CN114882851A

CN114882851A - Transparent display panel, driving method thereof and display device

Info

Publication number: CN114882851A
Application number: CN202210531366.6A
Authority: CN
Inventors: 张春芳; 刘伟星; 彭锦涛; 徐智强; 滕万鹏; 郭凯; 卢美荣
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-08-09

Abstract

The invention provides a transparent display panel, a driving method thereof and a display device, wherein the transparent display panel comprises: the display device comprises a substrate base plate, a plurality of first sub-pixels and second sub-pixels, wherein the plurality of first sub-pixels are positioned in a display area of the substrate base plate, and the second sub-pixels are positioned at gaps of the first sub-pixels; wherein at least part of the plurality of first sub-pixels as target sub-pixels are coupled with at least one second sub-pixel at the same data signal terminal, and the color and/or light transmittance of the second sub-pixels are configured to be reversibly changed under the control of the data signal terminal. For improving the display effect of the transparent display device.

Description

Transparent display panel, driving method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a transparent display panel, a driving method thereof and a display device.

Background

With the development of display technology, display devices are in a multifunctional design. Among them, a transparent display device having both a display function and a certain light transmittance is widely used. How to improve the use performance of the transparent display device becomes a technical problem which needs to be solved urgently.

Disclosure of Invention

The invention provides a transparent display panel, a driving method thereof and a display device, which are used for improving the display effect of a transparent display device.

In a first aspect, an embodiment of the present invention provides a transparent display panel, including:

the display device comprises a substrate base plate, a plurality of first sub-pixels and second sub-pixels, wherein the plurality of first sub-pixels are positioned in a display area of the substrate base plate, and the second sub-pixels are positioned at gaps of the first sub-pixels;

wherein at least part of the plurality of first sub-pixels as target sub-pixels are coupled with at least one second sub-pixel at the same data signal terminal, and the color and/or light transmittance of the second sub-pixels are configured to be reversibly changed under the control of the data signal terminal.

In one possible implementation, the first sub-pixel includes a light emitting device and a first driving circuit, and the second sub-pixel includes an electrochromic device and a second driving circuit; in the display area, the light emitting devices are arranged in an array mode, the electrochromic device is arranged around the light emitting device of the target sub-pixel, and the orthographic projection of the electrochromic device on the substrate base plate and the orthographic projection of the light emitting device on the substrate base plate are not overlapped.

In one possible implementation manner, the electrochromic devices coupled to the same data signal terminal and the same target sub-pixel are independent from each other.

In a possible implementation manner, the electrochromic device coupled to the same data signal terminal with the same target sub-pixel is disposed on a light emitting device side of the target sub-pixel.

In one possible implementation, the second driving circuit includes: a drive transistor, a data write transistor and a storage capacitor;

the grid electrode of the data writing transistor is coupled with the reset control end of the target sub-pixel, the first pole of the data writing transistor is coupled with the data signal end, and the second pole of the data writing transistor is coupled with the grid electrode of the driving transistor;

a first electrode of the driving transistor is coupled with a first power supply end, a second electrode of the driving transistor is coupled with a first electrode of the electrochromic device, and a second electrode of the electrochromic device is coupled with a second power supply end;

the storage capacitor is coupled between the gate and the second pole of the driving transistor.

In one possible implementation, an orthographic projection of the driving transistor and the data writing transistor on the substrate at least partially overlaps with an orthographic projection of the light emitting device of the first sub-pixel on the substrate.

In one possible implementation, the second electrodes of the electrochromic devices are connected to each other to form an integral structure.

In one possible implementation, the light emitting device is a micro inorganic light emitting diode or an organic light emitting diode.

In a possible implementation manner, the color and/or the light transmittance of the second sub-pixel are configured to be reversibly changed under the control of the data signal terminal, so that the second sub-pixel can assume any two states of a transparent state, a black state and a colored state, wherein the light transmittance of the colored state is not less than the light transmittance in the black state and is less than the light transmittance in the transparent state.

In a second aspect, embodiments of the present invention further provide a display device, including the transparent display panel described in any one of the above.

In a third aspect, an embodiment of the present invention further provides a method for driving a transparent display panel, including:

in a reset phase of the target sub-pixel, providing a first data signal to the data signal terminal so that the second sub-pixel is driven by the first data signal to adjust a coloring state;

and in the light-emitting stage of the target sub-pixel, providing a second data signal to the data signal terminal so that the target sub-pixel emits light under the driving of the second data signal.

In one possible implementation manner, the resetting phase of the target sub-pixel includes a first sub-phase and a second sub-phase, and the providing the first data signal to the data signal terminal in the resetting phase of the target sub-pixel includes:

in the first sub-stage, a reset signal is provided for the data signal end, and the second sub-pixel is reset;

and in the second sub-phase, providing the first data signal to the data signal terminal, wherein the voltage value of the first data signal is smaller than that of the reset signal.

In one possible implementation, the second sub-pixel includes an electrochromic device and a second driving circuit, a first electrode of a driving transistor of the second driving circuit is coupled to a first power source terminal, and the method further includes:

and adjusting the voltage value of the voltage signal loaded to the first power supply end according to the light intensity change of the external environment so as to change the light transmittance of the second sub-pixel in the coloring state.

The invention has the following beneficial effects:

the embodiment of the invention provides a transparent display panel, a driving method thereof and a display device, wherein the transparent display panel comprises a substrate, a plurality of first sub-pixels and second sub-pixels, wherein the first sub-pixels are positioned in a display area of the substrate; at least part of the first sub-pixels serving as target sub-pixels and at least one second sub-pixel are coupled to the same data signal terminal, for example, the sub-pixel a of the first sub-pixels and the sub-pixel b of the at least one second sub-pixels are both coupled to the data signal terminal c; wherein the color and/or light transmittance of the second sub-pixel is configured to reversibly change under the control of the data signal terminal. That is, under the control of the data signal terminal, the color and/or the light transmittance of the corresponding region of the second sub-pixel can be driven to reversibly change, so that the second sub-pixel can present the corresponding colored state, thereby changing the light transmittance of the corresponding region of the second sub-pixel. In this way, the pixel-level flexible control of the light transmittance is realized, for example, the light transmittance of the area with picture display is adjusted to be low, and the light transmittance of the area without picture display is adjusted to be high, so that the display effect of the transparent display device is improved.

Drawings

Fig. 1 is a schematic view of one of transparent effects of a transparent display device in the related art;

fig. 2 is a schematic top view of a transparent display panel according to an embodiment of the present invention;

FIG. 3 is a diagram of one of the circuits in the area B of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along the direction MM in FIG. 2;

fig. 5 is a schematic structural diagram of a transparent display panel according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of one of the distributions of the area B in FIG. 2;

FIG. 7 is a schematic diagram of one of the distributions of the region B in FIG. 2;

FIG. 8 is a schematic diagram of one of the distributions of the area B in FIG. 2;

FIG. 9 is a schematic diagram of one of the distributions of the region B in FIG. 2;

FIG. 10 is a schematic illustration of one of the transparency effects of an electrochromic device arranged in the manner shown in FIG. 9;

fig. 11 is a diagram illustrating a circuit structure of a transparent display panel according to an embodiment of the present invention;

fig. 12 is a diagram illustrating a circuit structure of a transparent display panel according to an embodiment of the present invention;

FIG. 13 is a schematic cross-sectional view taken along MM in FIG. 2;

FIG. 14 is a timing diagram of one of the circuit configurations shown in FIG. 12;

fig. 15 is a flowchart illustrating a method of driving a transparent display panel according to an embodiment of the present invention;

fig. 16 is a flowchart of one method in step S101 in fig. 15.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the word "comprise" or "comprises", and the like, in the context of this application, is intended to mean that the elements or items listed before that word, in addition to those listed after that word, do not exclude other elements or items.

It should be noted that the sizes and shapes of the various figures in the drawings are not to scale, but are merely intended to illustrate the present disclosure. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

In the related art, in order to ensure the transparency of the transparent display device, the micro LED chip and the pixel circuit of the substrate may be integrated, the opening of the transparent region may be enlarged, and the black film for preventing crosstalk between pixels may be removed. Fig. 1 is a schematic diagram illustrating one of the transparency effects of a transparent display device in the related art, in which an area a1 indicates an area with a picture display, an area a2 indicates an area without a picture display, and spx in fig. 1 indicates a sub-pixel, and the transparency of the light-transmitting area of the entire transparent display device is a fixed value. In this case, since the black film is not provided, crosstalk between pixels affects display. Therefore, the transparency and the display effect of the transparent display device cannot be considered at the same time.

In view of this, embodiments of the present invention provide a transparent display panel, a driving method thereof, and a display apparatus, which are used to improve the display effect of a transparent display device.

Referring to fig. 2 to 4, fig. 2 is a schematic top view of a transparent display panel according to an embodiment of the present invention, fig. 3 is a schematic circuit diagram of a region B in fig. 2, and fig. 4 is a schematic cross-sectional view along a direction indicated by MM in fig. 2.

In an embodiment of the present invention, the transparent display panel includes:

a substrate base plate 10, a plurality of first sub-pixels 20 located in a display area AA of the substrate base plate 10, and second sub-pixels 30 located at gaps of the first sub-pixels 20;

wherein at least some of the plurality of first sub-pixels 20 as target sub-pixels are coupled to the same data signal terminal Vdata as at least one of the second sub-pixels 30, and the color and/or light transmittance of the second sub-pixels 30 is configured to be reversibly changed under the control of the data signal terminal.

As shown in fig. 2, the display area AA of the substrate 10 of the transparent display panel includes a light emitting area a1 and a light transmitting area a2 surrounding the light emitting area a 1. As shown in fig. 3, in the plurality of first sub-pixels 20 located in the display area AA of the substrate 10, each of the first sub-pixels 20 is located in the corresponding light emitting area a1, and the second sub-pixels 30 located at the gaps between the first sub-pixels 20 are located in the light transmitting area a 2. Fig. 2 illustrates one of the first sub-pixel 20 and the second sub-pixel 30, but the present invention is not limited thereto in practical applications.

In a specific implementation, at least a portion of the plurality of first sub-pixels 20 as target sub-pixels and the at least one second sub-pixel 30 are coupled to the same data signal terminal Vdata. In one exemplary embodiment, one of the first sub-pixels 20 and one of the second sub-pixels 30 in the plurality of first sub-pixels 20 may be coupled to the same data signal terminal Vdata, as shown in fig. 3. In one exemplary embodiment, one of the first subpixels 20 in the plurality of first subpixels 20 may be coupled to the same data signal terminal Vdata as the two second subpixels 30. Of course, the coupling condition of the first sub-pixel 20 and the second sub-pixel 30 to the same data signal terminal Vdata may also be set according to the actual application requirement, and is not limited herein.

Also, the color and/or light transmittance of the second subpixel 30 is configured to be reversibly changed under the control of the data signal terminal Vdata. In this way, the second subpixel 30 can exhibit any two states of a transparent state, a black state, and a colored state, and the light transmittance of the second subpixel 30 in the colored state is not less than the light transmittance in the black state and is less than the light transmittance in the transparent state. That is, under the control of the data signal terminal Vdata, the color and/or light transmittance of the corresponding region of the second sub-pixel 30 can be reversibly changed, so that the second sub-pixel 30 can assume the corresponding colored state, thereby changing the light transmittance of the corresponding region of the second sub-pixel 30. In this way, the pixel-level flexible control of the light transmittance is realized, for example, the light transmittance of the area with the picture display is adjusted to be low, and the light transmittance of the area without the picture display is adjusted to be high, so that the display effect of the transparent display panel is improved.

In the embodiment of the present invention, as shown in fig. 5, the second subpixel 30 includes an electrochromic device 301 and a second driving circuit 302, and the first subpixel 20 includes a light emitting device 201 and a first driving circuit 202; in the display area AA, the light emitting devices 201 are arranged in an array, the electrochromic device 301 is disposed around the light emitting device 201 of the target sub-pixel, and an orthographic projection of the electrochromic device 301 on the base substrate 10 and an orthographic projection of the light emitting device 201 on the base substrate 10 do not overlap each other.

Still referring to fig. 5, the second sub-pixel 30 includes an electrochromic device 301 and a second driving circuit 302, and the second driving circuit 302 is used for driving the electrochromic device 301. The first subpixel 20 includes a light emitting device 201 and a first driving circuit 202; in the display area AA, the light emitting devices 201 are arranged in an array, which ensures display uniformity. In addition, the electrochromic device 301 is arranged around the light emitting device 201 of the target sub-pixel, and the orthographic projection of the electrochromic device 301 on the substrate base plate 10 and the orthographic projection of the light emitting device 201 on the substrate base plate 10 are not overlapped with each other, so that the influence of the electrochromic device 301 on the light emitting device 201 is avoided, and the display effect of the transparent display panel is ensured.

In the embodiment of the present invention, the position arrangement between the electrochromic device 301 coupled to the same target sub-pixel and the same data signal terminal Vdata may be implemented in the following two ways, but is not limited to the following two ways.

In a first implementation manner, the electrochromic devices 301 coupled to the same data signal terminal Vdata are independent from each other.

In one exemplary embodiment, fig. 6 is a schematic distribution diagram of the area B in fig. 2, and fig. 6 illustrates that four electrochromic devices 301 coupled to the same data signal terminal Vdata are independent of each other. In one exemplary embodiment, fig. 7 is a schematic diagram of one of the distributions in the area B of fig. 2, and fig. 7 illustrates two independent electrochromic devices 301 coupled to the same data signal terminal Vdata of the same target sub-pixel.

In a second implementation manner, the electrochromic device 301 coupled to the same data signal terminal Vdata with the same target sub-pixel is disposed on the light emitting device 201 side of the target sub-pixel.

In one exemplary embodiment, fig. 8 is a schematic distribution diagram of a region B in fig. 2, and fig. 8 illustrates a case where the electrochromic device 301 coupled to the same data signal terminal Vdata is disposed around the light emitting device 201 of the target sub-pixel in a ring shape.

Of course, in addition to the above-mentioned case of disposing the electrochromic device 301, other cases may be employed to dispose the electrochromic device 301 according to the actual application needs. In one exemplary embodiment, fig. 9 is a schematic view of one of the distributions of the region B in fig. 2, and fig. 9 illustrates one of the cases where the electrochromic devices 301 coupled to the same data signal terminal Vdata with the same target sub-pixel are disposed in "L" around the light emitting device 201 of the target sub-pixel. In particular embodiments, the electrochromic device 301 may be arranged in other ways, which are not described in detail herein. Fig. 10 is a schematic diagram illustrating a transparent effect of the transparent display panel when the electrochromic device 301 is disposed in the manner shown in fig. 9, compared to fig. 1, crosstalk between pixels in a picture area in the display area AA is effectively avoided, and the display effect is ensured.

In one exemplary embodiment, as shown in fig. 11, the second driving circuit 302 includes: a driving transistor M2, a data writing transistor M1, and a storage capacitor Cst; the gate of the data writing transistor M1 is coupled to the Reset control terminal Reset of the target sub-pixel, the first pole is coupled to the data signal terminal Vdata, and the second pole is coupled to the gate of the driving transistor M2;

a first electrode of the driving transistor M2 is coupled to a first power supply terminal VEO, a second electrode is coupled to the first electrode 3011 of the electrochromic device 301, and a second electrode 3012 of the electrochromic device 301 is coupled to a second power supply terminal VSS;

the storage capacitor Cst is coupled between the gate and the second pole of the driving transistor M2.

Still referring to fig. 11, the second driving circuit 302 for driving the electrochromic device 301 includes a driving transistor M2, a data writing transistor M1, and a storage capacitor Cst. In one embodiment, the gate of the data writing transistor M1 is coupled to the Reset control terminal Reset of the target sub-pixel, the first pole is coupled to the data signal terminal Vdata, and the second pole is coupled to the gate of the driving transistor M2. In this way, under the control of the Reset control signal provided by the Reset control terminal Reset, the data writing transistor M1 can write the first data signal provided by the data signal terminal Vdata into the gate of the driving transistor M2, thereby ensuring the driving performance of the driving transistor M2 on the corresponding electrochromic device 301.

In addition, the first electrode of the driving transistor M2 is coupled to the first power supply terminal VEO, the second electrode is coupled to the first electrode 3011 of the electrochromic device 301, and the second electrode 3012 of the electrochromic device 301 is coupled to the second power supply terminal VSS. In one of the exemplary embodiments, the first electrode 3011 may be a positive electrode of the electrochromic device 301, and correspondingly, the second electrode 3012 may be a negative electrode of the electrochromic device 301. In one exemplary embodiment, the voltage value of the voltage signal provided by the first power supply terminal VEO may be changed according to the light intensity of the external environment, so as to adjust the coloring state of the second sub-pixel 30, and accordingly, the light transmittance is changed. The second power source terminal VSS may be a power source terminal supplying a constant low potential, such that when the driving transistor M2 is turned on, the coloring state of the second sub-pixel 30 is adjusted by the difference between the voltage value of the voltage signal supplied from the first power source terminal VEO and the voltage value supplied from the second power source terminal VSS.

In one exemplary embodiment, the first driving circuit 202 may have a 7T1C structure, the first driving circuit 202 may have one of the circuit structures shown in fig. 12, seven transistors including T1 to T7, and a capacitor C, wherein T3 is a transistor for the light emitting device 201, and the specific structural design of the circuit structure may be provided with reference to the related art, and will not be described in detail herein.

In one exemplary embodiment, the orthographic projection of the driving transistor M2 and the data writing transistor M1 on the substrate 10 is not overlapped with the orthographic projection of the light emitting device 201 of the first sub-pixel 20 on the substrate 10 at all, so that the process complexity is simplified, damage to the electrochromic device 301 in the process of manufacturing the light emitting device 201 is avoided, and the use performance of the transparent display panel is improved. Fig. 13 is a schematic view of one of the cross-sectional structures along the MM direction in fig. 2. As for the film layer structures in fig. 13, the buffer layer 101, the gate layer 102, the gate insulating layer 103, the active layer 104, the interlayer insulating layer 105, the source/drain electrode layer 106, the first flat layer 107, the binding electrode 108, the second flat layer 109, and the like may be arranged according to the film layer structures in the related art, which is not described in detail herein.

In the embodiment of the present invention, the orthographic projection of the driving transistor M2 and the data writing transistor M1 on the substrate 10 at least partially overlaps with the orthographic projection of the light emitting device 201 of the first sub-pixel 20 on the substrate 10. In this way, while the coloring state of the electrochromic device 301 is adjusted by the driving transistor M2 and the data writing transistor M1, the aperture ratio of the light-transmitting area a2 is ensured, and the transparency of the corresponding area is also considered.

It should be noted that the first pole and the second pole of each transistor mentioned above may have their functions interchanged according to the corresponding type and the signal at the signal terminal. For example, the first electrode may be a source, and the second electrode may be a drain, and for example, the first electrode may be a drain, and the second electrode may be a source, which is not limited herein. Each Transistor may be a Thin Film Transistor (TFT), a Metal Oxide Semiconductor field effect Transistor (MOS), and all the transistors are P-type transistors or all the transistors are N-type transistors. Of course, the specific type of each transistor can be set according to the actual application requirement, and is not limited herein.

The above is merely to illustrate the specific structure of each driving circuit in the transparent display panel provided in the embodiment of the present invention, and in the implementation, the specific structure of the driving circuit is not limited to the structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, which are within the protection scope of the present invention, and are not limited herein.

In the embodiment of the present invention, the second electrodes 3012 of the electrochromic devices 301 are connected to each other to form an integral structure, that is, the second electrodes 3012 may be disposed on the whole surface. Correspondingly, the first electrodes 3011 of the electrochromic devices 301 may be set independently, and the electrochromic layers 3013 corresponding to the electrochromic devices 301 may also be set independently, and may be prepared by a Fine Metal Mask (FMM) evaporation process. In practical applications, the second electrode 3012 of each electrochromic device 301 may be prepared by a magnetron sputtering (Sputter) process. Of course, each electrochromic device 301 can also be prepared according to the actual application requirement, and will not be described in detail here.

In the embodiment of the present invention, the Light Emitting device 201 is a micro inorganic Light Emitting Diode (micro Light Emitting Diode/Mini Light Emitting Diode) or an Organic Light Emitting Diode (OLED), and the size of each is on the order of hundreds of micrometers or less.

In the embodiment of the present invention, the color and/or light transmittance of the second sub-pixel 30 is configured to be reversibly changed under the control of the data signal terminal Vdata, so that the second sub-pixel can assume any two states of a transparent state, a black state and a colored state, wherein the light transmittance of the colored state is not less than the light transmittance of the black state and is less than the light transmittance of the transparent state. That is, the light transmittance of the second sub-pixel 30 in the colored state is between the light transmittances in the transparent state and the black state. In the specific implementation process, for the same picture to be displayed, the coloring state of the corresponding second sub-pixel 30 can be correspondingly adjusted according to the picture display condition of the corresponding region, so that the display effect of each region is ensured. For example, the same display area AA includes an area D and an area E, where the area D displays a picture, and the coloring state of each second sub-pixel 30 in the area D can be adjusted to be a black state, so as to avoid crosstalk between pixels and ensure the display effect of the area D; the region E does not display any content, and the transparent effect of the region E can be ensured by adjusting the coloring state of each second sub-pixel 30 in the region E to be a transparent state.

The following describes the operation of the transparent display panel according to the embodiment of the present invention with reference to the circuit configuration shown in fig. 12 and the timing chart shown in fig. 14. The potential signal provided by the power terminal VDD is a high level signal, the potential signal provided by the second power terminal VSS is a low level signal, all the transistors are P-type transistors, and each first sub-pixel 20 includes three stages, i.e., a reset stage t1, a write data stage t2, and a light emitting stage t 3. It should be noted that, the embodiments of the present invention are provided for better explaining the present invention, and do not limit the specific implementation of the present invention, wherein "0" represents a low level signal, and "1" represents a high level signal.

A Reset phase t1, Reset being 0, Gate being 1, EM being 1;

in the Reset phase T1, the Reset control signal provided by the Reset control terminal Reset is at a low level, the T1 transistor is turned on, the initialization signal provided by the initialization signal terminal Vinit is provided to the gate of the T3 transistor, and the gate of the T3 transistor is initialized; also, the Data writing transistor M1 is turned on, and at this time, by applying a first Data signal Data of a negative potential, for example, -10V, to the Data signal terminal Vdata, the potential signal Data can be written to the storage capacitor Cst in advance. The scan control signal provided by the scan control terminal Gate is high, and the transistor T2, the transistor T4, and the transistor T7 are all turned off. The emission control signal supplied from the emission control terminal EM is high, and both the transistor T5 and the transistor T6 are turned off.

A data writing phase t2, Reset being 1, Gate being 0, EM being 1;

in the data writing phase T2, the Reset control signal provided by the Reset control terminal Reset is at a high level, and both the T1 transistor and the data writing transistor M1 are turned off. The emission control signal supplied from the emission control terminal EM is high, and both the transistor T5 and the transistor T6 are turned off. The scan control signal provided by the scan control terminal Gate is at a low level, the transistor T2, the transistor T4 and the transistor T7 are all turned on, and the threshold voltage of the transistor T3 and the second data signal provided by the data signal terminal Vdata can be written into the capacitor C, so that the subsequent transistor T3 stably outputs a driving current while the capacitor C maintains the voltage of the written signal, thereby controlling the light emitting device 201 to emit light.

A light-emitting period t3, Reset being 1, Gate being 1, EM being 0;

in the light-emitting period T3, the Reset control signal provided by the Reset control terminal Reset is at a high level, and both the T1 transistor and the data write transistor M1 are turned off. The scan control signal provided by the scan control terminal Gate is high, and the transistor T2, the transistor T4, and the transistor T7 are all turned off. The emission control signal provided by the emission control terminal EM is low, and both the transistor T5 and the transistor T6 are turned on. The T3 transistor stably outputs a driving current with the voltage of the written signal maintained by the capacitor C, thereby controlling the light emitting device 201 to emit light. Meanwhile, when the driving transistor M2 is turned on, the voltage signal provided by the first power terminal VEO can be stably written into the anode of the electrochromic device 301 under the action of the storage capacitor Cst, and the second power terminal VSS is coupled to the cathode of the electrochromic device 301, so that the coloring state of the corresponding electrochromic device 301 is adjusted under the action of the voltages provided by the first power terminal VEO and the second power terminal VSS, thereby changing the light transmittance of the corresponding region.

It should be noted that the reset phase t1 of the first sub-pixel 20 includes a first sub-phase t11 for resetting the gate of the driving transistor M2 of the second sub-pixel 30, and a second sub-phase t12 for writing the voltage to the gate of the driving transistor M2 of the second sub-pixel 30. In the first sub-phase t11, the Reset signal V1 is written through the data signal terminal Vdata, and the value of the Reset signal V1 can be set to the voltage value of the initialization signal provided by the initialization signal terminal Vinit, wherein the Reset signal V1 is larger than the voltage value of the Reset control signal provided by the Reset control terminal Reset in the Reset phase t 1. In this way, before data writing is performed on the second sub-pixel 30, resetting of the second sub-pixel 30 is realized, and the accuracy of data writing of the subsequent electronic color-changing sub-pixel 30 is ensured. In the second sub-phase t12, the first data signal is written into the Gate of the driving transistor M2 through the data signal terminal Vdata, wherein the voltage value of the first data signal is substantially equal to the voltage value of the scan control signal provided by the scan control terminal Gate in the data writing phase t2, so that the first data signal is written into the Gate of the driving transistor M2. In addition, the reset signal V1, the first data signal, and the second data signal written into the first subpixel 20 are all input in a time-sharing manner through the same data signal terminal Vdata, so that the light emitting function of the first subpixel 20 and the color state adjusting function of the second subpixel 30 are both considered.

Based on the same inventive concept, an embodiment of the present invention further provides a display device, including:

the embodiment of the invention provides any one of the transparent display panels.

Since the principle of the display device to solve the problem is similar to the aforementioned one transparent display panel. Therefore, the implementation of the display device can be referred to the implementation of the transparent display panel, and repeated details are not repeated.

In a specific implementation process, the display device provided by the embodiment of the invention may be a vehicle-mounted skylight or a vehicle-mounted mirror, which is not limited herein.

Based on the same inventive concept, an embodiment of the present invention provides a method for driving the transparent display panel, as shown in fig. 15, including:

s101: in a reset phase of the target sub-pixel, providing a first data signal to the data signal terminal so that the second sub-pixel is driven by the first data signal to adjust a coloring state;

s102: and in the light-emitting stage of the target sub-pixel, providing a second data signal to the data signal terminal so that the target sub-pixel emits light under the driving of the second data signal.

For the specific implementation process of step S101 to step S102, reference may be made to the description of the relevant parts in the foregoing transparent display panel, which is not described herein again.

In the embodiment of the present invention, as shown in fig. 16, the reset phase of the target sub-pixel includes a first sub-phase and a second sub-phase, and step S101: in a reset phase of the target subpixel, providing a first data signal to the data signal terminal, including:

s201: in the first sub-stage, a reset signal is provided for the data signal end, and the second sub-pixel is reset;

s202: and in the second sub-phase, providing the first data signal to the data signal terminal, wherein the voltage value of the first data signal is smaller than that of the reset signal.

For the specific implementation process of step S201 to step S202, reference may be made to the description of the relevant part in the transparent display panel, which is not described herein again.

In an embodiment of the present invention, the second sub-pixel comprises an electrochromic device and a second driving circuit, the first electrode of the driving transistor in the second driving circuit is coupled to the first power terminal, and the method further comprises:

In the specific implementation process, the voltage value of the voltage signal applied to the first power supply terminal VEO can be adjusted according to the external light intensity change, so that the coloring state of the second sub-pixel 30 is adaptively adjusted, and the adaptive adjustment of the light transmittance is realized. For example, the stronger the external light intensity is, the larger the voltage value of the voltage signal loaded to the first power supply terminal VEO is, and accordingly, the lower the light transmittance of the region with the picture display is, thereby ensuring the display effect of the region with the picture display.

The embodiment of the invention provides a transparent display panel, a driving method thereof and a display device, wherein the transparent display panel comprises a substrate base plate 10, a plurality of first sub-pixels 20 positioned in a display area AA of the substrate base plate 10 and second sub-pixels 30 positioned at the gaps of the first sub-pixels 20; at least a portion of the first sub-pixels 20 as target sub-pixels are coupled to the same data signal terminal Vdata as the at least one second sub-pixel 30, for example, the sub-pixels a of the first sub-pixels 20 and the sub-pixels b of the at least one second sub-pixels are coupled to the data signal terminal Vdata; wherein the color and/or light transmittance of the second sub-pixel 30 is configured to be reversibly changed under the control of the data signal terminal Vdata. That is, under the control of the data signal terminal Vdata, the color and/or light transmittance of the corresponding region of the second sub-pixel 30 can be reversibly changed, so that the second sub-pixel 30 can assume the corresponding colored state, thereby changing the light transmittance of the corresponding region of the second sub-pixel 30. In this way, the pixel-level flexible control of the light transmittance is realized, for example, the light transmittance of the area with picture display is adjusted to be low, and the light transmittance of the area without picture display is adjusted to be high, so that the display effect of the transparent display device is improved.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A transparent display panel, comprising:

2. The transparent display panel of claim 1, wherein the first subpixel comprises a light emitting device and a first driving circuit, and the second subpixel comprises an electrochromic device and a second driving circuit; in the display area, the light emitting devices are arranged in an array mode, the electrochromic device is arranged around the light emitting device of the target sub-pixel, and the orthographic projection of the electrochromic device on the substrate base plate and the orthographic projection of the light emitting device on the substrate base plate are not overlapped.

3. The transparent display panel of claim 2, wherein the electrochromic devices coupled to the same data signal terminal with the same target sub-pixel are independent from each other.

4. The transparent display panel of claim 2, wherein the electrochromic device coupled to the same data signal terminal as the same target sub-pixel is disposed at a light emitting device side of the target sub-pixel.

5. The transparent display panel of any one of claims 2-4, wherein the second drive circuit comprises: a drive transistor, a data write transistor and a storage capacitor;

6. The transparent display panel of claim 5, wherein an orthographic projection of the driving transistor and the data writing transistor on the substrate base plate at least partially overlaps with an orthographic projection of the light emitting device of the first sub-pixel on the substrate base plate.

7. The transparent display panel of claim 5, wherein the second electrodes of the electrochromic devices are connected to each other to form an integral structure.

8. The transparent display panel of claim 7, wherein the light emitting device is a micro inorganic light emitting diode or an organic light emitting diode.

9. The transparent display panel according to claim 1, wherein the color and/or light transmittance of the second sub-pixel is configured to be reversibly changed under the control of the data signal terminal so that the second sub-pixel can assume any two states of a transparent state, a black state and a colored state, wherein the light transmittance of the colored state is not less than the light transmittance in the black state and is less than the light transmittance in the transparent state.

10. A display device, comprising:

the transparent display panel of any one of claims 1-9.

11. A method of driving the transparent display panel according to any one of claims 1 to 9, comprising:

12. The method of claim 11, wherein the reset phase of the target sub-pixel comprises a first sub-phase and a second sub-phase, and wherein providing the first data signal to the data signal terminal during the reset phase of the target sub-pixel comprises:

13. The method of claim 11, wherein the second subpixel comprises an electrochromic device and a second driving circuit in which a first electrode of a driving transistor is coupled to a first power supply terminal, the method further comprising: