Patent Publication Number: US-2022223658-A1

Title: Electronic device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation application of U.S. application Ser. No. 16/395,272, filed on Apr. 26, 2019. The content of the application is incorporated herein by reference. 
    
    
     BACKGROUND OF THE DISCLOSURE 
     1. Field of the Disclosure 
     The present disclosure relates to an electronic device, and more particularly to an electronic device with increased brightness uniformity. 
     2. Description of the Prior Art 
     The display devices are widely used. As the size of the display device increases, the brightness uniformity decreases and the quality of the display device are affected. Therefore, efforts are being made to improve the brightness uniformity of the display devices. 
     SUMMARY OF THE DISCLOSURE 
     According to an embodiment, the present disclosure provides an electronic device having a peripheral region. The electronic device includes a first diode, a second diode, an auxiliary electrode and a peripheral pad. The second diode is disposed adjacent to the first diode. The auxiliary electrode is electrically connected to the first diode and the second diode. The peripheral pad is disposed in the peripheral region. The peripheral pad is electrically connected to the auxiliary electrode through a plurality of connection portions. 
     According to another embodiment, the present disclosure provides an electronic device having a peripheral region. The electronic device includes a first diode, a second diode, an auxiliary electrode and a peripheral pad. The second diode is disposed adjacent to the first diode. A portion of the auxiliary electrode is disposed between the first diode and the second diode in a top view of the electronic device. The peripheral pad is disposed in the peripheral region. The peripheral pad is electrically connected to the auxiliary electrode through a plurality of connection portions. 
     These and other objectives of the present disclosure will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the embodiment that is illustrated in the various figures and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram showing a top view of a display device according to a first embodiment of the present disclosure. 
         FIG. 2  is a schematic diagram showing a cross-sectional view of a display device according to the first embodiment of the present disclosure. 
         FIG. 3  is a schematic diagram showing a cross-sectional view of a light emitting layer according to the first embodiment of the present disclosure. 
         FIG. 4  is a schematic diagram showing a top view of a light conversion layer, an auxiliary electrode and a light shielding layer of a display device according to the first embodiment of the present disclosure. 
         FIG. 5  is a schematic diagram showing a top view of sub-pixels and auxiliary electrodes of a display device according to another embodiment of the present disclosure. 
         FIG. 6  is a schematic diagram showing a top view of sub-pixels and auxiliary electrodes of a display device according to another embodiment of the present disclosure. 
         FIG. 7  is a schematic diagram showing a top view of sub-pixels and auxiliary electrodes of a display device according to another embodiment of the present disclosure. 
         FIG. 8  is a schematic diagram showing a cross-sectional view of a display device according to a second embodiment of the present disclosure. 
         FIG. 9  is a schematic diagram showing a cross-sectional view of a display device according to a third embodiment of the present disclosure. 
         FIG. 10  is a schematic diagram showing a cross-sectional view of a display device according to a fourth embodiment of the present disclosure. 
         FIG. 11  is a schematic diagram showing a cross-sectional view of a display device according to a fifth embodiment of the present disclosure. 
         FIG. 12  is a schematic diagram showing a cross-sectional view of a display device according to a sixth embodiment of the present disclosure. 
         FIG. 13  is a schematic diagram showing a cross-sectional view of a display device according to a seventh embodiment of the present disclosure. 
         FIG. 14  is a schematic diagram showing a cross-sectional view of a display device according to an eighth embodiment of the present disclosure. 
         FIG. 15  is a schematic diagram showing a cross-sectional view of a display device according to a ninth embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The present disclosure may be understood by reference to the following detailed description, taken in conjunction with the drawings as described below. It is noted that, for purposes of illustrative clarity and being easily understood by the readers, various drawings of this disclosure show a portion of a display device in this disclosure, and certain elements in various drawings may not be drawn to scale. In addition, the number and dimension of each device shown in drawings are only illustrative and are not intended to limit the scope of the present disclosure. 
     Certain terms are used throughout the description and following claims to refer to particular components. As one skilled in the art will understand, electronic equipment manufacturers may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms “include”, “comprise” and “have” are used in an open-ended fashion, and thus should be interpreted to mean “include, but not limited to . . . ”. Thus, when the terms “include”, “comprise” and/or “have” are used in the description of the present disclosure, the corresponding features, areas, steps, operations and/or components would be pointed to existence, but not limited to the existence of one or a plurality of the corresponding features, areas, steps, operations and/or components. 
     When the corresponding component such as layer or area is referred to “on another component (or the variant thereof)” or “extend to another component”, it may be directly on another component or directly extend to another component, or other component may exist between them. On the other hand, when the component is referred to “directly on another component (or the variant thereof)” or “directly extend to another component”, any component does not exist between them. 
     It will be understood that when an element or layer is referred to as being “connected to” or “contacted with” another element or layer, it can be directly connected to (or directly contacted with) the other element or layer, or intervening elements or layers may be presented. In contrast, when an element is referred to as being “directly connected to” or “directly contacted with” another element or layer, there are no intervening elements or layers presented. In addition, when the component is referred to “be coupled to/with another component (or the variant thereof)”, it may be directly connected to another component, or may be indirectly connected to another component through other component. In contrast, when an element is referred to as being “disposed on” or “disposed above” B 1  element, it may be directly disposed on (or disposed above) B 1  element, or may be indirectly disposed on (or disposed above) B 1  element through other component. In contrast, when an element is referred to as being “disposed between” B 1  element and B 2  element, it may be directly disposed between B 1  element and B 2  element, or may be indirectly disposed between B 1  element and B 2  element through other component. 
     It will be understood that when “a portion of a structure” is between another two components, this structure can be totally between or partially between these components. 
     The terms “about”, “substantially”, “equal”, or “same” generally mean within 20% of a given value or range, or mean within 10%, 5%, 3%, 2%, 1%, or 0.5% of a given value or range. 
     Although terms such as first, second, third, etc., maybe used to describe diverse constituent elements, such constituent elements are not limited by the terms. The terms are used only to discriminate a constituent element from other constituent elements in the specification. The claims may not use the same terms, but instead may use the terms first, second, third, etc. with respect to the order in which an element is claimed. Accordingly, in the following description, a first constituent element may be a second constituent element in a claim. 
     It should be noted that the technical features in different embodiments described in the following can be replaced, recombined, or mixed with one another to constitute another embodiment without departing from the spirit of the present disclosure. 
     In the present disclosure, the display device may be such as a LEDs (light-emitting diodes) display, a micro-LEDs display, a mini-LEDs display, an OLEDs (organic light-emitting diodes) display, a quantum dots LEDs (QLEDs or QD-LEDs) display, a flexible display or any other suitable display. 
     Referring to  FIG. 1  to  FIG. 4 ,  FIG. 1  is a schematic diagram showing a top view of a display device according to a first embodiment,  FIG. 2  is a schematic diagram showing a cross-sectional view of a display device according to the first embodiment,  FIG. 3  is a schematic diagram showing a cross-sectional view of a light emitting layer according to the first embodiment, and  FIG. 4  is a schematic diagram showing a top view of a light conversion layer, an auxiliary electrode and a light shielding layer of a display device according to the first embodiment, wherein  FIG. 2  only shows a first sub-pixel SP 1 , a second sub-pixel SP 2  and a third sub-pixel SP 3 , but not limited thereto. As shown in  FIG. 1 , the display device  100  includes a display region  110   a  and a peripheral region  110   b , and the peripheral region ll 0   b  is situated at one or more side(s) of the display region  110   a  and configured to dispose such as driving circuit(s), integrated circuit(s), peripheral pad(s) and/or peripheral wire(s) thereon. In some embodiment, the peripheral region  110   b  may surround the display region  110   a , but not limited thereto. A plurality of pixels are disposed in and correspond to the display region  110   a , the display region  110   a  may be defined by a region includes all sub-pixels. It should be noted that the scope or position of the display region  110   a  (and/or a peripheral region  110   b ) are only for example, but not limited thereto. In some embodiment, one pixel may include a plurality of sub-pixels. For example, the pixel may include a sub-pixel R emitting red light, a sub-pixel G emitting green light and/or a sub-pixel B emitting blue light, but not limited thereto. Note that, in the peripheral region  110   b ,  FIG. 1  only shows two peripheral wires PW and two peripheral pads PB, and omits other components to make  FIG. 1  simple and clear, the peripheral wires PW disposed in the peripheral region  110   b  are electrically connected with the peripheral pads PB disposed in the peripheral region  110   b , and the material of the peripheral wires PW may be the same as or different from the material of the peripheral pads PB. 
     As shown in  FIG. 1  and  FIG. 2 , the display device  100  includes a substrate  110 , a circuit layer structure CL, a plurality of light emitting units LU (such as the first light emitting unit LU 1 , the second light emitting unit LU 2  and the third light emitting unit LU 3 ) , a pixel defining layer PDL, at least one auxiliary electrode AE, a plurality of light conversion layers  170  and a light shielding layer  180 , but not limited thereto. The display device  100  may further include an opposite substrate  160 , wherein the circuit layer structure CL, the light emitting units LU, the pixel defining layer PDL, the auxiliary electrode AE, the light conversion layers  170  and the light shielding layer  180  are disposed between the substrate  110  and the opposite substrate  160 , but not limited thereto. The substrate  110  and the opposite substrate  160  may include a hard substrate or a flexible substrate, wherein the hard substrate may include a glass substrate, a plastic substrate, a quartz substrate, a sapphire substrate or other suitable hard substrate, and the flexible substrate may include polyimide (PI), polyethylene terephthalate (PET) and/or other suitable flexible material, but not limited thereto. 
     The circuit layer structure CL is disposed on the substrate  110 , and the light emitting units LU and the pixel defining layer PDL are disposed on the circuit layer structure CL, wherein the circuit layer structure CL is disposed to drive the light emitting units LU for emitting light, and the pixel defining layer PDL is disposed to separate the light emitting units LU from each other to defined different light emitting units LU (such as the first light emitting unit LU 1 , the second light emitting unit LU 2  and the third light emitting unit LU 3 ). In some embodiments, one of the light emitting units LU may be correspond to and be included in one of the sub-pixels (such as the first sub-pixel SP 1  (R), the second sub-pixel SP 2  (G), the third sub-pixel SP 3  (B). In some embodiments, the circuit layer structure CL may include wires, thin film transistors, capacitor or other suitable components, but not limited thereto. The light emitting units LU are electrically connected with the corresponding thin film transistors T. In some embodiments, the circuit layer structure CL may include a first conductive layer  120 , a first insulating layer  122 , a semiconductor layer  124 , a second conductive layer  126  and a second insulating layer  128  disposed on the substrate  110  in sequence, but not limited thereto. Furthermore, a plurality of thin film transistors T, a plurality of data lines (not shown) and a plurality scan lines (not shown) are disposed on the substrate  110 , and the circuit layer structure CL includes the plurality of thin film transistors T, the plurality of data lines (not shown) and the plurality scan lines (not shown). A gate electrode Gt of the thin film transistor T and the scan line may be formed of the same layer (such as the first conductive layer  120 ), but not limited thereto. It should be noted that, when “A is formed of B” are used in the description of the present disclosure, it may include that “A is formed of” B only, or A is formed of B and/or another components or materials. A source electrode St and/or a drain electrode Dt of the thin film transistor T and the data line may be formed of the same layer (such as the second conductive layer  126 ), but not limited thereto. A channel layer CNt of the thin film transistor T may be formed of the same layer (such as the semiconductor layer  124 ), but not limited thereto. 
     As shown in  FIG. 2 , the thin film transistor T may be a bottom gate transistor, but not limited thereto. In some embodiment, the thin film transistor T may include a top gate transistor, a double gate transistor, a dual gate transistor, other suitable transistor or combination thereof, but not limited thereto. The type of the thin film transistor T and the disposition of the components or layers may be adjusted according to requirements. 
     The material of the conductive layers of the circuit layer structure CL may include metal and/or transparent conductive material, wherein the transparent conductive material can include indium tin oxide (ITO), indium zinc oxide (IZO), any other suitable conductive material or combination thereof, but not limited thereto. The material of the insulating layers of the circuit layer may include organic material or inorganic material. The material of the insulating layers of the circuit layer may include silicon oxide, silicon nitride, silicon oxynitride, any other suitable insulating material or combination thereof, but not limited thereto. The material of the semiconductor layer  124  of the circuit layer may include low temperature poly-silicon (LTPS), indium gallium zinc oxide (IGZO), amorphous silicon (a-Si), other suitable materials or combination thereof, but not limited thereto. 
     The light emitting unit LU may include a light emitting diode (LED), a micro-LED, a mini-LED, an organic light-emitting diode (OLED), a quantum dots LED (QLED or QD-LED) or any other suitable light-emitting component, but not limited thereto. The present disclosure uses the OLED to serve as the light emitting units LU for explanation, but the light emitting units LU in the display device may be other type light-emitting components. In  FIG. 2 , one of the light emitting units LU (such as the first light emitting unit LU 1 , the second light emitting unit LU 2  and the third light emitting unit LU 3 ) may include one of a plurality of first electrodes  130 , a portion (such as a second electrode  134   a ) of a second electrode layer  134  and a portion of a light emitting layer  132  disposed between the first electrode  130  and the second electrode 134   a . In some embodiments, the plurality of light emitting units LU may share a light emitting layer  132 , but not limited thereto. In some embodiments, the light emitting layer  132  may disposed corresponding in at least one of the light emitting units LU. The second electrode layer  134  includes a plurality of second electrodes  134   a , the second electrode layer  134  may disposed in the plurality of light emitting units LU. In some embodiments, the second electrode  134   a  may be defined by a portion of the second electrode layer  134  overlapped with the light emitting layer  132  and the corresponding first electrode  130  in a top view direction Z of the display device, wherein the top view direction Z of the display device may be the normal direction of the substrate  110 . The first electrodes  130  are disposed between the light emitting layer  132  and the circuit layer structure CL and electrically connected to the thin film transistors T in the circuit layer structure CL (e.g. the first electrode  130  in  FIG. 2  is electrically connected to the drain electrode Dt of the corresponding thin film transistor T through the connected structure  129 , but not limited thereto). In some embodiments, the first electrode  130  may be an anode electrode, and the second electrode  134   a  maybe a cathode electrode, but not limited thereto. Note that, the first electrode  130  of the first light emitting unit LU 1  may be referred as a first anode electrode, the first electrode  130  of the second light emitting unit LU 2  may be referred as a second anode electrode, and the first electrode  130  of the third light emitting unit LU 3  may be referred as a third anode electrode, but not limited thereto. In some embodiments, the second electrode layer  134  may be an common cathode electrode and be provided a common voltage from the peripheral component through the peripheral wires PW (as shown in  FIG. 1 ). In some embodiments, the material of the first electrode  130  may include metal, transparent conductive material or combination thereof. In some embodiments, the material of the second electrode layer  134  may include transparent conductive material, and the thickness of the second electrode layer  134  may be in a ranges from 20 Å to 800 Å (20 Å≤thickness≤800 Å) or from 20 Å to 300 Å (20 ∈≤thickness≤300 Å), but not limited thereto. 
     As shown in  FIG. 2  and  FIG. 3 , the light emitting layer  132  is disposed to emitting light, and the light emitting layer  132  may include a multi-layer structure, and the number and types of layers included in the light emitting layer  132  may be designed based on requirements. For example, the light emitting layer  132  shown in  FIG. 3  may be disposed between the first electrode  130  and the second electrode layer  134 , and the light emitting layer  132  include at least one hole injection layer HIL, at least one hole transport layer HTL, at least one light-emitting structure LS, at least one electron transport layer ETL and/or at least one electron injection layer EIL sequentially stacked on the first electrode  130 , but not limited thereto. The light emitted from the light emitting unit LU is generated by the light-emitting structure LS. 
     Note that, in  FIG. 2 , the pixel defining layer PDL includes a plurality of pixel defining structures PDS, and the light emitting units LU (such as the first light emitting unit LU 1 , the second light emitting unit LU 2  and the third light emitting unit LU 3 ) is situated between adjacent pixel defining structures PDS. In some embodiment ( FIG. 2 ), the sub-pixels (such as SP 1  (R), SP 2  (G), SP 3  (B)) may be defined by the light shielding structures BM, but not limited thereto. In some embodiment, the display device does not include the light shielding structures BM, and the sub-pixels (such as SP 1  (R), SP 2  (G), SP 3  (B)) may be defined by the pixel defining layer PDL, for example, the pixel defining layer PDL includes a plurality of openings to separate or form the pixel defining structures PDS, and a region of the sub-pixel (such as SP 1  (R), SP 2  (G) and SP 3  (B)) may be defined by a region of the corresponding opening in the top view direction Z of the display device. In some embodiments, the light emitting layer  132  and the second electrode layer  134  may cross over the pixel defining structures PDS to form continuous layers, but not limited thereto. On the other hand, since a portion of the light emitting layer  132  in  FIG. 2  may overlap the pixel defining layer PDL and not correspond to and electrically connected with the first electrode  130 , this portion of the light emitting layer  132  may not emit light. 
     As shown in  FIG. 2 , the light conversion layers  170  and the light shielding layer  180  may be disposed above (or on) the light emitting units LU, and the light conversion layers  170  may be separated by the light shielding layer  180  in the top view direction Z of the display device. The light conversion layers  170  is disposed to convert the color of the light emitting from corresponding light emitting unit(s) LU. For instance, in this embodiment, the light emitting units LU emit blue light (or other color light), and the light conversion layers  170  may convert the blue light (or other color light) to red light, green light or the light with any other suitable color. In some embodiments, the light emitting units LU emit white light, the light conversion layers  170  may convert or filter the white light to red light, green light, blue light or the light with any other suitable color. The material of the light conversion layers  170  may include quantum dots, color filter, phosphorescent materials or any other suitable material, but not limited thereto. In some embodiment ( FIG. 2 ), the light conversion layers  170  may include a first conversion part  172  and a second conversion part  174  disposed on the first conversion part  172 , the first conversion part  172  includes the quantum dots, and the second conversion part  174  includes the color filter, but not limited thereto. In some embodiments, the light emitting units LU may emit blue light, the first conversion part  172  may convert the blue light to red light or green light, but not limited thereto. In some embodiments, the second conversion part  174  may absorb or filter the blue light or other light (such as UV light), but not limited thereto. The light shielding layer  180  may be disposed to shield opaque or reflective components, block the unwanted light and/or separate the sub-pixels from each other. The light shielding layer  180  may include a plurality of light shielding structures BM disposed between the light conversion layers  170  in the top view direction Z of the display device. In some embodiments, the light shielding structure BM may overlap with the corresponding pixel defining structures PDS in the top view direction Z of the display device, but not limited thereto. In some embodiments, the light shielding layer  180  may include a single-layer or a multi-layer structure. For example ( FIG. 2 ), the light shielding layer  180  may have, but not limited to, two sub-layers  182 ,  184 , and the material of the light shielding layer  180  may include a photoresist material, an organic material, a metal material or any other suitable material, but not limited thereto. The material of sub-layers  182 ,  184  may be the same or different. 
     In  FIG. 2 , since the light emitting units LU may emit blue light, the light conversion layers  170  are included in the sub-pixels, such as the first sub-pixel SP 1  (R), the second sub-pixel SP 2  (G), and the light conversion layers  170  are not included in the third sub-pixels SP 3  (B), but not limited thereto. On the other hand, a scattering layer  176  may be included in the third sub-pixel SP 3  (B), and the scattering layer  176  may include a plurality of particles for scattering the blue light, but not limited thereto. In some embodiments, the light emitting units LU may emit blue light or UV light, the light conversion layers  170  are included in the first sub-pixel SP 1  (R), the second sub-pixel SP 2  (G) and the third sub-pixel SP 3  (B), and the blue light or UV light may be converted to the light with suitable wavelengths by the light conversion layers  170 , but not limited thereto. 
     In the present disclosure, the display device  100  includes the auxiliary electrode AE electrically connected with the second electrode  134   a , and the uniformity of the brightness of the display device  100  may be increased. In some embodiments, the auxiliary electrode AE maybe overlapped with a portion of the second electrode layer  134  in the top view direction Z of the display device. In some embodiments, the auxiliary electrode AE is electrically connected with the second electrode layer  134 , and the resistance of the auxiliary electrode AE is less than the resistance of the second electrode layer  134 , such that the uniformity of the brightness may be increased. 
     In some embodiments, the thickness of the auxiliary electrode AE is greater than or equal to 0.1 μm and less than or equal to 0.3 μm, but not limited thereto. In some embodiments, the thickness of the auxiliary electrode AE is greater than or equal to 0.15 μm and less than or equal to 0.2 μm, but not limited thereto. The thickness of the auxiliary electrode AE may be defined by a maximum thickness along the top view direction Z of the display device measured by any SEM image. In some embodiments, the width d 2  of the auxiliary electrode AE is greater than or equal to 1.5 μm and less than or equal to 8 μm (1.5 μm≤d 2 ≤8 μm), but not limited thereto. In some embodiments, the width d 2  of the auxiliary electrode AE is greater than or equal to 3 μm and less than or equal to 5 μm (3 μm≤d 2 ≤5 μm). The width d 2  of the auxiliary electrode AE may be defined by a maximum width measured by any SEM image or OM image. In some embodiments ( FIG. 3  and  FIG. 2 ), the thickness of the auxiliary electrode AE may be greater than the thicknesses of the second electrode layer  134 , the hole injection layer HIL, the hole transport layer HTL, the electron transport layer ETL, the electron injection layer EIL and/or the charge generating layer (not shown in  FIG. 3 ), but not limited thereto. In some embodiments, the thickness of the auxiliary electrode AE may be less than the thicknesses of the first conversion part  172 , the second conversion part  174  and/or the light shielding layer  180 . The above thickness of the layers or components may be defined by a maximum thickness along the top view direction Z of the display device measured by any SEM image. In some embodiments (not shown), the cross-sectional profile of the auxiliary electrode AE may include a triangle, a trapezoid, a rectangle, a polygon, a circle, a shape having curved edge, any other suitable shape or combination thereof, but not limited thereto. In some embodiments, the material of the auxiliary electrode AE may include metal, transparent conductive material, any other suitable conductive material or combination thereof. In some embodiments, the material of the auxiliary electrode AE may be the same as or different from the material of the second electrode layer  134  and/or the first electrode  130 . 
     In some embodiments, a portion of the auxiliary electrode AE may be disposed between two adjacent light emitting units LU in the top view direction Z of the display device. In order to describe in detail, one of the sub-pixels R (red sub-pixels) may be referred as a first sub-pixel SP 1 , one of the sub-pixels G (green sub-pixels) may be referred as a second sub-pixel SP 2 , and one of the sub-pixels B (blue sub-pixels) maybe referred as a third sub-pixel SP 3  (as shown in  FIG. 1  and  FIG. 2 ), wherein the first sub-pixel SP 1 , the second sub-pixel SP 2  and the third sub-pixel SP 3  may be disposed adjacent to the peripheral pad PB disposed in the peripheral region  110   b , and the second sub-pixel SP 2  is disposed between the first sub-pixel SP 1  and the third sub-pixel SP 3 . In some embodiments, as shown in  FIG. 1  and  FIG. 2 , the first sub-pixel SP 1  may include at least one thin film transistor T, a first light emitting unit LU 1  and a first light conversion layer  170   a , the second sub-pixel SP 2  may include at least one thin film transistor T, a second light emitting unit LU 2  and a second light conversion layer  170   b , and the third sub-pixel SP 3  may include at least one thin film transistor T, a third light emitting unit LU 3  and the scattering layer  176 , but not limited thereto. In  FIG. 1 , the top view pattern of the auxiliary electrode AE includes a rectangular pattern with curved corners, the auxiliary electrode AE may surround at least one sub-pixel (or at least one pixel), and the auxiliary electrodes AE may be combined in the mesh shape, but not limited thereto. More specifically, the auxiliary electrode AE may surround (or be adjacent to) the first light conversion layer  170   a , and a portion of the auxiliary electrode AE may be disposed between the first light emitting unit LU 1  in the first sub-pixel SP 1  and the second light emitting unit LU 2  in the second sub-pixel SP 2  in top view direction Z of the display device. In other words, the auxiliary electrode AE has a portion disposed between the first light conversion layer  170   a  and the second light conversion layer  170   b  in the top view direction Z of the display device. 
     In  FIG. 2 , the auxiliary electrode AE may be overlapped with the pixel defining layer PDL and/or the light shielding layer  180  in the top view direction Z of the display device. In some embodiments ( FIG. 2 ), the auxiliary electrode AE is disposed between the pixel defining layer PDL and the light shielding layer  180  in the normal direction Z of the substrate  110 . In some embodiments ( FIG. 2 ), the auxiliary electrode AE is disposed between the pixel defining layer PDL and the second electrode layer  134  in the normal direction Z of the substrate  110 . In some embodiments (not shown), the auxiliary electrode AE is disposed on the second electrode layer  134 . In some embodiments, the width of the auxiliary electrode AE maybe less than the width of the corresponding light shielding structure BM and/or the width of the corresponding pixel defining structure PDS, and the quality of the display device  100  may enhance. In some embodiments, the projected area of the auxiliary electrode AE on the substrate  110  may be less than the projected area of the corresponding light shielding structure BM on the substrate  110  in the top view direction Z of the display device. Note that the projected area of a component is defined by an area of the component projected on the surface of the substrate  110  along the top view direction Z, but not limited thereto. In some embodiments, as shown in  FIG. 2  and  FIG. 4 , a minimum distance d 3  between the auxiliary electrode and the first light conversion layer  170   a  in the top view direction Z of the display device is greater than or equal to 0.5 μm and less than or equal to 10 μm, but not limited thereto. In some embodiments, the light shielding structure BM and the first light conversion layer  170   a  are disposed on the same substrate (such as the opposite substrate  160 ) or different substrates, the minimum distance d 3  between the auxiliary electrode and the first light conversion layer  170   a  may be measured by any SEM image, but not limited thereto. In some embodiments, the light shielding structure BM may overlap with the first light conversion layer  170   a  in the top view direction Z of the display device. 
     In some embodiments, as shown in  FIG. 2  and  FIG. 4 , a distance dl may be defined by a minimum distance between an outline of a projected area of the light shielding structure BM on the substrate  110  and an outline of a projected area of the auxiliary electrode AE on the substrate  110  in the top view direction Z of the display device, and the distance dl is greater than or equal to 0.5 μm and less than or equal to 10 μm (0.5 μm≤d 1 ≤10 μm), but not limited thereto. In some embodiments, the light shielding structure BM and the auxiliary electrode AE are disposed on the same substrate or different substrates, the distance dl may be measured by any SEM image, but not limited thereto. In some embodiments, a ratio of the minimum distance dl to a width d 2  of the auxiliary electrode AE is greater than or equal to 0.06 and less than or equal to 1.4 (0.06≤d 1 /d 2 ≤1.4), but not limited thereto. In some embodiments ( FIG. 2 ), the auxiliary electrode AE maybe not overlapped with the light emitting layer  132  in the top view direction Z of the display device. In some embodiments, the auxiliary electrode AE shown in  FIG. 2  is disposed between the second electrode layer  134  and the light emitting layer  132 . For example, a top surface of the auxiliary electrode AE and/or a side surface of the auxiliary electrode AE may be in contact with the second electrode layer  134 , and the bottom surface of the auxiliary electrode AE may be in contact with the light emitting layer  132 , but not limited thereto. In some embodiment ( FIG. 2 ), the second electrode layer  134  may cover the auxiliary electrode AE. In some embodiments, an anti-oxidizing layer (not shown) may disposed on or cover the auxiliary electrode AE to reduce the oxidation of the auxiliary electrode AE. 
     In some embodiments, the material (such as metal) of the auxiliary electrode AE with the reflective property may reflect the light emitting from the light emitting unit LU to the light conversion layer  170 , and then, the utilization rate of the light maybe enhanced, so as to increase the brightness of the display device  100 . In some embodiments, the reflectivity of the auxiliary electrode AE may be greater than the second electrode layer  134  and/or the conductive layer of the circuit layer structure CL, but not limited thereto. In some embodiments, the cross-sectional profile of the auxiliary electrode AE may be designed based on the required reflective angle of the light. 
     In some embodiments, the auxiliary electrodes AE may have different widths, different thicknesses, different lengths and/or different surrounding areas or projected areas on the substrate  110 . As shown in  FIG. 1 , the peripheral pad PB is electrically connected with the peripheral wire PW and the auxiliary electrode AE. In some embodiments, the auxiliary electrode AE may be in contact with the peripheral pad PB, the signal (e.g. the common voltage, but not limited thereto) may pass through the peripheral wire PW, the peripheral pad PB, the auxiliary electrode AE to the second electrode layer  134  in sequence, but not limited thereto. Thus, in some embodiment ( FIG. 1 ), the width of the auxiliary electrode AE is greater as the distance between the auxiliary electrode AE and the peripheral pad PB is increased, which increases the electrical property of the auxiliary electrode AE. In order to describe in detail, one of the sub-pixels R close to the center of the display region  110   a  may be referred as a fourth sub-pixel SP 4 , and one of the sub-pixels G close to the center of the display region  110   a  may be referred as a fifth sub-pixel SP 5  in  FIG. 1 , and the first sub-pixel SP 1  (R) and the second sub-pixel SP 2  (G) are adjacent to the peripheral pad PB disposed in the peripheral region  110   b , and the first width of the auxiliary electrode AE surrounding the first sub-pixel SP 1  (R) may be less than the second width of the auxiliary electrode AE surrounding the fourth sub-pixel SP 4  (R). In some embodiments, a ratio of the first width to the second width is greater than or equal to 0.1 and less than 1, but not limited thereto. In some embodiments, the width of the auxiliary electrode AE surrounding the second sub-pixel SP 2  (G) may be less than the width of the auxiliary electrode AE surrounding the fifth sub-pixel SP 5  (G). In some embodiments, the peripheral pads PB are disposed on the two opposite sides (such as left side and the right side, but not limited thereto). In another embodiment (not shown), the display device  100  has one peripheral pad PB disposed on the one side (such as left side), the width of the auxiliary electrode AE disposed at the side portion (such as left portion of the display region  110   a ) close to the peripheral pad PB is less than the width of the auxiliary electrode AE disposed at the intermediate portion of the display region  110   a , and the width of the auxiliary electrode AE disposed at the intermediate portion of the display region  110   a  is less than the width of the auxiliary electrode AE disposed at the side portion (such as right portion of the display region  110   a ) away to the peripheral pad PB, but not limited thereto. 
     The top view pattern of the auxiliary electrode AE is not limited by the above content, and may be designed according to the sub-pixel or any other requirement. The auxiliary electrode AE is in one of dot shape, line shape, mesh shape and any other suitable shape or a combination thereof, but not limited thereto. Referring to  FIG. 5  to  FIG. 6 , one pixel includes one sub-pixel R, two sub-pixels G and one sub-pixel B, the sub-pixels R, G, B may be arranged in a pantile type, but not limited thereto. In  FIG. 5 , the pixels are arranged along the first direction X and the second direction Y to form an array, but not limited thereto. The first direction X is different from the second direction Y, and the first direction X and the second direction Y are perpendicular to the normal direction Z of the substrate  110 . The auxiliary electrode AE may be in a mesh shape, and the auxiliary electrode AE may surround at least one of the pixels, but not limited thereto. In another embodiment, the auxiliary electrode AE may surround any suitable number of sub-pixel(s) or pixel(s). As shown in  FIG. 6 , in another embodiment, the arrangements of the sub-pixels and pixels are the same as  FIG. 5 , and the auxiliary electrodes AE may be in the dot shape, but not limited thereto. The corresponding relation between the auxiliary electrode(s) AE and the pixel(s) or the corresponding relation between the auxiliary electrode(s) AE and the sub-pixel(s) may be designed based on requirements. As shown in  FIG. 7 , the auxiliary electrode AE is in the line shape, and at least one sub-pixel may be located between two auxiliary electrodes, but not limited thereto. Moreover, in some embodiments, the display device  100  may include different shaped auxiliary electrodes AE, for example, the auxiliary electrodes AE adjacent to the peripheral pad PB disposed in the peripheral region  110   b  may be in the dot shape, and other auxiliary electrodes AE may be combined in the mesh shape, but not limited thereto. 
     Particularly, the auxiliary electrode AE may be formed by chemical vapor deposition (CVD), physical vapor deposition (PVD), imprinting process or a combination thereof, but not limited thereto. The chemical vapor deposition includes at least one of atmospheric pressure chemical vapor deposition (APCVD), low pressure chemical vapor deposition (LPCVD), aerosol assisted chemical vapor deposition (AACVD), ultra-high vacuum chemical vapor deposition (UHVCVD), direct liquid injection chemical vapor deposition (DLICVD), microwave plasma chemical vapor deposition (MPCVD), metal organic chemical vapor phase deposition (MOCVD), plasma enhanced chemical vapor deposition (PECVD), atomic layer chemical vapor deposition (ALCVD), hybrid physical-chemical vapor deposition (HPCVD), hot-wire chemical vapor deposition (HWCVD), rapid-thermal chemical vapor deposition (RTCVD) or any other chemical vapor deposition. The physical vapor deposition may include at least one of a vacuum evaporation process, a sputtering process, an ion plating process and any other physical vapor deposition. Regarding the imprinting process, a stamp is formed first, wherein the stamp may have at least one concave structure and/or at least one convex structure. The material of the stamp may be any suitable material, such as polydimethylsiloxane (PDMS). Next, in some embodiment, ink solution is spread on the convex structure of the stamp, and then, the stamp prints the ink on the conductive layer configured to form the auxiliary electrode (s) AE. In this case, the ink is served as a mask. Then, performing an etch process to remove the part(s) of the conductive layer which do(es) not overlap the ink, so as to forming the auxiliary electrode(s) AE. In another embodiment, the conductive ink may be disposed on the substrate  110 , and then, the stamp is pressed on the conductive ink to imprint the conductive ink to be the auxiliary electrode AE. In another embodiment, the conductive ink may be disposed in the concave structure of the stamp and make it be cured, and then, the stamp imprints the substrate  110  with the cured conductive ink, so as to form the auxiliary electrode AE. The aforementioned imprinting processes are only examples, and any other suitable imprinting process may be used in the present disclosure. 
     In some embodiments, in  FIG. 2 , an array substrate structure and an opposite substrate structure are included in the display device  100 , wherein the array substrate structure is formed on the substrate  110 , and the opposite substrate structure is formed on the opposite substrate  160 . In some embodiments, the array substrate structure may include the circuit layer structure CL, the light emitting units LU, the pixel defining layer PDL and the auxiliary electrode AE, but not limited thereto. In some embodiments, the opposite substrate structure may include the light conversion layers  170  and the light shielding layer  180 , but not limited thereto. In some embodiment, the array substrate structure may include a protecting layer  140  and a first flattening layer  150 , the protecting layer  140  may be disposed on the light emitting units LU and/or the auxiliary electrode AE for protecting the components and/or structures below the protecting layer  140 , and the first flattening layer  150  is disposed on the protecting layer  140  for flattening the surface of the array substrate structure, but not limited thereto. The opposite substrate structure may include a second flattening layer  190 , the light conversion layers  170  and the light shielding layer  180  may disposed between the second flattening layer  190  and the opposite substrate  160 , and the second flattening layer  190  may be disposed to flatten the surface of the opposite substrate structure. The material of the protecting layer  140 , the first flattening layer  150  and the second flattening layer  190  may individually include any suitable insulating material, and the material of the protecting layer  140  may include at least one inorganic insulating layer and/or at least one organic insulating layer, but not limited thereto. For example, the material of the first flattening layer  150  and the material of the second flattening layer  190  may have the same refractive index or similar refractive indexes (such as 1.3˜1.6). In some embodiment, a different of the refractive index of the first flattening layer  150  and the refractive index of the second flattening layer  190  may be in a range between 0 to 0.3 (0≤Δn≤0.3), but not limited thereto. In some embodiment, the protecting layer  140  may be a single-layer structure or multi-layer structure, and the protecting layer  140  may include at least one inorganic insulating layer and/or at least one organic insulating layer, for example, the protecting layer  140  may include two inorganic insulating layers and one organic insulating layer disposed between two inorganic insulating layers, but not limited thereto. In another embodiment, the first flattening layer  150  and the material of the second flattening layer  190  may include at least one inorganic insulating layer and/or at least one organic insulating layer. In some embodiment, the opposite substrate structure may further include a bragg layer GL disposed adjacent to the light conversion layer  170 , and the bragg layer GL is disposed between the light conversion layer  170  and the light emitting units LU. In some embodiments, the bragg layer GL may be disposed between the light conversion layer  170  and the second flattening layer  190 , wherein the reflective light caused by the light conversion layer  170  and/or the scattering layer  176  may be hard to pass through the bragg layer GL, such that the utilization of the light is increased. In some embodiments, the bragg layer GL may penetrate lights with some wavelengths, and reflect lights with other wavelengths. For example, the bragg layer GL may penetrate the blue light, and the bragg layer GL may reflect light with other color. In some embodiment, the opposite substrate structure may further includes an optical layer OL disposed on the opposite substrate  160 , and the optical layer OL may include polarizer, anti-reflection layer, anti-glare layer, light diffusion layer, privacy protection layer, privacy filter, anti-peep layer or scratch resistant layer, but not limited thereto. Apart from the above, the display device  100  may further include any other suitable layer or component. 
     The assembling process of the substrate  110  with the array substrate structure and the opposite substrate  160  with the opposite substrate structure maybe any suitable method. In some embodiments, the substrate  110  with the array substrate structure and the opposite substrate  160  with the opposite substrate structure maybe assembled by a sealant disposed in the peripheral region  110   b , and an air gap AG may exist between the array substrate structure and the opposite substrate structure, but not limited thereto. If the air gap AG exists between the first flattening layer  150  and the second flattening layer  190 , when the light emitted from the light emitting unit LU passes through the first flattening layer  150 , the air gap AG and the second flattening layer  190  in sequence, the path of the light may be adjusted according to the second flattening layer  190  and air gap AG. For example, the path of the light may be adjusted according to the different of the refractive indexes of the air and the second flattening layer  190 , such as the scattering rate (or angle) of the light, the reflecting (or angle) of the light and/or the refracting (or angle) of the light may be adjusted. In some embodiments, the display device  100  has at least one protrusion structure disposed between the opposite substrate  160  and the auxiliary electrode AE, wherein the protrusion structure may be corresponding to or overlapped with the auxiliary electrode AE in the top view direction Z of the display device. In some embodiments, the first flattening layer  150  includes the protrusion structure PS 1 . In some embodiments, the protrusion structure PS 2  is included in the opposite substrate structure, for example, the second flattening layer  190  includes the protrusion structure PS 2 . The protrusion structures PS 1 , PS 2  may be disposed to release the stress or mitigate the deformation of the display device  100 . In another embodiment, the protrusion structures PS 1 , PS 2  may be served as spacers, but not limited thereto. 
     The display device of the present disclosure is not limited to the above embodiments. Further embodiments of the present disclosure are described below. For ease of comparison, same components will be labeled with the same symbol in the following. The following descriptions relate the differences between each of the embodiments, and repeated parts will not be redundantly described. Note that,  FIG. 8  to  FIG. 15  only show the first sub-pixel SP 1  and the second sub-pixel SP 2  and omit the optical layer OL, and the light shielding structure BM is a single-layer structure to make the figures simple and clear. In some embodiment, an overcoat layer is disposed between the array substrate structure and the opposite substrate structure (e.g. between the first flattening layer  150  and the second flattening layer  190 ) to protect the components and/or structures in the display device. In some embodiments, the overcoat layer may have an adhesive property, the array substrate structure and the opposite substrate structure may be assembled more rigidly. 
     Referring to  FIG. 8 ,  FIG. 8  is a schematic diagram showing a cross-sectional view of a display device according to a second embodiment of the present disclosure. As shown in  FIG. 8 , the difference between the first embodiment and second embodiment is that the auxiliary electrode AE of the display device  200  is disposed on the second electrode layer  134 . In  FIG. 8 , the bottom surface of the auxiliary electrode AE is in contact with the second electrode layer  134 , but not limited thereto. In  FIG. 8 , the display device  200  does not include the protecting layer  140 , the first flattening layer  150  and/or the second flattening layer  190 . The display device  200  uses the overcoat layer  210  to protect the components and structures of the display device  200 . In  FIG. 8 , the auxiliary electrode AE may be served as a spacer between the array substrate structure and the opposite substrate structure, and the auxiliary electrode AE may include organic materials, conductive materials (such as conductive particles), but not limited thereto. In some embodiments, the opposite substrate structure may further include a transparent conductive layer  310 , the transparent conductive layer  310  is disposed between the light shielding layer  180  and the auxiliary electrode AE, and the auxiliary electrode AE is electrically connected with the transparent conductive layer  310 . In some embodiments, the auxiliary electrode AE may be in contact with the transparent conductive layer  310 . In some embodiments, the signal (e.g. the common voltage) may pass through the peripheral wire PW, the peripheral pad PB, the transparent conductive layer  310 , the auxiliary electrode AE to the second electrode layer  134  in sequence, but not limited thereto. In some embodiments, the transparent conductive layer  310  may increase the electrical property (or reduce the resistance) of the second electrode layer  134  (such as common cathode electrode). In some embodiments ( FIG. 2  and  FIG. 8 ), the light emitting layer  132  may be a continuously layer corresponding to different light emitting units LU. In some embodiments (not shown), the light emitting layer  132  may include a single layer or a multi-layer. In some embodiments (not shown), the light emitting layer  132  may include the multi-layer, and part of the multi-layer may be continuously layer corresponding to different the light emitting units LU, and part of the multi-layer may be separated. In some embodiments (not shown), the light emitting layer  132  may include the multi-layer, and the layers of the multi-layer may be continuously layers corresponding to different the light emitting units LU. In some embodiments (not shown), the light emitting layer  132  may include the multi-layer, and the layers of the multi-layer may be separated. Furthermore, in  FIG. 8 , an overcoat layer  210  is disposed between the light emitting units LU and the transparent conductive layer  310 , but not limited thereto. 
     Referring to  FIG. 9  is a schematic diagram showing a cross-sectional view of a display device according to a third embodiment of the present disclosure. As shown in  FIG. 9 , the difference between the second embodiment and third embodiment is that the transparent conductive layer  310  of the display device  300  is disposed between the opposite substrate  160  and the light shielding layer  180 , and the second electrode layer  134  may be electrically connected with the auxiliary electrode AE through at least one conductive via V 1  disposed in the light shielding layer  180 . It should be noted that the conductive via V 1  may be a via filled conductive materials. The transparent conductive layer  310  may be served as a touch layer. For example, the transparent conductive layer  310  may be served as one of a receiving electrode layer and transferring electrode layer, a transparent conductive layer  320  may disposed on the transparent conductive layer  310 , and the transparent conductive layer  320  may be served as another one of the receiving electrode layer and the transferring electrode layer, and at least one insulating layer  330  is disposed between the transparent conductive layer  310  and the transparent conductive layer  320 , but not limited thereto. In some embodiments, the top view pattern of the transparent conductive layer  310  and the transparent conductive layer  320  may include metal mesh pattern, but not limited thereto. In some embodiments, the conductive via V 1  include metal materials, which can be used for reducing the interference of the lights emitting from different light emitting units LU, or increase the conversion efficiency of light. 
     Referring to  FIG. 10 ,  FIG. 10  is a schematic diagram showing a cross-sectional view of a display device according to a fourth embodiment. As shown in  FIG. 10 , the difference between the second embodiment and fourth embodiment is that one pixel defining structure PDS of the display device  400  is corresponding to a plurality of auxiliary electrodes AE; in  FIG. 10 , part of pixel defining structure PDS maybe overlapped with at least one auxiliary electrodes AE (such as four auxiliary electrodes AE) in the top view direction Z of the display device, but not limited thereto. In some embodiments, the cross-sectional profile of the auxiliary electrode AE may include the circle. In some embodiments, the auxiliary electrode AE may be in a spherical shape, and the auxiliary electrode AE may be a conductive elastomer, such as an elastomer body coated with conductive material, but not limited thereto. Since the auxiliary electrode AE is the conductive elastomer, the distance between the array substrate structure and the opposite substrate structure may be adjusted when assembling. On the other hands, the auxiliary electrode AE may be formed after the light conversion layers  170 . For example, after forming the second electrode layer  134  of the array substrate structure and forming the light conversion layers  170  (or the transparent conductive layer  310 ) of the opposite substrate structure, the auxiliary electrode AE served as the spacer may be formed between the array substrate structure and the opposite substrate structure in assembling process, but not limited thereto. The second electrode layer  134  may be electrically connected with the transparent conductive layer  310  through the auxiliary electrode AE, and the signal (e.g. the common voltage) may pass through the peripheral wire PW, the peripheral pad PB, the transparent conductive layer  310 , the auxiliary electrode AE to the second electrode layer  134  in sequence, but not limited thereto. 
     Referring to  FIG. 11 ,  FIG. 11  is a schematic diagram showing a cross-sectional view of a display device according to a fifth embodiment. As shown in  FIG. 11 , the difference between the second embodiment and fifth embodiment is that the auxiliary electrode AE of the display device  500  may include a first auxiliary part AE 1  and a second auxiliary part AE 2 , and the second electrode layer  134  is disposed between the first auxiliary part AE 1  and the second auxiliary part AE 2 . In some embodiments, the cross-sectional profiles of the first auxiliary part AE 1  and the second auxiliary part AE 2  may be the same or different. For instance, in  FIG. 11 , the cross-sectional profile of the first auxiliary part AE 1  disposed on the second electrode layer  134  may be the circle, or spherical shape. The cross-sectional profile of the second auxiliary part AE 2  disposed below the second electrode layer  134  may be the trapezoid, but not limited thereto. In addition, the first auxiliary part AE 1  may be a conductive elastomer, but not limited thereto. 
     Referring to  FIG. 12 ,  FIG. 12  is a schematic diagram showing a cross-sectional view of a display device according to a sixth embodiment. As shown in  FIG. 12 , the difference between the first embodiment and sixth embodiment is that the display device  600  further includes a conductive via  620  and a common electrode  610  electrically connected with the auxiliary electrode AE. In this embodiment ( FIG. 12 ), the common electrode  610  is disposed between the pixel defining layer PDL and the substrate  110 , and the conductive via  620  passes through the pixel defining layer PDL and is electrically connected with the auxiliary electrode AE and the common electrode  610 , but not limited thereto. The material of the common electrode  610  may be any suitable conductive material, and the position of the common electrode  610  may be designed based on requirements. For example, in  FIG. 12 , the common electrode  610  and the first electrode  130  are formed of the same layer. In some embodiments, the material of the common electrode  610  maybe the same as the material of the auxiliary electrode AE. In some embodiments, the common electrode  610  may be formed of at least one of the conductive layer of the circuit layer structure CL, such as the first conductive layer  120  or the second conductive layer  126 . In some embodiments, the common electrode  610  may be formed of the other conductive layer, which is different from the circuit layer structure CL. In some embodiments, the common electrode  610  maybe multi-layer. Note that, the common electrode  610  may be overlapped with the light shielding layer  180  in the top view direction Z, and the common electrode  610  may be shielded by the light shielding layer  180 . In some embodiments, the common electrode  610  maybe served as a portion of the capacitor. In some embodiments, two common electrodes  610  may have different widths, different thicknesses, different lengths and/or different surrounding areas, and/or two common electrodes  610  may be formed of different layers or materials. 
     In some embodiments, the material of the conductive via  620  may include metal, and the conductive via  620  may be served as a partition wall to mitigate the influence between the light of different sub-pixels. In another embodiment (not shown), the conductive via  620  may have a plurality of parts electrically connected to each other, and these parts maybe formed as stairs type, but not limited thereto. Regarding the forming process of the conductive via  620 , a through hole is formed by any suitable process, such as photolithography or laser etching, and the conductive material can be formed in the through hole by a deposition process to form the conductive via  620 , but not limited thereto. In some embodiments, the signal (e.g. the common voltage) may pass through the peripheral wire PW, the peripheral pad PB, the auxiliary electrode AE and the conductive via  620  to the common electrode  610  in sequence, but not limited thereto. In some embodiments (not shown), the signal may pass through the peripheral wire PW, the common electrode  610  and the conductive via  620  to the auxiliary electrode AE in sequence, but not limited thereto. In some embodiments (shown in  FIG. 12 ), the side surface of the auxiliary electrode AE is in contact with the light emitting layer  132 , but not limited thereto. Furthermore, in  FIG. 12 , an overcoat layer  210  is disposed between the first flattening layer  150  and the second flattening layer  190 , but not limited thereto. 
     Referring to  FIG. 13 ,  FIG. 13  is a schematic diagram showing a cross-sectional view of a display device according to a seventh embodiment. As shown in  FIG. 13 , the difference between the first embodiment and seventh embodiment is that the auxiliary electrode AE of the display device  700  is disposed between the pixel defining layer PDL and the substrate  110 . In some embodiment (FIG. 13 ), the auxiliary electrode AE of the display device  700  is disposed below the pixel defining layer PDL. In some embodiment (FIG. 13 ), the display device  700  further includes a conductive via  620  disposed to be electrically connected with the auxiliary electrode AE and the second electrode layer  134 . In some embodiment (FIG. 13 ), the auxiliary electrode AE and the first electrode  130  are formed of the same layer, and the conductive via  620  passes through the pixel defining layer PDL and the light emitting layer  132 , but not limited thereto. In some embodiments (not shown), the auxiliary electrode AE is disposed between the circuit layer structure CL and the pixel defining layer PDL, and the material of the auxiliary electrode AE may be different from the first electrode  130 . The detail of the conductive via  620  is described in the sixth embodiment, and will not be redundantly described. 
     Referring to  FIG. 13 , the light conversion layers  170 _ 1  are included in the array substrate structure, and the light conversion layers  170 _ 2  are included in the opposite substrate structure, wherein the light conversion layers  170 _ 1  include the first light conversion layer  170   a _ 1  and the second light conversion layer  170   b _ 1 , and light conversion layers  170 _ 2  include the first light conversion layer  170   a _ 2  and the second light conversion layer  170   b _ 2 . For example, the light conversion layer  170 _ 1  includes quantum dots (or phosphors), and the light conversion layer  170 _ 2  includes color filter, the light conversion layer  170 _ 2  is similar to the second conversion part  174  of the light conversion layer  170  of the first embodiment. In this embodiment, the light conversion layer  170 _ 1  are disposed between two pixel defining structures PDS in the top view direction Z. In this embodiment, the light conversion layer  170 _ 1  is disposed between the protecting layer  140  and the first flattening layer  150 , but not limited thereto. In some embodiments, the protecting layer  140  may include at least one inorganic insulating layer and/or at least one organic insulating layer, and the first flattening layer  150  may include at least one inorganic insulating layer and/or at least one organic insulating layer to protect the light conversion layers  170 _ 1 . In some embodiment, the number of the layers included in the first flattening layer  150  may be less than the number of the layers included in the protecting layer  140 , but not limited thereto. In some embodiment, the thickness of the first flattening layer  150  may be greater than thickness of the protecting layer  140 , but not limited thereto. 
     In some embodiments, the display device  700  may include the light conversion layers  170 _ 1  in the array substrate structure, but not include the light conversion layers  170 _ 2  in the opposite substrate structure. In other embodiments (not shown), the auxiliary electrode AE may be formed after forming the light conversion layers  170 _ 1 . 
     Referring to  FIG. 14 ,  FIG. 14  is a schematic diagram showing a cross-sectional view of a display device according to an eighth embodiment. As shown in  FIG. 14 , the difference between the seventh embodiment and eighth embodiment is that the auxiliary electrode AE of the display device  800  is included in the circuit layer structure CL. In  FIG. 14 , the auxiliary electrode AE is formed of the second conductive layer  126  of the circuit layer structure CL, but not limited thereto. In another embodiment (not shown), the auxiliary electrode AE is formed of the first conductive layer  120 . 
     Referring to  FIG. 15 ,  FIG. 15  is a schematic diagram showing a cross-sectional view of a display device according to a ninth embodiment. As shown in  FIG. 15 , the difference between the first embodiment and ninth embodiment is that the auxiliary electrode AE of the display device  900  is disposed on the second electrode layer  134 . In this embodiment, the auxiliary electrode AE is disposed on the protecting layer  140  and/or the first flattening layer  150 , and a conductive via  620  passes through the protecting layer  140  and/or the first flattening layer  150 , and the conductive via  620  may be electrically connected with the auxiliary electrode AE and the second electrode layer  134 . Note that, the detail of the conductive via  620  is described in the sixth embodiment, and will not be redundantly described. In some embodiment, the auxiliary electrode AE is in contact with the light shielding layer  180  and/or the conductive via  620 , and the conductive via  620  is in contact with the second electrode layer  134 , but not limited thereto. In this embodiment, the auxiliary electrode AE is formed on the opposite substrate  160 , but not limited thereto. 
     In some embodiments, the auxiliary electrode AE is formed on the substrate  110  and disposed on the conductive via  620  (that is, the auxiliary electrode AE belongs the array substrate structure). In  FIG. 15 , the auxiliary electrode AE may be served as a spacer. In some embodiments, the overcoat layer  210  is formed or disposed between the array substrate structure and the opposite substrate structure, and the auxiliary electrode AE is in contact with the overcoat layer  210 , but not limited thereto. In some embodiments, an air gap may exist between the array substrate structure and the opposite substrate structure, but not limited thereto. In some embodiments (not shown), the light shielding structures BM may be replace by the auxiliary electrode AE, and the auxiliary electrode AE may include any suitable conductive materials, such as poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT/PSS), but not limited thereto, and the conductive via  620  may be electrically connected between the auxiliary electrode AE and the second electrode layer  134 . 
     In some embodiment (not shown), the auxiliary electrode AE of the display device is embedded in the pixel defining layer PDL. More specifically, the pixel defining layer PDL may have at least one recess, and the auxiliary electrode AE may be disposed in the recess. In some embodiment (not shown), the top surface of the auxiliary electrode AE and the top surface of the pixel defining layer PDL are formed as a planar surface. In some embodiment (not shown), the top surface of the auxiliary electrode AE and the top surface of the pixel defining layer PDL are aligned. In some embodiment (not shown), the top surface of the auxiliary electrode AE and the top surface of the pixel defining layer PDL are not aligned. In some embodiment (not shown), the auxiliary electrode AE may be disposed in the recess of the pixel defining layer PDL, and the auxiliary electrode AE may cover part of the top surface of the pixel defining layer PDL. 
     In some embodiment (not shown), the light conversion layers  170  are not included in the display device, the different light emitting units LU (such as the first light emitting unit LU 1 , the second light emitting unit LU 2  and the third light emitting unit LU 3 ) may emit different color light (such as red light, green light and/or blue light, but not limited thereto). In some embodiments, the light conversion layers maybe disposed on the substrate  110  or the opposite substrate  160 . 
     In the present disclosure, the above embodiments are exemplarily described, but the present disclosure does not limited by these embodiments. The features described in the above embodiments may be selected and combined to be another embodiment. 
     Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the disclosure. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.