2D/3D switchable and touch sensitive display and method for driving the same

• US 9,058,780 B2
• Filed: 03/08/2013
• Issued: 06/16/2015
• Est. Priority Date: 03/08/2013
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Sumi, Naoki, Hashimoto, Kazuyuki, Araki, Toshihiko, Takahashi, Satoru
• Primary Examiner(s): SHENG, TOM V
• Application Number:
  US13/791,572
• Publication Number:
  US 20140253490A1
• Time in Patent Office: 830 Days
• Field of Search: 345/87, 345/173, 345/174, 349/15, 349/139, 349/143, 348/51, 348/54, 359/462
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3622 using a passive matrix G09G3/3674 - G09G3/3696 take precedence

Abstract

A 2D/3D switchable and touch sensitive display, comprising a display panel with a plurality of pixels and a LC cell is disclosed. The LC cell is disposed on the display panel for providing 2D/3D switchable and touch sensitive function. The LC cell comprises a first substrate and a second substrate opposite to each other, a plurality of first electrodes disposed on the first substrate, a plurality of second electrodes disposed on the second substrate, and a liquid crystal layer disposed between the first electrodes and the second electrodes. The second electrodes interlaced with the first electrodes. The liquid crystal layer is controlled by a voltage between the first electrodes and the second electrodes for adjusting light path from the display panel and/or touch sensing.

Claims

1. A 2D/3D switchable and touch sensitive display, comprising:

a display panel with a plurality of pixels, wherein the display panel comprises a LCD or an OLED; and

a LC cell disposed on the display panel for providing 2D/3D switchable and touch sensitive function, comprising;

a first substrate and a second substrate opposite to each other;

a plurality of first electrodes disposed on the first substrate, wherein the first electrodes are receivers of a touch sensor;

a plurality of second electrodes disposed on the second substrate, the second electrodes interlaced with the first electrodes, wherein the second electrodes are transmitters of the touch sensor; and

a liquid crystal layer disposed between the first electrodes and the second electrodes, wherein the liquid crystal layer is controlled by a voltage between the first electrodes and the second electrodes for adjusting light path from the display panel and/or touch sensing.

2. The 2D/3D switchable and touch sensitive display according to claim 1, wherein each of the first electrodes comprises a plurality of conductive lines arranged in parallel, and the conductive lines in each first electrode are electrically connected with each other.

3. The 2D/3D switchable and touch sensitive display according to claim 1, wherein the first electrodes are substantially orthogonal to the second electrodes.

4. The 2D/3D switchable and touch sensitive display according to claim 1, wherein a pitch of two adjacent first electrodes corresponds to at least two of the pixels of the display panel.

5. The 2D/3D switchable and touch sensitive display according to claim 1, wherein a DC signal is inputted into the first electrodes, and a plurality of first signals with a first amplitude are inputted to the second electrodes synchronously to control the liquid crystal layer for 2D/3D displaying, wherein the first amplitude is alternated with a first frequency.

6. The 2D/3D switchable and touch sensitive display according to claim 5, wherein the first amplitude in 3D mode is larger than the first amplitude in 2D mode, the first amplitude in 2D mode is lower than a modulus of the threshold voltage of the liquid crystal layer and larger than or equal to 0.

7. The 2D/3D switchable and touch sensitive display according to claim 5, wherein a plurality of second signals with a second amplitude are sequentially inputted into the second electrodes for touch sensing, the second amplitude is alternated with a second frequency, the first amplitude is larger than or equal to the second amplitude, and the second frequency is larger than or equal to the first frequency.

8. The 2D/3D switchable and touch sensitive display according to claim 7, wherein the second signals with the same duty cycle are separated from each other.

9. The 2D/3D switchable and touch sensitive display according to claim 7, wherein a sum of the second amplitude of a pair of the second signals within one of the first signal is equal to the first amplitude.

10. The 2D/3D switchable and touch sensitive display according to claim 5, wherein a plurality of second signals with a second amplitude are sequentially inputted into the first electrodes for touch sensing, the second amplitude is alternated with a second frequency, the first amplitude is larger than or equal to the second amplitude, and the second frequency is larger than or equal to the first frequency.

11. The 2D/3D switchable and touch sensitive display according to claim 10, wherein the second signals with the same duty cycle are separated from each other.

12. The 2D/3D switchable and touch sensitive display according to claim 10, wherein the a sum of the second amplitude of a pair of the second signals within one of the first signal is equal to the first amplitude.

13. The 2D/3D switchable and touch sensitive display according to claim 1, wherein a DC signal is inputted into the first electrodes, and a plurality of first signals with a first amplitude is inputted to the second electrodes sequentially to control the liquid crystal layer for 2D/3D displaying and touch sensing, wherein the first amplitude is alternated with a first frequency.

14. The 2D/3D switchable and touch sensitive display according to claim 13, wherein the first signals are switched to a plurality of second signals with a second frequency, the second frequency is less than the first frequency, a sum of the second amplitude of two sequential signals of the second signals is lower than a modulus of a threshold voltage of the liquid crystal layer and is larger than or equal to 0.

15. The 2D/3D switchable and touch sensitive display according to claim 14, wherein the second signals with the same duty cycle are separated to each other.

16. A method for driving a 2D/3D switchable and touch sensitive display, comprising:

providing a display panel and a LC cell disposed on the display panel, the LC cell comprising a first substrate and a second substrate opposite to each other, a plurality of first electrodes disposed on the first substrate, a plurality of second electrodes disposed on the second substrate and interlaced with the first electrodes, and a liquid crystal layer disposed between the first electrodes and second electrodes, each of the first electrodes comprises a plurality of conductive lines arranged in parallel, and the conductive lines in each of the first electrode are electrically connected with each other, wherein the display panel comprises a LCD or an OLED, and the first electrodes are receivers of a touch sensor and the second electrodes are transmitters of the touch sensor;

displaying an image by a display panel; and

driving the LC cell by providing a voltage between the first and second electrodes for controlling the liquid crystal layer to adjust a light path from the display panel and/or sensing a touch information.

17. The method for driving the 2D/3D switchable and touch sensitive display according to claim 16, wherein the step of driving the LC cell comprises:

providing a plurality of first signals having a first frequency to the second electrodes synchronously;

providing a plurality of second signals having a second frequency to the second electrodes sequentially, wherein the second frequency is larger than the first frequency; and

providing a DC signal to the first electrodes to control the liquid crystal layer between the first electrodes and the second electrodes for 2D/3D displaying and/or touch sensing.

18. The method for driving the 2D/3D switchable and touch sensitive display according to claim 16, wherein the step of driving the LC cell comprises:

providing a plurality of first signals having a first frequency to the second electrodes sequentially; and

providing a DC signal to the first electrodes to control the liquid crystal layer between the first electrodes and the second electrodes for 2D/3D displaying and/or touch sensing.