Display device and method for controlling same

Abstract

The present disclosure relates to a display device. The display device comprises: a substrate; and a plurality of pixels disposed on the substrate and each including a plurality of sub-pixels. The plurality of sub-pixels includes one red pixel, one green pixel, a first blue pixel emitting light at a predetermined gradation or higher, and a second blue pixel emitting light at a gradation lower than the predetermined gradation.

Description

Display device and control method thereof

[0001] The present disclosure relates to a display device and a method for controlling the same, and more specifically, to a display device comprising a plurality of pixels and a method for controlling the same.

[0002] A display device is a device that displays video signals. For example, display devices include various electronic products such as TVs, mobile phones, PCs, laptop PCs, PDAs, etc.

[0003] As user needs become more diverse, continuous efforts have recently been made to develop large-screen, high-resolution display devices. For example, devices equipped with QLED (Quantum dot Light Emitting Diodes) displays utilizing QD (Quantum Dot) are also being developed.

[0004] These conventional display devices used pixels containing cadmium (Cd). However, cadmium is known to be a highly toxic heavy metal that pollutes air, soil, and water. Considering this problem, technology was introduced to manufacture cadmium-free QLED display devices; however, this structure had issues such as difficulty in achieving brightness levels above a certain threshold and reduced durability.

[0005] Embodiments of the present disclosure may solve at least one of the previously described problems and / or disadvantages and provide the advantages described below. Accordingly, various embodiments of the present disclosure provide a display device comprising a plurality of pixels and a method for controlling the same.

[0006] Additional embodiments will be presented in the detailed description below, some of which are obvious from the detailed description, and other embodiments can also be presented through learning from the presented embodiments.

[0007] A display device according to at least one embodiment of the present disclosure comprises a substrate and a plurality of pixels disposed on the substrate, each including a plurality of subpixels. The plurality of subpixels includes one red pixel, one green pixel, a first blue pixel emitting light at a predetermined grayscale level or higher, and a second blue pixel emitting light at a predetermined grayscale level or lower.

[0008] The above description of embodiments of the present disclosure, as well as other aspects, features, and benefits, will become more apparent from the following description with reference to the accompanying drawings. In the accompanying drawings:

[0009] FIG. 1 is a drawing for explaining a display device according to at least one embodiment of the present disclosure.

[0010] FIG. 2 is a drawing showing a substrate according to at least one embodiment of the present disclosure.

[0011] FIG. 3 is a drawing for explaining the operation of a display device according to at least one embodiment of the present disclosure.

[0012] FIG. 4 is a schematic cross-sectional view of a plurality of pixels of a display device according to at least one embodiment of the present disclosure.

[0013] FIG. 5 is a drawing showing a plurality of pixels according to at least one embodiment of the present disclosure.

[0014] FIG. 6 is a drawing showing a plurality of pixels according to at least one embodiment of the present disclosure.

[0015] FIG. 7 is a drawing showing a plurality of pixels according to at least one embodiment of the present disclosure.

[0016] FIG. 8 is a drawing showing a plurality of pixels according to at least one embodiment of the present disclosure.

[0017] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0018] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0019] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0020] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0021] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0022] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0023] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0024] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0025] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0026] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0027] In the embodiment, the 'module' or multiple 'parts' may be integrated into at least one module and implemented by at least one processor, except for the 'module' or 'part' that needs to be implemented in specific hardware.

[0028] Operations performed by a module, program, or other component according to various embodiments may be executed sequentially, in parallel, iteratively, or heuristically, or at least some operations may be executed in a different order, omitted, or other operations may be added.

[0029] Meanwhile, the various elements and areas in the drawings are depicted schematically. Accordingly, the technical concept of the present invention is not limited by the relative sizes or spacing depicted in the attached drawings.

[0030] Below, a display device (1) according to various embodiments is described in detail with reference to the drawings.

[0031] FIG. 1 is a drawing showing a display device (1) according to at least one embodiment of the present disclosure.

[0032] In the present disclosure, the display device (1) is a general term for an electronic device including a display module (100). For example, the display device (1) can be various devices such as a mobile phone, a tablet PC, a laptop PC, a TV, a monitor, etc.

[0033] The display module (100) is configured to output various screens. The display module (100) may include various types of light-emitting elements. In various examples of the present disclosure, the description is based on the case in which the display module (100) includes a self-emissive element that is an EL-QD (Electroluminescent Quantum Dot).

[0034] EL-QD (Electroluminescent Quantum Dot) refers to a self-emissive device in which the quantum dot itself emits light upon receiving an electrical signal. In other words, unlike LCDs or standard QLEDs that require a separate backlight, EL-QDs can generate light directly from the device itself.

[0035] Referring to FIG. 1, the display device (1) may include a display module (100) and a processor (40).

[0036] The display module (100) includes a substrate (1000) and a display driver integrated circuit (70) for controlling the driving of a plurality of light-emitting diodes provided on the substrate (1000). The display driver IC includes a gate driver IC and a source driver IC. The gate driver IC performs the role of turning on or off each LED, i.e., subpixel, mounted on the substrate (1000), and the source driver IC performs the role of determining the gradation of the color to be expressed by each subpixel. The electrical signal applied by each driver IC is transmitted to a TFT for driving each subpixel within the display module (100), so that each subpixel can be driven.

[0037] The display driver IC (70) may include a memory (71) and a switching circuit (72). The memory (71) may store various data, programs, instructions, etc. required for the operation of the display driver IC (70). For example, the memory (71) may store information regarding reference grayscale values ​​used for distinguishing blue pixels in various embodiments of the present disclosure.

[0038] The switching circuit (72) is a control circuit for selectively emitting one of a plurality of different blue pixels based on a reference grayscale value stored in memory (71) and an input grayscale value. Although it is illustrated in FIG. 1 as a circuit embedded within the display driver IC (70), it is not necessarily limited thereto; the switching circuit (72) may be implemented as a circuit separately provided outside the display driver IC (70) or embedded in various other chips. The operation of the switching circuit (72) will be explained in detail in the following section.

[0039] For convenience of explanation, FIG. 1 is illustrated as if it includes only one display module (100), but if the display device (1) is a device equipped with a large display, it may be used in a form where multiple display modules (100) are connected to each other.

[0040] The processor (40) is configured to control the operation of the display device (1). In FIG. 1, the processor (40) is depicted as being independent of the display module (100) within the display device (1), but is not necessarily limited thereto, and the processor (40) may be embedded in the display module (100).

[0041] The processor (40) may be implemented as a digital signal processor (DSP) that processes digital video signals, a microprocessor, a graphics processing unit (GPU), an artificial intelligence (AI) processor, a neural processing unit (NPU), or a time controller (TCON). The processor (40) is not limited thereto and may include or be defined by one or more of a central processing unit (CPU), a micro controller unit (MCU), a micro processing unit (MPU), a controller, an application processor (AP), a communication processor (CP), or an ARM processor. The processor (40) may be implemented as a system on chip (SoC) or large scale integration (LSI) with a built-in processing algorithm, or may be implemented in the form of an application-specific integrated circuit (ASIC) or field programmable gate array (FPGA).

[0042] The processor (40) can control hardware or software components connected to the processor (40) by running an operating system or application, and can perform various data processing and operations. Additionally, the processor (40) can load instructions or data received from at least one of the other components into volatile memory for processing, and store various data in non-volatile memory. For this operation, volatile memory, non-volatile memory, etc., may be further included in the display device (1) either integrally with or separately from the processor (40). Various programs, data, and instructions necessary for the operation of the display device (1) may be stored in at least one of the memories.

[0043] The display driver IC (70) may receive, for example, image data or an image control signal for controlling image data through the processor (40). For example, the image control signal may be received from the processor (40) (e.g., an application processor), but is not limited thereto, and may be received from an auxiliary processor (e.g., a graphics processing unit) that operates independently of the functions of the processor (40). As an example, the display driver IC (70) may receive an image frame generated by decoding from a video decoder provided in the display device (1) or other source device.

[0044] Although not shown in FIG. 1, the display module (100) or display driver IC (70) may further include an image processing module or a mapping module.

[0045] An image processing module (not shown) is configured to perform preprocessing or postprocessing (e.g., resolution, brightness, or size adjustment) on at least a portion of the stored image data based on the characteristics of the image data or the characteristics of the substrate (1000).

[0046] A mapping module (not shown) is configured to generate voltage or current values ​​corresponding to image data that has been pre-processed or post-processed through an image processing module. According to one embodiment, the generation of voltage or current values ​​may be performed, for example, based on at least some of the attributes of the pixels of the substrate (1000) (e.g., array of pixels (RGB stripe, RGBB stripe, or pentile structure)) or the size of each of the subpixels.

[0047] At least some pixels of the substrate (1000) are driven by voltage values ​​or current values ​​generated by a mapping module to display visual information (e.g., text, image, or icon) corresponding to image data.

[0048] Based on image information received from the processor (40), a driving signal (e.g., driver driving signal, gate driving signal, etc.) can be transmitted to the substrate (1000), i.e., the display.

[0049] According to one embodiment of the present disclosure, the display module (100) may further include a touch circuit. The touch circuit may include a touch sensor and a touch sensor IC for controlling the same. The touch sensor IC may control the touch sensor to detect, for example, a touch input or hovering input for a designated location on the substrate (1000). For example, the touch sensor IC may detect a touch input or hovering input by measuring a change in a signal (e.g., voltage, light intensity, resistance, or charge) for a designated location on the substrate (1000). The touch sensor IC may provide information (e.g., location, area, pressure, or time) regarding the detected touch input or hovering input to the processor (40). According to one embodiment, at least a part of the touch circuit (e.g., the touch sensor IC) may be included as part of the display driver IC (70), or as part of the substrate (1000), or as part of another component (e.g., an auxiliary processor) placed outside the display module (100).

[0050] According to one embodiment of the present disclosure, the pixel driving method of the display module (100) may be an active matrix (AM) driving method or a passive matrix (PM) driving method.

[0051] The substrate (1000) of the display module (100) may be divided into an active region and an inactive region. The active region may correspond to the region occupied by the TFT layer of the substrate (1000), and the inactive region may be the region on the front surface of the substrate (1000) excluding the region occupied by the TFT layer. Here, the TFT provided to the display module (100) may be an LTPS (low temperature polycrystalline silicon) TFT, a polycrystalline oxide) TFT, or an oxide TFT.

[0052] The TFT layer can be formed integrally on the substrate (1000) or manufactured in the form of a separate film and attached to one side of the substrate (1000).

[0053] The substrate (1000) may be formed in a quadrangle type. Specifically, the substrate (1000) may be formed in a rectangle or a square, etc. The edge region of the substrate (1000) may include at least one of the four sides of the substrate (1000).

[0054] The display module (100) has externally exposed electrodes and externally hidden electrodes formed on a TFT substrate, thereby minimizing the inactive area and maximizing the active area on the front surface of the TFT substrate, so that it can be bezel-less and increase the mounting density of multiple pixels for the display module (100).

[0055] FIG. 2 is a drawing showing a substrate (1000) according to at least one embodiment of the present disclosure.

[0056] The display device (1) may include a substrate (1000), a plurality of pixels (1100) and thin-film transistors (1200).

[0057] The substrate (1000) can be formed from polyimide (PI), polyethylene terephthalate (PET), metal foil, polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), glass, etc.

[0058] Multiple pixels (1100) can be placed on the upper side of the substrate (1000).

[0059] A plurality of pixels (1100) is a configuration that constitutes the screen of a display device (1). A plurality of pixels (1100) may be composed of a set of a plurality of subpixels (1110, 1120, 1130, 1140). A plurality of pixels (1100) may include a red pixel (1110), a green pixel (1120), a first blue pixel (1130), and a second blue pixel (1140), which are a plurality of subpixels (1110, 1120, 1130, 1140).

[0060] One red pixel (1110) is a pixel that includes a wavelength range between 635 nm and 700 nm within the visible light wavelength range. One green pixel (1120) is a pixel that includes a wavelength range between 520 nm and 560 nm within the visible light wavelength range. The first blue pixel (1130) and the second blue pixel are pixels that include a wavelength range between 450 nm and 490 nm within the visible light wavelength range.

[0061] One red pixel (1110) can emit red light. One green pixel (1120) can emit green light. The first blue pixel (1130) and the second blue pixel (1140) can emit blue light.

[0062] Here, the first blue pixel (1130) can emit light at a preset gradation (nit) or higher. The second blue pixel (1140) can emit light at a preset gradation (nit) or lower. For example, when the target brightness of the blue pixel is 250 gradations (nit), the first blue pixel (1130) can emit light at 120 gradations or higher, and the second blue pixel (1140) can emit light at less than 120 gradations.

[0063] However, the pre-set gradation (nit) value is not necessarily limited to this and may vary depending on the size, shape, performance, etc. of the display device (1).

[0064] The pre-set gradation (nit) value can be set to a gradation value (nit) optimized for the maximum gradation that can maximize the lifespan of the display device (1) after selecting the maximum gradation.

[0065] In FIG. 2, when the gradation (nit) value of the blue pixel of the display device (1) changes rapidly, the first blue pixel (1130) and the second blue pixel (1140) can emit light simultaneously. For example, when the gradation (nit) value of the blue pixel of the display device (1) changes rapidly from 0 to 250 gradations (nit), the first blue pixel (1130) and the second blue pixel (1140) can emit light simultaneously. The rate of change per hour of the gradation (nit) value at which the first blue pixel (1130) and the second blue pixel (1140) emit light simultaneously can vary according to the user's settings.

[0066] In FIG. 2, the display device (1) may have a plurality of pixels (1100) arranged in a plurality of layers in the horizontal and vertical directions on a substrate (1000).

[0067] In FIG. 2, each of the plurality of pixels (1100) may include a stripe structure in which a plurality of subpixels (1110, 1120, 1130, 1140) are arranged in a row. The first blue pixel (1130) and the second blue pixel (1140) may be arranged at adjacent positions within the stripe structure. For example, the arrangement of the plurality of pixels (1100) may be arranged from left to right in the order of one red pixel (1110), one green pixel (1120), the first blue pixel (1130), and the second blue pixel (1140).

[0068] However, it is not necessarily limited to this, and multiple pixels (1100) can be formed in various structures such as square tile structures, pentile structures, diamond structures, and square structures. Since a detailed explanation of this is to be covered in detail in FIGS. 5 to 8, a detailed explanation thereof is omitted.

[0069] In FIG. 2, the display device (1) can arrange a plurality of pixels (1100) on a substrate (1000) in a mixed configuration of various structures rather than a single structure. For example, the display device (1) can arrange a plurality of pixels (1100) on a substrate (1000) in a mixed configuration of a stripe structure, a square tile structure, etc.

[0070] In FIG. 2, the arrangement of multiple pixels (1100) can be arranged in various ways within the stripe structure. For example, the first blue pixel (1130) and the second blue pixel (1140) can be arranged in adjacent positions. Conversely, the first blue pixel (1130) and the second blue pixel (1140) can be arranged in opposite positions.

[0071] Additionally, at least one of the first blue pixel (1130) and the second blue pixel (1140) may be placed between one red pixel (1110) and one green pixel (1120).

[0072] In FIG. 2, the first blue pixel (1130) may include a Cd-based QD (Quantum Dot). The second blue pixel (1140) may include a non-Cd-based QD (Quantum Dot).

[0073] The first blue pixel (1130), which includes a Cd-based QD (Quantum Dot), is a pixel containing cadmium (Cd). By including cadmium (Cd), the first blue pixel (1130) has a high quantum efficiency, allowing it to emit light more brightly with the same power. Additionally, by including cadmium (Cd), the first blue pixel (1130) has a narrow emission spectrum, resulting in excellent color purity and durability.

[0074] The second blue pixel (1140) containing non-Cd-based quantum dots (QDs) is a pixel using a material other than cadmium (Cd). The second blue pixel (1140) may include various alternative materials such as indium phosphide (InP), zinc selenide (ZnSe), perovskite, and zinc telluride selenide (ZnTeSe), which are non-Cd-based quantum dots. Since the second blue pixel (1140) containing non-Cd-based quantum dots does not contain cadmium (Cd), which is a harmful substance, it may be environmentally friendly. However, the second blue pixel (1140) may have lower quantum efficiency and lower durability compared to the first blue pixel (1130).

[0075] Accordingly, the display device (1) includes both a first blue pixel (1130) containing a Cd-based QD (Quantum Dot) and a second blue pixel (1140) containing a non-Cd-based QD (Quantum Dot), thereby increasing durability compared to using a blue pixel containing only a non-Cd-based QD (Quantum Dot).

[0076] In addition, the display device (1) includes both a first blue pixel (1130) containing a Cd-based QD (Quantum Dot) and a second blue pixel (1140) containing a non-Cd-based QD (Quantum Dot), thereby reducing the proportion of cadmium (Cd) contained in the display device (1), which can reduce environmental pollution.

[0077] A thin-film transistor (1200) can be formed to enable control of a plurality of pixels (1100). The thin-film transistor (1200) can be placed between a substrate (1000) and a plurality of pixels (1100). The thin-film transistor (1200) may be formed entirely on the upper side of the substrate (1000), or may be formed only on the lower side of the plurality of pixels (1100). A detailed description of the thin-film transistor (1200) will be covered in detail in FIG. 4, so a description thereof is omitted.

[0078] FIG. 3 is a drawing for explaining the operation of a display device (1) according to at least one embodiment of the present disclosure.

[0079] In FIG. 3, the display device (1) may include a processor (40), a substrate (1000), a plurality of pixels (1100) and a driver IC (70).

[0080] The driver IC (70) includes a gate driver IC (70-1) and a source driver IC (70-2). The gate driver IC (70-1) can turn on or turn off each of the red pixel (1110), the green pixel (1120), the first blue pixel (1130), and the second blue pixel (1140) mounted on the substrate (1000).

[0081] The source driver IC (70-2) can perform the role of determining the color gradation to be expressed by one red pixel (1110), one green pixel (1120), the first blue pixel (1130), and the second blue pixel (1140).

[0082] The gate driver IC (70-1) may include a switching circuit (72). The switching circuit (72) may turn on or turn off at least one of the first blue pixel (1130) and the second blue pixel (1140) according to a preset grayscale value stored in the memory (71).

[0083] The processor (40) can emit light from at least one pixel among a plurality of pixels (1100) arranged on the substrate (1000).

[0084] The processor (40) can emit at least one of the first blue pixel (1130) and the second blue pixel (1140) using a switching circuit (2000). The processor (40) can emit the first blue pixel (1130) at a preset grayscale level or higher. The processor (40) can emit the second blue pixel (1140) at a grayscale level or lower.

[0085] When multiple pixels (1100) change from a preset grayscale level below a preset grayscale level above a preset grayscale level, the processor (40) can use a switching circuit (2000) to turn off the first blue pixel (1130) and emit light from the second blue pixel (1140).

[0086] When the grayscale values ​​of multiple pixels (1100) change rapidly, the processor (40) can cause both the first blue pixel (1130) and the second blue pixel (1140) to emit light. In this case, the second blue pixel (1140) can emit light only up to a preset grayscale value. That is, the processor (40) can cause the second blue pixel (1140) to emit light only up to a preset grayscale value.

[0087] Accordingly, the display device (1) can improve the durability of multiple pixels (1100).

[0088] FIG. 4 is a schematic cross-sectional view of a plurality of pixels (1100) of a display device (1) according to at least one embodiment of the present disclosure.

[0089] The display device (1) may include a substrate (1000), a plurality of pixels (1100), and a thin-film transistor (1200).

[0090] A thin-film transistor (1200) may be placed on the upper side of a substrate (1000). The thin-film transistor (1200) may be formed to control a plurality of pixels (1100). For example, the thin-film transistor (1200) may be formed to control one red pixel (1110), one green pixel (1120), a first blue pixel (1130), and a second blue pixel (1140) of the plurality of pixels (1100), respectively. When power is applied by the thin-film transistor (1200), the one red pixel (1110), one green pixel (1120), the first blue pixel (1130), and the second blue pixel (1140) may emit light.

[0091] For example, when power is supplied to a red pixel (1110) by a thin-film transistor (1200), the red pixel (1110) can emit red light. When power is supplied to a green pixel (1120) by a thin-film transistor (1200), the green pixel (1120) can emit green light. When power is supplied to a first blue pixel (1130) or a second blue pixel (1140) by a thin-film transistor (1200), the first blue pixel (1130) or the second blue pixel (1140) can emit blue light.

[0092] A substrate (1000) may be installed on the lower side of the thin-film transistor (1200). The thin-film transistor (1200) may be positioned between the substrate (1000) and a plurality of pixels (1100). The thin-film transistor (1200) may be formed entirely on the upper side of the substrate (1000), or it may be formed only on the lower side of the plurality of pixels (1100).

[0093] Due to differences in visual sensitivity among one red pixel (1110), one green pixel (1120), one first blue pixel (1130), and two second blue pixels (1140), the visibility of one green pixel (1120) is the best, and the visibility of the first blue pixel (1130) and two second blue pixels (1140) is the worst. The visibility of one red pixel (1110) is better than that of one green pixel (1120), and better than that of the first blue pixel (1130) and two blue pixels (1140).

[0094] FIG. 5 is a drawing showing a plurality of pixels (1100) according to at least one embodiment of the present disclosure.

[0095] In FIG. 5, a plurality of pixels (1100) may include a plurality of subpixels.

[0096] A plurality of subpixels may include one red pixel (1110a), one green pixel (1120a), a first blue pixel (1130a), and a second blue pixel (1140a).

[0097] In FIG. 5, each of the plurality of pixels (1100) may be formed into a stripe structure in which a plurality of subpixels (1110, 1120, 1130, 1140) are arranged in a row. For example, the plurality of subpixels (1110a, 1120a, 1130a, 1140a) of the plurality of pixels (1100) may be arranged in the order of one red pixel (1110a), one green pixel (1120a), a first blue pixel (1130a), and a second blue pixel (1140a) from the leftmost side. Here, the first blue pixel (1130a) and the second blue pixel (1140a) may be arranged adjacent to each other.

[0098] FIG. 6 is a drawing showing a plurality of pixels (1100) according to at least one embodiment of the present disclosure.

[0099] In FIG. 6, a plurality of pixels (1100) may include a plurality of subpixels.

[0100] A plurality of subpixels may include one red pixel (1110b), one green pixel (1120b), a first blue pixel (1130b), and a second blue pixel (1140b).

[0101] In FIG. 6, each of the plurality of pixels (1100) may be formed into a stripe structure in which a plurality of subpixels (1110b, 1120b, 1130b, 1140b) are arranged in a row. The plurality of pixels (1100) may be arranged in the order of a first blue pixel (1130b), one red pixel (1110b), one green pixel (1120b), and a second blue pixel (1140b) from the far left. That is, the first blue pixel (1130b) and the second blue pixel (1140b) may be placed at the furthest positions within the plurality of pixels (1100).

[0102] However, the arrangement of the first blue pixel (1130) and the second blue pixel (1140) is not limited to FIGS. 5 and 6 and can be arranged in various ways within the stripe structure. For example, at least one of the first blue pixel (1130) and the second blue pixel (1140) may be placed between one red pixel (1110) and one green pixel (1120).

[0103] FIG. 7 is a drawing showing a plurality of pixels (1100) according to at least one embodiment of the present disclosure.

[0104] In FIG. 7, a plurality of pixels (1100) may include a plurality of subpixels (1110c, 1120c, 1130c, 1140c).

[0105] A plurality of subpixels may include one red pixel (1110c), one green pixel (1120c), a first blue pixel (1130c), and a second blue pixel (1140c).

[0106] In FIG. 7, each of the plurality of pixels (1100) may include a square tile structure in which a plurality of subpixels (1110c, 1120c, 1130c, 1140c) are arranged in a square shape. For example, one red pixel (1100c) may be placed on top of the plurality of pixels (1100). A first blue pixel (1130c) and a second blue pixel (1140c) may be placed in the center of the plurality of pixels (1100). The first blue pixel (1130c) may be placed on the left side of the center of the plurality of pixels (1100). The second blue pixel (1140c) may be placed on the right side of the center of the plurality of pixels (1100). One green pixel (1120c) may be placed on the bottom of the plurality of pixels (1100).

[0107] That is, the first blue pixel (1130c) and the second blue pixel (1140c) can each be placed in opposite corner portions within the square tile structure.

[0108] However, it is not necessarily limited to this, and the arrangement of one red pixel (1110c), one green pixel (1120c), the first blue pixel (1130c), and the second blue pixel (1140c) can be arranged in various ways within the pentile shape.

[0109] FIG. 8 is a drawing showing a plurality of pixels (1100) according to at least one embodiment of the present disclosure.

[0110] In FIG. 8, a plurality of pixels (1100) may include a plurality of subpixels.

[0111] A plurality of subpixels may include one red pixel (1110d), one green pixel (1120d), a first blue pixel (1130d), and a second blue pixel (1140d).

[0112] In FIG. 8, each of the plurality of pixels (1100) may include a square tile structure in which a plurality of subpixels (1110d, 1120d, 1130d, 1140d) are arranged in a square shape. For example, one red pixel (1100d) may be placed on top of the plurality of pixels (1100). One green pixel (1120d) and a second blue pixel (1130d) may be placed in the center of the plurality of pixels (1100). One green pixel (1120d) may be placed on the left side of the center of the plurality of pixels (1100). A second blue pixel (1140d) may be placed on the right side of the center of the plurality of pixels (1100). A first blue pixel (1130d) may be placed on the bottom of the plurality of pixels (1100).

[0113] In FIG. 8, the first blue pixel (1130d) and the second blue pixel (1140d) may be arranged in adjacent positions within a square tile structure. However, this is not necessarily limited thereto, and the arrangement of one red pixel (1110d), one green pixel (1120d), the first blue pixel (1130d), and the second blue pixel (1140d) may be arranged in various ways within the square tile structure.

[0114] Each of the components described in this document may consist of one or more components, and the names of such components may vary depending on the type of display device.

[0115] Although various embodiments of the present disclosure have been described individually above, each embodiment is not required to be implemented alone, and the configuration and operation of each embodiment may be implemented in combination with at least one other embodiment.

[0116] Although preferred embodiments have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above. It is understood that various modifications can be made by those skilled in the art without departing from the essence of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present disclosure.

Claims

1. In a display device, Substrate; and A plurality of pixels disposed on the above substrate, each including a plurality of subpixels, and The above plurality of subpixels are, One red pixel; A single green pixel; A first blue pixel that emits light at a preset gradation or higher; and A display device comprising: a second blue pixel that emits light at a grayscale level lower than a preset grayscale.

2. In Paragraph 1, The first blue pixel above includes a Cd-based QD, and A display device in which the second blue pixel comprises a non-Cd-based QD.

3. In Paragraph 1, A display device further comprising a switching circuit for emitting at least one of the first blue pixel and the second blue pixel according to an input grayscale value.

4. In Paragraph 1, Each of the above plurality of pixels is, The above-mentioned plurality of subpixels are arranged in a row in a stripe structure, and A display device in which the first blue pixel and the second blue pixel are arranged at adjacent positions within the stripe structure.

5. In Paragraph 1, Each of the above plurality of pixels is, The above-mentioned plurality of subpixels are arranged in a row in a stripe structure, and A display device in which the first blue pixel and the second blue pixel are arranged at positions facing each other within the stripe structure.

6. In Paragraph 1, Each of the above plurality of pixels is, The above-mentioned plurality of subpixels are arranged in a row in a stripe structure, and A display device in which at least one of the first blue pixel and the second blue pixel is positioned between the one red pixel and the one green pixel within the stripe structure.

7. In Paragraph 1, Each of the above plurality of pixels is, The above-mentioned plurality of subpixels are arranged in a square tile structure, and A display device in which the first blue pixel and the second blue pixel are arranged at adjacent positions within the square tile structure.

8. In Paragraph 1, Each of the above plurality of pixels is, The above-mentioned plurality of subpixels are arranged in a square tile structure, and A display device in which the first blue pixel and the second blue pixel are each positioned in opposite corner portions within the square tile structure.

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