What is claimed is:
1. A light source device used at the time of separating, into N color components, light which is irradiated toward an original and is one of transmitted through and reflected by the original, said light source device comprising:
a light source section formed from M light emitting elements having different emission spectrums, wherein M>N; and
a controller controlling overall spectral characteristics of light emitted from the light source section by controlling at least one of lighting and extinguishing of each of the M light-emitting elements of the light source section, emission intensity of each of the M light-emitting elements of the light source section, and emission time of each of the M light-emitting elements of the light source section.
2. The light source device according to claim 1, wherein light emitted from the light source section is irradiated onto a recording material after the light has been either transmitted through an original or reflected by an original, and the controller determines desired overall spectral characteristics on the basis of at least one of a type of spectral transmission density characteristics of the original and a type of spectral sensitivity characteristics of the recording material, and controls at least one of lighting and extinguishing of each of the M light-emitting elements of the light source section, emission intensity of each of the M light-emitting elements of the light source section, and emission time of each of the M light-emitting elements of the light source section, such that the overall spectral characteristics of the light emitted from the light source section coincide with the determined desired overall spectral characteristics.
3. The light source device according to claim 2, wherein the controller determines the desired overall spectral characteristics for the light emitted from the light source section, and when the original is a specific type, the controller selectively illuminates light emitting elements corresponding to a specific color component wavelength region according to the desired overall spectral characteristics.
4. The light source device according to claim 2, wherein the controller determines the desired overall spectral characteristics for light emitted from the light source section, and when the original is a monochrome film type, the controller either illuminates light emitting elements of at least two different color component wavelength regions, or illuminates light emitting elements of only a specific single color component wavelength region.
5. The light source device according to claim 1, wherein light emitting elements are provided in the light source section corresponding to each color component wavelength region, and light emitting elements corresponding to at least one color component wavelength region are formed from a plurality of light emitting elements each having a different emission spectrum.
6. The light source device according to claim 1, wherein the controller controls at least one of whether each light emitting element is illuminated, and light intensity of each light emitting element, in the plurality of light emitting elements of the light source section, in accordance with changes due to temperature in emission spectrums of the light emitting elements.
7. The light source device according to claim 1, wherein light emitted from the light source section is provided with a plurality of light source units, each unit of which emits light having different spectral characteristics, and the controller illuminates different light source units in accordance with a type of the original.
8. The light source device according to claim 1, wherein light emitting elements are provided in the light source section corresponding to each color component wavelength region and light emitting elements corresponding to at least one color component wavelength region are provided with a single light source unit formed from a plurality of light emitting elements each having a different emission spectrum.
9. A device for reading an original, the device comprising:
a light source section formed from M light emitting elements each having a different emission spectrum;
a sensing apparatus dividing, into N color components wherein N<M, light which has been emitted from the light source section and has been transmitted through or reflected by an original which is being read, the sensing apparatus converting the divisional color components into electric signals; and
a controller for controlling overall spectral characteristics of light emitted from the light source section by controlling at least one of lighting and extinguishing of each light emitting element, emission intensity of each light emitting element, and emission time of each light emitting element.
10. The device according to claim 9, wherein light emitting elements are provided in the light source section corresponding to each color component wavelength region, and light emitting elements corresponding to at least one color component wavelength region are formed from a plurality of light emitting elements each having a different emission spectrum.
11. The device according to claim 9, wherein the controller determines desirable spectral characteristics of light emitted from the light source section based on a type of original to be read, and the controller controls at least one of lighting and extinguishing of each of the M light-emitting elements of the light source section, emission intensity of each of the M light-emitting elements of the light source section, and emission time of each of the M light-emitting elements of the light source section such that the overall spectral characteristics of the light emitted from the light source section coincide with the determined desired overall spectral characteristics.
12. The device according to claim 9, wherein the controller controls at least one of whether each light emitting element is illuminated, light intensity of each light emitting element, and emission time of each light emitting element in the plurality of light emitting elements of the light source section, in accordance with changes due to temperature in emission spectrums of the light emitting elements.
13. The device according to claim 10, wherein at least some of the light emitting elements have an emission spectrum corresponding to a red color component wavelength region, and when the original is a reversal film, the controller controls light emitting elements having an emission spectrum corresponding to a red color component wavelength region to shift in a direction towards shorter wavelengths, relative to when the original is a negative film.
14. The device according to claim 10, wherein, based on a type of the original, the controller determines desired overall spectral characteristics for light emitted from the light source section, and when the original is a specific type, the controller selectively illuminates light emitting elements corresponding to a specific: color component wavelength region according to the desired spectral characteristics.
15. The device according to claim 9, wherein, when the original being read is a monochrome film, the controller either simultaneously illuminates each of light emitting elements of at least two different color component wavelength regions, or illuminates light emitting elements of only a specific single color component wavelength region.
16. The device according to claim 9, wherein the light source section is provided with a plurality of light source units each of which emits light having different spectral characteristics, and the controller illuminates different light source units in accordance with a type of the original being read.
17. The device according to claim 9, wherein light emitting elements are provided in the light source section corresponding to each color component wavelength region, and a light source unit is provided having light emitting elements corresponding to at least one color component wavelength region, with the light emitting elements in the light source unit each having a different emission spectrum.
18. The device according to claim 9, further comprising an image processor for performing image processing on image data obtained when the sensing apparatus outputs electrical signals from light received that has passed through or been reflected from an original under processing conditions that correspond to the controlling of the light source section by the controller.
19. The device according to claim 9, wherein the sensing apparatus divides, into N color components, light which has been transmitted through or reflected by the original and has been incident on the sensing apparatus, and the sensing apparatus carries out sensing by using a charge-accumulating-type light sensor which accumulates charges corresponding to light amounts of respective color component lights, and the sensing apparatus has an accumulating time controller which controls the charge accumulating time at the charge-accumulating-type sensor in accordance with control of the light source section carried out by the controller.
20. A method for producing light for reading an original, wherein the light is either transmitted through an original to be read or reflected by the original, and thereafter, the light is separated into N color components, and electrical signals are produced, the method comprising the steps of:
forming a light source section from M light emitting elements each having a different emission spectrum, wherein M>N;
determining a type of the original, which will be read using emitted light from the light source section;
selecting desired overall spectral characteristics for light emitted from the light source section based on the type of the original; and
providing overall spectral characteristics for light emitted from the light source section by controlling at least one of whether each of the M light emitting elements is illuminated, emission intensity of each of the M light emitting elements, and emission time of each of the M light emitting elements, in accordance with the selected overall spectral characteristics.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An in-plane switching liquid crystal display device, comprising:
first and second substrates;
a plurality of data lines on the first substrate;
a plurality of gate lines crossing the data lines on the first substrate, perpendicular to the data lines;
a plurality of pixel areas on said first substrate defined by the data and gate lines;
data electrodes and common electrodes alternately formed in each of said pixel areas, the data electrodes having a first transmittance area and the common electrodes having a second transmittance area, wherein the first transmittance area equals the second transmittance area; and
a liquid crystal layer between said first and second substrates.
2. The in-plane switching liquid crystal display device of claim 1, wherein the data electrodes and the common electrodes are on the same layer.
3. The in-plane switching liquid crystal display device of claim 1, wherein the data electrodes and the common electrodes are on different layers.
4. The in-plane switching liquid crystal display device of claim 1, further comprising at least one shielding layer on the first substrate under at least one of the common electrodes.
5. The in-plane switching liquid crystal display device of claim 4, wherein the shielding layer and the gate lines comprise a same material.
6. The in-plane switching liquid crystal display device of claim 4, wherein the shielding layer and the data lines comprise a same material.
7. The in-plane switching liquid crystal display device of claim 1, further comprising at least one shielding layer on the first substrate under at least one of the common electrodes and at least one additional shielding layer under at least one of the data electrodes such that light transmittance of the common electrodes is the same as light transmittance through the data electrodes
8. The in-plane switching liquid crystal display device of claim 7, wherein the shielding layer and the gate lines comprise a same material.
9. The in-plane switching liquid crystal display device of claim 7, wherein the shielding layer and the data lines comprise a same material.
10. The in-plane switching liquid crystal display device of claim 1, wherein a number of common electrodes having no shielding layer thereunder is equal to a number of data electrodes having no shielding layer thereunder.
11. The in-plane switching liquid crystal display device of claim 4, wherein the common electrode includes at least one outermost common electrode adjacent to at least one of said data lines; and
wherein the shielding layer is under the outermost common electrode.
12. The in-plane switching liquid crystal display device of claim 1, wherein at least one of the data electrodes has a first width, and at least one of the common electrodes has a second width, the second width being greater than the first width.
13. The in-plane switching liquid crystal display device of claim 12, wherein at least one of the data electrodes has a same width as at least one of the common electrodes.
14. The in-plane switching liquid crystal display device of claim 12, wherein the second width is 1.5 times the first width.
15. The in-plane switching liquid crystal display device of claim 12, wherein the second width is 2 times the first width.
16. The in-plane switching liquid crystal display device of claim 1, wherein at least one of the data electrodes has a first width, and at least one of the common electrodes has a second width, the first width being less than the second width.
17. The in-plane switching liquid crystal display device of claim 16, wherein the first width is one half the second width.
18. An in-plane switching liquid crystal display device, comprising:
first and second substrates;
a plurality of pixel areas on said first substrate;
data electrodes and common electrodes alternately formed in each of said pixel areas and patterned to have the same light transmitting area according to applied voltage; and
a liquid crystal layer between said first and second substrates.
19. The device of claim 18, further comprising a shielding layer under at least one of said plurality of data electrodes.
20. The device of claim 18, wherein said data electrodes and said common electrodes are formed on planes different from each other.
21. The device of claim 18, wherein said data electrodes and said common electrodes are formed on the same plane.
22. The device of claim 18, further comprising a shielding layer for shielding outermost ones of said common electrodes.
23. The device of claim 22, wherein said shielding layer is formed under said outermost ones of said common electrodes.
24. The device of claim 22, wherein said shielding layer is on said outer most ones of said common electrodes.
25. The device of claim 23, wherein said shielding layer formed on said common electrodes is integral with a black matrix on said second substrate.
26. The device of claim 18, wherein at least one of said common electrodes is wider than said data electrodes.
27. The device of claim 20, further comprising an insulation film on the data electrodes.
28. The device of claim 20, further comprising an insulation film on the common electrodes.
29. The device of claim 18, wherein said data electrodes and said common electrodes are a stripe type.
30. The device of claim 18, where in said data electrodes and said common electrodes are zigzag type.
31. The device of claim 18, further comprising gate lines and data lines defining said pixel areas; and switching devices at cross points of said gate and data lines.
32. A method of manufacturing an in-plane switching liquid crystal display device comprising:
preparing the first and second substrates;
forming a plurality of gate lines and data lines on the first substrate to define a plurality of pixel areas;
forming a plurality of data electrodes and common electrodes to be alternately formed in each pixel area and having the same light transmitting area; and
forming a liquid crystal layer between the first and second substrates.
33. The method of claim 32, wherein said step of forming a plurality of data electrodes and common electrodes includes:
forming an insulation film over a surface of the pixel area including the gate lines;
forming the data lines on the insulation film and forming a shielding layer having a predetermined width;
forming a first protective film on the surface including the shielding layer;
forming a plurality of data electrodes on the first protective film corresponding to areas between the shielding layer;
forming a second protective film on the surface including the data electrodes; and
forming common electrodes on the second protective film corresponding to areas between adjacent ones of the data electrodes.
34. The method of claim 32, wherein said step of forming a plurality of data electrodes and common electrodes includes:
forming an insulation film over a surface of the pixel area including the gate lines;
forming data lines on the insulation film and forming a shielding layer having a predetermined width;
forming a first protective film on the surface including the shielding layer;
forming a plurality of common electrodes on the first protective film;
forming a second protective film on the surface including the common electrodes; and
forming data electrodes on the second protective film corresponding to areas between adjacent ones of the common electrodes.
35. The method of claim 32, wherein said step of forming a plurality of data electrodes and common electrodes includes:
forming an insulation film over a surface of the pixel area including the gate lines;
forming data lines on the insulation film and forming a shielding layer having a predetermined width;
forming a first protective film on the surface including the shielding layer; and
alternately forming common electrodes and data electrodes on the first protective film.
36. The method of claim 33, wherein outermost ones of the plurality of common electrodes in the unit pixel are substantially vertically aligned with the shielding layer.
37. The method of claim 34, wherein outermost ones of the plurality of common electrodes in the unit pixel are substantially vertically aligned with the shielding layer.
38. The method of claim 33, further comprising the step of forming another shielding layer under at least one of the data electrodes.
39. The method of claim 34, further comprising the step of forming another shielding layer under at least one of the data electrodes.
40. The method of claim 33, wherein said shielding layer is formed of the same material as the data lines.
41. The method of claim 34, wherein said shielding layer is formed of the same material as the data lines.
42. The method of claim 38, wherein the shielding layer is formed of the same material as the data lines.
43. The method of claim 39, wherein the shielding layer is formed of the same material as the data lines.
44. The method of claim 32, wherein at least one of the plurality of common electrodes is formed wider than the data electrodes.
45. The method of claim 32, wherein the data electrodes and the common electrodes are formed of a transparent conductive material.
46. The method of claim 45, wherein the transparent conductive material is ITO.