Power control system for display module including external DC-DC converter
View Patent ↗A power control system includes a display module for displaying an image in accordance with image data, a DC-DC converter being external to the display module and for applying power to the display module, a host for generating a control signal for controlling the display module and outputting the control signal through a signal output pin of signal input/output pins of the host, and a connector connected to the signal input/output pins and for applying the control signal to the DC-DC converter and the display module. The DC-DC converter is adapted to apply power to the display module according to the control signal. Accordingly, the number of signal input/output pins of the connector can be reduced.
1. A power control system comprising:
a display module for displaying an image in accordance with image data;
a DC-DC converter being external to the display module and for applying power to the display module;
a host comprising a plurality of signal input/output pins and for generating a control signal for controlling the display module and outputting the control signal through a single signal output pin of the signal input/output pins of the host; and
a connector connected to the signal input/output pins and for applying the control signal to the DC-DC converter and the display module,
wherein a frame signal for identifying a frame of image data is received from the single signal output pin by both the DC-DC converter and the display module and is applied as the control signal, and wherein the DC-DC converter is adapted to apply power to the display module according to the control signal.
2. The power control system of claim 1 , wherein the DC-DC converter comprises a logic circuit adapted to receive the control signal and to turn on or off the DC-DC converter in accordance with the control signal.
3. The power control system of claim 1 , wherein the host is adapted to adjust a pulse period of the frame signal and to turn on or off the DC-DC converter in accordance with the pulse period.
4. The power control system of claim 1 , wherein the host is adapted to adjust a number of pulses of the frame signal and to turn on or off the DC-DC converter in accordance with the number of pulses.
5. The power control system of claim 1 , wherein the display module is adapted to display an image when the DC-DC converter is turned on by the frame signal.
6. The power control system of claim 5 , wherein the display module comprises:
a display panel for displaying the image; and
a driving unit for driving the display panel in accordance with the received control signal.
7. The power control system of claim 6 , wherein the display panel comprises an organic light emitting display (OLED) panel.