Display device, display device manufacturing method, and method for implementing colors in display device

Abstract

The present invention relates to: a display device capable of exhibiting high color purity and high efficiency by completely removing blue light that leaks from a quantum dot (QD) color conversion layer in the display device; a manufacturing method therefor; and a method for implementing colors by using the display device. The display device according to one embodiment comprises: a first layer that can emit blue light; a second layer that can perform color conversion on the first layer; and a third layer for selectively reflecting and rotating the blue light.

Description

Display device and method for manufacturing the display device and method for implementing color in the display device

[0001] The present invention relates to a color conversion display based on blue light.

[0002] A color conversion display is a display that converts the emitted light from a blue light source into light with a shorter wavelength than green or red by controlling the band gap of the semiconductor.

[0003] Color Conversion technology can be broadly classified into BlueOLED + Color Conversion Layer (CCL) and Blue microLED + CCL depending on the method of the blue light source.

[0004] The CCL method is generally based on quantum dot (QD) technology. Recently, a method using perovskite nanocrystals has also been used.

[0005] Meanwhile, as a next-generation display, technologies for applying micro LED to displays are being developed, but there is a problem in that each LED must be transferred separately to R, G, and B and aligned by location.

[0006] To address this, recent attempts have been made to pattern a stable blue LED light source with a color conversion layer, such as a QD, to induce patterned green and red colors. This method is called LED-Color Conversion technology, and this method is also actively being developed in display technology using MicroLEDs.

[0007] These quantum dot technologies have the following problems:

[0008] First, QD and Perovskite Color Conversion technologies are not perfect, and color conversion is imperfect.

[0009] Second, due to the imperfection of color conversion, blue incident light leaks out, resulting in color mixing such as converted green+blue, red+blue, etc.

[0010] Third, to compensate for incomplete color conversion, formation of a thick color conversion layer and a bank process for this are required.

[0011] Fourth, a high thickness of the Color Conversion layer is detrimental to increasing resolution.

[0012] Fifth, blue light leakage is unavoidable in any case, and therefore requires an additional absorption color filter layer.

[0013] Sixth, no matter what method you use, the blue light leaks out.

[0014] Regarding such conventional quantum dot display devices, Korean Patent No. 1854505 is disclosed.

[0015] The purpose of the present invention is to provide a display device and a method for manufacturing the display device, and a method for implementing color in the display device, which can solve the problems of the conventional quantum dot display described above.

[0016] As a means of solving the above problem, a display device including a layer that reflects only the blue wavelength light leaking from the green and red color conversion layers can be provided.

[0017] On the other hand, the third layer may use a multilayer dielectric layer structure that reflects only blue light, or may include a Chiral Liquid Crystal (CLC) layer that reflects only blue light.

[0018] At this time, the third layer can be formed as a layer that reflects back the blue leakage light by designing the refractive index of the dielectric and the structure of the dielectric repeater to operate slightly larger than the width and position of the blue wavelength light source or the width and position of the light source.

[0019] At this time, the third layer is configured by adjusting the appropriate birefringence difference (Δn) and the repetition rotation pitch length (p) using the de Vries condition Δλ = Δn·p, thereby controlling the position and width (Δλ) of the corresponding wavelength of the blue light to be reflected.

[0020] Additionally, the blue light reflected back from the third layer can be recycled by repeatedly incidenting it onto the color conversion layers of the green and red layers using a mirror reflector, thereby repeating the color conversion process.

[0021] In addition, by allowing the blue light leaked by the third layer to be reflected and recycled multiple times, a display device can be provided in which the efficiency of color conversion is increased beyond the effect of a thick color conversion layer.

[0022] Meanwhile, a display device configured so that a high-efficiency color conversion effect can be maintained even when the second layer allows an incomplete color conversion layer to function can be provided.

[0023] Additionally, a display manufacturing method can be provided in which a photo resist matrix, such as a color filter capable of UV patterning, is formed within a shape material and a second layer including a color conversion function is created through a photolithography process.

[0024] Meanwhile, the third layer can be composed of a circular polarizer to maximize the recycling of blue light.

[0025] Meanwhile, the third can be composed of a double layer of left-rotation and right-rotation in the same Blue reflection wavelength band.

[0026] As a means of solving the above problem, a display device including a layer that reflects only the blue wavelength light leaking from the green and red color conversion layers can be provided.

[0027] On the other hand, the third layer may use a multilayer dielectric layer structure that reflects only blue light, or may include a Chiral Liquid Crystal (CLC) layer that reflects only blue light.

[0028] At this time, the third layer can be formed as a layer that reflects back the blue leakage light by designing the refractive index of the dielectric and the structure of the dielectric repeater to operate slightly larger than the width and position of the blue wavelength light source or the width and position of the light source.

[0029] At this time, the third layer is configured by adjusting the appropriate birefringence difference (Δn) and the repetition rotation pitch length (p) using the de Vries condition Δλ = Δn·p, thereby controlling the position and width (Δλ) of the corresponding wavelength of the blue light to be reflected.

[0030] Additionally, the blue light reflected back from the third layer can be recycled by repeatedly incidenting it onto the color conversion layers of the green and red layers using a mirror reflector, thereby repeating the color conversion process.

[0031] In addition, by allowing the blue light leaked by the third layer to be reflected and recycled multiple times, a display device can be provided in which the efficiency of color conversion is increased beyond the effect of a thick color conversion layer.

[0032] Meanwhile, a display device configured so that a high-efficiency color conversion effect can be maintained even when the second layer allows an incomplete color conversion layer to function can be provided.

[0033] Additionally, a display manufacturing method can be provided in which a photo resist matrix, such as a color filter capable of UV patterning, is formed within a shape material and a second layer including a color conversion function is created through a photolithography process.

[0034] Meanwhile, the third layer can be composed of a circular polarizer to maximize the recycling of blue light.

[0035] Meanwhile, the third can be composed of a double layer of left-rotation and right-rotation in the same Blue reflection wavelength band.

[0036] Figure 1 is a conceptual diagram showing the operation of a conventional quantum dot display.

[0037] FIG. 2 is a cross-sectional view of a display device according to a first embodiment of the present disclosure.

[0038] Figure 3 is a cross-sectional view showing a modified example of the first embodiment.

[0039] Fig. 4 is a cross-sectional view showing the concept of a reflective layer in the first embodiment.

[0040] Figure 5 is a conceptual diagram showing the molecular structure included in the reflective layer in the first embodiment.

[0041] Figure 6 is a conceptual diagram illustrating a modified example of the molecular structure included in the reflective layer in Figure 5.

[0042] Figure 7 is a drawing showing a wavelength range reflected by a reflective layer in the first embodiment.

[0043] Figure 8 is a diagram showing the operating status of the reflective layer of the first embodiment.

[0044] Figure 9 is an operating state diagram of the first embodiment.

[0045] FIG. 10 is a cross-sectional view of a display device according to a second embodiment of the present disclosure.

[0046] Figure 11 is a diagram showing the operating status of the reflective layer in the second embodiment.

[0047] Figure 12 is a modified example of the second embodiment.

[0048] Figure 13 is a flowchart of a display manufacturing method according to a third embodiment of the present disclosure.

[0049] Figure 14 is a conceptual diagram of the step of creating the second layer in the third embodiment.

[0050] Figure 15 is a conceptual diagram of a step of creating a third layer in the third embodiment.

[0051] Figure 16 is a conceptual diagram illustrating a modified example of the step of creating the third layer in the third embodiment.

[0052] Figure 17 is a drawing showing an example of a molecular structure included in the third layer in the third embodiment.

[0053] FIG. 18 is a flowchart of a method for implementing color in a display device according to a fourth embodiment of the present disclosure.

[0054] Hereinafter, a display device, a method for manufacturing the display device, and a method for implementing color in the display device according to embodiments of the present invention will be described in detail with reference to the attached drawings. In addition, the names of each component in the description of the embodiments below may be referred to by different names in the art. However, if there is functional similarity and identity between them, even if a modified embodiment is adopted, it can be viewed as an equivalent configuration. In addition, the symbols added to each component are described for the convenience of explanation. However, the content depicted in the drawings in which these symbols are described does not limit each component to the scope within the drawings. Similarly, even if an embodiment with some modifications to the configuration in the drawings is adopted, it can be viewed as an equivalent configuration if there is functional similarity and identity. In addition, if it is recognized as a component that should be included naturally in light of the general level of a technician in the relevant technical field, a description thereof will be omitted.

[0055] Figure 1 is a conceptual diagram showing the operation of a conventional quantum dot display.

[0056] Referring to Fig. 1, conventional devices cause a blue light leakage problem due to the imperfection of color conversion. This means a decrease in color reproducibility. The problem of severely lowering the color purity and color reproducibility of red or green pixels ultimately lies in the fact that the color purity of the red or green color pixels is severely lowered, thereby deteriorating the color purity and color reproducibility characteristics. There are two main alternatives currently being developed in the industry: first, forming a thick QD color conversion layer, and second, applying a secondary absorption-type color filter to block and absorb blue light to compensate for the insufficient color conversion. However, this method causes additional problems related to the process.

[0057] Specifically, color-conversion materials like QDs and perovskite are formed through methods like ink-jetting. During this process, the solvent dries, resulting in a thinner film than the applied solution. This thin film prevents complete color conversion and causes blue light leakage. Therefore, a higher-thickness process that takes solution processing into account is required.

[0058] Additionally, inkjet uses a DAM structure called a bank to form boundaries between colors. This structure requires a thicker DAM to trap a large amount of liquid. Typically, this process makes it difficult to form a bank with such a high thickness in a single step, requiring multiple coating and patterning inkjet processes.

[0059] Even with this method, the color conversion efficiency is not perfect, and blue light still leaks. This leakage is blocked by additional color filters that transmit only green or red wavelengths and absorb blue wavelengths. However, this method not only complicates the process and panel structure, but also causes additional transmission loss due to the color filter, reducing the luminance of the light.

[0060] FIG. 2 is a cross-sectional view of a display device according to a first embodiment of the present disclosure.

[0061] Referring to FIG. 2, a display device (1) according to a first embodiment of the present disclosure may be configured to include a substrate (10), a mirror layer (20), a first layer (30), a second layer (51, 52), a third layer (60), and a bank dam (40).

[0062] The substrate (10) is configured with a predetermined area. The substrate (10) can be configured in various sizes depending on the purpose.

[0063] The first layer (30) is configured to emit blue light. The first layer (30) can function as a backlight. The first layer can be configured to include a light emitting diode (LED). For example, the first layer (30) can be configured to emit blue light, such as a blue organic light emitting diode (blue OLED), a blue light emitting diode (blue LED), or a blue laser.

[0064] The mirror layer (20) is configured so that blue light reflected from the reflection layer (50) can be reflected again and returned to the color conversion layer, as described later.

[0065] The second layer (51, 52) is provided for color conversion. The second layer is configured to convert blue light into red light (51) or blue light into green light (52). The second layer (51, 52) is configured to form a subpixel. The second layer (51, 52) is a semiconductor material that induces color conversion, and can be a material that forms all color semiconductor band gaps, such as quantum dots, perovskites, Qaumtom nanowires, and organic light-emitting semiconductors.

[0066] The third layer (60) is provided on the outer side of the second layer (51, 52) and is configured to reflect blue light leaked from the second layer (51, 52). The third layer (60) is configured to transmit green light and red light and to reflect only the leaked blue light.

[0067] A bank dam (40) is provided to distinguish subpixels and can be formed to a predetermined height.

[0068] In this embodiment, the third layer (60) may be provided in contact with the upper portion of the bank dam (40) and the outer surface of the second layer (51, 52).

[0069] Figure 3 is a cross-sectional view showing a modified example of the first embodiment.

[0070] Referring to FIG. 3, in the first embodiment, the bank dam (40) may be formed higher than in the previously described embodiment. In this case, a second layer (51, 52) and a third layer (60) may be provided between the bank dam (40). In this case, the third layer may be provided in a divided manner within a subpixel.

[0071] Additionally, the display device (1) according to the present disclosure may be configured to include widely known components such as an LCD panel and a color filter used in a conventional quantum dot display device (1).

[0072] Fig. 4 is a cross-sectional view showing the concept of a reflective layer in the first embodiment.

[0073] Referring to FIG. 4, in the first embodiment of the present disclosure, the third layer (60) may include a third-first layer and a third-second layer that are alternately laminated. The refractive index (n1) of the third-first layer and the refractive index (n2) of the third-second layer may be different from each other.

[0074] A multilayer dielectric thin film can be formed by repeatedly forming the 3-1 layer and the 3-2 layer at a unit pitch with a regular distance d. At this time, by selecting a material having n1 and a material having n2 and appropriately controlling d, a multilayer dielectric reflector thin film that selectively reflects only blue wavelength light can be formed. As an example, the 3rd layer (60) can be composed of a material containing a mono or diacrylate molecular structure. Meanwhile, the 3rd layer (60) can be composed by using a thickness of 1 μm or less at the distance d, and the 3-1 layer and the 3-2 layer can be alternately laminated two or more times.

[0075] Figure 5 is a conceptual diagram showing the molecular structure included in the reflective layer in the first embodiment.

[0076] Referring to Fig. 5, the third layer can obtain a multilayer dielectric effect through a twisted structure of liquid crystal molecules. The third layer can include a Chiral Liquid Crystal (CLC) layer. Mesogenic molecules such as liquid crystals have a birefringence characteristic with two refractive index values ​​of n1 and n2 in one molecular structure. Accordingly, if a rotational twist structure (chiral structure) is induced in such a birefringent molecule, a multilayer dielectric effect can be obtained in which, from the viewpoint of light, the refractive dielectrics of n1 and n2 are repeated every ½ of the rotation period (pitch: p), as shown in the figure.

[0077] Figure 6 is a conceptual diagram illustrating a modified example of the molecular structure included in the reflective layer in Figure 5.

[0078] Referring to Fig. 6, the third layer can selectively reflect blue light by means of rotational twist molecules. In addition, when the molecular structure included in the third layer is a rotational twist structure, by controlling n1, n2, and the length of the rotational twist (p), the position and width (Δλ) of the corresponding wavelength of blue light can be selectively reflected by using the de Vries condition, Δλ = Δn*?*p.

[0079] Figure 7 is a drawing showing a wavelength range reflected by a reflective layer in the first embodiment.

[0080] Referring to FIG. 7, the intensity of blue light and the reflection area in the third layer are disclosed when the third layer includes a molecule having a chiral structure according to the present disclosure. As illustrated, light with a wavelength of 200 nm to 500 nm is reflected and returned by the third layer. However, red and green light, whose wavelengths have been changed in the color conversion layer, pass through the third layer.

[0081] Figure 8 is a diagram showing the operating status of the reflective layer of the first embodiment.

[0082] Referring to Fig. 8, in order to configure a full display of Red / Green / Blue, the blue pixel is configured so that blue light is not reflected and is completely transmitted. However, only in the red and green pixel portions that induce light emission of other colors through color conversion, blue light is selectively reflected in the third layer. Therefore, the reflected blue light can be recycled. At this time, the blue recycling layer can be configured by patterning so that blue light recycling occurs. At this time, the patterning method can use wet etching or dry etching using an additional photoresist. In addition, the patterning can be performed by direct patterning through lithography using an inkjet direct pattern printing or a configuration capable of UV curing.

[0083] Figure 9 is an operating state diagram of the first embodiment.

[0084] Referring to Fig. 9, blue light is generated in the first layer as shown in the figure. The second layer is equipped with red and green subpixels. Therefore, the wavelength of blue light changes to red and green for each subpixel as it passes through the second layer. Meanwhile, as described above, blue light can pass through the second layer, and at this time, the blue light is reflected by the third layer equipped on the outside of the second layer and returns to the second layer and the first layer. In addition, if a mirror reflective layer is equipped on the substrate, the blue light can be reflected again and recycled.

[0085] Specifically, the blue light can be blocked and reflected and recycled at the location where color conversion is formed (Red and Green) by blue light. At this time, the blue light that is reflected and returned is reflected again by the mirror layer that forms the mirror surface and re-incident to the second layer, which is the first color conversion layer. Through this, the leaked blue light is re-incident to the color conversion layer, and through this, the effect of the color conversion layer is additionally obtained.

[0086] This effect causes additional red or green light emission by the color conversion layer, thereby amplifying the efficiency of light emission.

[0087] In addition, the remaining blue light after re-incident is returned again through blue reflection recycling and repeats re-incident. With this repeated incidence of blue light, the color conversion efficiency increases and the final blue light leakage is blocked.

[0088] FIG. 10 is a cross-sectional view of a display device according to a second embodiment of the present disclosure.

[0089] Referring to FIG. 10, a display device according to a second embodiment of the present disclosure may include a third layer (70) including a first chiral liquid crystal layer (CLC: Chiral Liquid Crystal, 71) and a second chiral liquid crystal layer (72) having different rotation directions.

[0090] The first chiral liquid crystal layer (71) and the second chiral liquid crystal layer (72) cause selective reflection of blue light and can be laminated in a double chiral structure with twist directions of Right Handed and Left Handed. This configuration can also be formed in reverse as a Left Hand Top Right Hand Bottom structure or a Right Hand Top Left Hand Bottom structure.

[0091] Meanwhile, although the display device is described above as including a mirror layer, this is only an example and can be modified and applied to a configuration that omits the mirror layer and prevents leakage of blue light.

[0092] Figure 11 is a diagram showing the operating status of the reflective layer in the second embodiment.

[0093] Referring to Fig. 11, in the second embodiment, the reflection layer reflects and blocks only the blue light (50%) in the same direction as the rotation of the CLC in the second chiral liquid crystal layer (72) and recycles it. In addition, the blue light in the opposite direction of the rotation of the remaining blue light (50%) is also reflected and rotated in the first chiral liquid crystal layer (71). The blue light leaking due to incomplete color conversion to red or green in the second layer can be perfectly reflected and recycled. Consequently, by perfectly blocking the leakage of blue light according to the second embodiment, the purity of the color converted to red or green can be maximized and increased. In addition, the efficiency of the emitted light can be amplified and the high level of luminous characteristics can be improved through repeated color conversion by perfect recycling without missing the leakage light due to recycling.

[0094] Figure 12 is a modified example of the second embodiment.

[0095] Referring to FIG. 12, the third layer may include a chiral liquid crystal layer (82) having rotation in one direction and an opposite hand circular polarizer (81) for the chiral liquid crystal layer (82). When the second embodiment is modified in this way, the first 50% selective recycling and blocking by the chiral liquid crystal layer (82) can be achieved, and the remaining light with rotation in the direction can be blocked by the CLC Pol. However, additional recycling reflection by the opposite hand circular polarizer (81) does not occur, so the repetition effect of the color conversion may be ineffective. However, the effect of blocking blue light is achieved in the same way, and perfect color expression can be achieved.

[0096] Hereinafter, a display manufacturing method according to a third embodiment of the present disclosure will be described with reference to FIGS. 13 to 17.

[0097] Figure 13 is a flowchart of a display manufacturing method according to a third embodiment of the present disclosure.

[0098] Referring to FIG. 13, a display manufacturing method according to the third embodiment of the present disclosure is described.

[0099] It may include a step (S110) of creating a first layer capable of emitting blue light, a step (S120) of creating a second layer configured to be color-convertible on the outside of the first layer, and a step (S130) of creating a third layer configured to be capable of reflecting blue light on the outside of the second layer.

[0100] The step (S110) of generating a first layer capable of emitting blue light is a step of generating a layer capable of emitting blue light, such as a blue-OLED, a blue-LED, or a blue laser. This step can be performed in the same manner as the step of manufacturing a conventional blue-light emitting configuration.

[0101] The step (S120) of creating a second layer configured to be color-changeable on the outside of the first layer corresponds to the step of creating a quantum dot, perovskite, quantum nanowire, or organic light-emitting semiconductor.

[0102] The step (S130) of creating a third layer configured to reflect blue light on the outside of the second layer corresponds to a step of creating a third layer capable of reflecting and blocking blue light leaking through the second layer.

[0103] Figure 14 is a conceptual diagram of the step of creating the second layer in the third embodiment.

[0104] Referring to FIG. 14, in the step (S120) of generating the second layer in the third embodiment, first, a mixture containing a general transparent negative photoresist binder capable of UV patterning is formed. After the generated mixture is coated on the upper layer of the first layer, the color conversion layer is cured with a photo MASK pattern by selectively irradiating UV light at a desired location on the red or green pixel, thereby forming a pattern. At this time, incomplete color conversion in the second layer induces multiple incidences of the color conversion layer by recycling through selective reflection of blue light in the third layer, thereby securing color conversion efficiency. Therefore, by forming the second layer (QD color conversion layer) at a thickness that allows for a thin photoresist configuration (normally less than 6 μm), a photo-patterned color conversion in the form of a stable photo lithography can be completed.

[0105] Figure 15 is a conceptual diagram of a step of creating a third layer in the third embodiment.

[0106] Referring to FIG. 15, the step (S130) of generating the third layer can be performed by generating a chiral liquid crystal layer using a material containing a mono or diacrylate molecular structure. At this time, the chiral liquid crystal layer can be generated as a double layer. For example, in terms of the process for generating the third layer, a dielectric thin film can be selectively generated using an E-Beam deposition process, a coating process, a CVD method, etc.

[0107] This step can be configured such that the third layer is a bilayer, and the rotational direction of the chiral molecules is left handed in the upper layer and right handed in the lower layer, or right handed in the upper layer and left handed in the lower layer.

[0108] Meanwhile, the step of generating the third layer (S130) can be modified and implemented as a step in which the lower layer is composed of a chiral liquid crystal layer and the upper layer is composed of an opposite circular polarizer.

[0109] Meanwhile, the third layer can be formed with a chiral liquid crystal (chiral LC). For example, it can be formed by adjusting and coating the material constituting the selective reflection layer into a molecular structure capable of forming a UV-curable chain, and exposing only the portions (red pixels and green pixels) where blue selective reflection is desired. When the third layer is exposed through an exposure mask, a chiral liquid crystal layer (CLC) for blue selective reflection is formed only in the selective portions. Afterwards, the areas where UV curing is not formed due to blocking of the mask pattern are washed away through the Develop process, so that a CLC layer with a blue light blocking function is not formed in the position of the blue pixel, allowing blue light to be fully transmitted.

[0110] Figure 16 is a conceptual diagram illustrating a modified example of the step of creating the third layer in the third embodiment.

[0111] The step of creating the third layer (S130) can be created by forming an inkjet on the second layer, the green and red pixels, using the inkjet method to create a CLC layer material that reflects the blue pixels.

[0112] Figure 17 is a drawing showing an example of a molecular structure included in the third layer in the third embodiment.

[0113] Referring to FIG. 17, the step (S130) of generating the third layer may generate a material constituting the selective reflection layer of the chiral liquid crystal layer (chiral LC) with a molecular structure capable of forming a UV-curable chain. As an example of the material constituting the third layer, it may include a monoacrylate or diacrylate molecular material having one or two acrylate reactive groups capable of being cured by UV. At this time, the molecular material has a bonding structure "R" composed of all various birefringences, and the molecule of R may include any one of all other reactive bonding structures, including a phenyl group, a heagonal group, a methyl group, an ester group, an ether group, etc.

[0114] Hereinafter, a method for implementing color in a display device according to the fourth embodiment of the present disclosure will be described.

[0115] FIG. 18 is a flowchart of a method for implementing color in a display device according to a fourth embodiment of the present disclosure.

[0116] Referring to FIG. 18, a method for implementing color in a display device according to a fourth embodiment of the present disclosure may include a step of emitting blue light in a first layer (S210), a step of converting color while allowing some of the blue light to pass through a second layer (S220), and a step of preventing transmission of blue light in a third layer by reflecting at least some of the blue light in the third layer (S230).

[0117] The step of emitting blue light in the first layer (S210) corresponds to the step of emitting blue light with a wavelength of 200 to 500 nm.

[0118] The step (S220) where some blue light passes through the second layer and undergoes color conversion corresponds to the step where some light unintentionally leaks when color converting blue light into green or red light within the subpixel. This is a phenomenon that occurs because the color conversion is not complete.

[0119] The step (S230) in which at least some of the blue light is reflected from the third layer and thus blue light transmission is prevented from the third layer corresponds to the step in which light leaking from the second layer is reflected from the third layer and at least some of it is recycled and re-colored. In this case, the third layer may be the third layer included in the first or second embodiments described above.

[0120] The method according to the fourth embodiment of the present disclosure can be applied to all product groups constituting a display, and specifically, can be applied to all display products such as main display products such as TV displays, monitors, NTPCs, tablets, and smartphones, as well as AR, wearable displays, ultra-large advertising displays, automotive displays, and transparent displays.

Claims

1. A first layer configured to emit blue light; A second layer configured to enable color conversion in the first layer; A display device comprising a third layer that selectively reflects and rotates the blue light.

2. In paragraph 1, A display device wherein the second layer includes one of a quantum dot, a perovskite, a quantum nanowire, and an organic light-emitting semiconductor.

3. In paragraph 2, The first layer is a display device made of any one of a blue-OLED, a blue-LED, and a blue laser.

4. In paragraph 3, A display device wherein the first layer is configured to generate light having a wavelength of 200 nm to 500 nm.

5. In paragraph 1, A display device comprising the third layer including a refracted dielectric repeating structure.

6. In paragraph 5, The above-mentioned dielectric repeating structure is a display device having a structure in which different dielectrics of n1 and n2 are alternately stacked.

7. In paragraph 6, A display device in which the above-mentioned dielectric repeating structure is manufactured using any one of deposition, coating, and electron beam deposition.

8. In paragraph 6, A display device in which the above dielectric repeating structure is a chiral liquid crystal layer including twisted structures in which n1 and n2 refractions of a birefringent medium are repeatedly arranged.

9. In paragraph 8, A display device wherein the twist direction of the twist structures within the chiral liquid crystal layer is left and / or right.

10. In paragraph 8, A display device wherein the chiral liquid crystal layer is configured to reflect at least a portion of light having a wavelength of 200 nm to 500 nm.

11. In paragraph 8, The light emitted from the first layer returns to the first layer by the chiral liquid crystal layer, A display device in which the above-mentioned returned light is re-reflected by a mirror electrode, and the re-reflected blue light is incident on a color conversion layer of green light or red light, thereby repeating the color conversion effect.

12. A step of forming a first layer configured to emit blue light; A step of creating a second layer, which is a color conversion layer, on the outer side of the first layer; and A method for manufacturing a display device, comprising the step of creating a third layer that reflects the blue light on the outer side of the second layer.

13. In paragraph 12, The step of creating the second layer is performed using a material including a color conversion material and a transparent negative photoresist having photocuring properties, and is performed through selective exposure using a photo mask. A method for manufacturing a display device, wherein the step of creating the third layer is performed using a UV-curable material and a photolithography process through selective UV curing.

14. In paragraph 13, The step of creating the third layer is: A method for manufacturing a display device that uses a material containing a mono or diacrylate molecular structure and creates a chiral liquid crystal layer.

15. In paragraph 14, The step of creating the third layer is: A method for manufacturing a display device comprising a double layer of upper and lower layers so as to recycle the above blue light.

16. In paragraph 15, The step of creating the third layer is: Each of the above bilayers comprises chiral molecules, The rotational direction of the above chiral molecule is Left handed in the upper layer, right handed in the lower layer or A method for manufacturing a display device configured in a right-handed direction in the upper layer and a left-handed direction in the lower layer.

17. In paragraph 15, The step of creating the third layer is: A method for manufacturing a display device, wherein the lower layer is composed of a chiral liquid crystal layer and the upper layer is composed of an opposite circular polarizer.

18. In paragraph 17, The step of creating the third layer is: If the upper layer is a left circular polarizer, the lower chiral liquid crystal layer generates the rotation direction of the chiral molecules to be right handed. A method for manufacturing a display device in which the chiral liquid crystal layer of the lower layer generates the rotation direction of the chiral molecules in the left handed direction when the upper layer is a right circular polarizer.

19. In Article 11 A method for manufacturing a display device, wherein the step of generating the second layer is generated to be 10 μm or less.

20. Step of emitting blue light on the first floor; A step in which color conversion occurs as the blue light passes through the second layer; and A method for implementing color in a display device, comprising a step of reflecting the blue light in a third layer and preventing transmission of the blue light in the third layer.

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