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US 2006/0139344 A1Published application
Display monitor with a common display data channel
AssigneeTatung Co., Ltd.
InventorShih-Hua Tseng
Life of this patent
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Abstract
A display monitor for a common display data channel uses a DDC access switch to separate the common display data channel, so that regardless of whether the display monitor is powered on or off, a personal computer can access the Extended Display Identification Data (EDID) in the EEPROM, and the low-level voltage of an MCU in the display monitor won't interfere in the access between the personal computer and the EEPROM. When the power of the display monitor is turned on, the DDC access switch closes so that the MCU can access the EDID in the EEPROM.
Claims5
A display monitor with a common display data channel comprising:
- a first channel connected to a computer host;
- a second channel connected to a microprocessor;
- a display monitor power supply;
- a memory device connected to the first channel so the computer host is capable of accessing the memory device via the first channel;
- a DDC access switch connected to the first channel, the second channel, and the power supply;
- wherein when the display monitor power supply is turned on, the first channel and the second channel are provided power;
- and
- a microprocessor connected to the second channel and the power supply;
- wherein when the display monitor power supply is turned on, the microprocessor is capable of accessing the memory device via the second channel to the first channel by using the DDC access switch.
6 more elements
Dependencies are inferred from the claim text.