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Expanded display recognition data and information writing method for high-resolution multimedia interface

A high-definition multimedia, extended display technology, applied in image communication, TV, electrical components, etc., to achieve the effect of saving hardware costs

Inactive Publication Date: 2009-07-08
KONKA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the defects of the flat panel display product detection method in the prior art, and propose a high-efficiency, low-cost, high-reliability HDMI EDID writing method, which can be applied to the flat panel display product manufacturing process

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  • Expanded display recognition data and information writing method for high-resolution multimedia interface

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Embodiment Construction

[0031] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] The method that the present invention proposes is: the EDID information of HDMI is directly written in the display flash memory FLASH, saves the E that stores EDID information on the traditional craft. 2 PROM chip.

[0033] The realization steps of the present invention are:

[0034] Set EDID information storage space: set aside a part of the flash memory to store EDID source file information;

[0035] Write the EDID source file information to the flash memory FLASH in binary format;

[0036] HDMI sender and receiver exchange configuration information through DDC;

[0037] Using the hot plug function of the HDMI interface, when the sending device detects that the HPD (Hot Plug Detect) signal is low, the data stored in the EDID at a certain position of the flash memory is read through the DDC channel;

[0038] Confirm the settings and functio...

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PUM

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Abstract

The present invention discloses an expanded display identification data information writing-into method of high definition multimedia interface. The method comprises the following steps: allocating one part of space in the flash memory of flat panel TV memory, writing the source information of expanded display identification data into the flash memory with a binary format, exchanging collocation information between a transmitting end and a receiving end of high definition multimedia interface through display data channel, confirming the setting and function displayed by the terminal of receiving end, determining the audio / video data transmission format between the transmitting end and the receiving end, and selecting the optimal matching video / audio display format. The invention does not require additionally an EPROM for storing the EDID information, realizes the same function with least component and saves the hardware cost. The invention is suitable to apply in the flat panel display field.

Description

technical field [0001] The invention relates to a method for writing extended display identification data information of a high-definition multimedia interface. Background technique [0002] In the detection of analog TV, the PC host and the display access the data in the memory through the DDC (Display DataChannel, display data channel) data line to determine the display properties (such as resolution, aspect ratio, etc.) information of the display. Similarly, in digital TV During the detection, the DDC data line of the HDMI (High Definition Multimedia Interface) interface is also used to access the EDID (Extended Display Identification DATA) memory to determine the relevant display attributes of the digital TV. [0003] EDID is a display format data specification for PC monitors formulated by VESA (Video Electronics Standards Association, that is, Video Electronics Standards Association), and is an important part of the HDMI interface. The sending end and receiving end of...

Claims

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Application Information

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IPC IPC(8): H04N17/00
Inventor 何银南
Owner KONKA GROUP
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