Display device and driving method thereof

Abstract

The invention provides a display device and a driving method thereof. The display device comprises an element array substrate, an electrophoretic display substrate and a humidity sensor. The electrophoretic display substrate is disposed on the element array substrate. The humidity sensor includes a conductive pattern disposed on a side of the element array substrate adjacent to the electrophoretic display substrate.

Description

Technical Field

[0001] The invention relates to a display device and a driving method thereof. Background Art

[0002] The display medium layer in the display device is sensitive to environmental parameters such as humidity and / or temperature. Therefore, it is necessary to sense the humidity and / or temperature of the display device and provide a suitable driving waveform according to the environmental parameters such as humidity and / or temperature to improve the optical performance. Summary of the invention

[0003] The invention provides a display device and a driving method thereof, which are helpful to improve optical performance.

[0004] According to an embodiment of the present invention, a display device includes a component array substrate, an electrophoretic display substrate, and a humidity sensor. The electrophoretic display substrate is disposed on the component array substrate. The humidity sensor includes a conductive pattern disposed on a side of the component array substrate adjacent to the electrophoretic display substrate.

[0005] In an embodiment according to the invention, the humidity sensor is a capacitive humidity sensor or a resistive humidity sensor.

[0006] In an embodiment according to the present invention, the conductive pattern surrounds the display area of ​​the display device.

[0007] In an embodiment according to the present invention, the conductive pattern overlaps the electrophoretic display substrate and is located between the electrophoretic display substrate and the device array substrate.

[0008] In an embodiment according to the present invention, there are multiple humidity sensors, and the multiple humidity sensors are disposed at least adjacent to multiple corners of the display device.

[0009] In an embodiment according to the present invention, the device array substrate includes a dielectric layer, the electrophoretic display substrate includes an adhesive layer, and the humidity sensor is disposed between the dielectric layer and the adhesive layer.

[0010] In an embodiment of the present invention, the display device further comprises a driving chip which is disposed in a peripheral region of the display device and is electrically connected to the humidity sensor, the element array substrate and the electrophoretic display substrate.

[0011] In an embodiment according to the present invention, the display device further includes a circuit board, wherein the humidity sensor is electrically connected to the driving chip through the circuit board.

[0012] In an embodiment according to the present invention, the display device further comprises a temperature sensor, which is arranged in the element array substrate and located at a side away from the electrophoretic display substrate.

[0013] In an embodiment according to the present invention, a device array substrate includes a substrate and a gate dielectric layer disposed on the substrate, and a temperature sensor is disposed between the substrate and the gate dielectric layer.

[0014] In an embodiment of the present invention, the display device further comprises a driving chip which is disposed in a peripheral region of the display device and is electrically connected to the humidity sensor, the temperature sensor, the element array substrate and the electrophoretic display substrate.

[0015] According to an embodiment of the present invention, a driving method of a display device includes: providing a display device; confirming a resistance value or a capacitance value of a humidity sensor of the display device; confirming humidity according to the resistance value or the capacitance value of the humidity sensor; and providing a driving waveform according to the humidity.

[0016] In an embodiment according to the present invention, the driving method of the display device further includes: confirming the resistance value of a temperature sensor of the display device; and confirming the temperature according to the resistance value of the temperature sensor; wherein providing the driving waveform is based on the temperature in addition to the humidity.

[0017] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the present invention and together with the description serve to explain the principles of the present invention.

[0019] Figure 1 is a schematic top view of a display device according to a first embodiment of the present invention;

[0020] Figure 2 It corresponds to Figure 1 A schematic cross-sectional view of the middle section line I-I';

[0021] Figure 3 is a schematic top view of a display device according to a second embodiment of the present invention;

[0022] Figure 4 It corresponds to Figure 3 A schematic cross-sectional view of the middle section line II-II';

[0023] Figure 5 is a schematic top view of a display device according to a third embodiment of the present invention;

[0024] Figure 6 is a schematic top view of a display device according to a fourth embodiment of the present invention;

[0025] Figure 7 yes Figure 6A partial enlarged schematic diagram of a display device;

[0026] Figure 8 is a schematic top view of a display device according to a fifth embodiment of the present invention;

[0027] Fig. 9 is a flow chart of a method for driving a display device according to an embodiment of the present invention;

[0028] Fig.10 This is a graph showing the relationship between the resistance and humidity of a resistive humidity sensor;

[0029] Fig.11 It is a graph showing the relationship between capacitance and humidity of a capacitive humidity sensor;

[0030] Fig.12 This is a graph showing the relationship between the resistance value and temperature of a resistive temperature sensor.

[0031] Description of Figure Numbers

[0032] 1. 1A, 1B, 1C, 1D: display device;

[0033] 10: Component array substrate;

[0034] 11: electrophoretic display substrate;

[0035] 12, 12A, 12B, 12C, 12D: humidity sensor;

[0036] 13: Driver chip;

[0037] 14: Circuit board;

[0038] 15. CL1, CL2: conductors;

[0039] 16: Temperature sensor;

[0040] 120, 121, 160: annular conductive pattern;

[0041] 122: conductive pattern;

[0042] 140: pad;

[0043] 900, 902, 904, 906, 908, 910: steps;

[0044] AD: Active Component;

[0045] AH: bonding layer;

[0046] C1, C2, C3, C4: conductive layer;

[0047] CH: semiconductor pattern;

[0048] D1, D2, D3: direction;

[0049] DE: drain;

[0050] GE: gate;

[0051] IF: Interval;

[0052] IN1, IN2, IN3: dielectric layer;

[0053] M: electrophoretic layer;

[0054] M1: electrophoresis fluid;

[0055] M2: white electrophoretic particles;

[0056] M3: black electrophoretic particles;

[0057] PE: pixel electrode;

[0058] R1: display area;

[0059] R2: peripheral area;

[0060] SCL: semiconductor layer;

[0061] SE: source;

[0062] SUB1, SUB2: substrate;

[0063] I-I', II-II': section line. DETAILED DESCRIPTION

[0064] The directional terms mentioned herein, such as "up", "down", "front", "back", "left", "right", etc., are only used with reference to the directions of the accompanying drawings. Therefore, the directional terms used are used for illustration, not for limiting the present invention.

[0065] In the drawings, each figure shows the general characteristics of the methods, structures and / or materials used in a particular embodiment. However, these drawings should not be interpreted as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative size, thickness and position of each film layer, region or structure may be reduced or enlarged.

[0066] In the drawings, the same or similar elements will be denoted by the same or similar reference numerals, and the description will omit their redundant descriptions. In addition, the features in different embodiments can be combined with each other without conflict, and simple equivalent changes and modifications made according to this specification or claims are still within the scope of the present invention.

[0067] In this article, an element / film layer disposed on (or over) another element / film layer may include the case where the element / film layer is directly disposed on (or over) the other element / film layer and the two elements / film layers are in direct contact; and the case where the element / film layer is indirectly disposed on (or over) the other element / film layer and there are one or more elements / film layers between the two elements / film layers.

[0068] Figure 1 is a schematic top view of a display device according to a first embodiment of the present invention. Figure 2 It corresponds to Figure 1 The cross-section diagram of the middle section line I-I'. Please refer to Figure 1 The display device 1 may include a display area R1 and a peripheral area R2 connected to the display area R1. Figure 1 The dotted line in FIG. 1 shows the boundary IF between the display area R1 and the peripheral area R2. Figure 1 As shown, the peripheral region R2 may be located on at least one side of the display region R1. In some embodiments, the peripheral region R2 may surround the display region R1, but is not limited thereto.

[0069] The display area R1 can be used to display images, and the peripheral area R2 can be used to set peripheral circuits or other components. In some embodiments, although not shown, the display device 1 may include an opaque frame to shield the peripheral area R2, wherein the opaque frame may include a light-transmitting opening overlapping the display area R1 in the direction D3, so that the user can see the image provided by the display device 1 from the display area R1.

[0070] Please refer to Figure 1 as well as Figure 2 The display device 1 may include an element array substrate 10, an electrophoretic display substrate 11 and a humidity sensor 12. For easy identification, Figure 1 The edge of the electrophoretic display substrate 11 is indicated by a bold line. Figure 1 As shown, the device array substrate 10 may have a larger area than the electrophoretic display substrate 11 , but the present invention is not limited thereto.

[0071] In some embodiments, Figure 2 As shown, the device array substrate 10 may include a substrate SUB1, a conductive layer C1, a dielectric layer IN1, a semiconductor layer SCL, a conductive layer C2, a dielectric layer IN2, a dielectric layer IN3 and a conductive layer C3, but is not limited thereto. According to different requirements, the device array substrate 10 may increase or decrease one or more film layers.

[0072] The substrate SUB1 may be a hard substrate or a flexible substrate, and the light transmittance of the substrate SUB1 may not be limited, that is, the substrate SUB1 may be a light-transmitting substrate, a semi-transmitting substrate, or an opaque substrate. For example, the material of the substrate SUB1 may include glass, plastic, or other suitable materials. According to different requirements, the substrate SUB1 may also be an insulating film.

[0073] The conductive layer C1 is disposed on the substrate SUB1. The material of the conductive layer C1 may include an opaque conductive material, a translucent conductive material, or a combination thereof. The opaque conductive material may include a metal, an alloy, or a combination thereof. The translucent conductive material may include a metal oxide, a metal nitride, a metal oxynitride, other suitable translucent conductive materials, or a combination thereof. The metal oxide may include, but is not limited to, metal oxides such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, or indium germanium zinc oxide.

[0074] The conductive layer C1 may be a patterned conductive layer and may include a plurality of gate electrodes GE ( Figure 2 One gate line (not shown) and / or other conductive lines (not shown) are schematically shown. The plurality of gates GE and the plurality of gate lines are, for example, located in the display region R1, and each gate GE may be electrically connected to a corresponding gate line.

[0075] The dielectric layer IN1 is disposed on the conductive layer C1 and the substrate SUB1. The dielectric layer IN1 is a gate dielectric layer, and its material is, for example, an inorganic dielectric layer. For example, the material of the dielectric layer IN1 may include silicon oxide, silicon oxynitride, silicon nitride, etc. or a combination thereof.

[0076] The semiconductor layer SCL is disposed on the dielectric layer IN1. The material of the semiconductor layer SCL may include crystalline silicon, amorphous silicon, polycrystalline silicon, oxide semiconductor, organic semiconductor, etc., wherein the oxide semiconductor may include indium gallium zinc oxide (IGZO), zinc oxide (ZnO), tin oxide (SnO), indium zinc oxide (IZO), gallium zinc oxide (GZO), zinc tin oxide (ZTO) or indium tin oxide (ITO), but is not limited thereto.

[0077] The semiconductor layer SCL may be a patterned semiconductor layer and may include a plurality of semiconductor patterns CH ( Figure 2 A schematic diagram is shown. For example, a plurality of semiconductor patterns CH are located in the display region R1, and the plurality of semiconductor patterns CH overlap with the plurality of gate electrodes GE in a direction D3.

[0078] The conductive layer C2 is disposed on the semiconductor layer SCL and the dielectric layer IN1. The material of the conductive layer C2 can refer to the material of the conductive layer C1, and will not be repeated here.

[0079] The conductive layer C2 may be a patterned conductive layer and may include a plurality of source electrodes SE ( Figure 2 Schematically showing one), multiple drain electrodes DE ( Figure 2 Schematically showing one), multiple data lines (not shown) and / or other conductive lines (not shown). Multiple source electrodes SE, multiple drain electrodes DE and multiple data lines are, for example, located in the display region R1, and each source electrode SE can be electrically connected to a corresponding data line. In some embodiments, the element array substrate 10 may also include an active element AD, which is, for example, located in the display region R1 and may include a gate GE, a semiconductor pattern CH, a source electrode SE and a drain electrode DE, but is not limited thereto. Figure 2 The active element AD in the figure is taken as an example of a bottom-gate thin film transistor, but it should be understood that the type of the active element AD can be changed according to actual needs and is not limited thereto.

[0080] In some embodiments, the device array substrate 10 may include a plurality of active devices AD. The plurality of active devices AD may be arranged in an array along directions D1 and D2. Directions D1 and D2 intersect with each other and are both perpendicular to direction D3. In some embodiments, directions D1 and D2 may be perpendicular to each other.

[0081] The dielectric layer IN2 is disposed on the conductive layer C2, the semiconductor layer SCL and the dielectric layer IN1. The dielectric layer IN2 is, for example, an inorganic dielectric layer. For example, the material of the dielectric layer IN2 may include silicon oxide, silicon oxynitride, silicon nitride, etc. or a combination thereof.

[0082] The dielectric layer IN3 is disposed on the dielectric layer IN2. The dielectric layer IN3 is, for example, a planar layer and may include an organic dielectric layer. For example, the material of the dielectric layer IN3 may include polyimide resin, epoxy resin, acrylic resin or other polymer materials.

[0083] The conductive layer C3 is disposed on the dielectric layer IN3. The material of the conductive layer C3 may refer to the material of the conductive layer C1, and will not be repeated here.

[0084] The conductive layer C3 may be a patterned conductive layer and may include a plurality of pixel electrodes PE ( Figure 2 A plurality of pixel electrodes PE are, for example, located in the display region R1, and each pixel electrode PE can extend into a through hole (not shown) penetrating the dielectric layer IN3 and the dielectric layer IN2 to be electrically connected to a corresponding drain electrode DE.

[0085] The electrophoretic display substrate 11 is disposed on the element array substrate 10 and is closer to the light incident side of the display device 1 than the element array substrate 10 (for example, the side of the display device 1 facing the user when the user is viewing an image). Figure 2 As shown, the electrophoretic display substrate 11 may include a substrate SUB2, a conductive layer C4, an electrophoretic layer M, and a bonding layer AH, but is not limited thereto. According to different requirements, the electrophoretic display substrate 11 may increase or decrease one or more film layers.

[0086] The substrate SUB2 may be a hard substrate or a flexible substrate, and the substrate SUB2 is a light-transmitting substrate to reduce shielding or absorption of the light beam. For example, the material of the substrate SUB2 may include glass, plastic or other suitable materials. According to different requirements, the substrate SUB2 may also be an insulating film.

[0087] The conductive layer C4 is disposed on the surface of the substrate SUB2 facing the device array substrate 10. The material of the conductive layer C4 may include a light-transmitting conductive material. In addition, the conductive layer C4 may be a whole conductive layer, such as a common electrode layer, but is not limited thereto.

[0088] The electrophoretic layer M is disposed on the surface of the conductive layer C4 facing the element array substrate 10. For example, the electrophoretic layer M may include an electrophoretic liquid M1, a plurality of white electrophoretic particles M2, and a plurality of black electrophoretic particles M3, but is not limited thereto. The electrophoretic liquid M1 is, for example, transparent. A plurality of white electrophoretic particles M2 and a plurality of black electrophoretic particles M3 are distributed in the electrophoretic liquid M1, and the plurality of white electrophoretic particles M2 and the plurality of black electrophoretic particles M3 may have opposite electrical properties. In this way, the distribution of the plurality of white electrophoretic particles M2 and the plurality of black electrophoretic particles M3 can be controlled by changing the voltage applied to the pixel electrode PE and the common electrode layer (such as the conductive layer C4), or by changing the voltage applied to the pixel electrode PE or the driving waveform when the voltage of the common electrode layer (such as the conductive layer C4) is fixed, thereby controlling the image displayed by the display device 1. Although Figure 2 The electrophoretic layer M is shown to have a microcup structure, each microcup structure has a hexagonal cross-sectional shape, each microcup structure is provided with charged particles of two colors, and the electrophoretic liquid M1 is transparent, but the present disclosure is not limited thereto. In other embodiments, although not shown, the cross-sectional shape of each microcup structure may be circular, elliptical or other polygonal, each microcup structure may be provided with charged particles of one color or multiple colors, and the electrophoretic liquid M1 may be a colored or transparent electrophoretic liquid. Alternatively, the electrophoretic layer M may have a microcapsule structure.

[0089] The bonding layer AH is disposed between the electrophoretic layer M and the conductive layer C4, and the electrophoretic display substrate 11 can be fixed to the device array substrate 10 through the bonding layer AH. The bonding layer AH is, for example, an insulating adhesive layer and can be an insulating organic adhesive layer, but is not limited thereto. For example, the bonding layer AH can be an optically clear adhesive (OCA), an optically clear resin (OCR), or other suitable bonding materials.

[0090] The humidity sensor 12 is disposed on a side of the element array substrate 10 adjacent to the electrophoretic display substrate 11. For example, Figure 1 As shown, a portion of the humidity sensor 12 (such as a portion away from the driving chip 13) may overlap the electrophoretic display substrate 11 in the direction D3, and another portion of the humidity sensor 12 (such as a portion adjacent to the driving chip 13) may not overlap the electrophoretic display substrate 11 in the direction D3. In addition, the portion where the humidity sensor 12 overlaps the electrophoretic display substrate 11 may be located, for example, between the electrophoretic display substrate 11 and the element array substrate 10. Figure 2 For example, the portion where the humidity sensor 12 overlaps with the electrophoretic display substrate 11 may be located between the bonding layer AH of the electrophoretic display substrate 11 and the dielectric layer IN3 of the element array substrate 10 to sense the humidity of the electrophoretic display substrate 11, but the present invention is not limited thereto. In other embodiments, although not shown in Figure 2 The humidity sensor 12 may not overlap the electrophoretic display substrate 11 in the direction D3. For example, the humidity sensor 12 may be disposed on a portion of the element array substrate 10 not covered by the electrophoretic display substrate 11 to sense the humidity around the electrophoretic display substrate 11, but is not limited thereto.

[0091] In some embodiments, the humidity sensor 12 is a conductive pattern layer and can be a capacitive humidity sensor or a resistive humidity sensor, and the manufacturing process of the humidity sensor 12 can be integrated with the manufacturing process of some film layers in the element array substrate 10 to save manufacturing process, time and / or cost. Taking a capacitive humidity sensor as an example, Figure 1 as well as Figure 2 As shown, the humidity sensor 12 includes, for example, a ring-shaped conductive pattern 120 and a ring-shaped conductive pattern 121. Although the humidity sensor 12 of this embodiment is described with the above pattern, the present disclosure is not limited to the above pattern.

[0092] The annular conductive pattern 120 and the annular conductive pattern 121 are, for example, located in the peripheral region R2, wherein the annular conductive pattern 120 surrounds the display region R1, the annular conductive pattern 121 is separated from the annular conductive pattern 120, and the annular conductive pattern 121 surrounds the annular conductive pattern 120. At least a portion of the annular conductive pattern 120 and at least a portion of the annular conductive pattern 121 overlap the electrophoretic display substrate 11 and are located between the electrophoretic display substrate 11 and the element array substrate 10. The gap between the annular conductive pattern 121 and the annular conductive pattern 120 is, for example, filled with an insulating organic adhesive layer (bonding layer AH), whereby the annular conductive pattern 120, the annular conductive pattern 121, and the bonding layer AH located therebetween constitute a capacitor, the annular conductive pattern 120, the electrophoretic layer M on the annular conductive pattern 120, and the bonding layer AH located therebetween constitute a capacitor, and the annular conductive pattern 121, the electrophoretic layer M on the annular conductive pattern 121, and the bonding layer AH located therebetween constitute a capacitor.

[0093] Since the dielectric constant of the organic dielectric layer (such as the bonding layer AH and the dielectric layer IN3) changes with the humidity, for example, the dielectric constant of the organic dielectric layer increases with the increase of humidity, the capacitance value of the humidity sensor 12 also changes with the humidity, for example, the capacitance value of the humidity sensor 12 increases with the increase of humidity. By measuring the capacitance value of the humidity sensor 12, the humidity of the electrophoretic display substrate 11 or the humidity around the electrophoretic display substrate 11 can be determined according to the measured capacitance value, and a driving waveform corresponding to the humidity interval is provided to the pixel electrode PE according to the humidity, so as to improve the optical performance of the display device 1.

[0094] According to different requirements, the display device 1 may further include other components or film layers. Figure 1 As shown, the display device 1 may further include a driving chip 13. The driving chip 13 is, for example, disposed in the peripheral region R2 and electrically connected to the element array substrate 10, the electrophoretic display substrate 11, and the humidity sensor 12. For example, a plurality of gate lines (not shown) and a plurality of data lines (not shown) in the element array substrate 10 and a common electrode layer (such as the conductive layer C4) in the electrophoretic display substrate 11 may be electrically connected to the driving chip 13 through a plurality of conductive wires (not shown), a plurality of conductive through holes (not shown), or a combination thereof, but is not limited thereto.

[0095] In some embodiments, the display device 1 may further include a circuit board 14, wherein the humidity sensor 12 may be electrically connected to the driver chip 13 through the circuit board 14. For example, the display device 1 may further include a plurality of wires 15 connected between the circuit board 14 and the driver chip 13, and the humidity sensor 12 may be electrically connected to the driver chip 13 through the circuit board 14 and the plurality of wires 15. The circuit board 14 may electrically connect the driver chip 13 to an external circuit (not shown, such as a power supply). For example, the circuit board 14 may be a flexible printed circuit board, but is not limited thereto. Although Figure 1 The driving chip 13 is bonded to the device array substrate 10 , but the present disclosure is not limited thereto. In other embodiments, the driving chip 13 may be bonded to the circuit board 14 . The following embodiments may be modified in the same manner and will not be repeated below.

[0096] In some embodiments, the display device 1 may further include a temperature sensor 16. To clearly show the relative arrangement relationship between the humidity sensor 12 and other components, Figure 1 The temperature sensor 16 is omitted in the figure. For the relative arrangement relationship between the temperature sensor 16 and other components or film layers, please refer to Figure 2 .like Figure 2 As shown, the temperature sensor 16 is, for example, disposed in the element array substrate 10 and located on a side away from the electrophoretic display substrate 11. Figure 2 For example, the temperature sensor 16 is disposed between the substrate SUB1 and the dielectric layer IN1 (gate dielectric layer), and the temperature sensor 16 and the plurality of gates GE may be in the same conductive layer, such as the conductive layer C1, but the present invention is not limited thereto. In other embodiments, although not shown, the temperature sensor 16 may also be disposed between the dielectric layer IN1 and the dielectric layer IN2, and the temperature sensor 16 and the plurality of sources SE and the plurality of drains DE may be in the same conductive layer, such as the conductive layer C2.

[0097] In some embodiments, the temperature sensor 16 may be a resistive temperature sensor and may include a ring-shaped conductive pattern 160 surrounding the display region R1. The top view shape of the ring-shaped conductive pattern 160 may refer to Figure 1 The top view of one of the annular conductive pattern 120 and the annular conductive pattern 121. In some embodiments, at least one of the humidity sensor 12 and the temperature sensor 16 may be electrically connected to the driver chip 13 through the circuit board 14, but the present invention is not limited thereto. In other embodiments, although not shown, at least one of the humidity sensor 12 and the temperature sensor 16 may be electrically connected to the driver chip 13 without passing through the circuit board 14.

[0098] In some embodiments, the resistive temperature (humidity) sensor and the capacitive humidity (temperature) sensor can be set to the same metal layer. For example, the temperature sensor 16 can be a resistive temperature sensor, and share the annular conductive pattern 120 or the annular conductive pattern 121 with the capacitive humidity sensor 12. That is, the resistive temperature sensor (temperature sensor 16) and the capacitive humidity sensor 12 are metal wires of the same layer, and the capacitive humidity sensor 12 is the annular conductive pattern 120 and the annular conductive pattern 121, and the resistive temperature sensor (temperature sensor 16) is one of the annular conductive pattern 120 and the annular conductive pattern 121. In this way, there is no need to set the temperature sensor 16 between the substrate SUB1 and the dielectric layer IN1 (gate dielectric layer). In some embodiments, the temperature sensor 16 can be a capacitive temperature sensor, and share the annular conductive pattern 120 or the annular conductive pattern 121 with the resistive humidity sensor 12. That is, the capacitive temperature sensor (temperature sensor 16) and the resistive humidity sensor 12 are metal wires on the same layer, and the capacitive temperature sensor (temperature sensor 16) is an annular conductive pattern 120 and an annular conductive pattern 121, and the resistive humidity sensor 12 is one of the annular conductive pattern 120 and the annular conductive pattern 121. In this way, there is no need to separately set the temperature sensor 16 between the substrate SUB1 and the dielectric layer IN1 (gate dielectric layer).

[0099] By arranging the temperature sensor 16 on the side of the element array substrate 10 away from the electrophoretic display substrate 11, the temperature sensor 16 will be closer to the inorganic dielectric layer and farther away from the organic dielectric layer. In this way, the interference of the organic dielectric layer, which is more easily affected by humidity, on the temperature sensor 16 can be reduced, thereby improving the accuracy of temperature sensing. Figure 2 Taking a resistive temperature sensor as an example, the type of the temperature sensor 16 is not limited thereto. In other embodiments, although not shown, the display device 1 may not include the temperature sensor 16 .

[0100] In other embodiments, although not shown, the display device 1 may further include a cover plate and a sealant. The cover plate may cover the electrophoretic display substrate 11. The sealant may surround the electrophoretic display substrate 11, and the electrophoretic display substrate 11 is sealed between the cover plate and the element array substrate 10 by the sealant. The following embodiments may be modified in the same manner, and will not be repeated below.

[0101] Figure 3 is a schematic top view of a display device according to a second embodiment of the present invention. Figure 4 It corresponds to Figure 3 In order to clearly show the relative arrangement relationship between the humidity sensor 12 and other components, Figure 3The temperature sensor 16 is omitted in the figure. For the relative arrangement relationship between the temperature sensor 16 and other components or film layers, please refer to Figure 4 .

[0102] Please refer to Figure 3 as well as Figure 4 , the display device 1A and Figure 1 as well as Figure 2 The main difference of the display device 1 is that the humidity sensor 12A is a resistive humidity sensor, and the humidity sensor 12A includes a ring-shaped conductive pattern 120 but does not include Figure 1 or Figure 2 The ring-shaped conductive pattern 121 is shown. Figure 4 The annular conductive pattern 120 of the humidity sensor 12A overlaps with the annular conductive pattern 160 of the temperature sensor 16 in the direction D3, but the disclosure is not limited thereto. In other embodiments, the annular conductive pattern 120 and the annular conductive pattern 160 may not overlap or only partially overlap. In other embodiments, although not shown, the display device 1A may not include the temperature sensor 16.

[0103] Figure 5 is a top view schematic diagram of a display device according to a third embodiment of the present invention. Figure 5 , the display device 1B and Figure 3 as well as Figure 4 The main difference of the display device 1A is that the humidity sensor 12B is directly electrically connected to the driving chip 13 without passing through the circuit board 14. Figure 5 A resistive humidity sensor is used as an example, but the humidity sensor 12B may also be a capacitive humidity sensor (e.g., Figure 1 The humidity sensor 12 shown in FIG. 1 ) and the two annular conductive patterns of the capacitive humidity sensor (such as Figure 1 The annular conductive pattern 120 and the annular conductive pattern 121 shown can be directly electrically connected to the driving chip 13 without being electrically connected to the driving chip 13 through the circuit board 14 .

[0104] although Figure 5 Although not shown, the display device 1B may optionally include a temperature sensor (e.g., Figure 2 or Figure 4 The temperature sensor 16 shown in the figure) can be electrically connected to the driver chip 13 through the circuit board 14; or, the temperature sensor can be directly electrically connected to the driver chip 13 without being electrically connected to the driver chip 13 through the circuit board 14.

[0105] Figure 6 is a schematic top view of a display device according to a fourth embodiment of the present invention. Figure 7 yes Figure 6Please refer to Figure 6 as well as Figure 7 , the display device 1C and Figure 1 as well as Figure 2 The main difference between the display device 1 and the display device 1 is that the display device 1C includes a plurality of humidity sensors 12C, and the plurality of humidity sensors 12C are disposed adjacent to a plurality of corners of the display device 1C. Taking a quadrilateral display device as an example, the display device 1C includes, for example, four corners and four humidity sensors 12C, and the four humidity sensors 12C are disposed at the four corners of the display device 1C, but the present invention is not limited thereto. In other embodiments, although not shown, the number of humidity sensors 12C may be greater than, equal to, or less than the number of corners of the display device 1C, and at least one of the plurality of corners of the display device 1C may be disposed with one or more humidity sensors 12C.

[0106] The corners of the display device 1C are usually where moisture can easily enter. Therefore, placing multiple humidity sensors 12C near multiple corners of the display device 1C helps to improve the accuracy of humidity measurement of the electrophoretic display substrate 11. According to different requirements, at least one of the multiple humidity sensors 12C can overlap the electrophoretic display substrate 11 and be located between the electrophoretic display substrate 11 and the element array substrate 10. Figure 6 In the embodiment, all the humidity sensors 12C are overlapped on the electrophoretic display substrate 11 and are located between the electrophoretic display substrate 11 and the device array substrate 10 , for example, but the present disclosure is not limited thereto.

[0107] like Figure 7 As shown, the humidity sensor 12C may include a conductive pattern 122 , and the conductive pattern 122 may be electrically connected to a plurality of pads 140 of the circuit board 14 via a plurality of conductive lines CL1 . Figure 7 The conductive pattern 122 in the figure is only an example of a capacitive humidity sensor or a resistive humidity sensor, and the present disclosure also intends to include other types of conductive patterns. Figure 7 The conductive pattern 122 is shown to be electrically connected to the circuit board 14 via a plurality of wires CL1, and a plurality of signal lines (not shown; such as a plurality of gate lines and a plurality of data lines in the display area described above) are electrically connected to the circuit board 14 via a plurality of wires CL2, but the present disclosure is not limited thereto. For example, although not shown, the plurality of wires CL1 may be directly connected to the driver chip 13 (e.g., see Figure 5 ), so that the conductive pattern 122 can be directly connected to the driver chip 13, and can be electrically connected to the driver chip 13 without passing through the circuit board 14. The embodiments with multiple humidity sensors in this article can be changed in the same way, and will not be repeated below.

[0108] In addition, although not shown Figure 6 as well as Figure 7 The display device 1C may selectively include the aforementioned temperature sensor 16, or the display device 1C may include a plurality of temperature sensors. Figure 6 as well as Figure 7 Similarly to the humidity sensor 12C, each temperature sensor may include a conductive pattern (not shown; such as the conductive pattern 122 or other types of conductive patterns), wherein the conductive pattern may be electrically connected to the circuit board 14 through a plurality of wires (not shown), and then electrically connected to the driver chip 13 through a plurality of wires 15; or, the plurality of wires may be directly connected to the driver chip 13, so that the conductive pattern of the temperature sensor may be electrically connected to the driver chip 13 without passing through the circuit board 14. Similar to the above, the temperature sensor 16 may be disposed on a side of the element array substrate 10 away from the electrophoretic display substrate 11 (e.g. Figure 2 between the substrate SUB1 and the dielectric layer IN1, or between the dielectric layer IN1 and the dielectric layer IN2) to improve the accuracy of temperature sensing.

[0109] Figure 8 is a top view schematic diagram of a display device according to a fifth embodiment of the present invention. Figure 8 , the display device 1D and Figure 6 as well as Figure 7 The main differences of the display device 1C are described as follows.

[0110] The length of the display device 1D in the direction D1 is greater than the length in the direction D2. In addition, the display device 1D includes a plurality of driving chips 13 arranged in the direction D1 and a plurality of circuit boards 14 electrically connected to the plurality of driving chips 13, respectively. In the display device 1D, a plurality of humidity sensors 12C are disposed adjacent to the middle of a plurality of sides of the display device 1D in addition to being disposed adjacent to a plurality of corners of the display device 1D. In addition, in addition to the plurality of humidity sensors 12C overlapping with the electrophoretic display substrate 11, the display device 1D also includes a plurality of humidity sensors 12D that do not overlap with the electrophoretic display substrate 11. The plurality of humidity sensors 12D are disposed, for example, on a portion of the element array substrate 10 that is not covered by the electrophoretic display substrate 11. The plurality of humidity sensors 12C can be used to sense the humidity of the electrophoretic display substrate 11, and the plurality of humidity sensors 12D can be used to sense the humidity around the display device 1D. The conductive pattern of the humidity sensor 12C or the humidity sensor 12D can refer to Figure 7 The conductive pattern 122 or other types of conductive patterns will not be repeated here.

[0111] In addition, although not shown Figure 8 The display device 1D may selectively include the aforementioned temperature sensor 16, or the display device 1C may include a plurality of temperature sensors. Figure 6 as well as Figure 7Similarly to the humidity sensor 12C, each temperature sensor may include a conductive pattern (not shown; such as the conductive pattern 122 or other types of conductive patterns), wherein the conductive pattern may be electrically connected to the circuit board 14 through a plurality of wires (not shown), and then electrically connected to the driver chip 13 through a plurality of wires 15. Alternatively, the plurality of wires may be directly connected to the driver chip 13, so that the conductive pattern of the temperature sensor may be electrically connected to the driver chip 13 without passing through the circuit board 14. Similar to the above, the temperature sensor 16 may be disposed on a side of the element array substrate 10 away from the electrophoretic display substrate 11 (e.g. Figure 2 between the substrate SUB1 and the dielectric layer IN1, or between the dielectric layer IN1 and the dielectric layer IN2) to improve the accuracy of temperature sensing.

[0112] Fig. 9 is a flow chart of a method for driving a display device according to an embodiment of the present invention. Fig.10 This is a graph showing the relationship between the resistance value and humidity of a resistive humidity sensor. Fig.11 It is a graph showing the relationship between the capacitance value and humidity of a capacitive humidity sensor. Fig.12 This is a graph showing the relationship between the resistance value and temperature of a resistive temperature sensor.

[0113] Please refer to Fig. 9 The method for driving a display device may include providing a display device (see step 900). The display device may be a display device of any of the above embodiments, which will not be repeated here.

[0114] The method for driving a display device may further include confirming a resistance value or a capacitance value of a humidity sensor of the display device (refer to step 902). If the humidity sensor is a resistive humidity sensor, step 902 may be to confirm the resistance value of the humidity sensor of the display device. If the humidity sensor is a capacitive humidity sensor, step 902 may be to confirm the capacitance value of the humidity sensor of the display device.

[0115] The method for driving a display device may further include determining the humidity according to the resistance value or the capacitance value of the humidity sensor (see step 904). Fig.10 as well as Fig.11 As shown in the figure, the resistance value of the resistive humidity sensor increases with the increase of humidity, and the capacitance value of the capacitive humidity sensor increases with the increase of humidity. Therefore, after confirming the resistance value of the resistive humidity sensor or the capacitance value of the capacitive humidity sensor, the Fig.10 The humidity and resistance trend diagram shown in the figure or Fig.11 The trend relationship diagram of humidity and capacitance value shown confirms humidity (such as humidity of the electrophoretic display substrate, humidity around the electrophoretic display substrate, or humidity of the electrophoretic display substrate and its surroundings, etc.).

[0116] The method for driving a display device may further include providing a driving waveform according to humidity (see step 910). By sensing the humidity of the electrophoretic display substrate, the humidity around the electrophoretic display substrate, or the humidity of the electrophoretic display substrate and its surroundings, and changing the driving waveform accordingly, optical performance can be improved.

[0117] In an embodiment where the display device includes a temperature sensor, the method for driving the display device may further include determining a resistance value of the temperature sensor of the display device (see step 906) and determining a temperature according to the resistance value of the temperature sensor (see step 908). Fig.12 As shown in Figure 1, the resistance value of the resistance temperature sensor increases as the temperature increases. Therefore, after confirming the resistance value of the resistance temperature sensor, you can Fig.12 The temperature and resistance trend relationship diagram shown confirms the temperature (such as the temperature around the display device). In addition, in step 910, the driving waveform is provided in addition to the humidity. By comprehensively considering environmental factors such as humidity and temperature to change the driving waveform, it is helpful to improve the optical performance.

[0118] although Fig. 9 The temperature sensing step (including step 906 and step 908) is after the humidity sensing step (including step 902 and step 904), but the present disclosure is not limited thereto. In other embodiments, the temperature sensing step may be performed simultaneously with the humidity sensing step or before the humidity sensing step. Alternatively, the method for driving the display device may omit the temperature sensing step, and in step 910, the driving waveform may be provided only according to the humidity, not according to the temperature.

[0119] In summary, in the embodiments of the present invention, the humidity of the electrophoretic display substrate or its surroundings can be determined by a humidity sensor, and a driving waveform can be provided according to the humidity, thereby improving the optical performance of the display device.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 device, characterized in that: include: Component array substrate; An electrophoretic display substrate, disposed on the element array substrate; as well as The humidity sensor comprises a conductive pattern arranged on a side of the element array substrate adjacent to the electrophoretic display substrate.

2. The display device according to claim 1, characterized in that The humidity sensor is a capacitive humidity sensor or a resistive humidity sensor.

3. The display device according to claim 1, characterized in that The conductive pattern surrounds a display area of ​​the display device.

4. The display device according to claim 1, characterized in that The conductive pattern overlaps the electrophoretic display substrate and is located between the electrophoretic display substrate and the element array substrate.

5. The display device according to claim 1, characterized in that: There are multiple humidity sensors, and the multiple humidity sensors are at least disposed adjacent to multiple corners of the display device.

6. The display device according to claim 1, characterized in that: The element array substrate includes a dielectric layer, the electrophoretic display substrate includes an adhesive layer, and the humidity sensor is arranged between the dielectric layer and the adhesive layer.

7. The display device according to claim 1, characterized in that Also includes: The driving chip is arranged in the peripheral area of ​​the display device and is electrically connected to the humidity sensor, the element array substrate and the electrophoretic display substrate.

8. The display device according to claim 7, characterized in that: Also includes: A circuit board, wherein the humidity sensor is electrically connected to the driving chip through the circuit board.

9. The display device according to claim 1, characterized in that: Also includes: The temperature sensor is arranged in the element array substrate and is located at a side away from the electrophoretic display substrate.

10. The display device according to claim 9, characterized in that: The element array substrate comprises a substrate and a gate dielectric layer arranged on the substrate, and the temperature sensor is arranged between the substrate and the gate dielectric layer.

11. The display device according to claim 9, characterized in that Also includes: A driving chip is disposed in the peripheral area of ​​the display device and is electrically connected to the humidity sensor, the temperature sensor, the element array substrate and the electrophoretic display substrate.

12. A method for driving a display device, characterized in that: include: providing a display device; confirming a resistance value or a capacitance value of a humidity sensor of the display device; confirming humidity according to the resistance value or the capacitance value of the humidity sensor; as well as A driving waveform is provided according to the humidity.

13. The method for driving a display device according to claim 12, wherein: Also includes: confirming a resistance value of a temperature sensor of the display device; as well as confirming a temperature according to the resistance value of the temperature sensor; The driving waveform is provided in addition to being based on the humidity and also based on the temperature.

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