A method for calibrating the luminous current and gate voltage of a gate-controlled stacked structure light-emitting device

Abstract

The present invention discloses a method for calibrating the luminous current and gate voltage of a gate-controlled stacked structure light-emitting device, comprising: applying a first luminous current corresponding to a first grayscale value to the light-emitting device; applying a first luminous gate voltage to a first electrode and / or a second electrode based on the first luminous current and the luminous efficiency requirement of the light-emitting device, and collecting the actual luminous brightness in real time; adjusting the first luminous current and the first luminous gate voltage based on the actual grayscale value corresponding to the first grayscale value and the actual luminous brightness; determining the current first luminous current as a standard luminous current for the first grayscale value and the current first luminous gate voltage as a standard luminous gate voltage for the first grayscale value in response to the actual grayscale value matching the first grayscale value; repeating the above steps to obtain the standard luminous current and standard luminous gate voltage corresponding to each required grayscale value of the light-emitting device. The present invention can ensure that the luminous efficiency and luminous brightness of a gate-controlled light-emitting device simultaneously meet standard requirements.

Description

Technical Field

[0001] The present invention relates to the field of optoelectronic display, and in particular to a method for calibrating the light-emitting current and gate voltage of a gate-regulated stacked structure light-emitting device. Background Art

[0002] Light-emitting devices (LEDs) in optoelectronic displays are a crucial component of display devices, presenting images or information through light. The principle of light emission in many devices is based on the fact that, upon application of power, electrons and holes combine in the light-emitting layer to form excitons. When these excitons recombine, they release energy and emit light. Examples include QLEDs (quantum dot light-emitting diodes) and OLEDs (organic light-emitting diodes). These devices offer advantages such as rich color reproduction, high contrast, fast response, wide viewing angles, and energy conservation and environmental protection. The luminous efficiency or brightness of these devices is significantly affected by the carrier recombination process. Optimal device efficiency is typically achieved by combining different functional layers and quantum dots, a process that requires significant time, materials, and labor. Therefore, gate control has emerged. This technology allows for the creation of a built-in electric field within these devices, enabling the regulation of carrier mobility and, consequently, luminous efficiency or brightness. This improves luminous efficiency and brightness, eliminating the need to rely solely on material combinations to achieve optimal device efficiency.

[0003] During gate control of luminous efficiency, changes in carrier mobility not only affect luminous efficiency but also luminous brightness. This can result in the luminous brightness of the light-emitting device no longer meeting the required brightness when the luminous efficiency is adjusted to the required level during gate control, thus affecting display quality. Summary of the Invention

[0004] In view of some of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a method for calibrating the luminous current and gate voltage of a gate-regulated stacked structure light-emitting device, aiming to ensure that the luminous efficiency and luminous brightness of the gate-regulated light-emitting device meet the standard requirements at the same time.

[0005] To achieve the above objectives, the present invention provides a method for calibrating the luminous current and gate voltage of a gate-regulated stacked structure light-emitting device, which is applied to a gate-regulated stacked structure light-emitting device, wherein the light-emitting device includes a light-emitting unit, a gate insulating layer, and a gate regulation electrode; the light-emitting unit sequentially includes a first electrode, a light-emitting functional layer, and a second electrode; a first power supply is applied to the first electrode and the second electrode, the first power supply is used to power the light-emitting unit to emit light, and the gate regulation electrode applies a gate voltage relative to the first electrode and / or the second electrode, the gate voltage is used to construct an electric field to regulate the mobility of carriers in the light-emitting unit and adjust the luminous efficiency and luminous brightness of the light-emitting unit; the method includes:

[0006] Step S1, determining each required grayscale value of the light-emitting device, and obtaining a first light-emitting current corresponding to each required grayscale value when the gate voltage of the gate control electrode is removed;

[0007] Step S2: Controlling the first power supply to apply the first light-emitting current corresponding to the first grayscale value to the light-emitting device; controlling the gate control electrode to apply a first light-emitting gate voltage to the first electrode and / or the second electrode according to the first light-emitting current and the light-emitting efficiency requirement of the light-emitting device, and collecting the actual light-emitting brightness of the light-emitting device in real time; wherein the first grayscale value is any of the required grayscale values;

[0008] Step S3: adjusting the first light-emitting current and the first light-emitting grid voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light-emitting brightness; in response to the actual grayscale value matching the first grayscale value, determining the current first light-emitting current as the standard light-emitting current for the first grayscale value, and determining the current first light-emitting grid voltage as the standard light-emitting grid voltage for the first grayscale value;

[0009] Step S4, repeating steps S2 to S3 to obtain the standard light-emitting current and the standard light-emitting grid voltage corresponding to each required grayscale value of the light-emitting device.

[0010] Optionally, in step S2, controlling the gate control electrode to apply a first light-emitting gate voltage to the first electrode and / or the second electrode according to the first light-emitting current and the light-emitting efficiency requirement of the light-emitting device includes:

[0011] controlling the gate control electrode to apply different first light-emitting gate voltages to the first electrode and / or the second electrode according to the first light-emitting current, and collecting the first light-emitting efficiency of the light-emitting device in real time;

[0012] In response to the first luminous efficiency reaching the luminous efficiency requirement of the light emitting device, the adjustment of the first light emitting grid voltage is stopped.

[0013] Optionally, in step S3, adjusting the first light-emitting current and the first light-emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light-emitting brightness includes:

[0014] determining an adjustment direction and an adjustment amplitude of the first light-emitting current according to the first grayscale value and an actual grayscale value corresponding to the actual light-emitting brightness;

[0015] adjusting the first light-emitting current according to an adjustment direction and an adjustment amplitude of the first light-emitting current;

[0016] According to the adjusted magnitude of the first light-emitting current, the first light-emitting grid voltage is adjusted so that the light-emitting efficiency of the light-emitting device meets the requirement.

[0017] Optionally, after adjusting the first light-emitting current and the first light-emitting grid voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light-emitting brightness in step S3, the method further includes:

[0018] In response to the actual grayscale value corresponding to the adjusted actual luminous brightness not matching the first grayscale value, repeatedly adjusting the first luminous current and the first luminous gate voltage according to the actual grayscale value corresponding to the first grayscale value and the actual luminous brightness until the actual grayscale value matches the first grayscale value; wherein, the collection of the actual luminous brightness of the light-emitting device is maintained during the repeated process.

[0019] Optionally, step S1 includes:

[0020] Determining each of the required grayscale values ​​of the light-emitting devices;

[0021] Controlling the gate control electrode to maintain a gate voltage removal state, applying current to the light-emitting device, and collecting the light-emitting brightness of the light-emitting device in real time;

[0022] Continuously change the magnitude of the current applied to the light-emitting device, and record the corresponding current when the luminous brightness of the light-emitting device reaches each of the required grayscale values ​​in turn; and determine the current corresponding to when a certain required grayscale value is reached as the first light-emitting current of the required grayscale value.

[0023] Optionally, in step S3, adjusting the first light-emitting current and the first light-emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light-emitting brightness includes:

[0024] When the difference between the first grayscale value and the actual grayscale value is less than a first threshold, the first light-emitting current is kept unchanged, and the first light-emitting grid voltage is adjusted to make the actual grayscale value match the first grayscale value; wherein the adjustment range of the first light-emitting grid voltage meets the requirements of the light-emitting device for light-emitting efficiency.

[0025] Optionally, during use of the light-emitting device, the method further includes:

[0026] Obtaining a display grayscale value of the light-emitting device; and obtaining a corresponding display standard light-emitting current and a display standard light-emitting grid voltage according to the display grayscale value;

[0027] The first power supply is controlled to apply the display standard light emitting current to the light emitting device, and the gate control electrode is controlled to apply the display standard light emitting gate voltage to the first electrode and / or the second electrode.

[0028] Optionally, the light-emitting device is a quantum dot light-emitting diode, and the light-emitting functional layer includes a hole transport layer, a quantum dot light-emitting layer and an electron transport layer.

[0029] Optionally, the light-emitting device is an organic light-emitting diode, and the light-emitting functional layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer and an electron injection layer.

[0030] The beneficial effects of the present invention are as follows: The present invention first determines the first luminous current approximately corresponding to each required grayscale value; then, based on the original first luminous current, continuously adjusts the first luminous current and its corresponding first luminous grid voltage, so that the adjusted first luminous current and first luminous grid voltage can meet the required luminous efficiency of the light-emitting device and match the luminous brightness with the required grayscale value; finally, the matched first luminous current and first luminous grid voltage are calibrated to become the standard luminous current and standard luminous voltage for the gate-controlled luminous device with the required grayscale value. By calibrating the luminous current and luminous grid voltage of the gate-controlled stacked structure light-emitting device, the present invention solves the problem of gate-controlled luminous efficiency affecting luminous brightness.

[0031] In summary, the present invention can ensure that the brightness of the gate-controlled light-emitting device matches the required brightness while also ensuring that the light-emitting efficiency meets the required standards. Furthermore, the present invention reduces energy waste caused by low light-emitting device efficiency without affecting display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flow chart of a method for calibrating the light-emitting current and gate voltage of a gate-controlled stacked structure light-emitting device provided by a specific embodiment of the present invention;

[0033] Figure 2 1 is a schematic structural diagram of a gate-controlled stacked structure light-emitting device provided in a first specific embodiment of the present invention;

[0034] Figure 3 1 is a schematic structural diagram of a gate-controlled stacked structure light-emitting device provided in a second specific embodiment of the present invention;

[0035] Figure 4 1 is a schematic structural diagram of a gate-controlled stacked structure light-emitting device provided in a third specific embodiment of the present invention;

[0036] Figure 5 It is a schematic structural diagram of a gate-regulated stacked structure light-emitting device provided in the fourth specific embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention discloses a method for calibrating the light-emitting current and gate voltage of a gate-regulated stacked structure light-emitting device. Those skilled in the art can refer to the content of this article and appropriately improve the technical details. It should be noted in particular that all similar replacements and modifications are obvious to those skilled in the art and are considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments. Relevant personnel can obviously modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0038] The applicant's research has found that during gate control of luminous efficiency, changes in carrier mobility not only affect luminous efficiency but also luminous brightness. This can result in the luminous device no longer achieving the desired brightness even when the luminous efficiency is adjusted to the required level during gate control, thereby affecting display quality.

[0039] Therefore, an embodiment of the present invention provides a method for calibrating the luminous current and gate voltage of a gate-controlled stacked structure light-emitting device, which is applied to a gate-controlled stacked structure light-emitting device, wherein the light-emitting device includes a light-emitting unit, a gate insulating layer, and a gate control electrode; the light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode in sequence; a first power supply is applied to the first electrode and the second electrode, and the first power supply is used to power the light-emitting unit to emit light; the gate control electrode applies a gate voltage relative to the first electrode and / or the second electrode, and the gate voltage is used to construct an electric field to control the mobility of carriers in the light-emitting unit to adjust the luminous efficiency and luminous brightness of the light-emitting unit; Figure 1 As shown, the method includes:

[0040] Step S1: determining each required grayscale value of the light-emitting device, and obtaining a first light-emitting current corresponding to each required grayscale value when the gate voltage is removed from the gate control electrode.

[0041] It should be noted that when the gate voltage is removed from the gate control electrode (i.e., when there is no gate voltage), the first light-emitting current obtained serves as the basis for subsequent adjustments. Because gate control does not significantly affect brightness, using the first light-emitting current corresponding to no gate voltage as the basis for adjustment can reduce blindness.

[0042] In this specific embodiment, step S1 includes:

[0043] Determine the required grayscale values ​​of the light-emitting device;

[0044] The gate control electrode is controlled to maintain a gate voltage-removed state, current is applied to the light-emitting device, and the brightness of the light-emitting device is collected in real time;

[0045] The magnitude of the current applied to the light-emitting device is continuously changed. When the luminous brightness of the light-emitting device reaches each required grayscale value in turn, the corresponding current is recorded; the current corresponding to when a certain required grayscale value is reached is determined as the first light-emitting current of the required grayscale value.

[0046] It should be noted that general light-emitting devices require 256 grayscale values ​​for display, and there is a direct linear relationship between grayscale value and luminous brightness: the higher the grayscale value, the higher the corresponding brightness; the lower the grayscale value, the lower the corresponding brightness. This relationship allows for precise control of image brightness by adjusting the grayscale value, and is one of the important means of adjusting image contrast and brightness in image processing. The embodiments of the present invention can effectively obtain the initial first luminous current for each required grayscale value through the above method, which serves as the basis for subsequent adjustments.

[0047] In this specific embodiment, the light-emitting device is a quantum dot light-emitting diode, and the light-emitting functional layer includes a hole transport layer, a quantum dot light-emitting layer, and an electron transport layer.

[0048] QLED (Quantum Dot Light Emitting Diode) has certain advantages over general light-emitting devices in terms of brightness, color gamut and service life.

[0049] In another specific embodiment, the light-emitting device is an organic light-emitting diode, and the light-emitting functional layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer.

[0050] OLED (Organic Light Emitting Diode) has certain advantages over general light-emitting devices in terms of contrast and viewing angle.

[0051] Step S2, control the first power supply to apply a first light-emitting current corresponding to a first grayscale value to the light-emitting device; according to the first light-emitting current and the light-emitting efficiency requirements of the light-emitting device, control the gate control electrode to apply a first light-emitting gate voltage to the first electrode and / or the second electrode, and collect the actual light-emitting brightness of the light-emitting device in real time.

[0052] The first grayscale value is any required grayscale value.

[0053] It should be noted that the existing technology obtains better luminous efficiency through material matching experiments, while gate regulation can adjust the luminous efficiency of the light-emitting unit by applying gate voltage to build an electric field to regulate the mobility of carriers in the light-emitting unit, and can also achieve ideal luminous efficiency. Gate regulation can save a lot of experimental costs.

[0054] In this specific embodiment, step S2 controls the gate control electrode to apply a first light-emitting gate voltage to the first electrode and / or the second electrode according to the first light-emitting current and the light-emitting efficiency requirement of the light-emitting device; comprising:

[0055] According to the first light-emitting current, the gate regulating electrode is controlled to apply different first light-emitting gate voltages to the first electrode and / or the second electrode, and a first light-emitting efficiency of the light-emitting device is collected in real time;

[0056] In response to the first luminous efficiency reaching the luminous efficiency requirement of the light emitting device, the adjustment of the first light emitting grid voltage is stopped.

[0057] It should be noted that different light-emitting currents require different light-emitting grid voltages to achieve the same ideal light-emitting efficiency. Therefore, a first light-emitting current is required and a matching first light-emitting grid voltage is applied to achieve the required light-emitting efficiency.

[0058] Step S3, adjusting the first light-emitting current and the first light-emitting grid voltage according to the actual grayscale value corresponding to the first grayscale value and the actual light-emitting brightness; in response to the actual grayscale value matching the first grayscale value, determining the current first light-emitting current as the standard light-emitting current of the first grayscale value, and determining the current first light-emitting grid voltage as the standard light-emitting grid voltage of the first grayscale value.

[0059] In this specific embodiment, adjusting the first light emitting current and the first light emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light emitting brightness in step S3 includes:

[0060] determining an adjustment direction and an adjustment amplitude of the first light-emitting current according to the first grayscale value and an actual grayscale value corresponding to the actual light-emitting brightness;

[0061] Adjusting the first light-emitting current according to the adjustment direction and adjustment amplitude of the first light-emitting current;

[0062] According to the adjusted magnitude of the first light-emitting current, the first light-emitting grid voltage is adjusted so that the light-emitting efficiency of the light-emitting device meets the requirement.

[0063] It should be noted that when the first light-emitting current changes, in order to maintain the light-emitting efficiency within the requirement, the first light-emitting grid voltage needs to be changed so that the first light-emitting grid voltage matches the first light-emitting current.

[0064] In another specific embodiment, adjusting the first light emitting current and the first light emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light emitting brightness in step S3 includes:

[0065] When the difference between the first grayscale value and the actual grayscale value is less than a first threshold, the first light-emitting current is kept unchanged, and the first light-emitting grid voltage is adjusted to make the actual grayscale value match the first grayscale value; wherein the adjustment range of the first light-emitting grid voltage meets the requirements of the light-emitting device for light-emitting efficiency.

[0066] It should be noted that in this embodiment, the luminous efficiency requirement is relatively relaxed. It does not require the optimal luminous efficiency of gate regulation, but rather a range that includes the optimal luminous efficiency. Therefore, if only the first light-emitting gate voltage is adjusted to match the actual grayscale value with the first grayscale value, without exceeding this range, the adjustment efficiency can be greatly improved. The first threshold in this embodiment is determined based on this range.

[0067] In this specific embodiment, after adjusting the first light-emitting current and the first light-emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light-emitting brightness in step S3, the method further includes:

[0068] In response to the actual grayscale value corresponding to the adjusted actual luminous brightness not matching the first grayscale value, repeatedly adjusting the first luminous current and the first luminous gate voltage according to the actual grayscale value corresponding to the first grayscale value and the actual luminous brightness until the actual grayscale value matches the first grayscale value; wherein, the actual luminous brightness of the light-emitting device is maintained to be collected during the repeated process.

[0069] It should be noted that it is generally difficult to adjust in one step, and multiple repetitions are required to make the actual grayscale value match the first grayscale value.

[0070] Step S4, repeating steps S2 to S3 to obtain the standard light-emitting current and standard light-emitting gate voltage corresponding to each required grayscale value of the light-emitting device.

[0071] It should be noted that during the repetitive process, a required grayscale value is changed each time as the first grayscale value.

[0072] In this specific embodiment, during use of the light emitting device, the method further includes:

[0073] Obtaining a display grayscale value of the light-emitting device; obtaining a corresponding display standard light-emitting current and a display standard light-emitting gate voltage according to the display grayscale value;

[0074] The first power supply is controlled to apply a display standard light-emitting current to the light-emitting device, and the gate regulating electrode is controlled to apply a display standard light-emitting grid voltage to the first electrode and / or the second electrode.

[0075] It should be noted that this embodiment serves as a driving step in the subsequent use of the light-emitting device.

[0076] In the first specific embodiment, as Figure 2As shown, when the gate control electrode is located on the side of the second electrode, the second electrode is connected to the negative electrode of the first power supply, and the majority carriers of the light-emitting device are electrons, it is necessary to increase the luminous efficiency by making the gate control electrode apply a positive first light-emitting gate voltage to the second electrode.

[0077] It should be noted that, in the first specific embodiment, applying the first positive light emitting gate voltage may reduce the light emitting brightness, so generally the first light emitting current needs to be increased in the subsequent adjustment process of the first light emitting current.

[0078] When the OLED / QLED light-emitting functional layer of this embodiment is a QLED, the light-emitting functional layer includes a hole transport layer, a quantum dot light-emitting layer, and an electron transport layer. When the OLED / QLED light-emitting functional layer of this embodiment is an OLED, the light-emitting functional layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer.

[0079] In the second specific embodiment, Figure 3 As shown, when the gate control electrode is located on one side of the first electrode, the first electrode is connected to the positive electrode of the first power supply, and the majority carriers of the light-emitting device are holes, it is necessary to increase the luminous efficiency by applying a negative first light-emitting gate voltage to the first electrode.

[0080] It should be noted that, in the second specific embodiment, applying a negative first light-emitting grid voltage may reduce the light-emitting brightness, so generally the first light-emitting current needs to be increased in the subsequent adjustment process of the first light-emitting current.

[0081] When the OLED / QLED light-emitting functional layer of this embodiment is a QLED, the light-emitting functional layer includes a hole transport layer, a quantum dot light-emitting layer, and an electron transport layer. When the OLED / QLED light-emitting functional layer of this embodiment is an OLED, the light-emitting functional layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer.

[0082] In the third specific embodiment, Figure 4 As shown, when the gate control electrode is located on the side of the second electrode, the second electrode is connected to the negative electrode of the first power supply, and the majority carriers of the light-emitting device are holes, it is necessary to increase the luminous efficiency by causing the gate control electrode to apply a negative first light-emitting gate voltage to the second electrode.

[0083] It should be noted that, in the third specific embodiment, applying a negative first light-emitting grid voltage will increase the light-emitting brightness, so generally the first light-emitting current needs to be reduced in the subsequent adjustment process of the first light-emitting current.

[0084] When the OLED / QLED light-emitting functional layer of this embodiment is a QLED, the light-emitting functional layer includes a hole transport layer, a quantum dot light-emitting layer, and an electron transport layer. When the OLED / QLED light-emitting functional layer of this embodiment is an OLED, the light-emitting functional layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer.

[0085] In the fourth specific embodiment, Figure 5 As shown, when the gate control electrode is located on one side of the first electrode, the first electrode is connected to the positive electrode of the first power supply, and the majority carriers of the light-emitting device are electrons, it is necessary to increase the luminous efficiency by causing the gate control electrode to apply a positive first light-emitting gate voltage to the first electrode.

[0086] It should be noted that, in the fourth specific embodiment, applying the first positive light-emitting gate voltage will increase the light-emitting brightness, so generally the first light-emitting current needs to be reduced in the subsequent adjustment process of the first light-emitting current.

[0087] When the OLED / QLED light-emitting functional layer of this embodiment is a QLED, the light-emitting functional layer includes a hole transport layer, a quantum dot light-emitting layer, and an electron transport layer. When the OLED / QLED light-emitting functional layer of this embodiment is an OLED, the light-emitting functional layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer.

[0088] The embodiment of the present invention first determines the approximate first light-emitting current corresponding to each required grayscale value. Then, based on the original first light-emitting current, the first light-emitting current and its corresponding first light-emitting grid voltage are continuously adjusted so that the adjusted first light-emitting current and first light-emitting grid voltage can meet the required luminous efficiency of the light-emitting device and match the luminous brightness with the required grayscale value. Finally, the matched first light-emitting current and first light-emitting grid voltage are calibrated to become the standard light-emitting current and standard light-emitting voltage for the gate-controlled light-emitting device with the required grayscale value. By calibrating the light-emitting current and light-emitting grid voltage of the gate-controlled stacked structure light-emitting device, the embodiment of the present invention solves the problem of gate-controlled luminous efficiency affecting luminous brightness.

[0089] In summary, the embodiments of the present invention can ensure that the brightness of the gate-controlled light-emitting device matches the required brightness while also ensuring that the light-emitting efficiency meets the required standards. Furthermore, the embodiments of the present invention reduce the energy waste caused by the low light-emitting efficiency of the light-emitting device without affecting the display quality.

[0090] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0091] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A method for calibrating the luminous current and gate voltage of a gate-controlled stacked structure light-emitting device, which is applied to a gate-controlled stacked structure light-emitting device, characterized in that: The light-emitting device includes a light-emitting unit, a gate insulating layer, and a gate control electrode; the light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode in sequence; a first power supply is applied to the first electrode and the second electrode, the first power supply is used to power the light-emitting unit to emit light, and the gate control electrode applies a gate voltage relative to the first electrode and / or the second electrode, the gate voltage is used to construct an electric field to control the mobility of carriers in the light-emitting unit to adjust the luminous efficiency and luminous brightness of the light-emitting unit; the method includes: Step S1, determining each required grayscale value of the light-emitting device, and obtaining a first light-emitting current corresponding to each required grayscale value when the gate voltage of the gate control electrode is removed; Step S2: Controlling the first power supply to apply the first light-emitting current corresponding to the first grayscale value to the light-emitting device; controlling the gate control electrode to apply a first light-emitting gate voltage to the first electrode and / or the second electrode according to the first light-emitting current and the light-emitting efficiency requirement of the light-emitting device, and collecting the actual light-emitting brightness of the light-emitting device in real time; wherein the first grayscale value is any of the required grayscale values; Step S3: adjusting the first light-emitting current and the first light-emitting grid voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light-emitting brightness; in response to the actual grayscale value matching the first grayscale value, determining the current first light-emitting current as the standard light-emitting current for the first grayscale value, and determining the current first light-emitting grid voltage as the standard light-emitting grid voltage for the first grayscale value; Step S4, repeating steps S2 to S3 to obtain the standard light-emitting current and the standard light-emitting grid voltage corresponding to each required grayscale value of the light-emitting device.

2. The method for calibrating the light-emitting current and gate voltage of a gate-controlled stacked structure light-emitting device according to claim 1, characterized in that: The step S2 includes controlling the gate control electrode to apply a first light-emitting gate voltage to the first electrode and / or the second electrode according to the first light-emitting current and the light-emitting efficiency requirement of the light-emitting device; controlling the gate control electrode to apply different first light-emitting gate voltages to the first electrode and / or the second electrode according to the first light-emitting current, and collecting the first light-emitting efficiency of the light-emitting device in real time; In response to the first luminous efficiency reaching the luminous efficiency requirement of the light emitting device, the adjustment of the first light emitting grid voltage is stopped.

3. The method for calibrating the light emitting current and gate voltage of a gate-controlled stacked structure light emitting device according to claim 1, characterized in that: The step S3 of adjusting the first light emitting current and the first light emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light emitting brightness includes: determining an adjustment direction and an adjustment amplitude of the first light-emitting current according to the first grayscale value and an actual grayscale value corresponding to the actual light-emitting brightness; adjusting the first light-emitting current according to an adjustment direction and an adjustment amplitude of the first light-emitting current; According to the adjusted magnitude of the first light-emitting current, the first light-emitting grid voltage is adjusted so that the light-emitting efficiency of the light-emitting device meets the requirement.

4. The method for calibrating the light emitting current and gate voltage of a gate-controlled stacked structure light emitting device according to claim 1, wherein: After adjusting the first light emitting current and the first light emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light emitting brightness in step S3, the method further includes: In response to the actual grayscale value corresponding to the adjusted actual luminous brightness not matching the first grayscale value, repeatedly adjusting the first luminous current and the first luminous gate voltage according to the actual grayscale value corresponding to the first grayscale value and the actual luminous brightness until the actual grayscale value matches the first grayscale value; wherein, the collection of the actual luminous brightness of the light-emitting device is maintained during the repeated process.

5. The method for calibrating the light emitting current and gate voltage of a gate-controlled stacked structure light emitting device according to claim 1, characterized in that: The step S1 comprises: Determining each of the required grayscale values ​​of the light-emitting devices; Controlling the gate control electrode to maintain a gate voltage removal state, applying current to the light-emitting device, and collecting the light-emitting brightness of the light-emitting device in real time; Continuously change the magnitude of the current applied to the light-emitting device, and record the corresponding current when the luminous brightness of the light-emitting device reaches each of the required grayscale values ​​in turn; and determine the current corresponding to when a certain required grayscale value is reached as the first light-emitting current of the required grayscale value.

6. The method for calibrating the light emitting current and gate voltage of a gate-controlled stacked structure light emitting device according to claim 1, wherein: The step S3 of adjusting the first light emitting current and the first light emitting gate voltage according to the first grayscale value and the actual grayscale value corresponding to the actual light emitting brightness includes: When the difference between the first grayscale value and the actual grayscale value is less than a first threshold, the first light-emitting current is kept unchanged, and the first light-emitting grid voltage is adjusted to make the actual grayscale value match the first grayscale value; wherein the adjustment range of the first light-emitting grid voltage meets the requirements of the light-emitting device for light-emitting efficiency.

7. The method for calibrating the light emitting current and gate voltage of a gate-controlled stacked structure light emitting device according to claim 1, wherein: During use of the light emitting device, the method further includes: Obtaining a display grayscale value of the light-emitting device; and obtaining a corresponding display standard light-emitting current and a display standard light-emitting grid voltage according to the display grayscale value; The first power supply is controlled to apply the display standard light emitting current to the light emitting device, and the gate control electrode is controlled to apply the display standard light emitting gate voltage to the first electrode and / or the second electrode.

8. The method for calibrating the light emitting current and gate voltage of a gate-controlled stacked structure light emitting device according to claim 1, wherein: The light-emitting device is a quantum dot light-emitting diode, and the light-emitting functional layer includes a hole transport layer, a quantum dot light-emitting layer and an electron transport layer.

9. The method for calibrating the light emitting current and gate voltage of a gate-controlled stacked structure light emitting device according to claim 1, wherein: The light-emitting device is an organic light-emitting diode, and the light-emitting functional layer includes a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer and an electron injection layer.

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