Display device

Abstract

A display device includes pixel units arranged in an array. Each pixel unit includes sub-pixel units, wherein a first sub-pixel unit of the sub-pixel units have two main regions and two auxiliary regions, and a first virtual line between the two main regions intersects a second virtual line between the two auxiliary regions.

Description

[Technical Field]

[0001] The present invention relates to an optoelectronic device, and more particularly to a display device. [Previous Technology]

[0002] Micro-LED display devices have advantages such as power saving, high efficiency, high brightness, and fast response time. Due to the extremely small size of micro-LEDs, the current method for manufacturing micro-LED display devices is to use mass transfer technology, that is, to use microelectromechanical array (MEMS) technology to pick up and place micro-LED chips, so as to transport a large number of micro-LED chips onto the circuit board at once. However, mass transfer technology often results in chip misalignment. In addition, even if the chip transfer position is correct, there may still be poor contact between the chip and the circuit board, or the chip itself may be faulty or defective.

[0003] To improve the maintainability of display devices, one current approach is to design a main area for mass transfer and a sub-area for repair on the circuit board. When a chip mass-transferred to the main area fails, it can be implanted into the sub-area for repair. Generally, the spacing between the main areas of chips that set the same light color is designed to be substantially the same. However, since the position of the sub-area is inevitably offset relative to the main area, the spacing between the chip repaired in the sub-area and the chips on both sides of it located in the main area is different. For example, the side with reduced spacing will produce bright spots, while the side with increased spacing will produce dark spots. Although bright spots can be eliminated by reducing the brightness through digital compensation by lowering the compensation coefficient, dark spots cannot be eliminated because there are no LED chips available for brightness adjustment at the location of the dark spots, resulting in reduced brightness uniformity of the display device. [Summary of the Invention]

[0004] An embodiment of the present invention provides a display device including a plurality of pixel units arranged in an array, each pixel unit including a plurality of sub-pixel units, wherein a first sub-pixel unit among the plurality of sub-pixel units has two first main areas and two first sub-areas, and a first virtual connection between the two first main areas intersects with a second virtual connection between the two first sub-areas.

[0005] In one embodiment of the present invention, the two first main regions and the two first sub-regions are arranged in a 2x2 array.

[0006] In one embodiment of the present invention, the first virtual connection line and the second virtual connection line intersect at an intersection point, and the intersection points of the plurality of first sub-pixel units of the plurality of pixel units are arranged in a straight line.

[0007] In one embodiment of the present invention, the first sub-pixel unit includes two first light-emitting elements, which are respectively disposed in two first main areas.

[0008] In one embodiment of the present invention, two first light-emitting elements respectively disposed in two first main regions are connected in series or in parallel between a high potential and a low potential.

[0009] In one embodiment of the present invention, the first sub-pixel unit includes at least three first light-emitting elements, and two of the at least three first light-emitting elements are respectively disposed in two first sub-regions.

[0010] In one embodiment of the present invention, two first light-emitting elements respectively disposed in two first sub-regions are connected in series or in parallel between a high potential and a low potential.

[0011] In one embodiment of the present invention, the first light-emitting element disposed in the first main area among the above-mentioned at least three first light-emitting elements fails.

[0012] In one embodiment of the present invention, the second sub-pixel unit among the plurality of sub-pixel units has two second main regions and two second sub-regions, and the third virtual connection between the two second main regions intersects with the fourth virtual connection between the two second sub-regions.

[0013] In one embodiment of the present invention, the second sub-pixel unit includes two second light-emitting elements, and the two second light-emitting elements are respectively disposed in two second main areas or two second sub-areas.

[0014] In one embodiment of the present invention, the third sub-pixel unit among the plurality of sub-pixel units described above has a third main region and a third sub-region, and the third light-emitting element of the third sub-pixel unit is disposed in the third main region or the third sub-region.

[0015] In one embodiment of the present invention, the third sub-pixel unit among the plurality of sub-pixel units described above has two third main regions and two third sub-regions, and the fifth virtual connection between the two third main regions intersects with the sixth virtual connection between the two third sub-regions.

[0016] In one embodiment of the present invention, the second sub-pixel unit among the plurality of sub-pixel units has a second main region and a second sub-region, the third sub-pixel unit among the plurality of sub-pixel units has a third main region and a third sub-region, and each pixel unit includes a first sub-pixel unit, two second sub-pixel units and two third sub-pixel units.

[0017] In one embodiment of the present invention, the second sub-pixel unit and the third sub-pixel unit are alternately disposed on one side of the first sub-pixel unit along a direction.

[0018] In order to make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below, and detailed descriptions are given in conjunction with the accompanying drawings.

Implementation Method

[0019] In the accompanying drawings, the thicknesses of layers, films, panels, regions, etc., are enlarged for clarity. Throughout the specification, the same reference numerals denote the same elements. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another element, it may be directly on or connected to the other element, or intermediate elements may also be present. Conversely, when an element is referred to as being "directly on" or "directly connected" to another element, no intermediate elements are present. As used herein, "connection" may refer to a physical and / or electrical connection. Furthermore, "electrical connection" or "coupling" may mean that other elements exist between the two elements.

[0020] It should be understood that although the terms "first," "second," "third," etc., may be used herein to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, the first "element," "component," "region," "layer," or "part" discussed below may be referred to as a second element, component, region, layer, or part without departing from the teachings of this document.

[0021] The terminology used herein is for the purpose of describing particular embodiments only and is not restrictive. As used herein, unless the content clearly indicates otherwise, the singular forms "a," "an," and "the" are intended to include the plural forms, including "at least one" or indicating "and / or." As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It should also be understood that, when used in this specification, the terms "comprising" and / or "including" specify the presence of the stated features, areas, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, areas, integrals, steps, operations, elements, components, and / or combinations thereof.

[0022] Furthermore, relative terms such as "below" or "bottom" and "above" or "top" may be used herein to describe the relationship between one element and another element, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device other than those shown in the figures. For example, if a device in one figure is flipped, an element described as being "below" the other element will be oriented "above" the other element. Thus, the exemplary term "below" can include both "below" and "above" orientations, depending on the specific orientation of the figure. Similarly, if a device in one figure is flipped, an element described as being "below" or "below" the other element will be oriented "above" the other element. Thus, the exemplary term "below" or "below" can include both "above" and "below" orientations.

[0023] Considering the specific number of measurements discussed and the errors associated with those measurements (i.e., limitations of the measurement system), the terms "about," "approximately," "generally," or "substantially" as used herein include the value and the average value within an acceptable range of deviations from the specific value as determined by one of ordinary skill in the art. For example, "about" may mean within one or more standard deviations of the value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, the terms "about," "approximately," "generally," or "substantially" as used herein may be chosen based on the optical, etched, or other properties to select a more acceptable range of deviations or standard deviations, rather than applying a single standard deviation to all properties.

[0024] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as they have in the context of the relevant technology and the present invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined herein.

[0025] Exemplary embodiments are described herein with reference to cross-sectional views as schematic representations of idealized embodiments. Therefore, shape variations in the illustrations are contemplated as a result of, for example, manufacturing techniques and / or tolerances. Consequently, the embodiments described herein should not be construed as limited to specific shapes of the regions shown herein, but rather include, for example, shape deviations resulting from manufacturing processes. For example, regions shown or described as flat may generally have rough and / or non-linear characteristics. Furthermore, acute angles shown may be rounded. Therefore, the regions shown in the figures are schematic in nature, and their shapes are not intended to show precise shapes of the regions, nor are they intended to limit the scope of the claims.

[0026] FIG1A is a top view schematic diagram of a display device 10 according to an embodiment of the present invention. FIG1B is an enlarged schematic diagram of the pixel unit PX of the display device 10 of FIG1A. FIG1C is a cross-sectional schematic diagram taken along section line A-A' of FIG1B. FIG1D is a cross-sectional schematic diagram taken along section line B-B' of FIG1B. Hereinafter, embodiments of the various elements of the display device 10 will be described in conjunction with FIG1A to FIG1D, but the present invention is not limited thereto.

[0027] First, please refer to FIG1A. The display device 10 includes a plurality of pixel units PX disposed on the circuit board 110. The plurality of pixel units PX can be arranged in an array. The spacing between adjacent pixel units PX is not particularly limited and can be determined according to actual usage requirements. In some embodiments, the spacing between adjacent pixel units PX is substantially the same.

[0028] In some embodiments, the display device 10 further includes a driving element DC, which can be electrically connected to each pixel unit PX to transmit driving or control signals to corresponding components within each pixel unit PX. In some embodiments, the driving element DC may be a chip bonded to the circuit board 110 or a circuit element (including active elements, passive elements, or combinations thereof) directly formed in the circuit board 110.

[0029] Referring to Figure 1B, each pixel unit PX may include multiple sub-pixel units SP. In some embodiments, the multiple sub-pixel units SP include three types of sub-pixel units SP1, SP2, and SP3, wherein the three types of sub-pixel units SP1, SP2, and SP3 can respectively provide the three primary colors of light, such as red light, blue light, and green light, so that the pixel unit PX can provide the desired color of light. There is no particular limitation on the number of sub-pixel units SP1, SP2, and SP3 within the pixel unit PX; at least one sub-pixel unit SP1, at least one sub-pixel unit SP2, and at least one sub-pixel unit SP3 can be used as needed. For example, the pixel unit PX includes one sub-pixel unit SP1, one sub-pixel unit SP2, and one sub-pixel unit SP3.

[0030] The sub-pixel unit SP1 may have two main regions M1 and M2 and two sub-regions A1 and A2, wherein the main regions M1 and M2 are configured to receive light-emitting elements disposed by mass transfer, and the sub-regions A1 and A2 are configured to receive light-emitting elements disposed by a repair process. A virtual connection VL1 may be drawn between the main regions M1 and M2, and a virtual connection VL2 may be drawn between the sub-regions A1 and A2, and the virtual connection VL1 and VL2 may intersect at the intersection point CP. In some embodiments, the main regions M1 and M2 and the sub-regions A1 and A2 are arranged in a 2x2 array or a square array, wherein the main regions M1 and M2 may be located at the two ends of one diagonal of the array, and the sub-regions A1 and A2 may be located at the two ends of the other diagonal of the array.

[0031] Please refer to Figures 1B and 1C. The sub-pixel unit SP1 includes, for example, a circuit board 110, pads 130 and 140, two light-emitting elements 151, a connector 160, and a connector 170. Pads 130 and 140 are disposed on the surface of the circuit board 110, and the electrode E1 of the light-emitting element 151 is electrically connected to the pad 130 through the connector 160, and the electrode E2 of the light-emitting element 151 is electrically connected to the pad 140 through the connector 170.

[0032] In some embodiments, the circuit board 110 may include a base plate 112 and a driving circuit layer 114. The base plate 112 of the circuit board 110 may be a transparent substrate or a non-transparent substrate, and its material may be a quartz substrate, a glass substrate, a polymer substrate or other suitable material, but the present invention is not limited thereto. The driving circuit layer 114 may include components or lines required by the display device 10, such as driving elements, switching elements, storage capacitors, power lines, driving signal lines, timing signal lines, current compensation lines, detection signal lines, etc.

[0033] In some embodiments, a driving circuit layer 114 can be formed on the substrate 112 using a thin film deposition process, a photomask process, and an etching process, and the driving circuit layer 114 may include an active element array, wherein the active element array includes a plurality of active elements T arranged in an array.

[0034] In some embodiments, the driving circuit layer 114 includes a buffer layer I1, an active element T, a gate insulating layer I2, an interlayer insulating layer I3, and a planarization layer I4. In other embodiments, the driving circuit layer 114 may include more insulating layers and conductive layers as needed. The active element T is composed of a semiconductor layer CH, a gate GE, a source SE, and a drain DE. The region where the semiconductor layer CH overlaps with the gate GE can be considered as the channel region of the active element T. The gate insulating layer I2 is located between the gate GE and the semiconductor layer CH, and the interlayer insulating layer I3 is disposed between the source SE and the gate GE, and between the drain DE and the gate GE. The gate GE and the source SE can respectively receive signals from the driving element DC. The material of the semiconductor layer CH may include silicon semiconductor materials (e.g., polycrystalline silicon, amorphous silicon, etc.), oxide semiconductor materials, and organic semiconductor materials. The materials of the gate GE, the source SE, and the drain DE may include metals with good conductivity, such as aluminum, molybdenum, titanium, copper, etc., but the present invention is not limited thereto.

[0035] The materials of the buffer layer I1, the gate insulating layer I2, and the interlayer insulating layer I3 may include transparent insulating materials, such as silicon oxide, silicon nitride, silicon oxynitride, or a stack of the above materials, but the present invention is not limited thereto. The material of the planarization layer I4 may include transparent insulating materials, such as organic materials, acrylic materials, siloxane materials, polyimide materials, epoxy resin materials, etc., but the present invention is not limited thereto. The buffer layer I1, the gate insulating layer I2, the interlayer insulating layer I3, and the planarization layer I4 may also have single-layer or multi-layer structures, such as a stack of any two or more layers of the above insulating materials, which can be combined and varied as needed.

[0036] After the driving circuit layer 114 is formed, a plurality of pads 130 and a plurality of pads 140 can be formed on the planarization layer 14 using thin film deposition, photomask, and etching processes. In some embodiments, the pads 140 are electrically connected to the drain DE of the active element T through vias in the planarization layer 14, but the invention is not limited thereto. In other embodiments, the active element T may also be electrically connected to the pads 130. In some embodiments, a plurality of pads 130 are arranged in an array on the surface of the circuit board 110. In some embodiments, a plurality of pads 140 are arranged in an array on the surface of the circuit board 110.

[0037] The drive element DC can be electrically connected to pads 130 and 140 respectively. In some embodiments, the pads 130 in the plurality of sub-pixels SP are separated from each other and independently receive signals provided by the drive element DC. In some embodiments, the pads 140 in the plurality of sub-pixels SP can be electrically connected to each other and / or the pads 140 are subjected to the same common voltage during operation.

[0038] Pads 130 and 140 may have a single-layer structure or a structure with multiple or more conductive layers stacked together. For example, pads 130 and 140 may have a structure in which metals such as aluminum, molybdenum, titanium, and copper are stacked with indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), or other suitable conductive oxides, but the present invention is not limited thereto.

[0039] The light-emitting element 151 may include electrodes E1 and E2 and a light-emitting stack LS, wherein electrodes E1 and E2 are electrically connected to different layers in the light-emitting stack LS. For example, the light-emitting stack LS may include two semiconductor layers and a light-emitting layer sandwiched between the two semiconductor layers, and electrode E1 may be electrically connected to one of the two semiconductor layers, while electrode E2 may be electrically connected to the other of the two semiconductor layers. The materials of electrodes E1 and E2 may include metals, alloys, nitrides of metal materials, oxides of metal materials, oxynitrides of metal materials, or other suitable materials, or a stack of metal materials and other conductive materials, or other low-resistance materials.

[0040] The light-emitting element 151 can be fabricated on a growth substrate and then transferred to the main regions M1 and M2 of the sub-pixel unit SP1 through a mass transfer process. Electrodes E1 and E2 can be electrically connected to pads 130 and 140 respectively via connectors 160 and 170. The connectors 160 and 170 are made of materials such as metal, conductive adhesive, or other materials. Furthermore, other conductive materials or conductive adhesives may be included between connectors 160 and pads 130, and between connectors 170 and pads 140.

[0041] In some embodiments, the display device 10 further includes a color conversion layer CT disposed on the light-emitting element 151. The color conversion layer CT may include phosphor or a wavelength conversion material with similar properties to convert the colored light emitted by the light-emitting element 151 into light of different colors, thereby achieving a full-color display effect.

[0042] When the light-emitting elements 151 transferred to the main areas M1 and M2 of the sub-pixel unit SP1 are tested and confirmed to be functioning normally, no repair is required for the sub-pixel unit SP1. Therefore, there are no light-emitting elements in the sub-areas A1 and A2 of the sub-pixel unit SP1, as shown in Figures 1B and 1D. In this case, the sub-pixel unit SP1 uses the two light-emitting elements 151 located in the main areas M1 and M2 to emit light.

[0043] Referring to FIG1B, in some embodiments, the sub-pixel unit SP2 has a main region M1 and a sub-region A1. Similar to the sub-pixel unit SP1, pads 130 and 140 can be disposed in the main region M1 and sub-region A1 of the sub-pixel unit SP2, and the sub-pixel unit SP2 can include a light-emitting element 152 disposed in the main region M1. The two electrodes of the light-emitting element 152 can also be electrically connected to the pads 130 and 140 respectively through connectors. In some embodiments, when the light-emitting element 152 transferred to the main region M1 fails, another light-emitting element can be disposed in the sub-region A1 of the sub-pixel unit SP2 through a repair process.

[0044] In some embodiments, the sub-pixel unit SP3 has a main region M1 and a sub-region A1. Similar to the sub-pixel unit SP1, pads 130 and 140 can be disposed in the main region M1 and sub-region A1 of the sub-pixel unit SP3, and the sub-pixel unit SP3 can include a light-emitting element 153 disposed in the main region M1. The two electrodes of the light-emitting element 153 can also be electrically connected to the pads 130 and 140 respectively through connectors. In some embodiments, when the light-emitting element 153 transferred to the main region M1 fails, another light-emitting element can be disposed in the sub-region A1 of the sub-pixel unit SP3 through a repair process.

[0045] When the light-emitting elements 151, 152, and 153 emit different colors, the color conversion layer CT in Figure 1C can be selectively omitted or retained on the light-emitting elements 151, 152, and 153. In some embodiments, the light-emitting elements 151, 152, and 153 can be red light-emitting diodes, green light-emitting diodes, and blue light-emitting diodes, respectively, to achieve a full-color display effect. In some embodiments, since the human eye is more sensitive to green light than to red or blue light, the light-emitting element 151 disposed in the sub-pixel unit SP1 can be a green light-emitting diode, while the light-emitting element 152 disposed in the sub-pixel unit SP2 and the light-emitting element 153 disposed in the sub-pixel unit SP3 can be red light-emitting diodes and blue light-emitting diodes, respectively. In other embodiments, the light-emitting elements 151, 152, and 153 can all be white light-emitting diodes, and corresponding color filter layers can be provided on the light-emitting elements 151, 152, and 153 as color conversion layers (CT) to provide the required light color.

[0046] FIG2 is a circuit diagram of a sub-pixel unit SP1 of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Referring to FIG2, the pads 130 in the main region M1 and the sub-region A1 of the sub-pixel unit SP1 are electrically connected to a high potential VH, and the pads 140 in the main region M2 and the sub-region A2 are electrically connected to a low potential VL. After the light-emitting elements 151 are massively transferred to the main regions M1 and M2, the light-emitting elements 151 in the main region M1 and the light-emitting elements 151 in the main region M2 can be connected in series between the high potential VH and the low potential VL.

[0047] In some embodiments, as shown in FIG1C, the active element T can be disposed between the high potential VH and the light-emitting element 151 in the main region M1. Thus, when the active element T is turned on, the current C from the high potential VH can first flow through the pad 130, the light-emitting element 151, and the pad 140 in the main region M1, and then flow through the pad 130, the light-emitting element 151, and the pad 140 in the main region M2, so that the light-emitting elements 151 in the main regions M1 and M2 constitute a so-called tandem LED architecture. Compared to an architecture where only a single light-emitting element is disposed between the high potential VH and the low potential VL (Single LED architecture), the tandem LED architecture can reduce the proportion of energy consumption caused by the voltage difference of the active element T. For example, using the same 1 watt of power, the brightness of the Single LED architecture can only reach a maximum of 62.5% of that of the tandem LED architecture; in other words, the tandem LED architecture has reduced power consumption.

[0048] Hereinafter, other embodiments of the present invention will continue to be described using Figures 3 to 13, and the element references and related content of the embodiments of Figures 1A to 2 will be used, wherein the same reference numerals are used to represent the same or similar elements, and the description of the same technical content is omitted. Regarding the description of the omitted parts, please refer to the embodiments of Figures 1A to 2, and will not be repeated in the following description.

[0049] FIG3 is another circuit diagram of a sub-pixel unit SP1 of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Compared with the circuit of the sub-pixel unit SP1 shown in FIG2, the main difference of the circuit of the sub-pixel unit SP1 shown in FIG3 is that the pads 130 in the main regions M1 and M2 and the pads 130 in the sub-regions A1 and A2 can be electrically connected to a high potential VH, and the pads 140 in the main regions M1 and M2 and the pads 140 in the sub-regions A1 and A2 can be electrically connected to a low potential VL. In some embodiments, two light-emitting elements 151 disposed in the main regions M1 and M2 and capable of normal operation are connected in parallel between the high potential VH and the low potential VL. Therefore, the current C from the high potential VH can flow through the light-emitting elements 151 in the main regions M1 and M2, thereby illuminating the light-emitting elements 151 in the main regions M1 and M2.

[0050] FIG4A is a top view schematic diagram of a sub-pixel unit SP1a of a pixel unit PX of a display device 10 according to an embodiment of the present invention. FIG4B is a cross-sectional schematic diagram taken along section line C-C' of FIG4A. FIG4C is a circuit schematic diagram of a sub-pixel unit SP1a of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Referring to FIGS. 1A to 1B and FIGS. 4A to 4C, the display device 10 includes a plurality of pixel units PX arranged in an array on a circuit board 110. In some embodiments, the pixel unit PX may include sub-pixel units SP1a, SP2, and SP3. In other words, the pixel unit PX can use the sub-pixel unit SP1a shown in FIG4A to replace the sub-pixel unit SP1 shown in FIG1B. The sub-pixel unit SP1a has two main regions M1 and M2 and two sub-regions A1 and A2, and includes a circuit board 110, a pad 130, a pad 140, and two light-emitting elements 151 respectively disposed in the two main regions M1 and M2.

[0051] Compared with the sub-pixel unit SP1 shown in Figures 1B, 1C and 2, the main difference of the sub-pixel unit SP1a shown in Figures 4A to 4C is that the light-emitting element 151 disposed in the main area M1 is a faulty light-emitting element. Therefore, the sub-pixel unit SP1a can be obtained by repairing the sub-pixel unit SP1. The sub-pixel unit SP1a also includes two light-emitting elements 151' disposed in the two sub-areas A1 and A2 respectively, and the sub-pixel unit SP1a uses these two light-emitting elements 151' to emit light.

[0052] Referring to Figure 4B, in some embodiments, the electrodes E1 and E2 of the light-emitting element 151' are electrically connected to the pads 130 and 140 respectively via connectors 161 and 171. The connectors 161 and 171 may be made of conductive adhesive or other suitable conductive bonding materials.

[0053] Please refer to Figure 4C. Since the two light-emitting elements 151 located in the main regions M1 and M2 are connected in series between the high potential VH and the low potential VL, if the light-emitting element 151 located in the main region M1 fails, even if the light-emitting element 151 located in the main region M2 is a good product, it cannot be lit. Therefore, it is not necessary to remove the light-emitting element 151 in the main region M2. In addition, by repairing the process, the two light-emitting elements 151' located in the two sub-regions A1 and A2 are connected in series between the high potential VH and the low potential VL. The current C from the high potential VH can first flow through the light-emitting element 151' in the sub-region A1, and then flow through the light-emitting element 151' in the sub-region A2, thereby lighting up the light-emitting elements 151' in the sub-regions A1 and A2.

[0054] It is worth mentioning that when the two light-emitting elements 151 located in the main area M1 and M2 as shown in Figure 1B are changed to the two light-emitting elements 151' located in the sub-area A1 and A2 as shown in Figure 4A, the center position of the light-emitting pattern of the sub-pixel unit will not change significantly.

[0055] FIG5 is another circuit diagram of a sub-pixel unit SP1a of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Compared with the circuit of sub-pixel unit SP1a shown in FIG4C, the main difference of the circuit of sub-pixel unit SP1a shown in FIG5 is that the light-emitting element 151 disposed in the main area M2 is a faulty light-emitting element. Therefore, even if the light-emitting element 151 located in the main area M1 is a good one, it cannot be lit. Therefore, it is not necessary to remove the light-emitting element 151 in the main area M1. In addition, the two light-emitting elements 151' disposed in the two sub-areas A1 and A2 through the repair process are connected in series between the high potential VH and the low potential VL. The current C from the high potential VH can flow through the light-emitting elements 151' in the sub-area A1 and the light-emitting elements 151' in the sub-area A2, thereby lighting up the light-emitting elements 151' in the sub-areas A1 and A2.

[0056] FIG6 is another circuit diagram of a sub-pixel unit SP1a of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Compared with the circuit of the sub-pixel unit SP1a shown in FIG4C, the main difference of the circuit of the sub-pixel unit SP1a shown in FIG6 is that the light-emitting elements 151 disposed in the two main areas M1 and M2 are both faulty light-emitting elements. Therefore, it is not necessary to remove the light-emitting elements 151. Instead, the two light-emitting elements 151' disposed in the two sub-areas A1 and A2 are connected in series between the high potential VH and the low potential VL through the repair process. The current C from the high potential VH can flow through the light-emitting elements 151' in the sub-areas A1 and A2, so that the light-emitting elements 151' in the sub-areas A1 and A2 are lit up.

[0057] FIG7 is another circuit diagram of a sub-pixel unit SP1a of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Compared with the circuit of sub-pixel unit SP1a shown in FIG6, the main difference of the circuit of sub-pixel unit SP1a shown in FIG7 is that: the pads 130 in the main areas M1 and M2 and the pads 130 in the sub-areas A1 and A2 can be connected in parallel to a high potential VH, and the pads 140 in the main areas M1 and M2 and the pads 140 in the sub-areas A1 and A2 can be connected in parallel to a low potential VL. Since the light-emitting elements 151 disposed in the two main areas M1 and M2 are both faulty light-emitting elements, it is not necessary to remove the light-emitting elements 151. In addition, two light-emitting elements 151', which are respectively located in sub-regions A1 and A2 and are capable of normal operation, are connected in parallel between the high potential VH and the low potential VL. The current C from the high potential VH can flow through the light-emitting elements 151' in sub-regions A1 and A2 and light up the light-emitting elements 151' in sub-regions A1 and A2.

[0058] FIG8A is a top view schematic diagram of a sub-pixel unit SP1b of a pixel unit PX of a display device 10 according to an embodiment of the present invention. FIG8B is a circuit schematic diagram of a sub-pixel unit SP1b of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Referring to FIGS. 1A to 1B and FIG8A to 8B, the display device 10 includes a plurality of pixel units PX arranged in an array on a circuit board 110. In some embodiments, the pixel unit PX includes sub-pixel units SP1b, SP2, and SP3. In other words, the pixel unit PX can use the sub-pixel unit SP1b shown in FIG8A to replace the sub-pixel unit SP1 shown in FIG1B. The sub-pixel unit SP1b has two main regions M1 and M2 and two sub-regions A1 and A2, and includes a circuit board 110 and pads 130 and 140.

[0059] Compared with the sub-pixel unit SP1 shown in Figures 1B and 3, the main difference of the sub-pixel unit SP1b shown in Figures 8A to 8B is that the sub-pixel unit SP1b can be obtained by repairing the sub-pixel unit SP1. The sub-pixel unit SP1b also includes two light-emitting elements 151' that are normally functioning and respectively disposed in sub-regions A1 and A2. The two light-emitting elements 151' are connected in parallel between the high potential VH and the low potential VL. The current C from the high potential VH can flow through the light-emitting elements 151' in sub-regions A1 and A2 to light up the light-emitting elements 151' in sub-regions A1 and A2. The sub-pixel unit SP1b uses these two light-emitting elements 151' to emit light. In addition, the light-emitting element 151 transferred to the main area M1 by mass transfer is a faulty light-emitting element and therefore does not need to be removed. However, when the light-emitting element 151 transferred to the main area M2 by mass transfer is a good one, the light-emitting element 151 of the main area M2 must be removed to prevent the light-emitting element 151 of the main area M2 from being lit up under the parallel circuit and interfering with the operation of the sub-pixel unit SP1b.

[0060] Referring also to FIG1C, in some embodiments, laser light can be used to illuminate the arrangement areas of connectors 160, 170, pads 130, 140 and / or light-emitting element 151 to separate connector 160 from pad 130 and connector 170 from pad 140, thereby removing light-emitting element 151. In some embodiments, after removing light-emitting element 151, pads 130 and 140 remain on circuit board 110.

[0061] FIG9A is a top view schematic diagram of a sub-pixel unit SP1c of a pixel unit PX of a display device 10 according to an embodiment of the present invention. FIG9B is a circuit schematic diagram of a sub-pixel unit SP1c of a pixel unit PX of a display device 10 according to an embodiment of the present invention. Referring to FIGS. 1A to 1B and FIGS. 9A to 9B, the display device 10 includes a plurality of pixel units PX arranged in an array on a circuit board 110. In some embodiments, the pixel unit PX includes sub-pixel units SP1c, SP2, and SP3. In other words, the pixel unit PX can use the sub-pixel unit SP1c shown in FIG9A to replace the sub-pixel unit SP1 shown in FIG1B. The sub-pixel unit SP1c has two main regions M1 and M2 and two sub-regions A1 and A2, and includes a circuit board 110 and pads 130 and 140.

[0062] Compared with the sub-pixel unit SP1 shown in Figures 1B and 3, the main difference of the sub-pixel unit SP1c shown in Figures 9A to 9B is that the sub-pixel unit SP1c can be obtained by repairing the sub-pixel unit SP1. The sub-pixel unit SP1c also includes two light-emitting elements 151' that are normally functioning and respectively disposed in sub-regions A1 and A2. The two light-emitting elements 151' are connected in parallel between the high potential VH and the low potential VL. The current C from the high potential VH can flow through the light-emitting elements 151' in sub-regions A1 and A2 to light up the light-emitting elements 151' in sub-regions A1 and A2. The sub-pixel unit SP1c uses these two light-emitting elements 151' to emit light. In addition, the light-emitting element 151 transferred to the main area M2 by mass transfer is a faulty light-emitting element and therefore does not need to be removed. However, the light-emitting element 151 transferred to the main area M1 by mass transfer is a good one and therefore must be removed from the main area M1 to prevent the light-emitting element 151 in the main area M1 from being lit up under the parallel circuit and interfering with the operation of the sub-pixel unit SP1c.

[0063] It is worth mentioning that if any of the light-emitting elements 151 located in the main areas M1 and M2 of the sub-pixel units SP1a, SP1b or SP1c fails, and the two light-emitting elements 151' located in the sub-areas A1 and A2 are lit instead, the light-emitting elements 151 located in the main areas M1 and M2 can also be removed at the same time.

[0064] FIG10 is a schematic diagram showing that all sub-pixel units SP1, SP1b, and SP1c of some pixel units PX of a display device 10 according to an embodiment of the present invention are fully lit. Referring to FIG10, when the two light-emitting elements 151 disposed in the main areas M1 and M2 by mass transfer are normal light-emitting elements, there is a sub-pixel unit SP1 in the pixel unit PX, wherein the sub-pixel unit SP1 uses the two light-emitting elements 151 to emit light (the light-emitting elements are represented by a star pattern), and the center position of the light-emitting pattern of the two light-emitting elements 151 is approximately located at the intersection point CP. When at least one of the two light-emitting elements 151 set in the main areas M1 and M2 via mass transfer is a faulty light-emitting element, there is a sub-pixel unit SP1b or sub-pixel unit SP1c in the pixel unit PX. The sub-pixel units SP1b and SP1c emit light using two light-emitting elements 151' set in the sub-areas A1 and A2 via a repair process (the light-emitting elements are represented by a star pattern), and the center of the light-emitting pattern of these two light-emitting elements 151' is also roughly located at the intersection point CP. As can be seen from Figure 10, the intersection point CP of the sub-pixel units SP1, SP1b, and SP1c located in the same row can be roughly arranged into a vertical straight line LL. It is worth noting that, whether the light-emitting elements located in the main areas M1 and M2 are lit, or the light-emitting elements located in the sub-areas A1 and A2 are lit, the center positions of the light-emitting patterns of the sub-pixel units SP1, SP1b, and SP1c located in the same row in the display device 10 are approximately on a straight line. Therefore, it is possible to avoid bright spots and / or dark spots in the display device 10 due to the repair of the light-emitting elements.

[0065] FIG11 is a top view schematic diagram of a pixel unit PXa of a display device 20 according to an embodiment of the present invention. Referring to FIG11, the display device 20 includes a plurality of pixel units PXa arranged in an array on a circuit board 110. Compared with the pixel unit PX shown in FIG1B, the pixel unit PXa shown in FIG11 is mainly different in that: each pixel unit PXa includes sub-pixel units SP1, SP2a, and SP3. The sub-pixel unit SP2a may have two main regions M1 and M2 and two sub-regions A1 and A2, similar to the sub-pixel unit SP1. The sub-pixel unit SP2a may include pads 130 and 140 disposed in each main region M1 and M2 and each sub-region A1 and A2.

[0066] In some embodiments, the sub-pixel unit SP2a includes two light-emitting elements 152 respectively disposed in two main regions M1 and M2 and capable of normal operation, and there are no light-emitting elements in the two sub-regions A1 and A2. In some embodiments, the sub-pixel unit SP2a includes two normal light-emitting elements 152' respectively disposed in two sub-regions A1 and A2 and two light-emitting elements 152 respectively disposed in two main regions M1 and M2, and at least one of the two light-emitting elements 152 is a faulty light-emitting element. In some embodiments, the sub-pixel unit SP2a includes two normal light-emitting elements 152' respectively disposed in two sub-regions A1 and A2 and a faulty light-emitting element 152 disposed in the main region M1, and there are no light-emitting elements in the main region M2. In some embodiments, the sub-pixel unit SP2a includes two normal light-emitting elements 152' respectively disposed in two sub-regions A1 and A2 and a faulty light-emitting element 152 disposed in the main region M2, and there are no light-emitting elements in the main region M1.

[0067] In some embodiments, since the human eye is more sensitive to green light than to red light, and more sensitive to red light than to blue light, the light-emitting elements 151 and 151' disposed in sub-pixel unit SP1 can be one of green light-emitting diodes and red light-emitting diodes, the light-emitting elements 152 and 152' disposed in sub-pixel unit SP2a can be the other of green light-emitting diodes and red light-emitting diodes, and the light-emitting element 153 disposed in sub-pixel unit SP3 can be a blue light-emitting diode.

[0068] FIG12 is a top view schematic diagram of a pixel unit PXb of a display device 30 according to an embodiment of the present invention. Referring to FIG12, the display device 30 includes a plurality of pixel units PXb arranged in an array on a circuit board 110. Compared with the pixel unit PXa shown in FIG11, the pixel unit PXb shown in FIG12 is mainly different in that: each pixel unit PXb includes sub-pixel units SP1, SP2a, and SP3a. The sub-pixel unit SP3a may have two main regions M1, M2 and two sub-regions A1, A2, similar to the sub-pixel unit SP1 or the sub-pixel unit SP2a. The sub-pixel unit SP3a may include pads 130, 140 disposed in each main region M1, M2 and each sub-region A1, A2.

[0069] In some embodiments, the sub-pixel unit SP3a includes two normal light-emitting elements 153' respectively disposed in two sub-regions A1 and A2 and a faulty light-emitting element 153 disposed in the main region M2, and there are no light-emitting elements in the main region M1.

[0070] In some embodiments, the sub-pixel unit SP3a includes two normal light-emitting elements 153' respectively disposed in two sub-regions A1 and A2 and a faulty light-emitting element 153 disposed in the main region M1, and there are no light-emitting elements in the main region M2 (similar to sub-pixel unit SP1b).

[0071] In some embodiments, the sub-pixel unit SP3a includes two normal light-emitting elements 153' respectively disposed in two sub-regions A1 and A2 and two light-emitting elements 153 respectively disposed in two main regions M1 and M2, and at least one of the two light-emitting elements 153 is a faulty light-emitting element (similar to sub-pixel unit SP1a).

[0072] In some embodiments, the sub-pixel unit SP3a includes two light-emitting elements 153 respectively disposed in two main regions M1 and M2 and capable of normal operation, and there are no light-emitting elements in the sub-regions A1 and A2 (similar to the sub-pixel unit SP1).

[0073] In some embodiments, the long side direction of the light-emitting element 152 of the sub-pixel unit SP2a may be substantially the same as the long side direction of the light-emitting element 151 of the sub-pixel unit SP1. In some embodiments, the long side direction of the light-emitting element 153 of the sub-pixel unit SP3a may be substantially the same as the short side direction of the light-emitting element 151 of the sub-pixel unit SP1.

[0074] FIG13 is a top view schematic diagram of a pixel unit PXc of a display device 40 according to an embodiment of the present invention. Referring to FIG13, the display device 40 includes a plurality of pixel units PXc arranged in an array on a circuit board 110. Compared with the pixel unit PX shown in FIG1B, the pixel unit PXc shown in FIG13 is mainly different in that each pixel unit PXc includes one sub-pixel unit SP1, two sub-pixel units SP2, and two sub-pixel units SP3. In some embodiments, the sub-pixel units SP2 and SP3 may be alternately arranged on one side of the sub-pixel unit SP1 along the long side direction of the light-emitting element 151 of the sub-pixel unit SP1.

[0075] In summary, the display device of the present invention, by designing two main areas and two sub-areas in the sub-pixel unit and making the virtual connection between the two main areas intersect with the virtual connection between the two sub-areas, can avoid the generation of bright spots and / or dark spots after the repair process of the light-emitting elements, thereby improving the maintainability of the display device.

[0076] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims. [Simplified Explanation of the Diagram]

[0077] FIG1A is a top view schematic diagram of a display device 10 according to an embodiment of the present invention. FIG1B is an enlarged schematic diagram of the pixel unit PX of the display device 10 of FIG1A. FIG1C is a cross-sectional schematic diagram taken along section line A-A' of FIG1B. FIG1D is a cross-sectional schematic diagram taken along section line B-B' of FIG1B. FIG2 is a circuit schematic diagram of a sub-pixel unit SP1 of the pixel unit PX of the display device 10 according to an embodiment of the present invention. FIG3 is another circuit schematic diagram of a sub-pixel unit SP1 of the pixel unit PX of the display device 10 according to an embodiment of the present invention. FIG4A is a top view schematic diagram of a sub-pixel unit SP1a of the pixel unit PX of the display device 10 according to an embodiment of the present invention. FIG4B is a cross-sectional schematic diagram taken along section line C-C' of FIG4A. FIG4C is a circuit schematic diagram of a sub-pixel unit SP1a of the pixel unit PX of the display device 10 according to an embodiment of the present invention. Figure 5 is another circuit diagram of a sub-pixel unit SP1a of a pixel unit PX in a display device 10 according to an embodiment of the present invention. Figure 6 is another circuit diagram of a sub-pixel unit SP1a of a pixel unit PX in a display device 10 according to an embodiment of the present invention. Figure 7 is another circuit diagram of a sub-pixel unit SP1a of a pixel unit PX in a display device 10 according to an embodiment of the present invention. Figure 8A is a top view of a sub-pixel unit SP1b of a pixel unit PX in a display device 10 according to an embodiment of the present invention. Figure 8B is a circuit diagram of a sub-pixel unit SP1b of a pixel unit PX in a display device 10 according to an embodiment of the present invention. Figure 9A is a top view of a sub-pixel unit SP1c of a pixel unit PX in a display device 10 according to an embodiment of the present invention. Figure 9B is a circuit diagram of a sub-pixel unit SP1c of a pixel unit PX in a display device 10 according to an embodiment of the present invention. Figure 10 is a schematic diagram showing all sub-pixel units SP1, SP1b, and SP1c of some pixel units PX in a display device 10 according to an embodiment of the present invention lit up. Figure 11 is a top view schematic diagram of pixel unit PXa in a display device 20 according to an embodiment of the present invention. Figure 12 is a top view schematic diagram of pixel unit PXb in a display device 30 according to an embodiment of the present invention. Figure 13 is a top view schematic diagram of pixel unit PXc in a display device 40 according to an embodiment of the present invention.

Claims

1. A display device, comprising: Multiple pixel units are arranged in an array, and each pixel unit includes multiple sub-pixel units, wherein a first sub-pixel unit has two first main areas and two first sub-areas, and a first virtual connection between the two first main areas intersects with a second virtual connection between the two first sub-areas, wherein the first sub-pixel unit includes two first light-emitting elements, the two first light-emitting elements are respectively disposed in the two first main areas, and the two first light-emitting elements have the same light color.

2. The display device as claimed in claim 1, wherein the two first main areas and the two first sub-areas are arranged in a 2x2 array.

3. The display device as claimed in claim 1, wherein the first virtual connection intersects the second virtual connection at an intersection point, and the intersection points of the plurality of first sub-pixel units of the plurality of pixel units are arranged in a straight line.

4. The display device as claimed in claim 1, wherein the two first light-emitting elements disposed in the two first main regions are connected in series or in parallel between a high potential and a low potential.

5. The display device as claimed in claim 1, wherein the first sub-pixel unit further includes two additional first light-emitting elements, the two additional first light-emitting elements being respectively disposed in the two first sub-regions.

6. The display device as claimed in claim 5, wherein the other two first light-emitting elements disposed in the two first sub-regions are connected in series or in parallel between a high potential and a low potential.

7. The display device as claimed in claim 5, wherein at least one of the two first light-emitting elements disposed in the two first main areas fails.

8. The display device as claimed in claim 1, wherein the second sub-pixel unit of the plurality of sub-pixel units has two second main areas and two second sub-areas, and a third virtual connection between the two second main areas intersects with a fourth virtual connection between the two second sub-areas.

9. The display device as claimed in claim 8, wherein the second sub-pixel unit includes two second light-emitting elements, and the two second light-emitting elements are respectively disposed in the two second main areas or the two second sub-areas.

10. The display device of claim 8, wherein a third sub-pixel unit of the plurality of sub-pixel units has a third main region and a third sub-region, and a third light-emitting element of the third sub-pixel unit is disposed in the third main region or the third sub-region.

11. The display device of claim 8, wherein a third sub-pixel unit among a plurality of sub-pixel units has two third main regions and two third sub-regions, and a fifth virtual connection between the two third main regions intersects with a sixth virtual connection between the two third sub-regions.

12. The display device of claim 1, wherein the second sub-pixel unit of the plurality of sub-pixel units has a second main area and a second sub-area, the third sub-pixel unit of the plurality of sub-pixel units has a third main area and a third sub-area, and each of the pixel units includes one first sub-pixel unit, two second sub-pixel units and two third sub-pixel units.

13. The display device as claimed in claim 12, wherein the second sub-pixel unit and the third sub-pixel unit are alternately disposed on one side of the first sub-pixel unit along a direction.

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