Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel includes: a substrate having a first region in which first pixels are disposed and a second region in which second pixels and a light-transmitting region disposed between the second pixels are disposed; and a polarizing plate disposed over the light-transmitting region and including a light-transmitting pattern having a higher light transmittance than that of the remaining region, in which the substrate includes a high-transmission region having a higher light transmittance than that of the remaining region in a position corresponding to the second region.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 202110649571.8, filed on June 10, 2021, entitled "Display Panel and Display Device".

[0002] Cross-references to related applications

[0003] This application claims priority and benefit to Korean Patent Application No. 10-2020-0080180, filed on June 30, 2020, the entire disclosure of which is incorporated herein by reference. Technical Field

[0004] This disclosure relates to display panels and display devices including therewith. Background Technology

[0005] Image display devices that display various information on screens are a core technology of the information and communication era, and are being developed to be thinner, lighter, more portable, and have higher performance. Furthermore, the demand for display devices is increasing, and various types of display devices, such as liquid crystal displays, organic light-emitting diode displays, and quantum dot displays, are being utilized to meet these needs.

[0006] Furthermore, to provide users with a wider range of application functions, input devices such as touch sensors and optical devices such as cameras / proximity sensors are installed in display devices. However, because the optical devices are integrated into the display device, the design of the display device becomes more difficult. In particular, the camera and proximity sensor must be exposed to the outside for light incident and emitted, thus inevitably reducing the display area of ​​the display panel.

[0007] Therefore, in related technologies, display devices have been designed with the following features: a large bezel that allows the optical device to be mounted and exposed; a display panel that is cut into a notch shape; or a design where the optical device is exposed through a portion of the display panel in the form of an aperture. However, due to the limitations imposed by the camera on the screen size, full-screen display is difficult to achieve. Summary of the Invention

[0008] To achieve full-screen display, a method has been proposed that prepares an imaging area in which low-resolution pixels are set in the screen of a display panel, and positions a camera and / or various sensors below the display panel at a location relative to this imaging area. However, because the pixels are set in this imaging area, there are problems of reduced light transmittance and degraded performance of the camera and / or various sensors. Therefore, this disclosure aims to provide a structure for a display device capable of efficiently transmitting light toward an optical device. The purpose of this disclosure is not limited to the above-described purpose, and other purposes not described herein will be clearly understood by those skilled in the art from the following description.

[0009] According to one aspect of this disclosure, a display panel is disclosed. The display panel includes: a substrate having a first region in which a first pixel is disposed, and a second region in which a second pixel is disposed and a light-transmitting region is disposed between the second pixels; and a polarizing plate disposed above the light-transmitting region and including a light-transmitting pattern having a higher light transmittance than the remaining regions, wherein the substrate includes a high-transmittance region in a position corresponding to the second region, the high-transmittance region having a higher light transmittance than the remaining portions. The second region may overlap with a camera module, and the resolution of the second pixel disposed in the second region may be lower than the resolution of the first pixel disposed in the first region. The high-transmittance region may be positioned to correspond to the light-transmitting pattern.

[0010] The substrate may include a first substrate, a second substrate, and an inorganic film formed between the first substrate and the second substrate. The first pixel and the second pixel may be disposed on the second substrate, and the high-transmission region may include at least one of a first high-transmission region disposed in the first substrate and a second high-transmission region disposed in the second substrate.

[0011] The first high-transmittance region may be a region in which the first substrate is removed and filled with transparent resin, and the second high-transmittance region may be a region in which the second substrate is removed and filled with transparent organic material or transparent inorganic material. The transparent organic material or transparent inorganic material may be the same material as the layer included in the first pixel or the second pixel.

[0012] The second high-transmittance region can be positioned at a location corresponding to the light-transmitting region in the second region. Each of the first and second high-transmittance regions can have a tapered cross-section, and in a cross-sectional view, the side surface of the first high-transmittance region can be collinear with the side surface of the second high-transmittance region.

[0013] The polarizing plate may include a first protective layer, a second protective layer, and a polarizer disposed between the first and second protective layers, and a light-transmitting pattern may be formed in the polarizer. The light-transmitting pattern may include an opening formed in the polarizer. The first protective layer may include a protrusion inserted into the opening. The light-transmitting region may include a color-changing region formed in the polarizer, and the color-changing region may be a region in the polarizer where the iodine compound is decomposed.

[0014] The display panel may also include an anti-reflective layer disposed in the second region and configured to reduce the diffusion or reflection of incident light. The anti-reflective layer may be located on at least one of the upper part of the interlayer insulating layer, the lower part of the substrate, the upper part of the polarizer, and the lower part of the polarizer.

[0015] The first high-transmittance region may have a positively tapered cross section and the second high-transmittance region may have a negatively tapered cross section, or the first high-transmittance region may have a negatively tapered cross section and the second high-transmittance region may have a positively tapered cross section.

[0016] Other specific embodiments are included in the detailed description and accompanying drawings. Attached Figure Description

[0017] The above and other objects, features, and advantages of this disclosure will become more apparent to those skilled in the art from the exemplary embodiments described in detail with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a conceptual diagram of a display device according to one embodiment of the present disclosure;

[0019] Figure 2 This is a schematic cross-sectional view showing a display panel according to an embodiment of the present disclosure;

[0020] Figure 3 This is a view showing the pixel arrangement in a display area according to one embodiment of the present disclosure;

[0021] Figure 4 This is a view showing the pixels and light-transmitting area of ​​an imaging region according to one embodiment of the present disclosure;

[0022] Figure 5 yes Figure 4 A magnified view of part A;

[0023] Figure 6 This is a schematic diagram showing the structure of the display panel in the imaging area;

[0024] Figure 7 yes Figure 6 Example of modification;

[0025] Figure 8a and Figure 8b These are views showing various structures of a polarizing plate;

[0026] Figure 9 This is a graph showing the absorption spectrum of the polarizer;

[0027] Figure 10 This is a view illustrating the process of forming a first light-transmitting pattern on a polarizing plate according to one embodiment;

[0028] Figure 11 This is a diagram showing the absorption spectrum of a polarizing plate in which a first light-transmitting pattern is formed;

[0029] Figure 12 It is a plan view of the translucent pattern;

[0030] Figure 13 This is a view showing a polarizing plate according to another embodiment;

[0031] Figure 14 This is a cross-sectional view showing the cross-sectional structure of a pixel region in a display panel according to one embodiment of the present disclosure;

[0032] Figure 15 A cross-sectional structure of a pixel region and a light-transmitting region according to one embodiment of the present disclosure is shown;

[0033] Figure 16 yes Figure 15 First example of modification;

[0034] Figure 17 yes Figure 15 The second modified example; and

[0035] Figures 18 to 21 A cross-sectional structure of the display area and imaging area according to another embodiment of the present disclosure is shown. Detailed Implementation

[0036] The advantages and features of this disclosure, as well as the methods for implementing these advantages and features, should become clear from the following detailed description of the embodiments with reference to the accompanying drawings. However, this disclosure is not limited to the embodiments described below and can be embodied in various modifications. The embodiments are provided only to enable those skilled in the art to fully understand the scope of this disclosure, and this disclosure is limited only by the scope of the claims.

[0037] The figures, dimensions, ratios, angles, numbers, etc., disclosed in the accompanying drawings to describe embodiments of this disclosure are merely exemplary and not limited to what is shown in this disclosure. Throughout the disclosure, the same reference numerals refer to the same elements. Furthermore, in describing this disclosure, detailed descriptions of prior art will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the essential points of this disclosure. Unless terms such as “comprising,” “having,” and “consisting of” are used herein in conjunction with the term “only,” these terms are intended to allow for the addition of additional elements. Unless expressly stated otherwise, any reference to the singular may include the plural. Even without express statement, components are construed as including a general range of error.

[0038] To describe positional relationships, for example, when the positional relationship between two parts is described as "above," "on top," "below," "near," etc., one or more parts may be inserted between the two parts unless the terms "closely" or "directly" are used in the expression. When an element or layer is disposed "on" another element or layer, the element is disposed directly on the other element or layer, or is disposed on the other element or layer (with other elements between the element and the other element or layer). It should be noted that when a component is described as "connected," "coupled," or "joined" to another component, even if the one component can be directly "connected," "coupled," or "joined" to the other component, another component can also be "connected," "coupled," or "joined" between the two components.

[0039] Although the terms "first," "second," etc., may be used herein to describe various components, the components are not limited by the terms. The terms are used only to distinguish one component from another. Therefore, within the technical scope of this disclosure, the first component described below may be the second component.

[0040] For ease of description, the dimensions and thicknesses of each construction shown in the accompanying drawings are illustrated, and this disclosure is not necessarily limited to the dimensions and thicknesses of the constructions shown.

[0041] In the following, various embodiments of this disclosure will be described in detail with reference to the accompanying drawings.

[0042] Figure 1 This is a conceptual diagram of a display device according to one embodiment of the present disclosure. Figure 2 This is a schematic cross-sectional view illustrating a display panel according to an embodiment of the present disclosure, and Figure 3 This is a view showing the pixel arrangement in a display area according to one embodiment of the present disclosure.

[0043] Reference Figure 1The front surface of the display panel 100 can be configured as a display area. The display area may include a first area DA and a second area CA. Both the first area DA and the second area CA can output images, but their resolutions may differ. For example, the resolution of a plurality of second pixels set in the second area CA may be lower than the resolution of a plurality of first pixels set in the first area DA. A sufficient amount of light can be injected into the sensors 41 and 42 set in the second area CA, the injection amount being as much as the reduction in resolution of the plurality of second pixels set in the second area CA. However, this disclosure is not limited thereto, and the resolution of the first area DA and the second area CA can be the same as long as the second area CA can have sufficient light transmittance or a suitable noise compensation algorithm can be implemented.

[0044] The second region CA can be the region where sensors 41 and 42 are disposed. The second region CA overlaps with various sensors, therefore the area of ​​the second region CA can be smaller than the area of ​​the first region DA, which outputs most of the image. Sensors 41 and 42 can include at least one of an image sensor, a proximity sensor, an illumination sensor, a gesture sensor, a motion sensor, a fingerprint sensor, and a biometric sensor. As an example, the first sensor 41 can be an illumination sensor, and the second sensor 42 can be an image sensor configured to capture images or videos, but this disclosure is not limited thereto.

[0045] The second region CA can be positioned where light needs to be incident. For example, the second region CA can be positioned on the upper left or upper right side of the display area, or it can be positioned entirely at the top of the display area. The width of the second region CA can be modified in various ways. However, this disclosure is not limited to this, and the second region CA can be positioned in the central part of the display area or at the bottom of the display area. In the following description, the first region DA can be described as the display area, and the second region CA can be described as the imaging area.

[0046] Reference Figure 2 and Figure 3 The display area DA and the imaging area CA may include a pixel array in which pixels for writing pixel data can be set. To ensure the light transmittance of the imaging area CA, the number of pixels per unit area of ​​the imaging area CA (pixels per inch (PPI)) can be less than the PPI of the display area DA.

[0047] The pixel array of the display area DA may include a pixel region (first pixel region) in which multiple pixels with high PPI are disposed. The pixel array of the imaging area CA may include a pixel region (second pixel region) in which multiple groups of pixels with relatively low PPI are disposed and spaced apart from each other by light-transmitting regions. In the imaging area CA, external light can be transmitted through the display panel 100 through the light-transmitting regions with high light transmittance and can be received by a sensor placed below the display panel 100.

[0048] Since both the display area DA and the imaging area CA include pixels, the input image can be reproduced on both the display area DA and the imaging area CA.

[0049] Each pixel in the display area DA and the imaging area CA may include subpixels of different colors to achieve the color of the image. Subpixels may include red subpixels (hereinafter referred to as "R subpixels"), green subpixels (hereinafter referred to as "G subpixels"), and blue subpixels (hereinafter referred to as "B subpixels"). Although not shown in the accompanying drawings, each pixel may also include white subpixels (hereinafter referred to as "W subpixels"). Each subpixel may include pixel circuitry and a light-emitting element (organic light-emitting diode: OLED).

[0050] The imaging area CA may include pixels and a camera module disposed below the screen of the display panel 100. The pixels of the imaging area CA can display the input image by writing pixel data of the input image in display mode.

[0051] The camera module can capture external images in image capture mode to output picture or video image data. The lens of the camera module can face the imaging area CA. External light is incident on the lens 30 of the camera module through the imaging area CA, and the lens 30 can focus the light onto the image sensor (not shown in the attached figure). The camera module can capture external images in image capture mode to output picture or video image data.

[0052] To ensure light transmittance, since pixels are removed from the imaging region CA, an image quality compensation algorithm can be applied to compensate for the brightness and color coordinates of the pixels in the imaging region CA.

[0053] In embodiments of this disclosure, low-resolution pixels can be set within the imaging area CA. Therefore, the display area of ​​the screen is not limited by the camera module, thus enabling full-screen display.

[0054] Reference Figure 3The display area DA can include pixels PIX1 and PIX2 arranged in a matrix. Each of pixels PIX1 and PIX2 can be implemented as a real-type pixel where R, G, and B sub-pixels of the three primary colors form a pixel. Each of pixels PIX1 and PIX2 can also include W sub-pixels (omitted in the accompanying drawings). Furthermore, two sub-pixels can be combined into a single pixel using a sub-pixel rendering algorithm. For example, the first pixel PIX1 can include R and G sub-pixels, and the second pixel PIX2 can include B and G sub-pixels. Insufficient color representation in each pixel of pixels PIX1 and PIX2 can be compensated for by averaging the corresponding color data between adjacent pixels.

[0055] Figure 4 This is a view showing the pixels and light-transmitting area of ​​an imaging region according to one embodiment of the present disclosure, and Figure 5 yes Figure 4 A magnified view of part A.

[0056] Reference Figure 4 and Figure 5 Multiple light-transmitting regions AG can be set between multiple second pixels. Specifically, the imaging region CA may include pixel groups PG spaced apart from each other by a predetermined distance D1, and light-transmitting regions AG, each set between adjacent pixel groups PG. External light can be received by the lens of the camera module through the light-transmitting regions AG. Pixel groups PG can be set to be spaced apart from each other in the pixel region.

[0057] The light-transmitting region AG can include a transparent medium with high light transmittance without metal, allowing light to enter with minimal loss. The light-transmitting region AG can be made of a transparent insulating material and does not include metal lines or pixels. As the light-transmitting region AG increases, the light transmittance of the imaging region CA can also increase.

[0058] Each pixel group in a pixel group PG may include one or two pixels. Each pixel in a pixel group may include two to four sub-pixels. For example, the first pixel in a pixel group may include an R sub-pixel, a G sub-pixel, and a B sub-pixel, or two sub-pixels, and may also include a W sub-pixel.

[0059] The distance D3 between the light-transmitting areas AG can be smaller than the spacing D1 between pixel groups PG. The spacing D2 between sub-pixels can be smaller than the spacing D1 between pixel groups PG.

[0060] The shape of the light-transmitting area AG is shown as circular, but this disclosure is not limited to this. For example, the light-transmitting area AG can be designed in various shapes, such as circular, elliptical, polygonal, etc.

[0061] All metal electrode material can be removed from the light-transmitting region AG. Therefore, the pixel line TS can be positioned outside the light-transmitting region AG. Thus, light can effectively pass through the light-transmitting region. However, this disclosure is not limited to this, and the metal electrode material can be retained within a portion of the light-transmitting region AG.

[0062] Figure 6 This is a schematic diagram showing the structure of the display panel in the imaging area, and Figure 7 yes Figure 6 Example of modification.

[0063] Reference Figure 6 The display panel may include a circuit layer 12 disposed on the substrate 10 and a light-emitting element layer 14 disposed on the circuit layer 12. A polarizer 18 may be disposed on the light-emitting element layer 14, and a cover glass 20 may be disposed on the polarizer 18.

[0064] The display panel 100 has a width in the X-axis direction, a length in the Y-axis direction, and a thickness in the Z-axis direction. The display panel 100 may include a circuit layer 12 disposed on a substrate 10 and a light-emitting element layer 14 disposed on the circuit layer 12. A polarizer 18 may be disposed on the light-emitting element layer 14, and a cover glass 20 may be disposed on the polarizer 18.

[0065] Circuit layer 12 may include pixel circuitry connected to lines such as data lines, gate lines, power lines, etc., and gate driving units connected to the gate lines. Circuit layer 12 may include circuit elements such as transistors implemented as thin-film transistors (TFTs), capacitors, etc. The lines and circuit elements of circuit layer 12 may be implemented through multiple insulating layers, two or more spaced-apart metal layers having insulating layers therebetween, and an active layer comprising semiconductor material.

[0066] The light-emitting element layer 14 may include light-emitting elements driven by pixel circuitry. The light-emitting element may be implemented as an OLED. The OLED may include an organic compound layer formed between the anode and cathode. The organic compound layer may include a hole injection layer (HIL), a hole transport layer (HTL), a light-emitting layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL), but this disclosure is not limited thereto. When a voltage is applied to the anode and cathode of the OLED, holes passing through the hole transport layer (HTL) and electrons passing through the electron transport layer (ETL) move to the light-emitting layer (EML) to generate excitons, and thus, visible light is emitted from the light-emitting layer (EML). The light-emitting element layer 14 may also include a color filter array disposed on the pixel, which may selectively transmit red, green, and blue wavelengths.

[0067] The light-emitting element layer 14 can be covered by a protective film, and the protective film can be covered by an encapsulation layer. The protective film and encapsulation layer can have a structure in which organic and inorganic films are alternately stacked. The inorganic film can block the penetration of moisture or oxygen. The organic film can planarize the surface of the inorganic film. When organic and inorganic films are stacked into multiple layers, the penetration of moisture / oxygen affecting the light-emitting element layer 14 can be effectively blocked because the movement path of moisture or oxygen is increased in length compared to a single layer.

[0068] The polarizer 18 can be adhered to the encapsulation layer. The polarizer 18 can improve the outdoor visibility of the display device. The polarizer 18 can reduce light reflection from the surface of the display panel 100 and block light reflected from the metal of the circuit layer 12, thereby improving pixel brightness. The polarizer 18 can be implemented as a polarizer 18 to which a linear polarizer and a phase retardation film are bonded, or it can be implemented as a circular polarizer 18.

[0069] In the polarizer 18, a light-transmitting pattern 18d can be formed in the region corresponding to the light-transmitting region AG. Based on green light with a wavelength of 555 nm, the transmittance of the substrate made of PI is approximately 70% to 80%, and the transmittance of the cathode is approximately 80% to 90%. On the other hand, the transmittance of the polarizer 18 is relatively very low, as low as 40%. Therefore, in order to effectively increase the transmittance in the light-transmitting region, it is necessary to increase the transmittance of the polarizer 18.

[0070] The polarizer 18 according to the embodiment has a light-transmitting pattern 18d formed above the light-transmitting region AG to improve light transmittance. The light transmittance of the region where the light-transmitting pattern 18d is formed can be higher than that of the rest of the polarizer. In addition, the light transmittance of the region where the light-transmitting pattern is formed may be the highest in the polarizer. Therefore, the amount of light introduced into the camera module in the light-transmitting region is increased, thereby improving camera performance.

[0071] The light-transmitting pattern 18d of the polarizer 18 can be formed by removing a portion of the polarizer 18, or by decomposing the compound constituting the polarizer 18. In other words, the light-transmitting pattern 18d can have various structures that can increase the light transmittance of a conventional polarizer 18.

[0072] Reference Figure 7 In the light-transmitting region AG, the polarizer 18 may have a first light-transmitting pattern 18d, and the cathode CAT may have a second light-transmitting pattern. The second light-transmitting pattern may be an opening H1 formed in the light-transmitting region. Since the transmittance of the cathode is 80% to 90%, the transmittance of the light-transmitting region AG may be further increased due to the opening H1.

[0073] The method for forming the opening H1 in the cathode CAT is not particularly limited. As an example, after the cathode is formed, the opening H1 can be formed in the cathode using an etching process, or the cathode can be removed at the lower part of the substrate 10 using an infrared (IR) laser.

[0074] A planarization layer (PCL) can be formed on the cathode (CAT), and a touch sensor (TOE) can be placed on the PCL. Here, in the light-transmitting area (AG), the sensing electrodes and lines of the touch sensor can be made of a transparent material such as indium tin oxide (ITO) or a metal mesh, thereby increasing light transmittance.

[0075] Figure 8a and Figure 8b These are views showing various structures of polarizing plates, and Figure 9 This is a graph showing the absorption spectrum of the polarizer.

[0076] The polarizer 18 may include a first protective layer 18a, a second protective layer 18c, and a polarizer 18b disposed between the first protective layer 18a and the second protective layer 18c.

[0077] Polarizer 18b may include a dichroic material. The dichroic material may include at least one of iodine and an organic dye. The organic dye may include azo-based pigments, stilbene-based pigments, pyrazolone-based pigments, triphenylmethane-based pigments, quinoline-based pigments, oxazine-based pigments, thiazine-based pigments, anthraquinone-based pigments, etc., but this disclosure is not limited thereto.

[0078] Polarizer 18b has a transmission axis in the direction perpendicular to the stretching direction. Iodine molecules and dye molecules exhibit dichroism, and therefore polarizer 18b can absorb light vibrating in the stretching direction and transmit light vibrating in the direction perpendicular to the stretching direction.

[0079] Polarizer 18b may have relatively weak mechanical strength relative to the transmission axis. Additionally, polarizer 18b may shrink or weaken its polarization function due to heat or moisture. The first protective layer 18a and the second protective layer 18c are configured to protect polarizer 18b without altering the characteristics of the light transmitted through it, and can be formed using, for example, triacetyl cellulose (TAC). TAC has high transmittance and relatively low birefringence and is easily hydrophilicated through surface modification; therefore, TAC can be easily stacked on polarizer 18b.

[0080] Reference Figure 8bThe polarizer 18 may also include various functional layers 18d, 18e, 18f, and 18g disposed on the upper and lower portions of the polarizer 18b. As an example, the functional layers 18d, 18e, 18f, and 18g may include a pressure-sensitive adhesive (PSA), a quarter-wave plate (QWP), and a hard coating (HC). However, most layers constituting the polarizer 18 have relatively high transmittance compared to the polarizer 18b. Therefore, to increase the transmittance of the light-transmitting region AG, it is crucial to control the transmittance of the polarizer 18b.

[0081] Reference Figure 9 The polarizer 18b of the polarizer 18 is formed of iodine compounds, with the first iodine compound (I2) having a maximum absorption peak at approximately 450 nm and the second iodine compound (KI5) having a maximum absorption peak at approximately 610 nm. In the absorption spectrum of the polarizer 18b, the first iodine compound (I2) and the second iodine compound (KI5) have relatively high absorption peaks, thus requiring a reduction in their absorption peaks.

[0082] Figure 10 This is a view illustrating the process of forming a first light-transmitting pattern on a polarizing plate according to one embodiment. Figure 11 This is a graph showing the absorption spectrum of a polarizing plate with a first light-transmitting pattern formed on it. Figure 12 It is a plan view of the first light-transmitting pattern, and Figure 13 This is a view showing a structure in which a first light-transmitting pattern is formed on a polarizing plate according to another embodiment.

[0083] like Figure 10 As shown, when an iodine compound is irradiated with a laser in a wavelength range with high absorption, the iodine compound can be decomposed and a first transparent pattern 18d can be formed. That is, the bonds between iodine molecules are broken, and the separated iodine molecules are sublimated, thus the first transparent pattern 18d can be formed by decolorization.

[0084] As an example, when irradiated with a first laser LB having a wavelength of 532 nm, the first iodine compound (I2) and the second iodine compound (KI5) can be decomposed by absorbing the first laser. The laser irradiation device 101 can emit the first laser while moving through multiple light-transmitting areas to form a first light-transmitting pattern 18d on each light-transmitting area.

[0085] Using this structure, a single-wavelength laser can be irradiated to simultaneously decompose the first iodine compound (I2) and the second iodine compound (KI5), thereby increasing the operating speed. Since there are numerous light-transmitting areas in the imaging region, it is necessary to form a large number of first light-transmitting patterns.

[0086] Reference Figure 11As can be seen, the light absorption peaks of the first and second iodine compounds become very low in terms of the light absorption coefficient Ac.

[0087] However, this disclosure is not limited thereto, and when irradiated with a second laser having a wavelength of 450 nm, the first iodine compound (I2) can be decomposed by absorbing most of the laser light. Furthermore, when irradiated with a third laser having a wavelength of 610 nm, the second iodine compound (KI5) can be decomposed by absorbing most of the laser light. Irradiation with the second and third lasers can be repeated multiple times.

[0088] Table 1 below shows the results of measuring the transmittance of the polarizer before and after the formation of the first transmittance pattern 18d, within the blue, green, and red wavelength ranges. A Hazemeter (JCH-300S) from J&C Tech was used as the measuring device.

[0089] The measurement results show that the transmittance increased by 8% in the blue wavelength range and by 15% in the green wavelength range. Additionally, the transmittance increased by 16% in the red wavelength region. Therefore, it can be confirmed that the transmittance of the polarizer 18 is improved due to the first transmittance pattern 18d. On the other hand, it can be confirmed that the transmittance remains almost unchanged in the IR range.

[0090] [Table 1]

[0091]

[0092] In this scenario, by adjusting the wavelength range of the irradiating laser, the transmittance across the blue, green, and red wavelength ranges can be made uniform. When the blue transmittance is relatively lower than that of the green and red wavelengths, the laser light in the blue wavelength range can be further irradiated onto the polarizer. As a result, the iodine compound that absorbs light within the corresponding wavelength range is partially decomposed to increase the blue light transmittance. Therefore, color uniformity can be improved. (Refer to...) Figure 12 The size of the first light-transmitting pattern 18d of the polarizer 18 can correspond to the size of the light-transmitting region AG. As an example, the size (width, length, or diameter) of each of the first light-transmitting pattern 18d and the light-transmitting region AG can be in the range of 5 μm to 200 μm. When the size of the first light-transmitting pattern is less than 5 μm, the effect of improving light transmittance may not be significant. When the size of the first light-transmitting pattern is greater than 200 μm, there is a problem that the first light-transmitting pattern can be observed from the outside.

[0093] The shape of the first light-transmitting pattern 18d is not specifically limited. As an example, the first light-transmitting pattern 18d can have a rectangular shape or a circular shape. In addition, the first light-transmitting pattern 18d can have various shapes. That is to say, the shape of the first light-transmitting pattern 18d can be the same as the shape of the light-transmitting area AG.

[0094] Reference Figure 13 The first light-transmitting pattern 18d of the polarizer 18 may include multiple openings. That is, the first light-transmitting pattern 18d can also be formed by partially removing the polarizer 18b. The method of partially removing the polarizer 18b is not specifically limited. As an example, a semiconductor etching process and a laser etching process can be used to partially remove the polarizer 18b.

[0095] For example, in polarizer 18b, a polyvinyl alcohol (PVA) based resin film can be stretched, and the resin film can be immersed in iodine and organic dye to arrange iodine molecules and dye molecules in the stretching direction.

[0096] The first light-transmitting pattern 18d can be formed by creating multiple openings in the polarizer 18b, which has already undergone the stretching process. During the formation of the second protective layer 18c on the polarizer 18b, a portion of the second protective layer 18c can be inserted into the multiple first light-transmitting patterns 18d to form protrusions 18c-1.

[0097] Figure 14 This is a cross-sectional view showing in detail the cross-sectional structure of a pixel region in a display panel according to one embodiment of the present disclosure, and Figure 15 A cross-sectional structure of a pixel region and a light-transmitting region according to one embodiment of the present disclosure is shown.

[0098] The cross-sectional structure of the display panel 100 is not limited to Figure 14 The cross-sectional structure within. In Figure 14 In this context, "TFT" represents the driving element DT of the pixel circuit.

[0099] Reference Figure 14 Circuit layers, light-emitting element layers, etc., can be stacked on substrates PI1 and PI2 in the pixel region PIX. Substrates PI1 and PI2 can include a first PI substrate PI1 and a second PI substrate PI2. An inorganic film IPD can be formed between the first PI substrate PI1 and the second PI substrate PI2. The inorganic film IPD can prevent moisture penetration.

[0100] A first buffer layer BUF1 can be formed on a second PI substrate PI2. A first metal layer can be formed on the first buffer layer BUF1, and a second buffer layer BUF2 can be formed on the first metal layer.

[0101] The first metal layer can be patterned using photolithography. The first metal layer may include a light-shielding pattern (BSM). The light-shielding pattern (BSM) can block external light, preventing light from reaching the active layer of the TFT, thereby preventing the generation of photocurrent in the TFT formed in the pixel region.

[0102] When the light-shielding pattern BSM is formed of a metal, the light-shielding pattern BSM can also be used as a light-shielding layer LS configured to block the laser beam LB in a laser ablation process, the metal having a low absorption coefficient for the laser wavelength used in the laser ablation process compared to the metal layer (e.g., cathode) to be removed from the imaging region CA.

[0103] Each of the first buffer layer BUF1 and the second buffer layer BUF2 may be made of inorganic insulating material and may be formed by one or more insulating layers.

[0104] The active layer ACT can be made of semiconductor material deposited on the second buffer layer BUF2 and can be patterned using photolithography. The active layer ACT can include active patterns for each of the TFTs in the pixel circuit and active patterns for each of the TFTs in the gate driving unit. A portion of the active layer ACT can be metallized by ion doping. The metallized portion can be used as a jumper pattern, which connects the metal layer at some nodes of the pixel circuit to connect components of the pixel circuit.

[0105] The gate insulating layer GI can be formed on the second buffer layer BUF2 to cover the active layer ACT. The gate insulating layer GI can be made of an inorganic insulating material.

[0106] The second metal layer can be formed on the gate insulating layer GI. The second metal layer can be patterned using a photolithography process. The second metal layer may include gate lines, gate electrode patterns GATE, the lower electrode of the storage capacitor Cst1, and bridging patterns connecting the patterns of the first metal layer and the third metal layer, etc.

[0107] A first interlayer insulating layer ILD1 can be formed on the gate insulating layer GI to cover the second metal layer. A third metal layer can be formed on the first interlayer insulating layer ILD1, and a second interlayer insulating layer ILD2 can cover the third metal layer. The third metal layer can be patterned using a photolithography process. The third metal layer can include a metal pattern TM, such as the upper electrode of a storage capacitor Cst1. Both the first interlayer insulating layer ILD1 and the second interlayer insulating layer ILD2 can each include an inorganic insulating material.

[0108] A fourth metal layer can be formed on the second interlayer insulating layer ILD2, and an inorganic insulating layer PAS1 and a first planarization layer PLN1 can be stacked on the fourth metal layer. A fifth metal layer can be formed on the first planarization layer PLN1.

[0109] Some patterns of the fourth metal layer can be connected to the third metal layer through contact holes passing through the first planarization layer PLN1 and the inorganic insulating layer PAS1. The first planarization layer PLN1 and the second planarization layer PLN2 can each be made of an organic insulating material that makes its surface planar.

[0110] The fourth metal layer may include a first electrode and a second electrode of the TFT, which are connected to the active pattern of the TFT through contact holes passing through the second interlayer insulating layer ILD2. Data lines DL and power lines PL1, PL2, and PL3 can be implemented using either the pattern SD1 of the fourth metal layer or the pattern SD2 of the fifth metal layer.

[0111] An anode AND, serving as the first electrode layer for an OLED (Light Emitting Device), can be formed on the second planarization layer PLN2. The anode AND can be connected to the electrodes of a TFT (Thin-Film Transistor) used as a switching or driving element via contact holes through the second planarization layer PLN2. The anode AND can be made of a transparent or translucent electrode material.

[0112] Pixel-defining films (BNKs) can cover the anode and AND of an OLED light-emitting element. The BNK can be patterned to define light-emitting regions (or opening regions) through which light travels from each pixel to the outside. Spacer films (SPCs) can be formed on the BNK. The BNK and SPC can be integrated using the same organic insulating material. The SPC ensures a gap between the fine metal mask (FMM) and the anode and AND, preventing the FMM from contacting the anode and AND during the deposition of the organic compound EL.

[0113] An organic compound EL can be formed in the light-emitting region defined by the pixel-defining film BNK in each pixel. The cathode CAT, serving as the second electrode layer of the OLED light-emitting element, can be formed on the entire surface of the display panel 100 to cover the pixel-defining film BNK, the spacer SPC, and the organic compound EL. The cathode CAT can be connected to a VSS line PL3 formed by any of the underlying metal layers. A capping layer CPL can cover the cathode CAT. The capping layer CPL can be made of an inorganic insulating material to prevent air penetration and out-gassing of the organic insulating material applied to the capping layer CPL, thus protecting the cathode CAT. An inorganic insulating layer PAS2 can cover the capping layer CPL, and a planarization layer PCL can be formed on the inorganic insulating layer PAS2. The planarization layer PCL may include an organic insulating material. An inorganic insulating layer PAS3 of the encapsulation layer can be formed on the planarization layer PCL.

[0114] Polarizing plate 18 can be disposed on inorganic insulating layer PAS3 to improve outdoor visibility of display device. Polarizing plate 18 can reduce light reflected from the surface of display panel 100 and block light reflected from metal of circuit layer 12, thereby improving pixel brightness.

[0115] Reference Figure 15 In the light-transmitting region AG, a first light-transmitting pattern 18d can be formed in the polarizer 18. The first light-transmitting pattern 18d can be formed by using a laser to change the color of the polarizer 18b, or the first light-transmitting pattern 18d can be formed by partially removing the polarizer 18b.

[0116] An opening H1 can be formed in the cathode CAT within the light-transmitting region AG. The opening H1 can be formed by forming the cathode CAT on the pixel-defining film BNK and then etching both the cathode CAT and the pixel-defining film BNK in one step. Therefore, a first groove RC1 can be formed in the pixel-defining film BNK, and the opening H1 of the cathode CAT can be formed on the first groove RC1. However, this disclosure is not limited to this, and the cathode CAT can be disposed on the second planarization layer PLN2 without forming the pixel-defining film on the light-transmitting region AG.

[0117] According to the embodiment, a first light-transmitting pattern 18d is formed in the polarizer 18 and an opening H1 is formed in the cathode in the light-transmitting region AG, thereby improving light transmittance. Therefore, a sufficient amount of light can be introduced into the camera module 400, thereby improving camera performance. Additionally, noise in the image data can be reduced.

[0118] Figure 16 yes Figure 15 The first modified example, and Figure 17 yes Figure 15The second modified example.

[0119] Reference Figure 16 A second groove RC2, passing through a buffer layer of the circuit layer and at least one of a plurality of insulating layers, can be formed in the light-transmitting region AG. Additionally, the first planarization layer PLN1 may include a protrusion inserted into the second groove RC2. Using this configuration, the interfaces of multiple layers can be omitted, thereby increasing the light transmittance of the light-transmitting region AG.

[0120] Reference Figure 17 The third groove RC3 can be formed in the first surface (upper surface) of substrates PI1 and PI2 on which multiple insulating layers are formed, and the third groove RC3 can be connected to the second groove RC2. That is, during the process of forming the second groove RC2 after the formation of inorganic insulating films ILD2 and PAS1, the groove can be formed to the second PI substrate PI2. Alternatively, the groove can also be formed to a portion of the second PI substrate PI2 by means of an inorganic film IPD as needed.

[0121] Figures 18 to 21 A cross-sectional structure of the display area and imaging area according to another embodiment of the present disclosure is shown.

[0122] Even in the case of improving Figures 15 to 17 In the structure of transmittance in the imaging region CA described above, there is also a situation where it is difficult to ensure the image quality of the camera due to the low transmittance of the substrates PI1 and PI2 themselves. In particular, when colored polyimide (PI) is used as the substrate, this problem frequently occurs due to the low transmittance of blue light. On the other hand, when transparent polyimide is used as the substrate, the transmittance is improved, but there are durability issues, making it difficult to apply transparent polyimide to mass production processes. Therefore, the inventors have designed a substrate structure that does not have transmittance problems while using colored polyimide (e.g., yellow PI), which is more suitable for this process. The above structure can be achieved by providing a high-transmittance region with higher transmittance than the rest at the position corresponding to the second region CA. Figures 15 to 17 When using a double-layer polyimide substrate, a high-transmittance region can be formed in the first PI substrate PI1 and / or the second PI substrate PI2. In this case, the high-transmittance region can be configured to correspond to all or part of the imaging region CA. The high-transmittance region can be formed by removing a portion of the substrate of the imaging region CA and filling the removed space with a material having high transmittance. The filling material can be selected from materials that have high blue light transmittance and maintain color balance with other regions.

[0123] Figures 18 to 21The display panel shown may include: a substrate having a first region DA and a second region CA, a first pixel being disposed in the first region DA, a second pixel being disposed in the second region CA, and a light-transmitting region AG disposed between the second pixels; and a polarizing plate 18 having a light-transmitting pattern 18d disposed above the light-transmitting region AG and having a higher light transmittance than the remaining regions. The second region CA may overlap with the camera module 400, and the resolution of the second pixel disposed in the second region CA may be lower than the resolution of the first pixel disposed in the first region DA.

[0124] The substrate may include a first substrate PI1, a second substrate PI2, and an inorganic film IPD disposed between the first substrate PI1 and the second substrate PI2. In this case, the first pixel and the second pixel are disposed on the second substrate PI2. The high-transmittance region may include at least one of a first high-transmittance region disposed in the first substrate PI1 and a second high-transmittance region disposed in the second substrate PI2.

[0125] The high-transmittance region disposed in the substrate can be positioned to correspond to the light-transmitting pattern 18d of the polarizer 18. In this case, the high-transmittance region can be formed to have substantially the same shape and area as the light-transmitting pattern 18d, but is not limited thereto, and can be implemented with different shapes and different areas as needed. The polarizer 18 may include a first protective layer, a second protective layer, and a polarizer 18b disposed between the first protective layer and the second protective layer, and the light-transmitting pattern 18d may be formed in the polarizer 18b. The light-transmitting pattern 18d may include an opening formed in the polarizer 18b, and here, the first protective layer may include a protrusion inserted into the opening. The light-transmitting region may include a color-changing region formed in the polarizer 18b, and the color-changing region may be a region in which the iodine compound of the polarizer 18b is decomposed.

[0126] Figure 18 A first high-transmittance region 1810 is shown disposed in the first substrate PI1. Figure 18 In one embodiment, the first high-transmittance region 1810 may be the region in which the first substrate PI1 is removed and filled with transparent resin. The first high-transmittance region 1810 may be formed by the following processes: separating substrates PI1 and PI2 from a mother substrate; trimming a specific area of ​​the first substrate PI1; and filling the space in which the first substrate was removed during the trimming process with transparent resin.

[0127] Figure 19a and Figure 19bThe diagram illustrates first high-transmittance regions 1910a and 1910b disposed in a first substrate PI1 and second high-transmittance regions 1920a and 1920b disposed in a second substrate PI2. The first high-transmittance regions 1910a and 1910b can be coupled with… Figure 18 The first high-transmittance region 1810 is configured in the same manner. The second high-transmittance regions 1920a and 1920b may be regions in which the second substrate PI2 is removed and filled with transparent organic material or transparent inorganic material.

[0128] The second high-transmittance regions 1920a and 1920b can be formed by etching specific areas of the second substrate PI2 and filling the trimmed spaces with organic and / or inorganic films. The organic or inorganic material can be the same material as the material of the first buffer layer BUF1, the second buffer layer BUF2, the gate insulating layer GI, the first interlayer insulating layer ILD1, the second interlayer insulating layer ILD2, the first planarization layer PLN1, the second planarization layer PLN2, etc., which are layers constituting the first pixel or the second pixel, or it can be a separate material.

[0129] The first high-transmittance regions 1910a and 1910b and the second high-transmittance regions 1920a and 1920b can each have a tapered cross-section. In this case, as... Figure 19a As shown, the cross-sections of the first high-transmittance region 1910a and the second high-transmittance region 1920a can have shapes opposite to each other in opposite directions. That is, the first high-transmittance region 1910a can have a forward-reducing shape, while the second high-transmittance region 1920a can have a reverse-reducing shape, and vice versa. Alternatively, as Figure 19b As shown, the first high-transmittance region 1910b and the second high-transmittance region 1920b can have the same cross-sectional shape. That is, both the first high-transmittance region 1910b and the second high-transmittance region 1920b can have a reverse-reduction shape or a forward-reduction shape. In particular, here, in the case of... Figure 19b In the cross-sectional view shown, the side of the first high-transmittance region 1910b can be collinear with the side of the second high-transmittance region 1920b. This shape can be formed by etching all of the first high-transmittance region 1910b and the second high-transmittance region 1920b at once, and then sequentially filling the etched space with the first high-transmittance region filling material, the inorganic film IPD, and the second high-transmittance region filling material.

[0130] Figure 20A first high-transmittance region 2010 disposed in a first substrate PI1 and a second high-transmittance region 2020 disposed in a second substrate PI2 are shown. The second high-transmittance region 2020 can be disposed in a second region CA at a position corresponding to the light-transmitting region AG. That is, multiple second high-transmittance regions 2020 can be disposed in the second region CA.

[0131] Figure 21 An embodiment is shown that also includes anti-reflective layers AR1, AR2, AR3, and AR4 disposed in a second region CA. The anti-reflective layers AR1, AR2, AR3, and AR4 are disposed to allow external light to easily enter the interior of the panel and reduce ghost images caused by reflections of light from the panel. The anti-reflective layers AR1, AR2, AR3, and AR4 can reduce interface reflections of the panel. Furthermore, the anti-reflective layers AR1, AR2, AR3, and AR4 can selectively transmit / reflect light in the visible range to reduce haze and / or diffuse light.

[0132] Antireflective layers AR1, AR2, AR3, and AR4 can selectively direct light incident at a specific angle toward camera module 400. Haze can be calculated using DT / TT (where DT: diffuse transmittance, and TT: total transmittance), meaning that a significant amount of haze exists when diffuse (or scattered) light is incident on the camera. Therefore, as an implementation to reduce the DT component, antireflective layers AR1, AR2, AR3, and AR4 can be designed to transmit light incident at an angle difference of 10° or less relative to direct light in the wavelength range of 380 nm to 780 nm, and reflect light incident at an angle difference of 10° or greater.

[0133] An antireflective layer may be disposed on at least one of the following: the upper AR1 of the polarizer 18, the lower AR2 of the polarizer 18, the upper AR3 of the interlayer insulating layers ILD1 and ILD2, and the lower AR4 of the substrate. The antireflective layers AR1, AR2, AR3, and AR4 may be selectively patterned only at locations overlapping with the first high-transmittance region 2110 and / or the second high-transmittance region 2120. The antireflective layers AR1, AR2, AR3, and AR4 may be made of any one or more of MgF2, CeF2, ZrO2, SiO2, TiO2, and Al2O3.

[0134] Embodiments of this disclosure can provide a display device that incorporates optical elements without compromising the display area. More specifically, embodiments of this disclosure can increase light transmittance in the imaging area. Therefore, in embodiments of this disclosure, noise in the captured image data can be reduced, thereby improving camera performance. Consequently, the display device according to embodiments of this disclosure can improve both aesthetics and functionality. The effects of embodiments of this disclosure are not limited to those illustrated above, and many more effects are included in this specification.

[0135] Although embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, the present disclosure is not limited to these embodiments, and various changes and modifications can be made without departing from the technical spirit of the present disclosure. Therefore, the embodiments disclosed herein should be considered descriptive rather than limiting of the technical spirit of the present disclosure, and the scope of the technical spirit of the present disclosure is not limited by these embodiments. Features of the various embodiments of the present disclosure may be joined or combined with each other in part or in whole and may be technically interlocked and operated in various ways by those skilled in the art, and exemplary embodiments may be performed independently or in relation to each other.

[0136] The scope of this disclosure shall be interpreted as the full scope of the appended claims and the equivalents thereof.

[0137] Postscript

[0138] This disclosure includes, but is not limited to, the following schemes.

[0139] 1. A display panel, comprising:

[0140] A substrate having a first region and a second region, a first pixel being disposed in the first region, a second pixel being disposed in the second region, and a light-transmitting region being disposed between the second pixels; and

[0141] A polarizing plate, disposed above the light-transmitting area and comprising a light-transmitting pattern, wherein the light-transmitting pattern has a higher light transmittance than the remaining areas.

[0142] The substrate includes a high-transmittance region at a position corresponding to the second region, and the high-transmittance region has a higher transmittance than the rest of the substrate.

[0143] 2. The display panel according to Scheme 1, wherein,

[0144] The second region overlaps with the camera module, and

[0145] The resolution of the second pixel in the second region is lower than the resolution of the first pixel in the first region.

[0146] 3. The display panel according to Scheme 1, wherein the high-transmittance area is positioned to correspond to the light-transmitting pattern.

[0147] 4. The display panel according to Scheme 1, wherein,

[0148] The substrate includes a first substrate, a second substrate, and an inorganic film formed between the first substrate and the second substrate.

[0149] The first pixel and the second pixel are disposed on the second substrate, and

[0150] The high-transmittance region includes at least one of a first high-transmittance region disposed in the first substrate and a second high-transmittance region disposed in the second substrate.

[0151] 5. The display panel according to embodiment 4, wherein the first high-transmittance region is the region where the first substrate is removed and filled with transparent resin.

[0152] 6. The display panel according to embodiment 4, wherein the second high-transmittance region is the region where the second substrate is removed and filled with a transparent organic material or a transparent inorganic material.

[0153] 7. The display panel according to Scheme 6, wherein the transparent organic material or the transparent inorganic material is the same material as the layer included in the first pixel or the second pixel.

[0154] 8. The display panel according to embodiment 4, wherein the second high-transmittance region is disposed at a position corresponding to the light-transmitting region in the second region.

[0155] 9. The display panel according to embodiment 4, wherein,

[0156] Each of the first high-transmittance region and the second high-transmittance region has a tapered cross-section, and

[0157] In the cross-sectional view, the side surface of the first high-transmittance region is collinear with the side surface of the second high-transmittance region.

[0158] 10. The display panel according to Scheme 1, wherein,

[0159] The polarizing plate includes a first protective layer, a second protective layer, and a polarizer disposed between the first protective layer and the second protective layer.

[0160] The light-transmitting pattern is formed in the polarizer.

[0161] 11. The display panel according to claim 10, wherein the light-transmitting pattern includes an opening formed in the polarizer.

[0162] 12. The display panel according to claim 11, wherein the first protective layer includes a protrusion inserted into the opening.

[0163] 13. The display panel according to claim 10, wherein the light-transmitting area includes a color-changing area formed in the polarizer.

[0164] 14. The display panel according to claim 13, wherein the color-changing region is the region where the iodine compound of the polarizer is decomposed.

[0165] 15. The display panel according to claim 1 further includes an anti-reflective layer disposed in the second region and configured to reduce the diffusion or reflection of incident light.

[0166] 16. The display panel according to claim 15, wherein the anti-reflective layer is located on at least one of the upper portion of the interlayer insulating layer, the lower portion of the substrate, the upper portion of the polarizing plate, and the lower portion of the polarizing plate.

[0167] 17. The display panel according to embodiment 4, wherein the first high-transmittance region has a positively tapered cross section and the second high-transmittance region has a negatively tapered cross section, or

[0168] The first high-transmittance region has a reverse tapering cross section and the second high-transmittance region has a forward tapering cross section.

[0169] 18. A display device, comprising:

[0170] The display panel according to any one of Schemes 1 to 17.

Claims

1. A display panel, comprising: substrate; A first region is disposed on the substrate and includes a first pixel; as well as A second region is disposed on the substrate and includes a second pixel, and a light-transmitting region is disposed between the second pixels. The planarization layer is disposed on the light-emitting element layer in the first region and the second region, and The first thickness from the substrate to the planarization layer in the first region is different from the second thickness from the substrate to the planarization layer in the light-transmitting region of the second region.

2. The display panel according to claim 1 further includes a polarizing plate disposed on the first region and the second region. in, The planarization layer is disposed between the light-emitting element layer and the polarizing plate.

3. The display panel according to claim 1, wherein, The planarization layer comprises an organic material and is disposed on an inorganic insulating layer.

4. The display panel according to claim 1, wherein, The light-emitting element layer includes a first electrode, a light-emitting element disposed on the first electrode, and a second electrode disposed on the light-emitting element. The light-emitting elements are separated by dike layers, and The embankment includes a first groove disposed on the light-transmitting area.

5. The display panel according to claim 4, wherein, The second electrode is disposed on the dam layer and includes an opening disposed on the first groove.

6. The display panel according to claim 4, wherein, The planarization layer is disposed on the first groove of the embankment layer.

7. The display panel according to claim 4, wherein, The first thickness extends from the substrate to the planarization layer disposed on the light-emitting element, and the second thickness extends from the substrate to the planarization layer disposed on the first groove of the embankment.

8. The display panel according to claim 4, further comprising a cover layer disposed between the second electrode and the planarization layer. in, The cover layer is disposed on the first groove.

9. The display panel according to claim 1, further comprising: A buffer layer disposed on the substrate; An active layer disposed on the buffer layer; A gate insulating layer disposed on the active layer; Gate electrode disposed on the gate insulating layer; A first planarization layer is disposed on the gate electrode; A second planarization layer disposed on the first planarization layer; as well as A connection line passing through the first planarization layer and the second planarization layer connects the active layer and the light-emitting element layer. The buffer layer, the gate insulating layer, the first planarization layer, and the second planarization layer are disposed on the first region and the second region, respectively.

10. The display panel according to claim 9, wherein, The substrate includes a first flexible substrate, a second flexible substrate, and an inorganic layer disposed between the first flexible substrate and the second flexible substrate.

11. The display panel according to claim 10, wherein, The buffer layer includes a second groove corresponding to the light-transmitting area, and the first planarization layer includes a first portion disposed in the second groove.

12. The display panel according to claim 11, wherein, The substrate includes a third groove corresponding to the second groove, and the first planarization layer further includes a second portion disposed in the third groove.

13. The display panel according to claim 12, wherein, The third groove is disposed on the second flexible substrate.

14. The display panel according to claim 1, further comprising a polarizing plate disposed above the light-transmitting area and comprising a light-transmitting pattern having a higher light transmittance than the remaining area of ​​the polarizing plate.

15. The display panel according to claim 14, wherein, The polarizing plate includes a first protective layer, a second protective layer, and a polarizer disposed between the first protective layer and the second protective layer. The light-transmitting pattern is formed in the polarizer.

16. The display panel according to claim 15, wherein, The light-transmitting pattern includes openings formed in the polarizer.

17. The display panel according to claim 16, wherein, The first protective layer includes a protrusion inserted into the opening formed in the polarizer.

18. A display device, comprising: substrate; Buffer layer; A first region is disposed on the substrate and includes a first pixel; as well as A second region is disposed on the substrate and includes a second pixel, and a light-transmitting region is disposed between the second pixels. The light-emitting element layer includes a first electrode, a light-emitting element disposed on the first electrode, a second electrode disposed on the light-emitting element, and a dam layer separating the light-emitting elements. The embankment includes a first groove disposed on the light-transmitting area. The second electrode is disposed on the dam layer and includes an opening disposed on the first groove.

19. The display panel according to claim 18, wherein, The buffer layer includes a second groove corresponding to the first groove.

20. The display panel according to claim 19, wherein, The substrate includes a third groove corresponding to the second groove.

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