WO2016204007A1 - 白色発光装置 - Google Patents
白色発光装置 Download PDFInfo
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- WO2016204007A1 WO2016204007A1 PCT/JP2016/066733 JP2016066733W WO2016204007A1 WO 2016204007 A1 WO2016204007 A1 WO 2016204007A1 JP 2016066733 W JP2016066733 W JP 2016066733W WO 2016204007 A1 WO2016204007 A1 WO 2016204007A1
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- white light
- light emitting
- color filter
- emitting device
- chromaticity
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- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 238000010586 diagram Methods 0.000 claims description 43
- 238000005401 electroluminescence Methods 0.000 claims description 18
- 230000032683 aging Effects 0.000 claims description 13
- 238000002834 transmittance Methods 0.000 claims description 8
- 238000012986 modification Methods 0.000 description 49
- 230000004048 modification Effects 0.000 description 49
- 239000003086 colorant Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009607 mammography Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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- 230000001629 suppression Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
Definitions
- the present invention relates to a white light emitting device.
- Various elements that emit white light such as a white light emitting organic EL (Electro-Luminescence) and a white LED (Light-Emitting-Diode) have been proposed as a light source such as a monitor and a light source for illumination.
- a white light emitting organic EL Electro-Luminescence
- a white LED Light-Emitting-Diode
- the color of light irradiated between different elements may be shifted, or the color of irradiated light may be shifted due to aging of the elements. For this reason, when these are used as a light source and a monitor and illumination are comprised, it causes the unevenness of the color of irradiation light, the rotation of a hue, etc.
- the present invention has been made in view of such a situation, and an object thereof is to provide a white light emitting device capable of correcting a chromaticity shift.
- an aspect of the present invention is a white light emitting device including a plurality of pixels.
- Each of the plurality of pixels includes at least two subpixels, each of the subpixels is a white light emitting element, and at least one of the at least two subpixels includes a color filter.
- the optical characteristics of the color filter are set so as to correct the chromaticity shift of the light emitted by the white light emitting element, and the white light emitting device further includes a light emission control unit that controls the light emission intensity of each of the white light emitting elements. .
- the chromaticity shift of the white light emitting element may be a chromaticity shift due to the aging of the white light emitting element.
- Each of the plurality of pixels includes at least three sub-pixels, each sub-pixel includes a color filter having different optical characteristics, and each of the sub-pixels includes a color filter of red light, green light, and blue light.
- the transmittance of at least any two of the light may be 50% or more.
- the color filter is a point-symmetrical point with respect to white in the chromaticity diagram.
- transmits the light in this position may be provided.
- the plurality of pixels may each include two subpixels, and any one of the two subpixels may include a color filter.
- the area of the sub pixel including the color filter may be smaller than the area of the sub pixel not including the color filter.
- the optical characteristic of the color filter cancels the deviation between the chromaticity of light emitted from the white light emitting element included in the white light emitting device and the chromaticity of light emitted from the white light emitting element included in another white light emitting device different from the white light emitting device. It may be set as follows.
- the white light emitting element may be a white light emitting organic EL.
- FIGS. 10A to 10F are schematic diagrams illustrating sub-pixels and color filters according to various modifications of the embodiment.
- the white light emitting device includes a light emitting surface composed of a plurality of pixels, and includes a white light emitting element for each pixel.
- a light emitting element that emits white light may have a chromaticity shift due to secular change. Further, chromaticity deviation may occur between the white light emitting elements due to manufacturing errors or the like. Therefore, in the white light emitting device according to the embodiment, each pixel is constituted by two or more subpixels, and a white light emitting element is arranged for each subpixel. Furthermore, at least one of the two or more subpixels constituting each pixel includes a color filter for correcting the chromaticity shift described above.
- the white light emitting device is configured so that the light emission luminance of the white light emitting element for each subpixel can be individually adjusted. Thereby, the chromaticity shift of the entire white light emitting device can be corrected by adjusting the light emission luminance of the white light emitting element for the subpixel including the color filter.
- the white light emitting device is a device intended to emit “white” light. Therefore, the color filter only needs to correct the chromaticity shift due to aging of the light emitting element and the chromaticity shift due to manufacturing errors. Therefore, the color filter for correcting chromaticity is not a primary color filter (for example, a filter that substantially transmits only red light, green light, and blue light) as used in a general color monitor, for example. It is enough. That is, the above-described chromaticity shift can be corrected even when a filter having a low color purity and a high light transmittance is used as compared with the primary color filter. For this reason, the white light-emitting device which concerns on embodiment can also raise the power efficiency of a white light-emitting element, and can also lengthen the lifetime of a white light-emitting element as a result.
- a primary color filter for example, a filter that substantially transmits only red light, green light, and blue light
- FIG. 1 is a diagram showing an example of a white light emitting device 100 according to an embodiment of the present invention.
- FIG. 1 illustrates an example in which two white light emitting devices, a first white light emitting device 100a and a second white light emitting device 100b, are used at the same time.
- a first white light emitting device 100a and a second white light emitting device 100b are used at the same time.
- the first white light emitting device 100a and the second white light emitting device 100b are simply referred to as “white light emitting device 100”.
- the white light emitting device 100 is a medical monitor, and more specifically, a monitor for reading an X-ray image.
- the display target of the white light emitting device 100 is a digitized X-ray transmission image of a human body, and is a gray scale image.
- the white light emitting device 100 is also a monitor for performing gray scale display.
- FIG. 1 particularly shows an example in the case of interpreting a mammogram.
- the description will be made on the assumption that the white light emitting device 100 is a medical gray scale monitor.
- the present invention can be applied to other than gray scale monitors such as lighting devices.
- FIG. 2 is a diagram schematically showing the configuration of the white light emitting device 100 according to the embodiment of the present invention.
- the white light emitting device 100 according to the embodiment includes a display unit 110 and a light emission control unit 120.
- the display unit 110 includes a plurality of pixels 112.
- reference numeral 112 is given to only one pixel in order to avoid complication.
- a rectangle having the same shape as the rectangle denoted by reference numeral 112 in the display unit 110 indicates the pixel 112.
- Each pixel 112 includes at least two subpixels 114.
- each pixel 112 is composed of three sub-pixels, a first sub-pixel 114a, a second sub-pixel 114b, and a third sub-pixel 114c.
- the first sub-pixel 114a, the second sub-pixel 114b, and the third sub-pixel 114c are collectively referred to as “sub-pixel 114” unless otherwise distinguished.
- Each subpixel 114 is a white light emitting element capable of emitting white light.
- the white light emitting element can be realized by a known light emitting element such as a white light emitting organic EL or a white LED.
- the light emission control unit 120 individually controls the light emission intensity of each of the white light emitting elements.
- At least one of the sub-pixels 114 includes a color filter 116.
- FIG. 2 shows an example in which the first subpixel 114a, the second subpixel 114b, and the third subpixel 114c include the first color filter 116a, the second color filter 116b, and the third color filter 116c, respectively. ing.
- the white light emitting device 100 is a display device for displaying a grayscale image.
- the color filter 116 is not a filter intended to display a color image.
- the color filter according to the embodiment is set so as to suppress a chromaticity shift of light emitted from a white light emitting element whose optical characteristics are sub-pixels.
- Each color filter 116 may not be a filter for generating light of so-called primary colors (red, green, and blue).
- the purity of the color of the transmitted light may be low as long as the chromaticity shift of the light emitted by the white light emitting element can be suppressed.
- the color filter 116 used by the white light emitting device 100 according to the embodiment will be described in more detail.
- FIG. 3 is a diagram showing the optical characteristics of the color filter 116 according to the embodiment of the present invention in a tabular form.
- the first color filter 116a transmits 100% of red light.
- the first color filter 116a further transmits 70% of both green light and blue light.
- the second color filter 116b transmits 100% of green light and transmits 70% of red light and blue light.
- the third color filter 116c transmits 100% of blue light and transmits 70% of red light and green light. For this reason, when white light passes through the third color filter 116c, it becomes blue light with low saturation.
- FIG. 4 is a diagram showing optical characteristics of the color filter 116 according to the embodiment of the present invention on a CIE chromaticity diagram.
- circles denoted by reference numerals 16a, 16b, and 16c indicate the chromaticity of light that passes through the first color filter 116a, the second color filter 116b, and the third color filter 116c, respectively.
- FIG. 4 also shows optical characteristics of a color filter used in a conventional color monitor as a comparative example. Specifically, the first dashed circle 18a is the chromaticity of light transmitted through the conventional red filter, the second dashed circle 18b is the chromaticity of light transmitted through the conventional green filter, and the third dashed circle 18c is the conventional blue filter. Indicates the chromaticity of the transmitted light. In FIG. 4, a rectangle 20 indicates the chromaticity of white light.
- the color filter 116 according to the embodiment has a transmitted light close to white light as compared with a color filter used in a conventional color monitor. This means that the color filter 116 according to the embodiment has higher light transmittance (light use efficiency) than the color filter used in the conventional color monitor.
- the use efficiency of the color filter 116 according to the embodiment is 80%. Therefore, the overall usage efficiency is 80%. On the other hand, the use efficiency of the color filter used in the conventional color monitor is about 30%. As described above, the color filter 116 according to the embodiment has high light use efficiency. As a result, it is possible to suppress power necessary for irradiating light with the same luminance, and to improve power efficiency.
- the color filter 116 according to the embodiment has a narrow chromaticity range of light that can be irradiated as compared with a color filter used in a conventional color monitor. Specifically, when a color filter used in a conventional color monitor is used, the color filter is within the range of a triangle whose apexes are the first dashed circle 18a, the second dashed circle 18b, and the third dashed circle 18c in FIG. Can reproduce light with chromaticity. On the other hand, the chromaticity of light that can be reproduced by the color filter 116 according to the embodiment is within a range of a triangle having three circles as vertices indicated by solid lines in FIG.
- the white light emitting device 100 according to the embodiment realizes an improvement in light use efficiency in exchange for narrowing the reproducible light chromaticity.
- the white light emitting device 100 according to the embodiment is not intended to present a full-color image, the reproducible light chromaticity is narrower than that of a color filter used in a conventional color monitor. It doesn't matter.
- the adjustment target of the white light emitting device 100 according to the embodiment that is, the optical characteristics set in the color filter 116 will be described.
- the optical characteristics of the color filter 116 according to the embodiment are set so as to suppress the chromaticity shift of the white light emitting element.
- the chromaticity shift of the white light emitting element includes at least a chromaticity shift due to aging of the white light emitting element.
- the “deviation of chromaticity of the white light emitting element” further means the chromaticity of light emitted from the white light emitting element included in a certain white light emitting device 100 and the white light emitting element included in another white light emitting device 100 different from the white light emitting device 100. May include a deviation from the chromaticity of the light emitted by the.
- FIG. 5 is a schematic diagram for explaining an example of optical characteristics of the color filter 116 according to the embodiment of the present invention. More specifically, FIG. 5 is a diagram showing a trend of aging of chromaticity of light irradiated by the white light emitting organic EL element on the CIE chromaticity diagram.
- the white light emitting device 100 uses a white light emitting organic EL element as a light source, it is known that the chromaticity of light to be irradiated changes with time.
- White light-emitting organic EL elements are made by mixing dopants for irradiating blue, green, and red light, but their emission lifetimes differ depending on colors.
- the emission lifetime of a dopant emitting blue light is shorter than the emission lifetimes of dopants emitting other colors of light.
- the irradiation amount of blue light decreases as the irradiation time increases.
- the locus drawn by the secular change of the chromaticity of the light emitted from the white light emitting organic EL element goes to yellow in the CIE chromaticity diagram as shown by the arrow 22 in FIG.
- the third color filter 116c shows a point on the locus 22 drawn by the secular change of the chromaticity of the light emitted from the white light emitting organic EL element plotted in the CIE chromaticity diagram with respect to the chromaticity of the white light in the chromaticity diagram. And has optical characteristics to transmit light at a point-symmetrical position.
- an arrow 22 'indicated by a broken line is point-symmetric with respect to the locus 22 with respect to the chromaticity of white light in the chromaticity diagram.
- the chromaticity of the light transmitted through the third color filter 116c overlaps with the arrow 22 '.
- the white light emitting device 100 increases the amount of light transmitted through the third color filter 116c in accordance with the shift caused by the aging of the chromaticity of the white light emitting element, thereby increasing the chromaticity. Misalignment can be corrected.
- the locus drawn by the secular change of the chromaticity of light emitted from the white light emitting organic EL element shown in FIG. 5 schematically shows an example.
- the property of the white light emitting element actually used by the white light emitting device 100 may be specified in advance by experiments.
- the operation of the white light emitting device 100 configured as above is as follows.
- the light emission control unit 120 controls to increase the light emission amount of the sub-pixel including the third color filter 116c.
- the third color filter 116c is designed to have an optical characteristic so as to transmit light in a direction that cancels the change in color development when the white light emitting device 100 continues to be used. For this reason, it is possible to correct the chromaticity shift of the light emitted by the white light emitting element.
- the white light emitting device 100 includes the chromaticity of light emitted from the white light emitting element included in the white light emitting device 100 and the light emitted from the white light emitting element included in another white light emitting device 100 different from the white light emitting device 100. It is also possible to cancel the deviation from the chromaticity.
- the color shift between the white light emitting devices 100 may be not only a shift due to aging of the white light emitting element but also a shift due to the manufacture of the white light emitting device.
- the white light emitting device 100 it is possible to correct the chromaticity shift of the light emitted by the white light emitting element.
- the white light emitting device 100 includes a color filter 116 for correcting aging of chromaticity of light emitted from the white light emitting element, and aging of chromaticity of light emitted from the white light emitting element. Can be corrected. Further, the light transmittance of the color filter 116 is larger than the transmittance of the color filter used in the conventional color monitor. For this reason, the electric power required for irradiating light with the same luminance can be suppressed, and the power efficiency can be improved.
- FIG. 6 is a diagram showing optical characteristics of the color filter of the color filter 116 according to the first modification of the present invention in a tabular form.
- the first color filter 116a transmits 100% of green light and blue light, but does not transmit red light.
- the second color filter 116b transmits 100% of red light and blue light and blocks green light.
- the third color filter 116c transmits 100% of red light and green light and blocks blue light. When white light passes through the third color filter 116c, it becomes yellow light.
- All the color filters 116 according to the first modification have a usage efficiency of 67%. For this reason, the use efficiency of light is high compared with the color filter used with the conventional color monitor.
- FIG. 7 is a diagram showing the optical characteristics of the color filter 116 according to the first modification of the present invention on the CIE chromaticity diagram.
- the circles denoted by reference numerals 22a, 22b, and 22c are the chromaticities of light transmitted through the first color filter 116a, the second color filter 116b, and the third color filter 116c according to the first modification, respectively. Is shown.
- the chromaticity range of light that can be reproduced by the color filter 116 according to the first modification is the chromaticity range that can be reproduced by the color filter 116 according to the embodiment shown in FIG. Wider than. Therefore, a larger color shift can be corrected by using the color filter 116 according to the first modification.
- each pixel configuring the display unit 110 includes three sub-pixels.
- each pixel constituting the display unit 110 may include only two subpixels.
- FIG. 8 is a diagram schematically showing the configuration of the white light emitting device 100 according to the second modification of the present invention.
- portions common to the white light emitting device 100 according to the embodiment described with reference to FIG. 3 will be described by omitting or simplifying them as appropriate.
- each pixel in the white light emitting device 100 includes two subpixels, a first subpixel 114a and a second subpixel 114b.
- one of the two subpixels of the first subpixel 114 a and the second subpixel 114 b includes a color filter 116.
- the second subpixel 114b includes a second color filter 116b, but the first color filter 116a does not include a color filter.
- the second color filter 116b according to the second modification may be, for example, a blue color filter used in a conventional color monitor.
- the white light-emitting organic EL element has yellow chromaticity due to a change with time. Therefore, by mixing the blue light transmitted through the second color filter 116b, it is possible to correct the change in chromaticity caused by the temporal change of the white light emitting organic EL element.
- the area of the sub-pixel including the color filter (first sub-pixel 114a) is compared with the area of the sub-pixel not including the color filter (second sub-pixel 114b). narrow.
- the use efficiency of the white light emitting device 100 as a whole and the suppression of power consumption can be realized by relatively increasing the light quantity for white light emission rather than the light quantity for correcting the chromaticity change.
- FIG. 9 is a diagram showing optical characteristics of the color filter 116 according to the second modification of the present invention in a tabular form.
- the second color filter 116b transmits 100% of blue light, but blocks red light and green light. For this reason, the light use efficiency of the second color filter 116b is 33%.
- the first sub-pixel 114a does not include a color filter. That is, it can be said that a filter that transmits 100% of red light, green light, and blue light is provided. In this case, the light use efficiency is 100%.
- the white light emitting device 100 is a medical monitor.
- the white light emitting device 100 can be applied to uses other than medical monitors.
- the present invention may be applied to lighting such as a ceiling light.
- each pixel 112 includes two or more subpixels 114, and at least one of the two or more subpixels 114 includes the color filter 116. did.
- the area of each subpixel 114 and the type of the color filter 116 are not limited to those described above, and various variations are conceivable.
- these variations will be described as fourth to ninth modifications with reference to FIG.
- the part common to each modification demonstrated below is abbreviate
- FIGS. 10A to 10F are schematic diagrams showing sub-pixels 114 and color filters 116 according to various modifications of the embodiment. More specifically, FIG. 10A is a schematic diagram illustrating a subpixel 114 and a color filter 116 according to a fourth modification of the embodiment. FIG. 10B is a schematic diagram showing the sub-pixel 114 and the color filter 116 according to the fifth modification of the embodiment. The same applies hereinafter, and FIGS. 10C to 10F are schematic diagrams showing the sub-pixel 114 and the color filter 116 according to the sixth to ninth modifications, respectively.
- FIG. 10A is a schematic diagram illustrating a subpixel 114 and a color filter 116 according to a fourth modification of the embodiment.
- one pixel 112 (not shown in FIG. 10A) includes two subpixels 114, each including a first color filter 116a and a second color filter 116b. Shows the case.
- a first circle 16a and a second circle 16b indicate the characteristics of the first color filter 116a and the characteristics of the second color filter 116b on the CIE chromaticity diagram, respectively.
- the first color filter 116a is a color filter that transmits blue light
- the second color filter 116b is a color filter that transmits yellow light that is a complementary color of blue.
- the first subpixel 114a corresponding to the first color filter 116a and the second subpixel 114b corresponding to the second color filter 116b are equal in size. Therefore, when the light transmitted through the first color filter 116a and the second color filter 116b is combined, white light is obtained.
- FIG. 10A shows an example in which the first color filter 116a transmits blue light and the second color filter 116b transmits yellow light.
- the light transmitted through the first color filter 116a and the light transmitted through the second color filter 116b only need to have a complementary color relationship, and are not limited to blue and yellow.
- the light transmitted through the first color filter 116a and the light transmitted through the second color filter 116b may be red light, cyan light, green light, and magenta light, respectively.
- the first color filter 116a according to the fourth modified example has a property of high light transmittance, although the purity of the transmitted light is lower than that of the blue filter used in the conventional color filter.
- the white light emitting device 100 including the sub-pixel 114 and the color filter 116 according to the fourth modification can adjust the color of light to be displayed and can improve the light use efficiency as compared with a conventional color monitor. be able to.
- FIG. 10B is a schematic diagram illustrating the sub-pixel 114 and the color filter 116 according to the fifth modification example of the embodiment.
- one pixel 112 includes a first subpixel 114a, a second subpixel 114b, a third subpixel 114c, and a fourth subpixel 114d.
- the first subpixel 114a does not include the color filter 116
- the second subpixel 114b to the fourth subpixel 114d include the first color filter 116a and the second color filter 116b, respectively.
- a third color filter 116c In FIG. 10B, a first circle 16a, a second circle 16b, and a third circle 16c are the characteristics of the first color filter 116a, the characteristics of the second color filter 116b, and the third, respectively, on the CIE chromaticity diagram. The characteristics of the color filter 116c are shown. Specifically, in the example illustrated in FIG. 10B, the first color filter 116a is a color filter that transmits red light, the second color filter 116b is a color filter that transmits green light, and the third color filter. A color filter 116c transmits blue light.
- the light emission area of the first subpixel 114a is larger than the light emission areas of the second subpixel 114b, the third subpixel 114c, and the fourth subpixel 114d.
- the light emission areas of the second subpixel 114b, the third subpixel 114c, and the fourth subpixel 114d are equal to each other.
- the fourth circle 16d indicates white in the CIE chromaticity diagram, and the inside of the triangle having the first circle 6a, the second circle 16b, and the third circle 16c as vertices. It is in.
- the white light emitting device 100 can adjust the color of light within a triangular range having the first circle 6a, the second circle 16b, and the third circle 16c as vertices. Similar to the example shown in FIG. 10A, also in the example shown in FIG. 10B, the transmittance of each color filter 116 is higher than that of the color filter used in the conventional color monitor. Therefore, the white light emitting device 100 including the sub-pixel 114 and the color filter 116 according to the fifth modification can adjust the color of light to be displayed and can improve the light use efficiency as compared with the conventional color monitor. Can do.
- FIG. 10C is a schematic diagram illustrating the sub-pixel 114 and the color filter 116 according to the sixth modification of the embodiment.
- one pixel 112 includes a first subpixel 114a, a second subpixel 114b, and a third subpixel 114c.
- the first sub-pixel 114a does not include the color filter 116
- the second sub-pixel 114b and the third sub-pixel 114c include the first color filter 116a and the second color filter, respectively.
- 116b a first circle 16a and a second circle 16b indicate the characteristics of the first color filter 116a and the characteristics of the second color filter 116b on the CIE chromaticity diagram, respectively.
- the characteristics of the first color filter 116a and the second color filter 116b are the same as the characteristics of the first color filter 116a and the second color filter 116b shown in FIG. is there. Therefore, the white light emitting device 100 including the sub-pixel 114 and the color filter 116 according to the sixth modification can adjust the color of light to be displayed and can improve the light use efficiency as compared with the conventional color monitor. Can do.
- FIG. 10D is a schematic diagram illustrating the sub-pixel 114 and the color filter 116 according to the seventh modification example of the embodiment.
- one pixel 112 includes a first subpixel 114a, a second subpixel 114b, a third subpixel 114c, and a fourth subpixel 114d.
- the first sub-pixel 114a does not include the color filter 116
- the second sub-pixel 114b to the fourth sub-pixel 114d include the first color filter 116a and the second color filter 116b, respectively.
- a third color filter 116c In FIG. 10D, a first circle 16a, a second circle 16b, and a third circle 16c are the characteristics of the first color filter 116a, the characteristics of the second color filter 116b, and the third circle on the CIE chromaticity diagram, respectively. The characteristics of the color filter 116c are shown. Specifically, in the example shown in FIG.
- the first color filter 116a is a color filter that transmits magenta light
- the second color filter 116b is a color filter that transmits cyan light
- the third color filter A color filter 116c transmits blue light.
- the fourth circle 15d indicates the characteristics of light emitted by the first subpixel 114a, and specifically indicates white light.
- the light emission area of the first subpixel 114a is wider than the light emission areas of the second subpixel 114b, the third subpixel 114c, and the fourth subpixel 114d.
- the light emission area of the second subpixel 114b is equal to the light emission area of the third subpixel 114c, which is smaller than the light emission area of the fourth subpixel 114d.
- the white light-emitting device 100 provided with the sub pixel 114 and the color filter 116 which concern on the 7th modification of embodiment makes the 4th sub pixel 114d light-emit.
- the chromaticity correction direction can be widened.
- FIG. 10E is a schematic diagram illustrating a subpixel 114 and a color filter 116 according to an eighth modification of the embodiment.
- one pixel 112 includes a first subpixel 114a, a second subpixel 114b, and a third subpixel 114c.
- the light emission area of the first subpixel 114a is wider than that of the second subpixel 114b and the third subpixel 114c.
- the light emission area of the second subpixel 114b is equal to the light emission area of the third subpixel 114c.
- the first sub-pixel 114a does not include the color filter 116
- the second sub-pixel 114b and the third sub-pixel 114c include the first color filter 116a and the second color filter, respectively.
- 116b a first circle 16a and a second circle 16b indicate the characteristics of the first color filter 116a and the characteristics of the second color filter 116b on the CIE chromaticity diagram, respectively.
- the third circle 16c indicates the characteristics of the light emitted by the first subpixel 114a, and specifically indicates white light.
- the first color filter 116a transmits cyan light.
- the second color filter 116b transmits reddish purple light than the first color filter 116a.
- the white light emitting device 100 including the sub-pixel 114 and the color filter 116 according to the eighth modification includes a first circle 16a, a second circle 16b, and a third circle on the CIE chromaticity diagram shown in FIG. The chromaticity of the irradiated light can be adjusted in the range inside the triangle having 16c as a vertex.
- the white light emitting device 100 including the subpixel 114 and the color filter 116 according to the eighth modification is similar to the white light emitting device 100 including the subpixel 114 and the color filter 116 according to the seventh modification. Further, it is possible to give a width in the chromaticity correction direction.
- FIG. 10F is a schematic diagram illustrating the sub-pixel 114 and the color filter 116 according to the ninth modification of the embodiment.
- one pixel 112 includes a first subpixel 114a, a second subpixel 114b, and a third subpixel 114c.
- the light emission area of the first subpixel 114a is wider than that of the second subpixel 114b and the third subpixel 114c.
- the light emission area of the second subpixel 114b is equal to the light emission area of the third subpixel 114c.
- the first sub-pixel 114a to the third sub-pixel 114c are the same color filters as the first color filter 116a to the third color filter 116c shown in FIG. 10 (b), respectively.
- a first circle 16a, a second circle 16b, and a third circle 16c are respectively a characteristic of the first color filter 116a, a characteristic of the second color filter 116b, and a third characteristic on the CIE chromaticity diagram. The characteristics of the color filter 116c are shown.
- the white light emitting device 100 including the subpixel 114 and the color filter 116 according to the ninth modification suppresses the light emission luminance of the first subpixel 114a compared to the second subpixel 114b and the third subpixel 114c. As a result, white light is generated as a whole.
- the white light emitting device 100 including the sub-pixel 114 and the color filter 116 according to the ninth modification can adjust the color of light to be displayed.
- 100 white light emitting device 110 display unit, 112 pixels, 114 subpixels, 114a first subpixel, 114b second subpixel, 114c third subpixel, 116 color filter, 116a first color filter, 116b second color filter, 116c 3rd color filter, 120 light emission control part.
Abstract
Description
上記では、カラーフィルタ116は、赤色光、緑色光、および青色光のいずれも透過する場合ついて説明した。しかしながら、カラーフィルタ116は、赤色光、緑色光、および青色光のいずれか1つは透過しないか、あるいは実質的に透過しなくてもよい。
上記では、表示部110を構成する各画素が、それぞれ3つのサブピクセルを備える場合について主に説明した。これに代えて、表示部110を構成する各画素はそれぞれ2つのサブピクセルのみを含んでもよい。
上記では、白色発光装置100の用途が医療用のモニタである場合について主に説明した。しかしながら、白色発光装置100は医療用モニタ以外の他の用途にも適用可能である。例えば、本発明はシーリングライトなどの照明に適用してもよい。
図10(a)は、実施の形態の第4の変形例に係るサブピクセル114とカラーフィルタ116とを示す模式図である。図10(a)に示す例では、1つの画素112(図10(a)には不図示)が2つのサブピクセル114を備え、それぞれが第1カラーフィルタ116aと第2カラーフィルタ116bとを備える場合を示している。図10(a)において、第1円16aおよび第2円16bは、それぞれCIE色度図上における第1カラーフィルタ116aの特性と第2カラーフィルタ116bの特性とを示している。
図10(b)は、実施の形態の第5の変形例に係るサブピクセル114とカラーフィルタ116とを示す模式図である。図10(b)に示す例では、1つの画素112が、第1サブピクセル114a、第2サブピクセル114b、第3サブピクセル114c、および第4サブピクセル114dを備える。
図10(c)は、実施の形態の第6の変形例に係るサブピクセル114とカラーフィルタ116とを示す模式図である。図10(c)に示す例では、1つの画素112が、第1サブピクセル114a、第2サブピクセル114b、および第3サブピクセル114cを備える。
図10(d)は、実施の形態の第7の変形例に係るサブピクセル114とカラーフィルタ116とを示す模式図である。図10(d)に示す例では、1つの画素112が、第1サブピクセル114a、第2サブピクセル114b、第3サブピクセル114c、および第4サブピクセル114dを備える。
図10(e)は、実施の形態の第8の変形例に係るサブピクセル114とカラーフィルタ116とを示す模式図である。図10(e)に示す例では、1つの画素112が、第1サブピクセル114a、第2サブピクセル114b、および第3サブピクセル114cを備える。図10(e)に示す例では、第1サブピクセル114aの発光面積は第2サブピクセル114bおよび第3サブピクセル114cよりも広い。また、第2サブピクセル114bの発光面積と第3サブピクセル114cの発光面積とは等しい。
図10(f)は、実施の形態の第9の変形例に係るサブピクセル114とカラーフィルタ116とを示す模式図である。図10(f)に示す例では、1つの画素112が、第1サブピクセル114a、第2サブピクセル114b、および第3サブピクセル114cを備える。図10(e)に示す例では、第1サブピクセル114aの発光面積は第2サブピクセル114bおよび第3サブピクセル114cよりも広い。また、第2サブピクセル114bの発光面積と第3サブピクセル114cの発光面積とは等しい。
Claims (7)
- 複数の画素を含む白色発光装置であって、
前記複数の画素はそれぞれ少なくとも2つのサブピクセルから構成され、当該サブピクセルそれぞれは白色発光素子であり、
前記少なくとも2つのサブピクセルのうち少なくともいずれか1つのサブピクセルはカラーフィルタを備え、
前記カラーフィルタの光学特性は、前記白色発光素子が照射する光の色度のずれを修正するように設定されており、
前記白色発光装置はさらに、前記白色発光素子それぞれの発光強度を制御する発光制御部を備える白色発光装置。 - 前記白色発光素子の色度のずれは、前記白色発光素子の経年変化による色度のずれである請求項1に記載の白色発光装置。
- 前記複数の画素はそれぞれ少なくとも3つのサブピクセルを備え、各サブピクセルはそれぞれ光学特性の異なるカラーフィルタを備えており、
各サブピクセルが備えるカラーフィルタはそれぞれ、赤色光、緑色光、および青色光のうち少なくともいずれか2つの光の透過率が50%以上である請求項1または2に記載の白色発光装置。 - 前記カラーフィルタは、CIE(Commission Internationale de l'Eclairage)色度図にプロットされた前記白色発光素子が発する光の色度の経年変化が描く軌跡上の点を、前記色度図における白色に対して点対称の位置における光を透過する光学特性を備える請求項1から3のいずれか一項に記載の白色発光装置。
- 前記複数の画素はそれぞれ2つのサブピクセルを備え、当該2つのサブピクセルのうちいずれか1つのサブピクセルはカラーフィルタを備え、
前記カラーフィルタを備えるサブピクセルの面積は、カラーフィルタを備えないサブピクセルの面積と比較して狭い請求項1または2に記載の白色発光装置。 - 前記カラーフィルタの光学特性は、前記白色発光装置が備える白色発光素子が発する光の色度と、前記白色発光装置とは異なる他の白色発光装置が備える白色発光素子が発する光の色度とのずれを打ち消すように設定されている請求項1に記載の白色発光装置。
- 前記白色発光素子は、白色発光有機EL(Electro-Luminescence)である請求項1から6のいずれか一項に記載の白色発光装置。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003178875A (ja) * | 2001-12-11 | 2003-06-27 | Asahi Glass Co Ltd | カラー有機elディスプレイ |
JP2006059775A (ja) * | 2004-08-24 | 2006-03-02 | Toppan Printing Co Ltd | カラー有機el表示装置 |
JP2011119224A (ja) * | 2009-12-04 | 2011-06-16 | Samsung Mobile Display Co Ltd | 有機発光装置 |
JP2014154226A (ja) * | 2013-02-05 | 2014-08-25 | Japan Display Inc | 有機el表示装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003178875A (ja) * | 2001-12-11 | 2003-06-27 | Asahi Glass Co Ltd | カラー有機elディスプレイ |
JP2006059775A (ja) * | 2004-08-24 | 2006-03-02 | Toppan Printing Co Ltd | カラー有機el表示装置 |
JP2011119224A (ja) * | 2009-12-04 | 2011-06-16 | Samsung Mobile Display Co Ltd | 有機発光装置 |
JP2014154226A (ja) * | 2013-02-05 | 2014-08-25 | Japan Display Inc | 有機el表示装置 |
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