Display device

Abstract

A display device can include a first substrate including a first area, a second area adjacent to the first area, and a third area adjacent to the second area; a plurality of light emitting layers disposed on the first substrate; a first anti-reflection layer disposed on the plurality of light emitting layers to transmit light having a first color; a second anti-reflection layer disposed on the plurality of light emitting layers to transmit light having a second color different from the first color and light having a third color different from the first color and the second color; and a second substrate disposed on the first anti-reflection layer and the second anti-reflection layer.

Description

Technical Field

[0001] This invention relates to a display device, and more particularly to a display device including an anti-reflection layer. Background Technology

[0002] Although glass substrates used in flat panel displays are lightweight materials with excellent transmittance and flatness, a drawback is their high surface reflectivity. One method to address the reduced visibility and increase contrast caused by such surface reflection is the use of anti-reflection coatings (ARC), which remove light reflected from the glass substrate surface.

[0003] Anti-reflection coating (ARC) is a method that reduces surface-induced reflections and improves light transmittance by attaching an anti-reflective coating layer to the surface of a glass substrate. Such anti-reflective coatings can be manufactured using a variety of materials and coating methods. Summary of the Invention

[0004] The purpose of this invention is to provide a display device including an anti-reflection layer.

[0005] However, the purpose of this invention is not limited to the above-mentioned purpose, and various extensions can be achieved without departing from the spirit and scope of this invention.

[0006] A display device according to an embodiment of the present invention for achieving the above-described objectives may include: a first substrate, including a first region, a second region adjacent to the first region, and a third region adjacent to the second region; a plurality of light-emitting layers disposed on the first substrate; a first anti-reflection layer disposed on the plurality of light-emitting layers to transmit light having a first color; a second anti-reflection layer disposed on the plurality of light-emitting layers to transmit light having a second color different from the first color and light having a third color different from both the first and second colors; and a second substrate disposed on the first anti-reflection layer and the second anti-reflection layer.

[0007] In an embodiment, the plurality of light-emitting layers may include: a first light-emitting layer that emits red light and overlaps with the first region; a second light-emitting layer that emits green light and overlaps with the second region; and a third light-emitting layer that emits blue light and overlaps with the third region.

[0008] In one embodiment, the first anti-reflection layer may overlap with the first region and contact the second substrate, and the second anti-reflection layer may overlap with the second region and the third region and contact the second substrate.

[0009] In this embodiment, the first color can be red, the second color can be green, and the third color can be blue.

[0010] In an embodiment, the first anti-reflection layer may overlap with the first region and contact the second anti-reflection layer, and the second anti-reflection layer may overlap with the first region, the second region and the third region, and contact the second substrate.

[0011] In an embodiment, the second anti-reflection layer can also allow light of the first color to pass through.

[0012] In this embodiment, the first color can be red, the second color can be green, and the third color can be blue.

[0013] In an embodiment, the material included in the first anti-reflection layer may be different from the material included in the second anti-reflection layer.

[0014] In an embodiment, the thickness of the first anti-reflection layer may be different from the thickness of the second anti-reflection layer.

[0015] In an embodiment, the thickness of the first anti-reflection layer and the thickness of the second anti-reflection layer may be the same.

[0016] In an embodiment, at least one of the first anti-reflection layer and the second anti-reflection layer may include multiple layers.

[0017] In this embodiment, the refractive indices of the multiple layers may be different.

[0018] A display device according to another embodiment for achieving the above-described object of the present invention may include: a first substrate, including a first region, a second region adjacent to the first region, and a third region adjacent to the second region; a plurality of light-emitting layers disposed on the first substrate; a first anti-reflection layer disposed on the plurality of light-emitting layers to transmit light having a first color; a second anti-reflection layer disposed on the plurality of light-emitting layers to transmit light having a second color different from the first color; a third anti-reflection layer disposed on the plurality of light-emitting layers to transmit light having a third color different from the first color and the second color; and a second substrate disposed on the first anti-reflection layer, the second anti-reflection layer, and the third anti-reflection layer.

[0019] In an embodiment, the plurality of light-emitting layers may include: a first light-emitting layer that emits red light and overlaps with the first region; a second light-emitting layer that emits green light and overlaps with the second region; and a third light-emitting layer that emits blue light and overlaps with the third region.

[0020] In one embodiment, the first anti-reflection layer may overlap with the first region and contact the second substrate, the second anti-reflection layer may overlap with the second region and contact the second substrate, and the third anti-reflection layer may overlap with the third region and contact the second substrate.

[0021] In this embodiment, the first color can be red, the second color can be green, and the third color can be blue.

[0022] In an embodiment, the substances included in the first anti-reflection layer, the second anti-reflection layer, and the third anti-reflection layer may be different.

[0023] In an embodiment, the thicknesses of the first anti-reflection layer, the second anti-reflection layer, and the third anti-reflection layer may be different.

[0024] In an embodiment, the thicknesses of the first anti-reflection layer, the second anti-reflection layer, and the third anti-reflection layer may be the same.

[0025] In an embodiment, at least one of the first anti-reflection layer, the second anti-reflection layer, and the third anti-reflection layer may include multiple layers, and the refractive indices of the multiple layers may be different.

[0026] According to an embodiment of the present invention, a reflection-preventing layer may be attached to the lower surface of the second substrate. Accordingly, the reflectivity of light emitted from the organic light-emitting diode (OLED) relative to the lower surface of the second substrate can be reduced, interference between the light emitted from the OLED and the lower surface of the second substrate can be reduced, and color variations in rainbow patterns can be reduced.

[0027] However, the effects of the present invention are not limited to those described above, and various extensions can be achieved without departing from the spirit and scope of the present invention. Attached Figure Description

[0028] Figure 1 This is a block diagram illustrating a display device according to an embodiment of the present invention.

[0029] Figure 2 It is shown Figure 1 A cross-sectional view of an example of a display section included in a display device.

[0030] Figure 3 It is shown Figure 2 A floor plan of the display section.

[0031] Figure 4 and Figure 5This is a diagram illustrating the reflectivity at the lower surface of the second substrate included in a display device according to an embodiment of the present invention.

[0032] Figure 6 It is shown Figure 1 A cross-sectional view of another example of a display section included in a display device.

[0033] Figure 7 It is shown Figure 6 A floor plan of the display section.

[0034] Figure 8 It is shown Figure 1 A cross-sectional view of another example of a display unit included in a display device.

[0035] Figure 9 It is shown Figure 8 A floor plan of the display section.

[0036] Explanation of reference numerals in the attached figures

[0037] 111, 112, 113: Display units 200a, 200b: First substrate, second substrate

[0038] 210: Buffer layer 220: Active layer

[0039] 230: Gate insulating layer; 240: Gate electrode

[0040] 250: Interlayer insulation layer; 270: Through-hole layer

[0041] 290: Pixel definition film; 320: Spacer.

[0042] 280: Lower electrode; 330: Upper electrode

[0043] 260a: Source electrode; 260b: Drain electrode

[0044] CPL: Overlay

[0045] DA1, DA2, DA3: Region 1, Region 2, Region 3

[0046] PX1, PX2, PX3: First sub-pixel, Second sub-pixel, Third sub-pixel

[0047] 310a, 310b, 310c: First light-emitting layer, second light-emitting layer, third light-emitting layer

[0048] R, G, B: Red light, Green light, Blue light Detailed Implementation

[0049] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings, and repeated descriptions of the same constituent elements are omitted.

[0050] Figure 1 This is a block diagram illustrating a display device according to an embodiment of the present invention.

[0051] Reference Figure 1 The display device 100 may include a display unit 110, a timing control unit 120, a data driving unit 130, a scanning driving unit 140, and a light-emitting driving unit 150.

[0052] The display unit 110 may include a plurality of sub-pixels PX. The plurality of sub-pixels PX may be connected to a plurality of scan lines SL1, SL2, SL3, ..., SLN, a plurality of data lines DL1, DL2, DL3, ..., DLM, and a plurality of light emission control lines EL1, EL2, EL3, ..., ELN (where N and M are natural numbers greater than 1).

[0053] Data lines DL1, DL2, DL3, ..., DLM can be connected to the data driver unit 130 to transmit data voltage to the sub-pixel PX. Scan lines SL1, SL2, SL3, ..., SLN can be connected to the scan driver unit 140 to transmit scan signals to the sub-pixel PX. Light emission control lines EL1, EL2, EL3, ..., ELN can be connected to the light emission driver unit 150 to transmit light emission control signals to the sub-pixel PX.

[0054] Sub-pixels PX can receive a driving voltage ELVDD and a common voltage ELVSS. Each sub-pixel PX can receive the data voltage in response to the scan signal, and can generate light with a gray level corresponding to the data voltage using the driving voltage ELVDD and the common voltage ELVSS.

[0055] The data driver unit 130 can convert the first data signal DATA1 into the data voltage in response to the first control signal CONT1, and output the data voltage to the data lines DL1, DL2, DL3, ..., DLM.

[0056] The scan drive unit 140 can generate the scan signal in response to the second control signal CONT2.

[0057] The light-emitting drive unit 150 can generate the light-emitting control signal in response to the third control signal CONT3.

[0058] The timing control unit 120 can receive data signals DATA and control signals CONT from an external device. In this embodiment, the data signal DATA may include red image data, green image data, and blue image data. The control signal CONT may include a horizontal synchronization signal, a vertical synchronization signal, and a master clock signal, etc.

[0059] The timing control unit 120 can generate a first control signal CONT1 for driving the data driving unit 130, a second control signal CONT2 for driving the scan driving unit 140, and a third control signal CONT3 for driving the light-emitting driving unit 150 based on the control signal CONT.

[0060] Figure 2 It is shown Figure 1 A cross-sectional view of an example of a display unit included in a display device. Figure 3 It is shown Figure 2 A floor plan of the display section.

[0061] Reference Figure 2 The display unit 111 may include a first substrate 200a, a source electrode 260a, a drain electrode 260b, a buffer layer 210, an active layer 220, a gate electrode 240, a gate insulating layer 230, an interlayer insulating layer 250, a lower electrode 280, a via layer 270, a first light-emitting layer 310a, a second light-emitting layer 310b, a third light-emitting layer 310c, an upper electrode 330, a cover layer CPL, a pixel definition film 290, a spacer 320, a second substrate 200b, a first anti-reflection layer 340a, and a second anti-reflection layer 340b.

[0062] The display unit 111 may include a plurality of sub-pixels PX. Each sub-pixel PX may include a first sub-pixel PX1, a second sub-pixel PX2, and a third sub-pixel PX3.

[0063] The first sub-pixel PX1 may include a lower electrode 280, a first light-emitting layer 310a, and an upper electrode 330. The second sub-pixel PX2 may include a lower electrode 280, a second light-emitting layer 310b, and an upper electrode 330. The third sub-pixel PX3 may include a lower electrode 280, a third light-emitting layer 310c, and an upper electrode 330.

[0064] The first substrate 200a may include a first region DA1, a second region DA2, and a third region DA3. The first substrate 200a may include a transparent material or an opaque material. For example, the first substrate 200a may include a quartz substrate, a synthetic quartz substrate, a calcium fluoride substrate, a soda-lime glass substrate, an alkali-free glass substrate, etc.

[0065] The first sub-pixel PX1 can overlap with the first region DA1, the second sub-pixel PX2 can overlap with the second region DA2, and the third sub-pixel PX3 can overlap with the third region DA3.

[0066] A buffer layer 210 may be disposed on the first substrate 200a. The buffer layer 210 may include inorganic materials such as oxides or nitrides. The buffer layer 210 can prevent metal atoms or impurities from diffusing from the first substrate 200a to the thin-film transistor.

[0067] Thin-film transistors are arranged on the buffer layer 210 for the first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3, respectively. The thin-film transistors may include an active layer 220, a gate electrode 240, a source electrode 260a, and a drain electrode 260b.

[0068] An active layer 220 may be disposed on the buffer layer 210. The active layer 220 may include a silicon semiconductor or an oxide semiconductor. In one embodiment, the active layer 220 may include a silicon semiconductor containing polysilicon. In another embodiment, the active layer 220 may include an oxide semiconductor containing indium (In), zinc (Zn), gallium (Ga), tin (Sn), titanium (Ti), aluminum (Al), hafnium (Hf), zirconium (Zr), magnesium (Mg), etc.

[0069] A gate insulating layer 230 may be disposed on the buffer layer 210. The gate insulating layer 230 may cover the active layer 220. The gate insulating layer 230 may include silicon oxide (SiO2). x ), silicon nitride (SiN) x ), silicon carbide (SiC) x ) or combinations thereof.

[0070] A gate electrode 240 may be disposed on the gate insulating layer 230. The gate electrode 240 may be disposed overlapping the active layer 220. The gate electrode 240 may include metals such as aluminum (Al), silver (Ag), chromium (Cr), titanium (Ti), tantalum (Ta), molybdenum (Mo), their alloys, their nitrides, conductive metal oxides, transparent conductive materials, etc.

[0071] An interlayer insulating layer 250 may be disposed on the gate insulating layer 230. The interlayer insulating layer 250 may cover the gate electrode 240. The interlayer insulating layer 250 may include silicon oxide, silicon nitride, silicon oxide nitride, etc. In one embodiment, the interlayer insulating layer 250 may be formed using a monolayer comprising a single material.

[0072] An active electrode 260a and a drain electrode 260b may be disposed on the interlayer insulating layer 250. The source electrode 260a and the drain electrode 260b may penetrate the gate insulating layer 230 and the interlayer insulating layer 250 to contact the active layer 220. Therefore, the source electrode 260a and the drain electrode 260b may be electrically connected to the active layer 220.

[0073] A via layer 270 may be disposed on the interlayer insulating layer 250. The via layer 270 may cover the source electrode 260a and the drain electrode 260b. The via layer 270 may include organic insulating materials such as phenolic resin, acrylic resin, polyimide resin, polyamide resin, silicone resin, and epoxy resin.

[0074] A lower electrode 280 may be arranged on the via layer 270. The lower electrode 280 may penetrate the via layer 270 and be electrically connected to the drain electrode 260b.

[0075] A pixel definition film 290 may be disposed on the via layer 270. The pixel definition film 290 may have an opening that exposes at least a portion of the lower electrode 280. For example, the pixel definition film 290 may include an organic insulating material.

[0076] A light-emitting layer may be disposed on the lower electrode 280. The light-emitting layer may include a first light-emitting layer 310a, a second light-emitting layer 310b, and a third light-emitting layer 310c. The first light-emitting layer 310a may overlap with the first region DA1, the second light-emitting layer 310b may overlap with the second region DA2, and the third light-emitting layer 310c may overlap with the third region DA3.

[0077] In one embodiment, the first light-emitting layer 310a emits red light R, the second light-emitting layer 310b emits green light G, and the third light-emitting layer 310c emits blue light B. The first light-emitting layer 310a, the second light-emitting layer 310b, and the third light-emitting layer 310c may include at least one of the functional layers such as a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer, in a single-layer or multi-layer structure. The first light-emitting layer 310a, the second light-emitting layer 310b, and the third light-emitting layer 310c may include low-molecular-weight organic compounds or high-molecular-weight organic compounds.

[0078] Spacers 320 may be arranged on the pixel defining film 290. The spacers 320 may be arranged in a manner that is adjacent to the outside of the opening.

[0079] An upper electrode 330 may be disposed on the first light-emitting layer 310a, the second light-emitting layer 310b, and the third light-emitting layer 310c. Specifically, the upper electrode 330 may be disposed to completely cover the first light-emitting layer 310a, the second light-emitting layer 310b, the third light-emitting layer 310c, the pixel defining film 290, and the spacer 320. In one embodiment, the upper electrode 330 may span across... Figure 1 The multiple sub-pixels PX shown are in the display section 111 (in Figure 1 (In the figure, indicated by the reference numeral "110") extends continuously within.

[0080] A cover layer CPL for protecting the upper electrode 330 may be disposed on the upper electrode 330. The cover layer CPL may be disposed over the entire upper electrode 330. In one embodiment, the cover layer CPL may span across... Figure 1 The multiple sub-pixels PX shown are in the display section 111 (in Figure 1 In the figure, (indicated by reference numeral "110") extends continuously within. For example, the cover layer CPL may include organic insulating materials and / or inorganic insulating materials.

[0081] The lower electrode 280, the first light-emitting layer 310a, the second light-emitting layer 310b, the third light-emitting layer 310c, and the upper electrode 330 can be defined as an organic light-emitting diode (OLED).

[0082] An air gap may exist between the cover layer CPL and the second substrate 200b.

[0083] Depending on the viewing angle of the user viewing the display device 100, different color changes may be visually perceived. For example, in the presence of the air gap, interference occurs between the light emitted from the organic light-emitting diode and the lower surface of the second substrate 200b, resulting in rainbow-like color changes.

[0084] In one embodiment, a first anti-reflection layer 340a and a second anti-reflection layer 340b may be disposed on the cover layer CPL. The first anti-reflection layer 340a and the second anti-reflection layer 340b can improve the light transmittance of light emitted from the organic light-emitting diode. Accordingly, the reflectivity of light emitted from the organic light-emitting diode relative to the second substrate 200b is reduced, and the interference between the light emitted from the organic light-emitting diode and the lower surface of the second substrate 200b is reduced, thereby reducing the color variation of the rainbow pattern.

[0085] exist Figure 3In the diagram, A is a plan view of the display device 100 before the first anti-reflection layer 340a and the second anti-reflection layer 340b are arranged on the cover layer CPL. B is a plan view of the display device 100 after the first anti-reflection layer 340a and the second anti-reflection layer 340b are arranged on the cover layer CPL.

[0086] In one embodiment, the first anti-reflection layer 340a may overlap with the first region DA1, and the second anti-reflection layer 340b may overlap with the second region DA2 and the third region DA3. The first anti-reflection layer 340a allows light of a first color to pass through, and the second anti-reflection layer 340b allows light of a second color and a third color to pass through. For example, the first anti-reflection layer 340a allows red light R to pass through, and the second anti-reflection layer 340b allows green light G and blue light B to pass through.

[0087] In one embodiment, each of the first anti-reflection layer 340a and the second anti-reflection layer 340b may include a low-refractive-index oxide such as silicon dioxide (SiO2). In another embodiment, each of the first anti-reflection layer 340a and the second anti-reflection layer 340b may include a high-refractive-index oxide such as titanium dioxide (TiO2), zirconium dioxide (ZrO2), lithium niobate (LiNbO3), lithium tantalate (LiTaO3), or lanthanum titanate (LaTiO3).

[0088] In one embodiment, the material included in the first anti-reflection layer 340a may be different from the material included in the second anti-reflection layer 340b.

[0089] In one embodiment, the thickness of the first anti-reflection layer 340a and the thickness of the second anti-reflection layer 340b may be different. For example, the thickness of the first anti-reflection layer 340a may be greater than the thickness of the second anti-reflection layer 340b. In another embodiment, the thickness of the first anti-reflection layer 340a may be less than the thickness of the second anti-reflection layer 340b.

[0090] In another embodiment, the thickness of the first anti-reflection layer 340a and the thickness of the second anti-reflection layer 340b can be the same. In this case, the refractive index of the first anti-reflection layer 340a and the refractive index of the second anti-reflection layer 340b can be different.

[0091] At least one of the first anti-reflection layer 340a and the second anti-reflection layer 340b may include multiple layers. According to one embodiment, the multiple layers may be a stacked structure. For example, the first anti-reflection layer 340a may include a first layer 341a and a second layer 342a disposed on the first layer 341a. The second anti-reflection layer 340b may include a third layer 341b and a fourth layer 342b disposed on the third layer 341b. However, the present invention is not limited thereto.

[0092] The refractive indices of the multiple layers can be different. For example, the difference in refractive index at the interfaces of the multiple layers can be greater than 0.1.

[0093] A second substrate 200b may be disposed on the first anti-reflection layer 340a and the second anti-reflection layer 340b.

[0094] The first anti-reflection layer 340a and the second anti-reflection layer 340b can contact the second substrate 200b. Specifically, the first anti-reflection layer 340a and the second anti-reflection layer 340b can contact the lower surface of the second substrate 200b.

[0095] In one embodiment, the first anti-reflection layer 340a and the second anti-reflection layer 340b can be formed on the lower surface of the second substrate 200b in the form of a coating or a film by a chemical vapor deposition (CVD) process.

[0096] Figure 4 and Figure 5 This is a diagram illustrating the reflectivity at the lower surface of the second substrate included in a display device according to an embodiment of the present invention.

[0097] Reference Figure 4 and Figure 5 The X-axis represents the wavelengths of the red spectrum SP1, green spectrum SP2, and blue spectrum SP3. The left side of the Y-axis represents the relative intensity (%) of the red spectrum SP1, green spectrum SP2, and blue spectrum SP3, while the right side of the Y-axis represents the reflectance (%) of the light emitted from the organic light-emitting diode to the lower surface of the second substrate 200b.

[0098] The red spectrum SP1 can have a wavelength of about 610 nm to about 760 nm, the green spectrum SP2 can have a wavelength of about 500 nm to about 560 nm, and the blue spectrum SP3 can have a wavelength of about 435 nm to about 480 nm.

[0099] exist Figure 4In this configuration, a second anti-reflection layer 340b, which allows green light G and blue light B to be transmitted, is in contact with the lower surface of the second substrate 200b. Accordingly, the reflectivity ① of green light G and blue light B to the lower surface of the second substrate 200b can be from about 4% to about 8%.

[0100] exist Figure 5 In this configuration, a first anti-reflection layer 340a, which allows red light R to be transmitted, can be placed in contact with the lower surface of the second substrate 200b. Accordingly, the reflectivity ② of red light R relative to the lower surface of the second substrate 200b can be from about 4% to about 8%.

[0101] Figure 6 It is shown Figure 1 A cross-sectional view of another example of a display unit included in a display device. Figure 7 It is shown Figure 6 A floor plan of the display section.

[0102] Reference Figure 6 The display unit 112 may include a first substrate 200a, a source electrode 260a, a drain electrode 260b, a buffer layer 210, an active layer 220, a gate electrode 240, a gate insulating layer 230, an interlayer insulating layer 250, a via layer 270, a lower electrode 280, a first light-emitting layer 310a, a second light-emitting layer 310b, a third light-emitting layer 310c, an upper electrode 330, a cover layer CPL, a pixel definition film 290, a spacer 320, a second substrate 200b, a first anti-reflection layer 350a, and a second anti-reflection layer 350b. However, except for the first anti-reflection layer 350a and the second anti-reflection layer 350b, the display unit 112 may be connected to a reference. Figure 2 The display unit 111 is substantially the same. Hereinafter, the first anti-reflection layer 350a and the second anti-reflection layer 350b will be mainly described.

[0103] According to one embodiment, a first anti-reflection layer 350a and a second anti-reflection layer 350b may be arranged on the cover layer CPL.

[0104] exist Figure 7 In the diagram, A is a plan view of the display device 100 before the first anti-reflection layer 350a and the second anti-reflection layer 350b are arranged on the cover layer CPL. B is a plan view of the display device 100 after the first anti-reflection layer 350a and the second anti-reflection layer 350b are arranged on the cover layer CPL.

[0105] In one embodiment, the first anti-reflection layer 350a may overlap with the first region DA1, and the second anti-reflection layer 350b may overlap with the first region DA1, the second region DA2, and the third region DA3. The first anti-reflection layer 350a allows light of a first color to pass through, and the second anti-reflection layer 350b allows light of the first color, the second color, and the third color to pass through. For example, the first anti-reflection layer 350a allows red light R to pass through, and the second anti-reflection layer 350b allows red light R, green light G, and blue light B to pass through.

[0106] In one embodiment, each of the first anti-reflection layer 350a and the second anti-reflection layer 350b may include a low-refractive-index oxide such as silicon dioxide (SiO2). In another embodiment, each of the first anti-reflection layer 350a and the second anti-reflection layer 350b may include a high-refractive-index oxide such as titanium dioxide (TiO2), zirconium dioxide (ZrO2), lithium niobate (LiNbO3), lithium tantalate (LiTaO3), or lanthanum titanate (LaTiO3).

[0107] In one embodiment, the material included in the first anti-reflection layer 350a may be different from the material included in the second anti-reflection layer 350b.

[0108] In one embodiment, the thickness of the first anti-reflection layer 350a and the thickness of the second anti-reflection layer 350b may be different. For example, the thickness of the first anti-reflection layer 350a may be greater than the thickness of the second anti-reflection layer 350b. In another embodiment, the thickness of the first anti-reflection layer 350a may be less than the thickness of the second anti-reflection layer 350b.

[0109] In another embodiment, the thickness of the first anti-reflection layer 350a and the thickness of the second anti-reflection layer 350b can be the same. In this case, the refractive index of the first anti-reflection layer 350a and the refractive index of the second anti-reflection layer 350b can be different.

[0110] At least one of the first anti-reflection layer 350a and the second anti-reflection layer 350b may include multiple layers. According to one embodiment, the multiple layers may be a stacked structure. For example, the first anti-reflection layer 350a may include a first layer 351a and a second layer 352a disposed on the first layer 351a. The second anti-reflection layer 350b may include a third layer 351b and a fourth layer 352b disposed on the third layer 351b. However, the present invention is not limited thereto.

[0111] The refractive indices of the multiple layers can be different. For example, the difference in refractive index at the interfaces of the multiple layers can be greater than 0.1.

[0112] A second substrate 200b may be disposed on the first anti-reflection layer 350a and the second anti-reflection layer 350b.

[0113] The first anti-reflection layer 350a can contact the second anti-reflection layer 350b, and the second anti-reflection layer 350b can contact the second substrate 200b. Specifically, the first anti-reflection layer 350a can contact the lower surface of the second anti-reflection layer 350b, and the second anti-reflection layer 350b can contact the lower surface of the second substrate 200b.

[0114] In one embodiment, the first anti-reflection layer 350a and the second anti-reflection layer 350b can be formed on the lower surface of the second substrate 200b in the form of a coating or a film by a chemical vapor deposition (CVD) process.

[0115] Figure 8 It is shown Figure 1 A cross-sectional view of another example of a display unit included in a display device. Figure 9 It is shown Figure 8 A floor plan of the display section.

[0116] Reference Figure 8 The display unit 113 may include a first substrate 200a, a source electrode 260a, a drain electrode 260b, a buffer layer 210, an active layer 220, a gate electrode 240, a gate insulating layer 230, an interlayer insulating layer 250, a via layer 270, a lower electrode 280, a first light-emitting layer 310a, a second light-emitting layer 310b, a third light-emitting layer 310c, an upper electrode 330, a cover layer CPL, a pixel definition film 290, a spacer 320, a second substrate 200b, a first anti-reflection layer 360a, a second anti-reflection layer 360b, and a third anti-reflection layer 360c. However, except for the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c, the display unit 113 may be connected to a reference. Figure 2 The display unit 111 is substantially the same. Hereinafter, the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c will be mainly described.

[0117] According to one embodiment, a first anti-reflection layer 360a, a second anti-reflection layer 360b, and a third anti-reflection layer 360c may be arranged on the cover layer CPL.

[0118] exist Figure 9In the diagram, A is a plan view of the display device 100 before the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c are arranged on the cover layer CPL. B is a plan view of the display device 100 after the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c are arranged on the cover layer CPL.

[0119] In one embodiment, the first anti-reflection layer 360a may overlap with the first region DA1, the second anti-reflection layer 360b may overlap with the second region DA2, and the third anti-reflection layer 360c may overlap with the third region DA3. The first anti-reflection layer 360a allows light of a first color to pass through, the second anti-reflection layer 360b allows light of a second color to pass through, and the third anti-reflection layer 360c allows light of a third color to pass through. For example, the first anti-reflection layer 360a allows red light R to pass through, the second anti-reflection layer 360b allows green light G to pass through, and the third anti-reflection layer 360c allows blue light B to pass through.

[0120] In one embodiment, each of the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c may include a low-refractive-index oxide such as silicon dioxide (SiO2). In another embodiment, each of the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c may include a high-refractive-index oxide such as titanium dioxide (TiO2), zirconium dioxide (ZrO2), lithium niobate (LiNbO3), lithium tantalate (LiTaO3), or lanthanum titanate (LaTiO3).

[0121] In one embodiment, the substances included in the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c may be different.

[0122] In one embodiment, the thicknesses of the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c may be different. For example, the thickness of the first anti-reflection layer 360a may be the greatest. In another embodiment, the thickness of the second anti-reflection layer 360b may be the greatest. In yet another embodiment, the thickness of the third anti-reflection layer 360c may be the greatest.

[0123] In another embodiment, the thicknesses of the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c can be the same. In this case, the refractive indices of the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c can be different.

[0124] At least one of the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c may include multiple layers. According to one embodiment, the multiple layers may be a stacked structure. For example, the first anti-reflection layer 360a may include a first layer 361a and a second layer 362a disposed on the first layer 361a; the second anti-reflection layer 360b may include a third layer 361b and a fourth layer 362b disposed on the third layer 361b; and the third anti-reflection layer 360c may include a fifth layer 361c and a sixth layer 362c disposed on the fifth layer 361c. However, the present invention is not limited thereto.

[0125] The refractive indices of the multiple layers can be different. For example, the difference in refractive index at the interfaces of the multiple layers can be greater than 0.1.

[0126] A second substrate 200b may be disposed on the first anti-reflection layer 360a, the second anti-reflection layer 360b and the third anti-reflection layer 360c.

[0127] The first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c can contact the second substrate 200b. Specifically, the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c can contact the lower surface of the second substrate 200b.

[0128] In one embodiment, the first anti-reflection layer 360a, the second anti-reflection layer 360b, and the third anti-reflection layer 360c can be formed on the lower surface of the second substrate 200b in the form of a coating or a film by a chemical vapor deposition (CVD) process.

[0129] Although the above description has been made with reference to exemplary embodiments of the present invention, those skilled in the art should understand that various modifications and alterations can be made to the present invention without departing from the spirit and scope of the invention as set forth in the claims.

[0130] Industrial availability

[0131] This invention can be applied to display devices. For example, it can be applied to high-resolution smartphones, portable phones, smart pads, smartwatches, tablet computers, vehicle navigation systems, televisions, computer monitors, laptop computers, etc.

[0132] Although the above description has been made with reference to exemplary embodiments of the present invention, those skilled in the art should understand that various modifications and alterations can be made to the present invention without departing from the spirit and scope of the invention as set forth in the claims.

Claims

1. A display device, comprising: The first substrate includes a first region, a second region adjacent to the first region, and a third region adjacent to the second region; Multiple light-emitting layers are arranged on the first substrate; A first anti-reflection layer is disposed on the plurality of light-emitting layers to allow light of a first color to be transmitted. A second anti-reflection layer is disposed on the plurality of light-emitting layers, allowing light of a second color different from the first color and light of a third color different from both the first and second colors to be transmitted. as well as A second substrate is disposed on the first anti-reflection layer and the second anti-reflection layer. The plurality of light-emitting layers include: The first light-emitting layer emits red light and overlaps with the first region; A second light-emitting layer, emitting green light, overlaps with the second region; and The third luminescent layer emits blue light and overlaps with the third region. The first anti-reflection layer overlaps with the first region and is in contact with the second anti-reflection layer. The second anti-reflection layer overlaps with the first region, the second region and the third region, and is in contact with the second substrate.

2. The display device according to claim 1, characterized in that, The substance contained in the first anti-reflection layer is different from the substance contained in the second anti-reflection layer.

3. The display device according to claim 1, characterized in that, The thickness of the first anti-reflection layer is different from the thickness of the second anti-reflection layer.

4. The display device according to claim 1, characterized in that, The thickness of the first anti-reflection layer is the same as the thickness of the second anti-reflection layer.

5. The display device according to claim 1, characterized in that, At least one of the first anti-reflection layer and the second anti-reflection layer comprises multiple layers.

6. The display device according to claim 5, characterized in that, The multiple layers have different refractive indices.

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