TWI765646B - Raindrop sensor device and driving method thereof - Google Patents

Abstract

A raindrop sensor device includes a substrate, a raindrop sensor element, a first light emitting diode and an active element. The raindrop sensor element is located on the substrate and includes a first electrode and a second electrode separated from each other. The first light emitting diode is located on the substrate and is electrically connected to the first electrode. The first electrode and the second electrode are closer to the substrate than the active element. The active element is located on the substrate and is electrically connected to the first light emitting diode.

Description

Raindrop sensing device and driving method thereof

The present invention relates to a raindrop sensing device and a driving method thereof.

When driving a vehicle in rainy weather, the raindrops on the windshield will block the driver's sight and seriously affect the driving safety. Generally, when driving a vehicle, the driver uses the wipers to remove raindrops from the windshield. However, if the rain suddenly increases while the vehicle is driving, the driver may not have time to increase the speed of the wipers to remove raindrops, resulting in obstructed vision. In order to avoid traffic accidents due to blocked vision for drivers, a device that can instantly detect changes in rain conditions is currently required.

The present invention provides a raindrop sensing device, which has both a raindrop sensing function and a display function, and has the advantage of saving circuit layout space.

The present invention provides a driving method for a raindrop sensing device. The raindrop sensing device used has both a raindrop sensing function and a display function, and has the advantage of saving circuit layout space.

At least one embodiment of the present invention provides a raindrop sensing device. The raindrop sensing device includes a substrate, a raindrop sensing element, a first light emitting diode, and an active element. The raindrop sensing element is located on the substrate and includes a first electrode and a second electrode separated from each other. The first light emitting diode is located on the substrate and is electrically connected to the first electrode of the raindrop sensing element. The first electrode and the second electrode are closer to the substrate than the active element. The active element is located on the substrate and is electrically connected to the first light emitting diode.

At least one embodiment of the present invention provides a raindrop sensing device. The raindrop sensing device includes a substrate, a raindrop sensing element, a light emitting diode, and an active element. The raindrop sensing element is located on the substrate and includes a first electrode and a second electrode separated from each other. The light emitting diode is electrically connected to the first electrode of the raindrop sensing element, and the first electrode and the second electrode are closer to the substrate than the active element. The active element is electrically connected to the light emitting diode. A driving method of a raindrop sensing device includes: providing a raindrop sensing device, executing a raindrop sensing mode of the raindrop sensing device, and executing a display mode of the raindrop sensing device. The raindrop sensing mode includes applying a first pulse signal to the raindrop sensing device. The display mode includes applying a second pulse signal to the active element.

FIG. 1A is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. Fig. 1B is a schematic cross-sectional view along line A-A' of Fig. 1A.

Referring to FIGS. 1A and 1B , the raindrop sensing device 10 includes a substrate 100 , a raindrop sensing element 200 , a first light emitting diode L1 and a first sub-pixel control circuit PC1 . In this embodiment, the raindrop sensing device 10 further includes a second light-emitting diode L2, a third light-emitting diode L3, a second sub-pixel control circuit PC2, and a third sub-pixel control circuit PC3.

In this embodiment, the first sub-pixel control circuit PC1, the second sub-pixel control circuit PC2 and the third sub-pixel control circuit PC3 respectively include a first active element T1, a second active element T2 and a third active element T3, but the present invention is not limited to this. In other embodiments, each of the first sub-pixel control circuit PC1, the second sub-pixel control circuit PC2, and the third sub-pixel control circuit PC3 may further include other active elements and/or passive elements. In other words, the present invention does not limit the first sub-pixel control circuit PC1 , the second sub-pixel control circuit PC2 and the third sub-pixel control circuit PC3 to include only one active element.

The material of the substrate 100 can be glass, quartz, organic polymer or other applicable materials. In some embodiments, the substrate 100 is suitable for use in a windshield of a vehicle.

The raindrop sensing element 200 is located on the substrate 100 and includes a first electrode 201 and a second electrode 202 which are separated from each other. In this embodiment, the raindrop sensing device 10 further includes a third electrode 203 , a fourth electrode 204 , a fifth electrode 205 and a sixth electrode 206 . The third electrode 203 and the fourth electrode 204 are separated from each other, and the fifth electrode 205 and the sixth electrode 206 are separated from each other. In some embodiments, the first electrode 201 , the second electrode 202 , the third electrode 203 , the fourth electrode 204 , the fifth electrode 205 and the sixth electrode 206 belong to the same conductive layer, and the material is a transparent conductive material, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium gallium zinc oxide, or a stack of at least two of the above. In this embodiment, the first electrode 201 , the second electrode 202 , the third electrode 203 , the fourth electrode 204 , the fifth electrode 205 and the sixth electrode 206 each include a pad P and a trace C, and the width of the pad P is greater than the width of trace C.

In this embodiment, the raindrops R affect the electric field (or capacitance) between the first electrode 201 and the second electrode 202 , the electric field (or capacitance) between the third electrode 203 and the fourth electrode 204 and/or the fifth electrode The electric field (or capacitance) between the electrode 205 and the sixth electrode 206 . The magnitude of the rain can be known by the change of the electric field.

The first insulating layer 110 (not shown in FIG. 1A ) is located on the substrate 100 and the first electrode 201 , the second electrode 202 , the third electrode 203 , the fourth electrode 204 , the fifth electrode 205 and the sixth electrode of the raindrop sensing element 200 206 on. The first active element T1 , the second active element T2 and the third active element T3 are located on the first insulating layer 110 .

The first active element T1 , the second active element T2 and the third active element T3 each include a channel layer CH, a gate G, a source S and a drain D.

The channel layer CH is on the first insulating layer 110 . The gate insulating layer 120 (not shown in FIG. 1A ) is located on the channel layer CH. The gate G is located on the gate insulating layer 120 (not shown in FIG. 1A ), and overlaps the channel layer CH. The second insulating layer 130 is located on the gate insulating layer 120 and the gate G. The drain electrode D and the source electrode S are located on the second insulating layer 130 and are electrically connected to the channel layer CH through the openings O1 and O2 (not shown in FIG. 1A ). The openings O1 and O2, for example, penetrate through the second insulating layer 130 (not shown in FIG. 1A ) and the gate insulating layer 120 .

In this embodiment, the first active element T1 , the second active element T2 and the third active element T3 are top gate type thin film transistors, but the invention is not limited thereto. According to other embodiments, the above-mentioned first active element T1 , second active element T2 and third active element T3 are bottom gate type thin film transistors, dual gate type thin film transistors or other types of thin film transistors.

In this embodiment, the gates G of the first active element T1, the second active element T2 and the third active element T3 are respectively electrically connected to the first scan line SL1, the second scan line SL2 and the third scan line SL3 , and the respective sources S of the first active element T1 , the second active element T2 and the third active element T3 are electrically connected to a data line DL at the same time, but the invention is not limited to this. In other embodiments, the respective gates G of the first active element T1, the second active element T2 and the third active element T3 are electrically connected to one scan line at the same time, and the first active element T1, the second active element T2 and the The respective sources S of the third active elements T3 are respectively electrically connected to different data lines.

The first light emitting diode L1 , the second light emitting diode L2 , and the third light emitting diode L3 are located on the substrate 100 . In this embodiment, the first light emitting diode L1 , the second light emitting diode L2 , and the third light emitting diode L3 are located on the second insulating layer 130 . The respective drains D of the first active element T1, the second active element T2 and the third active element T3 are respectively electrically connected to the first light emitting diode L1, the second light emitting diode L2 and the third light emitting diode L3 . The first light-emitting diode L1, the second light-emitting diode L2, and the third light-emitting diode L3 are, for example, micro-light-emitting diodes (micro-LED), mini-LEDs, and organic light-emitting diodes. Diodes (OLEDs) or other suitable light emitting diodes. In this embodiment, the first light emitting diode L1, the second light emitting diode L2 and the third light emitting diode L3 are located in the same pixel PX of the raindrop sensing device 10, and the first light emitting diode L1 The second light-emitting diode L2 and the third light-emitting diode L3 are light-emitting diodes of different colors, such as green light-emitting diodes, red light-emitting diodes, and blue light-emitting diodes. In some embodiments, the first light emitting diode L1 , the second light emitting diode L2 , and the third light emitting diode L3 are suitable for displaying driving information to the driver in the car or other people outside the car.

In this embodiment, the first light emitting diode L1 , the second light emitting diode L2 , the third light emitting diode L3 and the raindrop sensing element 200 are located on the same side of the substrate 100 , for example, the raindrops R will not be directly exposed to the raindrops. inside. In some embodiments, the first light emitting diode L1 , the second light emitting diode L2 , and the third light emitting diode L3 emit light toward the outside (eg, toward the substrate 100 ), so as to display information to the driving of other vehicles outside the vehicle people or passers-by, but the present invention is not limited to this. In other embodiments, the first light emitting diode L1 , the second light emitting diode L2 , and the third light emitting diode L3 emit light inward (eg, facing away from the substrate 100 ) to display information to the driver in the vehicle .

In this embodiment, the first light emitting diode L1, the second light emitting diode L2, and the third light emitting diode L3 each include a semiconductor SM, a first pad PD1 and a second pad PD2. The semiconductor SM is, for example, a multilayer structure. The first pad PD1 and the second pad PD2 are electrically connected to the semiconductor SM. The respective first pads PD1 of the first light emitting diode L1 , the second light emitting diode L2 and the third light emitting diode L3 are respectively electrically connected to the first electrode 201 and the third electrode 203 of the raindrop sensing element 200 . and the fifth electrode 205 . The respective second pads PD2 of the first light-emitting diode L1, the second light-emitting diode L2, and the third light-emitting diode L3 are electrically connected to the first active element T1, the second active element T2, and the third active element, respectively. The respective drains D of the elements T3.

In this embodiment, the raindrop sensing device 10 further includes a plurality of first transfer electrodes TE1 (not shown in FIG. 1A ) and a plurality of second transfer electrodes TE2 (not shown in FIG. 1A ). The respective first pads PD1 of the first light-emitting diode L1, the second light-emitting diode L2, and the third light-emitting diode L3 pass through the corresponding first transfer electrode TE1 and the corresponding second transfer electrode TE2, respectively. It is electrically connected to the first electrode 201 , the third electrode 203 and the fifth electrode 205 of the raindrop sensing element 200 . In this embodiment, the plurality of first transfer electrodes TE1 are located on the first insulating layer 110 , and are respectively electrically connected through the plurality of first through holes TH1 (not shown in FIG. 1A ) passing through the first insulating layer 110 . Connected to the first electrode 201 , the third electrode 203 and the fifth electrode 205 of the raindrop sensing element 200 . The gate insulating layer 120 is located on the first transfer electrode TE1. A plurality of second transfer electrodes TE2 are located on the second insulating layer 130 and are electrically connected to the corresponding first transfer electrodes through a plurality of second through holes TH2 (not shown in FIG. 1A ) passing through the second insulating layer 130 . Connect to electrode TE1. In this embodiment, the second through holes TH2 pass through the second insulating layer 130 and the gate insulating layer 120 . The respective first pads PD1 of the first light-emitting diode L1, the second light-emitting diode L2, and the third light-emitting diode L3 are electrically connected to the corresponding second transfer electrodes TE2. In other words, the first light emitting diode L1, the second light emitting diode L2, and the third light emitting diode L3 are respectively electrically connected through the plurality of second transfer electrodes TE2 and the plurality of first transfer electrodes TE1 to the first electrode 201 , the third electrode 203 and the fifth electrode 205 of the raindrop sensing element 200 .

In this embodiment, the first electrode 201 , the second electrode 202 , the third electrode 203 , the fourth electrode 204 , the fifth electrode 205 and the sixth electrode 206 of the raindrop sensing element 200 are more The active element T2 and the third active element T3 are closer to the substrate 100, thereby preventing the signal of the raindrop R from being affected by the first sub-pixel control circuit PC1, the second sub-pixel control circuit PC2 and the third sub-pixel control circuit PC3. shade. In this embodiment, the first electrode 201 , the second electrode 202 , the third electrode 203 , the fourth electrode 204 , the fifth electrode 205 and the sixth electrode 206 of the raindrop sensing element 200 are compared with the first light emitting diode L1 , The second light emitting diode L2 and the third light emitting diode L3 are closer to the substrate 100, thereby preventing the signal of the raindrop R from being affected by the first light emitting diode L1, the second light emitting diode L2, and the third light emitting diode. occluded by body L3.

In this embodiment, the first electrode 201, the first pad PD1 of the first light-emitting diode L1, the third electrode 203, the first pad PD1 of the second light-emitting diode L2, the fifth electrode 205, the third electrode The first pads PD1 of the three light-emitting diodes L3 are all electrically connected to the ground signal. Therefore, the first pads PD1 of the first light-emitting diodes L1 are electrically connected to the first electrode 201, so that the second light-emitting diodes The first pad PD1 of the pole body L2 is electrically connected to the third electrode 203 , and the first pad PD1 of the third light emitting diode L3 is electrically connected to the fifth electrode 205 , which has the advantage of saving circuit layout space. In some embodiments, in the direction DR perpendicular to the substrate 100, the first electrode 201 partially overlaps the first light emitting diode L1, the third electrode 203 partially overlaps the second light emitting diode L2, and the fifth electrode 205 partially overlaps overlapped with the third light emitting diode L3.

In this embodiment, the raindrop sensing device 10 has both a raindrop sensing function and a display function.

FIG. 2 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. It must be noted here that the embodiment of FIG. 2 uses the element numbers and part of the content of the embodiment of FIG. 1A and FIG. 1B , wherein the same or similar numbers are used to represent the same or similar elements, and the same technical content is omitted. illustrate. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated here.

The difference between the raindrop sensing device 10a of FIG. 2 and the raindrop sensing device 10 of FIG. 1A is that in the raindrop sensing device 10a of FIG. 2 , the same pixel PX has a first light-emitting diode L1 and a second light-emitting diode L1. The pole body L2, the third light emitting diode L3 and the fourth light emitting diode L4. The fourth light-emitting diode L4 is, for example, a white light-emitting diode, a yellow light-emitting diode or a light-emitting diode of other colors.

In this embodiment, the raindrop sensing device 10a further includes a fourth sub-pixel control circuit PC4 and a fourth light emitting diode L4. The fourth sub-pixel control circuit PC4 includes a fourth active element T4, and the drain electrode D of the fourth active element T4 is electrically connected to the second pad PD2 of the fourth light emitting diode L4. In this embodiment, the raindrop sensing element 200 a further includes a seventh electrode 207 and an eighth electrode 208 . The seventh electrode 207 and the eighth electrode 208 are separated from each other. The first pad PD1 of the fourth light emitting diode L4 is electrically connected to the seventh electrode 207 .

In this embodiment, the respective gates G of the first active element T1, the second active element T2, the third active element T3 and the fourth active element T4 are electrically connected to the first scan line SL1 and the second scan line SL2, respectively. , the third scan line SL3 and the fourth scan line SL4.

In this embodiment, the respective sources S of the first active element T1 , the second active element T2 , the third active element T3 and the fourth active element T4 are electrically connected to the same data line DL.

In this embodiment, the raindrop sensing device 10a has both a raindrop sensing function and a display function.

3A is a schematic circuit diagram of a raindrop sensing device according to an embodiment of the present invention. 3B is a timing diagram of a driving method of a raindrop sensing device according to an embodiment of the present invention. The raindrop sensing device corresponding to FIG. 3A and FIG. 3B is, for example, the raindrop sensing device 10a of FIG. 2 .

Please refer to FIG. 2 and FIG. 3A , in this embodiment, the raindrop sensing element 200 a further includes a control circuit 210 (not shown in FIG. 2 ). The control circuit 210 is formed on the substrate 100, for example.

In this embodiment, the capacitor C1 includes a first electrode 201 and a second electrode 202, wherein the first electrode 201 of the capacitor C1 is electrically connected to the first pad PD1 of the first light-emitting diode L1, and the first electrode of the capacitor C1 is electrically connected to the first pad PD1 of the first light-emitting diode L1. The two electrodes 202 are electrically connected to the control circuit 210 when the switch Q1 is in a closed state (ON). The capacitor C2 includes a third electrode 203 and a fourth electrode 204, wherein the third electrode 203 of the capacitor C2 is electrically connected to the first pad PD1 of the second light emitting diode L2, and the fourth electrode 204 of the capacitor C2 is connected to the switch Q2 When in a closed state (ON), it is electrically connected to the control circuit 210 . The capacitor C3 includes a fifth electrode 205 and a sixth electrode 206, wherein the fifth electrode 205 of the capacitor C3 is electrically connected to the first pad PD1 of the third light-emitting diode L3, and the sixth electrode 206 of the capacitor C3 is connected to the switch Q3 When in a closed state (ON), it is electrically connected to the control circuit 210 . The capacitor C4 includes a seventh electrode 207 and an eighth electrode 208, wherein the seventh electrode 207 of the capacitor C4 is electrically connected to the first pad PD1 of the fourth light emitting diode L4, and the eighth electrode 208 of the capacitor C4 is connected to the switch Q4 When in a closed state (ON), it is electrically connected to the control circuit 210 .

In some embodiments, the control circuit 210 includes transistors X1 ˜ X7 . In some embodiments, the transistors X1 , X2 and X7 are P-type metal oxide semiconductor field effect transistors. The transistors X5 and X6 are N-type metal oxide semiconductor field effect transistors.

Please refer to FIG. 3A and FIG. 3B , in this embodiment, the raindrop sensing mode of the raindrop sensing device 10 a is executed. The raindrop sensing mode includes a write phase and an erase phase.

During the writing phase, a pulse signal CL1 is applied to the transistor X7 of the raindrop sensing device 10a to charge one or more of the capacitors C1-C4. During the writing phase, the transistors X1 and X2 are in a closed state (ON), and the transistors X4, X5 and X6 are in an open state (OFF), and the transistors X3 and X4 can be selectively in an open state or a closed state. When the transistor X7 is in a closed state by the pulse signal CL1, the signal Vcc is transmitted to one or more of the capacitors C1-C4. The switch Q1 ˜ Q4 between the capacitors C1 ˜ C4 and the control circuit 210 can determine which (or which) the signal Vcc is to be transmitted to among the capacitors C1 ˜ C4 . The signal Vcc is, for example, a constant voltage signal.

In some embodiments, when the transistor X7 is in a closed-circuit state (ON), the current flows into the capacitor Cint in addition to the capacitors C1 ˜ C4 . The output signal Vout can be read out by a chip or other electronic components. The output signal Vout of FIG. 3A corresponds to the output signals Vo1 to Vo4 of FIG. 3B , and the output signals Vo1 to Vo4 correspond to the capacitors C1 to C4 respectively.

During the erasing phase, a pulse signal CL2 is applied to the transistors X5 and X6 of the raindrop sensing device 10a to discharge the capacitors C1-C4. It can also be said that both electrodes of each of the capacitors C1 to C4 are electrically connected to the ground voltage Vss. During the erasing stage, the transistor X7 is in an open state (OFF), that is, the pulse signal CL1 is not applied to the transistor X7.

In some embodiments, when the transistors X5 and X6 are in a closed state (ON), in addition to the discharge of the capacitors C1 ˜ C4 , the capacitor Cint is also discharged. The output signal Vout can be read out by a chip or other electronic components.

Please refer to FIG. 2 and FIG. 3B , in this embodiment, the display mode of the raindrop sensing device 10 a is executed. The display mode includes applying an activation signal to the first active element T1 , the second active element T2 , the third active element T3 and the fourth active element T4 . For example, through the first scan line SL1, the second scan line SL2, the third scan line SL3 and the fourth scan line SL4, the first active element T1, the second active element T2, and the third active element T3 are sequentially connected to the and the fourth active element T4 applies an activation signal.

In this embodiment, the display mode and the raindrop sensing mode of the raindrop sensing device 10a may be executed simultaneously or not at the same time.

4 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. It must be noted here that the embodiment of FIG. 4 uses the element numbers and part of the content of the embodiment of FIG. 1A and FIG. 1B , wherein the same or similar numbers are used to represent the same or similar elements, and the same technical content is omitted. illustrate. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated here.

The difference between the raindrop sensing device 10b of FIG. 4 and the raindrop sensing device 10 of FIG. 1A is that in the raindrop sensing device 10b of FIG. 4 , the first light-emitting diode L1 , the second light-emitting diode L2 , the third light-emitting diode The light emitting diodes L3 are all electrically connected to the first electrode 201 of the raindrop sensing element 200 .

In this embodiment, the first electrode 201 and the second electrode 202 include a plurality of pads P and traces C electrically connected to the plurality of pads P, and the width of the pads P is greater than the width of the traces C. The pad P of the first electrode 201 is partially overlapped with the first light emitting diode L1, the second light emitting diode L2, and the third light emitting diode L3.

In this embodiment, the raindrop sensing device 10b has both a raindrop sensing function and a display function.

FIG. 5 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. It must be noted here that the embodiment of FIG. 5 uses the element numbers and part of the content of the embodiment of FIG. 4 , wherein the same or similar numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated here.

The difference between the raindrop sensing device 10c of FIG. 5 and the raindrop sensing device 10b of FIG. 4 is that in this embodiment, the size of the first electrode 201 of the raindrop sensing device 10c is larger than the size of the first light emitting diode L1, The size of the second light emitting diode L2 and the size of the second light emitting diode L3.

In this embodiment, a pad P of the first electrode 201 is partially overlapped with the first light emitting diode L1, the second light emitting diode L2, and the third light emitting diode L3, and the size of one pad P is larger than The size of the first light emitting diode L1, the size of the second light emitting diode L2, and the size of the second light emitting diode L3.

In this embodiment, the raindrop sensing device 10c has both a raindrop sensing function and a display function.

6A is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. Fig. 6B is a schematic cross-sectional view taken along line B-B' of Fig. 6A. Fig. 6C is a schematic cross-sectional view taken along line C-C' of Fig. 6A. It must be noted here that the embodiments of FIGS. 6A to 6C use the element numbers and part of the content of the embodiment of FIGS. 1A and 1B , wherein the same or similar numbers are used to represent the same or similar elements, and the same elements are omitted. Description of technical content. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated here.

The difference between the raindrop sensing device 10d of FIGS. 6A to 6C and the raindrop sensing device 10 of FIG. 1A is that the raindrop sensing device 10d of FIGS. 6A to 6C further includes a first switching element SW1, a second switching element SW2 and a first switching element SW2. Three switching elements SW3.

Referring to FIGS. 6A to 6C , the first switching element SW1 , the second switching element SW2 and the third switching element SW3 are located on the substrate 100 . The first switching element SW1, the second switching element SW2, and the third switching element SW3 each include a channel layer CHa, a gate electrode Ga, a source electrode Sa, and a drain electrode Da.

The channel layer CHa is located on the first insulating layer 110 (not shown in FIG. 6A ). The gate insulating layer 120 (not shown in FIG. 6A ) is located on the channel layer CHa. The gate electrode Ga is located on the gate electrode insulating layer 120 and overlapped with the channel layer CHa. The second insulating layer 130 is located on the gate insulating layer 120 and the gate electrode Ga. The drain electrode Da and the source electrode Sa are located on the second insulating layer 130 (not shown in FIG. 6A ), and are electrically connected to the channel layer CHa through the openings O3 and O4 (not shown in FIG. 6A ). The openings O3 and O4 penetrate through the second insulating layer 130 and the gate insulating layer 120 , for example.

In this embodiment, the first switching element SW1 , the second switching element SW2 and the third switching element SW3 are top gate type thin film transistors, but the invention is not limited thereto. According to other embodiments, the above-mentioned first switching element SW1 , second switching element SW2 and third switching element SW3 are bottom gate type thin film transistors, double gate type thin film transistors or other types of thin film transistors.

In this embodiment, the gates Ga of the first switching element SW1 , the second switching element SW2 and the third switching element SW3 are respectively electrically connected to the first control line Y1 , the second control line Y2 and the third control line Y3 .

In this embodiment, the source Sa of the first switching element SW1 is electrically connected to the drain D of the first active element T1 and the second pad PD2 of the first light emitting diode L1, and the source of the second switching element SW2 The electrode Sa is electrically connected to the drain electrode D of the second active element T2 and the second pad PD2 of the second light emitting diode L2, and the source electrode Sa of the third switching element SW3 is electrically connected to the drain electrode of the third active element T3. The pole D and the second pad PD2 of the third light emitting diode L3.

In this embodiment, the drain electrode Da of the first switching element SW1 is electrically connected to the second electrode 202 of the raindrop sensing element 200 , and the drain electrode Da of the second switching element SW2 is electrically connected to the second electrode 202 of the raindrop sensing element 200 . With four electrodes 204 , the drain electrode Da of the third switching element SW3 is electrically connected to the sixth electrode 206 of the raindrop sensing element 200 . In this embodiment, the drain electrode Da of the first switching element SW1, the drain electrode Da of the second switching element SW2, and the drain electrode Da of the third switching element SW3 are also electrically connected to the control circuit ( 6A is omitted from drawing). In this embodiment, the plurality of third transfer electrodes TE3 (not shown in FIG. 6A ) are located on the first insulating layer 110 and are electrically connected to the first insulating layer 110 through the plurality of third through holes TH3 respectively. The second electrode 202 , the fourth electrode 204 and the sixth electrode 206 of the raindrop sensing element 200 . The gate insulating layer 120 is located on the third transfer electrode TE3. The drain electrode Da of the first switching element SW1 , the drain electrode Da of the second switching element SW2 , and the drain electrode Da of the third switching element SW3 are located on the second insulating layer 130 , and pass through a plurality of second insulating layers passing through the second insulating layer 130 . The four through holes TH4 are respectively electrically connected to the plurality of third transfer electrodes TE3.

In this embodiment, the first switching element SW1, the second switching element SW2 and the third switching element SW3 can prevent the control circuit of the sensing element 200 from interfering with the first light emitting diode L1 and the second light emitting diode in the display mode body L2 and the third light emitting diode L3.

FIG. 7 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. It must be noted here that the embodiment of FIG. 7 uses the element numbers and part of the content of the embodiment of FIG. 6A to FIG. 6C , wherein the same or similar numbers are used to represent the same or similar elements, and the same technical content is omitted. illustrate. For the description of the omitted part, reference may be made to the foregoing embodiments, which will not be repeated here.

The difference between the raindrop sensing device 10e of FIG. 7 and the raindrop sensing device 10d of FIGS. 6A to 6C is that in the raindrop sensing device 10e of FIG. 7 , the same pixel PX has the first light emitting diode L1, the Two light emitting diodes L2, a third light emitting diode L3 and a fourth light emitting diode L4. The fourth light-emitting diode L4 is, for example, a white light-emitting diode, a yellow light-emitting diode or a light-emitting diode of other colors.

In this embodiment, the raindrop sensing device 10e further includes a fourth sub-pixel control circuit PC4, a fourth light emitting diode L4 and a fourth switch element SW4. The fourth sub-pixel control circuit PC4 includes a fourth active element T4, and the drain of the fourth active element T4 is electrically connected to the source Sa of the fourth switching element SW4 and the second pad of the fourth light emitting diode L4 PD2. In this embodiment, the raindrop sensing element 200 a further includes a seventh electrode 207 and an eighth electrode 208 . The seventh electrode 207 and the eighth electrode 208 are separated from each other. The first pad PD1 of the fourth light emitting diode L4 is electrically connected to the seventh electrode 207 . The drain of the fourth switch element SW4 is electrically connected to the eighth electrode 208 .

In this embodiment, the respective gates G of the first active element T1, the second active element T2, the third active element T3 and the fourth active element T4 are electrically connected to the first scan line SL1 and the second scan line SL2, respectively. , the third scanning line SL3 and the fourth scanning line SL4, the gate electrodes Ga of the first switching element SW1, the second switching element SW2, the third switching element SW3 and the fourth switching element SW4 are respectively electrically connected to the first control line Y1, the second control line Y2, the third control line Y3, and the fourth control line Y4.

In this embodiment, the respective sources S of the first active element T1 , the second active element T2 , the third active element T3 and the fourth active element T4 are electrically connected to the same data line DL.

In this embodiment, the raindrop sensing device 10e has both a raindrop sensing function and a display function.

8A is a schematic circuit diagram of a raindrop sensing device according to an embodiment of the present invention. 8B is a timing diagram of a driving method of a raindrop sensing device according to an embodiment of the present invention. The raindrop sensing device corresponding to FIG. 8A and FIG. 8B is, for example, the raindrop sensing device 10e of FIG. 7 .

Please refer to FIG. 7 , FIG. 8A and FIG. 8B , in this embodiment, the raindrop sensing element 200 a further includes a control circuit 210 (not shown in FIG. 2 ). For the related description of the control circuit 210 , reference may be made to FIG. 3A and the relevant paragraphs in FIG. 3A , which will not be repeated here.

In this embodiment, when the raindrop sensing mode of the raindrop sensing device 10e is executed, the signals of the first control line Y1, the second control line Y2, the third control line Y3 and the fourth control line Y4 are pulled down, so that the signals of the first control line Y1, the second control line Y2, the third control line Y3 and the fourth control line Y4 are The first switching element SW1, the second switching element SW2, the third switching element SW3 and the fourth switching element SW4 are in an open state (OFF) to prevent the control circuit 210 from affecting the first light emitting diode L1 and the second light emitting diode L2, the third light emitting diode L3 and the fourth light emitting diode L4.

When the display mode of the raindrop sensing device 10e is executed, the signals of the first control line Y1, the second control line Y2, the third control line Y3 and the fourth control line Y4 are pulled up, so that the first switching element SW1, the second control line Y3 and the fourth control line Y4 are pulled up. The switch element SW2, the third switch element SW3 and the fourth switch element SW4 are in a closed state (ON), and the switches Q1 to Q4 are disconnected, thereby preventing the control circuit 210 from affecting the first light-emitting diode L1 and the second light-emitting diode. The pole body L2, the third light emitting diode L3 and the fourth light emitting diode L4.

In the present embodiment, the display mode of the raindrop sensing device 10e and the raindrop sensing mode are not simultaneously performed. In other words, the display mode and the raindrop sensing mode of the raindrop sensing apparatus 10e may be alternately performed.

10, 10a, 10b, 10c, 10d, 10e: Raindrop Sensing Devices 100: Substrate 110: first insulating layer 120: gate insulating layer 130: Second insulating layer 200, 200a: Raindrop sensing element 201: First Electrode 202: Second electrode 203: Third electrode 204: Fourth electrode 205: Fifth electrode 206: Sixth Electrode 207: Seventh Electrode 208: Eighth Electrode 210: Control circuit C: route CH, Cha: channel layer CL1, CL2: pulse signal C1~C4, Cint: Capacitor D, Da: drain pole DL: data line DR: direction G, Ga: gate L1: The first light-emitting diode L2: The second light-emitting diode L3: the third light-emitting diode L4: Fourth light-emitting diode O1, O2, O3, O4: Opening P: Pad PC1: The first sub-pixel control circuit PC2: The second sub-pixel control circuit PC3: The third sub-pixel control circuit PC4: Fourth sub-pixel control circuit PD1: first pad PD2: Second pad Q1~Q4: switch R: raindrops S, Sa: source SL1: first scan line SL2: Second scan line SL3: Third scan line SL4: Fourth scan line SM: Semiconductor SW1: The first switching element SW2: Second switching element SW3: the third switching element SW4: Fourth switching element TE1: The first transition electrode TE2: Second transition electrode TE3: The third transition electrode TH1, TH2, TH3, TH4: through holes T1: The first active element T2: The second active element T3: The third active element T4: Fourth active element Vo1~Vo4: output signal X1~X7: Transistor Y1: The first control line Y2: The second control line Y3: The third control line Y4: Fourth control line

FIG. 1A is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. Fig. 1B is a schematic cross-sectional view along line A-A' of Fig. 1A. FIG. 2 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. 3A is a schematic circuit diagram of a raindrop sensing device according to an embodiment of the present invention. 3B is a timing diagram of a driving method of a raindrop sensing device according to an embodiment of the present invention. 4 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. FIG. 5 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. 6A is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. Fig. 6B is a schematic cross-sectional view taken along line B-B' of Fig. 6A. Fig. 6C is a schematic cross-sectional view taken along line C-C' of Fig. 6A. FIG. 7 is a schematic top view of a raindrop sensing device according to an embodiment of the present invention. 8A is a schematic circuit diagram of a raindrop sensing device according to an embodiment of the present invention. 8B is a timing diagram of a driving method of a raindrop sensing device according to an embodiment of the present invention.

10: Raindrop Sensing Device 100: Substrate 110: first insulating layer 120: gate insulating layer 130: Second insulating layer 201: First Electrode 202: Second electrode CH: channel layer D: drain DR: direction G: gate L1: The first light-emitting diode O1, O2: Opening PD1: first pad PD2: Second pad R: raindrops S: source SM: Semiconductor TE1: The first transition electrode TE2: Second transition electrode TH1, TH2: through hole T1: The first active element

Claims (15)

A raindrop sensing device comprises: a substrate; a raindrop sensing element located on the substrate and comprising a first electrode and a second electrode separated from each other; a first light emitting diode located on the substrate, and electrically connected to the first electrode of the raindrop sensing element, wherein in the direction perpendicular to the substrate, the first electrode of the raindrop sensing element partially overlaps the first light emitting diode; and an active element , located on the substrate and electrically connected to the first light emitting diode, and the first electrode and the second electrode are closer to the substrate than the active element. The raindrop sensing device of claim 1, wherein the first light emitting diode comprises: a semiconductor; a first pad electrically connected to the semiconductor and the first electrode of the raindrop sensing element; and A second pad is electrically connected to the semiconductor and the active element. The raindrop sensing device of claim 2, wherein the first pad of the first light emitting diode and the first electrode of the raindrop sensing element are electrically connected to a ground signal. The raindrop sensing device according to claim 2, further comprising: a switch element located on the substrate, and the source of the switch element is electrically connected to the second pad of the active element and the first light emitting diode, and the drain of the switch element is electrically connected to the second electrode of the raindrop sensing element. The raindrop sensing device according to claim 2, further comprising: a first insulating layer on the substrate, the first electrode and the second electrode, and the active element on the first insulating layer; a first insulating layer A transfer electrode located on the first insulating layer and electrically connected to the first electrode of the raindrop sensing element through a first through hole passing through the first insulating layer, and a gate insulating layer on the first transfer electrode and the first insulating layer; a second insulating layer on the gate insulating layer; and a second transfer electrode on the second insulating layer and passing through the gate A second through hole of the second insulating layer is electrically connected to the first transfer electrode, and the first pad of the first light emitting diode is electrically connected to the second transfer electrode. The raindrop sensing device according to claim 5, further comprising: a switch element located on the substrate, and a source of the switch element is electrically connected to the active element and the second one of the first light emitting diode pads; and a third transfer electrode located on the first insulating layer and electrically connected to the second electrode of the raindrop sensing element through a third through hole passing through the first insulating layer, And the gate insulating layer is located on the third transfer electrode, wherein the drain of the switching element is located on the second insulating layer, and is electrically connected to the first through a fourth through hole of the second insulating layer. Three transfer electrodes. The raindrop sensing device according to claim 1, further comprising: a second light emitting diode located on the substrate and electrically connected to the first electrode of the raindrop sensing element. The raindrop sensing device of claim 7, wherein the first light emitting diode and the second light emitting diode are located in the same pixel of the raindrop sensing device. The raindrop sensing device of claim 7, wherein the size of the first electrode of the raindrop sensing element is larger than the size of the first light emitting diode and the size of the second light emitting diode. The raindrop sensing device according to claim 1, further comprising: a second light emitting diode located on the substrate; and wherein the raindrop sensing element further comprises a third electrode and a fourth electrode separated from each other, And the second light emitting diode is electrically connected to the third electrode of the raindrop sensing element. The raindrop sensing device of claim 1, wherein the first light emitting diode and the raindrop sensing element are located on the same side of the substrate. A driving method of a raindrop sensing device, comprising: providing a raindrop sensing device, wherein the raindrop sensing device comprises: a substrate; a raindrop sensing element located on the substrate and comprising a first electrode separated from each other and a second electrode; a light emitting diode electrically connected to the first electrode of the raindrop sensing element; and an active element electrically connected to the light emitting diode, and the first electrode and the second electrode are closer to the substrate than the active element; a raindrop sensing mode of the raindrop sensing device is executed, the raindrop sensing The mode includes applying a first pulse signal to the raindrop sensing device; and executing a display mode of the raindrop sensing device, the display mode including applying a second pulse signal to the active element. The driving method of a raindrop sensing device according to claim 12, wherein the raindrop sensing mode and the display mode are alternately performed. The driving method of the raindrop sensing device as claimed in claim 13, further comprising: a switching element located on the substrate, and a source of the switching element is electrically connected to a connection between the active element and the first light emitting diode The second pad, and the drain electrode of the switch element is electrically connected to the second electrode of the raindrop sensing element. The driving method of a raindrop sensing device as claimed in claim 12, wherein the raindrop sensing mode and the display mode are simultaneously performed.

Images