Document Parsing and Chunking for Optoelectronics Investment

Data Characteristics of This Category

Investment research data for the optoelectronics industry comes from industry research reports, patent documents, publicly available supply chain vendor documents, panel price weekly reports, and device specification sheets. Update frequencies vary significantly. Supply chain shipment and price data updates daily or weekly. Technical white papers and patent documents update per project or quarterly. Document formats include PDF research reports with multiple charts, structured Excel shipment tables, Word technical documents with parameter tables, and web-based industry updates. Fields include panel resolution, refresh rate, color gamut value, luminous efficacy and power consumption of optoelectronic devices. Units include pixels, Hz, %, lm/W, W, and others. Some documents contain nested multi-level tables and formulas.

Constraints for Document Parsing and Chunking

Multi-chart PDF research reports embed panel parameter charts and yield bar graphs. Parsing processes must extract both text and image OCR results to avoid missing visualized data. Structured Excel shipment tables may have multiple nested sheets and merged cells across rows and columns. Parsing must retain table structure instead of splitting into plain text, to prevent separation of parameters and their corresponding values. Long technical white papers include continuous parameter derivation formulas and hierarchical technical descriptions. Chunking must retain contextual connections to avoid truncating cross-page parameter definitions. Documents with multiple coexisting units require chunking to bind parameter names and their corresponding units, to prevent mismatches between values and units during subsequent retrieval.

Configuration Settings

Configuration Item	Recommended Value	Rationale
`OCR_ENABLE`	`Enabled`	Optoelectronics documents often contain visualized parameter content such as panel specification charts and yield bar graphs. Extracting text and numerical values from images prevents missing critical investment research data
`Chunk size`	`800–1200 characters`	Optoelectronics investment research documents often include continuous parameter descriptions and value-bound units. This chunk length retains complete parameter context, and meets retrieval requirements for technical parameter paragraphs
`Table Parsing Mode`	`Retain structured format`	Supply chain data for optoelectronics is mostly stored in Excel tables with multiple sheets and merged cells. Retaining structured format prevents separation of parameters and their corresponding values
`Chunk Overlap Rate`	`10–15%`	Some technical white papers include cross-page parameter derivation content. This overlap rate ensures retrieval continuity for continuous technical descriptions
`PARSE_FILE_TIMEOUT_SECONDS`	`600 seconds`	Long document parsing requires OCR, structure recognition, and chunking processing. This timeout adapts to parsing requirements for large research report collections
`UPLOAD_FILE_MAX_SIZE`	`500 MB`	Supports batch uploading of industry research report collections. This upper limit meets scenarios for bulk import of multiple documents

The parameter values provided on this page are common starting points for configuration setup. Actual values are affected by document format, data volume, and business rules. Specific scenarios require individual analysis. It is recommended to test against local samples before finalizing configurations.

Three Common Misconfigurations

Symptom: Only plain text is returned after uploading a PDF, and OCR results from embedded charts are not extracted. Cause: The OCR_ENABLE configuration item is not enabled, and only surface-level document text is parsed.
Symptom: Parameter and unit fragments appear after chunking, such as "refresh rate" as a separate chunk, and "144Hz" assigned to the next chunk. Cause: The chunk length is set too short, truncating the bound paragraph of parameters and units, or segment unit matching is not performed correctly.
Symptom: Uploaded Excel files with multiple sheets are parsed into unstructured plain text lists, and vendor names and shipment data from corresponding rows cannot be associated. Cause: The Table Parsing Mode configuration is not set to retain structured format, and table content is directly split into plain text.

How to Verify Correct Configuration

Upload a single-page PDF document with parameter charts. Check if the parsed text content includes numerical values and labels from the chart, to confirm the OCR_ENABLE configuration is active.
Upload an Excel file with multiple sheets. Check the field structure in the knowledge base data list, to confirm table column names and merged cell information are fully retained.
Submit a test text segment containing parameters and units. Check if chunked results retain the association between parameters and units in the same chunk, to verify the Chunk size and Chunk Overlap Rate configurations work as intended.
Upload a single industry research report collection larger than 200 MB. Confirm that the parsing task does not trigger a timeout error, to verify that the PARSE_FILE_TIMEOUT_SECONDS and UPLOAD_FILE_MAX_SIZE configurations meet requirements.

Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.