KR102701733B1 - Color filter array substrate and organic light emitting display device comprising the same - Google Patents

Abstract

The color filter array substrate according to the present invention and the organic light-emitting display device including the same can reduce the reflectance for external light without having a polarizing plate by including a blue color filter layer or a cyan color filter layer, and can implement green light, red light, and blue light through the color filter layer and the color conversion layer.

Description

Color filter array substrate and organic light emitting display device including the same {COLOR FILTER ARRAY SUBSTRATE AND ORGANIC LIGHT EMITTING DISPLAY DEVICE COMPRISING THE SAME}

The present invention relates to a color filter array substrate capable of reducing reflectivity for external light without including a polarizing plate (POL) and an organic light-emitting display device including the same.

An organic light-emitting display (OLED) is a self-luminous display device that includes a plurality of pixels, and each pixel includes sub-pixels that emit red (R), green (G), blue (B), or white (W). Each sub-pixel can emit light independently, and each sub-pixel can be distinguished by a black matrix (BM).

An organic light-emitting display device includes an organic light-emitting element that emits light, and the organic light-emitting element includes an anode, an organic light-emitting layer, and a cathode. The organic light-emitting display device can emit light in a top emission manner or a bottom emission manner, and the emission manner of the organic light-emitting display device can vary depending on the configuration of the anode and the cathode.

Fig. 1 is a cross-sectional view showing an organic light-emitting display device of a top emission type. Referring to Fig. 1, the organic light-emitting display device of a top emission type has a structure in which a thin film transistor (10), an organic light-emitting element (20), a passivation layer (30), a resin layer (40), a color filter layer (50), a transparent substrate (60), and a polarizing plate (70) are sequentially laminated.

The organic light-emitting element (20) includes an anode (21), an organic light-emitting layer (22), and a cathode (23), and the color filter layer (50) includes a red sub-pixel region (51), a green sub-pixel region (52), a blue sub-pixel region (53), and a white sub-pixel region (54).

The top-emission organic light-emitting display device emits light from a thin film transistor (10) toward a transparent substrate (60) above. In order to emit light emitted from an organic light-emitting layer (22) upward, the anode (21) may include a reflective layer and the cathode (23) may be composed of a transparent electrode.

An organic light-emitting display device of the bottom emission type emits light toward the lower substrate. In order to emit light emitted from the organic light-emitting layer downward, the anode may be formed of a transparent electrode and the cathode may be formed of an opaque electrode.

An organic light-emitting display device (10) includes an organic light-emitting element (20) that emits white light throughout a red sub-pixel region (51), a green sub-pixel region (52), a blue sub-pixel region (53), and a white sub-pixel region (54), and may include a configuration in which a red color filter is arranged in the red sub-pixel region (51), a green color filter is arranged in the green sub-pixel region (52), and a blue color filter is arranged in the blue sub-pixel region (53).

Accordingly, the organic light-emitting display device including the color filter emits red light through the red color filter in the red sub-pixel (51), green light through the green color filter in the green sub-pixel (52), and blue light through the blue color filter in the blue sub-pixel (53). Here, the white sub-pixel (54) without the color filter emits white light emitted from the organic light-emitting element.

In general, an organic light-emitting display device is provided with a polarizer (70) on a transparent substrate (60) to prevent outdoor visibility problems caused by external light.

The polarizing plate used in the organic light-emitting display device is a circular polarizing film that is a combination of a linear polarizing film and a phase retardation film. Light passing through the linear polarizing film becomes circularly polarized light (135°) after passing through the phase retardation film (45°), and this light is reflected by the TFT or OLED electrode and goes back out in the direction from which it came.

The light reflected on the anode (21) passes through the phase retardation film again, and the 135° circularly polarized light changes into 180° linearly polarized light. Since the last film it encounters is the X-axis linearly polarized (90°) film that the light first passed through, the light cannot pass through and is blocked by the polarizing plate. Based on this principle, an organic light-emitting display device can prevent light from entering from the outside from being reflected and emitted by attaching a polarizing plate to the front.

However, the use of such polarizing plates reduces the transmittance of light generated from the organic light-emitting device by up to 43%, which reduces the brightness of the organic light-emitting display device, and increases manufacturing costs due to the additional process for installing the polarizing plates.

The present invention is intended to solve the above-mentioned problem, and aims to provide an organic light-emitting display device capable of reducing reflectance for external light without providing a polarizing plate to the organic light-emitting display device.

In addition, another object of the present invention is to provide a color filter array substrate capable of emitting green light, red light, and blue light while reducing reflectance for external light by using only a blue color filter or a cyan color filter without using a plurality of color filters.

In order to achieve the above object, the present invention provides the following color filter array substrate.

The color filter array substrate includes a blue color filter layer and a color conversion layer provided on the blue color filter layer, and the color conversion layer includes a green subpixel region that emits green light, a red subpixel region that emits red light, and a blue subpixel region that emits blue light.

Additionally, the green subpixel region of the color conversion layer includes a color conversion material that converts light passing through the blue color filter layer into green light, and the red subpixel region includes a color conversion material that converts light passing through the blue color filter layer into red light.

At this time, the color filter array substrate does not need to be equipped with a polarizing plate because the blue color filter layer can reduce the reflectivity of external light, and color can be implemented by a combination of a blue color filter that transmits light in the blue wavelength range and a color conversion material included in each subpixel without using a plurality of color filters including a red color filter, a green color filter, and a blue color filter, so an exposure process for patterning the blue color filter layer can be omitted.

In addition, the color filter array substrate according to the present invention may include a color conversion layer and a cyan color filter layer provided on the color conversion layer. At this time, the cyan color filter layer is provided on top of the color conversion layer to reduce reflectivity for external light.

Furthermore, an organic light-emitting display device according to the present invention includes a lower substrate including a base substrate, a thin film transistor, an organic light-emitting element, and a passivation layer, and an upper substrate including a resin layer, a color conversion layer, and a color filter layer provided on or below the color conversion layer.

At this time, if a color filter layer is provided under the color conversion layer, the color filter layer is a blue color filter layer, and if blue light is emitted from the organic light-emitting layer, there is an advantage of improved color purity and increased color reproducibility due to the combination of blue light and blue color filter.

In addition, when a color filter layer is provided on top of the color conversion layer, the color filter layer is a cyan color filter layer, and since it is provided on top of the color conversion layer, there is an advantage in that the reflectance for external light can be reduced.

In addition, the present invention can provide an integrated organic light-emitting display device that is not a bonding method of an upper substrate and a lower substrate.

An integrated organic light-emitting display device sequentially laminates a base substrate, a thin film transistor, an organic light-emitting element, a passivation layer, a blue color filter layer, a color conversion layer, and a transparent substrate, and does not include a resin layer for bonding the upper substrate and the lower substrate, thereby improving light transmittance and light efficiency.

The organic light-emitting display device according to the present invention has a blue color filter layer on the upper substrate, so that the reflectance for external light can be reduced, and thus a polarizing plate is not required, and green, red, and blue can be implemented only with the blue color filter layer and the color conversion material included in each subpixel.

In addition, since only a blue color filter layer is provided, the PR process and exposure process for providing a red color filter and a green color filter can be omitted, which has the advantage of simplifying the manufacturing process.

In addition, since the color filter layer and the color conversion layer are provided on the upper substrate and are not exposed to the high temperature process performed during the manufacture of the lower substrate, the color filter layer can be formed by a low temperature process, so that a fluorescent dye can be included in the color filter layer, thereby improving the transmittance and contrast ratio of light generated in the organic light-emitting device and improving the lifespan of the device.

In addition, since the organic light-emitting device emits blue light instead of white light, no additive material is required to implement white light, and the combination of the blue light emitted from the organic light-emitting device and a blue color filter layer can improve color purity and increase color reproducibility.

In addition, by configuring the anode of the organic light-emitting device with a transparent electrode layer and a metal layer, the reduction in reflectance of light emitted from the organic light-emitting device can be minimized.

In addition, the organic light-emitting display device according to the present invention can be manufactured as an integral body without separating the upper substrate and the lower substrate, so that a resin layer for bonding the upper substrate and the lower substrate is not required, the process time can be significantly shortened, and the light transmittance and light efficiency can be improved.

Figure 1 is a cross-sectional view showing an organic light-emitting display device of a top emission type.
FIG. 2 is a cross-sectional view showing a color filter array substrate according to one embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a color filter array substrate according to another embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a color filter array substrate according to another embodiment of the present invention.
FIG. 5 is a cross-sectional view showing an organic light-emitting display device according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view showing an organic light-emitting display device according to another embodiment of the present invention.
FIG. 7 is a cross-sectional view showing an organic light-emitting display device according to another embodiment of the present invention.
Figure 8 shows the spectral change of light emitted from an organic light-emitting display device according to the present invention.
Figure 9 shows the spectral changes of light emitted from an organic light-emitting display device according to the present invention and light passing through a blue color filter layer.

The above-mentioned objects, features and advantages will be described in detail below with reference to the attached drawings, so that those with ordinary skill in the art to which the present invention pertains can easily practice the technical idea of the present invention. In describing the present invention, if it is judged that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, a color filter array substrate and an organic light-emitting display device including the same according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

FIG. 2 is a cross-sectional view showing a color filter array substrate according to one embodiment of the present invention.

Referring to FIG. 2, a color filter array substrate (100) according to one embodiment of the present invention includes a blue color filter layer (110) and a color conversion layer (120) provided on the blue color filter layer (110) and including a green sub-pixel region (121) that emits green light, a red sub-pixel region (122) that emits red light, and a blue sub-pixel region (123) that emits blue light.

The green subpixel region (121) of the color conversion layer (120) includes a color conversion material (121a) that converts light passing through the blue color filter layer (110) into green light, and the red subpixel region (122) includes a color conversion material (122a) that converts light passing through the blue color filter layer (110) into red light.

The color conversion material (121a, 122a) has the characteristics of absorption and luminescence and has the characteristic of absorbing short-wavelength light and then shifting to long-wavelength light. By including the color conversion material (121a, 122a), the light efficiency can be improved and high color reproducibility can be realized.

Specifically, the color conversion material (121a) included in the green sub-pixel area (121) may include a fluorescent dye of the coumarin series, and the color conversion material (122a) included in the red sub-pixel area (122) may include a fluorescent dye of the coumarin series and a fluorescent dye of the perylene series.

Light emitted from the organic light-emitting element passes through the blue color filter layer (110) and is converted into blue light, and the blue light is finally output as green light by the color conversion material (121a) included in the green subpixel area (121), and the blue light is finally output as red light by the color conversion material (122a) included in the red subpixel area (122).

The blue subpixel region (123) from which blue light is emitted does not contain a color conversion material because the light emitted from the organic light-emitting element is ultimately output as blue light by the blue color filter layer (110).

The color filter array substrate (100) according to the present invention has a blue color filter layer (110) provided on the upper substrate of an organic light-emitting display device, so that the blue color filter layer (110) can reduce the reflectance of external light, and therefore a polarizing plate (POL) for reducing the reflectance of external light can be omitted.

In addition, by using a blue color filter layer (110), reflection by external light having a wide wavelength band can be reduced more effectively than color filter layers of other colors, and blue light, green light, and red light can be implemented as internal light emitted from the organic light-emitting element.

In addition, since the color filter array substrate (100) according to the present invention has only a blue color filter layer (110) and does not have a green color filter or a red color filter, the exposure process for manufacturing each color filter can be omitted, resulting in a cost reduction effect.

In addition, the color filter array substrate (100) according to the present invention is not affected by the high-temperature firing process performed on the lower substrate, and thus the blue color filter layer (110) and the color conversion layer (130) can be formed at a low temperature of 180° C. or less, thereby increasing the transmittance of internal light and improving the lifespan of the device due to the low-temperature process.

In addition, a dye having relatively low heat resistance can be included in the blue color filter layer (110), thereby improving the transmittance and contrast ratio of internal light compared to when using a conventional pigment. At this time, fluorescent dyes that can be used include triarylmethane (TAM)-based and xanthene-based dyes, and at least one of these materials is included in the blue color filter layer.

Accordingly, the color filter array substrate according to the present invention can be used in a top-emission type organic light-emitting display device in which light emitted from an organic light-emitting element is emitted upward, rather than a bottom-emission type organic light-emitting display device in which a color filter layer is provided adjacent to a TFT.

The green subpixel region (121), the red subpixel region (122), and the blue subpixel region (123) of the color conversion layer (120) are provided with a black matrix (130) between each subpixel, so that each subpixel region can be distinguished by the black matrix (130).

That is, the black matrix (130) causes the light emitted from the organic light-emitting element to be emitted only in the green subpixel region (121), the red subpixel region (122), and the blue subpixel region (123), respectively. Accordingly, the black matrix (130) can prevent color mixing at the boundary of each subpixel region.

FIG. 3 is a cross-sectional view showing a color filter array substrate (200) according to another embodiment of the present invention.

Referring to FIG. 3, a color filter array substrate (200) according to another embodiment of the present invention includes a color conversion layer (220) including a green sub-pixel region (221) emitting green light, a red sub-pixel region (222) emitting red light, and a blue sub-pixel region (223) emitting blue light, and a cyan color filter layer (210). Here, the cyan color filter layer is sky blue, i.e., cyan.

The green subpixel region (221) of the color conversion layer (220) includes a color conversion material (221a) that converts light emitted from the organic light-emitting element into green light, and the red subpixel region (222) includes a color conversion material (222a) that converts light emitted from the organic light-emitting element into red light.

In a color filter array substrate (200) according to another embodiment of the present invention, a cyan color filter layer (210) is provided on a color conversion layer (220) and is provided adjacent to external light, so that the reflectivity for external light can be further reduced, and since the color filter layer (210) is formed in cyan, green light, red light, and blue light emitted from each subpixel area can be emitted to the outside without a large change in wavelength.

As described above, each subpixel area can be distinguished by a black matrix (230), and color mixing at the boundary of each subpixel area can be prevented by including the black matrix (230).

FIG. 4 is a cross-sectional view showing a color filter array substrate (200) according to another embodiment of the present invention.

At this time, the color conversion layer (220) and the cyan color filter layer (210) are the same as described in FIG. 3, but additionally, a blue color filter material (223a) is included in the blue subpixel area (223) of the color conversion layer (220).

Any material that constitutes a blue color filter layer can be used as the blue color filter material (223a), but as described above, since the color filter layer can be formed at a low temperature, it can include a fluorescent dye such as a triarylmethane (TAM) type and a xanthene type.

FIG. 5 is a cross-sectional view showing an organic light-emitting display device according to an embodiment of the present invention.

Referring to FIG. 5, an organic light-emitting display device (300) according to one embodiment of the present invention includes an upper substrate (300a) and a lower substrate (300b), and the upper substrate (300a) and the lower substrate (300b) can be bonded to form an organic light-emitting display device.

The upper substrate (300a) includes a blue color filter layer (360) and a color conversion layer (370), and the color conversion layer (370) is provided on the blue color filter layer (360) and includes a green sub-pixel region (371) that emits green light, a red sub-pixel region (372) that emits red light, and a blue sub-pixel region (373) that emits blue light.

Additionally, the green subpixel region (371) of the color conversion layer (370) includes a color conversion material that converts light passing through the blue color filter layer (360) into green light, and the red subpixel region (372) includes a color conversion material that converts light passing through the blue color filter layer (360) into red light.

The blue color filter layer (360) and the color conversion layer (370) are provided on the upper substrate (300a) so that the influence of the high-temperature firing process can be minimized and thus the device can be manufactured at low temperatures, thereby improving the light transmittance and extending the device lifespan.

In addition, the blue color filter layer (360) may include a fluorescent dye for improving transmittance and contrast ratio. Fluorescent dyes for this purpose include triarylmethane (TAM)-based and xanthene-based dyes. At least one type of triarylmethane (TAM)-based and xanthene-based dye may be mixed and used.

At this time, a transparent substrate (380) is provided on the upper part of the color conversion layer (370). The transparent substrate (380) can be made of glass or transparent plastic, such as polyimide, and is provided on the uppermost part of the organic light-emitting display device to prevent oxygen or moisture from the external environment from penetrating, and emits light implemented in the color conversion layer (370) upward.

A resin layer (350) that combines the upper substrate (300a) and the lower substrate (300b) is provided at the bottom of the blue color filter layer (360). The upper substrate (300a) is aligned to face the organic light-emitting element (330) of the lower substrate (300b) and arranged to correspond to each sub-pixel area, thereby combining the upper substrate (300a) and the lower substrate (300b).

The lower substrate (300b) includes a base substrate (310), a thin film transistor (320) provided on the base substrate (310), an organic light-emitting element (330) provided on the thin film transistor (320) and including an anode (331), an organic light-emitting layer (332) that emits light, and a cathode (333), and a passivation layer (340) provided on the organic light-emitting element (330).

The base substrate (310) may be in the form of a film including, for example, one selected from the group consisting of a polyester-based polymer, a silicone-based polymer, an acrylic-based polymer, a polyolefin-based polymer, and a copolymer thereof.

A thin film transistor (320) including an active layer, a gate insulating film, a gate electrode, an interlayer insulating film, a source electrode, and a drain electrode is provided on a base substrate (310).

An organic light-emitting element (330) including an anode (331), an organic light-emitting layer (332) that emits light, and a cathode (333) is provided on a thin film transistor (320).

The anode (331) is formed of a transparent conductive material and can be formed of, for example, ITO/Ag/ITO, ITO/Ag/IZO (Indium Zinc Oxide), ATD (ITO/Ag alloy/ITO), and ITO/APC (Ag-Pd-Cu alloy)/ITO.

The anode (331) of the organic light-emitting display device (300) according to the present invention may include a transparent electrode layer formed of a transparent conductive material and a metal layer acting as a reflective layer under the transparent electrode layer. This is to minimize the decrease in the lower reflectivity of light emitted from the organic light-emitting element, and to reflect the light emitted from the organic light-emitting element as much as possible so that the light is emitted upward.

The metal layer may include Mo, MoW, Cr, Ag, APC (Ag-Pd-Cu alloy), Al, and an Al alloy capable of reflecting light, and may be formed by including at least one of these.

An organic light-emitting layer (332) is formed on the anode (331), and the organic light-emitting layer (332) may be composed of multiple layers of a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transporting layer, and an electron injection layer to increase light-emitting efficiency.

A cathode (333) is formed on the organic light-emitting layer (332). The cathode (333) can be formed of a transparent conductive material, and the transparent conductive material can be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc oxide, or tin oxide.

The organic light-emitting element (330) of the organic light-emitting display device (300) according to the present invention can emit white light or blue light.

However, in order to emit white light, more materials must be added to the organic light-emitting layer than to emit blue light. In addition, since the present invention includes a blue color filter layer, the combination of the blue light emitted from the organic light-emitting element and the blue color filter layer has the effect of improving color purity and increasing color reproducibility, so it is more effective for the organic light-emitting element of the organic light-emitting display device of the present invention to emit blue light.

A passivation layer (340) that acts as a protective layer is provided on the organic light-emitting element (330), and may be formed as a single layer composed of one of materials such as a silicon oxide film or a silicon nitride film, or as multiple layers thereof.

As described above, when the color filter layer (360) is provided on the lower substrate (300b), a minimum of six firing processes are performed on the lower substrate (300b), which causes color fading in the blue color filter layer (360), and since fluorescent dye cannot be used, there is a problem that light transmittance is reduced. However, in the present invention, the color filter layer (360) is provided on the upper substrate (300a), so the above-described problem does not occur, and since fluorescent dye can be used instead of pigment in the color filter layer (360), transmittance and contrast ratio can be improved.

In addition, since the blue color filter layer and color conversion layer are manufactured on an upper substrate that is not affected by the high-temperature firing process, the blue color filter layer and color conversion layer can be manufactured even at low temperatures, so that the transmittance of the emitted light can be improved and the lifespan of the device can be extended.

The organic light-emitting display device according to the above Fig. 5 is a top-emission display device in which light emitted from the organic light-emitting element is emitted upward, and the effect of the present invention described above cannot be achieved in an organic light-emitting display device provided adjacent to a thin film transistor.

FIG. 6 is a cross-sectional view showing an organic light-emitting display device according to another embodiment of the present invention.

Referring to FIG. 6, an organic light-emitting display device (400) according to another embodiment of the present invention includes a color conversion layer (470) and a cyan color filter layer (460) provided on an upper substrate (400a), and the cyan color filter layer (460) is provided on top of the color conversion layer (470).

The color conversion layer (470) includes a green subpixel region (471) that emits green light, a red subpixel region (472) that emits red light, and a blue subpixel region (473) that emits blue light.

Additionally, the green subpixel region (471) of the color conversion layer (470) includes a color conversion material that converts light emitted from the organic light-emitting element (430) into green light, and the red subpixel region (472) includes a color conversion material that converts light emitted from the organic light-emitting element (430) into red light.

An organic light-emitting display device (400) according to another embodiment of the present invention has a cyan color filter layer (450) provided on top of a color conversion layer (470) and is provided adjacent to the upper surface of the organic light-emitting display device, so that the reflectance for external light can be further reduced.

FIG. 7 is a cross-sectional view showing an organic light-emitting display device according to another embodiment of the present invention.

Referring to FIG. 7, an organic light-emitting display device (500) according to another embodiment of the present invention illustrates an organic light-emitting display device that is integrally laminated without distinction between an upper substrate and a lower substrate.

As described in FIG. 5, a base substrate (510), a thin film transistor (520), an organic light-emitting element (530), and a passivation layer (540) are sequentially laminated, and then a blue color filter layer (550) is provided on the passivation layer (540), a color conversion layer (560) is provided on the blue color filter layer (550), and a transparent substrate (570) is provided on the color conversion layer (560).

The color conversion layer (560) includes a green subpixel region that emits green light, a red subpixel region that emits red light, and a blue subpixel region that emits blue light.

Additionally, the green subpixel area of the color conversion layer (560) includes a color conversion material that converts light passing through the blue color filter layer (550) into green light, and the red subpixel area includes a color conversion material that converts light passing through the blue color filter layer into red light.

The organic light-emitting display device (500) according to the present invention can be manufactured as an integral body without separating the upper substrate and the lower substrate, so that a resin layer for bonding the upper substrate and the lower substrate is not required, the process time can be significantly shortened, and the light transmittance and light efficiency can be improved.

Figure 8 shows the spectral change of light emitted from an organic light-emitting display device according to the present invention.

Referring to FIG. 8, it can be seen that the organic light-emitting display device implements blue light, green light, and red light by allowing light generated from the organic light-emitting element to pass through a blue color filter layer and a color conversion layer.

It can be seen that when white light is emitted from an organic light-emitting element of an organic light-emitting display device, the brightness is higher than when blue light is emitted. However, in the present invention, when blue light is emitted from an organic light-emitting element, the combination of blue light and a blue color filter layer narrows the width of the peak where blue light appears, thereby increasing color purity and color reproducibility.

FIG. 9 shows the spectral changes of light emitted from an organic light-emitting display device according to the present invention and light passing through a blue color filter layer, demonstrating the effect produced by the combination of the aforementioned blue light and blue color filter layer.

As shown in Fig. 9, when blue light is emitted from an organic light-emitting device, the peak width at the blue wavelength is the widest, and the combination of the blue light OLED and the blue color filter layer generates the sharpest peak with a narrow half-width, so it is expected that the color purity will be improved and the color reproducibility will increase.

Although the above description focuses on the embodiments of the present invention, various changes or modifications can be made at the level of a person skilled in the art. Accordingly, it will be understood that such changes and modifications are included within the scope of the present invention as long as they do not depart from the scope of the present invention.

10: Thin film transistor 20: Organic light emitting diode
21: Anode 22: Organic light-emitting layer
23: Cathode 30: Passivation layer
40: Resin layer 50: Color filter layer
51: Red subpixel 52: Green subpixel
53: Blue subpixel 54: White subpixel
60: transparent substrate 70: polarizing plate
100, 200: Color filter array substrate
110: Blue color filter layer 120, 220: Color conversion layer
121, 221: Green subpixel area 121a, 221a: Color conversion material
122, 222: Red subpixel area 122a, 222a: Color conversion material
123, 223: Blue subpixel area 130, 230: Black matrix
210: Cyan color filter layer 223a: Blue color filter material
300, 400, 500: Organic light-emitting display
310, 410, 510: Base board
320, 420, 520: Thin Film Transistor
330, 430, 530: Organic light-emitting diode
331, 431, 531: Anode
332, 432, 532: Organic light-emitting layer
333, 433, 533: cathode
340, 440, 540: Passivation layer
350, 450: Resin layer
360: Blue color filter layer
370, 470: Color conversion layer
460: Cyan color filter layer
380, 480: Transparent substrate
550: Blue color filter layer
560: Color conversion layer
570: Transparent substrate

Claims (13)

A blue color filter layer that transmits light in the blue wavelength range; and
A color conversion layer provided on the blue color filter layer and including a green subpixel region emitting green light, a red subpixel region emitting red light, and a blue subpixel region emitting blue light;
The green subpixel region of the color conversion layer includes a color conversion material that converts light passing through the blue color filter layer into green light, and the red subpixel region includes a color conversion material that converts light passing through the blue color filter layer into red light.
The above blue color filter layer contains at least one dye selected from the group consisting of triarylmethane (TAM) and xanthene.
A color filter array substrate including a color conversion material that converts light passing through the blue color filter layer into red light and a fluorescent dye of the coumarin series and a fluorescent dye of the perylene series.
delete delete In the first paragraph,
A color filter array substrate containing a fluorescent dye of the coumarin series, which converts light passing through the blue color filter layer into green light.
delete delete delete Base board,
A thin film transistor provided on the above base substrate,
An organic light-emitting device provided on the above thin film transistor and including an anode, an organic light-emitting layer that emits light, and a cathode; and
A lower substrate including a passivation layer provided on the organic light-emitting device; and
A resin layer provided on the lower substrate,
A color conversion layer provided on the resin layer and including a green subpixel region emitting green light, a red subpixel region emitting red light, and a blue subpixel region emitting blue light,
A blue color filter layer provided below the above color conversion layer, and
Including a transparent substrate provided on the color conversion layer,
The green subpixel region of the color conversion layer includes a color conversion material that converts light passing through the blue color filter layer into green light, and the red subpixel region includes an upper substrate that includes a color conversion material that converts light passing through the blue color filter layer into red light;
The above blue color filter layer contains at least one dye selected from the group consisting of triarylmethane (TAM) and xanthene.
An organic light-emitting display device in which a color conversion material that converts light passing through the blue color filter layer into red light includes a fluorescent dye of the coumarin series and a fluorescent dye of the perylene series.
delete delete In Article 8,
The above organic light-emitting element is an organic light-emitting display device that emits blue light.
In Article 8,
The above anode is an organic light-emitting display device including a transparent electrode layer and a metal layer.
base board;
A thin film transistor provided on the above base substrate;
An organic light-emitting device provided on the thin film transistor and including an anode, an organic light-emitting layer that emits light, and a cathode;
A passivation layer provided on the above organic light-emitting device;
A blue color filter layer provided on the above passivation layer;
A color conversion layer provided on the blue color filter layer and including a green subpixel region emitting green light, a red subpixel region emitting red light, and a blue subpixel region emitting blue light; and
A transparent substrate provided on the color conversion layer;
The green subpixel region of the color conversion layer includes a color conversion material that converts light passing through the blue color filter layer into green light, and the red subpixel region includes a color conversion material that converts light passing through the blue color filter layer into red light.
The above blue color filter layer contains at least one dye selected from the group consisting of triarylmethane (TAM) and xanthene.
An organic light-emitting display device in which a color conversion material that converts light passing through the blue color filter layer into red light includes a fluorescent dye of the coumarin series and a fluorescent dye of the perylene series.

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