Flat panel display
View Patent ↗A flat panel display (FPD) with a reduced time required to change images between frames by improving waveforms of a selection signal and a drive signal. The FPD includes an electrode, an electrophoretic device with charged particles arranged in response to a data signal, and a transistor device controlling transmission of the data signal. An image frame includes a drive section in which the data signal is transmitted to the electrophoretic device to arrange the charged particles and display a grayscale image, and the data signal has a first pulse with a first voltage magnitude and a second pulse with a second voltage magnitude. The frame also includes a shake section for removing an image generated in a previous frame, and the selection signal transmitted to the transistor device during the shake section has a constant predetermined voltage and switches the transistor device on.
1. A flat panel display, comprising:
an electrode layer;
an electrophoretic device comprising charged particles arranged to display a predetermined grayscale in response to a data signal transmitted to the electrophoretic device through the electrode layer during a drive section of a frame; and
a transistor device to control transmission of the data signal to the electrophoretic device,
wherein the data signal has a first pulse with a first voltage magnitude corresponding to data information regarding the predetermined grayscale and a second pulse with a second voltage magnitude corresponding to data information regarding the predetermined grayscale, a duration of the first pulse being shorter than a duration of the second pulse,
wherein the first pulse is applied before the second pulse,
wherein the first pulse and the second pulse both have alternating polarities,
wherein the first pulse and the second pulse having the same polarity are consecutively applied, and
wherein the first voltage magnitude is greater than the second voltage magnitude.
2. The flat panel display of claim 1 , wherein the frame further comprises:
a shake section before the drive section, the shake section for removing an image generated in a previous frame; and
a bi-stable state section after the drive section, the bi-stable state section for stabilizing and maintaining the arrangement of the charged particles.
3. The flat panel display of claim 2 , wherein a selection signal transmitted to a gate terminal of the transistor device during the shake section has a constant predetermined voltage and switches the transistor device on.
4. The flat panel display of claim 1 , wherein the first pulse increases movement of the charged particles and the second pulse arranges the charged particles to generate the predetermined grayscale.
5. The flat panel display of claim 1 , wherein the charged particles are dispersed in a dielectric solvent.
6. The flat panel display of claim 5 , wherein a color of the charged particles is different than a color of the dielectric solvent.
7. The flat panel display of claim 1 , wherein the transistor device is an organic thin film transistor.
8. The flat panel display of claim 1 , wherein the flat panel display is an electrophoretic display.