Display device

Abstract

A display device is disclosed. The display device includes a substrate including a first display area and a second display area surrounding at least a portion of the first display area; the first pixel part is arranged in the first display area; the first pixel circuit part is arranged in the first display area and is electrically connected with the first pixel part; a circuit driving portion disposed on the second display area and driving the first pixel circuit portion; a second pixel portion disposed on the second display area to overlap with the circuit driving portion; the second pixel circuit part is arranged in the second display area and is electrically connected with the second pixel part; and a light sensing area disposed on the second display area and disposed to overlap with the electronic element.

Description

Technical Field

[0001] An embodiment of the utility model relates to a display device. Background Art

[0002] Generally, a display device operates by forming a light emitting element such as an organic light emitting diode and a thin film transistor on a substrate and causing the light emitting element to emit light.

[0003] Specifically, each pixel of the display device has a light-emitting element such as an organic light-emitting diode having an intermediate layer including a light-emitting layer sandwiched between a pixel electrode and an opposite electrode. The display device generally controls the light emission or the degree of light emission of each pixel by a thin film transistor electrically connected to the pixel electrode. A part of the layers included in the intermediate layer of such a light-emitting element are arranged together in a plurality of light-emitting elements. Utility Model Content

[0004] The embodiment of the utility model is to provide a display device with improved resolution. However, these technical problems are exemplary, and the scope of the utility model is not limited thereto.

[0005] According to one aspect of the utility model, a display device is provided, comprising: a substrate, comprising a first display area and a second display area surrounding at least a portion of the first display area; a first pixel portion, arranged in the first display area; a first pixel circuit portion, arranged in the first display area and electrically connected to the first pixel portion; a circuit driving portion, arranged on the second display area and driving the first pixel circuit portion; a second pixel portion, arranged on the second display area to overlap with the circuit driving portion; a second pixel circuit portion, arranged in the second display area and electrically connected to the second pixel portion; and a light sensing area, arranged on the second display area and arranged to overlap with an electronic component.

[0006] A distance spaced apart between the second pixel portions in the first direction may be greater than a distance spaced apart between the first pixel portions in the first direction.

[0007] According to this embodiment, the light sensing area may be arranged along a periphery of the first display area.

[0008] According to the present embodiment, the first pixel portion may include a first pixel, a second pixel, and a third pixel that respectively emit light of different colors.

[0009] The second pixel portion may include a first pixel, a second pixel, and a third pixel that respectively emit light of different colors.

[0010] According to the present embodiment, the sum of the areas of the light emitting regions of the second pixel portions may be smaller than the sum of the areas of the light emitting regions of the first pixel portions.

[0011] According to this embodiment, the sum of the areas of the light emitting regions of the first pixel portion may be the sum of the areas of the light emitting regions of the first pixel, the second pixel, and the third pixel included in the first pixel portion.

[0012] According to this embodiment, the display device may further include: a pixel definition film arranged on the substrate; a light-emitting diode, including a pixel electrode arranged in a first opening defined in the pixel definition film, an intermediate layer and a counter electrode arranged on the pixel electrode, and the area of ​​the light-emitting region of the first pixel may be the same as the area of ​​the first opening defined in the pixel definition film.

[0013] According to this embodiment, the electronic component may be arranged in the second opening defined in the pixel definition film, and the area of ​​the light sensing region may be the same as the area of ​​the second opening defined in the pixel definition film.

[0014] According to this embodiment, the number of the first pixel units per the same area of ​​the first display region and the number of the second pixel units per the same area of ​​the second display region may be the same.

[0015] According to this embodiment, the number of the light sensing regions arranged in the second display area may be the same as the number of the second pixel portions arranged in the second display area.

[0016] According to this embodiment, the number of the second pixel portions per the same area of ​​the second display region may be smaller than the number of the first pixel portions per the same area of ​​the first display region.

[0017] According to this embodiment, the sum of the areas of the light emitting regions of the second pixel portions arranged in the second display region may be the same as the sum of the areas of the light emitting regions of the first pixel portions arranged in the first display region.

[0018] According to the present embodiment, only the light sensing area may be arranged in the second display area surrounding a corner extending in the first direction among corners of the first display area.

[0019] According to the present embodiment, only the light sensing area may be arranged in the second display area surrounding a corner extending in a second direction intersecting the first direction among corners of the first display area.

[0020] According to the present embodiment, the first pixel portion and the first pixel circuit portion may be arranged to overlap each other.

[0021] According to the present embodiment, the second pixel portion and the second pixel circuit portion may not overlap with each other.

[0022] According to the present embodiment, the circuit driving part may include: a data driving part extending along the first direction and providing a data signal to the first pixel circuit part and the second pixel circuit part.

[0023] According to the present embodiment, the circuit driving section may include a scan driving section extending in a second direction crossing the first direction and providing a scan signal to the first pixel circuit section and the second pixel circuit section.

[0024] According to this embodiment, the electronic component overlapping the light sensing area may be a light detector.

[0025] According to one embodiment of the present invention configured as described above, a display device with improved resolution and visibility can be realized. Of course, the scope of the present invention is not limited to such effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure schematically shows a plan view of a display device according to an embodiment of the present invention.

[0027] Figure 2 A plan view of a first pixel portion is schematically shown.

[0028] Figures 3 to 6 is a plan view schematically showing a display device according to an embodiment of the present invention.

[0029] Figure 7 is a cross-sectional view schematically showing a display device according to an embodiment of the present invention.

[0030] Figure 8 is a cross-sectional view schematically showing a display device according to an embodiment of the present invention.

[0031] Fig. 9 This is an equivalent circuit diagram of a pixel circuit electrically connected to a light-emitting diode included in a pixel.

[0032] Description of Reference Numerals

[0033] DA1: first display area DA2: second display area

[0034] PXs1: first pixel portion PXs2: second pixel portion

[0035] PCs1: first pixel circuit section PCs2: second pixel circuit section

[0036] 20: Light sensing area DETAILED DESCRIPTION

[0037] The utility model can be implemented in a variety of ways and can have a variety of embodiments, and specific embodiments are exemplarily shown in the drawings and described in detail in the detailed description. The effects and features of the utility model and the methods for achieving these effects and features will become clear with reference to the embodiments described in detail below in conjunction with the drawings. However, the utility model can be implemented in a variety of forms and is not limited to the embodiments disclosed below.

[0038] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals, and repeated descriptions thereof are omitted.

[0039] In the following embodiments, the terms "first" and "second" do not have limiting meanings but are used to distinguish one constituent element from another constituent element.

[0040] In the following embodiments, unless the context clearly dictates otherwise, an expression in the singular includes an expression in the plural.

[0041] In the following embodiments, the terms such as “including” or “having” refer to the presence of the features or constituent elements described in the specification, and do not preclude the possibility of adding one or more other features or constituent elements.

[0042] In the following embodiments, when part of a film, region, component, etc. is located on or above another part, this includes not only the case where it is directly located on another part, but also the case where another film, region, component, etc. is sandwiched therebetween.

[0043] In the drawings, the size of the components may be enlarged or reduced for the convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for the convenience of description, and therefore the present invention is not limited to the size and thickness shown in the drawings.

[0044] When a certain embodiment can be implemented in different ways, a specific process sequence can be performed differently from the described sequence. For example, two processes described in succession can be performed substantially at the same time, or can be performed in a sequence opposite to the described sequence.

[0045] In the present specification, "A and / or B" means A or B, or A and B. Also, "at least one of A and B" means A or B, or A and B.

[0046] In the following embodiments, when it is mentioned that a film, region, component, etc. is connected, it includes the case where the film, region, component, etc. is directly connected, and / or the case where another film, region, component, etc. is sandwiched between the film, region, component, etc. and the case where it is indirectly connected. For example, in this specification, when it is mentioned that a film, region, component, etc. is connected, it means the case where the film, region, component, etc. is directly electrically connected, and / or the case where another film, region, component, etc. is sandwiched between them and the case where it is indirectly electrically connected.

[0047] The x-axis, y-axis, and z-axis are not limited to the three axes on the orthogonal coordinate system, and can be interpreted as including a wide range of meanings thereof. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may also indicate different directions that are not orthogonal to each other.

[0048] Figure 1 The plan view of a display device according to an embodiment of the present utility model is schematically shown. Specifically, Figure 1 The figure schematically shows a pixel portion and a circuit driving portion of a display device.

[0049] The display device according to the embodiment of the utility model can be used as a device for displaying video or still images, and can be used not only for portable electronic devices such as mobile phones, smart phones, tablet personal computers, mobile communication terminals, electronic notepads, electronic books, portable multimedia players (PMP: portable multimedia player), navigators, ultra-portable mobile personal computers (UMPC: Ultra Mobile PC), etc., but also for display screens of various products such as televisions, notebook computers, monitors, billboards, and Internet of Things (IOT: Internet of Things) devices. In addition, the display device according to the embodiment can be used for wearable devices such as smart watches, watch phones, glasses-type displays, and head-mounted displays (HMD: head mounted display). In addition, the display device according to an embodiment can include a dashboard of a car, a central information display (CID: Center Information Display) arranged on the center fascia or dashboard of the car, a room mirror display (room mirror display) instead of a side mirror of the car, and a display arranged on the back of the front seat as an entertainment device for the rear seat of the car.

[0050] The display device 1 may include a first display area DA1 and a second display area DA2. In other words, the substrate 100 included in the display device 1 may include a first display area DA1 and a second display area DA2. The second display area DA2 may be arranged to surround at least a portion of the first display area DA1. The first display area DA1 may also be completely surrounded by the second display area DA2. The first display area DA1 may have a rectangular shape. Specifically, the length of the first display area DA1 extending in a first direction (e.g., the x direction or the -x direction) may be longer than the length of the first display area DA1 extending in a second direction (e.g., the y direction or the -y direction). However, the utility model is not limited thereto. The first display area DA1 may have a circular, square, or elliptical shape, and the length of the first display area DA1 extending in a second direction (e.g., the y direction or the -y direction) may be longer than the length of the first display area DA1 extending in a first direction (e.g., the x direction or the -x direction).

[0051] In one embodiment, a first pixel portion PXs1 may be arranged in the first display area DA1, and a second pixel portion PXs2 may be arranged in the second display area DA2. A first pixel circuit portion PCs1 that drives the first pixel portion PXs1 arranged in the first display area DA1 may be arranged in the first display area DA1. Specifically, the first pixel circuit portion PCs1 may be arranged to overlap with the first pixel portion PXs1. A second pixel circuit portion PCs2 that drives the second pixel portion PXs2 arranged in the second display area DA2 may be arranged in the second display area DA2. In other words, the second pixel circuit portion PCs2 that drives the second pixel portion PXs2 may be arranged not to overlap with the second pixel portion PXs2. However, the present invention is not limited thereto.

[0052] In the second display area DA2, not only the second pixel portion PXs2 and the second pixel circuit portion PCs2 may be arranged, but also the circuit driving portions 11 and 12 for driving the first pixel circuit portion PCs1 and the second pixel circuit portion PCs2 may be arranged. The circuit driving portions 11 and 12 may include a scan driving portion 12 and a data driving portion 11. The data driving portion 11 may be arranged to extend along a first direction (e.g., an x ​​direction or a -x direction) in the second display area DA2. The scan driving portion 12 may be arranged to extend along a second direction (e.g., a y direction or a -y direction) in the second display area DA2.

[0053] The data driving unit 11 may supply a data signal to the first pixel circuit unit PCs1 through the first data line DL1, and may supply a data signal to the second pixel circuit unit PCs2 through the second data line DL2. The scanning driving unit 12 may supply a scanning signal to the first pixel circuit unit PCs1 through the first scanning line SL1, and may supply a scanning signal to the second pixel circuit unit PCs2 through the second scanning line SL2.

[0054] In one embodiment, the first pixel section PSx1 and the first pixel circuit section PCs1 arranged in the first display area DA1 may be arranged to overlap each other. Since the data driving section 11 and the scan driving section 12 are arranged in the second display area DA2, if the second pixel section PXs2 is arranged to overlap with the data driving section 11 and the scan driving section 12, the second pixel circuit section PCs2 may be arranged not to overlap with the second pixel section PXs2. The second pixel section PXs2 is also arranged in the second display area DA2 where the data driving section 11 and the scan driving section 12 are arranged, so the area of ​​the region where the picture is displayed in the display device 1 can be increased, and the resolution can be increased.

[0055] Figure 2 A plan view of a first pixel portion is schematically shown.

[0056] In one embodiment, the first pixel portion PXs1 may include a first pixel PX1, a second pixel PX2, and a third pixel PX3. The first pixel PX1 may emit light of a first color, the second pixel PX2 may emit light of a second color, and the third pixel PX3 may emit light of a third color. Specifically, the first color may be blue, the second color may be red, and the third color may be green.

[0057] The first pixel PX1 may be a first light emitting region EA1 that emits light of a first color, and the second pixel PX2 may be a second light emitting region EA2 that emits light of a second color. Also, the third pixel PX3 may be a third light emitting region EA3 that emits light of a third color. The sum of the areas of the light emitting regions of the first pixel portion PXs1 may be the sum of the areas of the first light emitting region EA1 of the first pixel PX1, the second light emitting region EA2 of the second pixel PX2, and the third light emitting region EA3 of the third pixel PX3.

[0058] Each of the first pixel PX1, the second pixel PX2, and the third pixel PX3 may include a light emitting diode ED (refer to Figure 8 ). Light Emitting Diode ED (refer to Figure 8 ) may include a pixel electrode 210a (refer to Figure 8 )、the first intermediate layer 220a (refer to Figure 8 ) and the counter electrode 230 (refer to Figure 8). Light Emitting Diode ED (refer to Figure 8 ) can be arranged on the pixel definition film 209 (refer to Figure 8 ) of the first opening 209OP1 (refer to Figure 8 ), and the first intermediate layer 220a and the counter electrode 230 may be arranged on the pixel electrode 210a. The first light emitting region EA1, the second light emitting region EA2, and the third light emitting region EA3 may be light emitting diodes ED (refer to Figure 8 ) The light emitting area may be the same as the area of ​​the first opening 209OP1 of the pixel definition film 209.

[0059] Although not shown, similar to the first pixel portion PXs1, the second pixel portion PXs2 may also include a first pixel PX1, a second pixel PX2, and a third pixel PX3. The first pixel PX1 may emit light of a first color, the second pixel PX2 may emit light of a second color, and the third pixel PX3 may emit light of a third color. Specifically, the first color may be blue, the second color may be red, and the third color may be green. The first pixel PX1 may be a first light emitting area EA1 that emits light of a first color, the second pixel PX2 may be a second light emitting area EA2 that emits light of a second color, and the third pixel PX3 may be a third light emitting area EA3 that emits light of a third color. The sum of the areas of the light emitting areas included in the second pixel portion PXs2 may be the sum of the areas of the first light emitting area EA1 of the first pixel PX1, the second light emitting area EA2 of the second pixel PX2, and the third light emitting area EA3 of the third pixel PX3 included in the second pixel portion PXs2.

[0060] Figures 3 to 6 is a plan view schematically showing a display device according to an embodiment of the present invention.

[0061] Reference Figure 3 ,like Figure 1 As described above, a first pixel portion PXs1 may be disposed in the first display area DA1, and a second pixel portion PXs2 may be disposed in the second display area DA2. A light sensing area 20 may be disposed in the second display area DA2. A light detector LS may be disposed at the lower portion of the light sensing area 20 (refer to Figure 7 ), so that the display device 1 can recognize fingerprints, blood pressure, irises, etc. In the second display area DA2, not only the light sensing area 20 but also the second pixel portion PXs2 can be arranged, so that the resolution of the periphery of the display device 1 can be improved.

[0062] The distance a1 between the second pixel portions PXs2 of the second display area DA2 in the first direction (e.g., the x direction or the -x direction) may be greater than the distance b1 between the first pixel portions PXs1 of the first display area DA1 in the first direction (e.g., the x direction or the -x direction). In the second display area DA2, not only the second pixel portions PXs2 but also the light sensing area 20 are arranged, and therefore, the distance a1 between the second pixel portions PXs2 in the first direction (e.g., the x direction or the -x direction) may be greater than the distance b1 between the first pixel portions PXs1 in the first direction (e.g., the x direction or the -x direction).

[0063] In one embodiment, the sum of the areas of the light emitting regions of the second pixel portions PXs2 may be smaller than the sum of the areas of the light emitting regions of the first pixel portions PXs1. The number of first pixel portions PXs1 per same area of ​​the first display area DA1 may be the same as the number of second pixel portions PXs2 per same area of ​​the second display area DA2.

[0064] The light sensing area 20 of the second display area DA2 may surround at least a portion of the first display area DA1. In other words, the light sensing area 20 of the second display area DA2 may be arranged along the periphery of the first display area DA1.

[0065] The number of light sensing regions 20 arranged in the second display area DA2 may be the same as the number of second pixel units PXs2 arranged in the second display area DA2. In other words, one second pixel unit PXs2 and one light sensing region 20 may form a group and may be arranged in the second display area DA2 along the periphery of the first display area DA1. However, the present invention is not limited thereto. Although not shown, only the light sensing region 20 may be arranged in the second display area DA2 of the corners extending in the first direction (e.g., the x direction or the -x direction) around the corners of the first display area DA1. Furthermore, only the light sensing region 20 may be arranged in the second display area DA2 of the corners extending in the second direction (e.g., the y direction or the -y direction) intersecting the first direction around the corners of the first display area DA1.

[0066] Reference Figure 4, the distance a2 between the second pixel portions PXs2 in the first direction (e.g., the x direction or the -x direction) may be greater than the distance b2 between the first pixel portions PXs1 in the first display area DA1 in the first direction (e.g., the x direction or the -x direction). In the second display area DA2, not only the second pixel portions PXs2 but also the light sensing area 20 are arranged, so the distance a2 between the second pixel portions PXs2 in the first direction (e.g., the x direction or the -x direction) may be greater than the distance b2 between the first pixel portions PXs1 in the first direction (e.g., the x direction or the -x direction).

[0067] In one embodiment, the sum of the areas of the light emitting regions of the first pixel portion PXs1 and the sum of the areas of the light emitting regions of the second pixel portion PXs2 may be the same. The number of first pixel portions PXs1 per same area of ​​the first display area DA1 and the number of second pixel portions PXs2 per same area of ​​the second display area DA2 may be different. Specifically, the number of second pixel portions PXs2 per same area of ​​the second display area DA2 may be less than the number of first pixel portions PXs1 per same area of ​​the first display area DA1.

[0068] The light sensing area 20 of the second display area DA2 may surround at least a portion of the first display area DA1. In other words, the light sensing area 20 of the second display area DA2 may be arranged along the periphery of the first display area DA1.

[0069] The number of light sensing regions 20 arranged in the second display area DA2 may be the same as the number of second pixel portions PXs2 arranged in the second display area DA2. In other words, the light sensing regions 20 and the second pixel portions PXs2 may be alternately arranged in the second display area DA2. However, the present invention is not limited thereto.

[0070] The number of the light sensing regions 20 arranged in the second display area DA2 may be greater than the number of the second pixel parts PXs2 arranged in the second display area DA2. Figure 5 , only the light sensing area 20 may be arranged in the second display area DA2 surrounding a corner extending in the first direction (eg, the x direction or the −x direction) among the corners of the first display area DA1. Figure 6 Only the light sensing area 20 may be disposed in the second display area DA2 surrounding a corner extending in a second direction (eg, y direction or −y direction) crossing the first direction among corners of the first display area DA1.

[0071] Figure 7 is a cross-sectional view schematically showing a display device according to an embodiment of the present invention.

[0072] Reference Figure 7 The display device 1 according to an embodiment of the present invention may include a substrate 100 , a first pixel PX1 , a second pixel PX2 , a third pixel PX3 arranged on the substrate 100 , a light detector LS, and a cover window CW.

[0073] Each of the first pixel PX1, the second pixel PX2, and the third pixel PX3 may include a light emitting diode ED (refer to Figure 8 ) and a pixel circuit PC connected to the light emitting diode ED (refer to Figure 8 ), and the light detector LS may include a light receiving diode PD (refer to Figure 8 ) and a sensor circuit SC connected to a light receiving diode PD (refer to Figure 8 ).

[0074] In one embodiment, the first pixel PX1, the second pixel PX2, and the third pixel PX3 may emit light of different colors. For example, the first pixel PX1 may emit light of a first color, the second pixel PX2 may emit light of a second color, and the third pixel PX3 may emit light of a third color. In this case, the light of the first color, the light of the second color, and the light of the third color may be red light, green light, and blue light, respectively, but the present invention is not limited thereto.

[0075] The display device 1 may have a function of sensing an object (e.g., a fingerprint of a finger F) in contact with the cover window CW. As an embodiment, light emitted from at least one of the first pixel PX1, the second pixel PX2, and the third pixel PX3 may be reflected by a fingerprint of a user and may be incident on the light detector LS again. The light detector LS may detect the reflected light and convert it into an electrical signal. For example, light of a first color emitted from the first pixel PX1 is reflected by a fingerprint of a finger F in contact with the cover window CW and is incident on the light detector LS again, so that the light detector LS may acquire a fingerprint pattern of the finger F.

[0076] Figure 7 The example of acquiring information of an object in contact with the display device 1 by using reflection of light emitted from the first pixel PX1 is shown, but the present invention is not limited thereto. The display device 1 may also detect an object that is not in contact with the cover window CW of the display device 1 .

[0077] Figure 8 Schematically shows a cross-sectional view of a display device according to an embodiment of the present utility model. Specifically, Figure 8 Schematically shows the observation along line II' Figure 3 A cross-sectional view of a display device.

[0078] Reference Figure 8, a pixel PX and a light detector LS may be arranged on the substrate 100. A pixel PX may include a light emitting diode ED and a pixel circuit PC electrically connected to the light emitting diode ED, and the light detector LS may include a light receiving diode PD and a sensor circuit SC electrically connected to the light receiving diode PD. The light emitting diode ED may be an organic light emitting diode as a light emitting element, and the light receiving diode PD may be an organic photodiode as a light receiving element.

[0079] A barrier layer 101 may be disposed on the substrate 100. The barrier layer 101 may include an inorganic insulator such as silicon nitride, silicon oxide, or silicon oxynitride.

[0080] A buffer layer 201 may be disposed on the barrier layer 101. The barrier layer 101 and the buffer layer 201 may reduce the penetration of foreign matter, moisture, or external gas from the lower portion of the substrate 100, and may provide a flat surface on the substrate 100. The buffer layer 201 may include an inorganic substance such as silicon nitride, silicon oxide, or silicon oxynitride, an organic substance, or an organic-inorganic composite.

[0081] The buffer layer 201 may be provided with a pixel circuit PC and a sensor circuit SC. The pixel circuit PC may include a thin film transistor TFT and a storage capacitor Cst. The thin film transistor TFT may include a semiconductor layer Act, a gate electrode, a source electrode SE, and a drain electrode DE, and the storage capacitor Cst may include a first electrode CE1 and a second electrode CE2.

[0082] The semiconductor layer Act may be disposed on the buffer layer 201. The semiconductor layer Act may include polycrystalline silicon. Alternatively, the semiconductor layer Act may include amorphous silicon, or may include an oxide semiconductor, or may include an organic semiconductor, etc. The semiconductor layer Act may include a channel region and a drain region and a source region respectively disposed on both sides of the channel region.

[0083] A gate electrode may be arranged on the semiconductor layer Act. The gate electrode may overlap with the channel region of the semiconductor layer Act. The gate electrode may include a low-resistance metal material. The gate electrode may include a conductive material including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may be formed as a single layer or multiple layers including the above materials.

[0084] A first gate insulating layer 203 may be disposed between the semiconductor layer Act and the gate electrode. The first gate insulating layer 203 may include an inorganic insulator such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, titanium oxide, tantalum oxide, hafnium oxide, or zinc oxide. The first gate insulating layer 203 may be a single layer or multiple layers including the above inorganic insulators.

[0085] A second gate insulating layer 204 may be disposed on the gate electrode GE to cover the gate electrode GE. The second gate insulating layer 204 may include an inorganic insulator such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, titanium oxide, tantalum oxide, hafnium oxide, or zinc oxide. The second gate insulating layer 204 may be a single layer or multiple layers including the above inorganic insulators.

[0086] A second electrode CE2 of the storage capacitor Cst may be disposed on the second gate insulating layer 204. At least a portion of the second electrode CE2 may overlap with the gate electrode GE. In this case, the gate electrode GE overlapping with the second electrode CE2 of the storage capacitor Cst may serve as the first electrode CE1 of the storage capacitor Cst. For example, the gate electrode may be formed as one body with the first electrode CE1.

[0087] The second electrode CE2 may include a conductive substance including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may be formed as a single layer or a multilayer including the above materials.

[0088] An interlayer insulating layer 205 may be disposed on the second electrode CE2. The interlayer insulating layer 205 may be formed to cover the second electrode CE2, and the interlayer insulating layer 205 may be a single layer or multiple layers including the above-mentioned inorganic insulator. The inorganic insulating layer IIL includes a buffer layer 201, a first gate insulating layer 203, a second gate insulating layer 204, and an interlayer insulating layer 205.

[0089] The source electrode SE and the drain electrode DE are arranged on the interlayer insulating layer 205. The source electrode SE and the drain electrode DE may include a conductive material including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may be formed as a single layer or multiple layers including the above materials. As an example, the source electrode SE and the drain electrode DE may be formed as a multilayer structure of Ti / Al / Ti. In some embodiments, the source electrode SE or the drain electrode DE may also be omitted.

[0090] The sensor circuit SC may include a detection thin film transistor STFT, etc. The detection thin film transistor STFT included in the sensor circuit SC may have a structure similar to that of the thin film transistor TFT included in the pixel circuit PC.

[0091] exist Figure 8In the figure, for the convenience of explanation, one thin film transistor TFT and one detection thin film transistor STFT are shown, but the thin film transistor TFT and the detection thin film transistor STFT may be respectively equipped with multiple thin film transistors. In one embodiment, a part of the multiple thin film transistors TFT and the multiple detection thin film transistors STFT may be silicon thin film transistors including a silicon semiconductor layer, and the remaining part may be oxide thin film transistors including an oxide semiconductor layer. In this case, the inorganic insulating layer IIL may also include an insulating layer between the second gate insulating layer 204 and the interlayer insulating layer 205 for insulating the oxide semiconductor layer and the conductive layer arranged on the oxide semiconductor layer.

[0092] The organic insulating layer OIL may be disposed to cover the pixel circuit PC and the sensor circuit SC. The organic insulating layer OIL may include a first planarization layer 206, a second planarization layer 207, and a third planarization layer 208 sequentially stacked in a thickness direction (Z-axis direction).

[0093] The first planarization layer 206 , the second planarization layer 207 , and the third planarization layer 208 may provide a flat base surface for the pixel electrode 210 a of the light emitting diode ED and the detection electrode 210 b of the light receiving diode PD disposed thereon.

[0094] The first planarization layer 206, the second planarization layer 207, and the third planarization layer 208 may include a general polymer such as benzocyclobutene (BCB), polyimide, hexamethyldisiloxane (HMDSO), polymethyl methacrylate (PMMA), or polystyrene (PS), a polymer derivative having a phenolic group, an acrylic polymer, an imide polymer, an aromatic ether polymer, an amide polymer, a fluorine polymer, a paraxylene polymer, or a vinyl alcohol polymer, etc. Each of the first planarization layer 206, the second planarization layer 207, and the third planarization layer 208 may be a single layer or a multilayer including the above-mentioned organic insulator.

[0095] A first connection electrode CM1 may be disposed between the first planarization layer 206 and the second planarization layer 207, and a second connection electrode CM2 may be disposed between the second planarization layer 207 and the third planarization layer 208. The first connection electrode CM1 may be connected to the drain electrode DE of the thin film transistor TFT through a contact hole defined in the first planarization layer 206. The second connection electrode CM2 may be connected to the first connection electrode CM1 through a contact hole defined in the second planarization layer 207.

[0096] The first and second connection electrodes CM1 and CM2 may include a conductive substance including molybdenum (Mo), aluminum (Al), copper (Cu), titanium (Ti), etc., and may be formed as a single layer or multiple layers including the above materials.

[0097] A light emitting diode ED and a light receiving diode PD may be arranged on the organic insulating layer OIL. The light emitting diode ED may include a pixel electrode 210a, an opposite electrode 230, and a first intermediate layer 220a arranged between the pixel electrode 210a and the opposite electrode 230. The light receiving diode PD may include a detection electrode 210b, an opposite electrode 230, and a second intermediate layer 220b arranged between the detection electrode 210b and the opposite electrode 230. The opposite electrode 230 of the light emitting diode ED and the opposite electrode 230 of the light receiving diode PD may be configured as a whole.

[0098] The pixel electrode 210a and the detection electrode 210b may be spaced apart from each other and disposed on the third planarization layer 208. The pixel electrode 210a may be electrically connected to the thin film transistor TFT of the pixel circuit PC via the first connection electrode CM1 and the second connection electrode CM2.

[0099] The pixel electrode 210a may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In 2 O 3 The pixel electrode 210a may include a reflective film containing silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr) or a compound thereof. In one embodiment, the pixel electrode 210a may have a conductive oxide such as ITO, IZO, ZnO or In on the upper / lower side of the reflective film. 2 O 3 The pixel electrode 210a may have a structure of a stacked layer of ITO / Ag / ITO.

[0100] The detection electrode 210 b may be electrically connected to the detection thin film transistor STFT of the sensor circuit SC via the connection electrode. The detection electrode 210 b may also have a structure that is the same as or similar to that of the pixel electrode 210 a.

[0101] The pixel definition film 209 may be arranged on the third planarization layer 208 in a manner covering the respective edges of the pixel electrode 210a and the detection electrode 210b. The pixel definition film 209 may define a first opening 209OP1 exposing the central portion of the pixel electrode 210a and a second opening 209OP2 exposing the central portion of the detection electrode 210b. The size and shape of the light emitting area EA of the light emitting diode ED may be defined by the first opening 209OP1 exposing the central portion of the pixel electrode 210a. The size and shape of the light sensing area 20 of the light receiving diode PD may be defined by the second opening 209OP2 exposing the central portion of the detection electrode 210b.

[0102] The pixel definition film 209 increases the distance between the edge of the pixel electrode 210a and the counter electrode 230 and the distance between the edge of the detection electrode 210b and the counter electrode 230, respectively, so as to prevent arcing etc. from being generated at the edge of the pixel electrode 210a and the edge of the detection electrode 210b. The pixel definition film 209 includes organic insulating materials such as polyimide, polyamide, acrylic resin, benzocyclobutene, hexamethyldisiloxane (HMDSO: hexamethyldisiloxane) and phenolic resin, and can be formed by spin coating or the like.

[0103] A first intermediate layer 220a may be disposed on the pixel electrode 210a and may include a light emitting layer 222a disposed corresponding to the pixel electrode 210a, a first functional layer 221 disposed below and / or above the light emitting layer 222a, and a second functional layer 223.

[0104] A second intermediate layer 220b may be arranged on the detection electrode 210b. The second intermediate layer 220b may include an active layer 222b arranged corresponding to the detection electrode 210b, a first functional layer 221 arranged below and / or above the active layer 222b, and a second functional layer 223. The first functional layer 221 and the second functional layer 223 may be common layers integrally provided on the light emitting diode ED and the light receiving diode PD.

[0105] The light-emitting layer 222a may include an organic substance containing a fluorescent or phosphorescent substance that emits red, green, blue, or white light. Such a light-emitting layer 222a may be an organic light-emitting layer including a low-molecular organic substance or a high-molecular organic substance. For example, the light-emitting layer 222a may include copper phthalocyanine, tris-8-hydroxyquinoline aluminum, polystyrene (PPV: Poly-Phenylenevinylene)-based substances, or polyfluorene-based substances as an organic light-emitting layer.

[0106] In one embodiment, the light emitting layer 222a may include a host material and a dopant material. The dopant material, as a material that emits light of a specific color, may include a light emitting material. The light emitting material may include at least one of a phosphorescent dopant, a fluorescent dopant, and a quantum dot.

[0107] The active layer 222b may include a p-type organic semiconductor and an n-type organic semiconductor. At this time, the p-type organic semiconductor may be used as an electron donor, and the n-type organic semiconductor may be used as an electron acceptor.

[0108] In one embodiment, the active layer 222b may be a mixed layer in which a p-type organic semiconductor and an n-type organic semiconductor are mixed. In this case, the active layer 222b may be formed by co-depositing a p-type organic semiconductor and an n-type organic semiconductor. In the case where the active layer 222b is a mixed layer, excitons may be generated from within the diffusion length of the donor-acceptor interface.

[0109] In one embodiment, the p-type organic semiconductor may be a compound used as an electron donor for supplying electrons. For example, the p-type organic semiconductor may include subphthalocyanine boron chloride (SubPc), copper (II) phthalocyanine (CuPc), dibutyl phthalate (DBP) or any combination thereof, but is not limited thereto.

[0110] In one embodiment, the n-type organic semiconductor may be a compound used as an electron acceptor for receiving electrons. For example, the n-type organic semiconductor may include C60 fullerene, C70 fullerene, or any combination thereof, but is not limited thereto.

[0111] In one embodiment, the first functional layer 221 may include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer. The first functional layer 221 may have a single-layer structure or a multi-layer structure. When the first functional layer 221 is configured as a multi-layer structure, the first functional layer 221 includes a hole injection layer and a hole transport layer stacked sequentially in the thickness direction (z-axis direction), or includes a hole injection layer and an electron blocking layer, or includes a hole transport layer and an electron blocking layer, or includes a hole injection layer, a hole transport layer, and an electron blocking layer. However, the utility model is not limited thereto.

[0112] In one embodiment, the second functional layer 223 may include at least one of an electron injection layer (Electron Injection Layer), an electron transport layer (Electron Transport Layer) and a hole blocking layer (Hole Blocking Layer). The second functional layer 223 may have a single-layer structure or a multi-layer structure. In the case where the second functional layer 223 is configured as a multi-layer structure, the second functional layer 223 includes an electron transport layer and an electron injection layer stacked sequentially in the thickness direction (z-axis direction), or includes a hole blocking layer and an electron injection layer, or includes a hole blocking layer and an electron transport layer, or includes a hole blocking layer, an electron transport layer and an electron injection layer. However, the utility model is not limited to this.

[0113] The counter electrode 230 may be arranged on the first intermediate layer 220a and the second intermediate layer 220b. The counter electrode 230 may be made of a conductive material having a relatively low work function. For example, the counter electrode 230 may include a (semi) transparent layer containing silver (Ag), magnesium (Mg), aluminum (Al), nickel (Ni), chromium (Cr), lithium (Li), calcium (Ca) or an alloy thereof. Alternatively, the counter electrode 230 may further include a conductive material such as ITO, IZO, ZnO or In on the (semi) transparent layer including the above-mentioned materials. 2 O 3 As an embodiment, the counter electrode 230 may include silver (Ag) and magnesium (Mg). The counter electrode 230 may be integrally arranged on the entire surface of the display area DA. For example, the counter electrode 230 of the light emitting diode ED and the counter electrode 230 of the light receiving diode PD may be integrally configured.

[0114] An encapsulation layer 300 may be arranged on the counter electrode 230 to cover the light emitting diode ED and the light receiving diode PD. In one embodiment, the encapsulation layer 300 may include at least one inorganic encapsulation layer and at least one organic encapsulation layer. For example, the encapsulation layer 300 may include a first inorganic encapsulation layer 310, a second inorganic encapsulation layer 330, and an organic encapsulation layer 320 arranged between the first inorganic encapsulation layer 310 and the second inorganic encapsulation layer 330.

[0115] Each of the first inorganic encapsulation layer 310 and the second inorganic encapsulation layer 330 may include at least one inorganic insulator. The inorganic insulator may include silicon oxide, silicon nitride, or silicon oxynitride. The first inorganic encapsulation layer 310 and the second inorganic encapsulation layer 330 may be formed by chemical vapor deposition.

[0116] The organic encapsulation layer 320 may further include polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane (HMDSO), acrylic resin or a combination thereof. The organic encapsulation layer 320 may provide a flat upper surface. Therefore, even in the case where the input sensing layer is formed on the encapsulation layer 300 by a continuous process, the defect rate may be reduced.

[0117] The encapsulation layer 300 may be arranged to cover the entire first display area DA1 , and extend to the second display area DA2 to cover at least a portion of the second display area DA2 .

[0118] Fig. 9 This is an equivalent circuit diagram of a pixel circuit electrically connected to a light-emitting diode included in a pixel.

[0119] Reference Fig. 9 , the pixel circuit PC may include a first transistor T1, a second transistor T2, and a storage capacitor Cst. The second transistor T2 is connected to the scan line SL and the data line DL as a switching transistor, and is turned on by a switching signal input from the scan line SL to transmit the data signal input from the data line DL to the first transistor T1. One end of the storage capacitor Cst may be electrically connected to the second transistor T2, and the other end may be electrically connected to the driving voltage line PL, and may store a voltage corresponding to the difference between the voltage received from the second transistor T2 and the driving power supply voltage ELVDD supplied to the driving voltage line PL.

[0120] The first transistor T1 is used as a driving transistor, connected to the driving voltage line PL and the storage capacitor Cst, and can control the magnitude of the driving current flowing from the driving voltage line PL to the light emitting diode ED corresponding to the voltage value stored in the storage capacitor Cst. The light emitting diode ED can emit light with a predetermined brightness by the driving current. The opposite electrode of the light emitting diode ED can receive the electrode power supply voltage ELVSS.

[0121] Fig. 9 The pixel circuit PC includes two transistors and one storage capacitor, but the present invention is not limited thereto. For example, the number of transistors or the number of storage capacitors can be varied in various ways according to the design of the pixel circuit PC.

[0122] According to an embodiment of the utility model, a pixel portion (i.e., a second pixel portion PXs2) may be arranged not only in the first display area DA1 but also in the second display area DA2 where the circuit driving portion 11, 12 and the light sensing area 20 are arranged, thereby improving the resolution of the periphery of the display device 1.

[0123] The present invention is described with reference to the embodiments shown in the accompanying drawings, but this is only exemplary, and a person skilled in the art with ordinary knowledge in the technical field to which the present invention belongs should understand that various modifications and other equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be determined by the technical ideas of the attached claims.

Claims

1. A display device, It is characterized in that include: A substrate comprising a first display area and a second display area surrounding at least a portion of the first display area; A first pixel portion, arranged in the first display area; a first pixel circuit portion, arranged in the first display area and electrically connected to the first pixel portion; a circuit driving unit, arranged on the second display area and driving the first pixel circuit unit; a second pixel portion, arranged on the second display area to overlap with the circuit driving portion; a second pixel circuit portion, arranged in the second display area and electrically connected to the second pixel portion; as well as The light sensing area is arranged on the second display area and is arranged to overlap with the electronic component.

2. The display device according to claim 1, It is characterized in that A distance between the second pixel portions in the first direction is greater than a distance between the first pixel portions in the first direction.

3. The display device according to claim 1, It is characterized in that The light sensing area is arranged along a periphery of the first display area.

4. The display device according to claim 1, It is characterized in that The first pixel portion includes a first pixel, a second pixel, and a third pixel that respectively emit light of different colors.

5. The display device according to claim 1, It is characterized in that The second pixel portion includes a first pixel, a second pixel, and a third pixel that respectively emit light of different colors.

6. The display device according to claim 4, It is characterized in that The sum of the areas of the light-emitting regions of the second pixel portions is smaller than the sum of the areas of the light-emitting regions of the first pixel portions.

7. The display device according to claim 6, It is characterized in that The sum of the areas of the light emitting regions of the first pixel portion is the sum of the areas of the light emitting regions of the first pixel, the second pixel, and the third pixel included in the first pixel portion.

8. The display device according to claim 7, It is characterized in that The display device further includes: A pixel definition film is arranged on the substrate; A light emitting diode comprises a pixel electrode arranged in a first opening defined by the pixel definition film, an intermediate layer and a counter electrode arranged on the pixel electrode, The area of ​​the light emitting region of the first pixel is the same as the area of ​​the first opening defined in the pixel definition film.

9. The display device according to claim 8, It is characterized in that The electronic component is arranged in the second opening defined in the pixel definition film, The area of ​​the light sensing region is the same as the area of ​​the second opening defined in the pixel definition film.

10. The display device according to claim 2, It is characterized in that The number of the first pixel portions per the same area of ​​the first display region and the number of the second pixel portions per the same area of ​​the second display region are the same.

11. The display device according to claim 2, It is characterized in that The number of the light sensing regions arranged in the second display area is the same as the number of the second pixel portions arranged in the second display area.

12. The display device according to claim 2, It is characterized in that The number of the second pixel portions per the same area of ​​the second display region is smaller than the number of the first pixel portions per the same area of ​​the first display region.

13. The display device according to claim 2, It is characterized in that The sum of the areas of the light emitting regions of the second pixel portions arranged in the second display region is the same as the sum of the areas of the light emitting regions of the first pixel portions arranged in the first display region.

14. The display device according to claim 2, It is characterized in that Only the light sensing area is arranged in the second display area surrounding a corner extending in the first direction among the corners of the first display area.

15. The display device according to claim 2, It is characterized in that Only the light sensing area is arranged in the second display area surrounding a corner extending in a second direction intersecting the first direction among corners of the first display area.

16. The display device according to claim 1, It is characterized in that The first pixel section and the first pixel circuit section are arranged to overlap each other.

17. The display device according to claim 1, It is characterized in that The second pixel portion and the second pixel circuit portion do not overlap each other.

18. The display device according to claim 2, It is characterized in that The circuit driving unit comprises: The data driving unit extends along the first direction and provides data signals to the first pixel circuit unit and the second pixel circuit unit.

19. The display device according to claim 18, It is characterized in that The circuit driving unit comprises: The scan driving section extends in a second direction intersecting the first direction and supplies a scan signal to the first pixel circuit section and the second pixel circuit section.

20. The display device according to claim 1, It is characterized in that The electronic component overlapping the light sensing area is a light detector.

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