Power control unit and method for high-definition multimedia interface
A technology of power control device and multimedia interface, which is applied in the direction of TV, electrical components, color TV, etc., and can solve the problems of battery exhaustion, power loss, and affecting the use time of electronic devices, etc.
Active Publication Date: 2011-06-15
MEDIATEK INC
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Problems solved by technology
However, performing this voltage conversion incurs a loss of power
Especially, when the power source of the electronic device is a battery, such as a portable electronic device, such as a mobile phone, a digital player (digital player), a notebook computer, etc., this kind of power loss will also cause the power of the battery to be consumed quickly. exhausted, which seriously affects the use time of electronic devices
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[0013] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.
[0014] 1A is a block diagram showing a power control device 10a used in an HDMI interface according to an embodiment of the present invention, wherein the power control device 10a is used in a portable electronic device 1a, such as but not limited to a mobile phone, a digital player devices, notebook computers, digital mobile assistants (PDAs), etc. The portable electronic device 1a can be connected to an external device via an HDMI connector 13, such as digital display devices such as digital projectors, plasma TVs, and LCD TVs, so as to present digital audio and video in the HDMI standard output by the portable electronic device 1. signal. The power control device 10 a includes a voltage generation unit 11 a and a detection unit 12 . The voltage generation unit 11a is coupled to the power source 14 pro...
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This invention is a power supply control device and method for high definition multimedia interface (HDMI), which can save electricity and avoid the problem of the technical background. The power supply control device includes a voltage generating unit and a sensing unit. The voltage generating unit generates one of a first voltage value and a second voltage value at an output end based on a control signal. The output end is coupled to a power supply pin of the high definition multimedia interface. The second voltage value is in accordance with a supply voltage of the high definition multimedia interface. The sensing unit with an input end senses whether the voltage value of the input end is not smaller than a threshold voltage value so as to generate the control signal. The input end is coupled to a hot plug sensing pin of the high definition multimedia interface. And the threshold voltage value is in accordance with the first voltage value.
Description
technical field [0001] The present invention relates to a High-Definition Multimedia Interface (HDMI for short), especially to a power control device and method suitable for a High-Definition Multimedia Interface. Background technique [0002] High-definition Multimedia Interface (HDMI) is a transmission terminal designed for a new generation of multimedia audio-visual equipment, suitable for digital home appliances such as digital TV, DVD player, DVD recorder, personal video recorder (personal video recorder, PVR), video converter (Set-top Box) and other digital audio-visual products. The biggest feature of the HDMI interface is that it integrates video signals and audio signals for simultaneous transmission. Different from traditional video and audio separation transmission, HDMI uses uncompressed digital data transmission, which can effectively reduce signal interference and attenuation caused by digital and analog conversion. [0003] In the specification of the HDMI in...
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IPC IPC(8): H04N5/765
Inventor 蔡孟哲
Owner MEDIATEK INC