Display device and display panel for controlling viewing angle

Abstract

Provided is a display device including a display area including a plurality of pixel sets, and a non-display area disposed adjacent to the display area, at least one of the plurality of pixel sets includes a first pixel controlling a viewing angle to a first range, a second pixel controlling the viewing angle to a second range, and a third pixel controlling the viewing angle to a third range symmetrical to the first range, the first pixel comprises a first driving transistor, a first light-emitting device and at least one first light control device arranged on the first light-emitting device, and the second pixel comprises a second driving transistor, a second light-emitting device and at least one second light control device arranged on the second light-emitting device. And the third pixel includes a third driving transistor, a third light emitting device, and at least one third light control device disposed on the third light emitting device, the at least one third light control device having a shape symmetrical to the first light control device.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2023-0134634, filed on October 10, 2023, which is incorporated herein by reference as if fully set forth herein. Technical Field

[0003] The present disclosure relates to a display panel for controlling a viewing angle and a display device including the display panel. Background Art

[0004] As the information society develops, various types of display devices have been developed. Recently, various display devices such as a liquid crystal display (LCD), a plasma display panel (PDP), and an organic light emitting display (OLED) have been used.

[0005] Recently, it is necessary to limit the viewing angle of a display device for reasons such as privacy and information protection. For example, when a display device is used as an information medium inside a vehicle, a high-definition image is provided to a passenger in a passenger seat, but for safe driving, the viewing angle needs to be limited for the driver. Summary of the invention

[0006] The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to provide a display panel and a display device capable of effectively limiting a viewing angle.

[0007] However, the problems of the present specification are not limited to the above-mentioned problems, and other technical problems can be inferred from the following embodiments.

[0008] According to one aspect of the present disclosure, the above and other purposes can be achieved by providing a display panel and a display device, which include: a display area, the display area including multiple pixel sets; and a non-display area, the non-display area is arranged adjacent to the display area, wherein at least one of the multiple pixel sets includes a first pixel that controls the viewing angle to a first range, a second pixel that controls the viewing angle to a second range, and a third pixel that controls the viewing angle to a third range symmetrical to the first range, the first pixel includes a first driving transistor, a first light-emitting device, and at least one first light control device arranged on the first light-emitting device, the second pixel includes a second driving transistor, a second light-emitting device, and at least one second light control device arranged on the second light-emitting device, and the third pixel includes a third driving transistor, a third light-emitting device, and at least one third light control device arranged on the third light-emitting device, and the at least one third light control device has a shape symmetrical to the first light control device.

[0009] Details of other embodiments are included in the detailed description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An example of a display device according to an embodiment of the present specification is shown.

[0011] Figure 2 A functional block diagram of a display device according to an embodiment of the present specification is shown.

[0012] Figure 3 An example of a pixel circuit of a display device according to an embodiment of this specification is shown.

[0013] Figure 4 : is a view showing an implementation example of a display device according to an embodiment of the present specification.

[0014] Figure 5 An example of a pixel set according to an embodiment of the present specification is shown.

[0015] Figure 6 Shows Figure 5 Example of section AA'.

[0016] Figure 7 Shows Figure 5 Example of section BB'.

[0017] Figure 8 Shows Figure 5 Example of section C-C'.

[0018] Fig. 9 An example of a pixel set according to another embodiment of the present specification is shown.

[0019] Fig.10 Shows Fig. 9 Example of cross section D-D'.

[0020] Fig.11 Shows Fig. 9 Example of section EE'.

[0021] Fig.12 Shows Fig. 9 Example of section F-F'.

[0022] Fig.13A and Fig. 13B An example of a pixel set according to another embodiment of the present specification is shown.

[0023] Fig.14 Shows Fig. 13B Example of section G-G'. DETAILED DESCRIPTION

[0024] Considering the functions of the present disclosure, the terms used in the embodiments of the present specification are selected as general terms that are currently used as widely as possible, but this may change according to the intentions of technicians involved in the field or precedents, the emergence of new technologies, etc. In some cases, there are terms arbitrarily selected by the applicant, in which case the meaning will be described in detail in the applicable description. Therefore, the terms used in this specification should be defined based on the meaning of the terms and the overall content of the present disclosure, rather than just the names of the terms.

[0025] When a part of the specification “comprises” components, this means that it may also include other components rather than excluding them unless otherwise stated.

[0026] The expression "at least one of a, b and c" described throughout the specification may include 'a alone', 'b alone', 'c alone', 'a and b', 'a and c', 'b and c' or 'a, b and c' or 'all of a, b and c'. Advantages and features of the present invention and methods of achieving the same will become apparent with reference to the embodiments described in detail with reference to the accompanying drawings.

[0027] Since the shapes, areas, ratios, angles, quantities, etc. disclosed in the drawings used to describe the embodiments in this specification are illustrative, the embodiments of this specification are not limited to the illustrative contents. When describing the embodiments, if it is determined that the detailed description of the related known technology may unnecessarily make the subject matter of the embodiments difficult to understand, its detailed description will be omitted.

[0028] If "including", "having", "implemented" and the like are used in this specification, other parts may be added. In the case of expressing a component in the singular, unless otherwise explicitly stated, a plurality of components are included. In addition, when explaining a component, even if there is no separate explicit description, it is interpreted as including a range of error.

[0029] In the case of describing a positional relationship, for example, if the positional relationship of two parts is described as "on", "above", "below", "to the side of", etc., one or more other parts may be located between the two parts. When an element or layer is referred to as being "on another element" or "on a layer", all cases where another layer or another element is inserted just above or between other elements are included.

[0030] In addition, various components are described using terms such as first, second, etc., but these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, the first component mentioned below can be the second component within the technical concept of the present invention.

[0031] The features of each of the various embodiments of this specification may be partially or completely combined or combined with each other, may be technically interlocked and driven in various ways, and each embodiment may be performed independently of each other or may be performed together in a related relationship.

[0032] In addition, the terms described later are defined in consideration of the functions in the embodiments of the present specification and may vary according to the intention or habit of the user or operator. Therefore, they should be defined based on the contents of the entire specification.

[0033] The transistor constituting the pixel circuit of the present specification may include at least one of an oxide thin film transistor (TFT), an amorphous silicon TFT (a-Si TFT), and a low temperature polysilicon (LTPS) TFT.

[0034] Hereinafter, the embodiments of the organic light-emitting display device will be described in detail. However, the embodiments of the present specification are not limited to the organic light-emitting display device and can be applied to an inorganic light-emitting display device including an inorganic light-emitting material. For example, the embodiments of the present specification can be applied to a quantum dot display device.

[0035] Hereinafter, embodiments of the present specification will be described with reference to the accompanying drawings.

[0036] Figure 1 An example of a display device according to an embodiment of the present specification is shown.

[0037] In an embodiment, the display device 100 may be provided on at least a portion of a dashboard of a vehicle. The display device 100 may be provided to intersect with a driver seat and a passenger seat provided in the front seats of the vehicle, and may be provided in front of the front seats. In this case, users of the display device 100 may include a driver in the driver seat and a passenger in the passenger seat. That is, both the driver and the passenger of the vehicle may use the display device 100.

[0038] In addition, the dashboard or display device 100 may also include input configurations for manipulating various functions related to the interior of the vehicle. For example, the dashboard or display device 100 may manipulate air conditioning, an audio system, a navigation system, and the like.

[0039] The display device 100 can provide various information related to the vehicle. For example, the display device 100 can provide vehicle driving information, such as the current speed of the vehicle, the remaining fuel amount, and the driving distance. In addition, the display device 100 can provide information about vehicle components, such as the degree of damage to the vehicle tires.

[0040] In an embodiment, Figure 1 Only a portion of the display device 100 may be shown. That is, Figure 1The display device 100 shown may indicate a portion corresponding to the display panel among various components included in the display device 100. For example, Figure 1 The display device 100 shown may represent at least a portion of a display area and a non-display area of ​​a display panel. Figure 1 Components other than those shown may be installed in the vehicle interior.

[0041] Figure 2 is a functional block diagram of a display device according to an embodiment of the present specification.

[0042] refer to Figure 2 , the display device may include a display panel DP, a data driver DD, a gate driver GD, a timing controller TC, and a power supply unit PU.

[0043] In an embodiment, the display panel DP may generate an image to be provided to a user. For example, the display panel DP may generate and display an image to be provided to a user through a pixel area PA provided with a pixel circuit.

[0044] The data driver DD, the gate driver GD, the timing controller TC, and the power supply unit PU may provide signals for the operation of each pixel area PA through signal lines. The signal lines may include, for example Figure 3 The data lines DL, the gate lines GL and the power voltage supply lines PL are shown.

[0045] For example, the data driver DD can be Figure 3 The data lines DL may apply data signals to each pixel area PA, the gate driver GD may apply gate signals to each pixel area PA through the gate lines GL, and the power supply unit PU may provide a power voltage to each pixel area PA through the power voltage supply lines PL.

[0046] The timing controller TC may control the data driver DD and the gate driver GD. For example, the timing controller TC may rearrange digital video data input from the outside to match the resolution of the display panel DP and provide the digital video data to the data driver DD.

[0047] The data driver DD may convert the digital video data input from the timing controller TC into an analog data voltage based on the data control signal and supply the analog data voltage to the data lines.

[0048] The gate driver GD may generate a scan signal and a light emitting signal based on the gate control signal. The gate driver GD may include a scan driver and a light emitting signal driver. The scan driver may generate a scan signal in a row sequential manner to drive at least one scan line connected to each row of pixels and provide the scan signal to the scan line. The light emitting signal driver may generate a light emitting signal in a row sequential manner to drive at least one light emitting signal line connected to each row of pixels and provide the light emitting signal to the light emitting signal line.

[0049] The gate driver GD may generate a plurality of scanning signals and a plurality of light emitting signals. For example, the gate driver GD may generate a first scanning signal (eg, Figure 7 ), a first scanning signal Scan(N)), a second scanning signal (eg, Figure 7 The second scanning signal Scan(N-1)) and the light emitting signal (for example, Figure 7 The luminescence signal EM(N)).

[0050] According to an embodiment, the gate driver GD may be disposed on the display panel DP in a gate driver in panel (GIP) scheme. For example, a plurality of gate drivers GD may be divided and respectively disposed on at least two side surfaces of the display panel DP.

[0051] The display area AA of the display panel DP may include a plurality of pixel areas (or pixels, or pixel circuits) PA. The pixel area PA may include a plurality of data lines (eg, Figure 3 data lines DL) and a plurality of gate lines (eg, Figure 3 The pixel area PA includes a gate line GL, and a plurality of sub-pixels arranged in each intersection area. Each sub-pixel included in one pixel area PA can emit light of a different color. For example, the pixel area PA can use three sub-pixels to realize blue, red, and green. However, the present invention is not limited thereto, and in some cases, the pixel area PA may further include sub-pixels for further realizing a specific color (e.g., white).

[0052] In the pixel area PA, a region implementing blue may be referred to as a blue sub-pixel region, a region implementing red may be referred to as a red sub-pixel region, and a region implementing green may be referred to as a green sub-pixel region.

[0053] The non-display area BZ may be disposed along the periphery of the display area AA. Various components for driving a pixel circuit disposed in the pixel area PA may be disposed in the non-display area BZ. For example, at least a portion of a gate drive circuit GD may be disposed in the non-display area BZ. The non-display area BZ may be referred to as a border area.

[0054] Figure 3An example of a pixel circuit of a display device according to an embodiment of this specification is shown.

[0055] refer to Figure 3 In the display area AA, the display panel 10 includes a substrate SUB including sub-pixels PXL and an encapsulation layer ENCAP disposed on the substrate SUB. Each sub-pixel PXL includes a light emitting device ED, a driving transistor DT for driving the light emitting device ED, a scanning transistor SCT for transmitting a data voltage Vdata to a first node N1 of the driving transistor DT, a storage capacitor Cst for maintaining a constant voltage during one frame, and the like.

[0056] The driving transistor DT may include a first node N1 to which the data voltage Vdata is applied, a second node N2 electrically connected to the light emitting device ED, and a third node N3 to which the high potential common voltage ELVDD is applied from the driving voltage line PL. In the driving transistor DT, the first node N1 may be a gate node, the second node N2 may be a source node or a drain node, and the third node N3 may be a drain node or a source node.

[0057] The light emitting device ED may include an anode AE, a light emitting layer EL, and a cathode CE. The anode AE ​​may be a pixel electrode disposed in each subpixel PXL and may be electrically connected to the second node N2 of the driving transistor DT of each subpixel PXL. The cathode CE may be a common electrode commonly disposed in a plurality of subpixels PXL and may apply a low potential voltage ELVSS thereto.

[0058] For example, the anode AE ​​may be a pixel electrode, and the cathode CE may be a common electrode. Conversely, the anode AE ​​may be a common electrode, and the cathode CE may be a pixel electrode. Hereinafter, for ease of explanation, it is assumed that the anode AE ​​is a pixel electrode, and the cathode CE is a common electrode.

[0059] For example, the light emitting device ED may be an organic light emitting diode, an inorganic light emitting diode, a quantum dot light emitting device, etc. When the light emitting device ED is an organic light emitting diode, the light emitting layer EL of the light emitting device ED may include an organic light emitting layer including an organic material.

[0060] The scanning transistor SCT is turned on / off controlled by a scanning signal SCAN as a gate signal applied through the gate line GL. The scanning transistor SCT may switch an electrical connection between the first node N1 of the driving transistor DT and the data line DL.

[0061] The storage capacitor Cst may be electrically connected between the first node N1 and the second node N2 of the driving transistor DT.

[0062] According to an embodiment, each sub-pixel PXL may further include one or more transistors, or may further include one or more capacitors.

[0063] Each of the driving transistor DT and the scanning transistor SCT may be an n-type transistor or a p-type transistor.

[0064] In an embodiment, at least one of the driving transistor DT and the scanning transistor SCT uses an oxide semiconductor layer as an active layer. The oxide semiconductor layer is a layer made of an oxide semiconductor material and has an excellent leakage current blocking effect and a relatively low manufacturing cost compared to a transistor using a polycrystalline semiconductor layer. For example, the oxide semiconductor layer may include IGZO, ZnO, SnO 2 , Cu 2 O, NiO, ITZO and / or IAZO, and the configuration of this specification is not limited thereto.

[0065] Polycrystalline semiconductor materials (eg, transistors using a polycrystalline semiconductor layer including polycrystalline Si) have fast operating speed and excellent reliability. According to an embodiment, based on the advantages of the polycrystalline semiconductor layer, at least one of the driving transistor DT and the scanning transistor SCT may be manufactured using the polycrystalline semiconductor layer.

[0066] Figure 4 : is a view showing an implementation example of a display device according to an embodiment of the present specification.

[0067] refer to Figure 4 , the display device 400 may have multiple viewing angles. For example, the display device 400 may have a first range of viewing angles, a second range of viewing angles, and a third range of viewing angles. The display device 400 may allow a first screen 411 to be provided in the first range, a second screen 412 to be provided in the second range, and a third screen 413 to be provided in the third range.

[0068] In an embodiment, the first range may include a range corresponding to a driver's seat, and the second range may include a range corresponding to an area between the driver's seat and a passenger seat, for example, a front range. In addition, the third range may include a range corresponding to a passenger seat.

[0069] In an embodiment, the first screen 411, the second screen 412, and the third screen 413 may display different contents. However, the present invention is not limited thereto, and according to an embodiment, at least two screens may display the same contents.

[0070] The display device 400 may include a plurality of pixel sets. At least one of the plurality of pixel sets may include a first pixel that operates to correspond to a first range of viewing angles, a second pixel that operates to correspond to a second range of viewing angles, and a third pixel that operates to correspond to a third range of viewing angles. Each of the first pixel, the second pixel, and the third pixel may include a plurality of sub-pixels that emit different colors. Hereinafter, reference will be made to Figure 5 The first pixel set 450 including the first pixel, the second pixel, and the third pixel is described in more detail.

[0071] In an embodiment, the display device 400 may include a display area and a non-display area, the display area includes a plurality of pixel sets, and the non-display area is disposed adjacent to the display area. At least one of the plurality of pixel sets may include a first pixel, a second pixel, and a third pixel.

[0072] Figure 5 An example of a pixel set according to an embodiment of the present specification is shown. Figure 5 The pixel arrangement according to the embodiment of the present specification is shown to provide Figure 4 Different screens within different ranges shown.

[0073] refer to Figure 5 , the first pixel set 450 may include a first pixel 511, a second pixel 512, and a third pixel 513. Each pixel may include a plurality of sub-pixels. For example, each pixel may include a plurality of sub-pixels emitting different colors. For example, as shown in the figure, a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel may be included. In the following, it is assumed that the first color is red, the second color is green, and the third color is blue, but the present invention is not limited thereto.

[0074] In an embodiment, the first pixel 511 may be configured to provide a first range (eg, Figure 4 The first screen 411 can be displayed by providing light in the first range (for example, Figure 4 The second screen 412 can be displayed by providing light in the second range (for example, Figure 4 The third screen 413 is displayed using light in a third range).

[0075] In an embodiment, the first pixel 511 may include a first driving transistor, a first light emitting device, and at least one first light control device disposed on the first light emitting device. Figures 6 to 8 Reference may be made to the example in which at least one first light control device is disposed on the light emitting device. The first pixel 511 may control the viewing angle within a first range.

[0076] In an embodiment, the second pixel 512 may include a second driving transistor, a second light emitting device, and at least one second light control device disposed on the second light emitting device. Figures 6 to 8 Reference may be made to the example in which at least one second light control device is disposed on the light emitting device. The second pixel 512 may control the viewing angle within a second range.

[0077] In an embodiment, the third pixel 513 may include a third driving transistor, a third light emitting device, and at least one third light control device disposed on the third light emitting device. Figures 6 to 8 Reference may be made to an example in which at least one third light control device is disposed on a light emitting device. The third pixel 513 may control the viewing angle within a third range.

[0078] In an embodiment, a light control device for controlling the viewing angle may be provided on each sub-pixel. The light control device may have a different shape in each of the first pixel 511, the second pixel 512, and the third pixel 513. Figures 6 to 8 Identify more specific examples related to this.

[0079] Here, the light control device may refer to a tool that refracts light and then collects or diffuses the light. The light control device may include, for example, a lens, but is not limited thereto. Figure 6 The light control device may be implemented with the same material as the material of the planarization layer 625. For example, the light control device may be formed of at least one of acrylic resin, epoxy resin, phenolic resin, polyamide resin, unsaturated polyester resin, polyphenylene resin, polyphenylene sulfide resin, and benzocyclobutene, but is not limited thereto.

[0080] Figure 5 An example is shown in which the first pixel 511, the second pixel 512, and the third pixel 513 are arranged sequentially from left to right. However, the present invention is not limited thereto, and in some cases, the positions of the first pixel 511, the second pixel 512, and the third pixel 513 may be changed differently. For example, the first pixel 511, the third pixel 513, and the second pixel 512 may be arranged sequentially from right to left in this order.

[0081] In an embodiment, the cross-section of the sub-pixel included in each of the first pixel 511, the second pixel 512, and the third pixel 513 may be the same. Figures 6 to 8 , a cross section of the first color sub-pixel of each pixel is shown in more detail.

[0082] According to the embodiment, a pixel may be referred to as a region. For example, the first pixel 511 may be referred to as a first region, the second pixel 512 may be referred to as a second region, and the third pixel 513 may be referred to as a third region. The term "pixel" is only a term used to distinguish a light emitting region, and the embodiment is not limited to the term.

[0083] Figure 6 Shows Figure 5 Example of section AA'. Figure 6 A cross section of a sub-pixel emitting a first color is shown.

[0084] refer to Figure 6 , the first buffer layer 603 may be disposed on the substrate 601. The substrate 601 may be composed of at least one layer. The substrate 601 may have a flexible material. For example, the substrate 601 may be a plastic substrate. The first buffer layer 603 may be a multi-buffer layer including multiple layers. A shielding metal (or bottom shielding metal (BSM) 605) may be disposed on the first buffer layer 603. An active buffer layer 607 may be disposed on the shielding metal 605 and the first buffer layer 603.

[0085] The shielding metal 605 may be exposed through the contact hole. The connection electrode 609 may be connected to the shielding metal 605 through the contact hole. The insulating layer 613 may be disposed on the active buffer layer 607. The active layer 615 may be further disposed on the active buffer layer 607. The active layer 615 may constitute a channel of the transistor. The active layer 615 may be formed of, for example, silicon.

[0086] The first insulating layer 613 may include a contact hole exposing at least a portion of the active layer 615. The active layer 615 may be connected to the source / drain electrode 617 through the contact hole. The source / drain electrode 617 may correspond to a metal constituting a source electrode and / or a drain electrode of a transistor.

[0087] The connection electrode 609 may be connected to the source / drain electrode 617. In this case, the shield metal 605 may be electrically connected to the source / drain electrode 617 through the connection electrode 609. In an embodiment, a material forming the connection electrode 609 may correspond to a material forming the gate electrode 619. In this case, the connection electrode 609 may be formed by the same process as the gate electrode 619.

[0088] The gate electrode 619 may be disposed on the first insulating layer 613. The second insulating layer 621 may be disposed on the gate electrode 619. The second insulating layer 621 may be disposed on the gate electrode 619, the connecting electrode 609, and the first insulating layer 613. The second insulating layer 621 may include multiple layers. For example, the second insulating layer 621 may include a 2-1 insulating layer and a 2-2 insulating layer. In this case, the metal layer 623 may be disposed between the 2-1 insulating layer and the 2-2 insulating layer. The metal layer 623 may be disposed to overlap with the gate electrode 619. In this case, a capacitor may be formed based on the metal layer 623 and the gate electrode 619.

[0089] In an embodiment, the second insulating layer 621 may include a contact hole exposing at least a portion of the gate electrode 619 and / or the metal layer 623. The source / drain electrode 617 may be connected to the gate electrode 619 and / or the metal layer 623 through the contact hole.

[0090] The planarization layer 625 may be disposed on the source / drain electrode 617 and the second insulating layer 621. The planarization layer 625 may include a contact hole. The contact hole of the planarization layer 625 may expose at least a portion of the source / drain electrode. An anode 627 of the light emitting device may be disposed on the planarization layer 625. The anode 627 may also be disposed in the contact hole of the planarization layer 625. In this case, the anode 627 may be connected to the source / drain electrode 617 through the contact hole. A bank 629 may be disposed on at least a portion of the anode 627 and at least a portion of the planarization layer 625. The bank 629 may be disposed between the light emitting devices to divide the pixels.

[0091] In an embodiment, the gate electrode 619, the source / drain electrodes 617, and the active layer 615 may constitute a driving transistor. The anode 627, the light emitting layer 631, and the cathode 633 may be sequentially disposed on the driving transistor.

[0092] The light emitting layer 631 and the cathode 633 may be sequentially stacked on the anode 627. The ALD layer 635 may be disposed on the cathode 633. The ALD layer 635 may improve the reliability of the light emitting device. For example, the ALD layer 635 may improve the reliability by preventing gas and / or foreign matter that may be generated at high temperature from penetrating into at least a portion of the light emitting device. The encapsulation layer may be disposed on the ALD layer 635. The encapsulation layer may include a first encapsulation layer 637, a second encapsulation layer 639, and a third encapsulation layer 641. The encapsulation layer may correspond to Figure 3 Encapsulation layer ENCAP.

[0093] In an embodiment, an encapsulation layer and a buffer layer (eg, the second buffer layer 643 ) may be sequentially disposed on the cathode 633 .

[0094] The second buffer layer 643 may be disposed on the encapsulation layer. The touch electrode may be disposed on the second buffer layer 643. For example, the first touch electrode 647 and the first touch protection layer 645 may be disposed on the second buffer layer 643. The first touch protection layer 645 may be disposed to cover at least a portion of the first touch electrode 647. The first touch protection layer 645 may include a contact hole exposing at least a portion of the first touch electrode 647. The second touch electrode 649 may be disposed in the contact hole.

[0095] In an embodiment, the first touch electrode 647 may be a bridge electrode, and the second touch electrode 649 may be a sensor electrode. The second touch electrode 649 may be connected to the first touch electrode 647 by filling the contact hole.

[0096] According to an embodiment, the first barrier layer 651 may be provided to surround the upper surface and the side surface of the first touch protection layer 645 on the first touch electrode 647. The second barrier layer 652 may be spaced apart from the first barrier layer 651 and may be provided on the first touch protection layer 645. The first barrier layer 651 and the second barrier layer 652 may be implemented as a black pad layer to block light. In this case, light may pass between the first barrier layer 651 and the second barrier layer 652. For example, when the light emitting device (i.e., the anode 627, the light emitting layer 631, and the cathode 633) is provided below the first barrier layer 651 and the second barrier layer 652, light may be generated. The generated light may be emitted through the space between the first barrier layer 651 and the second barrier layer 652.

[0097] According to an embodiment, at least a portion of the first light control device may be disposed between the first barrier layer 651 and the second barrier layer 652. For example, as shown in the figure, at least a portion of the first light control device may be disposed to overlap on a region between the first barrier layer 651 and the second barrier layer 652.

[0098] In an embodiment, the first touch planarization layer 653 may be provided to surround the side surface and the upper portion of the first barrier layer 651 and the side surface and the upper portion of the second barrier layer 652, and a portion provided in the contact hole of the second touch electrode 649. At least a portion of the second touch electrode 649 may be provided on the upper surface of at least a portion of the first touch planarization layer 653. The second touch protection layer 655 may be provided on the upper portion of the second touch electrode 649 and the remaining area of ​​the first touch planarization layer 653.

[0099] The first light control device 657 may be disposed on the second touch protection layer 655. The first light control device 657 may be disposed between the first barrier layer 651 and the second barrier layer 652. For example, at least a portion of the first light control device 657 may be disposed between the first barrier layer 651 and the second barrier layer 652.

[0100] According to an embodiment, the second barrier layer 652 may cover another first touch electrode. In this case, the touch electrode on the second barrier layer 652 may also represent a portion of another second touch electrode.

[0101] In a plan view, the first light control device 657 may have a shape in which a portion of an elliptical shape is cut away. Figure 5 As shown, in a plan view, the first light control device 657 may have a shape in which a portion of the right side of an ellipse is cut off. That is, the cross section of the first light control device 657 may have a semi-ellipse shape.

[0102] One side of the first light control device 657 may have a cross section perpendicular to the substrate 601. In addition, the upper surface of the first light control device 657 from one side to the other side may have a curved shape. In addition, the first light control device 657 may have a shape in which the thickness gradually decreases from one side to the other side of the first light control device 657. In this case, the thickness of one side of the first light control device 657 may be thicker than the thickness of the other side of the first light control device 657.

[0103] In this case, the emission angle of light may be controlled corresponding to the shape of the light control device. For example, light may be emitted from one end of the first light control device 657 in the direction of a first angle θ1, and the first angle θ1 may be an angle formed by one end of the first light control device 657 and a central axis Y perpendicular to the substrate 601. In a range exceeding the first angle θ1, the emission of light may be limited.

[0104] The first light control device 657 can control the light to be emitted in a range of -90° or more and less than the first angle θ1. The light emission range may correspond to the first range. Here, the first angle θ1 may be, for example, +30°, but is not limited thereto, and may have a specific value corresponding to a range of, for example, 0° or more and less than +35°.

[0105] That is, reference Figure 6 , the angle range of light emitted from one side of the first light control device 657 may be smaller than the angle range of light emitted from the other side of the first light control device 657. Therefore, the user cannot visually recognize the light from one direction of the first light control device 657, and can only visually recognize the light from the other direction of the first light control device 657.

[0106] The second touch planarizing layer 659 may be disposed to cover the first light control device 657 and the second touch protection layer 655. Although not shown, an adhesive layer, a polarizing layer, and a cover glass may be further disposed on the second touch planarizing layer 659. For example, an adhesive layer, a polarizing layer, and a cover glass may be sequentially disposed on the second touch planarizing layer 659.

[0107] In some cases, a back plate and / or an aluminum plate may be further disposed below the substrate 601. For example, the back plate may be disposed on the aluminum plate, and the substrate 601 may be disposed on the back plate. The aluminum plate may be used to support the substrate 601 and the back plate and to dissipate heat from the substrate 601 and the back plate. The back plate may be used to support the substrate 601.

[0108] Figure 7 Shown along Figure 5 An example of a cross section taken along line BB'. Figure 7 Shows that when Figure 6 A cross section of the first light control device 657 when a light control device of a different type is disposed on the light emitting device. In this case, the light control device of a different type from the first light control device 657 may be a second light control device 757. Figure 7 The light emitting device emits a first color.

[0109] refer to Figure 7 , the second light control device 757 may be disposed on the touch protection layer 755. The second light control device 757 may be disposed to overlap with the region between the first barrier layer 751 and the second barrier layer 752. For example, at least a portion of the second light control device 757 may be disposed between the first barrier layer 751 and the second barrier layer 752. The first region 711 of the second light control device 757 may be disposed to overlap with the first barrier layer 751, and the second region 712 of the second light control device 757 may be disposed to overlap with the region between the first barrier layer 751 and the second barrier layer 752. The third region 713 of the second light control device 757 may be disposed to overlap with the second barrier layer 752.

[0110] In an embodiment, at least a portion of the first region 711 and the third region 713 may overlap with the touch electrode. In this case, a second light control device 757 may be provided to fully cover the area between the first barrier layer 751 and the second barrier layer 752, so that all light emitted by the light emitting device at the lower end can be controlled by the second light control device 757.

[0111] In a plan view, the second light control device 757 may have a shape in which both sides of an ellipse are cut off. For example, the second light control device 757 may have a shape in which both sides of a convex lens are vertically cut off. As another example, both sides of the second light control device 757 may have a first height, but the height of the second light control device 757 increases as it approaches the center. That is, the end of the first region 711 and the end of the third region 713 may have a cross section perpendicular to the substrate 601. In addition, the second region 712 may have a curved shape.

[0112] The light passing through the second light control device 757 may be emitted head-on. For example, the light passing through the second light control device 757 may be controlled not to be emitted to a portion of the left and right sides of the light control device. For another example, the light passing through the second light control device 757 may be controlled to be emitted within a range greater than or equal to the third angle θ3 and less than or equal to the second angle θ2 based on the central axis Y of the second light control device 757. For example, when the second angle θ2 is 30° and the third angle θ3 is 20°, light may be emitted within a range of -20° or greater and +30° or less. In some cases, the second angle θ2 or the third angle θ3 may have a specific value corresponding to a range greater than or equal to 0° and less than or equal to +35°.

[0113] In some cases, the second angle θ2 and the third angle θ3 may have the same value. For example, both the second angle θ2 and the third angle θ3 may be 30°. In this case, light may be emitted within a range of +30° or less and -30° or more. The range in which such light is emitted may be referred to as a second range.

[0114] That is, reference Figure 7 , the user cannot visually recognize light in both end directions of the second light control device 757 , and can visually recognize light only in the front direction of the second light control device 757 .

[0115] Figure 8 Shows Figure 5 Example of section C-C'. Figure 8 Shows that when Figure 6 The type of the first light control device 657 is different from the type of light control device when it is arranged on the cross section of the light emitting device. The light control device may be a third light control device 857 . Figure 8 The light emitting device emits a first color.

[0116] refer to Figure 8, the third light control device 857 may be disposed on the touch protection layer 875. The third light control device 857 may be disposed to overlap with the region between the first barrier layer 851 and the second barrier layer 852. For example, at least a portion of the third light control device 857 may be disposed between the first barrier layer 851 and the second barrier layer 852. A first region of the third light control device 857 may be disposed to overlap with the second barrier layer 852, and a second region of the third light control device 857 may be disposed to overlap with the region between the first barrier layer 851 and the second barrier layer 852.

[0117] In a plan view, the third light control device 857 may have a shape in which a portion of an ellipse is cut off. For example, in a plan view, the third light control device 857 may have a shape in which a portion of the left side of the ellipse is cut off. That is, the cross section of the third light control device 857 may have a semi-ellipse shape. In addition, in a plan view, the third light control device 857 may have a shape symmetrical to the first light control device 657.

[0118] One side of the third light control device 857 may have a cross section perpendicular to the substrate 601. In addition, the upper surface of the third light control device 857 from one side to the other side may have a curved shape. In addition, the third light control device 857 may have a shape in which the thickness gradually decreases from one side to the other end of the third light control device 857. In this case, the thickness of one side of the third light control device 857 may be thicker than the thickness of the other side of the third light control device 857.

[0119] In this case, the emission angle of light may be controlled corresponding to the shape of the light control device. For example, light may be emitted from one end of the third light control device 857 in the direction of the fourth angle -θ4, and the fourth angle θ4 may be an angle formed by one end of the third light control device 857 and the central axis Y perpendicular to the substrate 601. In the range exceeding the fourth angle -θ4, the emission of light may be limited.

[0120] The third light control device 857 can control the light to be emitted within a range of a fourth angle of -θ4 or greater and less than 90°. The light emitting range may correspond to the third range. Here, the fourth angle θ4 may be, for example, +30°, but is not limited thereto, and may have a specific value corresponding to a range of, for example, 0° or greater and less than +35°.

[0121] That is, reference Figure 8 , the angular range of light emitted from one side of the third light control device 857 may be smaller than the angular range of light emitted from the other side of the third light control device 857. Therefore, the user cannot visually recognize the light from one direction of the third light control device 857, and can only visually recognize the light from the other direction of the third light control device 857.

[0122] In an embodiment, a +emission angle may indicate that light is emitted in a first direction, and a −emission angle may indicate that light is emitted in a second direction opposite to the first direction.

[0123] Fig. 9 An example of a pixel set according to another embodiment of the present specification is shown. Fig. 9 The case where one sub-pixel includes a plurality of light control devices is shown.

[0124] refer to Fig. 9 , the first pixel set 450 may include a first pixel 911, a second pixel 912, and a third pixel 913. Each pixel may include a plurality of sub-pixels. For example, each pixel may include a plurality of sub-pixels emitting different colors. For example, as shown in the figure, a first color sub-pixel 921, a second color sub-pixel 922, and a third color sub-pixel 923 may be included. In the following, it is assumed that the first color is red, the second color is green, and the third color is blue, but the present invention is not limited thereto.

[0125] In an embodiment, a plurality of light control devices may be disposed on each sub-pixel. The light control devices may be disposed in various ways. For example, the light control devices may be disposed vertically like the first color sub-pixel 921. For another example, the light control devices may be disposed horizontally like the second color sub-pixel 922 and / or the third color sub-pixel 923. Figures 10 to 12 , a cross section of the second color sub-pixel 922 will be exemplarily described.

[0126] Fig.10 Shows Fig. 9 Example of cross section D-D'. Fig. 9 FIG. 4 shows a cross section when a plurality of first light control devices are arranged on a light emitting device emitting a second color. Figures 6 to 9 The content described is the same as the content.

[0127] refer to Fig.10 , a plurality of light control devices may be disposed on the light emitting device emitting the second color. For example, the 1-1 light control device 1051 and the 1-2 light control device 1052 may be disposed on the light emitting device. Here, the 1-1 light control device 1051 and the 1-2 light control device 1052 may be Figure 6 The first light control device 657 is a light control device of the same type. For example, the 1-1st light control device 1051 and the 1-2nd light control device 1052 may be configured to control light to be emitted within a first range.

[0128] In an embodiment, the 1-1st light control device 1051 may be spaced apart a predetermined distance from the 1-2nd light control device 1052. At least a portion of the touch electrode 1030 may be disposed between the 1-1st light control device 1051 and the 1-2nd light control device 1052. The touch protection layer 1035 may be disposed on the touch electrode 1030.

[0129] Fig.11 Shows Fig. 9 Example of section EE'. Fig.11 A cross section is shown when a plurality of second light control devices are disposed on a light emitting device emitting a second color.

[0130] refer to Fig.11 , a plurality of light control devices may be disposed on the light emitting device emitting the second color. For example, the 2-1st light control device 1151 and the 2-2nd light control device 1152 may be disposed on the light emitting device. Here, the 2-1st light control device 1151 and the 2-2nd light control device 1152 may be Figure 7 The second light control device 757 may be a light control device of the same type. For example, the 2-1st light control device 1151 and the 2-2nd light control device 1152 may be configured to control light to be emitted within the second range. The 2-1st light control device 1151 may be spaced apart from the 2-2nd light control device 1152 by a predetermined distance and may be disposed on the light emitting device.

[0131] Fig.12 Shows Fig. 9 Example of section F-F'. Fig.12 A cross section is shown when a plurality of third light control devices are disposed on a light emitting device emitting a second color.

[0132] refer to Fig.12 , a plurality of light control devices may be disposed on the light emitting device emitting the second color. For example, the 3-1st light control device 1251 and the 3-2nd light control device 1252 may be disposed on the light emitting device. Here, the 3-1st light control device 1251 and the 3-2nd light control device 1252 may be Figure 8 The third light control device 857 is a light control device of the same type. For example, the 3-1st light control device 1251 and the 3-2nd light control device 1252 may be configured to control light to be emitted within a third range. The 3-1st light control device 1251 and the 3-2nd light control device 1252 may be spaced apart from each other by a predetermined distance and may be disposed on the light emitting device.

[0133] Fig.13A and Fig. 13B An example of a pixel set according to another embodiment of the present specification is shown.

[0134] refer to Fig.13A , sub-pixels emitting light of different colors may be arranged in the first pixel set 1311. One sub-pixel in the first pixel set 1311 may be arranged for each luminous color, and the sub-pixel may include several types of lenses. For example, the first pixel set 1311 may include a first sub-pixel 1321, a second sub-pixel 1322, and a third sub-pixel 1323, wherein the first sub-pixel 1321 includes a first light-emitting device emitting a first color, the second sub-pixel 1322 includes a second light-emitting device emitting a second color, and the third sub-pixel 1323 includes a third light-emitting device emitting a third color.

[0135] A light control device having a different light emission range may be provided in each sub-pixel. For example, the second sub-pixel 1322 may include a first light control device 1331 that emits light within a first range, a second light control device 1332 that emits light within a second range, and a third light control device 1333 that emits light within a third range. In this case, the first light control device 1331, the second light control device 1332, and the third light control device 1333 may be provided on one light emitting device.

[0136] refer to Fig. 13B , sub-pixels emitting light of different colors may be arranged in the second pixel set 1312. One sub-pixel in the second pixel set 1312 may be arranged for each light control device. For example, if there are three types of light control devices regarding one color light emission, a sub-pixel may be provided for each type of light control device. For example, the 2-1st sub-pixel 1341, the 2-2nd sub-pixel 1342, and the 2-3rd sub-pixel 1343 may be arranged and emit a second color.

[0137] In an embodiment, different types of lenses may be provided in the 2-1st sub-pixel 1341, the 2-2nd sub-pixel 1342, and the 2-3rd sub-pixel 1343. For example, the first light control device 1331 may be provided in the 2-1st sub-pixel 1341. The second light control device 1332 may be provided in the 2-2nd sub-pixel 1342. The third light control device 1333 may be provided in the 2-3rd sub-pixel 1343. For more specific examples related to this, reference may also be made to Fig.14 Described is the section G-G'.

[0138] According to the present disclosure, the following advantageous effects can be obtained.

[0139] According to the present disclosure, a plurality of light conversion layers may be formed, so that light efficiency may be improved and reflectivity due to external light may be reduced.

[0140] It is obvious to those skilled in the art that the above disclosure is not limited by the above embodiments and drawings, and various substitutions, modifications and changes can be made in the disclosure without departing from the spirit or scope of the disclosure. Therefore, the scope of the disclosure is defined by the appended claims, and it is intended that all changes or modifications derived from the meaning, scope and equivalent concepts of the claims fall within the scope of the disclosure.

Claims

1. A display device, comprising: a substrate including a display area and a non-display area disposed adjacent to the display area, and a plurality of pixel sets, wherein the plurality of pixel sets are arranged on the substrate, wherein at least one of the plurality of pixel sets includes a first pixel that controls the viewing angle to a first range, a second pixel that controls the viewing angle to a second range, and a third pixel that controls the viewing angle to a third range, The first pixel includes a first driving transistor, a first light emitting device, and at least one first light control device disposed on the first light emitting device. The second pixel includes a second driving transistor, a second light emitting device, and at least one second light control device disposed on the second light emitting device, and The third pixel includes a third driving transistor, a third light emitting device, and at least one third light control device disposed on the third light emitting device.

2. The display device according to claim 1, wherein: The first light emitting device includes an anode, a light emitting layer and a cathode sequentially arranged on the first driving transistor, and The encapsulation layer and the buffer layer are sequentially arranged on the cathode.

3. The display device according to claim 2, further comprising a touch electrode and a touch protection layer disposed on the buffer layer, and A barrier layer overlaps the touch electrode, wherein the barrier layer includes a black matrix.

4. The display device according to claim 3, wherein: The touch protection layer is configured to cover at least a portion of the touch electrode, and The first light control device is disposed on the touch protection layer.

5. The display device according to claim 1, wherein: In a plan view, the first light control device and the third light control device have an elliptical shape with one side cut off, and In a plan view, the second light control device has a shape in which both sides of the elliptical shape are cut off.

6. The display device according to claim 5, wherein: The shape of the first light control device and the shape of the third light control device are symmetrical to each other in a plan view.

7. The display device according to claim 1, wherein: A cross section of one side of the first light control device and a cross section of one side of the third light control device have a semi-elliptical shape, and The cross-sections of both sides of the second light control device have a semi-elliptical shape.

8. The display device according to claim 7, wherein: A cross section of the one side of the first light control device and a cross section of the one side of the third light control device are perpendicular to the substrate, and Cross sections of two sides of the second light control device are perpendicular to the substrate.

9. The display device according to claim 1, wherein: The first pixel has one of the first light control devices.

10. The display device according to claim 1, wherein: The first pixel has two or more first light control devices spaced apart from each other.

11. The display device according to claim 1, wherein: The first light emitting device, the second light emitting device, and the third light emitting device emit light of the same color.

12. The display device according to claim 1, wherein: Each of the first pixel, the second pixel and the third pixel further includes an aluminum plate, a back plate and a multi-buffer layer, and The first pixel, the second pixel and the third pixel have the aluminum plate, the back plate and the multi-buffer layer in common.

13. The display device according to claim 1, wherein: The first range includes a direction of one side of the display area, The second range includes the center direction of the display area, and The third range includes a direction of another side of the display area opposite to the one side.

14. The display device according to claim 1, wherein: The first light control device is configured to control the viewing angle to the first range, The second light control device is configured to control the viewing angle to the second range, and The third light control device is configured to control the viewing angle to the third range.

15. A display panel, comprising: a display area, the display area comprising a plurality of pixel sets, and a non-display area, the non-display area being arranged adjacent to the display area, wherein at least one of the plurality of pixel sets includes a first pixel that controls the viewing angle to a first range, a second pixel that controls the viewing angle to a second range, and a third pixel that controls the viewing angle to a third range that is symmetrical to the first range, The first pixel includes a first driving transistor, a first light emitting device and at least one first light control device disposed on the first light emitting device. The second pixel includes a second driving transistor, a second light emitting device and at least one second light control device disposed on the second light emitting device, and The third pixel includes a third driving transistor, a third light emitting device, and at least one third light control device disposed on the third light emitting device, wherein the at least one third light control device has a shape symmetrical to that of the first light control device.

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