DISPLAY PANEL

• US 20150255030A1
• Filed: 03/05/2014
• Published: 09/10/2015
• Est. Priority Date: 03/05/2014
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: WATSUDA, Hirofumi, HAGINO, Shuji
• Granted Patent: US 9,190,005 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0404 Matrix technologies
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0478 related to liquid crystal pixels
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 2320/0219 Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3685 Details of drivers for data electrodes

Abstract

A display panel comprises a display area, a plurality of scan lines and data lines, a data driving circuit and a demultiplexing unit. The scan lines and the data lines cross each other within the display area. At least two of the data lines have different capacitances. The data driving circuit outputs a plurality of control signal and a data signal. The demultiplexing unit includes a plurality of thin-film transistors coupled with the data driving circuit and the data lines. The thin-film transistors receive the data signal and transmit the data signal to the correspondingly coupled data lines through channel layers of the thin-film transistors according to the control signals. The channel layers of at least two of the thin-film transistors coupled with the at least two data lines have different widths.

Claims

1. A display panel, comprising:

a display area,

a plurality of scan lines and data lines crossing each other within the display area, wherein at least two of the data lines have different capacitances;

a data driving circuit outputting a plurality of control signal and a data signal; and

a demultiplexing unit having a plurality of thin-film transistors coupled with the data driving circuit and the data lines, wherein the thin-film transistors receive the data signal and transmit the data signal to the correspondingly coupled data lines through channel layers of the thin-film transistors according to the control signals,

wherein the channel layers of at least two of the thin-film transistors coupled with the at least two data lines have different widths.

2. The display panel according to claim 1, wherein the display area is formed in a shape consisting of circle, shell, semicircle, oval, triangle, rhombus, trapezoid, polygon, or any combinations thereof.

3. The display panel according to claim 1, wherein each of the thin-film transistors (TFTs) has a control terminal receiving one of the control signals, an input terminal receiving the data signal and an output terminal outputting the data signal.

4. The display panel according to claim 3, wherein the data driving circuit is coupled with the control terminal of the TFT through a control signal line.

5. The display panel according to claim 3, wherein the data driving circuit is coupled with the input terminal of the TFT through a data signal line.

6. The display panel according to claim 5, wherein the data signal line is coupled with the input terminals of a plurality of TFTs.

7. The display panel according to claim 1, wherein the plurality of TFTs include a first TFT and a second TFT, and the plurality of data lines include a first data line coupled with the first TFT and a second data line coupled with the second TFT, wherein the capacitance of the second data line is greater than that of the first data line, and the width of the channel layer of the second TFT is greater than that of the first TFT.

8. The display panel according to claim 1, wherein the plurality of TFTs include a first TFT, a second TFT, and a third TFT, and the plurality of data lines include a first data line, a second data line, and a third data line coupled with the first, second, and third TFTs respectively, wherein the capacitance of the second data line is smaller than that of the third data line and is greater than that of the first data line, and the width of the channel layer of the second TFT is smaller than that of the third TFT and is greater than that of the first TFT.

9. The display panel according to claim 1, wherein the plurality of TFTs include a first TFT and a second TFT, and the plurality of data lines include a first data line coupled with the first TFT and a second data line coupled with the second TFT, wherein the length of the second data line is greater than that of the first data line, and the width of the channel layer of the second TFT is greater than that of the first TFT.

10. The display panel according to claim 1, wherein the plurality of TFTs include a first TFT, a second TFT, and a third TFT, and the plurality of data lines include a first data line, a second data line, and a third data line coupled with the first, second, and third TFTs respectively, wherein the length of the second data line is smaller than that of the third data line and is greater than that of the first data line, and the width of the channel layer of the second TFT is smaller than that of the third TFT and is greater than that of the first TFT.

11. The display panel according to claim 1, wherein the demultiplexing unit includes a plurality of TFT groups, wherein each of the TFT groups is composed of at least two TFTs with the channel layers having the same width.

12. The display panel according to claim 11, wherein the channel layers of the TFTs in the different TFT groups have different widths.

13. The display panel according to claim 11 further comprising at least one auxiliary capacitor, wherein one terminal of the auxiliary capacitor is coupled to the data line that is coupled with the corresponding TFT, and the other terminal thereof is coupled to an electrode.

14. The display panel according to claim 11 further comprising at least one auxiliary capacitor, wherein one terminal of the auxiliary capacitor is coupled to the data line that is coupled with the corresponding TFT, and the other terminal thereof is coupled to one of the control signal lines that is coupled with the corresponding TFT.

15. A display panel, comprising:

a display area,

a plurality of scan lines and data lines crossing each other within the display area, wherein at least two of the data lines have different capacitances;

a data driving circuit outputting a plurality of control signal and a data signal;

a demultiplexing unit having a plurality of thin-film transistors coupled with the data driving circuit and the data lines, wherein the thin-film transistors receive the data signal and transmit the data signal to the correspondingly coupled data lines according to the control signals; and

at least two auxiliary capacitors, wherein each of the at least two auxiliary capacitors is coupled to each of the at least two data lines, wherein the auxiliary capacitors have different capacitances.

16. The display panel according to claim 15, wherein one terminal of each of the auxiliary capacitors is coupled to the corresponding data line, and the other one terminal of each of the auxiliary capacitors is coupled to an electrode, and wherein the data line is insulated from the electrode.

17. The display panel according to claim 15, wherein each of the thin-film transistors (TFTs) has a control terminal receiving one of the control signals, an input terminal receiving the data signal, and an output terminal outputting the data signal.

18. The display panel according to claim 17, wherein the data driving circuit is coupled with the control terminal of the TFT through a control signal line.

19. The display panel according to claim 18, wherein one terminal of each of the auxiliary capacitors is coupled to the corresponding data line, and the other one terminal of each of the auxiliary capacitors is coupled to the control signal line, and wherein the data line is insulated from the control signal line.