Color conversion panel and display device

Abstract

Embodiments of the present disclosure relate to a color conversion panel and a display device. Because a color conversion panel, including a color conversion region and a transmissive region separated by reflective barrier ribs, is positioned in a path of light supplied to a color filter, the color conversion panel can improve the efficiency and purity of light supplied to the color filter and increase the color gamut of light emitted to the outside through the color filter.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2021-0189245, filed on December 28, 2021, which is hereby incorporated by reference for all purposes as if fully set forth herein. Technical Field

[0003] Embodiments of the present disclosure relate to a color conversion panel and a display device. Background Art

[0004] The display device may display an image corresponding to image data by controlling brightness indicated by a plurality of sub-pixels provided on a display panel.

[0005] Each of the plurality of sub-pixels may emit light of a specific wavelength band, and a color image may be displayed by a combination of light emitted from the plurality of sub-pixels.

[0006] In order to improve the quality and color gamut of an image displayed through a display panel, it is necessary to improve the efficiency of light emitted by each of a plurality of sub-pixels and accurately control the wavelength of the light. Summary of the Invention

[0007] Embodiments of the present disclosure may provide a method for improving light efficiency of a display panel and enhancing a color gamut of an image displayed through the display panel.

[0008] Embodiments of the present disclosure may provide a display device including: a display panel including a color filter layer; a backlight unit located outside the display panel and including a plurality of light sources emitting light of a first wavelength band; and a color conversion plate located on a path through which light emitted from the backlight unit is provided to the display panel.

[0009] The color conversion plate may include: a plurality of color conversion regions having a color conversion material that converts at least a portion of light in a first wavelength band into light in a wavelength band different from the first wavelength band; a plurality of transmission regions that transmit light in the first wavelength band; and at least one reflective barrier rib disposed to separate the plurality of color conversion regions from the plurality of transmission regions and reflect incident light.

[0010] Embodiments of the present disclosure may provide a display device including: a substrate; a plurality of color conversion regions located on the substrate and having a color conversion material that converts at least a portion of light in a first wavelength band into light in a wavelength band different from the first wavelength band; a plurality of transmissive regions located on the substrate other than the plurality of color conversion regions; at least one reflective barrier rib located on the substrate and separating the plurality of color conversion regions from the plurality of transmissive regions; and a color filter layer including a plurality of color filters arranged to correspond to the plurality of color conversion regions and the plurality of transmissive regions, respectively, and at least one black matrix arranged to correspond to the at least one reflective barrier rib.

[0011] Embodiments of the present disclosure may provide a color conversion panel comprising: a transparent substrate; a plurality of first color conversion regions disposed on the transparent substrate and having a first color conversion material that converts at least a portion of light in a first wavelength band into light in a second wavelength band; and a plurality of second color conversion regions disposed on the transparent substrate and having a second color conversion material that converts at least a portion of light in the first wavelength band into light in a third wavelength band; and at least one reflective barrier rib disposed to separate the plurality of first color conversion regions and the plurality of second color conversion regions, wherein an upper surface of the at least one reflective barrier rib is positioned higher than upper surfaces of the first color conversion material and an upper surface of the second color conversion material, and wherein the upper surface of the first color conversion material is located between an upper surface of the second color conversion material and an upper surface of the at least one reflective barrier rib.

[0012] Effects of public content

[0013] According to an embodiment of the present disclosure, since a color conversion layer having a structure for separating light of respective wavelengths is positioned in a path through which light is provided to a color filter, the efficiency and purity of light provided to the color filter can be increased and the color gamut of the display panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other objects, features and advantages of the present disclosure will be more clearly understood through the following detailed description taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 is a view schematically illustrating a configuration of a display device according to various embodiments of the present disclosure;

[0016] Figure 2 is a cross-sectional view illustrating an example structure of a backlight unit according to an embodiment of the present disclosure;

[0017] Figure 3 is a cross-sectional view illustrating an example structure in which a display device according to an embodiment of the present disclosure includes a color conversion panel;

[0018] Figure 4 is a view showing an example of the wavelength of light emitted to the outside of a display device through a color conversion panel according to an embodiment of the present disclosure;

[0019] Figure 5 is a diagram illustrating an example of the wavelength of light reflected by a reflective layer included in a color conversion plate according to an embodiment of the present disclosure;

[0020] Figure 6 is a diagram illustrating an example structure in which a color conversion material is provided in a color conversion region of a color conversion plate according to an embodiment of the present disclosure;

[0021] Figure 7 is a view showing another example structure in which a color conversion material is provided in a color conversion region of a color conversion plate according to an embodiment of the present disclosure;

[0022] Figure 8 is a view showing an example in which a color conversion plate and a display panel are bonded together according to an embodiment of the present disclosure; and

[0023] Figure 9 is a view illustrating an example method for manufacturing a color conversion plate according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] In the following description of examples or embodiments of the present disclosure, reference will be made to the accompanying drawings in which specific examples or embodiments that may be implemented are shown by way of illustration, and in which the same reference numerals may be used to represent the same or similar parts even if they are shown in different drawings from one another. In addition, in the following description of examples or embodiments of the present disclosure, detailed descriptions of well-known functions and components included herein will be omitted when it is determined that the description may make the subject matter of some embodiments of the present disclosure less clear. Terms such as "including," "having," "comprising," "consisting of," and "formed of" as used herein are generally intended to allow for the addition of other parts unless such terms are used with the term "only." As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise.

[0025] Terms such as "first," "second," "A," "B," "(A)," or "(B)" may be used herein to describe elements of the present disclosure. Each of these terms is not used to define the nature, sequence, order, or quantity of an element, but is only used to distinguish the corresponding element from other elements.

[0026] When it is mentioned that a first element is “connected or coupled to,” “contacts or overlaps,” etc. a second element, it should be understood that not only the first element may be “directly connected or coupled to,” or “directly contact or overlaps,” but also a third element may be “interposed” between the first and second elements, or the first and second elements may be “connected or coupled to,” “contacts or overlaps,” etc., with each other via a fourth element. Here, the second element may be included in at least one of the two or more elements that are “connected or coupled to,” “contacts or overlaps,” etc., with each other.

[0027] When time-related terms such as “after,” “subsequently,” “next,” “before,” etc. are used to describe a process or operation of an element or configuration, or a process or step in an operation, process, or manufacturing method, these terms may be used to describe non-sequential or non-sequential processes or operations unless used with the terms “directly” or “immediately.”

[0028] Furthermore, when referring to any dimensions, relative sizes, etc., it should be considered that the numerical value or corresponding information (e.g., level, range, etc.) of an element or feature includes tolerances or error ranges that may be caused by various factors (e.g., process factors, internal or external influences, noise, etc.), even when no relevant description is specified. Furthermore, the term "may" fully encompasses all meanings of the term "can."

[0029] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0030] Figure 1 is a view schematically illustrating a configuration of a display device 100 according to various embodiments of the present disclosure.

[0031] Reference Figure 1 The display device 100 may include a display panel 110 and a gate driving circuit 120 , a data driving circuit 130 , and a controller 140 for driving the display panel 110 .

[0032] The display panel 110 may include an active area AA where a plurality of subpixels SP are disposed and an inactive area NA outside the active area AA. A plurality of gate lines GL and a plurality of data lines DL may be disposed on the display panel 110. The plurality of subpixels SP may be located in an area where the gate lines GL and the data lines DL intersect.

[0033] The gate driving circuit 120 may be controlled by the controller 140. The gate driving circuit 120 sequentially outputs scan signals to a plurality of gate lines GL disposed on the display panel 110, and may control a driving timing of a plurality of sub-pixels SP.

[0034] The gate driving circuit 120 may include one or more gate driver integrated circuits (GDICs). Depending on the driving method, the gate driving circuit 120 may be located only on one side of the display panel 110 or on each of two opposite sides.

[0035] Each gate driver integrated circuit GDIC may be connected to a bonding pad of the display panel 110 using a tape automated bonding (TAB) method or a chip on glass (COG) method. Alternatively, each gate driver integrated circuit GDIC may be implemented in a gate-in-panel (GIP) type and directly disposed on the display panel 110. Alternatively, each gate driver integrated circuit GDIC may be integrated and disposed on the display panel 110. The gate driver integrated circuit (GDIC) may also be implemented in a chip on film (COF) scheme to be mounted on a film connected to the display panel 110.

[0036] The data driving circuit 130 receives image data DATA from the timing controller 140 and converts the image data DATA into an analog data voltage. The data driving circuit 130 may output a data voltage to each data line DL according to the timing of applying a scan signal through the gate line GL, and may control each sub-pixel SP to represent brightness according to the image data.

[0037] The data driving circuit 130 may include one or more source driver integrated circuits (SDICs). Each source driver integrated circuit (SDIC) may include, for example, a shift register, a latch circuit, a digital-to-analog converter, and an output buffer.

[0038] Each source driver integrated circuit SDIC can be connected to the bonding pad of the display panel 110 using a tape automated bonding (TAB) method or a chip on glass (COG) method. Alternatively, each source driver integrated circuit SDIC can be directly provided on the display panel 110. Alternatively, each source driver integrated circuit SDIC can be integrated and provided on the display panel 110. Alternatively, each source driver integrated circuit SDIC can be implemented by a chip on film (COF) method. In this case, each source driver integrated circuit SDIC can be mounted on a film connected to the display panel 110 and can be electrically connected to the display panel 110 through a line on the film.

[0039] The controller 140 may provide various control signals to the gate driving circuit 120 and the data driving circuit 130 and control driving of the gate driving circuit 120 and the data driving circuit 130 .

[0040] The controller 140 may be mounted on a printed circuit board or a flexible printed circuit. The controller 140 may be electrically connected to the gate driving circuit 120 and the data driving circuit 130 through the printed circuit board or the flexible printed circuit.

[0041] The controller 140 can control the gate driving circuit 120 to output a scan signal according to a timing set in each frame. The controller 140 can convert image data received from the outside (e.g., a host system) according to the data signal format used by the data driving circuit 130 and output the converted image data DATA to the data driving circuit 130.

[0042] The controller 140 may receive various timing signals including a vertical synchronization signal VSYNC, a horizontal synchronization signal HSYNC, an input data enable signal DE, and a clock signal, as well as image data DATA from the outside (eg, a host system).

[0043] The controller 140 may generate various control signals using timing signals received from the outside, and output the control signals to the gate driving circuit 120 and the data driving circuit 130 .

[0044] As an example, in order to control the gate driving circuit 120 , the controller 140 may output various gate control signals GCS including a gate start pulse GSP, a gate shift clock GSC, and a gate output enable signal GOE.

[0045] The gate start pulse GSP can control the operation start timing of one or more gate driver integrated circuits GDIC constituting the gate drive circuit 120. The gate shift clock GSC is a clock signal commonly input to the one or more gate driver integrated circuits GDIC and can control the shift timing of the scan signal. The gate output enable signal GOE can specify timing information about the one or more gate driver integrated circuits GDIC.

[0046] In order to control the data driving circuit 130 , the controller 140 may output various data control signals DCS to the data driving circuit 130 , including, for example, a source start pulse SSP, a source sampling clock SSC, and a source output enable signal SOE.

[0047] The source start pulse SSP can control the data sampling start timing of one or more source driver integrated circuits SDIC constituting the data driving circuit 130. The source sampling clock SSC can be a clock signal for controlling the sampling timing of data in each of the one or more source driver integrated circuits SDIC. The source output enable signal SOE can control the output timing of the data driving circuit 130.

[0048] The display device 100 may further include a power management integrated circuit that provides various voltages or currents to, for example, the display panel 110 , the gate driving circuit 120 , and the data driving circuit 130 , or controls the various voltages or currents to be provided.

[0049] Each sub-pixel SP may be a region defined by the intersection of a gate line GL and a data line DL, and a liquid crystal layer or a light emitting element may be disposed in each sub-pixel SP according to the type of the display device 100 .

[0050] For example, if the display device 100 is an electroluminescent display device, a light-emitting element and several elements for driving the light-emitting element may be provided in each of the plurality of sub-pixels SP. The light-emitting element may be, for example, an organic light-emitting diode, an inorganic light-emitting diode, or a quantum dot light-emitting diode, but is not limited thereto. The display device 100 may control the drive current supplied to the light-emitting element by the circuit elements provided in the sub-pixels SP and display an image corresponding to the image data.

[0051] As another example, when the display device 100 is a liquid crystal display device, the display panel 110 may include a liquid crystal layer.

[0052] The display panel 110 may include, for example, a substrate on which circuit elements for driving a liquid crystal layer are provided and a substrate on which color filters for realizing colors are provided. The display device 100 may include a backlight unit that provides light to the display panel 110, and may display an image corresponding to image data by driving the liquid crystal layer and using the light provided from the backlight unit.

[0053] The backlight unit may include, for example, elements for emitting light and various optical elements for improving the efficiency of light provided to the display panel 110 and the wavelength range of the light.

[0054] Figure 2 is a cross-sectional view illustrating an example structure of a backlight unit according to an embodiment of the present disclosure.

[0055] Reference Figure 2 , the backlight unit may be located under the display panel 110 and may provide light to the display panel 110 .

[0056] The backlight unit may include a plurality of light sources 220 to provide light to the display panel 110 .

[0057] The light source 220 may be, for example, a light emitting diode and may be an ultra-small micro light emitting diode or a micro light emitting diode.

[0058] The light source 220 may be mounted on the circuit board 210. Figure 2Although not shown in the figure, the circuit board 210 on which the light source 220 is mounted and various optical elements may be accommodated by the bottom cover.

[0059] The circuit board 210 may be, for example, a flexible printed circuit. Alternatively, the circuit board 210 may be a circuit board in which signal lines or thin film transistors are provided on a rigid substrate (eg, a glass substrate).

[0060] The light source 220 can emit light according to a signal provided by a signal line provided on the circuit board 210. The light source 220 can emit light in a white wavelength band or a specific wavelength band. For example, the light source 220 can emit light in a first wavelength band. In the present disclosure, the light in the first wavelength band can refer to blue light.

[0061] The reflector 230 may be provided in at least a portion of the circuit board 210 where the light source 220 is not provided.

[0062] The reflector 230 may include a plurality of holes formed in regions corresponding to positions of the light sources 220. The reflector 230 including the holes may be positioned and disposed on the circuit board 210 on which the light sources 220 are mounted.

[0063] The upper end of the reflector 230 may be positioned higher than the upper end of the light source 220, but is not limited thereto. In some cases, a material having a high reflectivity may be coated on the circuit board 210 without the reflector 230. Alternatively, the reflector 230 may be provided on the circuit board 210 and coated with a high reflectivity material, thereby increasing the reflectivity in the entire area.

[0064] A light source protection portion 240 may be provided on the light source 220 and the reflector 230 .

[0065] The light source protecting portion 240 may be formed of, for example, resin, but is not limited thereto.

[0066] The light source protection portion 240 may protect the light source 220 and may perform a function of guiding light emitted from the light source 220 .

[0067] Various optical sheets may be disposed on the light source protecting portion 240 .

[0068] For example, a light path control film 250 may be provided on the light source protection portion 240 .

[0069] The light path control film 250 may include a base film 251 and a plurality of light path control patterns 252 disposed on at least one of an upper surface and a lower surface of the base film 251 .

[0070] The base film 251 may be a transparent film and may be made of, for example, PET, but is not limited thereto.

[0071] A plurality of light path control patterns 252 may be provided on the lower surface of the base film 251. Each of the plurality of light path control patterns 252 may be located in a region corresponding to a region where each of the plurality of light sources 220 is provided.

[0072] For example, the light path control pattern 252 may be provided only in the region on the light source 220. Alternatively, the light path control pattern 252 may be provided on the region including the light source 220 and its surroundings.

[0073] The light path control pattern 252 can be provided in a single shape or a single layer, and can be composed of multiple layers or multiple parts. When the light path control pattern 252 is composed of multiple layers or multiple parts, the material or thickness of the light path control pattern 252 can be changed so that the portion closest to the light source 220 has the highest light blocking performance, and the further away from the light source 220, the lower the light blocking performance.

[0074] The light path control pattern 252 may control a path of light emitted from the light source 220. The light path control pattern 252 may be formed of, for example, a material such as TiO2 and may have high light blocking performance, but is not limited thereto.

[0075] The light path control pattern 252 may transmit, reflect, or diffract at least a portion of light emitted from the light source 220 .

[0076] For example, the light path control pattern 252 may transmit a portion of light emitted from the light source 220 (①).

[0077] Since the light path controlling pattern 252 is formed of a material having a high light blocking property, the amount of light passing through the light path controlling pattern 252 may be very small.

[0078] The light path control pattern 252 may reflect a portion (②, ③) of light emitted from the light source 220 .

[0079] The light reflected by the light path controlling pattern 252 may be reflected to an upper portion of the light source protecting portion 240 by the reflector 230 .

[0080] The light path control pattern 252 may be provided in a region where the intensity of light emitted from the light source 220 is highest to reduce transmitted light and spread light around the light source 220 so that light may be uniformly provided to the upper portion of the light source protecting portion 240 .

[0081] A diffusion plate 260 and various optical sheets may be disposed on the light path control film 250 .

[0082] When the light source 220 emits light of the first wavelength band, a color conversion sheet 270 may be disposed on the diffusion plate 260 .

[0083] The color conversion sheet 270 may convert at least a portion of the light in the first wavelength band into light in a wavelength band different from the first wavelength band. For example, the color conversion sheet 270 may convert the light in the first wavelength band into light in a second wavelength band (e.g., green light) and light in a third wavelength band (e.g., red light).

[0084] The light of the first wavelength band emitted by the light source 220 and the light of the second wavelength band and the light of the third wavelength band converted by the color conversion sheet 270 may be mixed into light of a white wavelength band and then may be provided to the display panel 110 .

[0085] The display panel 110 may include an array substrate 111 and a color filter layer 112 . Circuit elements for driving a liquid crystal layer are disposed on the array substrate 111 , and a plurality of color filters CF are disposed on the color filter layer 112 .

[0086] The color filter layer 112 may include, for example, a red color filter CF_r, a green color filter CF_g, and a blue color filter CF_b. The color filter layer 112 may include at least one black matrix BM separating the color filters CF. The black matrix BM may prevent color mixing between adjacent sub-pixels SP.

[0087] Light of a white wavelength band provided from the backlight unit to the display panel 110 may pass through the color filter CF, and thus red, green, and blue light may be emitted to the outside of the display panel 110 .

[0088] Embodiments of the present disclosure may improve the efficiency and purity of light provided to the color filter CF and enhance the color gamut of light emitted through the color filter CF by a color conversion layer configured to separate the wavelengths of light in a path through which light is provided to the color filter CF.

[0089] Figure 3 is a cross-sectional view illustrating an example structure in which a display device 100 includes a color conversion plate 300 according to an embodiment of the present disclosure.

[0090] Reference Figure 3 , the color conversion plate 300 may be located in a path through which light is provided from the backlight unit to the display panel 110 .

[0091] For example, the color conversion plate 300 may be provided to be bonded to the display panel 110. The color conversion plate 300 may be bonded to the polarization plate 113 provided on the lower surface of the display panel 110.

[0092] The color conversion plate 300 may include a transparent substrate 310, a plurality of color conversion areas CA, and a plurality of transmissive areas TA disposed on the transparent substrate 310. The color conversion plate 300 may include at least one reflective barrier rib 330 separating the plurality of color conversion areas CA and the plurality of transmissive areas TA. The color conversion plate 300 may include a reflective layer 320 disposed on the transparent substrate 310.

[0093] A color conversion material may be provided in each of the plurality of color conversion areas CA. The color conversion material may convert at least a portion of light in a first wavelength band into light in a wavelength band different from the first wavelength band. The color conversion material may be, for example, a phosphor, but is not limited thereto.

[0094] The plurality of transmission areas TA may be areas without a color conversion material. The transmission areas TA may be transparent areas.

[0095] The color conversion plate 300 may separate the wavelength band of light provided from the backlight unit and provide it to the display panel 110 .

[0096] For example, light of a first wavelength band (eg, blue light) may be provided from the backlight unit to the color conversion panel 300 .

[0097] The plurality of color conversion areas CA may include a plurality of first color conversion areas CA1 including a first color conversion material 341 for converting at least a portion of light in a first wavelength band into light in a second wavelength band (e.g., green light). The plurality of color conversion areas CA may include a plurality of second color conversion areas CA2 including a second color conversion material 342 for converting at least a portion of light in the first wavelength band into light in a third wavelength band (e.g., red light).

[0098] Light of the second wavelength band may be provided to display panel 110 through first color conversion area CA1, and light of the third wavelength band may be provided to display panel 110 through second color conversion area CA2.

[0099] Since the transmission area TA is a region without a color conversion material, the light of the first wavelength band provided from the backlight unit may be transmitted to the display panel 110 through the transmission area TA.

[0100] The reflective barrier ribs 330 may reflect light provided from the backlight unit and light converted by the color conversion material.

[0101] The reflective barrier ribs 330 may be, for example, white resin. The reflective barrier ribs 330 may be provided using, but are not limited to, a photoimageable solder resist (PSR). The reflective barrier ribs 330 may be formed of any material having light reflectivity.

[0102] Because reflective barrier ribs 330 are located between the plurality of color conversion areas CA and the plurality of transmission areas TA, light transmitted through the color conversion areas CA and the transmission areas TA may be separated into light of the second wavelength band and light of the third wavelength band and then provided to the display panel 110 .

[0103] Each of the plurality of color conversion areas CA and the plurality of transmission areas TA may be disposed to correspond to a color filter CF disposed on the display panel 110 .

[0104] For example, the first color conversion area CA1 may be positioned to correspond to the green color filter CF_g, the second color conversion area CA2 may be positioned to correspond to the red color filter CF_r, and the transmission area TA may be positioned to correspond to the blue color filter CF_b.

[0105] Since the light separated into the first, second, and third wavelength bands by the color conversion plate 300 is provided to the corresponding color filters CF among the plurality of color filters CF, the purity of the light provided to the color filters CF can be increased. In addition, the efficiency of light emitted through the color filters CF can be increased.

[0106] The structure of providing the plurality of color conversion areas CA and the plurality of transmission areas CA and disposing the color conversion material in the plurality of color conversion areas CA may vary according to light provided from the backlight unit.

[0107] For example, when the light source 220 included in the backlight unit emits blue light, the color conversion panel 300 is<EX 1> and can have<EX 1> The same structure in .

[0108] Color conversion plate 300 may include first color conversion areas CA1 in which first color conversion material 341 is disposed and second color conversion areas CA2 in which second color conversion material 342 is disposed. Color conversion plate 300 may include transmission areas TA that transmit blue light as it is.

[0109] Blue light may be converted in the first and second color conversion areas CA1 and CA2 and transmitted through the transmission area TA, so that red, green, and blue light may be provided to the display panel 110 .

[0110] As another example, when the light source 220 included in the backlight unit emits magenta light, the color conversion panel 300 is<EX 2> and can have<EX 1> The same structure in .

[0111] Color conversion plate 300 may include first color conversion regions CA1 in which first color conversion material 341 is disposed. Color conversion plate 300 may include at least two transmissive regions TA between two first color conversion regions CA1.

[0112] Magenta light may be transmitted through first color conversion area CA1 to display panel 110. Green light may be provided to color filter CF of display panel 110 positioned to correspond to first color conversion area CA1.

[0113] Magenta light may be transmitted through the transmission area TA to the red and blue color filters CF_r and CF_b of the display panel 110. The magenta light may be transmitted through the red and blue color filters CF_r and CF_b so that the red and blue lights may be emitted to the outside of the display panel 110.

[0114] When magenta light is provided from the backlight unit, the color conversion material provided in the color conversion panel 300 may be reduced.

[0115] Even in this case, the wavelengths of light emitted through the red and blue color filters CF_r and CF_b can be more clearly distinguished because the transmissive area TA corresponding to the red and blue color filters CF_r and CF_b are separated by the reflective barrier ribs 330. Alternatively, in some cases, the reflective barrier ribs 330 may be provided between the color conversion area CA and the transmissive area TA, without the reflective barrier ribs 330 being provided between the transmissive areas TA.

[0116] As such, the structure of the color conversion area CA included in the color conversion plate 300 may vary according to the type of the light source 220 .

[0117] Since the light passing through the color conversion area CA and the transmission area TA is provided to the corresponding color filter CF, the efficiency and purity of the light emitted through the color filter CF may be improved.

[0118] Figure 4 is a view illustrating an example of the wavelength of light emitted to the outside of the display device 100 through the color conversion plate 300 according to an embodiment of the present disclosure. Figure 5 is a view illustrating an example of the wavelength of light reflected by the reflective layer 320 included in the color conversion plate 300 according to an embodiment of the present disclosure.

[0119] Figure 4 An example in which the backlight unit provides blue light is shown.

[0120] Blue light provided from the backlight unit may be transmitted through the color conversion panel 300 while being separated into red light, green light, and blue light.

[0121] The red light, the green light, and the blue light passing through the color conversion plate 300 may be provided to red, green, and blue color filters CF_r, CF_g, and CF_b, respectively disposed on the display panel 110 .

[0122] Light of each wavelength band filtered by the red, green, and blue color filters CF_r, CF_g, and CF_b may be emitted to the outside of the display panel 110 .

[0123] When the light of the wavelength bands separated when passing through the color conversion plate 300 is emitted through its corresponding color filter CF, the efficiency of the light emitted to the outside of the display panel 110 may be improved.

[0124] For example, since blue light passing through the transmission area TA of the color conversion plate 300 passes through the blue color filter CF_b, the ratio of light blocked by the blue color filter CF_b to light provided to the blue color filter CF_b may be small. In addition, the efficiency of light emitted through the blue color filter CF_b can be improved.

[0125] Since red light transmitted through the color conversion area CA of the color conversion plate 300 passes through the red color filter CF_r, the efficiency of light emitted through the red color filter CF_r can be improved. Since green light transmitted through the color conversion area CA of the color conversion plate 300 passes through the green color filter CF_g, the efficiency of light emitted through the green color filter CF_g can be improved.

[0126] Since the efficiency of light emitted to the outside of the display panel 110 is improved, the brightness of the image displayed by the display panel 110 can be improved. It is also possible to reduce power consumption of the backlight unit while displaying an image with the same brightness through the display panel 110.

[0127] Furthermore, since the lights of the separated wavelength bands reach the color filter CF and are emitted to the outside, color mixing between the lights emitted through the color filter CF may be prevented or minimized.

[0128] like Figure 4 As shown in 401, light in a wavelength band located at the boundary between blue light and green light may not be emitted to the outside of the display panel 110. Figure 4 As shown in 402 , light in a wavelength band located at the boundary between green light and red light may not be emitted to the outside of the display panel 110 .

[0129] It is possible to minimize color mixing between light emitted to the outside through each sub-pixel SP of the display panel 110. It is possible to improve a color gamut of an image displayed through the display panel 110.

[0130] By disposing reflective layer 320 below the color conversion material disposed in color conversion plate 300 , the light efficiency obtained by color conversion plate 300 may be further improved.

[0131] Reference Figure 5 , the color conversion plate 300 may include a reflective layer 320 disposed on a transparent substrate 310 .

[0132] The reflective layer 320 may be disposed between the transparent substrate 310 and the color conversion material. The reflective layer 320 may be disposed in the transmission area TA on the transparent substrate 310. In addition, the reflective layer 320 may be disposed between the transparent substrate 310 and the reflective barrier ribs 330.

[0133] The reflective layer 320 may be, for example, a film in which two types of refractive index materials are stacked in multiple layers, such as a dichroic film. Alternatively, the reflective layer 320 may be a distributed Bragg reflector (DBR). The reflective layer 320 is not limited to the above examples and may be formed of a material or structure capable of reflecting light of a specific wavelength band.

[0134] The reflective layer 320 may reflect, for example, at least a portion of light of a wavelength band other than the first wavelength band.

[0135] When the backlight unit provides blue light, the reflective layer 320 may reflect green light and red light. The reflective layer 320 may transmit the blue light and reflect the green light and red light.

[0136] Since the red light and the green light are reflected by the reflective layer 320 , the light reflected or scattered to the backlight unit among the light converted into the red light and the green light in the color conversion area CA may be reflected by the reflective layer 320 .

[0137] The amount of red light and green light converted in the color conversion area CA by the reflective layer 320 and the reflective barrier ribs 330 and provided to the display panel 110 may be increased.

[0138] Since the transmission area TA is an area surrounded by the reflective barrier ribs 330 and has no color conversion material and is positioned with an air layer, blue light may be diffused by the air layer, so that efficiency of light provided to the display panel 110 may be increased.

[0139] As such, the efficiency of light provided to each sub-pixel SP of the display panel 110 may be improved by the color conversion plate 300 .

[0140] Furthermore, light diffusion efficiency may be improved by allowing an air layer to be located in each color conversion area CA.

[0141] Figure 6 3 is a view illustrating an example structure in which a color conversion material is provided in the color conversion area CA of the color conversion plate 300 according to an embodiment of the present disclosure. Figure 7 3 is a view illustrating another example structure in which the color conversion material is provided in the color conversion area CA of the color conversion plate 300 according to an embodiment of the present disclosure.

[0142] Reference Figure 6, the color conversion plate 300 may include a transparent substrate 310 and a reflective layer 320 disposed on the transparent substrate 310 .

[0143] First and second color conversion areas CA1 and CA2 and transmissive areas TA may be positioned on reflective layer 320. Reflective barrier ribs 330 may be disposed on reflective layer 320. Reflective barrier ribs 330 may separate first and second color conversion areas CA1 and CA2 and transmissive areas TA.

[0144] A first color conversion material 341 that converts light of the first wavelength band into light of the second wavelength band may be disposed in the first color conversion area CA1, and a second color conversion material 342 that converts light of the first wavelength band into light of the third wavelength band may be disposed in the second color conversion area CA2.

[0145] The upper surfaces of the first and second color conversion materials 341 and 342 may be positioned lower than the upper surfaces of the reflective barrier ribs 330. The thicknesses Tb1 and Tb2 of the first and second color conversion materials 341 and 342 may be smaller than the thickness Ta of the reflective barrier ribs 330.

[0146] For example, the upper surface of the reflective barrier ribs 330 may be adhered to the polarizing plate 113 located below the display panel 110. The color conversion material and the polarizing plate 113 may be spaced apart from each other. An air layer may be positioned between the color conversion material and the polarizing plate 113.

[0147] The upper surface of the color conversion material may have a concave shape. The thickness of a portion of the color conversion material adjacent to the reflective barrier ribs 330 may be greater than the thickness of the remaining portion.

[0148] For example, the thickness Tb1 of the portion of the color conversion material in contact with the reflective barrier ribs 330 may be greater than the thickness Tb2 of the central portion of the color conversion material.

[0149] In disposing the color conversion material so that an air layer is located in each color conversion area CA, the upper surface of the color conversion material may appear concave due to surface tension.

[0150] Since the air layer is located on the concave upper surface of the color conversion material provided in the color conversion area CA, the diffusibility of light passing through the color conversion area CA may be improved.

[0151] For example, as shown in ①, the wavelength of light of the first wavelength band provided to the color conversion area CA may be converted and emitted upward from the color conversion plate 300. As shown in ②, a portion of the light converted in the color conversion area CA may be reflected by the polarization plate 113. As shown in ③, the light reflected by the polarization plate 113 may be reflected again by the reflective layer 320 and emitted upward from the color conversion plate 300.

[0152] Because the air layer with a low refractive index is located above the color conversion material, the light converted by the color conversion material can be diffused by the air layer. A portion of the diffused light can be emitted upward from the color conversion plate 300, while another portion of the diffused light can be reflected by the reflective layer 320 and the reflective barrier ribs 330 and emitted upward from the color conversion plate 300.

[0153] As shown in ④ , a portion of light emitted from the backlight unit and guided to the color conversion area CA may be reflected by the reflective barrier ribs 330 .

[0154] Light of the first wavelength band may be blocked in the color conversion area CA, and light of the second wavelength band and light of the third wavelength band emitted from the color conversion area CA may increase.

[0155] The amount and purity of light in each wavelength band provided to the display panel 110 may be improved.

[0156] The amount of color conversion material disposed in each color conversion area CA of color conversion plate 300 may vary according to the type of color conversion material.

[0157] For example, refer to Figure 7 , the amount of the first color conversion material 341 provided may be greater than the amount of the second color conversion material 342 provided.

[0158] Since an air layer is located on the color conversion material disposed in the color conversion area CA, the thickness Tb of the first color conversion material 341 and the thickness Tc of the second color conversion material 342 may be smaller than the thickness Ta of the reflective barrier ribs 330 .

[0159] Since the color conversion material is disposed such that an air layer is positioned above the color conversion material, the upper surface of the color conversion material may have a concave shape.

[0160] Since the amount of the first color conversion material 341 is greater than the amount of the second color conversion material 342 , the thickness Tb of the first color conversion material 341 may be greater than the thickness Tc of the second color conversion material 342 .

[0161] An upper surface of the first color conversion material 341 may be located between an upper surface of the second color conversion material 342 and an upper surface of the reflective barrier ribs 330 .

[0162] Upper surfaces of the reflective barrier ribs 330 may be adhered to the polarizing plate 113 , and an upper surface of the color conversion material may be spaced apart from the polarizing plate 113 .

[0163] The thickness of the air layer on the second color conversion material 342 may be greater than the thickness of the air layer on the first color conversion material 341 .

[0164] By changing the amount of the color conversion material provided in the color conversion area CA, light having color coordinates identical to or similar to those required for light provided to the display panel 110 may be allowed to be emitted through the color conversion plate 300 .

[0165] Accurate color coordinates can be achieved by increasing the amount of color conversion material used to convert light of the wavelength band required for the color coordinates. Since the amount of other color conversion materials is relatively reduced, the air layer in the color conversion area CA can be increased to improve light diffusion performance.

[0166] The efficiency and purity of light provided to display panel 110 can be improved by adjusting the amount of the air layer and the amount of the color conversion material, as well as the presence or absence of the color conversion material in the color conversion area CA and the transmission area TA of color conversion plate 300. The color gamut of light emitted by display panel 110 can be improved.

[0167] The color conversion plate 300 may be attached to the display panel 110. Each region of the color conversion plate 300 may be positioned to correspond to the color filter CF provided on the display panel 110.

[0168] Figure 8 1 is a view showing an example in which the color conversion plate 300 and the display panel 110 are bonded together according to an embodiment of the present disclosure.

[0169] Reference Figure 8 The color conversion plate 300 may be adhered to the polarizing plate 113 on the lower surface of the array substrate 111 of the display panel 110 by, for example, an adhesive layer 810. The color conversion plate 300 may be bonded to the array substrate 111 of the display panel 110 by a sealant 820 in the peripheral region.

[0170] The sub-pixel SP provided on the display panel 110 may include, for example, an opening portion SP_o through which light is emitted to the outside, and a non-opening portion SP_c which is a region other than the opening portion SP_o.

[0171] The first color conversion area CA1 , the second color conversion area CA2 , and the transmission area TA of the color conversion plate 300 may be positioned to correspond to the opening portion SP_o of the sub-pixel SP provided on the display panel 110 .

[0172] The reflective barrier ribs 330 of the color conversion plate 300 may be positioned to correspond to the non-opening portions SP_c provided on the display panel 110 .

[0173] The sizes of the color conversion area CA and the transmission area TA of the color conversion plate 300 may be equal to or greater than the size of the opening portion SP_o of the display panel 110 .

[0174] The second color conversion area CA2 is described as an example. <ex1>In the example shown in , the width Wb of the second color conversion area CA2 may be equal to the width Wa of the red color filter CF_r. The width of the red color filter CF_r may mean a width corresponding to the size of the opening portion SP_o of the subpixel SP.

[0175] The width of the reflective barrier ribs 330 may correspond to the width of the black matrix BM.

[0176] Since the size of the second color conversion area CA2 is the same as that of the red color filter CF_r, the loss of light provided from the second color conversion area CA2 to the red color filter CF_r may be minimized.

[0177] As another example, in<EX 2> In the example shown in , the width Wb of the second color conversion area CA2 may be greater than the width Wa of the red color filter CF_r.

[0178] A portion of second color conversion area CA2 may overlap with the black matrix BM. A width of reflective barrier rib 330 may be smaller than a width of the black matrix BM.

[0179] Since the width of second color conversion area CA2 is greater than that of red filter CF_r, alignment between the color conversion area CA and the transmissive area TA of color conversion plate 300 and opening portion SP_o of display panel 110 may be facilitated during the process of bonding color conversion plate 300 and display panel 110.

[0180] Figure 9 is a view illustrating an example method for manufacturing the color conversion plate 300 according to an embodiment of the present disclosure.

[0181] Reference Figure 9 As in step (1), a reflective layer 320 may be provided on the transparent substrate 310. As in the above example, the reflective layer 320 may be formed of a film (eg, a dichroic film) that reflects light of a specific wavelength band (eg, red light and green light).

[0182] As in step (2), for example, a PSR dry film resist (DFR) may be provided to form the reflective barrier ribs 330 on the reflective layer 320. The PSR DFR may be provided on the reflective layer 320 and cured.

[0183] As in step (3), a portion of the PSR may be removed. For example, a portion of the PSR may be removed by a process using a laser. As the PSR is removed, the reflective barrier ribs 330 may be formed. The area where the PSR has been removed may become the color conversion area CA or the transmissive area TA.

[0184] As in step (4), a color conversion material 340 may be provided in a portion of the PSR removal area. The color conversion material 340 may be provided on the surface of the reflective layer 320 by, for example, inkjet printing after plasma treatment. Thereafter, the color conversion material 340 may be cured by a UV curing process.

[0185] An upper surface of the color conversion material 340 may be positioned lower than an upper surface of the reflective barrier ribs 330. The upper surface of the color conversion material 340 may have a concave shape.

[0186] As in step (5), the display panel 110 may be bonded to the color conversion plate 300. The reflective barrier ribs 330 may be adhered to the display panel 110. An air layer may be positioned over the color conversion material 340.

[0187] The color conversion plate 300 , which improves light efficiency and color gamut of the display panel 110 , may be easily bonded to the display panel 110 through the above-described process.

[0188] Although the above examples are directed to a liquid crystal display device, the structure of the color conversion plate 300 according to an embodiment of the present disclosure may be applied to other various types of display devices.

[0189] As an example, in the case of the display device 100 in which a light emitting element is provided on the display panel 110 , a structure corresponding to the color conversion plate 300 may be provided between a region where light is emitted from the light emitting element and a region where the color filter CF is provided.

[0190] Through the color conversion plate 300 , it is possible to increase the efficiency and purity of light provided to the color filter CF, and improve the color gamut of light emitted to the outside through the color filter CF.

[0191] The aforementioned embodiment will be briefly described below.

[0192] A display device 100 according to an embodiment of the present disclosure may include: a display panel 110 including a color filter layer 112; a backlight unit located outside the display panel 110 and including a plurality of light sources 220 emitting light of a first wavelength band; and a color conversion plate 300 located on a path along which light emitted from the backlight unit is provided to the display panel 110.

[0193] The color conversion plate 300 may include: a plurality of color conversion areas CA having a color conversion material that converts at least a portion of light in a first wavelength band into light in a wavelength band other than the first wavelength band; a plurality of transmission areas TA that transmit light in the first wavelength band; and at least one reflective barrier rib 330 disposed to separate the plurality of color conversion areas CA from the plurality of transmission areas TA and reflect incident light.

[0194] The thickness of the color conversion material may be smaller than the thickness of the at least one reflective barrier rib 330 .

[0195] A thickness of a portion of the color conversion material in contact with the at least one reflective barrier rib 330 may be greater than a thickness of a remaining portion.

[0196] The upper surface of the color conversion material may be concave.

[0197] An upper surface of the at least one reflective barrier rib 330 may be adhered to the display panel 110 , and an upper surface of the color conversion material may be spaced apart from the display panel 110 .

[0198] An air layer may be positioned above the color converting material.

[0199] The plurality of color conversion areas CA may include: a plurality of first color conversion areas CA1 having a first color conversion material 341 that converts at least a portion of light in a first wavelength band into light in a second wavelength band; and a plurality of second color conversion areas CA2 having a second color conversion material 342 that converts at least a portion of light in the first wavelength band into light in a third wavelength band.

[0200] The thickness of the first color conversion material 341 may be different from the thickness of the second color conversion material 342 .

[0201] The second wavelength band may be smaller than the third wavelength band, and the thickness of the first color conversion material 341 may be greater than the thickness of the second color conversion material 342 .

[0202] The color filter layer 112 may include a plurality of color filters CF and at least one black matrix BM disposed between the plurality of color filters CF.

[0203] At least one reflective barrier rib 330 may be disposed in a region corresponding to a region where the at least one black matrix BM is disposed.

[0204] Each of the plurality of color conversion areas CA and the plurality of transmission areas TA may correspond to each of the plurality of color filters CF, and a width of each of the plurality of color conversion areas CA and the plurality of transmission areas TA may be equal to or greater than a width of each of the plurality of color filters CF.

[0205] A portion of each of the plurality of color conversion areas CA and the plurality of transmission areas TA may overlap with at least one black matrix BM.

[0206] The width of the at least one reflective barrier rib 330 may be smaller than the width of the at least one black matrix BM.

[0207] The color conversion plate 300 may include a transparent substrate 310 supporting a color conversion material and at least one reflective barrier rib 330, and a reflective layer 320 disposed between the transparent substrate 310 and the color conversion material and reflecting at least a portion of light other than the light of the first wavelength band.

[0208] The reflective layer 320 may also be disposed between the transparent substrate 310 and the at least one reflective barrier rib 330 .

[0209] At least two transmissive areas TA may be located between two color conversion areas CA among the plurality of color conversion areas CA. In this case, each of the two transmissive areas TA may be surrounded by at least one reflective barrier rib 330.

[0210] A display device 100 according to an embodiment of the present disclosure may include: a substrate; a plurality of color conversion areas CA located on the substrate and having a color conversion material that converts at least a portion of light in a first wavelength band into light in a wavelength band different from the first wavelength band; a plurality of transmission areas TA located in an area different from the plurality of color conversion areas CA on the substrate; at least one reflective barrier rib 330 located on the substrate and separating the plurality of color conversion areas CA from the plurality of transmission areas TA; and a color filter layer 112 including a plurality of color filters CF disposed to correspond to the plurality of color conversion areas CA and the plurality of transmission areas TA, respectively, and at least one black matrix BM disposed to correspond to the at least one reflective barrier rib 330.

[0211] A color conversion plate 300 according to an embodiment of the present disclosure may include: a transparent substrate 310; a plurality of first color conversion regions CA1 disposed on the transparent substrate 310 and having a first color conversion material 341 that converts at least a portion of light in a first wavelength band into light in a second wavelength band; a plurality of second color conversion regions CA2 disposed on the transparent substrate 310 and having a second color conversion material 342 that converts at least a portion of light in the first wavelength band into light in a third wavelength band; and at least one reflective barrier rib 330 disposed to separate the plurality of first color conversion regions CA1 from the plurality of second color conversion regions CA2.

[0212] The upper surface of the at least one reflective barrier rib 330 may be positioned higher than the upper surface of the first color conversion material 341 and the upper surface of the second color conversion material 342. The upper surface of the first color conversion material 341 may be located between the upper surface of the second color conversion material 342 and the upper surface of the at least one reflective barrier rib 330.

[0213] Color conversion plate 300 may further include a plurality of transmissive areas TA disposed in an area different from the plurality of first color conversion areas CA1 and the plurality of second color conversion areas CA2 and surrounded by at least one reflective barrier rib 330 .

[0214] The color conversion plate 300 may further include a reflective layer 320 disposed on the transparent substrate 310 and below the first color conversion material 341 , the second color conversion material 342 , and the at least one reflective barrier rib 330 .

[0215] The above description has been presented to enable any person skilled in the art to make and use the technical concepts of the present disclosure, and has been provided in the context of a specific application and its requirements. Various modifications, additions and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the present disclosure. The above description and accompanying drawings provide examples of the technical concepts of the present disclosure for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical concepts of the present disclosure. Therefore, the scope of the present disclosure is not limited to the embodiments shown, but is to be consistent with the widest scope consistent with the claims. The scope of protection of the present disclosure should be understood based on the appended claims, and all technical concepts that fall within their equivalent scope should be understood to be included within the scope of the present disclosure.

Claims

1. A display device comprising: a display panel including a color filter layer; a backlight unit located outside the display panel and comprising a plurality of light sources emitting light of a first wavelength band; as well as a color conversion plate located on a path along which light emitted from the backlight unit is provided to the display panel; Wherein, the color conversion plate includes: a plurality of color conversion regions, the plurality of color conversion regions having a color conversion material that converts at least a portion of the light in the first wavelength band into light in a wavelength band different from the first wavelength band; a plurality of transmission areas, the plurality of transmission areas transmitting light of the first wavelength band; and at least one reflective barrier rib disposed to separate the plurality of color conversion regions and the plurality of transmission regions and reflect incident light wherein an upper surface of the at least one reflective barrier rib is adhered to the display panel, and an upper surface of the color conversion material is spaced apart from the display panel, wherein the air layer is located on the color conversion material, Wherein, the plurality of color conversion areas include: a plurality of first color conversion regions having a first color conversion material that converts at least a portion of the light in the first wavelength band into light in a second wavelength band; and a plurality of second color conversion regions, each having a second color conversion material that converts at least a portion of light in the first wavelength band into light in a third wavelength band, wherein the second wavelength band is smaller than the third wavelength band, and a thickness of the first color conversion material is greater than a thickness of the second color conversion material, and The thickness of the air layer on the second color conversion material is greater than the thickness of the air layer on the first color conversion material.

2. The display device according to claim 1, wherein The thickness of the color conversion material is smaller than the thickness of the at least one reflective barrier rib.

3. The display device according to claim 1, wherein A thickness of a portion of the color conversion material contacting the at least one reflective barrier rib is greater than a thickness of a remaining portion.

4. The display device according to claim 1, wherein The upper surface of the color conversion material is concave.

5. The display device according to claim 1, wherein The color filter layer includes a plurality of color filters and at least one black matrix disposed between the plurality of color filters, and Wherein, one of the at least one reflective barrier ribs is disposed in a region corresponding to a region where one of the at least one black matrix is ​​disposed. The display device according to claim 5 , wherein: Each of the plurality of color conversion regions and the plurality of transmission regions corresponds to a corresponding one of the plurality of color filters, and a width of each of the plurality of color conversion regions and the plurality of transmission regions is equal to or greater than a width of each of the plurality of color filters.

7. The display device according to claim 5, wherein: A portion of each of the plurality of color conversion regions and the plurality of transmission regions overlaps with a corresponding one of the at least one black matrix.

8. The display device according to claim 5, wherein A width of one of the at least one reflective barrier rib is smaller than a width of one of the at least one black matrix.

9. The display device according to claim 1, wherein The color conversion plate includes: a transparent substrate supporting the color conversion material and the at least one reflective barrier rib; and A reflective layer is provided between the transparent substrate and the color conversion material and reflects at least a portion of light different from the light in the first wavelength band.

10. The display device according to claim 9, wherein The reflective layer is further disposed between the transparent substrate and the at least one reflective barrier rib.

11. The display device according to claim 1, wherein At least two of the plurality of transmissive regions are located between two of the plurality of color conversion regions, and each of the at least two transmissive regions is surrounded by the at least one reflective barrier rib.

12. A display device comprising: substrate; a plurality of color conversion regions located on the substrate and having a color conversion material that converts at least a portion of light in a first wavelength band into light in a wavelength band different from the first wavelength band; a plurality of transmission regions, the plurality of transmission regions being located in regions other than the plurality of color conversion regions on the substrate; at least one reflective barrier rib on the substrate and separating the plurality of color conversion regions from the plurality of transmissive regions; as well as a color filter layer including a plurality of color filters disposed to correspond to the plurality of color conversion regions and the plurality of transmission regions, respectively, and at least one black matrix disposed to correspond to the at least one reflective barrier rib, wherein an upper surface of the at least one reflective barrier rib is adhered to the display panel, and an upper surface of the color conversion material is spaced apart from the display panel, wherein the air layer is located on the color conversion material, Wherein, the plurality of color conversion areas include: a plurality of first color conversion regions having a first color conversion material that converts at least a portion of the light in the first wavelength band into light in a second wavelength band; and a plurality of second color conversion regions, each of the plurality of second color conversion regions having a second color conversion material that converts at least a portion of the light in the first wavelength band into light in a third wavelength band; wherein the second wavelength band is smaller than the third wavelength band, and the thickness of the first color conversion material is greater than the thickness of the second color conversion material, and The thickness of the air layer on the second color conversion material is greater than the thickness of the air layer on the first color conversion material.

13. The display device according to claim 12, in, The substrate is a transparent substrate; wherein an upper surface of the at least one reflective barrier rib is positioned higher than upper surfaces of the first color conversion material and the second color conversion material, and wherein an upper surface of the first color conversion material is located between an upper surface of the second color conversion material and an upper surface of the at least one reflective barrier rib.

14. The display device according to claim 13, wherein: The plurality of transmissive regions are disposed in a region different from the plurality of first color conversion regions and the plurality of second color conversion regions and are surrounded by the at least one reflective barrier rib. 15 . The display device of claim 13 , further comprising a reflective layer disposed on the transparent substrate and below the first color conversion material, the second color conversion material, and the at least one reflective barrier rib.

Images