Display device

Abstract

A display device is provided. The display device includes a substrate in which a plurality of pixels are defined, each pixel including a plurality of sub-pixels. The display device further includes a plurality of light emitting diodes disposed in each of the plurality of sub-pixels and including a first light emitting diode and a second light emitting diode that emit light of the same color. The display device further includes a first bank spaced apart from the plurality of light emitting diodes to enclose the first light emitting diode and the second light emitting diode and including a black material. The display device further includes a second bank disposed on the first bank, disposed to enclose the second light emitting diode, and including a black material.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2024-0177330, filed on December 3, 2024, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. Technical Field

[0003] This disclosure relates to a display device, and more particularly to a display device with an adjustable viewing angle. Background Technology

[0004] With the technological advancements in modern society, display devices are used in various ways to provide information to users. This includes not only simple electronic signage that transmits visual information in one direction, but also a variety of electronic devices that require more advanced technology to examine user input and provide information in response to that input.

[0005] For example, display devices are included in vehicles to provide various information to the driver and passengers. However, the vehicle's display devices need to display content appropriately without interfering with the vehicle's operation. For instance, the display devices need to limit the display of content that might reduce the driver's attention while the vehicle is in operation. Summary of the Invention

[0006] The purpose of this disclosure is to provide a display device that can adjust the viewing angle by using a black partition.

[0007] Another objective of this disclosure is to provide a display device in which the viewing angle characteristics vary depending on the height of the black dam.

[0008] Another objective of this disclosure is to provide a display device in which spot recognition caused by viewing angle deviation is minimized.

[0009] The purpose of this disclosure is not limited to the objects mentioned above, and those skilled in the art will clearly understand from the following description other objects not mentioned above.

[0010] According to one aspect of this disclosure, a display device is provided. The display device includes a substrate defining a plurality of pixels, each pixel including a plurality of sub-pixels. The display device further includes a plurality of light-emitting diodes (LEDs) disposed in each of the plurality of sub-pixels, and including a first LED and a second LED emitting light of the same color. The display device further includes a first partition spaced apart from the plurality of LEDs to surround the first LED and the second LED, and comprising a black material. The display device further includes a second partition disposed on the first partition to surround the second LED, and comprising a black material.

[0011] According to another aspect of this disclosure, a display device is provided. The display device includes a substrate defining a plurality of pixels, each pixel including a plurality of sub-pixels. The display device further includes a plurality of light-emitting diodes (LEDs) disposed in each of the plurality of pixels, and includes a first LED and a second LED emitting light of the same color. The display device further includes a black barrier configured to surround the plurality of LEDs in each of the plurality of pixels. The plurality of sub-pixels include a first region in which the first LED is disposed and a second region in which the second LED emitting light of the same color as the first LED is disposed. The black barrier has different heights in the first and second regions, respectively.

[0012] Further details of the exemplary embodiments are included in the detailed description and accompanying drawings.

[0013] According to an exemplary embodiment of this disclosure, the viewing angle can be adjusted by utilizing a black embankment.

[0014] According to an exemplary embodiment of this disclosure, the height of the black embankment is adjusted to achieve various viewing modes.

[0015] According to exemplary embodiments of this disclosure, the process of placing a separate lens for adjusting the viewing angle is omitted in order to optimize the process by simplifying the process.

[0016] According to an exemplary embodiment of this disclosure, the black embankment is randomly set to minimize the identification of spots caused by viewing angle deviation.

[0017] The effects of this disclosure are not limited to those illustrated above, and many more effects are included in this specification. Attached Figure Description

[0018] The above and other aspects, features and advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1These are examples of display devices according to exemplary embodiments of the present disclosure;

[0020] Figure 2 This is a schematic diagram of a display device according to an exemplary embodiment of the present disclosure;

[0021] Figure 3 This is an enlarged plan view of the effective area of ​​a display device according to an exemplary embodiment of the present disclosure;

[0022] Figure 4A It is along Figure 3 A cross-sectional view taken from A-A';

[0023] Figure 4B It is along Figure 3 A cross-sectional view taken at B-B';

[0024] Figure 5 This is an enlarged plan view of a predetermined unit pixel of a display device according to an exemplary embodiment of the present disclosure;

[0025] Figure 6 It is a distribution map of the viewing angle of a predetermined unit pixel of a display device according to an exemplary embodiment of the present disclosure; and

[0026] Figure 7 This is a cross-sectional view of a sub-pixel of a display device according to another exemplary embodiment of the present disclosure. Detailed Implementation

[0027] The advantages and features of this disclosure, as well as the methods for implementing these advantages and features, will become clear from the exemplary embodiments described in detail below with reference to the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. The exemplary embodiments are provided by way of example only, so that those skilled in the art can fully understand the disclosure and scope of this disclosure.

[0028] The shapes, sizes, ratios, angles, quantities, etc., shown in the accompanying drawings used to describe exemplary embodiments of this disclosure are merely examples, and this disclosure is not limited thereto. Throughout the specification, the same reference numerals generally denote the same elements. Furthermore, in the following description of this disclosure, detailed explanations of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of this disclosure. Terms such as “comprising,” “having,” and “consisting of” as used herein are generally intended to allow for the addition of additional components, unless these terms are used in conjunction with the term “only.” Unless otherwise expressly stated, any reference to the singular may include the plural.

[0029] Even without explicit explanation, components are interpreted as including the normal tolerance range.

[0030] When using terms such as “on top of,” “above,” “below,” and “adjacent” to describe the positional relationship between two parts, one or more parts may be positioned between the two parts unless these terms are used in conjunction with the terms “immediately adjacent” or “directly.”

[0031] When one element or layer is placed "on" another element or layer, other layers or other elements can be directly inserted on or between the other element.

[0032] Although the terms "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from other components. Therefore, the first component mentioned below can be the second component in the technical concept of this disclosure.

[0033] Throughout the specification, the same reference numerals generally denote the same elements.

[0034] For ease of description, the size and thickness of each component shown in the accompanying drawings are illustrated, and this disclosure is not limited to the size and thickness of the components shown.

[0035] Features of the various embodiments of this disclosure may be combined or integrated with each other in part or in whole, and may be interlocked and operated in various technical ways, and the embodiments may be performed independently or in association with each other.

[0036] In the following, a display device according to exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0037] Figure 1 This is an example of a display device according to an exemplary embodiment of the present disclosure.

[0038] The display device 100 may be disposed in at least a portion of the vehicle's instrument panel DB. The vehicle's instrument panel DB includes configurations disposed on the front surface of the vehicle's front seats. For example, input configurations for operating various functions in the vehicle (e.g., air conditioning, audio system, or navigation system) may be configured on the vehicle's instrument panel DB.

[0039] The display device 100 may be disposed in front of the front passenger seat of the vehicle's dashboard DB. For example, the display device 100 may be a passenger-side display (CDD). Thus, the display device 100 according to an exemplary embodiment of the present disclosure is disposed on the vehicle's dashboard DB to provide convenience for passengers in the front passenger seat. For example, the display device 100 may provide information unrelated to vehicle operation, such as information about entertainment, such as dramas, movies, or music.

[0040] The display device 100 can be positioned to the side of the driver's seat. For example, the angle between the normal of the display device 100 and the driver of the driver's seat at the center of the display device 100 can be a first angle θ1. For example, when the vertical distance between the display device 100 and the driver is Y and the horizontal distance between the driver and the center of the display device 100 is X, tanθ1 = X / Y. That is, tanθ1 can be determined by the vertical distance between the display device 100 and the driver and the horizontal distance between the driver and the center of the display device 100. Therefore, tanθ1 can vary depending on the vehicle structure and typically has a value of 50 degrees or greater and 60 degrees or less.

[0041] The display device 100 can selectively provide images of itself to the driver depending on the mode. For example, in a first mode where the vehicle is stationary, the display device 100 can emit light toward the driver's seat with a viewing angle greater than a first angle θ1. For example, in the first mode, the display device 100 can emit light toward the driver's seat with a viewing angle of approximately 80°. Therefore, in the first mode, the driver and passenger can view the images of the display device 100 together.

[0042] Furthermore, in the second driving mode, the display device 100 can emit light with a viewing angle smaller than the first angle θ1 toward the driver's seat. For example, in the second mode, the display device 100 can emit light with a viewing angle of approximately 40° toward the driver's seat. Therefore, in the second mode, passengers can view the images on the display device 100, but the driver's viewing of the images on the display device 100 can be restricted.

[0043] Therefore, when the display device 100 is driven in the first mode while the vehicle is stationary, the driver and passengers can view the images on the display device 100 together. Furthermore, when the display device 100 is driven in the second mode while the vehicle is in motion, only the passengers can view the images on the display device 100 to ensure the safety of vehicle operation.

[0044] Figure 2 This is a schematic diagram of a display device according to exemplary embodiments of the present disclosure. Figure 2 For ease of description, only the display panel PN, gate driver GD, data driver DD, and timing controller TC are shown among the various components of the display device 100.

[0045] Reference Figure 2 The display device 100 includes a display panel PN and a timing controller TC. The display panel PN includes multiple sub-pixels SP, a gate driver GD and a data driver DD that supply various signals to the display panel PN, and the timing controller TC controls the gate driver GD and the data driver DD.

[0046] The gate driver GD supplies multiple scan signals to multiple scan lines SL based on multiple gate control signals supplied from the timing controller TC. Although in Figure 2 The diagram shows a gate driver GD positioned spaced apart from one side of the display panel PN, but the number of gate drivers GDs and their placement are not limited to this.

[0047] The data driver DD supplies data voltage to multiple data lines DL based on multiple data control signals and image data supplied from the timing controller TC. The data driver DD can use a reference gamma voltage to convert image data into data voltage and supply the converted data voltage to the multiple data lines DL.

[0048] The timing controller TC aligns externally input image data to supply the image data to the data driver DD. The timing controller TC can use externally input synchronization signals (such as dot clock signals, data enable signals, and horizontal / vertical synchronization signals) to generate gate control signals and data control signals. The timing controller TC supplies the generated gate control signals and data control signals to the gate driver GD and data driver DD, respectively, to control the gate driver GD and data driver DD.

[0049] A display panel PN is a configuration for displaying images to a user. The display panel PN may include a substrate defining a plurality of pixels, each pixel including a plurality of subpixels SP. In the display panel PN, a plurality of scan lines SL and a plurality of data lines DL intersect each other, and the plurality of subpixels SP may be formed at the intersections of the scan lines SL and the data lines DL.

[0050] In the display panel PN, the effective area AA and the ineffective area NA can be defined.

[0051] The effective area AA is the area in the display device 100 where an image is displayed. Within the effective area AA, multiple sub-pixels SP constituting multiple pixels PX and pixel circuitry for driving the multiple sub-pixels SP can be provided. The multiple sub-pixels SP are the smallest units constituting the effective area AA, and n sub-pixels SP can form one pixel PX. In each of the multiple sub-pixels SP, a thin-film transistor for driving multiple light-emitting diodes (LEDs) can be provided. Depending on the type of display panel PN, the multiple LEDs can be defined in different ways. For example, when the display panel PN is an inorganic light-emitting display panel PN, the LEDs can be light-emitting diodes (LEDs) or miniature light-emitting diodes (miniature LEDs).

[0052] Within the effective area AA, multiple signal lines are provided to transmit various signals to multiple sub-pixels SP. For example, the multiple signal lines may include multiple data lines DL supplying data voltage to each of the multiple sub-pixels SP and multiple scan lines SL supplying scan signals to each of the multiple sub-pixels SP. The multiple scan lines SL extend in one direction within the effective area AA to connect to the multiple sub-pixels SP, and the multiple data lines DL extend in a direction different from the stated direction within the effective area AA to connect to the multiple sub-pixels SP. Furthermore, low-potential power lines and high-potential power lines may be further provided within the effective area AA, but are not limited thereto.

[0053] The inactive region NA is the area where no image is displayed; therefore, the inactive region NA can be defined as the area extending from the active region AA. Within the inactive region NA, links can be provided to transmit signals to the sub-pixels SP, pad electrodes, or driver ICs (such as gate driver ICs or data driver ICs) of the active region AA.

[0054] Meanwhile, the ineffective area NA can be located on the rear surface of the display panel PN, that is, on the surface where sub-pixels SP are not set or can be omitted, and is not limited to what is shown in the figure.

[0055] Meanwhile, drivers such as gate driver GD, data driver DD, and timing controller TC can be connected to the display panel PN in various ways. For example, the gate driver GD can be installed in the non-active area NA as a gate in panel (GIP), or between multiple sub-pixels SP in the active area AA as a gate in active area (GIA).

[0056] For example, the data driver DD and the timing controller TC are formed in separate flexible films and printed circuit boards. The display panel PN can be electrically connected to the data driver DD and the timing controller TC by bonding the flexible film and the printed circuit board to pad electrodes formed in the inactive area NA of the display panel PN.

[0057] As another example, when the gate driver GD is mounted in the active area AA in a GIA configuration, and the side lines connecting the signal lines on the front surface of the display panel PN to the pad electrodes on the rear surface of the display panel PN are formed to bond the flexible film and printed circuit board to the rear surface of the display panel PN, the inactive area NA can be minimized on the front surface of the display panel PN. Therefore, when the gate driver GD, data driver DD, and timing controller TC are connected to the display panel PN as described above, a virtually bezel-less design can be achieved.

[0058] The display panel PN of the display device 100 according to an exemplary embodiment of the present disclosure will be described in more detail below.

[0059] Figure 3 This is an enlarged plan view of the effective area of ​​a display device according to an exemplary embodiment of the present disclosure.

[0060] Reference Figure 3 The display device 100 according to an exemplary embodiment of the present disclosure may include a plurality of pixels PX, each pixel PX including a plurality of subpixels SP. Each of the plurality of subpixels SP includes a plurality of light-emitting diodes and a plurality of pixel circuits for independently emitting light. A pixel PX may include one or more red subpixels SPR, one or more green subpixels SPG, and one or more blue subpixels SPB. The plurality of pixels PX may also include subpixels SP that emit light of other colors besides red subpixels SPR, green subpixels SPG, and blue subpixels SPB, but is not limited thereto.

[0061] In each of the plurality of pixels PX, a plurality of light-emitting diodes (LEDs) can be provided, including a first LED and a second LED emitting light of the same color. Specifically, in each of the plurality of sub-pixels SP, a plurality of LEDs can be provided, including a first LED LEDa and a second LED b emitting light of the same color. For example, in the red sub-pixel SPR, a first red LED 120a and a second red LED 120b emitting the same red light can be provided. In the green sub-pixel SPG, a first green LED 130a and a second green LED 130b emitting the same green light can be provided. In the blue sub-pixel SPB, a first blue LED 140a and a second blue LED 140b emitting the same blue light can be provided.

[0062] That is, the first light-emitting diode LEDa includes a first red light-emitting diode 120a, a first green light-emitting diode 130a, and a first blue light-emitting diode 140a. The second light-emitting diode LEDb includes a second red light-emitting diode 120b, a second green light-emitting diode 130b, and a second blue light-emitting diode 140b.

[0063] For example, light-emitting diodes (LEDs) are configured with first LEDa and second LEDb to drive the first LEDa and second LEDb in each sub-pixel SP. For example, the first LEDa and second LEDb can be connected to different transistors. Therefore, the transistors connected to the first LEDa and second LEDb are driven independently according to the mode of the display device 100, allowing for selective driving of the first LEDa and second LEDb.

[0064] At this time, the mode can be specified by user input or determined when predetermined conditions are met. For example, when a predetermined first condition is met, the first light-emitting diode LEDa can light up when a first mode signal is supplied. When a predetermined second condition is met, the second light-emitting diode LEDb can light up when a second mode signal is supplied. The first condition may include a condition pre-specified for driving in the first mode. The second condition may include a condition pre-specified for driving in the second mode. For example, the first condition may be a vehicle stopped state, and the second condition may be a vehicle being driven state. Therefore, the first light-emitting diode LEDa can be driven in the vehicle stopped state, and the second light-emitting diode LEDb can be driven in the vehicle being driven state. However, this disclosure is not limited to this, and both the first light-emitting diode LEDa and the second light-emitting diode LEDb can be driven in the vehicle stopped state.

[0065] The first light-emitting diode (LEDa) can be configured to allow light emitted from the first LEDa to have a wide viewing angle in both the driver's seat direction and the front passenger seat direction. Therefore, the light emitted from the first LEDa can be visible to both the driver and the passenger.

[0066] The second light-emitting diode (LEDb) can be configured to allow light emitted from the second LEDb to have a narrow viewing angle in the driver's seat direction and a wide viewing angle in the front passenger seat direction. Therefore, the light emitted from the second LEDb can be invisible to the driver but visible to the passenger.

[0067] like Figure 3 As shown, the area in which a first light-emitting diode LEDa is disposed in each sub-pixel SP can be defined as a first region A1, and the area in which a second light-emitting diode LEDb is disposed in each sub-pixel SP can be defined as a second region A2.

[0068] A black barrier BB can be set in each of multiple sub-pixels SP. The black barrier BB can be set to be aligned with a light-emitting diode (LED) (such as...). Figure 4A and4B The second red LED 120b, the second green LED 130b, the first blue LED 140a, and the second blue LED 140b shown are spaced apart and surround the LEDs. The black barrier BB can be configured to surround each of the plurality of sub-pixels SP to block the light emitted from each sub-pixel SP so as not to mix or interfere with it and to suppress external light reflection.

[0069] The black barrier BB is configured with a first black barrier BB1 and a second black barrier BB2. The first black barrier BB1 is spaced apart from a plurality of light-emitting diodes (LEDs) and is configured to surround the first LED a and the second LED b. The first black barrier BB1 may include a black material. The second black barrier BB2 is disposed on the first black barrier BB1 and is configured to surround the second LED b. The second black barrier BB2 may include a black material.

[0070] exist Figure 3 In order to distinguish the placement areas of the first black barrier BB1 and the second black barrier BB2, the first black barrier BB1 is shown in gray instead of black, and the second black barrier BB2 is shown in black.

[0071] The following will refer to Figure 4A and Figure 4B Describe in detail the viewing angles of the first light-emitting diode LEDa and the second light-emitting diode LEDb.

[0072] Using black barriers BB, including a first black barrier BB1 and a second black barrier BB2, the viewing angles of the first light-emitting diode LEDa and the second light-emitting diode LEDb can be limited. For example, the black barriers BB can be configured to have different heights in the first region A1 and the second region A2 to adjust the viewing angles of the first light-emitting diode LEDa and the second light-emitting diode LEDb. In this case, the configurations of the black barriers BB set in the first region A1, which requires a wide field of view, and the second region A2, which requires a narrow field of view, can be different. For example, refer to... Figure 4B A first black barrier BB1 is disposed in the first region A1 and the second region A2 to surround the first light-emitting diode LEDa and the second light-emitting diode LEDb. However, a second black barrier BB2 may be disposed only in the second region A2 to surround only the second light-emitting diode LEDb. Therefore, the black barrier BBs may have different heights in the first region A1 and the second region A2. The height of the black barrier BB disposed in the second region A2 may be greater than the height of the black barrier BB disposed in the first region A1.

[0073] At this point, the second light-emitting diode (LEDb) can be positioned at the same distance from the first black barrier BB1 and the second black barrier BB2. That is, the shortest horizontal distance (i.e., the shortest distance d1 on the plane) between the second LED and the first black barrier BB1 can be equal to the shortest horizontal distance (i.e., the shortest distance d2 on the plane) between the second LED and the second black barrier BB2. Therefore, the first black barrier BB1 and the second black barrier BB2 can restrict the viewing angle of the second LED.

[0074] In contrast, the second black barrier BB2 is configured to surround the second light-emitting diode LEDb, such that the second light-emitting diode BB2 is positioned closer to the first black barrier BB1 than the second black barrier BB2. That is, the shortest distance d3 in the plane between the first light-emitting diode LEDa and the second black barrier BB2 can be longer than the shortest distance d2 in the plane between the second light-emitting diode LEDb and the second black barrier BB2. Therefore, the viewing angle of the first light-emitting diode LEDa can be limited only by the first black barrier BB1.

[0075] Meanwhile, as the height of the black barrier BB increases, the viewing angle of the LED is limited, making the first region A1, where the height of the black barrier BB is relatively low, a wide field of view portion or wide field of view area. In contrast, the second region A2, where the height of the black barrier BB is relatively high, a narrow field of view portion or narrow field of view area, but not limited to this.

[0076] In the following text, reference will be made to Figure 4A and Figure 4B Describe the viewing angles of the black barrier BB, the first light-emitting diode LEDa, and the second light-emitting diode LEDb.

[0077] Figure 4A It is along Figure 3 The cross-sectional view taken from A-A'. Figure 4B It is along Figure 3 A cross-sectional view taken at point B-B'. Figure 4A and Figure 4B For ease of description, only the panel portion PP, the first light-emitting diode LEDa, the second light-emitting diode LEDb, the first black barrier BB1, and the second black barrier BB2 are shown.

[0078] Reference Figure 4A and Figure 4B A panel portion (PP) can be provided. The panel portion (PP) may include various components for driving light-emitting diodes (LEDs). For example, the panel portion (PP) may include a substrate supporting the various components including the LEDs, a driving transistor for driving the LEDs, and various insulating layers.

[0079] The first light-emitting diode LEDa and the second light-emitting diode LEDb can be disposed on the panel portion PP. Each of the first light-emitting diode LEDa and the second light-emitting diode LEDb can be a vertical light-emitting diode in which a first electrode, a first semiconductor layer, an emitting layer, a second semiconductor layer, and a second electrode are stacked in sequence, but is not limited thereto.

[0080] At the same time, Figure 4A and Figure 4B For ease of illustration, the panel portion PP is shown surrounding three surfaces other than the top surface of the light-emitting diode (LED), but this disclosure is not limited thereto. Therefore, the LED can be coupled with... Figure 4A and Figure 4B The different arrangements shown are set on the panel portion PP.

[0081] A black barrier BB can be set on the panel portion PP. The black barrier BB can be set to be spaced apart from the light-emitting diode (LED) to surround the LED. The black barrier BB is set to surround each of the multiple sub-pixels SP to block the light emitted from each sub-pixel SP so as not to be mixed or interfered with, and to suppress external light reflection.

[0082] The black barrier BB can limit the viewing angle of the first light-emitting diode LEDa and the second light-emitting diode LEDb. For example, the black barrier BB may include a first black barrier BB1 and a second black barrier BB2 disposed on the first black barrier BB1. In this case, the first black barrier BB1 can be configured to surround the first light-emitting diode LEDa and the second light-emitting diode LEDb, but the second black barrier BB2 can be configured to surround only the second light-emitting diode LEDb. Therefore, the viewing angle of the first light-emitting diode LEDa can be limited only by the first black barrier BB1, and the viewing angle of the second light-emitting diode LED can be limited by the first black barrier BB1 and the second black barrier BB2.

[0083] Specifically, the viewing angles of the first light-emitting diode LEDa and the second light-emitting diode LEDb can be determined by the distance between the first and second light-emitting diode LEDa and the black barrier BB, and the height of the black barrier BB. In this case, the viewing angle of the first and second light-emitting diode LEDa and the second light-emitting diode LEDb refers to the maximum angle between the light emitted from the first and second light-emitting diode LEDa and the normal to the display device 100. Therefore, the first and second light-emitting diode LEDa and the second light-emitting diode LEDb can have viewing angles within the maximum angle range. For example, when the viewing angle of the second light-emitting diode LEDb is θ2, the height of the first black barrier BB1 is h1, the height of the second black barrier BB2 is h2, and the distance between the center of the light-emitting diode LED and the end of the black barrier BB closer to the light-emitting diode LED is w, tanθ2 is w / (h1 + h2), such that the viewing angle θ2 of the second light-emitting diode LEDb can be tanθ2. -1 (w / (h1 + h2)).

[0084] refer to Figure 4B When the viewing angle of the first light-emitting diode LEDa is θ3, tanθ3 is w / h1, so that the viewing angle θ3 of the first light-emitting diode LEDa can be tanθ1 / h1. -1 (w / h1). Therefore, the viewing angle θ2 of the second light-emitting diode LEDb, which is located in a region where the height of the black barrier BB is relatively high, can be narrower than the viewing angle θ3 of the first light-emitting diode LEDa, which is located in a region where the height of the black barrier BB is relatively low.

[0085] For example, the width of a sub-pixel SP is assumed to be 50.7 μm. In this case, the center of the first light-emitting diode LEDa can be spaced about 10 μm apart from the end of the first black barrier BB1 by a distance w, and the center of the second light-emitting diode LEDb can be spaced about 10 μm apart from the ends of the first black barrier BB1 and the second black barrier BB2 by a distance w.

[0086] At this time, when the height of the black barrier BB is 12μm, for example, when the height h1 of the first black barrier BB1 is 2μm and the height h2 of the second black barrier BB2 is 10μm, or when the height h1 of the first black barrier BB1 is 1μm and the height h2 of the second black barrier BB2 is 11μm, the viewing angle θ3 of the first light-emitting diode LEDa can be about 80° or greater, and the viewing angle θ2 of the second light-emitting diode LED can be about 40° or less.

[0087] At this point, in order not to interfere with the viewing angle characteristics of the first light-emitting diode LEDa and the second black spacer BB2, the first light-emitting diode LEDa can be set to be spaced apart from the second black spacer BB2 by a predetermined distance. For example, assuming the first light-emitting diode LEDa (as shown in the image) Figure 4B The minimum distance between the first blue LED (LEDa) and the second black spacer BB2 shown is d. When the height of the first black spacer BB1 is 2 μm, d for implementing the first LEDa with a viewing angle of at least about 80° can be about 60 μm. That is, the first LEDa and the second black spacer BB2 can be set to be spaced at least 60 μm apart from each other, but this disclosure is not limited thereto.

[0088] Furthermore, the width of the second black barrier BB2 (i.e., the horizontal width l of the second black barrier BB2) can also be determined within a range that does not impede the viewing angle characteristics of the first light-emitting diode LEDa. In other words, the horizontal width l of the second black barrier BB2 can be designed with consideration of the viewing angle characteristics of the first light-emitting diode LEDa, but is not limited thereto.

[0089] At the same time, Figure 4A and Figure 4B The black dam BB is described as including a first black dam BB1 and a second black dam BB2, but this disclosure is not limited thereto, and the black dam BB can be formed in a single configuration, i.e., a single dam.

[0090] Figure 5 This is an enlarged plan view of a predetermined unit pixel PX' of a display device according to an exemplary embodiment of the present disclosure. Figure 6 This is a distribution diagram of the viewing angle of a predetermined unit pixel PX' of a display device according to an exemplary embodiment of the present disclosure. Figure 5 For ease of description, only the second region A2, in which a second light-emitting diode LEDb is disposed, is shown within a predetermined unit pixel PX', and the blue sub-pixel SPB is shown as an example. The planar diagrams of the red sub-pixel SPR and the green sub-pixel SPG can also be substantially the same as those of the blue sub-pixel SPB. Figure 6 In this paper, assuming a transfer tolerance of approximately ±2 μm for the LED, a viewing angle distribution of a predetermined unit pixel PX' of a black partition BB randomly set according to a uniform random function within the transfer error range is shown. Specifically, in the first case C1, the second LED b is transferred by offsetting 2 μm from the correct position R. In the second case C2, the second LED b is transferred to the correct position R. In the third case C3, the second LED b is transferred by offsetting +2 μm from the correct position R.

[0091] refer to Figure 5 The distance between the second black barrier BB2 and its adjacent pixel PX or sub-pixel SP, relative to the predetermined unit pixel PX', can not be constant but can be random. For example, as... Figure 5 As shown, a predetermined unit pixel PX' can be formed by 3 × 3 sub-pixels SP. However, the predetermined unit pixel PX' is not limited to this, and can be formed by 4 × 4 sub-pixels SP.

[0092] Specifically, as mentioned above, the viewing angle θ3 of the first light-emitting diode LEDa is tan -1 (w / h1), and the viewing angle θ2 of the second light-emitting diode LEDb is tan -1 The formula (w / (h1 + h2)) allows the viewing angle of a second light-emitting diode (LEDb) with a relatively narrow viewing angle to vary greatly depending on the spacing w. For example, due to the transfer tolerance of the LED, the LED may be set to be offset from the correct position R. In this case, a viewing angle deviation may occur when the spacing w has a deviation.

[0093] Furthermore, the driver and passenger positions are distinguished based on the horizontal rather than the vertical direction, which means that their field of vision may be affected by the horizontal rather than the vertical direction. Therefore, in Figure 3 and Figure 5 In the middle, assuming Figure 3 The direction B-B' corresponds to the driver / passenger's direction, and the LED is shifted to be offset vertically from the correct position R.

[0094] For example, when the first light-emitting diode LEDa is shifted to be offset from the correct position R within ±2 μm, a viewing angle deviation of ±1° may occur. In contrast, when the second light-emitting diode LEDb is shifted to be offset from the correct position R within ±2 μm, the viewing angle deviation may be relatively large, approximately ±5°. Such deviations may be perceived as spots by the user of the display device 100.

[0095] Therefore, the second black barrier BB2 can be randomly set by assuming a uniform random function within the transfer error range of the light-emitting diode (LED). That is, the second black barrier BB2 can be randomly set in one direction with a predetermined deviation relative to the average position in a predetermined unit pixel PX'. In this case, the average value of the deviation can converge to 0.

[0096] Specifically, the second black barrier BB2 is randomly set within a predetermined unit pixel PX', such that the shortest distance d2 on the plane between the second light-emitting diodes LEDb and the second black barrier BB2 within the predetermined unit pixel PX' can be different. Therefore, the viewing angles of the second light-emitting diodes LEDb within the predetermined unit pixel PX' can be distributed within various ranges. The viewing angles of the second light-emitting diodes LEDb can partially overlap with each other. That is, the viewing angles of the second light-emitting diodes LEDb within the predetermined unit pixel PX' can be continuously distributed. Therefore, the second black barrier BB2 can minimize the problem of identifying spots caused by viewing angle deviations between the second light-emitting diodes LEDb within the predetermined unit pixel PX'.

[0097] Specifically, refer to Figure 6 In the first scenario C1, the viewing angle of the second LEDb can be distributed within a range of approximately 27° or greater and 40° or less. In the second scenario C2, the viewing angle of the second LEDb can be distributed within a range of approximately 33° or greater and 45° or less. Therefore, the viewing angle of the second LEDb in the second scenario C2 can overlap with that of the second LEDb in the first scenario C1 within a range of 33° or greater and 40° or less. In the third scenario C3, the viewing angle of the second LED can be distributed within a range of approximately 40° or greater and 50° or less. Therefore, the viewing angle of the second LEDb in the third scenario C3 can overlap with that of the second LEDb in the second scenario C2 within a range of 40° or greater and 45° or less.

[0098] In other words, the viewing angle of the second light-emitting diode LEDb in the predetermined unit pixel PX' can be continuously distributed. Therefore, the problem of identifying spots caused by viewing angle deviations of the second light-emitting diode LEDb can be minimized.

[0099] A front passenger display can be positioned on the vehicle's dashboard in front of the front passenger seat to provide convenience for the passenger in that seat. For example, the front passenger display can provide information unrelated to vehicle operation, such as entertainment information like dramas, movies, or music. However, to ensure vehicle safety, the front passenger display needs to selectively provide images in the direction of the driver's seat. For example, the front passenger display can control the viewing angle to allow the driver and passenger to view the image together when the vehicle is stationary, and to control the viewing angle to allow only the passenger to view the image when the vehicle is in motion. For example, the front passenger display needs to control the viewing angle to provide different viewing angles when the vehicle is stationary and when the vehicle is in motion.

[0100] In the display device 100 according to an exemplary embodiment of the present disclosure, in each of a plurality of sub-pixels SP, a first light-emitting diode LEDa and a second light-emitting diode LEDb can be selectively driven. Specifically, each sub-pixel SP may include a first region A1 in which the first light-emitting diode LEDa is disposed and a second region A2 in which the second light-emitting diode LEDb is disposed. At this time, the height of the black barrier BB in the first region A1 and the second region A2 is adjusted differently to adjust the viewing angle of the first light-emitting diode LEDa and the second light-emitting diode LEDb. For example, the first region A1 in which the first light-emitting diode LEDa is disposed requires a wide field of view, and only the first black barrier BB1 can be disposed in the first region A1. Furthermore, the second region A2 in which the second light-emitting diode LEDb is disposed requires a narrow field of view, and not only the first black barrier BB1, but also the second black barrier BB2 can be disposed in the second region A2. That is, in the first region A1, the black barrier BB is set relatively low to achieve a wide viewing angle, while in the second region A2, the black barrier BB is set relatively high to achieve a narrow viewing angle. Therefore, in the display device 100 according to an exemplary embodiment of the present disclosure, the height of the black dam BB is adjusted to selectively have a narrow viewing angle in a specific area.

[0101] Furthermore, in the display device 100 according to an exemplary embodiment of the present disclosure, the viewing angle of the first light-emitting diode LEDa and the second light-emitting diode LEDb can be controlled using only the black barrier BB. Therefore, in the display device 100 according to an exemplary embodiment of the present disclosure, a separate component for controlling the viewing angle is not required, thereby reducing the manufacturing process of the display device 100 and reducing manufacturing and product costs.

[0102] Specifically, in the display device 100 according to an exemplary embodiment of the present disclosure, a second black barrier BB2 can be randomly disposed in a second region A2 that achieves a narrow viewing angle. For example, the second black barrier BB2 can be randomly disposed by assuming a uniform random function within the transfer error range of the light-emitting diodes (LEDs) relative to a predetermined unit pixel PX'. Therefore, the shortest distance between the second LEDs (LEDb) disposed in the predetermined unit pixel PX' and the second black barrier BB2 can be different. Therefore, the viewing angles of the second LEDs (LEDb) disposed in the corresponding pixel PX can be distributed within various ranges. Therefore, the viewing angles of the second LEDs (LEDb) can partially overlap with each other. That is, the viewing angles of the second LEDs (LEDb) disposed in the predetermined unit pixel PX' can be continuously distributed. Therefore, even if the second LEDs (LEDb) shift from the correct position due to transfer error, the problem of spotting caused by viewing angle deviation between the second LEDs (LEDb) can be minimized. Therefore, the display quality of the display device 100 according to an exemplary embodiment of the present disclosure can be improved.

[0103] Figure 7 This is a cross-sectional view of a sub-pixel of a display device according to another exemplary embodiment of the present disclosure, and is along... Figure 3 A cross-sectional view of another exemplary embodiment taken from A-A'. Figure 7 The display device 200 and Figures 1 to 6 The only difference between the display devices 100 is the black partition BB, while the other components are basically the same, so redundant descriptions will be omitted.

[0104] Reference Figure 7 The width of the second black barrier BB2 can be narrower than the width of the first black barrier BB1. Therefore, the second black barrier BB2 can expose at least a portion of the first black barrier BB1. That is, the ends of the first black barrier BB1 and the ends of the second black barrier BB2 can be located on different planes.

[0105] Therefore, the second light-emitting diode LEDb can be positioned closer to the first black spacer BB1 than the second black spacer BB2. In other words, the distance w' between the second light-emitting diode LEDa and the second black spacer BB2 can be greater than the distance w between the second light-emitting diode LEDb and the first black spacer BB1. Therefore, the shortest distance d2 on the plane between the second light-emitting diode LEDa and the second black spacer BB2 can be longer than the shortest distance d1 on the plane between the second light-emitting diode LEDb and the first black spacer BB1.

[0106] For example, when the width of the second black barrier BB2 is equal to the width of the first black barrier BB1, due to manufacturing errors, the second black barrier BB2 protrudes from the first black barrier BB1. In this case, the spacing w' between the second LED a and the second black barrier BB2 may vary, potentially causing a viewing angle deviation between the second LEDs LEDb. Therefore, the width of the second black barrier BB2 is made smaller than the width of the first black barrier BB1, so that the second black barrier BB2 does not protrude from the first black barrier BB1. Thus, the error in the spacing w' between the second LEDs LEDb and the second black barrier BB2 is minimized, thereby minimizing the viewing angle deviation caused by the second LEDs LEDb.

[0107] In a display device 200 according to another exemplary embodiment of the present disclosure, a first light-emitting diode LEDa and a second light-emitting diode LEDb, which are selectively driven, can be disposed in a sub-pixel SP. In this case, in a first region A1 where the first light-emitting diode LEDa is disposed, only a first black barrier BB1 can be disposed, and in a second region A2 where the second light-emitting diode LEDb is disposed, both the first black barrier BB1 and the second black barrier BB2 can be disposed. That is, in the first region A1, the black barrier BB is set relatively low to achieve a wide viewing angle, while in the second region A2, the black barrier BB is set relatively high to achieve a narrow viewing angle. Therefore, in the display device 200 according to another exemplary embodiment of the present disclosure, the height of the black barrier BB is adjusted to selectively have a narrow viewing angle in a specific region.

[0108] Furthermore, in a display device 200 according to another exemplary embodiment of the present disclosure, the viewing angles of the first light-emitting diode LEDa and the second light-emitting diode LEDb can be controlled using only the black barrier BB. Therefore, in the display device 200 according to another exemplary embodiment of the present disclosure, a separate component for controlling the viewing angle is not required, thus simplifying the manufacturing process of the display device 200 and saving costs.

[0109] Specifically, in a display device 200 according to another exemplary embodiment of the present disclosure, in the second region A2 that achieves a narrow viewing angle, the distance between the second black barrier BB2 and the adjacent pixel PX or sub-pixel SP may not be constant, but may be random. For example, the second black barrier BB2 can be randomly set by assuming a uniform random function within the transfer error range of the light-emitting diode (LED) relative to a predetermined unit pixel PX'. Therefore, the viewing angles of the second LEDs LEDb disposed in the corresponding pixel PX can be distributed within various ranges. Therefore, the viewing angles of the second LEDs LEDb can partially overlap with each other. That is, the viewing angles of the second LEDs LEDb disposed in the predetermined unit pixel PX' can be continuously distributed. Therefore, even if the second LEDs LEDb are offset from the correct position R due to transfer error, the problem of spotting caused by the viewing angle deviation between the second LEDs LEDb can be minimized. Therefore, the display quality of the display device 200 according to another exemplary embodiment of the present disclosure can be improved.

[0110] Specifically, such as Figure 7 As shown, in a display device 200 according to another exemplary embodiment of the present disclosure, the width of the second black barrier BB2 can be formed to be smaller than the width of the first black barrier BB1. Therefore, the second black barrier BB2 can be configured not to protrude from the first black barrier BB1. Thus, errors occurring in the spacing w' between the second light-emitting diodes LEDb and the second black barrier BB2 can be minimized. That is, in the display device 200 according to another example of the present disclosure, viewing angle deviations between the second light-emitting diodes LEDb due to process errors occurring during the formation of the black barrier BB can be minimized. As a result, the problem of spots caused by viewing angle deviations can be minimized.

[0111] Exemplary embodiments of this disclosure can also be described as follows:

[0112] According to one aspect of this disclosure, a display device is provided. The display device includes a substrate defining a plurality of pixels, each pixel including a plurality of sub-pixels. The display device further includes a plurality of light-emitting diodes (LEDs) disposed in each of the plurality of sub-pixels, and including a first LED and a second LED emitting light of the same color. The display device further includes a first partition spaced apart from the plurality of LEDs to surround the first LED and the second LED, and comprising a black material. The display device further includes a second partition spaced on the first partition spacer to surround the second LED, and comprising a black material.

[0113] In each of the multiple sub-pixels, a first light-emitting diode and a second light-emitting diode can be selectively driven.

[0114] The second dike can be randomly set in one direction with a predetermined deviation relative to the average position within a predetermined unit pixel.

[0115] The predetermined unit pixel can be 3 × 3 or 4 × 4 sub-pixel units.

[0116] Within a given unit pixel, the average deviation can converge to 0.

[0117] The viewing angles of the second light-emitting diodes positioned in a predetermined unit pixel can at least partially overlap with each other.

[0118] The shortest distance on the plane between the first LED and the second barrier can be longer than the shortest distance on the plane between the second LED and the second barrier.

[0119] The shortest distance on the plane between the second LED and the first barrier can be equal to the shortest distance on the plane between the second LED and the second barrier.

[0120] The shortest distance on the plane between the second LED and the second barrier can be longer than the shortest distance on the plane between the second LED and the first barrier.

[0121] The second dike can expose at least a portion of the first dike.

[0122] According to another aspect of this disclosure, a display device is provided. The display device includes a substrate defining a plurality of pixels, each pixel including a plurality of sub-pixels. The display device further includes a plurality of light-emitting diodes (LEDs) disposed in each of the plurality of pixels, and includes a first LED and a second LED emitting light of the same color. The display device further includes a black barrier configured to surround the plurality of LEDs in each of the plurality of pixels. The plurality of sub-pixels include a first region in which the first LED is disposed and a second region in which the second LED emitting light of the same color as the first LED is disposed. The black barrier has different heights in the first and second regions, respectively.

[0123] The height of the black dike set in the second area can be higher than the height of the black dike set in the first area.

[0124] The black dike may include a first black dike set in a first region and a second region, and a second black dike set on the first black dike in the second region.

[0125] The second black barrier can be randomly set within a predetermined unit pixel.

[0126] The shortest distance on the plane between the second light-emitting diode and the second black barrier, which are set in a predetermined unit pixel, can be different.

[0127] The second light-emitting diode can be configured to be spaced apart from the first and second black barriers at the same distance.

[0128] The second light-emitting diode can be configured to be closer to the first black barrier than the second black barrier.

[0129] Although exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be embodied in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are illustrative in all respects and do not limit the present disclosure.

Claims

1. A display device, comprising: A substrate, wherein a plurality of pixels are defined therein, and each pixel includes a plurality of sub-pixels; A plurality of light-emitting diodes are disposed in each of the plurality of sub-pixels, and include a first light-emitting diode and a second light-emitting diode that emit light of the same color; A first barrier, which is spaced apart from the plurality of light-emitting diodes and configured to surround the first light-emitting diode and the second light-emitting diode, the first barrier comprising a black material; as well as A second barrier is disposed on the first barrier and configured to surround the second light-emitting diode, the second barrier comprising the black material.

2. The display device according to claim 1, wherein, In each of the plurality of sub-pixels, the first light-emitting diode and the second light-emitting diode are configured to be selectively driven.

3. The display device according to claim 1, wherein, The second dike is randomly set in one direction with a predetermined deviation relative to the average position within a predetermined unit pixel.

4. The display device according to claim 3, wherein, The predetermined unit pixel is 3 × 3 or 4 × 4 sub-pixel units.

5. The display device according to claim 3, wherein, Within the predetermined unit pixel, the average value of the deviation converges to 0.

6. The display device according to claim 3, wherein, The viewing angles of the second light-emitting diodes disposed in the predetermined unit pixel at least partially overlap with each other.

7. The display device according to claim 1, wherein, The shortest distance on the plane between the first light-emitting diode and the second barrier is longer than the shortest distance on the plane between the second light-emitting diode and the second barrier.

8. The display device according to claim 1, wherein, The shortest distance on the plane between the second LED and the first barrier is equal to the shortest distance on the plane between the second LED and the second barrier.

9. The display device according to claim 1, wherein, The shortest distance on the plane between the second light-emitting diode and the second barrier is longer than the shortest distance on the plane between the second light-emitting diode and the first barrier.

10. The display device according to claim 9, wherein, The second dike is configured to expose at least a portion of the first dike.

11. A display device, comprising: A substrate, wherein a plurality of pixels are defined therein, the pixels including a plurality of sub-pixels; A plurality of light-emitting diodes are disposed in each of the plurality of pixels, and include a first light-emitting diode and a second light-emitting diode that emit light of the same color; as well as A black barrier, wherein the black barrier is configured in each of the plurality of pixels to surround the plurality of light-emitting diodes. The plurality of sub-pixels include: A first region, wherein the first light-emitting diode is disposed in the first region; and In the second region, a second light-emitting diode emitting the same color light as the first light-emitting diode is disposed in the second region, and The black dike has different heights in the first region and the second region, respectively.

12. The display device according to claim 11, wherein, The height of the black dike located in the second region is higher than the height of the black dike located in the first region.

13. The display device according to claim 11, wherein, The black dike includes: A first black dike is set in the first area and the second area; and A second black dam is set on the first black dam in the second region.

14. The display device according to claim 13, wherein, The second black barrier is randomly set in a predetermined unit pixel.

15. The display device according to claim 14, wherein, The shortest distance on the plane between the second light-emitting diode and the second black barrier, which are located in the predetermined unit pixel, is different.

16. The display device according to claim 13, wherein, The second light-emitting diode is configured to be spaced apart from the first black barrier and the second black barrier at the same distance.

17. The display device according to claim 13, wherein, The second light-emitting diode is positioned closer to the first black barrier than the second black barrier.

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