Light amount measurement device and control method therefor
AssigneeCanon Kabushiki Kaisha
InventorsTakehito Fukushima, Hironobu Hoshino
Life of this patent
Estimating the term…
Abstract
A light amount measurement device includes: a light source unit including a light source; a display unit including a transmissive panel that transmits light emitted from the light source; a light reception unit configured to measure an amount of light that has passed through the display unit; and a control unit configured to control, during calibration of the display unit, a brightness measured by the light reception unit to a higher brightness than an ideal brightness corresponding to a measurement gradation, by either increasing the light amount emitted by the light source or increasing a transmittance of the display unit.
Claims16
A light amount measurement device comprising at least one memory and at least one processor which function as:
- a light source unit including a light source;
- a display unit including a transmissive panel that transmits light emitted from the light source;
- a light reception unit configured to measure an amount of light that has passed through the display unit;
- and
- a control unit configured to control, during calibration of the display unit, a brightness measured by the light reception unit to a higher brightness than an ideal brightness corresponding to a measurement gradation, by either increasing the light amount emitted by the light source or increasing a transmittance of the display unit.
A control method for a light amount measurement device that includes a light source unit including a light source and a display unit including a transmissive panel that transmits light emitted from the light source, the control method comprising:
- a light reception step for measuring an amount of light that has passed through the display unit;
- and
- a control step of controlling, during calibration of the display unit, a brightness measured in the light reception step to a higher brightness than an ideal brightness corresponding to a measurement gradation, by either increasing the light amount emitted by the light source or increasing a transmittance of the display unit.
A non-transitory computer readable medium that stores a program, w % herein the program causes a light amount measurement device, which includes a light source unit including a light source and a display unit including a transmissive panel that transmits light emitted from the light source, to execute:
- a light reception step for measuring an amount of light that has passed through the display unit;
- and
- a control step of controlling, during calibration of the display unit, a brightness measured in the light reception step to a higher brightness than an ideal brightness corresponding to a measurement gradation, by either increasing the light amount emitted by the light source or increasing a transmittance of the display unit.
Dependencies are inferred from the claim text.