility among the N subfields, while a light emitting time for the color light with the higher visibility is set to be equal to a light emitting time for a color light with lower visibility.
A display device, comprising:
- a light source that emits N color lights, where N is a positive integer other than unity;
- and
- a displaying unit that controls either of transmission or reflection of the color light from the light source and reflection of an external light, wherein
- one field is divided into N subfields,
- a specific color light among the N color lights is emitted for at least a partial time of the subfield,
- a transmission-type color displaying is executed by displaying an image corresponding to the specific color light on the displaying unit,
- the subfield includes a writing time for which image data are written into the displaying unit and a displaying time for which an image is displayed based on the written data,
- a duration of a displaying time in the subfield is set to be different from a duration of any other displaying time in the subfield in same field, and
- a reflection-type gradation displaying using the external light is executed based on a combination of durations of the displaying time in the subfields, wherein
- the displaying time includes a light-emitting time for which the color light is emitted and a non-light emitting time for which the color light is not emitted, and
- a duration of a non-light emitting time of the displaying time is set to be different from a duration of any other non-light emitting time of the displaying time in same field.
Dependencies are inferred from the claim text.