Tsingtek Serial Lcd Display oled module

With red, green and blue LED as backlight to achieve segmetn color LCD display method

Let us talk about dot-matrix color LCD display method :
Common color dot-matrix Tsingtek Serial Lcd Display Module is , the principle is that each pixel is composed of red , green, and blue dots , the pixel is small ,
That the human eye can not distinguish between these three points consisting of pixels in space , the feeling is a point. Pixel color impression
This is the color of the superposition of three points , respectively, the control points of the three colors , the color of the pixel can be controlled .
In short, the basic principle of a dot-matrix LCD is a color space in close proximity to the use of different colors to achieve superposition .

Segment LCD display color pen How ?
We know that the pen strokes graphic lcd display module segment display are relatively large, did not take advantage of the close proximity in space like a dot-matrix color LCD
Superimposed to show color . So how to display color it? Can not be superimposed on the space , we can be superimposed on the use of time . For example, there
A red and green LED, the cycle of alternating red and green lights . When alternating slow, the human eye can see the color red LED for a while ,
One will be green , alternating . When alternating fast (eg alternating 60 times per second ) , who saw the brightness is a constant yellow.

Pen -segment LCD itself will not change the color , but you can block the light . Using red, green and blue LED backlight low temperature lcd display do segmetn rapid cycling
Alternating light red, green , and blue , the human eyes perceive is a white backlight . If you want a lcd graphic display modules  segment display red pen , then the backlight
When displayed alternately to blue, so that sum segment display ( ie, blocking light through ) , backlit display to green , but also to prevent the light through the sum segment . Only when
Backlit display to red , just shut sum segment that let light through . Thus , the extra segment where it succeeded in preventing the blue and green light so that only the red
Through color backlight , which sum segment on the show red. Blue and green and so on, can also be used to display more of red, green , and blue overlay
Colors, such as strokes , respectively, so that the red, green, and blue colors are passed, it shows a white color lcd display module .

If the control section of the light pen is only the opening and closing of two states , no other intermediate half-open state,
You can display 8 colors : red, green, blue , cyan, yellow, purple , black, white .

If you adjust the strokes of each color of light through time ( for example, when only a part-time translucent transparent ) , you can do more colors , but no
Necessary . Because this is segmetn LCD, not a dot-matrix LCD, generally do not require excessive gentle colors , naturally not need to show much color, 8 colors enough.

LCD driver static and dynamic drive in two ways, in the absence of a dedicated IC cases, the use of static drive to achieve segmetn color LCD display is relatively simple .
Static drive requires a lot of pins, so the display can be used when little strokes