Photovoltaic display panel with light source recycling and recycling method thereof

Abstract

The application relates to the technical field of photovoltaic panels, and discloses a photovoltaic display panel with light source recycling and a recycling method thereof, wherein the photovoltaic display panel with light source recycling comprises a substrate, the substrate is provided with an effective pixel array area and a non-display dead area, the effective pixel array area comprises a plurality of sub-pixels arranged in a matrix, spaces exist between the adjacent sub-pixels, and the spaces are horizontal gaps between the sub-pixels; block-shaped photovoltaic units are arranged in the peripheral horizontal dead area of the non-display dead area; and strip-shaped semi-transparent photovoltaic units are arranged in the horizontal gaps between the sub-pixels. According to the application, no vertical superposition design is adopted, display interference is zero, the photovoltaic units are attached in the gaps between the sub-pixels, only occupy the horizontal space of the dead area, are vertically staggered with a light-emitting layer, do not shield a light-emitting path, have no optical interference, the display brightness remains original, the light transmittance is significantly improved, and the application is suitable for LCD, OLED, Mini LED and Micro LED panels.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic panel technology, specifically to a photovoltaic display panel with light source recovery and a method for recovering the same. Background Technology

[0002] Existing display panels (including the two mainstream types of LCD and OLED) are all composed of an effective pixel array area and a non-display dead zone: the effective pixel array area is composed of RGB sub-pixels. LCD panels achieve display by illuminating the sub-pixels with a backlight, while OLED panels achieve display by the sub-pixels emitting their own light. The core of the non-display dead zone is the horizontal gap between the sub-pixels, which also includes the peripheral wiring area, the driver IC bonding area, the edge packaging area, etc. It is only used to arrange the driving circuit, isolate adjacent pixels or package chips, and does not participate in image display. Moreover, the gap between the sub-pixels and the light-emitting layer do not overlap in the vertical direction, but are only distributed adjacently in the horizontal direction.

[0003] To improve the battery life of electronic devices, existing technologies mainly reduce energy consumption by increasing battery capacity and optimizing software power consumption, or by using external solar cells and full-screen transparent photovoltaic materials to supplement power. However, external solar cells can only utilize ambient light, increasing the thickness of the device and lacking synergy with the panel; full-screen transparent photovoltaic materials need to be vertically stacked with the light-emitting layer, resulting in low light transmittance, severe display interference, and low light energy utilization efficiency due to the lack of utilization of the panel's own light emission. Furthermore, they are only compatible with a single type of panel, lacking versatility and failing to achieve practical applications. Therefore, they do not meet the current needs. To address this, we propose a photovoltaic display panel with light source recovery and its recovery method. Summary of the Invention

[0004] This invention provides a photovoltaic display panel with light source recovery and its recovery method, which has the beneficial effects of being unaffected by ambient light and significantly improving power generation stability. It solves the problems mentioned in the background technology, such as external solar cells only utilizing ambient light, increasing equipment thickness and lacking synergy with the panel; full-screen transparent photovoltaic materials need to be vertically stacked with the light-emitting layer, resulting in low light transmittance, serious display interference, and low light energy utilization efficiency due to not utilizing the panel's own light emission; and it is only compatible with a single type of panel, lacking versatility and failing to achieve practical application.

[0005] This invention provides the following technical solution: a photovoltaic display panel with light source recovery capability, comprising: A substrate having an effective pixel array area and a non-display dead area, wherein the effective pixel array area includes a plurality of sub-pixels arranged in a matrix, and there is space between adjacent sub-pixels, wherein the space is a horizontal gap between sub-pixels; Block-shaped photovoltaic units are arranged in the horizontal dead zone surrounding the non-display dead zone; A strip-shaped semi-transparent photovoltaic unit is disposed inside the horizontal gap between the sub-pixels, so that the strip-shaped semi-transparent photovoltaic unit is closely attached to the sidewall of the adjacent sub-pixel and does not overlap with the light-emitting layer of the sub-pixel in the vertical direction; The strip-shaped semi-transparent photovoltaic unit and the block-shaped photovoltaic unit are electrically connected through the metal collection bus of the horizontal wiring layer to form a photovoltaic power generation system; The photovoltaic power generation system is configured to simultaneously absorb ambient light and horizontally propagated light from the sub-pixel or backlight.

[0006] As an alternative to the photovoltaic display panel with light source recovery described in this invention, a TFT backplane layer or an LTPS backplane layer is formed on the substrate, and the backplane layer defines the effective pixel array area and the non-display dead zone located between the sub-pixels. Before forming the pixel definition layer, a bottom electrode of the thin-film photovoltaic device is prepared at the horizontal gap between the sub-pixels. The bottom electrode is made of an opaque conductive material and is only distributed in the non-display dead zone. It is not directly electrically connected to the underlying TFT backplane layer or LTPS backplane layer as a photovoltaic electrode. A photovoltaic functional layer stack structure is deposited above the bottom electrode. The stack structure includes a hole transport layer or electron transport layer, a photovoltaic active layer, and an electron transport layer or hole transport layer stacked sequentially. The stacking order of the functional layers is determined according to the upright or inverted structure of the photovoltaic device. The photovoltaic active layer is patterned to form a strip structure that fills the gaps between adjacent sub-pixels; A transparent top electrode is deposited above the strip structure, thereby constructing a strip-shaped semi-transparent photovoltaic unit within the horizontal gap between the sub-pixels; The TFT backplane layer or LTPS backplane layer serves as the circuit base for controlling or reading signals and is electrically isolated from the strip-shaped semi-transparent photovoltaic unit.

[0007] As an optional embodiment of the photovoltaic display panel with light source recovery described in this invention, the step of electrically connecting via a metal collection bus includes: The design features a dual-bus architecture with separate positive and negative bus routing. The positive bus is arranged around the top and right edges of the display panel, while the negative bus is arranged around the bottom and left edges of the display panel, ensuring that the positive and negative buses are completely isolated in space and do not intersect. Branch buses are led out from the positive and negative buses to the edge of the pixel area, and are respectively connected to the positive and negative electrodes of all photovoltaic units; Ten adjacent strip-shaped semi-transparent photovoltaic units are grouped together and arranged in a square structure. Multiple groups of strip-shaped semi-transparent photovoltaic units are then connected in parallel to the positive and negative dual buses through the branch bus.

[0008] As an optional solution for the photovoltaic display panel with light source recovery described in this invention, the method further includes an integration step of a power management module: The display panel contains a control chip, which has no signal interaction with the display driver subsystem. When the panel type is detected as LCD, optimize the capture parameters for horizontally scattered backlight. When the panel type is detected as OLED, the absorption matching parameters for the horizontal peripheral light of the sub-pixel are optimized. The control chip performs maximum power point tracking and backflow prevention control, converting the electrical energy generated by the photovoltaic power generation system into a stable voltage output to the device's battery.

[0009] As an alternative embodiment of the photovoltaic display panel with light source recovery described in this invention, specific manufacturing steps for the LCD display panel include: A backlight layer, a TFT backplane layer, and a horizontal wiring layer are sequentially formed on the substrate, wherein the backlight layer only covers the vertical projection area of ​​the pixel array. Above the horizontal wiring layer and below the pixel definition layer, the strip-shaped semi-transparent photovoltaic unit is attached to the horizontal gap between the sub-pixels; The spectral response range of the active layer of the photovoltaic unit was adjusted to 400 to 700 nanometers to match the scattering spectral characteristics of the LCD backlight.

[0010] As an alternative solution to the photovoltaic display panel with light source recovery described in this invention, specific manufacturing steps for the OLED display panel include: A TFT backplane layer and a horizontal wiring layer are sequentially formed on the substrate; Above the horizontal wiring layer and below the pixel definition layer, the strip-shaped semi-transparent photovoltaic unit is attached to the horizontal gap between the sub-pixels; Subsequently, a self-emissive pixel layer is set inside the pixel definition layer opening to ensure that the self-emissive layer only covers the pixel area and is staggered in the vertical direction from the photovoltaic units in the gap; The spectral response range of the active layer of the photovoltaic unit was adjusted to 450 to 650 nanometers to match the self-emission spectral characteristics of OLED sub-pixels.

[0011] As an optional embodiment of the photovoltaic display panel with light source recovery described in this invention, the step of setting the arrangement rules of the strip-shaped semi-transparent photovoltaic units includes: For horizontally arranged photovoltaic units, the left electrode is designated as the negative electrode and the right electrode as the positive electrode; For vertically arranged photovoltaic units, the lower electrode is designated as the negative electrode and the upper electrode as the positive electrode. For block-shaped photovoltaic units within the surrounding horizontal dead zone, the outer edge electrode is set as the negative electrode, and the inner edge electrode near the pixel array is set as the positive electrode to ensure that it is consistent with the routing direction of the internal photovoltaic units.

[0012] As an alternative to the photovoltaic display panel with light source recovery described in this invention, the step of mounting photovoltaic units within the horizontal gaps between sub-pixels includes: Broad-spectrum organic photovoltaic materials are used as the photovoltaic active layer, and they are set into an ultra-thin flexible film with a thickness of 150 to 200 nanometers. A square micro-photovoltaic unit array is mounted in the horizontal gap between sub-pixels, with each micro-unit having a size of two to three micrometers. A circuit connection architecture of parallel connection within a group and series connection between groups is adopted. The micro photovoltaic units in the same gap are first connected in parallel, and then connected in series with the micro photovoltaic unit groups in adjacent gaps.

[0013] As an alternative to the photovoltaic display panel with light source recovery described in this invention, and as a suitable alternative for small devices with narrow bezels, it includes: Compact strip photovoltaic units, thinned out, are mounted within the horizontal gaps between narrow-pitch subpixels with a width of three to five micrometers, so that their thickness matches the size of the narrow gaps and there are no gaps. The horizontal extension structure of the TFT gate layer is reused as the lower electrode of the photovoltaic unit, omitting the process of setting a separate metal lower electrode; The integrated simplified power management system retains only dual-light source identification and voltage conversion functions, omitting the maximum power point tracking module.

[0014] This invention also provides a method for recycling photovoltaic display panels with light source recovery capabilities. S1. After the backlight emits light, some of the scattered light overflows horizontally into the mounted photovoltaic unit between the sub-pixels, and the ambient light directly illuminates the photovoltaic units between and around the sub-pixels. When the sub-pixels emit light, some of the peripheral light from the edges radiates horizontally to the mounted photovoltaic units in the gaps between the sub-pixels, and the ambient light simultaneously illuminates all the photovoltaic units; the active layer of the photovoltaic unit is attached to the sidewall of the sub-pixel, efficiently absorbing the two types of horizontally propagating light, and the light has a path that does not penetrate the light-emitting layer vertically, generating a photovoltaic effect that converts it into direct current. S2. Independent circuit transmission: Photovoltaic power is transmitted through horizontal wiring and layered isolation: The strip photovoltaic units are mounted in the horizontal gaps between individual sub-pixels and are independent power generation units. Each group is connected to the main collection bus through a horizontal micro bus and finally led out through the output electrode. The main collection bus and the display driving line, gate line and data line are located in different horizontal wiring layers and are completely isolated by the insulation layer, with no vertical crossing and crosstalk.

[0015] PMIC-PV identifies the panel type (LCD or OLED) in real time and optimizes power generation parameters through a dual-light source adaptation module: for LCD panels, it enhances the capture efficiency of horizontally scattered backlight. For OLED panels, the absorption matching of horizontal peripheral light of sub-pixels is optimized; at the same time, the power point tracking is used to ensure the power generation efficiency under different lighting conditions, the wide range of voltages is converted into stable voltages, and the reverse flow circuit prevents the battery current from flowing back into the photovoltaic unit.

[0016] S3. The display driving subsystem independently controls the operation of the light-emitting layer. The photovoltaic power generation system independently collects the horizontally propagating dual-source power through photovoltaic units mounted between sub-pixels. The two achieve interference-free collaboration through vertical misalignment, circuit isolation, and gap mounting, without affecting display brightness, color, and power generation efficiency.

[0017] S4. After the equipment is powered on, the backlight and sub-pixels of the LCD panel and the sub-pixels of the OLED panel start up synchronously. The photovoltaic units attached to the gaps between the sub-pixels immediately begin to collect ambient light and the horizontally propagated light of the panel itself to generate stable DC power. PMIC-PV synchronous startup automatically identifies panel type and switches adaptation mode; The display driver subsystem drives the pixel display according to the conventional process, and there is no signal interaction between the photovoltaic circuit and the display circuit. When the device status changes, such as low battery power or increased load, the PMIC-PV dynamically adjusts the power distribution charging or auxiliary power supply status to ensure that the power generation and display functions operate independently and stably without mutual interference.

[0018] The present invention has the following beneficial effects: 1. The photovoltaic display panel with light source recovery and its recovery method, through the non-vertical stacking design, displays zero interference. The photovoltaic unit is attached in the gap between sub-pixels, occupying only the dead zone horizontal space. It is vertically misaligned with the light-emitting layer, does not block the light-emitting path, has no optical interference, maintains the original level of display brightness, significantly improves light transmittance, and is applicable to LCD, OLED, Mini LED and Micro LED panels.

[0019] 2. The photovoltaic display panel with light source recovery and its recovery method adopt a surface-mount photovoltaic unit that is tightly bonded to the sidewall of the sub-pixel. This maximizes the absorption of horizontally propagated light from the panel itself, ambient light, backlight scattered light, and residual light from the pixels. It is not limited by ambient light, significantly improves power generation stability, and greatly reduces the impact of LCD panel power generation in indoor environments. This achieves a highly efficient recovery effect from dual light sources. Furthermore, the device does not require adjustments to the core sub-pixel gap mounting structure for LCD or OLED. It can be compatible with both types of panels simply by adapting the parameters of the power management module, greatly reducing the cost of using the device and thus significantly improving the light energy utilization efficiency of the device.

[0020] 3. The photovoltaic display panel with light source recovery and its recovery method utilize a dual-light source, interference-free, and gap-mounted high-efficiency absorption design to significantly reduce standby power consumption, greatly increase standby time, and extend high-load usage time. This enables the device to have energy-saving and power-reducing functions. Furthermore, the photovoltaic units are directly mounted in the idle gaps between sub-pixels without occupying additional panel space, achieving efficient utilization of the panel's idle horizontal space. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the photovoltaic integrated planar layout structure of the display panel of the present invention.

[0022] Figure 2 This is a schematic diagram of the photovoltaic integration structure of the display panel of the present invention.

[0023] Figure 3 This is a schematic diagram of the photovoltaic integrated circuit connection of the display panel of the present invention.

[0024] In the diagram: 100, display panel; 110, effective pixel array area; 102, non-display dead zone; 121, horizontal gap between sub-pixels; 102A, horizontal dead zone; 120, block photovoltaic unit; 121A, strip semi-transparent photovoltaic unit; 130, metal collection bus; 131, output electrode; 131-1, positive electrode; 131-2, negative electrode. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0026] Please see Figures 1-3The paper also discloses a photovoltaic display panel with light source recovery, including a substrate. An effective pixel array area 110 and a non-display dead area 102 are provided on the substrate. The effective pixel array area 110 includes a plurality of sub-pixels arranged in a matrix. There is a space between adjacent sub-pixels, which is a horizontal gap 121 between sub-pixels. A block photovoltaic unit 120 is provided in the horizontal dead zone 102A surrounding the non-display dead zone 102; A strip-shaped semi-transparent photovoltaic unit 121A is disposed inside the horizontal gap 121 between sub-pixels, so that the strip-shaped semi-transparent photovoltaic unit 121A is closely attached to the sidewall of the adjacent sub-pixel, and does not overlap with the light-emitting layer of the sub-pixel in the vertical direction. The strip-shaped semi-transparent photovoltaic unit 121A and the block photovoltaic unit 120 are electrically connected through the metal collection bus 130 of the horizontal wiring layer to form a photovoltaic power generation system; The photovoltaic power generation system is configured to simultaneously absorb ambient light and horizontally propagated light from sub-pixels or backlights.

[0027] After the TFT backplane layer is formed and before the pixel definition layer is formed, photovoltaic active layer material is deposited or transferred at the horizontal gap 121 between sub-pixels. The photovoltaic active layer material is patterned to form a strip structure with a width of five to ten micrometers, which fills the gap between adjacent sub-pixels. A transparent electrode is placed above the strip structure to complete the construction of the strip-shaped semi-transparent photovoltaic unit 121A, ensuring that its top does not exceed the top surface of the sub-pixel light-emitting layer.

[0028] The design features a separate routing architecture for positive and negative dual buses. The positive bus is arranged around the upper and right edges of the display panel 100, while the negative bus is arranged around the lower and left edges of the display panel 100, so that the positive and negative buses are completely isolated in space and do not cross each other. The positive and negative bus includes a positive electrode 131-1 and a negative electrode 131-2, which are connected to the positive and negative electrodes of all photovoltaic units, respectively. Ten adjacent strip-shaped semi-transparent photovoltaic units 121A are grouped together and arranged in a square structure. Multiple groups of strip-shaped semi-transparent photovoltaic units 121A are then connected in parallel to the positive and negative dual buses via a branch bus.

[0029] The display panel 100 contains a control chip that has no signal interaction with the display driver subsystem. Configure the control chip to execute dual-light source adaptation logic: when the panel type is detected as LCD, optimize the capture parameters for horizontal scattered backlight; when the panel type is detected as OLED, optimize the absorption matching parameters for horizontal peripheral light of sub-pixels. The control chip performs maximum power point tracking and backflow prevention control, converting the electrical energy generated by the photovoltaic power generation system into a stable voltage output to the device's battery.

[0030] A backlight layer, a TFT backplane layer, and a horizontal wiring layer are sequentially formed on the substrate, wherein the backlight layer only covers the vertical projection area of ​​the pixel array. Above the horizontal wiring layer and below the pixel definition layer, a strip-shaped semi-transparent photovoltaic unit 121A is mounted in the horizontal gap 121 between sub-pixels; The spectral response range of the active layer of the photovoltaic unit was adjusted to 400 to 700 nanometers to match the scattering spectral characteristics of the LCD backlight.

[0031] A TFT backplane layer and a horizontal wiring layer are sequentially formed on the substrate; Above the horizontal wiring layer and below the pixel definition layer, a strip-shaped semi-transparent photovoltaic unit 121A is mounted in the horizontal gap 121 between sub-pixels; Subsequently, a self-emissive pixel layer is set inside the pixel definition layer opening to ensure that the self-emissive layer only covers the pixel area and is staggered in the vertical direction from the photovoltaic units in the gap; The spectral response range of the active layer of the photovoltaic unit was adjusted to 450 to 650 nanometers to match the self-emission spectral characteristics of OLED sub-pixels.

[0032] For horizontally arranged photovoltaic units, the left electrode is designated as the negative electrode and the right electrode as the positive electrode; For vertically arranged photovoltaic units, the lower electrode is designated as the negative electrode and the upper electrode as the positive electrode. For the block photovoltaic unit 120 within the surrounding horizontal dead zone 102A, the outer edge electrode is set as the negative electrode and the inner edge electrode near the pixel array is set as the positive electrode to ensure that it is consistent with the routing direction of the internal photovoltaic unit.

[0033] Broad-spectrum organic photovoltaic materials are used as the photovoltaic active layer, and they are set into an ultra-thin flexible film with a thickness of 150 to 200 nanometers. A square micro-photovoltaic unit array is mounted within the horizontal gap 121 between sub-pixels, with each micro-unit having a size of two to three micrometers. A circuit connection architecture of parallel connection within a group and series connection between groups is adopted. The micro photovoltaic units in the same gap are first connected in parallel, and then connected in series with the micro photovoltaic unit groups in adjacent gaps.

[0034] Within the horizontal gap 121 between narrow-pitch subpixels with a width of three to five micrometers, a thinned compact strip photovoltaic unit is mounted so that its thickness matches the size of the narrow gap and there is no gap. The horizontal extension structure of the TFT gate layer is reused as the lower electrode of the photovoltaic unit, omitting the process of setting a separate metal lower electrode; The integrated simplified power management system retains only dual-light source identification and voltage conversion functions, omitting the maximum power point tracking module.

[0035] Substrate preparation and layer structure construction; First, a glass display substrate is provided, and a TFT backplane layer, including a gate, source and drain, and a semiconductor active layer, is sequentially deposited and patterned on the substrate. Then, a horizontal wiring layer is provided above the TFT backplane layer. This layer is not only used for signal transmission, but also serves as the lower electrode contact point or support layer of the subsequent photovoltaic unit. It should be noted that thin-film photovoltaic devices generally have a sandwich structure, requiring top and bottom electrodes, followed by a hole transport layer (or electron transport layer), an active layer, and another electron transport layer (or hole transport layer). The order of the functional layers depends on whether the photovoltaic device is upright or inverted.

[0036] The active layer is generally achieved through coating, inkjet printing, or vapor deposition. Patterning is generally achieved through laser (coating), photomask (vapor deposition), or inkjet printing, which can directly form patterns.

[0037] TFT backplanes are not usually used directly as electrodes for thin-film photovoltaics. Instead, they are used as circuit boards for controlling or reading signals. They are combined with special thin-film photovoltaic electrodes (usually transparent conductive layers) to form a complete device or module. Therefore, electrodes need to be fabricated again in the dead space (no transparent electrodes are required). The top electrode needs to be transparent. All the dead areas that need to be set for photovoltaic thin films also need to be fabricated with the bottom electrode first. Next, a pixel definition layer is applied, which has multiple openings to define the effective pixel array area 110. Between adjacent sub-pixels, red, green and blue, a horizontal gap 121 with a width of about 5-8 μm is naturally formed. On the periphery of the pixel array, a non-display dead zone 102 is reserved, especially the peripheral horizontal dead zone 102A.

[0038] The photovoltaic units are installed and mounted, including the 121A strip-shaped semi-transparent photovoltaic unit: Broad-spectrum organic photovoltaic materials or perovskite materials are used as photovoltaic active layers. The photovoltaic active layer materials are precisely filled into the horizontal gaps 121 between the sub-pixels by slit coating or inkjet printing processes. The active layer width is controlled to be 6μm and the thickness to be 180nm, ensuring that it completely fills the gaps and that the top does not exceed the surface of the pixel definition layer, so as to avoid affecting the uniformity of the subsequent liquid crystal cell thickness. A transparent conductive oxide is deposited on top of the active layer as the upper electrode and connected to the metal collection bus 130 of the horizontal wiring layer. For horizontally arranged units, the left electrode is set as the negative electrode and the right electrode as the positive electrode; for vertically arranged units, the bottom is negative and the top is positive. Every 10×10 adjacent strip units are connected in series to form a group to match the subsequent power management voltage requirements.

[0039] Block photovoltaic unit 120, within the dead zone: Within the surrounding horizontal dead zone 102A, a large-area block photovoltaic unit 120 is set using traditional amorphous silicon or thin-film silicon technology. It is mainly used to absorb pure ambient light. Its outer edge is set as the negative electrode, and its inner edge, near the pixel area, is set as the positive electrode to maintain the same polarity as the internal unit.

[0040] Circuit connection architecture: The positive and negative dual bus is arranged in a separate routing architecture. The positive bus is arranged around the upper and right edges of the display panel 100, and the negative bus is arranged around the lower and left edges of the display panel 100. The positive and negative buses are completely isolated in space with no intersection points to prevent short circuits. Branch buses are drawn from the dual bus to the edge of the pixel area, connecting to the positive and negative terminals of all photovoltaic units respectively. This layout maximizes current collection efficiency and reduces resistance loss.

[0041] After the photovoltaic unit is mounted, the conventional LCD manufacturing process continues: Coating an alignment layer, rubbing, dispensing liquid crystal, and bonding color filter substrate and polarizer; In this embodiment, the band gap of the photovoltaic active layer is adjusted to respond to the 400-700nm wavelength band to best match the horizontal propagation spectrum of the LCD backlight, which is typically the white light from the LED scattered by the light guide plate.

[0042] Power management involves binding a control chip to the periphery of the panel. This chip is independent of the display driver and has no signal interaction. When the system detects that the backlight is on, the device automatically switches to dual-source mode to optimize the capture of backlight scattered light. When the backlight is off, such as when the screen is off to display time, it switches to ambient light mode. The chip performs maximum power point tracking and backflow prevention control, and stores the generated power into the device battery after voltage regulation.

[0043] It should be noted that the photovoltaic units adapted in this example are OPV, perovskite solar cells, dye-sensitized solar cells, etc. Example 2

[0044] This embodiment is a substitution based on Embodiment 1. For details, please refer to [link / reference]. Figure 1-3 OLED panels do not require a backlight or liquid crystal layer.

[0045] After the TFT backplane layer and horizontal wiring layer are set, the strip-shaped semi-transparent photovoltaic unit 121A is directly mounted in the horizontal gap 121 between sub-pixels; Subsequently, an organic light-emitting layer and a cathode are deposited within the opening of the pixel definition layer. The key point is that the light-emitting layer is strictly confined within the opening and is completely misaligned with the photovoltaic unit in the gap in the vertical direction, with no overlap or obstruction, ensuring that the luminous efficiency is not compromised. At the same time, the photovoltaic unit can receive the horizontal residual light overflowing from the side wall of the light-emitting layer.

[0046] Since OLED subpixels, especially blue and red light, have narrow spectra, this embodiment adjusts the spectral response range of the photovoltaic active layer to 450-650nm, focusing on enhancing the absorption efficiency of the OLED main wavelength band.

[0047] An ultra-thin flexible film with a thickness of 150nm is used as the photovoltaic unit to meet the stringent requirements of OLED panels for thickness and bending performance.

[0048] For alternative circuit connections, targeting high-resolution small-sized screens and small devices with narrow bezels such as mobile phones, where the subpixel pitch is extremely narrow (3-5μm), this embodiment adopts the following alternative strategy: Miniaturized arrays are 2×2 micro photovoltaic unit arrays mounted in narrow gaps, with each unit measuring only 2-3 μm.

[0049] Electrode reuse directly reuses the horizontal extension structure of the TFT gate layer as the lower electrode of the photovoltaic unit, omitting the separate metal lower electrode process, simplifying the process flow and saving space.

[0050] The connection architecture employs parallel connection within a group and series connection between groups. The four micro-units within the same slot are first connected in parallel to increase current tolerance, and then connected in series with the unit group of the adjacent slot to increase voltage.

[0051] Considering the space constraints of small devices, the integrated power management system is simplified: the dual-source ambient light and pixel afterlight recognition functions and DC-DC voltage conversion functions are retained, the complex MPPT module is omitted, and fixed duty cycle tracking is adopted to reduce chip area and power consumption.

[0052] As can be seen from the above embodiments, the present invention cleverly transforms dead zones and gaps into production zones without changing the basic structure of the existing display panel 100 or affecting the display effect, thus achieving the dual functions of display and energy self-sufficiency.

[0053] The present invention also provides a photovoltaic display panel 100 with light source recycling and a recycling method thereof, wherein: S1. After the backlight emits light, some of the scattered light overflows horizontally into the mounted photovoltaic unit between the sub-pixels, and the ambient light directly illuminates the photovoltaic units between and around the sub-pixels. In an OLED panel, when the sub-pixels emit light, some of the peripheral light from the edges radiates horizontally to the mounted photovoltaic units in the gaps between the sub-pixels, and the ambient light simultaneously illuminates all the photovoltaic units. The active layer of the photovoltaic unit is attached to the sidewall of the sub-pixel, which efficiently absorbs the two types of horizontally propagating light, and the light has a path that does not penetrate the light-emitting layer vertically, generating a photovoltaic effect that converts it into direct current. S2. Independent circuit transmission: Photovoltaic power is transmitted through horizontal wiring and layered isolation: The strip photovoltaic unit mounted in the horizontal gap 121 between individual sub-pixels is an independent power generation unit. Adjacent 10×10 groups are connected in series to form a group to increase the voltage. Each group is connected to the main collection bus through a horizontal micro bus and finally led out through the output electrode 131. The main collection bus and the display driving line, gate line and data line are located in different horizontal wiring layers and are completely isolated by the insulation layer, with no vertical crossing and crosstalk.

[0054] PMIC-PV identifies the panel type (LCD or OLED) in real time and optimizes power generation parameters through a dual-light source adaptation module: for LCD panels, it enhances the capture efficiency of horizontally scattered backlight. For OLED panels, the absorption matching of horizontal peripheral light of sub-pixels is optimized; at the same time, the power point tracking is used to ensure the power generation efficiency under different lighting conditions, the wide range of voltages is converted into stable voltages, and the reverse flow circuit prevents the battery current from flowing back into the photovoltaic unit.

[0055] S3. The display driving subsystem independently controls the operation of the light-emitting layer. The photovoltaic power generation system independently collects the horizontally propagating dual-source power through photovoltaic units mounted between sub-pixels. The two achieve interference-free collaboration through vertical misalignment, circuit isolation, and gap mounting, without affecting display brightness, color, and power generation efficiency.

[0056] S4. After the equipment is powered on, the backlight and sub-pixels of the LCD panel and the sub-pixels of the OLED panel start up synchronously. The photovoltaic units mounted in the gaps between the sub-pixels immediately begin to collect ambient light and the horizontally propagated light from the panel itself to generate stable DC power. The PMIC-PV starts up synchronously, automatically identifies the panel type and switches the adaptation mode. The display driving subsystem drives the pixel display according to the normal process, and there is no signal interaction between the photovoltaic circuit and the display circuit. When the equipment status changes, such as low battery power or increased load, the PMIC-PV dynamically adjusts the power distribution charging or auxiliary power supply status to ensure that the power generation and display functions operate independently and stably without mutual interference.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0058] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A photovoltaic display panel with light source recovery capability, characterized in that, Includes the following steps: A substrate having an effective pixel array area (110) and a non-display dead area (102) thereon, wherein the effective pixel array area (110) includes a plurality of sub-pixels arranged in a matrix, and there is a space between each adjacent sub-pixel, wherein the space is a horizontal gap (121) between sub-pixels. Block photovoltaic units (120) are provided in the horizontal dead zone (102A) surrounding the non-display dead zone (102). A strip-shaped semi-transparent photovoltaic unit (121A) is disposed inside the horizontal gap (121) between the sub-pixels. The strip-shaped semi-transparent photovoltaic unit (121A) is closely attached to the sidewall of the adjacent sub-pixel and does not overlap with the light-emitting layer of the sub-pixel in the vertical direction. The strip-shaped semi-transparent photovoltaic unit (121A) and the block photovoltaic unit (120) are electrically connected through the metal collection bus (130) of the horizontal wiring layer to form a photovoltaic power generation system; The photovoltaic power generation system is used to simultaneously absorb ambient light and / or horizontally propagated light from the sub-pixel or backlight.

2. The photovoltaic display panel with light source recovery according to claim 1, characterized in that: A TFT backplane layer or an LTPS backplane layer is formed on the substrate, the backplane layer defining an effective pixel array area and a non-display dead zone (102) located between sub-pixels. Before forming the pixel definition layer, a bottom electrode of the thin-film photovoltaic device is prepared at the horizontal gap (121) between the sub-pixels. The bottom electrode is made of an opaque conductive material and is only distributed in the non-display dead zone. It is not directly electrically connected to the underlying TFT backplane layer or LTPS backplane layer as a photovoltaic electrode. A photovoltaic functional layer stack structure is deposited above the bottom electrode. The stack structure includes a hole transport layer or electron transport layer, a photovoltaic active layer, and an electron transport layer or hole transport layer stacked sequentially. The stacking order of the functional layers is determined according to the upright or inverted structure of the photovoltaic device. The photovoltaic active layer is patterned to form a strip structure that fills the gaps between adjacent sub-pixels; A transparent top electrode is deposited above the strip structure to construct a strip-shaped semi-transparent photovoltaic unit (121A) within the horizontal gap between the sub-pixels. The TFT backplane layer or LTPS backplane layer serves as the circuit base for controlling or reading signals and is electrically isolated from the strip-shaped semi-transparent photovoltaic unit (121A).

3. The photovoltaic display panel with light source recovery according to claim 2, characterized in that: The design features a positive and negative dual-bus separate routing architecture, in which the positive bus is arranged along the right edge of the display panel (100), and the negative bus is arranged around the bottom and left edges of the display panel (100), so that the positive and negative buses are completely isolated in space and do not cross. The positive and negative bus includes a positive electrode (131-1) and a negative electrode (131-2), which are respectively connected to the positive and negative electrodes of all photovoltaic units; Several adjacent strip-shaped semi-transparent photovoltaic units (121A) are grouped together, and multiple groups of strip-shaped semi-transparent photovoltaic units (121A) are connected in parallel to the positive and negative dual buses through the branch bus.

4. The photovoltaic display panel with light source recovery according to claim 3, characterized in that: A control chip is installed inside the display panel (100), and the control chip has no signal interaction with the display driver subsystem; When the panel type is detected as LCD, optimize the capture parameters for horizontally scattered backlight. When the panel type is detected as OLED, the absorption matching parameters for the horizontal peripheral light of the sub-pixel are optimized. The control chip performs maximum power point tracking and backflow prevention control, converting the electrical energy generated by the photovoltaic power generation system into a stable voltage output to the device's battery.

5. The photovoltaic display panel with light source recovery according to claim 4, characterized in that: A backlight layer, a TFT backplane layer, and a horizontal wiring layer are sequentially formed on the substrate, wherein the backlight layer only covers the vertical projection area of ​​the pixel array. Above the horizontal wiring layer and below the pixel definition layer, the strip-shaped semi-transparent photovoltaic unit (121A) is attached in the horizontal gap (121) between sub-pixels. The first response range of the active layer spectrum of the photovoltaic unit is adjusted to match the scattering spectral characteristics of the LCD backlight.

6. The photovoltaic display panel with light source recovery according to claim 5, characterized in that: A TFT backplane layer and a horizontal wiring layer are sequentially formed on the substrate; Above the horizontal wiring layer and below the pixel definition layer, the strip-shaped semi-transparent photovoltaic unit (121A) is attached to the horizontal gap (121) between sub-pixels. A self-emissive pixel layer is set inside the pixel definition layer opening to ensure that the self-emissive layer only covers the pixel area and is staggered in the vertical direction from the photovoltaic units in the gap. The second response range of the active layer spectrum of the photovoltaic unit is adjusted to match the self-emission spectral characteristics of the OLED sub-pixels.

7. The photovoltaic display panel with light source recovery according to claim 6, characterized in that: The block photovoltaic unit (120) within the peripheral horizontal dead zone (102A) is configured with its outer edge electrode as negative and its inner edge electrode near the pixel array as positive, to ensure that it is consistent with the routing direction of the internal photovoltaic unit.

8. The method for recycling a photovoltaic display panel with light source recovery according to claim 7, characterized in that: S1. After the backlight emits light, some of the scattered light overflows horizontally into the mounted photovoltaic unit between the sub-pixels, and the ambient light directly illuminates the photovoltaic units between and around the sub-pixels. When the sub-pixels emit light on their own, some of the peripheral light from the edges radiates horizontally to the mounted photovoltaic units in the gaps between the sub-pixels, and the ambient light simultaneously illuminates all the photovoltaic units. The active layer of the photovoltaic unit is attached to the sidewall of the sub-pixel, which efficiently absorbs two types of horizontally propagating light. The light has a path that does not penetrate the light-emitting layer vertically, generating a photovoltaic effect that converts it into direct current. S2. Photovoltaic electricity is transmitted through horizontal wiring and layered isolation. The strip photovoltaic unit is attached to the horizontal gap (121) between individual sub-pixels and is an independent power generation unit. Each group is connected to the main collection bus through a horizontal micro bus and finally led out through the output electrode (131). The main collection bus and display driver lines, gate lines and data lines are located on different horizontal wiring layers and are completely isolated by an insulating layer, with no vertical crossing and crosstalk. PMIC-PV identifies the panel type (LCD or OLED) in real time and optimizes power generation parameters through a dual-light source adaptation module: for LCD panels, it enhances the capture efficiency of horizontally scattered backlight. For OLED panels, the absorption matching of horizontal peripheral light of sub-pixels is optimized, and the power generation efficiency under different lighting conditions is ensured through maximum power point tracking. A wide range of voltages is converted into a stable voltage, and the reverse flow circuit prevents the battery current from flowing back into the photovoltaic unit. S3. The display driving subsystem independently controls the operation of the light-emitting layer. The photovoltaic power generation system independently collects the horizontally propagating dual-source power through the photovoltaic units mounted between the sub-pixels. The two achieve interference-free collaboration through vertical misalignment, circuit isolation, and gap mounting. S4. The backlight and sub-pixels of the LCD panel and the sub-pixels of the OLED panel are activated simultaneously. The photovoltaic units attached in the gaps between the sub-pixels immediately begin to collect ambient light and the horizontally propagated light of the panel itself to generate stable DC power. PMIC-PV synchronous startup automatically identifies the panel type and switches the adaptation mode; the display driver subsystem drives the pixel display according to the conventional process, and there is no signal interaction between the photovoltaic circuit and the display circuit. When the device status changes, such as low battery power or increased load, the PMIC-PV dynamically adjusts the power distribution charging or auxiliary power supply status to ensure that the power generation and display functions operate independently and stably without mutual interference.

9. An electronic device, characterized in that, The device includes a processor and a memory, the processor being connected to the memory, the memory being used to store executable program code, and the processor running a program corresponding to the executable program code by reading the executable program code stored in the memory, for executing the method as described in claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method as described in claim 8.

Images