VESA增强EDID实施指南：优化显示配置解答

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EDID (Extended Display Identification Data) Implementation Guide是Video Electronics Standards Association (VESA) 发布的一份文档，版本为1.0，版权日期为2001年。这份指南旨在帮助制造商在设计和解析显示器配置信息时，正确实施增强型EDID标准。EDID是一种数据结构，用于提供显示器的优化使用配置信息，包括分辨率、刷新率、色彩深度等关键特性，以便系统/图形板/软件能有效与显示器交互。该指南的主要目的是解答在实际应用中遇到的问题，这些问题可能来源于制造显示器的厂商（如何生成符合标准的EDID数据）和处理显示器数据的系统/硬件/软件供应商（如何解读接收到的EDID信息）。它详细阐述了如何根据VESA增强型EDID标准编写EDID数据，并提供了常见问题解答（FAQ），以确保所有参与方都能遵循标准操作流程。实施指南涵盖了以下关键知识点： 1. **标准定义**：指南首先介绍了增强型EDID标准，明确其数据结构和目的，即为了确保显示器配置信息的准确性和一致性。 2. **数据结构**：解释了数据块的组织结构，包括基础的EDID部分和扩展部分，以及它们各自包含的信息类型。 3. **制造者视角**：针对显示器制造商，指南涵盖了如何获取必要信息，如显示器规格、接口类型等，并指导如何编码这些信息到EDID中以实现兼容性。 4. **解析者视角**：对于系统和软件开发者，指南提供了解析EDID数据的方法，包括识别不同字段的意义，以及如何处理不同类型的显示器特性。 5. **常见问题解答**：包含了在实施过程中常见的疑问及其答案，帮助用户避免常见错误，确保了EDID数据的正确传输和处理。 6. **版本更新和合规性**：强调了该版本的更新时间和重要性，提醒读者使用最新版本的指南以符合当前的行业标准。通过阅读和遵循这份指南，制造商和系统集成者可以有效地实现EDID的正确实施，从而提升显示设备的性能表现和系统的稳定性。

VESA EDID Implementation Guide Version 1.0

Table of Contents

REVISION HISTORY................................................................................................................................................3

1. OVERVIEW ........................................................................................................................................................6

1.1 S

UMMARY ......................................................................................................................................................6

1.2 B

ACKGROUND ................................................................................................................................................6

1.3 S

TANDARD OBJECTIVES .................................................................................................................................6

2. DATA FORMATS...............................................................................................................................................7

2.1 D

ESCRIPTION OF PRESENT AND EARLIER EDID DATA FORMATS .....................................................................7

2.1.1 EDID 1.0 ...............................................................................................................................................7

2.1.2 EDID 1.1 ...............................................................................................................................................7

2.1.3 EDID 1.2 ...............................................................................................................................................7

2.1.4 EDID 1.3 ...............................................................................................................................................7

2.1.5 EDID 2.0 ...............................................................................................................................................7

2.2 E

NHANCED EDID...........................................................................................................................................7

2.3 EDID

FORMAT OVERVIEW.............................................................................................................................8

2.4 D

ATA FORMAT CONVENTIONS .......................................................................................................................9

3. CRITERIA FOR CREATING EDID..............................................................................................................10

3.1 H

EADER: 8 BYTES - OFFSET 00H-07H ...........................................................................................................10

3.1.1 Exact match of defined header data ....................................................................................................10

3.2 V

ENDOR/PRODUCT ID: 10 BYTES – OFFSET 08H-11H ...................................................................................10

3.2.1 Manufacture ID is valid.......................................................................................................................10

3.2.2 Product ID is valid ..............................................................................................................................10

3.2.3 Serial Number......................................................................................................................................10

3.2.4 Week of manufacture in valid range....................................................................................................10

3.2.5 Year of Manufacture in valid range ....................................................................................................10

3.3 EDID

STRUCTURE VERSION / REVISION: 2 BYTES – OFFSET 12H-13H ..........................................................11

3.3.1 EDID version number value is 1 .........................................................................................................11

3.3.2 Revision number in valid range...........................................................................................................11

3.4 B

ASIC DISPLAY PARAMETERS AND FEATURES: 5 BYTES – OFFSET 14H-18H.................................................11

3.4.1 Digital displays must follow video input definition .............................................................................11

3.4.2 Maximum Horizontal and Vertical Image Size in valid range ............................................................11

3.4.3 DPMS ..................................................................................................................................................11

3.4.4 Preferred Timing mode support in EDID Structure version 1 revision 3 ...........................................11

3.4.5 Preferred Timing mode support in all versions...................................................................................11

3.4.6 Default GTF support ...........................................................................................................................11

3.4.7 sRGB....................................................................................................................................................12

3.4.8 Phosphor or Filter Chromaticity: 10 bytes – offset 19h-22h ..............................................................12

3.5 E

STABLISHED TIMINGS: 3 BYTES – OFFSET 23H-25H ....................................................................................12

3.5.1 Established Timings verification .........................................................................................................12

3.6 S

TANDARD TIMING IDENTIFICATION: 16 BYTES – OFFSET 26H-35H..............................................................12

3.6.1 EDID Standard Timings verification...................................................................................................12

3.6.2 Unused areas of the standard timing section must be filled with 01h, 01h.........................................12

3.7 D

ETAILED TIMING SECTION - 72 BYTES – OFFSET 36H-7DH .........................................................................13

3.7.1 All blocks shall be filled with valid data..............................................................................................13

3.7.2 Timing data must represent a supported mode of the display.............................................................13

3.7.3 Ordering of blocks...............................................................................................................................13

3.7.4 Preferred timing in first block .............................................................................................................13

3.7.5 A Monitor Range Limits Descriptor provided.....................................................................................13

3.7.6 A Monitor Name Descriptor provided.................................................................................................13

3.7.7 ASCII string descriptors terminated properly.....................................................................................13

3.7.8 Manufacturer specific data types ........................................................................................................14

3.8 E

XTENSION FLAG AND CHECKSUM: 2 BYTES – OFFSET 7EH-7FH..................................................................14

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