CN110850616A - Display device - Google Patents

Abstract

The invention discloses a display device, which belongs to the technical field of display and comprises a transparent display panel, a power supply module and a solar charging panel, wherein the solar charging panel is positioned on one side of the transparent display panel; the power module is electrically connected with the transparent display panel, and the solar charging panel is electrically connected with the power module; the first charging unit and the second charging unit of the solar charging panel are electrically connected in series, and the orthographic projection of the charging unit to the transparent display panel is positioned in the range of the display area; each charging unit comprises a first electrode and a second electrode which are oppositely arranged, and a PN junction is arranged between the first electrode and the second electrode. According to the invention, the solar charging panel is integrated under the transparent display panel in a film forming mode, so that the display device can generate electricity automatically, and the boosting effect is realized through the charging unit structure connected in series in the solar charging panel, thus the solar energy display panel has higher light energy utilization efficiency.

Description

display device

technical field

The present invention relates to the field of display technology, and more particularly, to a display device.

Background technique

In today's society, portable devices with displays have brought a lot of fun to everyone, but portable devices with displays are usually small in size, resulting in the size of the battery is not large, and the capacity of the battery is small, which is not enough to support the The long-term use of the portable device with the display requires people to frequently charge the portable device with the display, or carry the mobile charging device while carrying the portable device with the display, which causes great inconvenience to everyone's travel.

With the development of society, solar energy technology has been increasingly utilized. Solar technology refers to technologies capable of converting sunlight into electricity, which can then be used to power various electronic devices. Solar energy is an inexhaustible and harmless energy source, and harnessing it has many benefits. For example, solar energy can be used to generate electricity without creating pollution such as air pollution, noise pollution or greenhouse gases. As a result, the technology of combining the display with solar energy came into being, mainly through the solar cell to absorb the light source and convert it into electrical energy to power the display. In the prior art, most of the researchers are devoted to the research of transparent solar power generation devices, but transparent solar power generation devices only absorb ultraviolet or infrared light, and the photoelectric conversion efficiency is relatively low; and because common solar power generation devices are completely opaque, they cannot be applied to common on the display device.

Therefore, how to better combine solar energy technology with display technology to provide a self-generating device that has the ability to absorb solar energy and convert it into electrical energy, and can have a relatively ideal photoelectric conversion efficiency, thereby achieving lower power consumption and higher energy consumption. A display device with an environmentally friendly structure is a technical problem to be solved urgently by those skilled in the art.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a display device to solve the problems in the prior art that the mutual influence of the solar energy technology and the display technology cannot be well combined, and the photoelectric conversion efficiency is low.

The display device provided by the present invention includes a transparent display panel, a power supply module, and a solar charging panel, wherein the solar charging panel is located on one side of the transparent display panel; the power supply module is electrically connected to the transparent display panel, and the solar charging panel is electrically connected to the power supply module; the transparent display The panel includes a display area and a non-display area arranged around the display area, the solar charging panel includes at least two charging units, which are respectively a first charging unit and a second charging unit, and the first charging unit and the second charging unit are electrically connected in series, The orthographic projection of the charging unit to the transparent display panel is located within the range of the display area; along the direction perpendicular to the light-emitting surface of the transparent display panel, each charging unit includes a first electrode and a second electrode that are oppositely arranged, and the first electrode and the second electrode are oppositely arranged. There is a PN junction between them; the first electrode is located on the side of the second electrode close to the transparent display panel, the first electrode is electrically connected to one pole of the power module through the first metal wire, and the second electrode is connected to the power module through the second metal wire. The other pole is electrically connected; the orthographic projections of the first metal wire and the second metal wire to the transparent display panel are both located within the non-display area.

Compared with the prior art, the display device provided by the present invention achieves at least the following beneficial effects:

The invention combines the transparent display panel with the solar charging panel, integrates the solar charging panel under the transparent display panel by means of film formation, and realizes the boosting effect through the series-connected charging unit structure inside the solar charging panel. The transparent display panel can have two states of display and non-display. In the non-display state, the entire transparent display panel is in a transparent state, and all light can pass through the transparent display panel for the solar charging panel to absorb, and convert the light energy into electrical energy. Charge the power module; in the display state, only the display area is opaque or flocculent white, and the other non-display areas are still transparent, which are still used for the transmission of light for the solar charging panel to absorb, and continue to transmit light energy. Converted into electrical energy to continuously charge the power module. The present invention has higher light energy utilization efficiency, enables the display device to effectively combine the solar energy technology with the display technology, utilizes the solar charging panel to effectively utilize the light energy and converts it into electrical energy, enables the display device to generate electricity by itself, and the solar energy technology has no danger of exhaustion. Safe and reliable, no noise, no pollution, no pollution, no geographical restrictions, high energy quality, which is conducive to saving power consumption, and the solar charging panel does not affect the display effect, which can make the transparent display more widely used. The solar charging panel has a built-in series-connected charging unit, which can further boost the voltage and achieve ideal photoelectric conversion efficiency.

Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time.

Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

1 is a schematic plan view of a display device according to an embodiment of the present invention;

2 is a block diagram of an electrical connection structure of the display device of FIG. 1;

Fig. 3 is A-A ' in Fig. 1 to sectional structure schematic diagram;

Fig. 4 is A-A' in Fig. 1 to another kind of sectional structure schematic diagram;

5 is a schematic cross-sectional structure diagram of a charging unit;

6 is a schematic diagram of the principle structure of a charging unit;

Figure 7 is a schematic diagram of the PN junction plus forward voltage;

Figure 8 is a schematic diagram of a PN junction with reverse voltage applied;

9 is another schematic cross-sectional structure diagram of the charging unit;

10 is a schematic cross-sectional structural diagram of three charging units electrically connected in series in this embodiment;

11 is a schematic plan view of another display device according to an embodiment of the present invention;

12 is a schematic plan view of another display device according to an embodiment of the present invention;

13 is a block diagram of an electrical connection structure of the display device of FIG. 12;

14 is a schematic plan view of another display device according to an embodiment of the present invention;

FIG. 15 is a block diagram of another electrical connection structure of the display device of FIG. 1 .

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

Please refer to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 . FIG. 1 is a schematic plan view of a display device according to an embodiment of the present invention, FIG. 2 is a block diagram of an electrical connection structure of the display device of FIG. 1 , and FIG. 3 is a 1 is a schematic diagram of a cross-sectional structure along the AA' direction, and FIG. 4 is a schematic diagram of another cross-sectional structure along the AA' direction in FIG. 1. A display device 000 provided in this embodiment includes: a transparent display panel 10 (in FIG. 1 ). not filled), power module 20 (not shown in FIG. 1 ), solar charging panel 30 (not filled in FIG. 1 ), the solar charging panel 30 is located on one side of the transparent display panel 10 ; specifically, the solar charging panel 30 is located on the transparent display panel 30 One side of the panel 10 is located on the side away from the light-emitting surface E of the transparent display panel 10; optionally, the power module 20 may be a rechargeable battery;

The power module 20 is electrically connected to the transparent display panel 10, and the solar charging panel 30 is electrically connected to the power module 20;

The transparent display panel 10 includes a display area AA and a non-display area NA arranged around the display area AA. The solar charging panel 30 includes at least two charging units 300, which are a first charging unit 301 and a second charging unit 302 respectively. The unit 301 and the second charging unit 302 are electrically connected in series, and the orthographic projection of the charging unit 300 to the transparent display panel 10 is located within the display area AA;

Along the direction Z perpendicular to the light-emitting surface E of the transparent display panel 10, each charging unit 300 includes a first electrode 3001 and a second electrode 3002 arranged oppositely, and a PN junction 3003 is arranged between the first electrode 3001 and the second electrode 3002;

The first electrode 3001 is located on the side of the second electrode 3002 close to the transparent display panel 10 . The first electrode 3001 is electrically connected to one pole of the power module 20 through the first metal wire 41 , and the second electrode 3002 is connected to the power supply through the second metal wire 42 . The other pole of the module 20 is electrically connected;

The orthographic projections of the first metal wire 41 and the second metal wire 42 to the transparent display panel 10 are both located within the range of the non-display area NA.

Specifically, the display device 000 of this embodiment includes a transparent display panel 10 , a power module 20 , and a solar charging panel 30 . The solar charging panel 30 is located on one side of the transparent display panel 10 and is located at a distance away from the light-emitting surface E of the transparent display panel 10 . The power module 20 is electrically connected to the transparent display panel 10, and the solar charging panel 30 is electrically connected to the power module 20. The solar charging panel 30 can absorb the light passing through the transparent display panel 10 and convert the light energy into electrical energy, which is then used for Charge the power supply module 20; the power supply module 20 stores the electric energy integrated by the solar charging panel 30 to provide power for the transparent display panel 10; that is, the solar charging panel 30 is used to charge the power supply module 20, and the transparent display panel 10 is supplied by the power supply module 20 to the power supply module 20. For power supply, there is no direct power supply relationship between the transparent display panel 10 and the solar charging panel 30, so that electricity can be stored in time when the light is sufficient for the transparent display panel 10 to use at any time, with high flexibility. Optionally, the power supply module 20 may be disposed on the transparent display panel 10 and the solar charging panel 30, and may also be integrated with any one of the transparent display panel 10 and the solar charging panel 30, which is not specifically limited in this embodiment, and only needs to be satisfied. The power module 20 is respectively electrically connected to the transparent display panel 10 and the solar charging panel 30 to achieve the effects of storing the electric energy integrated by the solar charging panel 30 and providing power for the transparent display panel 10 .

Generally, liquid crystal display devices in the prior art utilize the optical anisotropy and birefringence properties of liquid crystal molecules to display images, and generally need to provide polarizers, alignment layers, and the like therein. However, such polarizers, alignment layers, etc. tend to cause relatively serious optical losses, shading, and the like. To this end, this embodiment exemplarily proposes a transparent display panel using a PDLC (Polymer Dispersed Liquid Crystal) layer as the liquid crystal layer, and optionally, a PNLC (Polymer Network Liquid Crystal) layer as the liquid crystal layer. The transparent display panel using the PDLC layer as the liquid crystal layer, by mixing the small molecule liquid crystal and the prepolymer with each other, and under certain conditions, the micron-sized liquid crystal droplets are formed by the polymerization reaction and uniformly dispersed in the polymer network, Thus, a PDLC layer is formed. The PDLC layer realizes electro-optical response characteristics by virtue of the dielectric anisotropy of liquid crystal molecules. The PDLC layer mainly works between the light scattering state and the transparent state, and is roughly divided into two types: forward PDLC and reverse PDLC. For the forward PDLC layer, a light scattering state is present when energized, and a transparent state is present when de-energized. Conversely, for the reverse PDLC layer, the situation is reversed, that is, a transparent state is present when energized, and a light scattering state is present when de-energized. Since the transparent display device does not need polarizers, alignment layers, etc., is easier to manufacture and has higher light utilization, it has received more and more attention and is widely used in various fields.

Optionally, as shown in FIG. 4 , the transparent display panel 10 of this embodiment may include a first transparent substrate 101 and a second transparent substrate 102 disposed opposite to each other, and sandwiched between the first transparent substrate 101 and the second transparent substrate The liquid crystal layer 103 between 102, the liquid crystal layer 103 includes polymer dispersed liquid crystal; the first transparent conductive layer 104 is provided on the surface of the first transparent substrate 101 facing the liquid crystal layer 103, and the second transparent substrate 102 on the surface facing the liquid crystal layer 103 A second transparent conductive layer 105 is provided, and the transparent display panel 10 can display different grayscale images without a polarizer. The transparent display panel 10 does not include polarizers and color resists, which can improve the transparency compared to the prior art. Transmittance of the display panel 10 . The liquid crystal layer 103 of the transparent display panel 10 includes a polymer dispersed liquid crystal or a polymer network liquid crystal, that is, a PDLC layer or a PNLC layer. In vivo, since the optical axes of droplets composed of liquid crystal molecules are in a free orientation, their refractive indices do not match that of the matrix. The liquid crystals in polymer network liquid crystals are not spherical (or ellipsoidal) droplets, but are distributed in a three-dimensional network of polymers, forming a continuous network of channels.

Optionally, either one of the first transparent conductive layer 104 and the second transparent conductive layer 105 is a plurality of conductive blocks of a block structure arranged in an array, and the other is a layered structure, or the first transparent conductive layer 104 and the second transparent conductive layer 105 are conductive blocks of a block-like structure arranged in a plurality of arrays. Optionally, the first transparent substrate 101 may include a plurality of pixels (not shown in the figure) arranged in an array. The pixel includes a pixel electrode (ie, a block-shaped conductive block), and the second transparent substrate 102 includes a common electrode layer connected to a common potential (ie, the second transparent conductive layer 105 is a common electrode layer connected to a common potential). When the liquid crystal layer 103 is a PDLC layer, and no voltage is applied to the first transparent conductive layer 104 and the second transparent conductive layer 105 , that is, the transparent display panel 10 has no applied voltage, the first transparent substrate 101 and the second transparent substrate 102 A regular electric field cannot be formed between them, the optical axis of the polymer-dispersed liquid crystal particles is randomly oriented, showing a disordered state, and its effective refractive index does not match the refractive index of the polymer, and the transparent display panel 10 is in an opaque state or a semi-transparent state or Blurred (flocculent) whitened state; and when a voltage is applied to the first transparent conductive layer 104 and the second transparent conductive layer 105 , that is, the transparent display panel 10 is under an applied voltage, the first transparent substrate 101 and the second transparent substrate A regular electric field is formed between 102 for adjusting the optical axis orientation of the polymer dispersed liquid crystal particles, the refractive index of the liquid crystal molecules matches the refractive index of the matrix, and the transparent display panel 10 is in a transparent state. The electric field formed between the first transparent conductive layer 104 and the second transparent conductive layer 105 in this embodiment can adjust the optical axis orientation of the polymer dispersed liquid crystal particles. The transparent display panel 10 is in a transparent state, and when the electric field is removed, the polymer-dispersed liquid crystal particles return to the original disordered state, thereby displaying.

Therefore, taking the liquid crystal layer 103 as the PDLC layer as an example, the transparent display panel 10 of this embodiment can control the conduction of part of the conductive blocks of the block structure through the external driving circuit, and the remaining conductive blocks of the block structure are not energized, thereby realizing the transparent display panel. 10 is displayed and not displayed, the area corresponding to the non-energized conductive block is in a flocculent white display state, and the area corresponding to the energized conductive block is still in a transparent state, which is used for the transmission of light for the solar charging panel 30 to absorb, and continue to Converting light energy into electric energy has higher utilization efficiency of light energy, which is beneficial to enable the display device of this embodiment to effectively combine solar energy technology and display technology, and use the solar charging panel 30 to effectively utilize light energy and convert it into electric energy, so that the display can be effectively used. The device 000 can generate electricity by itself, which is beneficial to saving power consumption, and the solar charging panel 30 does not affect the display effect, which can make the application range of the transparent display wider.

It should be noted that the transparent display panel in this embodiment can be either a PDLC panel or a PNLC panel. The above embodiment is described by taking the liquid crystal layer 103 as a PDLC layer as an example, and the liquid crystals in the PNLC layer and the PDLC layer are only liquid crystals. There are differences in structural properties. The principle of transparent display is the same as the display principle in which the liquid crystal layer 103 is a PDLC layer. Both are in a non-transparent state when no voltage is applied, and become transparent when a voltage is applied.

When the liquid crystal layer 103 is a PDLC layer, the arrangement of the liquid crystal particles inside the PDLC panel can be controlled by an applied voltage, so as to realize the adjustment of the transparency of the panel. When no external voltage is applied, the liquid crystal particles in the PDLC panel are in a disordered state. , at this time, the panel is in an opaque state or a translucent state or a fuzzy (flocculent) whitening state; when an external voltage is applied to the PDLC panel, the liquid crystal particles in the PDLC panel form a substantially uniform medium, and the refractive index of the liquid crystal molecules and the refraction of the matrix The ratio is matched, so that the incident light will not be scattered, and the panel is transparent at this time.

When the liquid crystal layer 103 is a PNLC layer, the arrangement of the liquid crystal channel network inside the PNLC panel can be controlled by an applied voltage, so as to realize the adjustment of the transparency of the panel. When no external voltage is applied, the liquid crystal channel network in the PNLC panel is free At this time, the panel is in an opaque state or a translucent state or a fuzzy (flocculent) whitening state; when an external voltage is applied to the PNLC panel, the liquid crystal channel network in the PNLC panel forms a substantially uniform medium, resulting in the incident light not Scattering occurs, and the panel is now transparent. In specific implementation, it can be selected according to actual needs.

In addition, the solar charging panel 30 of the present embodiment includes at least two charging units 300, and the orthographic projection of the charging units 300 to the transparent display panel 10 is located within the display area AA, so that as many charging units 300 can be installed as possible, which is conducive to full utilization The solar technology increases the layout area for realizing the photoelectric conversion structure, and increases the effective area of the solar charging panel 30 . The at least two charging units 300 are respectively a first charging unit 301 and a second charging unit 302. The first charging unit 301 and the second charging unit 302 are electrically connected in series. The solar charging panel 30 has a built-in charging unit 300 in series. The voltage generated by 30 is determined by the built-in electric field of the PN junction 3003 of the charging unit 300 (that is, determined by the PN junction doping concentration), and has nothing to do with the size of the solar charging panel 30. Increasing the area only increases the output power (current), so Connecting a plurality of charging units 300 in series can play a boosting effect like ordinary batteries in series, and can achieve a relatively ideal photoelectric conversion efficiency. It should be noted that this embodiment only describes the series electrical connection relationship between the first charging unit 301 and the second charging unit 302. During specific implementation, the structure for realizing the series electrical connection in the solar charging panel 30 can be diversified. This embodiment It is not limited, as long as the first charging unit 301 and the second charging unit 302 can be connected in series to achieve the boosting effect.

Optionally, as shown in FIG. 5 , which is a schematic cross-sectional structure diagram of the charging unit 300 , along the direction Z perpendicular to the light-emitting surface E of the transparent display panel 10 , each charging unit 300 includes a first electrode 3001 and a first electrode 3001 and a first electrode 3001 disposed opposite to each other. Two electrodes 3002, a PN junction 3003 is arranged between the first electrode 3001 and the second electrode 3002. Each charging unit 300 in this embodiment utilizes the working principle of a solar cell, specifically, the photovoltaic effect of the semiconductor PN junction 3003. The PN junction 3003 is formed by using different doping processes. Through diffusion, the P-type semiconductor and the N-type semiconductor are fabricated on the same semiconductor (usually silicon or germanium) substrate, and a space charge region is formed at their interface. Called PN junction (PN junction). The PN junction has unidirectional conductivity, which is a characteristic utilized by many devices in electronic technology, such as the material basis of semiconductor diodes and bipolar transistors. The so-called photovoltaic effect is that when an object is illuminated, the state of charge distribution in the object changes to generate electromotive force and current. As shown in FIG. 6 , which is a schematic diagram of the principle structure of the charging unit 300 , when sunlight or other light illuminates the PN junction 3003 of the semiconductor, a voltage will appear on both sides of the PN junction 3003 , which is called photogenerated voltage. When light is irradiated on the PN junction 3003, electron-hole pairs are generated, and the carriers generated near the PN junction 3003 inside the semiconductor are not recombined and reach the space charge region (depletion region), and are attracted by the internal electric field. When the holes flow into the N region, the holes flow into the P region. As a result, the N region stores excess electrons and the P region has excess holes. They form a photo-generated electric field in the vicinity of the PN junction 3003 opposite to the direction of the potential barrier. In addition to partially offsetting the effect of the barrier electric field, the photoelectric field also makes the P region positively charged and the N region negatively charged, and an electromotive force is generated in the thin layer between the N region and the P region, which is the photovoltaic effect. The sunlight irradiates on the PN junction 3003 to form a new hole-electron pair. Under the action of the built-in electric field of the PN junction 3003, the holes flow from the N region to the P region, and the electrons flow from the P region to the N region, and the electrical path is connected to generate a current.

Optionally, the working principle of the PN junction 3003 is shown in Figures 7 and 8. Figure 7 is a schematic diagram of the PN junction with forward voltage, and Figure 8 is a schematic diagram of the PN junction with reverse voltage. The forward voltage, that is, the P region is connected to the positive electrode, and the N region is connected to the negative electrode. As shown in Figure 7, since the direction of the electric field of the applied voltage is opposite to the direction of the electric field in the PN junction, under the action of the external electric field, the internal electric field will be weakened, making the power consumption. The exhaust area is narrowed, and the diffusion movement is enhanced, so that the majority carriers will continuously pass through the PN junction driven by the external electric field force, forming a large diffusion current, which is called forward current. It can be seen that when the PN junction is conducting forward, its resistance is very small. When the reverse voltage is applied, the depletion region of the PN junction becomes wider, and the reverse current is very small; if the reverse voltage is applied to the PN junction, as shown in Figure 8, the P region is connected to the negative electrode, and the N region is connected to the positive electrode. At this time, due to the applied electric field The direction of the internal electric field is consistent with the internal electric field, the internal electric field is strengthened, the diffusion motion of the majority carriers is weakened, no forward current passes through the PN junction, and only the drift motion of the minority carriers forms a reverse current. , so the reverse current is very weak, therefore, under the reverse voltage of the PN junction, its resistance is very large. It can be seen from the above analysis that the PN junction can conduct electricity when it passes the forward voltage, which is often called conduction; while it does not conduct electricity when the reverse voltage is applied, which is often called cut-off, that is, the PN junction has unidirectional conductivity.

The first electrode 3001 of the charging unit 300 in this embodiment is located on the side of the second electrode 3002 close to the transparent display panel 10 , and the first electrode 3001 is connected to one electrode of the power module 20 (which may be a rechargeable battery) through the first metal wire 41 . connection, the second electrode 3002 is electrically connected to the other pole of the power module 20 (which can be a rechargeable battery) through the second metal wire 42 , the first metal wire 41 and the second metal wire 42 are used to connect the charging unit 300 to the power module 20 Electrical connection, when the solar charging panel 30 converts solar energy into electrical energy, the electrical energy is transmitted to the power module 20 for charging. The orthographic projections of the first metal wire 41 and the second metal wire 42 to the transparent display panel 10 are both located within the range of the non-display area NA, so that the arrangement of the first metal wire 41 and the second metal wire 42 can be avoided from occupying the layout of the charging unit 300 space, which is beneficial to further improve the effective area of the solar charging panel 30 .

In this embodiment, the transparent display panel 10 is combined with the solar charging panel 30 , the solar charging panel 30 is integrated under the transparent display panel 10 by means of film formation, and the boosting effect is achieved through the structure of the charging unit 300 connected in series inside the solar charging panel 30 ; Optionally, the transparent display panel 10 and the solar charging panel 30 can be fixed by double-sided tape or sealant. The transparent display panel 10 can have two states of display and non-display. In the non-display state, the entire transparent display panel 10 is in a transparent state, and all light can pass through the transparent display panel 10 for the solar charging panel 30 to absorb, and the light energy Converted into electrical energy to charge the power module 20; and in the display state, only the display area is in an opaque state or a flocculent whitening state, and the other non-display areas are still in a transparent state, which is still used for the transmission of light for the solar charging panel 30. Absorb, continue to convert light energy into electrical energy, and continue to charge the power module 20. For example, under normal circumstances, the transparent display panel 10 is transparent glass. When displaying numbers, only the part displaying numbers becomes opaque or flocculent white, and other parts remain transparent. The signal traces in the transparent display panel 10 can all be transparent traces, and their own structures are all in a transparent state, so it is highly feasible to combine the solar charging panel 30 for simultaneous display and photoelectric conversion. This embodiment has higher light energy utilization efficiency, and enables the display device to effectively combine the solar energy technology with the display technology, and uses the solar charging panel 30 to effectively convert the light energy into electrical energy, so that the display device 000 can generate electricity by itself. Dangerous depletion, safe and reliable, no noise, no pollution, no pollution, no geographical restrictions, high energy quality, which is conducive to saving power consumption, and the solar charging panel 30 does not affect the display effect, which can make the application range of transparent display more widely. In addition, the solar charging panel 30 has a built-in charging unit 300 connected in series, which can further boost the voltage and achieve an ideal photoelectric conversion efficiency.

In some optional embodiments, please continue to refer to FIG. 1 , FIG. 3 to FIG. 5 and FIG. 9 . FIG. 9 is another schematic cross-sectional structure diagram of the charging unit 300 . In this embodiment, light is emitted along the direction perpendicular to the transparent display panel 10 . In the direction Z of the plane E, the PN junction 3003 includes a stacked P-type semiconductor 30031 and an N-type semiconductor 30032;

The first electrode 3001 is the positive electrode, the second electrode 3002 is the negative electrode, the P-type semiconductor 30031 is located on the side of the first electrode 3001 close to the second electrode 3002, and the N-type semiconductor 30032 is located on the side of the P-type semiconductor 30031 close to the second electrode 3002 ( Figure 5);

Alternatively, the first electrode 3001 is a negative electrode, the second electrode 3002 is a positive electrode, the N-type semiconductor 30032 is located on the side of the first electrode 3001 close to the second electrode 3002 , and the P-type semiconductor 30031 is located on a side of the N-type semiconductor 30032 close to the second electrode 3002 side.

This embodiment further explains that the P-type semiconductor 30031 and the N-type semiconductor 30032 stacked in the PN junction 3003 can be arranged interchangeably, but the side close to the P-type semiconductor 30031 is the positive electrode of the charging unit 300, as shown in the figure 5, when the P-type semiconductor 30031 is located on the side of the first electrode 3001 close to the second electrode 3002, and the N-type semiconductor 30032 is located on the side of the P-type semiconductor 30031 close to the second electrode 3002, the first electrode 3001 of the charging unit 300 is The positive electrode, the second electrode 3002 is the negative electrode; and as shown in FIG. When the charging unit 300 is on the side, the first electrode 3001 of the charging unit 300 is a negative electrode, and the second electrode 3002 is a positive electrode. During specific implementation, it can be flexibly set according to actual needs.

In some optional embodiments, please continue to refer to FIG. 1 to FIG. 4 , in this embodiment, the first electrode 3001 of the first charging unit 301 and the second electrode 3002 of the second charging unit 302 are electrically connected through the connecting portion 3004 ;

In the direction X parallel to the light-emitting surface E of the transparent display panel 10, a first insulating portion 3005 is provided between the connecting portion 3004 and the PN junction 3003 of the first charging unit 301 and the second electrode 3002, and the connecting portion 3004 is connected to the second charging unit 3001. A second insulating portion 3006 is provided between the first electrode 3001 of the unit 302 and the PN junction 3003;

The first electrode 3001 of the second charging unit 302 is electrically connected to one electrode of the power module 20 through a first metal wire 41 ; the second electrode 3002 of the first charging unit 301 is electrically connected to another electrode of the power module 20 through a second metal wire 42 One pole is electrically connected.

This embodiment further explains an optional structure in which at least two charging units 300 are electrically connected in series in the solar charging panel 30 , the first electrode 3001 of the first charging unit 301 and the second electrode 300 of the second charging unit 302 The electrode 3002 is electrically connected through the connecting portion 3004, the first electrode 3001 of the second charging unit 302 is electrically connected to one electrode of the power module 20 through a first metal wire 41; the second electrode 3002 of the first charging unit 301 is electrically connected through a second The metal wire 42 is electrically connected to the other pole of the power module 20 , that is, the first electrode 3001 (positive or negative) of the previous charging unit 300 is connected to the second electrode 3002 (negative or positive) of the latter charging unit 300 . The first electrode 3001 of the latter charging unit 300 is electrically connected to one electrode of the power module 20 through a first metal wire 41 , and the second electrode 3002 of the former charging unit 300 is electrically connected to the other electrode of the power module 20 through a second metal wire 42 . One pole is electrically connected, so as to realize that at least two charging units 300 play a boosting function like ordinary batteries connected in series, so as to achieve a relatively ideal photoelectric conversion efficiency. The first insulating part 3005 is used to insulate the connecting part 3004 from the second electrode 3002 of the first charging unit 301 to avoid short-circuiting between the connecting part 3004 and the second electrode 3002 of the first charging unit 301, and the second insulating part 3006 It is used to insulate and isolate the connection part 3004 from the first electrode 3001 of the second charging unit 302 , so as to prevent the connection part 3004 from being short-circuited with the first electrode 3001 of the second charging unit 302 .

It should be noted that when the solar charging panel 30 includes at least three or more charging units 300 connected in series, the cross-sectional structural diagram of the solar charging panel 30 is shown in FIG. 10 , and FIG. 10 shows the three charging units 300 electrically connected in series in this embodiment A schematic cross-sectional structure diagram, when the solar charging panel 30 includes three charging units 300 connected in series, which are a first charging unit 301, a second charging unit 302, and a third charging unit 303 respectively;

At this time, the first electrode 3001 of the first charging unit 301 and the second electrode 3002 of the second charging unit 302 are electrically connected through the first connection part 30041 , and the second electrode 3002 of the second charging unit 302 and the third charging unit 303 The first electrode 3001 is electrically connected through the second connection portion 30042; in the direction X parallel to the light-emitting surface E of the transparent display panel 10, between the first connection portion 30041 and the PN junction 3003 of the first charging unit 301 and the second electrode 3002 A first insulating portion 3005 is provided, a second insulating portion 3006 is provided between the first connecting portion 30041 and the first electrode 3001 of the second charging unit 302 and the PN junction 3003, and the second connecting portion 30042 is connected to the second charging unit 302. A third insulating portion 3007 is provided between the PN junction 3003 and the first electrode 3001, and a fourth insulating portion 3008 is provided between the second connecting portion 30042 and the second electrode 3001 and the PN junction 3003 of the third charging unit 302; The second electrode 3002 of the charging unit 303 is electrically connected to one pole of the power module 20 through a first metal wire 41 ; the second electrode 3002 of the first charging unit 301 is electrically connected to the other pole of the power module 20 through a second metal wire 42 Electrically connected, so as to realize that the three charging units 300 play a boosting function like ordinary batteries connected in series, and can achieve a relatively ideal photoelectric conversion efficiency.

It should be further explained that FIGS. 1 to 4 are only schematic structural diagrams illustrating that the solar charging panel 30 includes two charging units 300 that are electrically connected in series, and FIG. Schematic diagram of the structure of the charging unit 300, when the solar charging panel 30 includes four charging units 300, as shown in FIG. 11, FIG. 11 is a schematic plan view of another display device provided by an embodiment of the present invention. The display device of this embodiment 000, the solar charging panel 30 not only includes the first charging unit 301 and the second charging unit 302 in the first direction X1, but also includes the third charging unit 303 and the fourth charging unit 304 in the second direction X2, four charging units. The series electrical connection structure of the units 300 can be connected with the second electrode 3002 (negative or positive) of the second charging unit 300 through the first electrode 3001 (positive or negative) of the first charging unit 300 , and the second charging unit 300 The second electrode 3002 (negative or positive) of the third charging unit 300 is connected to the first electrode 3001 (positive or negative) of the third charging unit 300, and the first electrode 3001 (positive or negative) of the third charging unit 300 is connected to the fourth charging unit 300. The second electrode 3002 (negative or positive) of the unit 300 is connected to each other. At this time, the first electrode 3001 of the fourth charging unit 300 can be electrically connected to one electrode of the power module 20 through a first metal wire 41. The first charging unit The second electrode 3002 of the 300 is electrically connected to one electrode of the power module 20 through a second metal wire 42, so as to realize that the three charging units 300 play a boosting function like ordinary batteries connected in series, which can further achieve an ideal photoelectric conversion efficiency. .

In some optional embodiments, please refer to FIG. 12 and FIG. 13 , FIG. 12 is a schematic plan view of another display device provided by an embodiment of the present invention, and FIG. 13 is a block diagram of an electrical connection structure of the display device of FIG. 12 . In the embodiment, the solar charging panel 30 includes at least two charging groups 50 , each charging group 50 includes at least two charging units 300 connected in series, and the first electrodes 3001 of each charging group 50 are connected to each other through a first metal wire 41 respectively. One pole of the power supply module 20 is electrically connected, and the second pole 3002 of each charging group 50 is electrically connected to the other pole of the power supply module 20 through a second metal wire 42 respectively.

This embodiment further explains that the solar charging panel 30 includes at least two charging groups 50 , and FIG. 12 takes the solar charging panel 30 including four charging groups 50 as an example for illustration, and each charging group 50 includes at least two series-connected charging groups 50 . In the charging unit 300 , the first electrodes 3001 of each charging group 50 are electrically connected to one electrode of the power module 20 through a first metal wire 41 respectively, and the second electrodes 3002 of each charging group 50 are respectively connected through a second metal wire 42 It is electrically connected to the other pole of the power module 20. For example, the solar charging panel 30 includes a first charging group 501, a second charging group 502, a third charging group 503, and a fourth charging group 504. The first electrode of the first charging group 501 3001 are respectively electrically connected to one pole of the power supply module 20 through the same first metal wire 41(1), and the second electrodes 3002 of the first charging group 501 are respectively connected to the one pole of the power supply module 20 through the same second metal wire 42(1). The other pole is electrically connected; the first electrodes 3001 of the second charging group 502 are respectively electrically connected to one pole of the power module 20 through the same first metal wire 41(2), and the second electrodes 3002 of the second charging group 502 are respectively The same second metal wire 42(2) is electrically connected to the other pole of the power module 20; Electrical connection, the second electrodes 3002 of the third charging group 503 are respectively electrically connected to the other electrode of the power module 20 through the same second metal wire 42(3); the first electrodes 3001 of the fourth charging group 504 are respectively connected through the same The first metal wire 41(4) is electrically connected to one pole of the power module 20, and the second electrodes 3002 of the fourth charging group 504 are respectively electrically connected to the other pole of the power module 20 through the same second metal wire 42(4). . The solar charging panel 30 of this embodiment includes at least two charging groups 50, and the charging groups 50 are electrically connected in parallel, and the charging units 300 in each charging group 50 are electrically connected in series. UMC connection, even if the corresponding area of one of the charging groups 50 is not illuminated by light and cannot convert light energy into electrical energy to generate electricity, the remaining charging groups 50 can still be powered by the first metal wire 41 and the second metal wire 42 that are electrically connected to themselves. 20 charging, the solar charging panel 30 can still be used normally. Therefore, this embodiment can not only achieve the boosting effect, but also improve the stability of the voltage output, so as to avoid the occurrence of no light irradiation in the corresponding area when the screen of the transparent display panel 10 is partially blocked, and the light energy cannot be converted into electrical energy. power generation, which in turn causes the problem of a drop in the output voltage of the solar charging panel 30 .

It should be noted that the parallel electrical connection between the charging packs 50 in this embodiment can be achieved through the parallel electrical connection structure shown in FIG. 12 and FIG. 13 , and the power module 20 can also be designed to include multiple control terminals, which are controlled by each The terminal independently controls the input of each charging group 50, and can be set according to the actual situation during the specific implementation.

In some optional embodiments, please continue to refer to FIG. 1 to FIG. 5 , in this embodiment, in a charging unit 300 , the first electrode 3001 includes a plurality of strip-shaped sub-electrodes 30011 , and the second electrode 3002 is a whole-surface block structure .

This embodiment further explains that the first electrode 3001 on the side close to the transparent display panel 10 includes a plurality of strip-shaped sub-electrodes 30011, so that the contact area between the PN junction 3003 and the light can be maximized while realizing the solar power generation function. , so that the PN junction 3003 is irradiated by light as much as possible, which further improves the photoelectric conversion utilization rate of the display device.

It should be noted that this embodiment is only an example to illustrate that the first electrode 3001 may include a plurality of strip-shaped sub-electrodes 30011 to expose as much area of the PN junction 3003 as possible to be illuminated by light, but the first electrode 3001 is not limited to this structure. It can also be other structures, such as including a plurality of block or checkerboard structures, as long as the contact area between the PN junction 3003 and the light is as large as possible, which is not repeated in this embodiment.

In some optional embodiments, please continue to refer to FIGS. 1-5 , in this embodiment, in the same charging unit 300 , the plurality of strip-shaped sub-electrodes 30011 of the first electrode 3001 are connected to the power supply through the same first metal wire 41 . One pole of the module 20 is electrically connected.

This embodiment further explains that in the same charging unit 300, the plurality of strip-shaped sub-electrodes 30011 of the first electrode 3001 are electrically connected to one pole of the power module 20 through the same first metal wire 41, so that the The plurality of strip-shaped sub-electrodes 30011 are connected to the same first metal wire 41 and are electrically connected to one pole of the power module 20 as a whole. Although the first electrode 3001 is designed to be larger in size in order to maximize the contact area between the PN junction 3003 and the light The strip-shaped sub-electrodes 30011 still do not affect the photoelectric conversion effect of the solar charging panel 30 .

In some optional embodiments, please refer to FIG. 14 . FIG. 14 is a schematic plan view of another display device according to an embodiment of the present invention. In this embodiment, in the same charging unit 300 , each of the first electrodes 3001 The strip-shaped sub-electrodes 30011 are respectively electrically connected to one pole of the power module 20 through a first metal wire 41 .

This embodiment further explains that in the same charging unit 300, each strip-shaped sub-electrode 30011 of the first electrode 3001 is electrically connected to one pole of the power supply module 20 through a first metal wire 41, respectively, so as to connect the same charging unit 300 Each strip-shaped sub-electrode 30011 is electrically connected to one pole of the power module 20 through a first metal wire 41 respectively, that is, each strip-shaped sub-electrode 30011 is electrically connected to one pole of the power module 20 in parallel through a first metal wire 41 . , even if there is a problem with one or several strip-shaped sub-electrodes 30011 in the charging unit 300 (for example, when a small part of the screen is blocked, the strip-shaped sub-electrodes 3001 in this area are blocked, and the light energy cannot be converted into electrical energy for power generation), but Because each strip-shaped sub-electrode 30011 is connected in parallel, the remaining strip-shaped sub-electrodes 30011 in the charging unit 300 can still be used normally, so as to minimize the influence on the solar power generation effect of the charging unit 300 and ensure the stability of the output voltage.

In some optional embodiments, please refer to FIG. 1 and FIG. 15 . FIG. 15 is a block diagram of another electrical connection structure of the display device in FIG. 1 . The display device 000 in this embodiment further includes a display driving module 60 . The modules 60 are respectively electrically connected to the transparent display panel 10 and the power module 20 .

This embodiment further explains that the display device 000 further includes a display driving module 60 for providing a display driving signal. The optional display driving module 60 may be a driving chip. The display driving module 60 is connected to the transparent display panel 10 and the power supply module 20 respectively. The electrical connection, that is, the power supply module 20 can provide power for the transparent display panel 10 and can also provide power for the display driving module 60 , which is beneficial to further save the power consumption of the display device 000 .

In some optional embodiments, please continue to refer to FIG. 1 to FIG. 5 . In this embodiment, the first metal wire 41 and the first electrode 3001 are disposed in the same layer, and the second metal wire 42 and the second electrode 3002 are disposed in the same layer. .

This embodiment further explains that the orthographic projections to the transparent display panel 10 are all located within the non-display area NA. The first metal lines 41 and the second metal lines 42 can be arranged in layers, thereby facilitating the narrowing of the frame of the display device, and Optionally, the first metal wire 41 and the first electrode 3001 are disposed in the same layer, and the second metal wire 42 and the second electrode 3002 are disposed in the same layer, which can also improve the process efficiency and simplify the process flow.

It can be seen from the above embodiments that the display device provided by the present invention at least achieves the following beneficial effects:

The invention combines the transparent display panel with the solar charging panel, integrates the solar charging panel under the transparent display panel by means of film formation, and realizes the boosting effect through the series-connected charging unit structure inside the solar charging panel. The transparent display panel can have two states of display and non-display. In the non-display state, the entire transparent display panel is in a transparent state, and all light can pass through the transparent display panel for the solar charging panel to absorb, and convert the light energy into electrical energy. Charge the power module; in the display state, only the display area is opaque or flocculent white, and the other non-display areas are still transparent, which are still used for the transmission of light for the solar charging panel to absorb, and continue to transmit light energy. Converted into electrical energy to continuously charge the power module. The present invention has higher light energy utilization efficiency, enables the display device to effectively combine the solar energy technology with the display technology, utilizes the solar charging panel to effectively utilize the light energy and converts it into electrical energy, enables the display device to generate electricity by itself, and the solar energy technology has no danger of exhaustion. Safe and reliable, no noise, no pollution, no pollution, no geographical restrictions, high energy quality, which is conducive to saving power consumption, and the solar charging panel does not affect the display effect, which can make the transparent display more widely used. The solar charging panel has a built-in series-connected charging unit, which can further boost the voltage and achieve ideal photoelectric conversion efficiency.

Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are provided for illustration only and not for the purpose of limiting the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. A display device, comprising: the solar charging system comprises a transparent display panel, a power supply module and a solar charging panel, wherein the solar charging panel is positioned on one side of the transparent display panel;

the power module is electrically connected with the transparent display panel, and the solar charging panel is electrically connected with the power module;

the solar charging panel comprises at least two charging units which are respectively a first charging unit and a second charging unit, the first charging unit and the second charging unit are electrically connected in series, and the orthographic projection of the charging unit to the transparent display panel is positioned in the range of the display area;

along the direction perpendicular to the light-emitting surface of the transparent display panel, each charging unit comprises a first electrode and a second electrode which are oppositely arranged, and a PN junction is arranged between the first electrode and the second electrode;

the first electrode is positioned on one side of the second electrode close to the transparent display panel, the first electrode is electrically connected with one pole of the power module through a first metal wire, and the second electrode is electrically connected with the other pole of the power module through a second metal wire;

the orthographic projections of the first metal lines and the second metal lines to the transparent display panel are both located in the range of the non-display area.

2. The display device according to claim 1, wherein the PN junction comprises a P-type semiconductor and an N-type semiconductor stacked in a direction perpendicular to a light exit surface of the transparent display panel;

the first electrode is an anode, the second electrode is a cathode, the P-type semiconductor is positioned on one side of the first electrode close to the second electrode, and the N-type semiconductor is positioned on one side of the P-type semiconductor close to the second electrode;

or, the first electrode is a negative electrode, the second electrode is a positive electrode, the N-type semiconductor is located on one side of the first electrode close to the second electrode, and the P-type semiconductor is located on one side of the N-type semiconductor close to the second electrode.

3. The display device according to claim 1, wherein the first electrode of the first charging unit and the second electrode of the second charging unit are electrically connected through a connecting portion;

in a direction parallel to the light emitting surface of the transparent display panel, a first insulating part is arranged between the connecting part and the PN junction and the second electrode of the first charging unit, and a second insulating part is arranged between the connecting part and the first electrode and the PN junction of the second charging unit;

the first electrode of the second charging unit is electrically connected with one pole of the power supply module through one first metal wire; the second electrode of the first charging unit is electrically connected with the other electrode of the power module through one second metal wire.

4. The display device as claimed in claim 1, wherein the solar charging panel comprises at least two charging groups, each charging group comprises at least two charging units connected in series, the first electrode of each charging group is electrically connected to one pole of the power module through one first metal wire, and the second electrode of each charging group is electrically connected to the other pole of the power module through one second metal wire.

5. The display device according to claim 4, wherein the charging groups are electrically connected in parallel.

6. The display device according to claim 1, wherein the first electrode includes a plurality of stripe sub-electrodes and the second electrode has a full-area block structure in one of the charging units.

7. The display device according to claim 6, wherein the plurality of bar-shaped sub-electrodes of the first electrode are electrically connected to one electrode of the power supply module through the same first metal line in the same charging unit.

8. The display device according to claim 6, wherein each of the strip sub-electrodes of the first electrode is electrically connected to one electrode of the power module through one of the first metal lines in the same charging unit.

9. The display device according to claim 1, further comprising a display driving module electrically connected to the transparent display panel and the power module, respectively.

10. The display device according to claim 1, wherein the first metal line and the first electrode are disposed in the same layer, and wherein the second metal line and the second electrode are disposed in the same layer.

11. The display device according to claim 1, wherein the transparent display panel comprises a first transparent substrate and a second transparent substrate which are oppositely arranged, and a liquid crystal layer sandwiched between the first transparent substrate and the second transparent substrate, in a direction perpendicular to a light emitting surface of the transparent display panel, wherein the liquid crystal layer comprises polymer dispersed liquid crystal;

the first transparent substrate comprises a plurality of pixels arranged in an array, the pixels comprise pixel electrodes, the second transparent substrate comprises a common electrode layer, and the common electrode layer is connected with a common potential.

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