Display device

Abstract

A display device is provided. According to an embodiment, the display device includes: a display panel; a protection plate located on the back of the display panel and including an opening; a sensor located in the opening; and a pattern located in the display panel and overlapping the opening.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a display device including a sensor. Background Art

[0002] With the development of information and communication technology, mobile phones have various functions other than calling and text messaging, and the use of smart phones that can access the Internet to browse web pages and run various applications has become widespread.

[0003] Various applications can be operated based on user input information and using signals from sensors built into the mobile phone. In order to achieve safety in use, there is a trend to build sensors that can identify who the user is in the mobile phone. Summary of the invention

[0004] Each embodiment provides a display device capable of improving accuracy and convenience when a sensor is attached to the back surface of a display panel.

[0005] A display device according to an embodiment includes: a display panel; a protection plate located on the back of the display panel, the protection plate including an opening; a sensor located in the opening; and a pattern located in the display panel and overlapping the opening.

[0006] The display panel may include a substrate and a buffer layer located over the substrate, and the pattern may be located between the substrate and the buffer layer.

[0007] The pattern may include an alignment pattern located at a perimeter of the sensor.

[0008] The alignment pattern may include at least one alignment mark.

[0009] The alignment mark may be located at a corner of the opening.

[0010] The pattern may include an inspection pattern having a plurality of inspection lines.

[0011] The plurality of inspection lines may include inspection lines overlapping the sensor and inspection lines not overlapping the sensor.

[0012] The plurality of inspection lines may include an inspection line parallel to at least one side of the sensor.

[0013] The pattern may include a light shielding pattern. The light shielding pattern may not overlap with the alignment pattern.

[0014] The light shielding pattern may include at least one light shielding layer located on at least one side of the sensor.

[0015] The display panel may further include: a transistor located above the buffer layer; and a light shielding layer located between the substrate and the buffer layer and overlapping the semiconductor layer of the transistor. The pattern may be located at the same layer as the light shielding layer.

[0016] The pattern and the light shielding layer may be made of the same material, and the same material may be a conductive material including a metal or a metal alloy.

[0017] The sensor may be a fingerprint sensing sensor.

[0018] According to an embodiment, a display device includes: a display panel; a protective plate attached to the back of the display panel; and a sensor attached to the back of the display panel. The protective plate includes an opening formed through the protective plate, the sensor is located in the opening, and the display panel includes a pattern overlapping the opening.

[0019] The display panel may include a substrate, the substrate may include a first surface facing the front surface of the display panel and a second surface facing the back surface of the display panel, and the pattern may be located above the first surface of the substrate.

[0020] The display panel may further include: a transistor located above the substrate; and a light shielding layer located between the substrate and the transistor. The pattern may be made of the same material as the light shielding layer and may be located in the same layer.

[0021] The pattern may include an opening, and the light shielding layer may be located within the opening.

[0022] The pattern may include an alignment pattern including at least one alignment mark located at a periphery of the sensor.

[0023] The pattern may include an inspection pattern including an inspection line overlapping the sensor and an inspection line not overlapping the sensor.

[0024] The pattern may include: at least one light shielding layer located on at least one side of the sensor and not overlapping with the alignment pattern.

[0025] A display device according to an embodiment includes: a display panel; a protective plate attached to the back of the display panel; and a sensor attached to the back of the display panel. The protective plate includes an opening formed through the protective plate, the sensor is located in the opening, the display panel includes a pattern overlapping the opening and located around the attachment area of ​​the sensor, and the pattern and the electrode of the display panel are in the same layer and are made of the same material.

[0026] Effects of the Invention

[0027] According to the embodiment, by forming a pattern near the area where the sensor is attached, the accuracy of the sensor attachment can be improved. In addition, it is easy to check whether the sensor is accurately attached, and it is possible to prevent external light from penetrating the periphery of the sensor. In addition, no additional process is required when forming such a pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a cross-sectional view of a display device according to an embodiment.

[0029] Figure 2 is a rear perspective view of a display device according to an embodiment.

[0030] Figure 3 is a front perspective view of a display device according to an embodiment.

[0031] Figure 4 The user touches the fingerprint sensing area with his finger.

[0032] Figure 5 It is shown Figure 2 A top view of an embodiment of region A in FIG.

[0033] Figure 6 It is a top view showing the state before the sensor is attached.

[0034] Figure 7 and Figure 8 It is shown separately Figure 2 A top view of an embodiment of region A in FIG.

[0035] Fig. 9 is an equivalent circuit diagram of a pixel of a display device according to an embodiment.

[0036] Fig.10 FIG. 4 is a diagram showing an arrangement of several pixels of a display device according to an embodiment.

[0037] Fig.11 yes Fig.10 A cross-sectional view taken along line XI-XI'.

[0038] Explanation of symbols:

[0039] 10: Sensor 100: Display panel

[0040] 150: protection plate 155: opening

[0041] 200: Window 250: Polarizing layer

[0042] 30: Pattern 31: Alignment pattern

[0043] 32: Check pattern 33: Shading pattern

[0044] 37: light shielding layer 40, 50, 60: adhesive layer

[0045] AM: Alignment mark IL: Inspection line

[0046] LB: light-shielding layer. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0048] Throughout the specification, the same symbols are given to similar parts. In the drawings, the thickness or size of multiple layers and regions may be exaggerated or reduced for illustration in order to clearly show their arrangement and relative positions.

[0049] When a part such as a layer, film, region, plate, etc. is described as being "above" or "on" another part, it includes not only the case where it is "directly above" another part, but also the case where there is another part between them. Conversely, when a part is described as being "directly above" another part, it means that there is no other part between them.

[0050] When a part is described in the specification as “comprising” a certain structural element, unless there is any particular description to the contrary, it means that other structural elements are not excluded and other structural elements may be included.

[0051] When the term "on a plane" is used in the specification, it means that the target portion is viewed from above, and when the term "on a cross-section" is used, it means that the cross-section obtained by vertically cutting the target portion is viewed from the side.

[0052] When described as "overlapping" in the specification, unless otherwise specifically mentioned, it means overlapping "on a plane".

[0053] The display device of each embodiment is described in detail below with reference to the accompanying drawings. Even though an organic light emitting display device is used as an example for description, the present invention is not limited to the organic light emitting display device, and can be applied to other display devices such as liquid crystal display devices.

[0054] Figure 1 is a cross-sectional view of a display device 1 according to an embodiment.

[0055] The display device 1 includes: a display panel 100, a protective plate 150, a window 200, a polarizing layer 250, and a sensor 10. The display device 1 may further include: an adhesive layer 40 for attaching the window 200 to the polarizing layer 250; an adhesive layer 50 for attaching the protective plate 150 to the display panel 100; and an adhesive layer 60 for attaching the sensor 10 to the display panel 100.

[0056] The display panel 100 may be an organic light-emitting display panel. The display panel 100 may include a substrate and each pixel circuit and each light-emitting element formed on the substrate, and may also include an encapsulation layer covering each pixel circuit and each light-emitting element to prevent moisture and the like from invading from the outside. One pixel may include one pixel circuit and one light-emitting element. The substrate may be a transparent insulating substrate formed of a material such as glass or plastic.

[0057] The pixel circuit is a part that supplies a given current to the light-emitting element based on a signal applied from the outside, and the pixel circuit is located above the substrate. The light-emitting element is located above the pixel circuit and includes a light-emitting layer. The current supplied by the pixel circuit flows in the light-emitting element, and the brightness of the light emitted by the light-emitting layer changes according to the magnitude of the current, thereby being able to express grayscale.

[0058] The polarizing layer 250 and the window 200 are located on the front side of the display panel 100. An adhesive layer 40 for bonding the window 200 and the polarizing layer 250 can be provided between the window 200 and the polarizing layer 250. The polarizing layer 250 reduces the reflection of external light, thereby improving the contrast ratio and recognizability. The polarizing layer 250 can also be omitted. The window 200 serves to protect the front side of the display panel 100. The window 200 is coated with functional layers such as an antiglare layer and an anti-fingerprint layer. The adhesive layer 40 can use an optically transparent adhesive or resin such as OCA (optically clear adhesive) and OCR (optically clear resin).

[0059] The display device 1 may further include a touch sensor layer (not shown) capable of sensing touch inside the display panel 100 or on the front of the display panel 100. For example, a sensing electrode capable of sensing touch may be formed inside the display panel 100, or a substrate with a touch electrode may be disposed between the display panel 100 and the polarizing layer 250.

[0060] A protective plate 150 having an opening 155 is provided on the rear side of the display panel 100. The opening 155 of the protective plate 150 is formed by penetrating the protective plate 150, so that the rear area of ​​the display panel 100 corresponding to the opening 155 can be exposed. An adhesive layer 50 for bonding the display panel 100 and the protective plate 150 can be provided between the display panel 100 and the protective plate 150. In order to make the display panel 100 appear darker when displaying black, the protective plate 150 may include a black layer that is black. In addition, the protective plate 150 may include a cushion layer or an embossed layer to prevent the back of the display panel 100 from being damaged. The protective plate 150 may include at least one functional layer such as a shielding layer and a heat dissipation layer.

[0061] Although Figure 1 FIG. 4 shows a situation where the protection plate 150 is only located on the back side of the display panel 100 . However, the protection plate 150 may also extend to the side of the display panel 100 , thereby protecting the side of the display panel 100 .

[0062] The sensor 10 is located in the opening 155 of the protective plate 150. The opening 155 corresponds to the portion of the protective plate 150 cut away, and it can be understood that the area corresponding to the opening 155 in the protective plate 150 is removed. The opening 155 can be formed after the protective plate 150 is attached to the display panel 100, or the protective plate 150 with the opening 155 can be attached to the display panel 100. The portion of the adhesive layer 50 overlapping the opening 155 can be removed as shown in the figure, or can be retained differently.

[0063] The sensor 10 may be a fingerprint sensing sensor that senses the fingerprint of a user's finger that contacts the display device 1 from the front of the display panel 100 or approaches the display device 1. The sensor 10 is located in the opening 155 of the protection plate 150 in order to sense the fingerprint of the user on the front of the display panel 100 without interference from the protection plate 150.

[0064] The sensor 10 may be attached to the back of the display panel 100 via an adhesive layer 60 formed of an adhesive such as OCA, OCR, etc. or a double-sided tape. Alternatively or additionally, the sensor 10 may also be fixed to the display panel 100 via a resin surrounding its side surfaces.

[0065] Figure 2 is a rear perspective view of a display device 1 according to an embodiment, Figure 3 is a front perspective view of a display device 1 according to an embodiment. Figure 2 and Figure 3 The case where the display device 1 is a display device 1 used in a mobile phone or a smart phone is shown.

[0066] Reference Figure 2The protection plate 150 is located on the entire back side of the display device 1 , and the sensor 10 is located in the opening 155 of the protection plate 150 .

[0067] Reference Figure 3 On the front of the display device 1, a display area (DA) (equivalent to a screen) for displaying an image occupies most of the area, and the rest of the area is occupied by a non-display area (NA) for not displaying an image. According to an embodiment, the display area DA may cover the entire front of the display device 1, or the display area DA may be located on a side or a part of the back.

[0068] An area 15 capable of sensing fingerprints (hereinafter referred to as fingerprint sensing area 15 ) exists in the display area DA. The fingerprint sensing area 15 may correspond to the area where the sensor 10 is located. Figure 2 and Figure 3 The embodiment in which the sensor 10 is located in the back area of ​​the display device 1, that is, the fingerprint sensing area 15 is located in the display area DA and is located at the lower end of the display area DA is shown. However, the fingerprint sensing area 15 may be located in other parts of the display area DA. The fingerprint sensing area 15 may be provided at various positions according to the use state of the electronic device using the display device 1, and may also be provided at more than two positions.

[0069] Figure 4 The user touches the fingerprint sensing area 15 with his finger.

[0070] When the user touches the fingerprint sensing area 15 with a finger, the sensor 10 located on the back of the display panel 100 senses the fingerprint of the finger. The window 200, the polarizing layer 250 and the display panel 100 are located between the sensor 10 and the finger. The sensor 10 can sense the fingerprint by collecting and processing the light emitted from the pixels (more strictly speaking, the light-emitting layer) located in the display area DA of the display panel 100 and reflected by the finger and then transmitted to the sensor 10 through the window 200, the polarizing layer 250 and the display panel 100. The sensing of the fingerprint of the finger is different from the method of taking an image using a camera, etc. It can confirm the fingerprint pattern of the finger by sensing several parts of the finger. Therefore, as described in this embodiment, even if a part of the area of ​​the sensor 10 is blocked by the pixels of the display panel 100, etc., it can still be sensed. According to the embodiment, as a light source for sensing the fingerprint of the finger, a light-emitting part different from the pixel can also be used.

[0071] The following reference Figure 5 and Figure 6 The peripheral area to which the sensor 10 is bonded will be described.

[0072] Figure 5 It is shown Figure 2 A top view of an embodiment of the region A, Figure 6 It is a plan view showing a state before the sensor 10 is attached.

[0073] Reference Figure 5 , showing the peripheral area where the sensor 10 is attached. In order to attach the sensor 10 to the display panel 100, an opening 155 is formed in the protection plate 150, and the sensor 10 is located in the opening 155. The sensor 10 can have a substantially rectangular planar shape, but can also have other shapes. The opening 155 can be substantially rectangular, but can also have other shapes.

[0074] The pattern 30 is also located in the opening 155. The pattern 30 may exist in the display panel 100 overlapping with the opening 155. The pattern 30 may be formed of the same material in the same process as a layer formed in the display panel 100. For example, the pattern 30 may be formed of the same material in the same process as a light shielding layer formed in the display panel 100, in which case an additional process or use of a mask for forming the pattern 30 is not required. The light shielding layer will be described later.

[0075] The pattern 30 may include at least one of an alignment pattern 31 , an inspection pattern 32 , and a light shielding pattern 33 .

[0076] The alignment pattern 31 can be used to align the sensor 10 so that the sensor 10 is attached to the correct position. The alignment pattern 31 can be recognized by a detection unit such as a camera, so that the sensor 10 can be accurately aligned to the correct position when attaching the sensor 10. The alignment pattern 31 can be located around the sensor 10.

[0077] The alignment pattern 31 may include more than one alignment mark AM. For example, one alignment mark AM may be provided at each of the four corners of the opening 155. Alternatively, one alignment mark AM may be provided at each of two of the four corners of the opening 155. The alignment mark AM is located at the periphery of the sensor 10 in a manner that does not overlap with the sensor 10, but at least a portion of the alignment mark AM may overlap with the sensor 10. Each alignment mark AM may have a cross-shaped planar shape.

[0078] The inspection pattern 32 can be used to check whether the sensor 10 is attached to the correct position. The inspection pattern 32 can include a plurality of inspection lines IL. The inspection pattern 32 can include a plurality of inspection lines IL that are parallel to the four sides of the sensor 10. Figure 5 Refer to Figure 6When the inspection pattern 32 is formed, part of the inspection line IL does not overlap with the sensor 10, while part of the inspection line IL overlaps with the sensor 10. In other words, the inspection pattern 32 includes the inspection line IL also located in the region where the sensor 10 is attached. When the inspection pattern 32 is formed as described above, it is possible to easily understand whether the sensor 10 is correctly attached by simply checking the number of lines that do not overlap with the sensor 10 through visual inspection or the like.

[0079] For example, after attaching the sensor 10, if the number of inspection lines IL observed on the left side of the sensor 10 is 1 and the number of inspection lines IL observed on the right side of the sensor 10 is 3, it can be determined that the sensor 10 is attached so as to be biased to the left. On the other hand, if the number of inspection lines IL observed on the left side of the sensor 10 is 2 and the number of inspection lines IL observed on the right side of the sensor 10 is 2, it can be determined that the sensor 10 is attached so as not to be biased to the left or right. Similarly, if the number of inspection lines IL observed on the upper side of the sensor 10 is 2 and the number of inspection lines IL observed on the lower side of the sensor 10 is 2, it can be determined that the sensor 10 is attached so as not to be biased to the upper side or the lower side.

[0080] The light shielding pattern 33 may be located in an area of ​​the opening 155 where the sensor 10 and the alignment pattern 31 are not present. Since the opening 155 is an area where the protective plate 150 is removed, light may flow into the display panel 100 through the opening 155. The area in the opening 155 where the sensor 10 is located may be blocked by the sensor 10, but according to an embodiment, due to the light flowing around the sensor 10, when the display device 1 is observed from the front, the area around the sensor 10 in the display area DA may be different, for example, it may be recognized as a stain. By forming the light shielding pattern 33 around the sensor 10 to minimize the inflow of light through the opening 155, the above-mentioned problems can be improved.

[0081] The light shielding pattern 33 may include a plurality of light shielding layers LB. For example, a light shielding layer LB may be provided on the left side, right side, top side, and bottom side of the sensor 10. In order to identify the alignment mark AM and the inspection line IL, the light shielding layer LB may be formed separately from the alignment mark AM and the inspection line IL.

[0082] Figure 7 and Figure 8 It is shown separately Figure 2 A top view of an embodiment of region A.

[0083] Reference Figure 7 , the shape of the alignment mark AM is similar to Figure 5That is, the alignment mark AM may be in the shape of a hook bracket (『』). In addition, the alignment mark AM may have various shapes such as a polygon, a circle, an ellipse, or a text pattern, as long as it is a shape that can be identified by a detection means.

[0084] Reference Figure 8 , alignment mark AM and Figure 7 The embodiment of is also in the shape of a hook bracket, but with Figure 7 In this case, each alignment mark AM is located in the majority of the area where the sensor 10 is located in the opening 155, and the use of such alignment marks AM can block the light from flowing into the display panel 100. Figure 8 In the embodiment of the present invention, the pattern 30 does not include the aforementioned light shielding pattern 33 .

[0085] The following reference Fig. 9 , Fig.10 as well as Fig.11 The display device 1 according to one embodiment is described with the pixels in the display area DA as the center. In order to explain the relationship with other components of the display device, other drawings are also referred to unless otherwise mentioned.

[0086] Fig. 9 is an equivalent circuit diagram of a pixel of a display device according to an embodiment, Fig.10 is a layout diagram of several pixels of a display device according to an embodiment, Fig.11 is Fig.10 A cross-sectional view taken along line XI-XI'. Fig.10 The pixels shown may be pixels located in a region overlapping with the opening 155 of the protection plate 150 .

[0087] Reference Fig. 9 In a display device according to an embodiment, a pixel PX located in a display area DA includes transistors T1 to T7 connected to display signal lines 151, 152, 153, 158, 171, 172, and 192, a storage capacitor Cst, and a light emitting element EL.

[0088] Each transistor T1 - T7 may include: a driving transistor T1 , a switching transistor T2 , a compensation transistor T3 , an initialization transistor T4 , an action control transistor T5 , a light emission control transistor T6 , and a bypass transistor T7 .

[0089] Each display signal line 151 , 152 , 153 , 158 , 171 , 172 , 192 may include a scan line 151 , a front-end scan line 152 , a light emitting control line 153 , a bypass control line 158 , a data line 171 , a driving voltage line 172 and an initialization voltage line 192 .

[0090] The front-end scanning line 152 transmits the front-end scanning signal Sn-1 to the initialization transistor T4, the light-emitting control line 153 transmits the light-emitting control signal EM to the action control transistor T5 and the light-emitting control transistor T6, and the bypass control line 158 transmits the bypass signal BP to the bypass transistor T7.

[0091] The data line 171 may be applied with a data signal Dm, and the driving voltage line 172 and the initialization voltage line 192 may be applied with a driving voltage ELVDD and an initialization voltage Vint, respectively. The initialization voltage Vint initializes the driving transistor T1.

[0092] Each transistor T1-T7 includes a gate electrode G1-G7, a source electrode S1-S7, and a drain electrode D1-D7, and the storage capacitor Cst includes a first electrode E1 and a second electrode E2. The electrodes of the transistors T1-T7 and the storage capacitor Cst may be as follows: Fig. 9 The anode of the light emitting element EL, which may be an organic light emitting diode, is connected to the drain electrode D1 of the driving transistor T1 via the light emitting control transistor T6, and the cathode of the light emitting element EL is connected to the common voltage line 741 transmitting the common voltage ELVSS.

[0093] The circuit structure of the pixel PX is not limited to Fig. 9 The structures shown, the number of transistors and the number of capacitors and the connections between them can be modified in various ways.

[0094] Reference Fig.10 For example, a pixel region including a red pixel R, a green pixel G, and a blue pixel B is shown. Such pixels R, G, and B may be repeatedly arranged on the display panel 100 .

[0095] Scan lines 151 , front scan lines 152 , light control lines 153 and bypass control lines 158 for respectively transmitting scan signals Sn, front scan signals Sn-1, light control signals EM and bypass signals BP extend substantially along the first direction x. The bypass control lines 158 may be the same as the front scan lines 152 .

[0096] The data line 171 and the driving voltage line 172 for transmitting the data signal Dm and the driving voltage ELVDD respectively extend substantially along the second direction y. The initialization voltage line 192 for transmitting the initialization voltage Vint has portions 192a substantially parallel to the first direction x and portions 192b inclined relative to the first direction x extending alternately.

[0097] The driving transistor T1, the switching transistor T2, the compensation transistor T3, the initialization transistor T4, the action control transistor T5, the light emitting control transistor T6, the bypass transistor T7, the storage capacitor Cst and the light emitting element EL can be formed in Fig.10 Position shown.

[0098] The light emitting element EL includes a pixel electrode 191, a light emitting layer 370, and a common electrode 270. The compensation transistor T3 and the initialization transistor T4 may have a dual gate structure for blocking leakage current.

[0099] The channels of the driving transistor T1, the switching transistor T2, the compensating transistor T3, the initializing transistor T4, the operation controlling transistor T5, the light emitting controlling transistor T6 and the bypass transistor T7 are located in one semiconductor layer 130. The semiconductor layer 130 may be formed to be bent in various shapes.

[0100] The positions and arrangements of these components can be variously changed according to the design.

[0101] Reference Fig.10 and Fig.11 , the cross-sectional structure of the display area DA is described with several transistors T1, T2, T6 and the storage capacitor Cst as the center.

[0102] Reference Fig.10 and Fig.11 The display panel 100 includes a substrate 110 and various layers and components formed on the substrate 110. The substrate 110 may be a flexible substrate made of a polymer such as polyimide, polyamide, or polyethylene terephthalate. The substrate 110 may include a barrier layer for preventing diffusion of impurities that deteriorate semiconductor characteristics and preventing intrusion of moisture or the like. The substrate 110 may be a rigid substrate made of glass or the like. One of the two flat surfaces of the substrate 110 ( Fig.11 The lower surface in the figure) may correspond to the back surface of the display panel 100.

[0103] The light shielding layer 37 and the pattern 30 are located above the substrate 110. The light shielding layer 37 blocks external light from reaching the semiconductor layer 130, thereby preventing the characteristics of the semiconductor layer 130 from being reduced. The light shielding layer 37 can be used to control the transistor, especially the leakage current of the driving transistor T1 whose current characteristics are important. The light shielding layer 37 can overlap with the driving channel 131a which is the channel of the driving transistor T1. The light shielding layer 37 can contain a material that does not transmit light of the wavelength band to be blocked, for example, it can be made of conductive materials such as metals and metal alloys. The light shielding layer 37 can be electrically connected to the driving voltage line 172 to be applied with the driving voltage ELVDD, or electrically connected to the drain electrode D2 of the switching transistor T2 to be applied with the data signal Dm. That is, the light shielding layer 37 can act as an electrode to which a specific voltage is applied in the display panel 100. In this case, in the voltage-current characteristic diagram of the driving transistor T1, the current change rate becomes smaller in the saturation region, thereby improving the characteristics as a current driving transistor. The light shielding layer 37 may be electrically connected to other transistors or signal lines of the pixel PX, or may be in a floating state.

[0104] As mentioned above, the pattern 30 includes: an alignment pattern 31, a check pattern 32 or a light shielding pattern 33. In order to be separated from the light shielding layer 37, the pattern 30 may correspond to the area where the light shielding layer 37 is located and include an opening 35 larger than the light shielding layer 37, and the light shielding layer 37 may be located in the opening 35. The pattern 30 shown in the figure may be a part of the alignment pattern 31 or the light shielding pattern 33. The light shielding layer 37 and the pattern 30 may be formed of the same material in the same process. For example, the light shielding layer 37 and the pattern 30 may be formed together by patterning after depositing a conductive material on the substrate 110. As a result, there is no need to add a process or use a mask separately to form the pattern 30 for the sensor 10.

[0105] The buffer layer 120 is located above the light shielding layer 37 and the pattern 30. The buffer layer 120 can block impurities that may diffuse from the substrate 110 to the semiconductor layer 130 and reduce the pressure on the substrate 110 during the formation of the semiconductor layer 130. The buffer layer 120 can include inorganic insulating materials such as silicon oxide and silicon nitride. The light shielding layer 37 and the pattern 30 can also be located above the buffer layer 120. In this case, an insulating layer covering the light shielding layer 37 and the pattern 30 can be provided above them.

[0106] A semiconductor layer 130 including a driving channel 131a, a switching channel 131b, a light emission control channel 131f, etc. is disposed over the buffer layer 120. The semiconductor layer 130 may include polycrystalline silicon, an oxide semiconductor, or amorphous silicon.

[0107] In the semiconductor layer 130, a source electrode 136a and a drain electrode 137a of the driving transistor T1 are disposed on both sides of the driving channel 131a, a source electrode 136b and a drain electrode 137b of the switching transistor T2 are disposed on both sides of the switching channel 131b, and a source electrode 136f and a drain electrode 137f of the light emission control transistor T6 are disposed on both sides of the light emission control channel 131f.

[0108] The first insulating layer 141 is located above the semiconductor layer 130. A first gate conductor is disposed above the first insulating layer 141, and includes a scan line 151 including a gate electrode 155b of the switching transistor T2, a front-end scan line 152, a light emission control line 153 including a gate electrode 155f of the light emission control transistor T6, a bypass control line 158, and a gate electrode (first electrode) 155a including the driving transistor T1.

[0109] The second insulating layer 142 is located above the first gate conductor and the first insulating layer 141. A second gate conductor is disposed above the second insulating layer 142, and includes a storage line 157 and a second electrode 156 as a portion extending from the storage line 157. The second electrode 156 forms a storage capacitor Cst together with the first electrode 155a.

[0110] The first gate conductor and the second gate conductor may include metals or metal alloys such as molybdenum (Mo), copper (Cu), aluminum (Al), silver (Ag), chromium (Cr), tantalum (Ta), and titanium (Ti). The first insulating layer 141 and the second insulating layer 142 may include inorganic insulating materials such as silicon oxide and silicon nitride.

[0111] A third insulating layer 160 which may include an inorganic insulating material and / or an organic insulating material is disposed above the second insulating layer 142 and the second gate conductor. Contact holes 61-67 are formed in the third insulating layer 160.

[0112] A data conductor including a data line 171, a driving voltage line 172, a driving connection member 174, an initialization connection member 175, and a pixel connection member 179 is disposed above the third insulating layer 160. The data line 171 is connected to the source electrode 136b of the switching transistor T2 through a contact hole 62 formed in the insulating layers 141, 142, and 160. One end of the driving connection member 174 is connected to the first electrode 155a through a contact hole 61 formed in each of the insulating layers 142 and 160, and the other end of the driving connection member 174 is connected to the drain electrode of the compensation transistor T3 and the drain electrode of the initialization transistor T4 through a contact hole 63 formed in each of the insulating layers 141, 142, and 160. The initialization connection member 175 is connected to the source electrode of the initialization transistor T4 through a contact hole 64 formed in each of the insulating layers 141, 142, and 160. The pixel connection member 179 is connected to the drain electrode 137 f of the light emission control transistor T6 through a contact hole 66 formed in each of the insulating layers 141 , 142 , and 160 .

[0113] The data conductor may include, for example, metals such as aluminum (Al), copper (Cu), silver (Ag), molybdenum (Mo), chromium (Cr), gold (Au), platinum (Pt), palladium (Pd), tantalum (Ta), tungsten (W), titanium (Ti), nickel (Ni), or metal alloys, and may be a multi-layered material.

[0114] A fourth insulating layer 180 that may include an organic insulating material is disposed above the data conductor and the third insulating layer 160, and a pixel electrode 191 and an initialization voltage line 192 are disposed above the fourth insulating layer 180. The pixel connection member 179 is connected to the pixel electrode 191 through a contact hole 81 formed in the fourth insulating layer 180, and the initialization connection member 175 is connected to the initialization voltage line 192 through a contact hole 82 formed in the fourth insulating layer 180.

[0115] An insulating layer 350 having an opening 351 overlapping the pixel electrode 191 is disposed over the fourth insulating layer 180. The insulating layer 350 may be referred to as a pixel definition layer. The insulating layer 350 may include an organic insulating substance.

[0116] The light emitting layer 370 is located above the pixel electrode 191, and the common electrode 270 is located above the light emitting layer 370. The common electrode 270 may also be located above the insulating layer 350, thereby being formed by a plurality of pixels.

[0117] The pixel electrode 191 may be an anode. The common electrode 270 may be a cathode. The pixel electrode 191 may include a metal or a metal alloy such as silver (Ag), nickel (Ni), gold (Au), platinum (Pt), aluminum (Al), copper (Cu), molybdenum / aluminum neodymium (Mo / AlNd). The pixel electrode 191 may include a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), and may be a multiple layer such as ITO / silver (Ag / ITO). The common electrode 270 may be formed into a thin layer using a metal with a low work function such as calcium (Ca), barium (Ba), magnesium (Mg), aluminum (Al), silver (Ag), etc., so as to have light transmittance.

[0118] The common electrode 270 may also be formed of a transparent conductive material such as ITO or IZO. The pixel electrode 191 of each pixel, the light emitting layer 370 and the common electrode 270 constitute a light emitting element EL which may be an organic light emitting diode.

[0119] An encapsulation layer 400 for protecting the light emitting element EL may be disposed above the common electrode 270, and a polarizing layer for reducing external light reflection may be disposed above the encapsulation layer 400. The encapsulation layer 400 may be a thin film encapsulation layer including at least one inorganic substance layer and at least one organic substance layer.

[0120] As described above, the pattern 30 can be formed of the same material in the same process as the light shielding layer 37, but can also be formed of the same material in the same process as other electrodes or conductors of the display panel 100. For example, the pattern 30 can also be formed of the same material in the same layer as electrodes or signal lines such as the scan line 151, the gate electrode 155a, the second electrode 156, the data line 171, the driving voltage line 172, the pixel electrode 191, and the common electrode 270.

[0121] The embodiments of the present invention are described in detail above, but the protection scope of the present invention is not limited thereto. Various modifications and improvements implemented by those skilled in the art using the basic concepts of the present invention defined in the claims also fall within the protection scope of the present invention.

Claims

1. A display device, comprising: Display panel; A protection plate, located on the back of the display panel and comprising an opening; a sensor located in the opening; as well as a pattern, located in the display panel and overlapping the opening; The pattern includes an alignment pattern located at a perimeter of the sensor.

2. The display device according to claim 1, wherein: The display panel includes a substrate and a buffer layer located above the substrate. The pattern is located between the substrate and the buffer layer.

3. The display device according to claim 2, wherein: The display panel further includes: a transistor located above the buffer layer; and a light shielding layer, located between the substrate and the buffer layer, overlapping with the semiconductor layer of the transistor, The pattern and the light shielding layer are located on the same layer.

4. The display device according to claim 3, wherein: The pattern and the light shielding layer are made of the same material, and the same material is a conductive material including metal or metal alloy.

5. The display device according to claim 1, wherein: The alignment pattern includes at least one alignment mark located at a corner of the opening.

6. The display device according to claim 1, wherein: The pattern includes a light shielding pattern.

7. The display device according to claim 6, wherein: The light shielding pattern is formed on at least one light shielding layer located on at least one side of the sensor.

8. The display device according to claim 1, wherein: The pattern includes an inspection pattern having a plurality of inspection lines.

9. A display device, comprising: Display panel; A protection plate, attached to the back of the display panel; as well as A sensor is attached to the back of the display panel. The protective plate includes an opening formed through the protective plate, The sensor is located within the opening, The display panel includes a pattern overlapping the opening and located around the attachment area of ​​the sensor, The pattern and the electrode of the display panel are formed of the same material in the same layer, The pattern includes an alignment pattern located at a perimeter of the sensor.

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