Display panel

Abstract

The present application provides a display panel including a first substrate, a pixel structure and an insulating layer. The pixel structure is disposed on the first substrate and has a reflection region and a penetration region. The pixel structure includes an active element, a first transparent electrode, a reflection layer and a second transparent electrode. The first transparent electrode and the second transparent electrode overlap the penetration region. The second transparent electrode is between the first transparent electrode and the first substrate. The reflection layer is disposed on the active element and defines the reflection region. The insulating layer is disposed between the first transparent electrode and the second transparent electrode. The first transparent electrode or the second transparent electrode is electrically connected to the active element. The first transparent electrode and the second transparent electrode are electrically coupled and form a storage capacitor.

Description

Technical Field

[0001] This invention relates to a display technology, and more particularly to a display panel. Background Technology

[0002] A pixel is the smallest driving unit used by a display panel to display images. To ensure the driving signal of a pixel remains at a certain level within a predetermined time interval, most pixel structures include storage capacitors. To achieve better display quality, the size of pixel structures has been continuously reduced, which has also compressed the available space for the storage capacitors. This is especially true for transflective display panels, where the storage capacitors are typically located in the reflective area. If the proportion of the transmissive area of ​​the pixel structure is to be increased, the proportion of the reflective area must be reduced. Consequently, the storage capacitor in the pixel structure also needs to be reduced, leading to a deterioration in display quality under low-frequency driving. Summary of the Invention

[0003] The present invention relates to a display panel in which the ratio of the transmissive area to the reflective area of ​​the pixel structure can be adjusted more flexibly, while the pixel structure can still have sufficient storage capacitance.

[0004] According to an embodiment of the present invention, a display panel includes a first substrate, a pixel structure, and an insulating layer. The pixel structure is disposed on the first substrate and has a reflective area and a transmissive area. The pixel structure includes an active element, a first transparent electrode, a reflective layer, and a second transparent electrode. The first transparent electrode and the second transparent electrode overlap in the transmissive area. The second transparent electrode is located between the first transparent electrode and the first substrate. The reflective layer is disposed on the active element and defines the reflective area. The insulating layer is disposed between the first transparent electrode and the second transparent electrode. The first transparent electrode or the second transparent electrode is electrically connected to the active element. The first transparent electrode and the second transparent electrode are electrically coupled to form a storage capacitor.

[0005] In the display panel according to an embodiment of the present invention, the first transparent electrode and the second transparent electrode are further disposed in overlapping reflective areas, and the first transparent electrode is electrically connected to an active element.

[0006] In a display panel according to an embodiment of the present invention, the display panel further includes a cladding layer disposed between the first transparent electrode and the first substrate, and covering the active element. A second transparent electrode is disposed between the insulating layer and the cladding layer.

[0007] In a display panel according to an embodiment of the present invention, the pixel structure further includes a common electrode disposed between the cladding layer and the first transparent electrode, and located within the reflective region. A second transparent electrode extends into the reflective region and directly contacts the common electrode.

[0008] In a display panel according to an embodiment of the present invention, the pixel structure further includes a capacitor electrode located in the reflective region and extending from the drain of the active element. A common electrode is electrically coupled to the capacitor electrode to form another storage capacitor.

[0009] In a display panel according to an embodiment of the present invention, the display panel further includes a second substrate, a common electrode layer, and a liquid crystal layer. The second substrate overlaps the first substrate. The common electrode layer is disposed on the second substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The cladding layer has an opening located within a transmissive region. The thickness of the liquid crystal layer in the transmissive region is greater than the thickness of the liquid crystal layer in the re-reflective region.

[0010] In a display panel according to an embodiment of the present invention, a first transparent electrode has a plurality of micro-slits in the penetration area, and a common electrode layer has an electrode opening overlapping the penetration area.

[0011] In the display panel according to an embodiment of the present invention, the reflective layer and the second transparent electrode are the same film layer and are electrically connected to each other.

[0012] In a display panel according to an embodiment of the present invention, the thickness of the second transparent electrode is less than the thickness of the reflective layer.

[0013] In the display panel according to an embodiment of the present invention, the material of the second transparent electrode and the reflective layer includes silver.

[0014] In a display panel according to an embodiment of the present invention, a first transparent electrode is electrically coupled to a reflective layer to form another storage capacitor.

[0015] In a display panel according to an embodiment of the present invention, the display panel further includes a cladding layer disposed between a first transparent electrode and a first substrate, and covering the active elements. The cladding layer has an opening located in a transparent region. A second transparent electrode is disposed between the cladding layer and the first substrate.

[0016] In a display panel according to an embodiment of the present invention, the display panel further includes a second substrate, a common electrode layer, and a liquid crystal layer. The second substrate overlaps the first substrate. The common electrode layer is disposed on the second substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The thickness of the liquid crystal layer in the transmissive region is greater than the thickness of the liquid crystal layer in the reflective region.

[0017] In a display panel according to an embodiment of the present invention, a first transparent electrode has a plurality of micro-slits in the penetration area, and a common electrode layer has an electrode opening overlapping the penetration area.

[0018] In a display panel according to an embodiment of the present invention, the pixel structure further includes a capacitor electrode and a common electrode. The capacitor electrode is located in the reflective region and extends from the drain of the active element. The common electrode is disposed between the capacitor electrode and the first substrate and is located in the reflective region. The common electrode overlaps the capacitor electrode.

[0019] In a display panel according to an embodiment of the present invention, a first transparent electrode extends into the reflective area and is electrically connected to a capacitor electrode. A second transparent electrode is electrically connected to a common electrode. The capacitor electrode is electrically coupled to the common electrode to form another storage capacitor.

[0020] In a display panel according to an embodiment of the present invention, the pixel structure further includes a third transparent electrode. The third transparent electrode is disposed in an overlapping reflective area and is electrically connected to a capacitor electrode.

[0021] In the display panel according to an embodiment of the present invention, the first transparent electrode and the third transparent electrode are in the same film layer and are electrically independent of each other.

[0022] In a display panel according to an embodiment of the present invention, a second transparent electrode is electrically connected to a capacitor electrode. The capacitor electrode is electrically coupled to a common electrode to form another storage capacitor.

[0023] In a display panel according to an embodiment of the present invention, a first transparent electrode extends into the reflective area and is electrically connected to the reflective layer.

[0024] Based on the above, in a display panel according to an embodiment of the present invention, a first transparent electrode and a second transparent electrode are provided in the transmissive area of ​​the pixel structure. The first transparent electrode and the second transparent electrode are electrically coupled to each other and form a storage capacitor electrically connected to the active element. Since the storage capacitor can be arranged overlapping the transmissive area, the ratio adjustment of the reflective area and the transmissive area of ​​the pixel structure is no longer limited by the requirements of the storage capacitor, which helps to increase the design flexibility of the pixel structure when it needs to take into account both optical and electrical performance. Attached Figure Description

[0025] Figure 1 This is a front view schematic diagram of a display panel according to a first embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A cross-sectional view of the display panel;

[0027] Figure 3 This is a cross-sectional schematic diagram of a display panel according to a second embodiment of the present invention;

[0028] Figure 4 This is a front view schematic diagram of a display panel according to a third embodiment of the present invention;

[0029] Figure 5 yes Figure 4 A cross-sectional view of the display panel;

[0030] Figure 6 This is a front view schematic diagram of a display panel according to the fourth embodiment of the present invention;

[0031] Figure 7 yes Figure 6 A cross-sectional view of the display panel;

[0032] Figure 8 This is a front view schematic diagram of a display panel according to the fifth embodiment of the present invention;

[0033] Figure 9 yes Figure 8 A cross-sectional view of the display panel;

[0034] Figure 10 This is a front view schematic diagram of a display panel according to the sixth embodiment of the present invention;

[0035] Figure 11 yes Figure 10 A cross-sectional view of the display panel;

[0036] Figure 12 This is a front view schematic diagram of a display panel according to the seventh embodiment of the present invention;

[0037] Figure 13 yes Figure 12 A cross-sectional view of the display panel.

[0038] Explanation of icon numbers

[0039] 10, 10A, 20, 30, 30A, 40, 40A: Display panel;

[0040] 100: First substrate;

[0041] 100s: substrate surface;

[0042] 110: Grid insulation layer;

[0043] 121, 121A, 122, 123: Insulation layer;

[0044] 130, 130A, 130B: Overburden;

[0045] 200: Second substrate;

[0046] 300: Liquid crystal layer;

[0047] C, C1, C2: Storage capacitors;

[0048] CE, CE-A: Common electrode;

[0049] CEop, CPEop, OP, OP”, RLop: Opening;

[0050] CEL: Common electrode layer;

[0051] CELop: Electrode opening;

[0052] CL: Common electrode connection line;

[0053] CPE: Capacitor electrode;

[0054] d1, d2, t1, t2: thickness;

[0055] DE: Drain electrode;

[0056] DL: Data cable;

[0057] GE: Gate;

[0058] PX, PX-A, PX-B, PX-C, PX-D, PX-E: Pixel structure;

[0059] RA: Reflection zone;

[0060] RL, RL-A, RL-B: Reflective layers;

[0061] SC: Semiconductor pattern;

[0062] SE: Source pole;

[0063] SL: Scan line;

[0064] SLT: Micro-slit;

[0065] T: Active component;

[0066] TA: Penetration Zone;

[0067] TE1, TE1-A, TE1-B, TE1-C: First transparent electrode;

[0068] TE2, TE2-A, TE2-B, TE2-C, TE2-D: Second transparent electrodes;

[0069] TE3: Third transparent electrode;

[0070] TH, TH”: Contact hole;

[0071] X, Y, Z: Direction;

[0072] A-A', B-B', C-C', D-D', E-E', F-F': hatching lines. Detailed Implementation

[0073] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0074] Figure 1 This is a front view schematic diagram of a display panel according to a first embodiment of the present invention. Figure 2 yes Figure 1 A cross-sectional view of the display panel. Figure 2 Corresponding to Figure 1 The section line A-A'. For clarity, Figure 1 Omitted Figure 2 The second substrate 200 and the liquid crystal layer 300 are shown.

[0075] Please refer to Figure 1 and Figure 2 The display panel 10 includes a first substrate 100, a second substrate 200, and a liquid crystal layer 300. The liquid crystal layer 300 is disposed between the first substrate 100 and the second substrate 200. That is, the display panel 10 in this embodiment is a liquid crystal display panel, but it is not limited thereto.

[0076] Furthermore, the first substrate 100 may be provided with multiple scan lines SL, multiple data lines DL, and multiple pixel structures PX. The pixel structure PX is electrically connected to one scan line SL and one data line DL. Figure 1 Only one pixel structure PX of the display panel 10 is shown, but it will be understood that the display panel 10 may be composed of multiple pixel structures PX arranged together. For example, multiple pixel structures PX may be arranged in multiple rows and columns along directions X and Y, respectively. Multiple data lines DL may be arranged along direction X and each extend in direction Y, and multiple scan lines SL may be arranged along direction Y and each extend in direction X, wherein direction X is not parallel to direction Y. In this embodiment, direction X may optionally be perpendicular to direction Y, but is not limited thereto.

[0077] The pixel structure PX includes an active element T. The active element T has a source SE, a drain DE, a gate GE, and a semiconductor pattern SC. The method of forming the active element T includes, for example, forming the gate GE, gate insulating layer 110, semiconductor pattern SC, source SE, and drain DE sequentially on a first substrate 100, but is not limited thereto. The source SE and drain DE are electrically connected to two different regions of the semiconductor pattern SC, respectively. The source SE is electrically connected to a corresponding data line DL. The gate GE is electrically connected to a corresponding scan line SL. More specifically, the portion of the scan line SL extending from the pixel structure PX can serve as the gate GE of the active element T, and the portion of the data line DL extending from the pixel structure PX can serve as the source SE of the active element T.

[0078] The semiconductor pattern SC can serve as the channel layer for the active element T. The material of the semiconductor pattern SC may include amorphous silicon semiconductor, monocrystalline silicon semiconductor, polycrystalline silicon semiconductor, or metal oxide semiconductor. In this embodiment, the active element T is, for example, an amorphous silicon thin film transistor (a-Si TFT), but is not limited thereto. In other embodiments, the active element T may also be a polycrystalline silicon thin film transistor (poly-Si TFT) or a metal oxide semiconductor thin film transistor (metal oxide semiconductor TFT).

[0079] In this embodiment, the gate GE is optionally disposed below the semiconductor pattern SC to form a bottom-gate thin-film transistor, but is not limited thereto. In other embodiments, the gate GE may also be disposed above the semiconductor pattern SC to form a top-gate thin-film transistor. For conductivity considerations, the source SE, drain DE, and gate GE of the scan line SL, data line DL, and active element T are generally made of metals (e.g., molybdenum, aluminum, copper, nickel, chromium), alloys, nitrides of metal materials, oxides of metal materials, oxynitrides of metal materials, or other suitable materials, or a stacked layer of metal materials and other conductive materials. The material of the gate insulating layer 110 includes, for example, silicon oxide, silicon nitride, or other suitable dielectric materials.

[0080] First, it should be noted that the pixel structure PX may have a reflective area RA and a transmissive area TA. That is, the display panel 10 in this embodiment can be a transflective display panel or a micro-transflective display panel. In this embodiment, the pixel structure PX also includes a first transparent electrode TE1, a second transparent electrode TE2, and a reflective layer RL. The reflective layer RL is disposed on the active element T and located within the reflective area RA. The first transparent electrode TE1 and the second transparent electrode TE2 are disposed along the Z direction, overlapping the transmissive area TA and the reflective area RA. Unless otherwise specified below, the overlap relationship between the two components is defined by the Z direction, and the overlap direction will not be described again.

[0081] From another perspective, the reflective region RA of the pixel structure PX can be defined by the distribution range of the reflective layer RL, while the portion of the first transparent electrode TE1 that does not overlap with the reflective layer RL, data line DL, and scan line SL can define the penetrating region TA of the pixel structure PX (e.g., Figure 1(As shown). In this embodiment, the reflective layer RL can directly cover and electrically connect to the first transparent electrode TE1. The materials of the first transparent electrode TE1 and the second transparent electrode TE2 include metal oxides, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, or other suitable oxides, or a stacked layer of at least two of the above. The material of the reflective layer RL includes, for example, silver, silver alloy, or other materials with high reflectivity.

[0082] A first transparent electrode TE1 is disposed between the liquid crystal layer 300 and the first substrate 100. A second transparent electrode TE2 is disposed between the first transparent electrode TE1 and the first substrate 100. In this embodiment, the first transparent electrode TE1 can be electrically connected to the drain DE of the active element T. That is, the first transparent electrode TE1 can serve as the pixel electrode of the pixel structure PX. Notably, in this embodiment, the first transparent electrode TE1 and the second transparent electrode TE2 can be electrically coupled to form the storage capacitor C of the pixel structure PX.

[0083] Since the storage capacitor C in this embodiment can be overlapped with the reflective area RA and the penetrating area TA in addition to the reflective area RA, the ratio adjustment of the reflective area RA and the penetrating area TA of the pixel structure PX is no longer limited by the requirements of the storage capacitor C, which helps to increase the design flexibility of the pixel structure PX when it needs to take into account both optical and electrical performance.

[0084] For example, in this embodiment, an insulating layer 121, an insulating layer 122, and a coating layer 130 may be provided between the first transparent electrode TE1 and the first substrate 100. The insulating layer 121 and the coating layer 130 cover the active element T, and the insulating layer 121 is located between the coating layer 130 and the active element T. The coating layer 130 has an opening OP that overlaps with the reflective region RA. In this embodiment, a second transparent electrode TE2 may be disposed on the coating layer 130, and the insulating layer 122 is disposed between the first transparent electrode TE1 and the second transparent electrode TE2. That is, the second transparent electrode TE2 is located between the insulating layer 122 and the coating layer 130. For example, the first transparent electrode TE1 may be disposed between the reflective layer RL and the insulating layer 122, and is electrically connected to the drain DE of the active element T via the opening OP of the coating layer 130 and the contact hole TH of the insulating layer 121 and the insulating layer 122.

[0085] The coating layer 130 is, for example, an organic insulating layer, the material of which includes, for example, polyesters, polyolefins, polyacrylonitriles, polycarbonates, polyoxyalkylenes, polystyrene, polyethers, polyketides, polyols, polyaldehydes, or other suitable materials, or combinations thereof. Insulating layers 121 and 122 are, for example, inorganic insulating layers, the material of which includes, for example, silicon nitride, silicon oxide, or aluminum oxide, but is not limited thereto.

[0086] Furthermore, the display panel 10 may also include a common electrode layer (CEL) disposed on the surface of the second substrate 200 facing the liquid crystal layer 300, that is, the common electrode layer CEL is located between the second substrate 200 and the liquid crystal layer 300. In this embodiment, the common electrode layer CEL may receive a common voltage, but is not limited thereto. The common electrode layer CEL may be, for example, a light-transmitting electrode, and the material of the light-transmitting electrode may include, for example, metal oxides (e.g., indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, or other suitable oxides, or a stacked layer of at least two of the above), but is not limited thereto. For example, the electric field formed between the first transparent electrode TE1 (i.e., the pixel electrode) and the common electrode layer CEL can control the orientation of the liquid crystal molecules in the liquid crystal layer 300 to display the corresponding image.

[0087] The following examples illustrate this disclosure in detail, wherein the same components will be labeled with the same symbols, and descriptions of the same technical content will be omitted. For the omitted parts, please refer to the foregoing examples, which will not be repeated below.

[0088] Figure 3 This is a cross-sectional schematic diagram of a display panel according to a second embodiment of the present invention. Please refer to... Figure 3 The display panel 10A in this embodiment and Figure 2 The difference between the display panel 10 and the other one lies in the configuration of the reflective layer. Specifically, in the display panel 10A of this embodiment, the reflective layer RL-A of the pixel structure PX-A and the second transparent electrode TE2-A can be the same film layer and are electrically connected to each other.

[0089] For example, in this embodiment, the reflective layer RL-A can be disposed between the cladding layer 130 and the insulating layer 122, and the materials of the reflective layer RL-A and the second transparent electrode TE2-A include, for example, silver, silver alloy, or other conductive materials with high reflectivity. It should be noted that the reflective layer RL-A and the second transparent electrode TE2-A have thicknesses t1 and t2 respectively along the normal direction (e.g., direction Z) of the substrate surface 100s of the first substrate 100, and the thickness t2 of the second transparent electrode TE2-A is less than the thickness t1 of the reflective layer RL-A. Because the second transparent electrode TE2-A is sufficiently thin, it still has a certain transmittance for visible light.

[0090] In this embodiment, in addition to being electrically coupled to the second transparent electrode TE2-A within the transmissive region TA to form a storage capacitor C1, the first transparent electrode TE1 can also be electrically coupled to the reflective layer RL-A within the reflective region RA to form another storage capacitor C2. That is, in this embodiment, the storage capacitor of the pixel structure PX-A is formed by the parallel connection of the storage capacitor C1 in the transmissive region TA and the storage capacitor C2 in the reflective region RA.

[0091] Since the storage capacitor in this embodiment can be set in addition to the overlapping reflection area RA, it can also be set in the overlapping transmission area TA. The ratio adjustment of the reflection area RA and transmission area TA of the pixel structure PX-A is no longer limited by the storage capacitor requirement, which helps to increase the design flexibility of the pixel structure PX-A when it needs to take into account both optical and electrical performance.

[0092] From another perspective, Figure 2 The portion of the second transparent electrode TE2 located in the reflective region RA can be replaced by the reflective layer RL-A of this embodiment. Therefore, in this embodiment, it is not necessary to further configure such a reflective layer on the first transparent electrode TE1. Figure 2 The reflective layer RL. That is to say, compared to Figure 2 The display panel 10A of this embodiment may have a more simplified manufacturing process.

[0093] Figure 4 This is a front view schematic diagram of a display panel according to a third embodiment of the present invention. Figure 5 yes Figure 4 A cross-sectional view of the display panel. Figure 5 Corresponding to Figure 4 The section line B-B'. For clarity, Figure 4 Omitted Figure 5 The second substrate 200 and the liquid crystal layer 300 are shown.

[0094] Please refer to Figure 4 and Figure 5 The display panel 20 in this embodiment and Figure 1 and Figure 2 The main difference between the display panel 10 and the previous one lies in the composition of the pixel structure. Specifically, in the display panel 20 of this embodiment, the pixel structure PX-B may further include a common electrode CE, a capacitor electrode CPE, and an insulating layer 123. The common electrode CE is disposed between the cladding layer 130 and the first transparent electrode TE1, and is located within the reflective region RA. The capacitor electrode CPE is located in the reflective region RA and extends from the drain electrode DE of the active element T. The insulating layer 123 is disposed between the common electrode CE and the first transparent electrode TE1.

[0095] In this embodiment, the second transparent electrode TE2-B and the common electrode CE are disposed between insulating layers 122 and 123, and the second transparent electrode TE2-B directly contacts the common electrode CE within the reflective region RA. For example, in this embodiment, the common electrode CE may be disposed between the second transparent electrode TE2-B and the insulating layer 122, but this is not a limitation. In other embodiments, the second transparent electrode TE2-B may be disposed between the common electrode CE and the insulating layer 122. The common electrode CE may receive a common voltage, but this is not a limitation.

[0096] It is worth noting that in this embodiment, in addition to the first transparent electrode TE1 and the second transparent electrode TE2-B being electrically coupled to form a storage capacitor C1 within the reflective region RA and the transmissive region TA, the common electrode CE and the capacitor electrode CPE can also be electrically coupled to form another storage capacitor C2 within the reflective region RA. More specifically, the storage capacitor of the pixel structure PX-B in this embodiment is formed by the parallel connection of storage capacitors C1 and C2. From another perspective, when the transmissive region TA of the pixel structure PX-B increases, the insufficient storage capacity caused by the reduction in the reflective region RA can be compensated not only by the setting of the common electrode CE and the capacitor electrode CPE, but also by the storage capacitor formed by the first transparent electrode TE1 and the second transparent electrode TE2-B in the transmissive region TA, which can further improve the overall storage capacity of the pixel structure PX-B. Therefore, the ratio adjustment of the reflective region RA and the transmissive region TA of the pixel structure PX-B is no longer limited by the storage capacitor requirement, which helps to increase the design flexibility of the pixel structure PX-B when it needs to balance optical and electrical performance.

[0097] On the other hand, in this embodiment, the capacitor electrode CPE, the common electrode CE, and the reflective layer RL-B each have an opening CPEop, an opening CEop, and an opening RLop located within the penetration region TA, respectively. The insulating layers 121, 122, and 123 have contact holes TH” overlapping the opening OP of the cladding layer 130, and the first transparent electrode TE1 and the reflective layer RL-B can be electrically connected to the capacitor electrode CPE via the opening OP of the cladding layer 130 and the contact holes TH” of the insulating layers 121, 122, and 123.

[0098] For conductivity considerations, the common electrode CE and the capacitor electrode CPE are generally made of metals (such as molybdenum, aluminum, copper, nickel, chromium), alloys, nitrides of metal materials, oxides of metal materials, oxynitrides of metal materials, or other suitable materials, or stacked layers of metal materials and other conductive materials. The insulating layer 123 is, for example, an inorganic insulating layer, and its materials include, but are not limited to, silicon nitride, silicon oxide, or aluminum oxide.

[0099] Figure 6 This is a front view schematic diagram of a display panel according to the fourth embodiment of the present invention. Figure 7 yes Figure 6 A cross-sectional view of the display panel. Figure 7 Corresponding to Figure 6 The section line C-C'. For clarity, Figure 6 Omitted Figure 7 The second substrate 200 and the liquid crystal layer 300 are shown.

[0100] Please refer to Figure 6 and Figure 7 The display panel 30 in this embodiment and Figure 1 and Figure 2 The main difference in the display panel 10 is that the configuration of the second transparent electrode and the cladding layer is different. Specifically, in the display panel 30 of this embodiment, the second transparent electrode TE2-C of the pixel structure PX-C is disposed between the cladding layer 130A and the first substrate 100, and is located approximately within the transmissive region TA.

[0101] In this embodiment, the pixel structure PX-C may further include a capacitor electrode CPE and a common electrode CE-A disposed within the reflective region RA. The capacitor electrode CPE may extend from the drain DE of the active element T. The common electrode CE of two adjacent pixel structures PX arranged along the X direction may be electrically connected to each other via a common electrode connection line CL, but is not limited thereto. Unlike Figure 5 In the display panel 20 of this embodiment, the common electrode CE-A and the gate GE of the active element T can be formed on the same metal layer. That is, the common electrode CE-A is disposed between the capacitor electrode CPE and the first substrate 100.

[0102] It is particularly noteworthy that the second transparent electrode TE2-C can extend into the reflective region RA and directly contact the common electrode CE-A. For example, in this embodiment, the process sequence of the second transparent electrode TE2-C can precede that of the common electrode CE-A. That is, the common electrode CE-A can cover the second transparent electrode TE2-C. However, the present invention is not limited thereto. In another modified embodiment, the process sequence of the second transparent electrode TE2-C can follow that of the common electrode CE-A, i.e., the second transparent electrode TE2-C can cover the common electrode CE-A.

[0103] On the other hand, in this embodiment, in addition to having an opening OP for realizing the electrical connection between the first transparent electrode TE1-A and the capacitor electrode CPE, the coating layer 130A may also have an opening OP” located in the penetration region TA. The first transparent electrode TE1-A can directly cover the portion of the gate insulating layer 110 exposed by the opening OP” through the opening OP” of the coating layer 130A and the contact hole TH” between the insulating layer 121 and the insulating layer 122. That is, only the gate insulating layer 110 is provided between the first transparent electrode TE1-A and the second transparent electrode TE2-C.

[0104] Similar to Figure 5 The display panel 20 has a first transparent electrode TE1-A and a second transparent electrode TE2-C located in the transmissive region TA, which can be electrically coupled to form a storage capacitor C1, while the common electrode CE-A located in the reflective region RA and the capacitor electrode CPE can be electrically coupled to form another storage capacitor C2.

[0105] More specifically, in this embodiment, the storage capacitor of the pixel structure PX-C is formed by storage capacitor C1 and storage capacitor C2 connected in parallel. From another perspective, when the transmittance region (TA) of the pixel structure PX-C increases, the insufficient storage capacity caused by the reduction in the reflectance region (RA) can be compensated not only by the common electrode CE-A and the capacitor electrode CPE, but also by the storage capacitor formed by the first transparent electrode TE1-A and the second transparent electrode TE2-C in the transmittance region TA, further enhancing the overall storage capacity of the pixel structure PX-C. Therefore, the ratio adjustment of the reflectance region RA to the transmittance region TA of the pixel structure PX-C is no longer limited by the storage capacitor requirement, helping to increase the design flexibility of the pixel structure PX-C when balancing optical and electrical performance.

[0106] Furthermore, since the cladding layer 130A in this embodiment has an opening OP in the transmissive region TA, the thickness d2 of the liquid crystal layer 300 in the transmissive region TA can be greater than the thickness d1 of the liquid crystal layer 300 in the reflective region RA. The thicknesses d1 and d2 of the liquid crystal layer 300 are defined, for example, along the normal direction (e.g., direction Z) of the substrate surface 100s. Therefore, the display panel 30 can achieve optimal display performance simultaneously in both the reflective region RA and the transmissive region TA.

[0107] On the other hand, in this embodiment, the first transparent electrode TE1-A may have multiple micro-slits SLT within the transmissive region TA, and the common electrode layer CEL-A has an electrode opening CELop overlapping the transmissive region TA. More specifically, unlike the portion of the liquid crystal layer 300 within the reflective region RA which is driven by the vertical electric field formed between the common electrode layer CEL-A and the first transparent electrode TE1-A, the portion of the liquid crystal layer 300 within the transmissive region TA is driven by the horizontal electric field formed between the portion of the first transparent electrode TE1-A with micro-slits SLT and the second transparent electrode TE2-C. Since the liquid crystal layer 300 is driven by a horizontal electric field in the transmissive region TA, the viewing angle range of the display panel 30 can be further improved.

[0108] For example, in this embodiment, the common electrode CE-A and the second transparent electrode TE2-C can receive a common voltage, but are not limited thereto. That is to say, the pixel structure PX-C in this embodiment adopts a bottom-com architecture in the driving mode of the transmittance region TA.

[0109] Figure 8 This is a front view schematic diagram of a display panel according to the fifth embodiment of the present invention. Figure 9 yes Figure 8 A cross-sectional view of the display panel. Figure 9 Corresponding to Figure 8 The cross section D-D'. For clarity, Figure 8Omitted Figure 9 The second substrate 200 and the liquid crystal layer 300 are shown.

[0110] Please refer to Figure 8 and Figure 9 The display panel 30A in this embodiment and Figure 6 and Figure 7 The main difference in the display panel 30 lies in the different configurations of the first transparent electrode and the second transparent electrode. In the display panel 30A of this embodiment, the first transparent electrode TE1-B of the pixel structure PX-D is located only within the transmittance region TA and is disposed on the insulating layer 121A. The second transparent electrode TE2-D is disposed between the gate insulating layer 110 and the insulating layer 121A and is electrically connected to the capacitor electrode CPE. Only the insulating layer 121A is provided between the first transparent electrode TE1-B and the second transparent electrode TE2-D.

[0111] For example, in this embodiment, the process sequence of the second transparent electrode TE2-D can be before the capacitor electrode CPE. That is, the capacitor electrode CPE can cover the second transparent electrode TE2-D. However, the present invention is not limited thereto. In another modified embodiment, the process sequence of the second transparent electrode TE2-D can be after the capacitor electrode CPE, that is, the second transparent electrode TE2-D can cover the capacitor electrode CPE.

[0112] It is particularly noteworthy that, in this embodiment, the pixel structure PX-D may further include a third transparent electrode TE3, with an overlapping reflective region RA. The third transparent electrode TE3 is disposed between the coating layer 130A and the reflective layer RL, and is electrically connected to the capacitor electrode CPE via the opening OP of the coating layer 130A and the contact hole TH of the insulating layer 121A and the insulating layer 122. In this embodiment, the third transparent electrode TE3 and the first transparent electrode TE1-B may be the same film layer and are electrically independent of each other. That is, in this embodiment, the first transparent electrode TE1-B is not electrically connected to the capacitor electrode CPE and the drain DE of the active element T. For example, in this embodiment, the first transparent electrode TE1-B and the common electrode CE-A may receive a common voltage, but this is not a limitation. Therefore, the pixel structure PX-D in this embodiment adopts a top-com architecture in the driving mode of the transmittance region TA.

[0113] Similar to Figure 7In the display panel 30, the first transparent electrode TE1-B and the second transparent electrode TE2-D located in the transmissive region TA can be electrically coupled to form a storage capacitor C1, while the common electrode CE-A and the capacitor electrode CPE located in the reflective region RA can be electrically coupled to form another storage capacitor C2. More specifically, the storage capacitor of the pixel structure PX-D in this embodiment is formed by the parallel connection of storage capacitors C1 and C2. From another perspective, when the transmissive region TA of the pixel structure PX-D increases, the insufficient storage capacity caused by the reduction of the reflective region RA can be compensated not only by the setting of the common electrode CE-A and the capacitor electrode CPE, but also by the storage capacitor formed by the first transparent electrode TE1-B and the second transparent electrode TE2-D in the transmissive region TA, which can further improve the overall storage capacity of the pixel structure PX-D. Therefore, the ratio adjustment of the reflective region RA and the transmissive region TA of the pixel structure PX-D is no longer limited by the storage capacitor requirement, which helps to increase the design flexibility of the pixel structure PX-D when it needs to take into account both optical and electrical performance.

[0114] Figure 10 This is a front view schematic diagram of a display panel according to the sixth embodiment of the present invention. Figure 11 yes Figure 10 A cross-sectional view of the display panel. Figure 11 Corresponding to Figure 10 The section line E-E'. For clarity, Figure 10 Omitted Figure 11 The second substrate 200 and the liquid crystal layer 300 are shown.

[0115] Please refer to Figure 10 and Figure 11 The display panel 40 in this embodiment and Figure 1 and Figure 2 The difference between the display panel 10 and the previous one lies in the configuration of the coating layer. Specifically, in the display panel 40 of this embodiment, in addition to having an opening OP for realizing the electrical connection between the first transparent electrode TE1 and the drain electrode DE, the coating layer 130B may also have an opening OP located in the penetration region TA. The second transparent electrode TE2 can directly cover the portion of the insulating layer 121 exposed by the opening OP through the opening OP of the coating layer 130A.

[0116] Since the cladding layer 130B of this embodiment has an opening OP in the transmissive region TA, the thickness d2 of the liquid crystal layer 300 in the transmissive region TA can be greater than the thickness d1 of the liquid crystal layer 300 in the reflective region RA. The thicknesses d1 and d2 of the liquid crystal layer 300 are defined, for example, along the normal direction (e.g., direction Z) of the substrate surface 100s. Accordingly, the display panel 40 can achieve optimal display effects in both the reflective region RA and the transmissive region TA.

[0117] On the other hand, since the storage capacitor C in this embodiment can be set in addition to the overlapping reflection area RA, it can also be set in the overlapping transmission area TA. The ratio adjustment of the reflection area RA and the transmission area TA of the pixel structure PX is no longer limited by the requirements of the storage capacitor C, which helps to increase the design flexibility of the pixel structure PX when it needs to take into account both optical and electrical performance.

[0118] Figure 12 This is a front view schematic diagram of a display panel according to the seventh embodiment of the present invention. Figure 13 yes Figure 12 A cross-sectional view of the display panel. Figure 13 Corresponding to Figure 12 The section line F-F'. For clarity, Figure 12 Omitted Figure 13 The second substrate 200 and the liquid crystal layer 300 are shown.

[0119] Please refer to Figure 12 and Figure 13 In this embodiment, the display panel 40A and Figure 10 and Figure 11 The main difference in the display panel 40 lies in the different configuration of the first transparent electrode in the transmissive region TA. For example, in the display panel 40A of this embodiment, the first transparent electrode TE1-C of the pixel structure PX-E may have multiple micro-slits SLT in the transmissive region TA, and the common electrode layer CEL-A has an electrode opening CELop that overlaps with the transmissive region TA.

[0120] More specifically, unlike the portion of the liquid crystal layer 300 within the reflective region RA which is driven by a vertical electric field formed between the common electrode layer CEL-A and the first transparent electrode TE1-A, the portion of the liquid crystal layer 300 within the transmissive region TA is driven by a horizontal electric field formed between the portion of the first transparent electrode TE1-A with micro-slits SLT and the second transparent electrode TE2-C. Because the liquid crystal layer 300 is driven by a horizontal electric field in the transmissive region TA, the viewing angle range of the display panel 40A can be further improved.

[0121] For example, in this embodiment, the second transparent electrode TE2 can receive a common voltage, but is not limited thereto. That is, the pixel structure PX-E in this embodiment adopts a bottom-com architecture in the driving mode of the transmittance region TA.

[0122] On the other hand, since the storage capacitor C in this embodiment can be set in addition to the overlapping reflection area RA, it can also be set in the overlapping transmission area TA. The ratio adjustment of the reflection area RA and the transmission area TA of the pixel structure PX-E is no longer limited by the requirements of the storage capacitor C, which helps to increase the design flexibility of the pixel structure PX-E when it needs to take into account both optical and electrical performance.

[0123] In summary, in a display panel according to an embodiment of the present invention, a first transparent electrode and a second transparent electrode are provided within the transmissive area of ​​the pixel structure. The first transparent electrode and the second transparent electrode are electrically coupled to each other and form a storage capacitor electrically connected to the active element. Since the storage capacitor can be arranged overlapping the transmissive area, the ratio adjustment of the reflective area and the transmissive area of ​​the pixel structure is no longer limited by the requirements of the storage capacitor, which helps to increase the design flexibility of the pixel structure when it needs to take into account both optical and electrical performance.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that, include: First substrate; A pixel structure is disposed on the first substrate and has a reflective area and a transmissive area. The pixel structure includes: Active components; A first transparent electrode is disposed overlapping the penetration region; A reflective layer is disposed on the active element and defines the reflective area; and A second transparent electrode is disposed overlapping the penetration region and located between the first transparent electrode and the first substrate; and An insulating layer is disposed between the first transparent electrode and the second transparent electrode. The first transparent electrode or the second transparent electrode is electrically connected to the active element, and the first transparent electrode and the second transparent electrode are electrically coupled to form a storage capacitor.

2. The display panel according to claim 1, characterized in that, The first transparent electrode and the second transparent electrode are also disposed overlapping the reflective area, and the first transparent electrode is electrically connected to the active element.

3. The display panel according to claim 2, characterized in that, Also includes: A coating layer is disposed between the first transparent electrode and the first substrate, and covers the active element, wherein the second transparent electrode is disposed between the insulating layer and the coating layer.

4. The display panel according to claim 3, characterized in that, The pixel structure also includes: A common electrode is disposed between the coating layer and the first transparent electrode and located within the reflective region. The second transparent electrode extends into the reflective region and directly contacts the common electrode.

5. The display panel according to claim 4, characterized in that, The pixel structure also includes: A capacitor electrode, located in the reflective region and extending from the drain of the active element, wherein the common electrode is electrically coupled to the capacitor electrode to form another storage capacitor.

6. The display panel according to claim 3, characterized in that, Also includes: The second substrate is disposed overlapping the first substrate; A common electrode layer is disposed on the second substrate; as well as A liquid crystal layer is disposed between the first substrate and the second substrate, wherein the coating layer has an opening located in the transmissive region, and the thickness of the liquid crystal layer in the transmissive region is greater than the thickness of the liquid crystal layer in the reflective region.

7. The display panel according to claim 6, characterized in that, The first transparent electrode has multiple micro-slits in the penetration region, and the common electrode layer has electrode openings that overlap the penetration region.

8. The display panel according to claim 1, characterized in that, The reflective layer and the second transparent electrode are the same film layer and are electrically connected to each other.

9. The display panel according to claim 8, characterized in that, The thickness of the second transparent electrode is less than the thickness of the reflective layer.

10. The display panel according to claim 8, characterized in that, The material of the second transparent electrode and the reflective layer includes silver.

11. The display panel according to claim 8, characterized in that, The first transparent electrode is electrically coupled to the reflective layer to form another storage capacitor.

12. The display panel according to claim 1, characterized in that, Also includes: A coating layer is disposed between the first transparent electrode and the first substrate and covers the active element. The coating layer has an opening located in the penetration region, wherein the second transparent electrode is disposed between the coating layer and the first substrate.

13. The display panel according to claim 12, characterized in that, Also includes: The second substrate is disposed overlapping the first substrate; A common electrode layer is disposed on the second substrate; as well as A liquid crystal layer is disposed between the first substrate and the second substrate, wherein the thickness of the liquid crystal layer in the transmissive region is greater than the thickness of the liquid crystal layer in the reflective region.

14. The display panel according to claim 13, characterized in that, The first transparent electrode has multiple micro-slits in the penetration region, and the common electrode layer has electrode openings that overlap the penetration region.

15. The display panel according to claim 12, characterized in that, The pixel structure also includes: A capacitor electrode, located in the reflective region and extending from the drain of the active element; and A common electrode is disposed between the capacitor electrode and the first substrate and located in the reflective region, and the common electrode overlaps the capacitor electrode.

16. The display panel according to claim 15, characterized in that, The first transparent electrode extends into the reflective region and is electrically connected to the capacitor electrode, the second transparent electrode is electrically connected to the common electrode, and the capacitor electrode is electrically coupled to the common electrode to form another storage capacitor.

17. The display panel according to claim 15, characterized in that, The pixel structure also includes: A third transparent electrode is disposed overlapping the reflective area and is electrically connected to the capacitor electrode.

18. The display panel according to claim 17, characterized in that, The first transparent electrode and the third transparent electrode are made of the same film layer and are electrically independent of each other.

19. The display panel according to claim 17, characterized in that, The second transparent electrode is electrically connected to the capacitor electrode, and the capacitor electrode is electrically coupled to the common electrode to form another storage capacitor.

20. The display panel according to claim 1, characterized in that, The first transparent electrode extends into the reflective region and is electrically connected to the reflective layer.

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