Image display apparatus
AssigneeCanon Kabushiki Kaisha
InventorRyota Kadowaki
Life of this patent
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Abstract
Provided is the image display apparatus including: the light source which emits excitation light; a phosphor which converts the excitation light into fluorescent light and rotates; an image display element which modulates the fluorescent light; and a control unit which controls the image display element so that the image display element repeats first displaying based on an image signal and second displaying which is darker than the first displaying, at a predetermined frequency, wherein when a higher frequency of the predetermined frequency and a rotation frequency of the phosphor is represented by Fhigh, and a lower frequency thereof is represented by |Fhigh/2−Flow|<15.
Claims11
An image display apparatus comprising:
- a light source which emits excitation light;
- a phosphor which converts the excitation light into fluorescent light and rotates;
- an image display element which modulates the fluorescent light;
- and
- a control unit which controls the image display element so that the image display element repeats first displaying based on an image signal and second displaying which is darker than the first displaying, at a predetermined frequency, wherein
- the control unit can be operated in a moving image display mode which repeats the first displaying and the second displaying, and in a still image display mode which does not repeat the first displaying and the second displaying, and
- in a case of operating in the moving image display mode, when a higher frequency of the predetermined frequency and a rotation frequency of the phosphor is represented by Fhigh, and a lower frequency thereof is represented by Flow,
- the frequencies satisfy a relationship of:
- |Fhigh/2−Flow|<15.
An image display apparatus comprising:
- a light source which emits excitation light;
- a phosphor which converts the excitation light into fluorescent light and rotates;
- an image display element which modulates the fluorescent light;
- and
- a control unit which controls the image display element so that the image display element repeats first displaying based on an image signal and second displaying which is darker than the first displaying, at a predetermined frequency, wherein
- when a higher frequency of the predetermined frequency and a rotation frequency of the phosphor is represented by Fhigh, and a lower frequency thereof is represented by Flow, a flicker frequency of the light source is represented by A and the predetermined frequency is represented by C,
- the frequencies satisfy relationships of:
- |Fhigh/2−Flow|<15, and
- 0.95×m×C≦n×A≦1.05×m×C (where n and m are natural numbers).
Dependencies are inferred from the claim text.