Pixel unit having a plurality of green LED elements and display module
In order to maintain the white balance ratio of the mixed white light, a pixel unit is provided, which is composed of four sub-pixels of red, green, blue, and another green colors, and these sub-pixels are composed of a red LED element, a first green LED element, a blue LED element and a second green LED element. A control element is used to control the four sub-pixels of red, first green, blue and second green correspondingly by outputting control signals through the control channels. Base on the adjustment of the current, the brightness ratio of the above three colors is still maintained at the ratio of 3:6:1 of the white balance, and the ratio of the white balance of the white light after being mixed is also maintained.
1 . A pixel unit composed of a red sub-pixel, a plurality of green sub-pixels, and a blue sub-pixel, comprising:
a plurality of LED elements comprising a red LED element, a plurality of green LED elements, and a blue LED element; and
a control element generating control signals through control channels to the red LED element, the plurality of green LED elements, and the blue LED element so the plurality of LED elements are turned to the red sub-pixel, the plurality of green sub-pixels, and the blue sub-pixel respectively;
wherein a number of the plurality of the control channels is identical to a number of the plurality of green LED elements,
wherein the control channels include a first control channel and a second control channel,
wherein the control signals include a first signal, a second signal, and a third signal, and
wherein each of the first channel and the second channel outputs a first signal for controlling the red sub-pixel, a second signal for controlling the blue sub-pixel, and a third signal for controlling the green sub-pixels respectively.
2 . The pixel unit as claimed in claim 1 , wherein the green sub-pixels includes a first green sub-pixel and a second green sub-pixel, the first green sub-pixel receives the third signal of the first channel, and the second green sub-pixel receives the third signal of the second channel respectively.
3 . The pixel unit as claimed in claim 1 , wherein the red sub-pixel receives the first signal of the first channel and the first signal of the second channel.
4 . The pixel unit as claimed in claim 1 , wherein the blue sub-pixel receives the second signal of the first channel and the second signal of the second channel.
5 . The pixel unit as claimed in claim 1 , wherein a brightness ratio of the red LED element, the plurality of green LED elements, and the blue LED element is 3:6:1.
6 . A display module, comprising:
a plurality of pixel units as claimed in claim 1 , when each of the pixel units comprises N green LED elements to form a square array in pairs wherein N equals to 4 or 6.
7 . The display module as claimed in claim 6 , wherein the square array comprises a partition line, and numbers of the LED elements on both sides of the partition line are equal.
8 . The display module as claimed in claim 6 , wherein a partition line is between the control channels corresponding to the square array, the control channels are divided by the partition line to two groups independently controlled by the corresponding control elements, respectively.