Display device and method for display device to determine internal circuit operating bias
A display device and voltage technology, applied in static indicators, instruments, etc., can solve the problems of power loss, obvious power loss, excessive power, etc., and achieve the effect of reducing voltage supply, reducing power consumption, and voltage drop
Inactive Publication Date: 2014-03-19
BENQ CORP
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Problems solved by technology
However, although the method of increasing the cross-voltages Vce1-Vce4 can effectively absorb the voltage drop difference between the light source units 210a-210d, such a design will cause more unnecessary power consumption
Especially when the difference in voltage drop between the light source units 210a-210d is not obvious, the power consumption is relatively more obvious
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[0043] In the following text, several embodiments and drawings will be used to illustrate the concept of the present invention, wherein elements with the same reference numerals in different drawings represent similar operating principles and technical effects. Therefore, repetitive descriptions will be omitted in the following text. Furthermore, the different technical features mentioned in the different embodiments herein are not limited to this embodiment. In fact, within the reasonable scope of the present invention, a certain embodiment can be appropriately modified so that it has the unique technical features of other embodiments.
[0044] Please also refer to image 3 and Figure 4 , which respectively illustrate the flowchart corresponding to the first embodiment of the power control method of the present invention and the display device 400 to which it is applied. As shown in the figure, the power supply circuit part of the display device 400 includes (but is not l...
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The invention discloses a display device and a method for the display device to determine the internal circuit operating bias. The display device comprises a light source, a voltage conversion circuit, a target current circuit, a microcontroller and a feedback circuit. The voltage conversion circuit is used to convert an external power source into a direct-current power source to drive the light source, wherein a first voltage is outputted by the direct-current power source. When the target current circuit is biased into a preset working mode, the target current circuit is used to control the magnitude of the current flowing through the light source to make the current equal to a second current. The microcontroller is used to detect the value of a third current flowing through the light source and generate a first control signal according to the value of the third current. The feedback circuit is used to cause the voltage conversion circuit to adjust the first voltage according to the first control signal to make the first voltage greater than the minimum voltage value required for ?maintaining the third current equal to the second current?, so that the target current circuit can be biased into the preset working mode, and the electric energy consumed by the target current circuit can be reduced.
Description
[0001] This application is a divisional application of an invention patent application with an application date of September 16, 2011, an application number of 201110274630.4, and an invention title of "Power Control Method and Display Device". technical field [0002] The present invention relates to a power control method and a display device, in particular to a power control method for controlling the power supply of a light source of a display device and a related display device. Background technique [0003] Generally speaking, please refer to the structure of LCD figure 1 As shown, the liquid crystal display 100 includes a liquid crystal panel module 110 and a light source 120. The light source 120 is mainly used for providing light to the liquid crystal panel module 110, and the liquid crystal panel module 110 modulates the light according to the driving signal to generate an image. The light source 120 needs a relatively large DC voltage (about 50 volts) to drive, an...
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Inventor 陈世宾林信男黄气宝
Owner BENQ CORP