Image reading apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorYoichi Nakamura
Life of this patent
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Abstract
An image reading apparatus includes a light source for irradiating light to an original image, a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal, and a control mechanism for adjusting an emission region of the light source to a size of the original image. The light source includes a surface-emitting electroluminescent device that emits light of wavelengths corresponding to at least the three primary colors.
Claims22
An image reading apparatus including a light source which emits light and irradiates the light to an original image, and a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal, the apparatus comprising:
- a surface-emitting electroluminescent device serving as the light source and emitting light of wavelengths corresponding to at least the three primary colors;
- and
- a temperature adjusting mechanism for stabilizing a temperature with respect to heat generated by the electroluminescent device.
An image reading apparatus including a light source which emits light and irradiates the light to an original image, and a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal, the apparatus comprising:
- a surface-emitting electroluminescent device serving as the light source and emitting light of wavelengths corresponding to at least the three primary colors;
- and
- a temperature adjusting mechanism for stabilizing a temperature with respect to heat generated by the electroluminescent device;
- and
- a switching mechanism for causing the electroluminescent device to emit the light of the individual colors in time series.
An image reading apparatus including a light source which emits light and irradiates the light to an original image, and a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal, the apparatus comprising:
- a surface-emitting electroluminescent device serving as the light source and emitting light of wavelengths corresponding to at least the three primary colors;
- and
- a temperature adjusting mechanism for stabilizing a temperature with respect to heat generated by the electroluminescent device;
- and
- a light-quantity equalizing mechanism for equalizing a quantity of light emitted from the electroluminescent device in a predetermined region, the light-quantity equalizing mechanism being provided between the electroluminescent device and the original image.
An image reading apparatus including a light source which emits light and irradiates the light to an original image, and a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal, the apparatus comprising:
- a surface-emitting electroluminescent device serving as the light source and emitting light of wavelengths corresponding to at least the three primary colors;
- and
- a temperature adjusting mechanism for stabilizing a temperature with respect to heat generated by the electroluminescent device,
- wherein the wavelengths of the light emitted from the electroluminescent device comprise a wavelength corresponding to infrared light.
An image reading apparatus comprising:
- a light source for irradiating light to an original image;
- a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal;
- and
- a control mechanism for adjusting an emission region of the light source to a size of the original image;
- wherein the light source includes a surface-emitting electroluminescent device that emits light of wavelengths corresponding to at least the three primary colors.
An image reading apparatus comprising:
- a light source for irradiating light to an original image;
- and
- a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal;
- wherein the light source includes a surface-emitting electroluminescent device that emits light of wavelengths corresponding to at least the three primary colors, and wherein the wavelengths of the light emitted from the light source comprise a wavelength corresponding to infrared light.
An image reading method using an image reading apparatus, the method comprising the steps of:
- (a) conveying an original image to a predetermined position and stopping the original image thereat;
- (b) driving an electroluminescent device which serves as a light source, and discretely irradiating the original image with light of each of three primary colors;
- (c) condensing and detecting light that has transmitted through the original image;
- and
- (d) transducing density data of the detected light of each of the colors into digital data, and storing the digital data.
A method of manufacturing a light source for an image reading apparatus, the method comprising the steps of:
- (a) forming a light-emissive layer for a surface-emitting electroluminescent device;
- and
- (b) separately vapor-depositing the light-emissive layer for each of the three primary colors such that the light-emissive layer emits light of each of the three primary colors.
An image reading apparatus comprising:
- a light source for irradiating light to an original image;
- a photoelectric transducing device for detecting reflected or transmitted quantities of the irradiated light, and for transducing the light into an electric signal;
- and
- a control mechanism for adjusting an emission region of the light source to a size of the original image;
- wherein the light source includes a surface-emitting electroluminescent device that emits light of wavelengths corresponding to at least the three primary colors and a surface-emitting electroluminescent device that emits infrared light.
Dependencies are inferred from the claim text.