A display panel performance state evaluation and prediction method

Abstract

This invention discloses a method for evaluating and predicting the performance status of a display panel. When a display panel is first connected to the system or initialized, the method utilizes the built-in acquisition function of the display driver integrated circuit to establish and store a baseline profile of the panel's electrical characteristics. During the use of the display panel, the current electrical characteristics are periodically collected and compared with the baseline profile to obtain electrical offsets and change characteristics. Based on the electrical offsets, the method analyzes the panel's changing trends or characteristics and maps them to visual status or health indicators. It performs consistency comparison analysis on multiple panels from different batches, production lines, and suppliers to identify abnormal panels. Based on historical data, it performs change curve fitting and lifespan prediction. This invention requires no additional hardware and is applicable to all display terminal devices including LCDs and OLEDs that contain display driver circuits.

Description

Technical Field

[0001] This invention relates to the fields of display device technology, equipment condition monitoring technology, and quality management technology, specifically to a method for evaluating and predicting the performance status of display panels based on the electrical characteristics of display drivers, which can be applied to consumer electronic devices such as smartphones, tablets, laptops, and monitors. Background Technology

[0002] 2.1 Existing Technological Foundation Modern display driver ICs (DDICs) have integrated electrical data acquisition capabilities, including analog-to-digital converters (ADCs), analog front-end circuitry, and non-display period acquisition mechanisms. These functions have been applied in areas such as screen anti-counterfeiting authentication, display parameter compensation, and screen fault diagnosis.

[0003] 2.2 Limitations of Existing Technology Existing applications are mainly divided into two categories: (1) Real-time adjustment: dynamically adjusting screen output parameters according to current electrical parameters to maintain display effect. This falls under the category of "active intervention". (2) Identity authentication: judging the authenticity of the screen by comparing electrical characteristics. This falls under the category of "one-time identification". However, existing technologies do not use electrical data collection for: objectively assessing the long-term changes of the screen; predicting the expected lifespan of the screen; or supporting decision-making and planning for users and manufacturers.

[0004] 2.3 Innovation of this invention The core innovation of this invention lies in the fact that the same electrical data acquisition hardware can be used simultaneously for real-time adjustment (existing technology) and performance evaluation (this invention), which are fundamentally different. Existing technology: acquisition → instant calculation → real-time adjustment (single-moment, interventional); This invention: acquisition → historical benchmarking → trend analysis → evaluation (multi-moment, observational). Specific innovations include: a multi-time-period benchmarking system: establishing an initial benchmark profile, followed by periodic acquisition and benchmarking; mapping electrical offset to health status: mapping objective offsets into user-understandable indicators; group statistics and anomaly diagnosis: performing consistency comparisons on multiple screens in the same batch; change curve fitting and lifespan prediction: performing trend fitting and prediction based on historical data.

[0005] 2.4 Relationship between the present invention and the prior art This invention is completely complementary to existing technologies and does not conflict with them: Existing compensation technology vs. this invention - Method: Active adjustment vs. passive observation - Time: Real-time adjustment vs. historical benchmarking - Output: Display parameters vs. Evaluation indicators - Screen modification: Yes vs. No; Existing anti-counterfeiting authentication vs. this invention - Method: Identity determination vs. Performance change evaluation - Benchmarking: Single comparison vs. Multiple comparisons - Output: Binary determination vs. Quantitative indicators - Objective: Anti-counterfeiting vs. Performance evaluation. The essential difference between the two applications is that compensation technology focuses on real-time adjustment for single-moment data processing, while this invention focuses on long-term evaluation for trend analysis and prediction of historical data across multiple time periods. The application scenarios, processing methods, and output results are completely different, and they can coexist on the same device. Summary of the Invention

[0006] 3.1 Methodological Framework This invention comprises three essential, sequential steps: Step 1: Benchmark Establishment - Execution Timing: Initial device startup or initialization, screen module replacement, factory testing phase - Execution Content: Utilizing the DDIC's built-in acquisition function to collect electrical characteristics during non-display periods, establishing and storing the screen's electrical characteristic benchmark file; Step 2: Periodic Benchmarking and Change Analysis - Periodic Execution: The step of comparing the current electrical characteristics with the benchmark file is executed periodically - Acquisition Dimensions: At least one of driving voltage, driving current, channel impedance, and signal integrity - Acquisition Timing: Completed during non-display periods - Output: Electrical offset and change characteristics - Analysis: Analyzing the screen's change trend or characteristics based on the electrical offset; Step 3: Mapping and Evaluation - Mapping: Converting the change trend or characteristics into visual status or health indicators through a mapping function - Application: Supporting yield assessment, quality screening, health status evaluation, lifespan prediction, and full lifecycle traceability, etc.

[0007] 3.2 Key Features Screen replacement processing: When a screen is replaced, the baseline profile is automatically re-collected and updated; Batch and supplier comparison: Consistency comparison analysis is performed on different batches, production lines, and suppliers based on data from multiple screens; Lifespan prediction: Change curve fitting and lifespan prediction are performed based on historical change data; Full lifecycle traceability: Electrical characteristic baseline profiles are used to establish and maintain screen quality profiles, supporting full lifecycle traceability; Equipment application scope: This method is applicable to all display terminal devices such as liquid crystal displays (LCDs) and organic light-emitting diode displays (OLEDs) that contain display driver circuits. Expected results

[0008] 1. Objective quantitative assessment: Long-term change assessment based on electrical parameters; 2. Universal compatibility: Applicable to all display terminals containing driving circuits, such as LCD and OLED; 3. No hardware cost: Fully reuses DDIC's existing acquisition functions; 4. Full lifecycle management: Complete tracking from factory filing to disposal; 5. Lifespan prediction capability: Supports prediction of screen's expected lifespan; 6. Complementary to existing technologies: Does not conflict with anti-counterfeiting and compensation technologies, and can coexist with them.

Claims

1. A method for evaluating and predicting the performance status of a display panel, characterized in that, include: When the display panel is first connected to the system or initialized, the built-in acquisition function of the display driver integrated circuit is used to establish and store the electrical characteristic reference file of the panel. During the use of the display panel, the current electrical characteristics are collected and compared with the reference file to obtain the electrical offset and change characteristics; Based on the electrical offset and its variation characteristics, the changing trend or characteristics of the display panel are calculated or evaluated.

2. The method according to claim 1, characterized in that, The process of collecting current electrical characteristics and comparing them with a benchmark file is performed periodically.

3. The method according to claims 1-2, characterized in that, The electrical characteristics include at least one of the following: driving voltage, driving current, channel impedance, and signal integrity.

4. The method according to claims 1-3, characterized in that, The electrical characteristics were collected during non-display periods on the display panel.

5. The method according to claims 1-4, characterized in that, The changing trends or characteristics calculated or evaluated in step 3 of claim 1 are mapped to visual status or health indicators of the display panel through a mapping function.

6. The method according to claims 1-5, characterized in that, The health index obtained through the mapping can be used to achieve at least one of the following: yield assessment, quality screening, health status evaluation, lifespan prediction, or full life cycle traceability of the display panel.

7. The method according to claims 1-6, characterized in that, When the display panel is replaced, the electrical characteristic reference file is automatically re-acquired and updated.

8. The method according to claims 1-7, characterized in that, Based on the electrical characteristic data of multiple display panels, a consistency comparison analysis is conducted for different batches, different production lines, or different suppliers.

9. The method according to claims 1-8, characterized in that, Based on the electrical offset and trend data of at least multiple time points obtained by periodic acquisition as described in claim 1, the change law reflecting the performance change process of the display panel can be analyzed by mathematical fitting, statistical analysis or other scientific methods to predict the remaining service life or future state of the display panel.

10. The method according to claims 1-9, characterized in that, The electrical characteristic benchmark profile is used to establish and maintain the screen's quality profile, supporting full lifecycle traceability.

11. The method according to claims 1-10, characterized in that, This method is applicable to all display terminal devices, such as liquid crystal displays (LCDs) and organic light-emitting diode displays (OLEDs), which contain display driver circuits.