Backlight current adjusting method of optical module and optical module
By generating a backlight current adjustment function in the optical module, the backlight current is dynamically adjusted to adapt to different temperatures, which solves the problem of unstable optical power of the optical module under different temperature conditions, improves the utilization rate and production yield of optical devices, and reduces production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-14
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional optical modules have unstable optical power output under different temperature conditions, which makes it impossible to use optical devices with large TE, reducing the utilization rate and production yield of optical devices.
By generating a backlight current adjustment function, and fitting a quadratic function based on the optical power and backlight current data of the optical module at different temperatures, the backlight current is dynamically adjusted to maintain it within the ideal threshold range, thereby achieving stable output of optical power.
Maintaining stable optical power output under different temperature conditions improves the utilization rate and production yield of optical devices and reduces production costs.
Smart Images
Figure CN121728635A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of optical devices, in particular to a backlight current adjustment method of an optical module and the optical module. BACKGROUND
[0002] In the current production process of optical modules, optical power debugging is a crucial step. However, in the traditional optical power debugging, the driving current Ibias is first debugged at temperature T1, the optical power is debugged to an appropriate size, recorded as P1, and the backlight current Im1 at this time is recorded. Then, Im1 is used as a locking value of the optical module at different temperatures, that is, the driving current is automatically set to make the monitored Im value equal to Im1 regardless of the temperature of the optical module. If the TE of the optical device is small, the optical power will be close to P1. However, if the same Im value is locked every time, the output optical power of the optical module will not meet the requirements when the TE of the optical device is large. Therefore, the TE of the optical device is required to be small during the production of the optical module, which is a strict requirement for the optical device, resulting in a low yield of the optical device.
[0003] Therefore, how to solve the above problems is a problem that needs to be solved at present. SUMMARY
[0004] The present application provides a backlight current adjustment method of an optical module and the optical module, which can realize the stability of optical power output under different temperature conditions, and can use optical devices with larger TE to improve the utilization rate of optical devices, thereby improving the production yield and reducing the production cost.
[0005] In a first aspect, the present application provides a backlight current adjustment method of an optical module, which comprises:
[0006] The optical module outputs an ideal backlight current according to a preset backlight current adjustment function when detecting a current temperature, wherein the backlight current adjustment function comprises a temperature parameter and a backlight current parameter.
[0007] The optical module debugs the driving current until the current backlight current is located in a threshold interval of the ideal backlight current.
[0008] In a possible embodiment, the preset backlight current adjustment function is generated in the following manner:
[0009] The first optical power of the optical module at a first temperature and the first backlight current corresponding to the first optical power are collected.
[0010] The second optical power of the optical module and the second backlight current corresponding to the second optical power are collected at a second temperature, wherein the second temperature is greater than the first temperature, and the second optical power plus a first threshold equals the first optical power;
[0011] The third optical power of the optical module at a third temperature and the third backlight current corresponding to the third optical power are collected; wherein, the third temperature is greater than the second temperature; the third optical power plus the first threshold equals the first optical power;
[0012] A backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current.
[0013] In one possible embodiment, the first threshold is zero.
[0014] In one possible embodiment, the first threshold is .
[0015] In one possible embodiment, generating a backlight current adjustment function based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current includes:
[0016] A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; the quadratic function serves as the backlight current adjustment function.
[0017] In one possible embodiment, a backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, including:
[0018] A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current;
[0019] Obtain the target temperature and target backlight current corresponding to the lowest point of the quadratic function;
[0020] If the first temperature < the target temperature < the second temperature < the third temperature, the temperature to be removed that is closest to the target temperature is removed, and the temperature to be removed is the first temperature or the second temperature;
[0021] If the temperature to be removed is the second temperature, when the temperature is lower than the target temperature, a first backlight current adjustment sub-function is generated based on the first temperature, the first backlight current, the target backlight current, and the target temperature;
[0022] and,
[0023] When the temperature is higher than the target temperature, a second backlight current adjustment sub-function is generated based on the third temperature, the third backlight current, the target backlight current, and the target temperature.
[0024] In one possible embodiment, a backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, including:
[0025] A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current;
[0026] Obtain the target temperature and target backlight current corresponding to the lowest point of the quadratic function;
[0027] If the first temperature < the target temperature < the second temperature < the third temperature, determine the first difference between the target temperature and the first temperature and the second difference between the target temperature and the third temperature;
[0028] If the first difference is less than the second difference, when the temperature is less than the target temperature, a first backlight current adjustment sub-function is generated based on the first temperature, the first backlight current, the target backlight current, and the target temperature.
[0029] The fourth temperature is obtained by averaging the target temperature and the third temperature.
[0030] The fourth backlight current corresponding to the fourth temperature is obtained based on the quadratic function.
[0031] When the temperature is greater than the target temperature and less than the fourth temperature, a second backlight current adjustment sub-function is generated based on the target backlight current, the target temperature, the fourth temperature and the fourth backlight current;
[0032] At the fourth temperature, a third backlight current adjustment sub-function is generated based on the fourth temperature, the fourth backlight current, the third temperature, and the third backlight current.
[0033] In one possible embodiment, a backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, including:
[0034] A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current;
[0035] Obtain the target temperature and target backlight current corresponding to the lowest point of the quadratic function;
[0036] If the first temperature < the target temperature < the second temperature < the third temperature, then obtain a fourth temperature and a fifth temperature; wherein the fourth temperature is equal to the average of the target temperature and the third temperature; and the fifth temperature is equal to the average of the target temperature and the first temperature.
[0037] The fourth backlight current and the fifth backlight current corresponding to the fourth temperature and the fifth temperature are obtained according to the quadratic function.
[0038] When the temperature is lower than the fifth temperature, a first backlight current adjustment sub-function is generated based on the first temperature, the first backlight current, the fifth temperature, and the fifth backlight current.
[0039] When the temperature is greater than the fifth temperature but less than the target temperature, a second backlight current adjustment sub-function is generated based on the fifth temperature and the fifth backlight current, the target backlight current and the target temperature;
[0040] When the temperature is greater than the target temperature and less than the fourth temperature, a third backlight current adjustment sub-function is generated based on the fourth temperature, the fourth backlight current, the target backlight current, and the target temperature.
[0041] When the temperature is higher than the fourth temperature, a fourth backlight current adjustment sub-function is generated based on the fourth temperature, the fourth backlight current, the third backlight current, and the third temperature.
[0042] In one possible embodiment, the threshold range is the ideal backlight current. .
[0043] Secondly, this application also provides an optical module, wherein the backlight current is adjusted using the backlight current adjustment method of the optical module as described in any one of the first aspects.
[0044] Beneficial effects: The backlight current adjustment method and optical module of the optical module provided in this application, when the optical module detects the current temperature, outputs an ideal backlight current according to a preset backlight current adjustment function; then the optical module dynamically adjusts the drive current until the current backlight current is within the threshold range of the ideal backlight current, so that the optical module can stabilize the optical power output under different temperature conditions, and at the same time, it can use optical devices with larger TE, improve the utilization rate of optical devices, improve the production yield, and reduce the production cost. Attached Figure Description
[0045] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0046] Figure 1 This is a flowchart illustrating a method for adjusting the backlight current of an optical module, as provided in an embodiment of this application. Detailed Implementation
[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0048] Example
[0049] Reference Figure 1 The flowchart shown illustrates a method for adjusting the backlight current of an optical module. This method specifically includes the following steps:
[0050] Step S201: When the optical module detects the current temperature, it outputs an ideal backlight current according to a preset backlight current adjustment function; wherein, the backlight current adjustment function includes temperature parameters and backlight current parameters.
[0051] It should be noted that the optical module is pre-configured with components capable of detecting temperature, such as a temperature sensor. No specific limitations are specified here.
[0052] As one implementation method, the preset backlight current adjustment function is generated by: acquiring a first optical power of the optical module at a first temperature and a first backlight current corresponding to the first optical power; acquiring a second optical power of the optical module at a second temperature and a second backlight current corresponding to the second optical power, wherein the second temperature is greater than the first temperature, and the second optical power plus a first threshold equals the first optical power; acquiring a third optical power of the optical module at a third temperature and a third backlight current corresponding to the third optical power; wherein the third temperature is greater than the second temperature; and the third optical power plus the first threshold equals the first optical power; and generating a backlight current adjustment function based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current.
[0053] In one possible embodiment, the first threshold is zero.
[0054] In yet another possible embodiment, the first threshold is .
[0055] As one implementation, generating a backlight current adjustment function based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current includes:
[0056] A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; the quadratic function serves as the backlight current adjustment function.
[0057] In another implementation, a backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current. This includes: fitting a quadratic function to the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; obtaining the target temperature and target backlight current corresponding to the lowest point of the quadratic function; if the first temperature < the target temperature < the second temperature < the third temperature, removing the temperature closest to the target temperature, where the temperature to be removed is either the first temperature or the second temperature; if the temperature to be removed is the second temperature, generating a first backlight current adjustment sub-function based on the first temperature, the first backlight current, the target backlight current, and the target temperature when the temperature is lower than the target temperature; and generating a second backlight current adjustment sub-function based on the third temperature, the third backlight current, the target backlight current, and the target temperature when the temperature is higher than the target temperature.
[0058] Optionally, the first backlight current adjustment sub-function satisfies:
[0059] ;
[0060] ;
[0061] Where: T is the temperature to be detected, and T satisfies (-∞, T1); where... The backlight current corresponding to T is... For the target backlight current, For the first backlight current, For the target temperature, This is the first temperature.
[0062] Optionally, the second backlight current adjustment sub-function satisfies:
[0063] ;
[0064] ;
[0065] Where: T is the temperature to be detected, and T satisfies (T0, +∞); The backlight current corresponding to T is... This is the third backlight current. The third temperature, For the target backlight current, The target temperature.
[0066] Understandably, by generating a two-stage backlight current adjustment sub-function, the backlight adjustment accuracy of the optical module can be further improved, making the optical power output of the optical module more stable.
[0067] As another implementation, a backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, including: fitting a quadratic function based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; and obtaining the target temperature and target backlight current corresponding to the lowest point of the quadratic function. If the first temperature < the target temperature < the second temperature < the third temperature, determine the first difference between the target temperature and the first temperature, and the second difference between the target temperature and the third temperature; if the first difference is less than the second difference, when the temperature is less than the target temperature, generate a first backlight current adjustment function based on the first temperature, the first backlight current, the target backlight current, and the target temperature; obtain the average value of the target temperature and the third temperature to obtain a fourth temperature; obtain the fourth backlight current corresponding to the fourth temperature based on the quadratic function; when the temperature is greater than the target temperature and less than the fourth temperature, generate a second backlight current adjustment function based on the target backlight current, the target temperature, the fourth temperature, and the fourth backlight current; when the temperature is the fourth temperature, generate a third backlight current adjustment function based on the fourth temperature, the fourth backlight current, the third temperature, and the third backlight current.
[0068] Optionally, the first backlight current adjustment sub-function satisfies:
[0069] ;
[0070] ;
[0071] Where: T is the temperature to be detected, and T satisfies (-∞, T0); The backlight current corresponding to T is... For the first backlight current, For the target backlight current, For the target temperature, This is the first temperature.
[0072] Optionally, the second backlight current adjustment sub-function satisfies:
[0073] ;
[0074] ;
[0075] Where: T is the temperature to be detected, and T satisfies (T0, T4); The backlight current corresponding to T is... This is the fourth backlight current. For the target backlight current, For the target temperature, This is the fourth temperature.
[0076] Optionally, the third backlight current adjustment sub-function satisfies:
[0077] ;
[0078] ;
[0079] Where: T is the temperature to be detected, and T satisfies (T₄, +∞); where... The backlight current corresponding to T is... This is the fourth backlight current. This is the third backlight current. The third temperature, This is the fourth temperature.
[0080] Understandably, by generating a three-segment backlight current adjustment sub-function, the backlight adjustment accuracy of the optical module can be further improved, making the optical power output of the optical module more stable.
[0081] As another implementation, a backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, including: fitting a quadratic function based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; and obtaining the target temperature and target backlight current corresponding to the lowest point of the quadratic function. If the first temperature < the target temperature < the second temperature < the third temperature, obtain a fourth temperature and a fifth temperature; wherein the fourth temperature is equal to the average of the target temperature and the third temperature; the fifth temperature is equal to the average of the target temperature and the first temperature; obtain the fourth backlight current and the fifth backlight current corresponding to the fourth temperature and the fifth temperature respectively according to the quadratic function; when the temperature is less than the fifth temperature, generate a first backlight current adjustment sub-function according to the first temperature, the first backlight current, the fifth temperature, and the fifth backlight current; when the temperature is greater than the fifth temperature and less than the target temperature, generate a second backlight current adjustment sub-function according to the fifth temperature, the fifth backlight current, the target backlight current, and the target temperature; when the temperature is greater than the target temperature and less than the fourth temperature, generate a third backlight current adjustment sub-function according to the fourth temperature, the fourth backlight current, the target backlight current, and the target temperature; when the temperature is greater than the fourth temperature, generate a fourth backlight current adjustment sub-function according to the fourth temperature, the fourth backlight current, the third backlight current, and the third temperature.
[0082] Optionally, the first backlight current adjustment sub-function satisfies:
[0083] ;
[0084] ;
[0085] Where: T is the temperature to be detected, and T satisfies (-∞, T₅); where... The backlight current corresponding to T is... For the first backlight current, This is the fifth backlight current. The first temperature, It is the fifth temperature.
[0086] Optionally, the second backlight current adjustment sub-function satisfies:
[0087] ;
[0088] ;
[0089] Where: T is the temperature to be detected, and T satisfies (T5, T0); The backlight current corresponding to T is... For the target backlight current, This is the fifth backlight current. For the target temperature, It is the fifth temperature.
[0090] Optionally, the third backlight current adjustment sub-function satisfies:
[0091] ;
[0092] ;
[0093] Where: T is the temperature to be detected, and T satisfies (T0, T4); The backlight current corresponding to T is... This is the fourth backlight current. For the target backlight current, For the target temperature, This is the fourth temperature.
[0094] Optionally, the fourth backlight current adjustment sub-function satisfies:
[0095] ;
[0096] ;
[0097] Where: T is the temperature to be detected, and T satisfies (T₄, +∞); where... The backlight current corresponding to T is... This is the fourth backlight current. This is the third backlight current. The third temperature, This is the fourth temperature.
[0098] Understandably, by generating a four-segment backlight current adjustment sub-function, the backlight adjustment accuracy of the optical module can be further improved, making the optical power output of the optical module more stable.
[0099] Step S203: The optical module adjusts the drive current until the current backlight current is within the threshold range of the ideal backlight current.
[0100] In one possible embodiment, the threshold range is the ideal backlight current. .
[0101] It is understandable that when the backlight current adjustment function in the backlight current adjustment method changes, different sub-functions are selected based on temperature to output the corresponding ideal backlight current.
[0102] Based on the same inventive concept, this application also provides an optical module, wherein the optical module uses the backlight current adjustment method of the above-mentioned optical module to adjust the backlight current.
[0103] Furthermore, this embodiment also provides a computer-readable storage medium storing a computer program, which, when run by a processing device, executes the steps of any of the backlight current adjustment methods for optical modules provided in the above embodiments.
[0104] The computer program product of the backlight current adjustment method for an optical module provided in this application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.
[0105] It should be noted that the above embodiments can be implemented, in whole or in part, by software, hardware (such as circuits), firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.
[0106] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.
[0107] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be a single item or multiple items.
[0108] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0109] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0110] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0111] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0112] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0113] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0114] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
Claims
1. A method for adjusting the backlight current of an optical module, characterized in that, The method includes: When the optical module detects the current temperature, it outputs an ideal backlight current according to a preset backlight current adjustment function; wherein, the backlight current adjustment function includes temperature parameters and backlight current parameters. The optical module adjusts the drive current until the current backlight current is within the threshold range of the ideal backlight current.
2. The method according to claim 1, characterized in that, The preset backlight current adjustment function is generated in the following ways: The optical module acquires the first optical power and the first backlight current corresponding to the first optical power at the first temperature. The second optical power of the optical module and the second backlight current corresponding to the second optical power are collected at a second temperature, wherein the second temperature is greater than the first temperature, and the second optical power plus a first threshold equals the first optical power; The third optical power of the optical module at a third temperature and the third backlight current corresponding to the third optical power are collected; wherein, the third temperature is greater than the second temperature; the third optical power plus the first threshold equals the first optical power; A backlight current adjustment function is generated based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current.
3. The method according to claim 1 or 2, characterized in that, The first threshold is zero.
4. The method according to claim 1 or 2, characterized in that, The first threshold is .
5. The method according to claim 2, characterized in that, The step of generating a backlight current adjustment function based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current includes: A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; the quadratic function serves as the backlight current adjustment function.
6. The method according to claim 2, characterized in that, Based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, a backlight current adjustment function is generated, including: A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; Obtain the target temperature and target backlight current corresponding to the lowest point of the quadratic function; If the first temperature < the target temperature < the second temperature < the third temperature, the temperature to be removed that is closest to the target temperature is removed, and the temperature to be removed is the first temperature or the second temperature; If the temperature to be removed is the second temperature, when the temperature is lower than the target temperature, a first backlight current adjustment sub-function is generated based on the first temperature, the first backlight current, the target backlight current, and the target temperature. and, When the temperature is higher than the target temperature, a second backlight current adjustment sub-function is generated based on the third temperature, the third backlight current, the target backlight current, and the target temperature.
7. The method according to claim 2, characterized in that, Based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, a backlight current adjustment function is generated, including: A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; Obtain the target temperature and target backlight current corresponding to the lowest point of the quadratic function; If the first temperature < the target temperature < the second temperature < the third temperature, determine the first difference between the target temperature and the first temperature and the second difference between the target temperature and the third temperature; If the first difference is less than the second difference, when the temperature is less than the target temperature, a first backlight current adjustment sub-function is generated based on the first temperature, the first backlight current, the target backlight current, and the target temperature. The fourth temperature is obtained by averaging the target temperature and the third temperature. The fourth backlight current corresponding to the fourth temperature is obtained based on the quadratic function. When the temperature is greater than the target temperature and less than the fourth temperature, a second backlight current adjustment sub-function is generated based on the target backlight current, the target temperature, the fourth temperature and the fourth backlight current; At the fourth temperature, a third backlight current adjustment sub-function is generated based on the fourth temperature, the fourth backlight current, the third temperature, and the third backlight current.
8. The method according to claim 2, characterized in that, Based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current, a backlight current adjustment function is generated, including: A quadratic function is fitted based on the first temperature, the first backlight current, the second temperature, the second backlight current, the third temperature, and the third backlight current; Obtain the target temperature and target backlight current corresponding to the lowest point of the quadratic function; If the first temperature < the target temperature < the second temperature < the third temperature, then obtain a fourth temperature and a fifth temperature; wherein the fourth temperature is equal to the average of the target temperature and the third temperature; and the fifth temperature is equal to the average of the target temperature and the first temperature. The fourth backlight current and the fifth backlight current corresponding to the fourth temperature and the fifth temperature are obtained according to the quadratic function. When the temperature is lower than the fifth temperature, a first backlight current adjustment sub-function is generated based on the first temperature, the first backlight current, the fifth temperature, and the fifth backlight current. When the temperature is greater than the fifth temperature but less than the target temperature, a second backlight current adjustment sub-function is generated based on the fifth temperature and the fifth backlight current, the target backlight current and the target temperature; When the temperature is greater than the target temperature and less than the fourth temperature, a third backlight current adjustment sub-function is generated based on the fourth temperature, the fourth backlight current, the target backlight current, and the target temperature. When the temperature is higher than the fourth temperature, a fourth backlight current adjustment sub-function is generated based on the fourth temperature, the fourth backlight current, the third backlight current, and the third temperature.
9. The method according to claim 2, characterized in that, The threshold range is the ideal backlight current. .
10. An optical module, characterized in that, The optical module adjusts the backlight current using the backlight current adjustment method for optical modules as described in any one of claims 1-9.