Touch screen panel, electronic notebook, and mobile terminal

• US 10,379,662 B2
• Filed: 08/28/2015
• Issued: 08/13/2019
• Est. Priority Date: 09/05/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Joo Ho, Roh, Hee Yuel, Otsuka, Tatsuhiro, Oh, Seok Min, Lee, Kang Min, Chung, Jun Sung, Jung, Ji Su, Jo, Hyun Geun, Han, Chul Ho
• Primary Examiner(s): Eurice, Michael J
• Application Number:
  US15/509,064
• Publication Number:
  US 20170285849A1
• Time in Patent Office: 1,446 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G02F 1/13473 for wavelength filtering or for colour display without the use of colour mosaic filters
• CPC Class Codes: G02F 1/13478 based on selective reflection
• CPC Class Codes: G02F 1/13718 based on a change of the texture state of a cholesteric liquid crystal
• CPC Class Codes: G02F 2201/343 cholesteric liquid crystal reflector
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 1/1675 Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
• CPC Class Codes: G06F 1/1692 the I/O peripheral being a secondary touch screen used as control interface, e.g. virtual buttons or sliders
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H04M 1/0235 : Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
• CPC Class Codes: H04M 1/0266 : for a display module assembly
• CPC Class Codes: H04M 2250/16 : including more than one display unit
• CPC Class Codes: H04M 2250/22 : including a touch pad, a touch sensor or a touch detector digitizers for touch screens G06F3/041
• CPC Class Codes: H10K 2102/3031 : Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 50/828 : Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/40 : OLEDs integrated with touch screens

Abstract

A touch screen panel may include a liquid crystal, a first transparent electrode and a second transparent electrode provided at both sides of the liquid crystal, and a controller configured to transfer image data to the first transparent electrode and the second transparent electrode in a first mode and sense a touch of a user on at least one of the first transparent electrode and the second transparent electrode in a second mode.

Claims

1. A touch screen panel comprising:

a liquid crystal having a first side and a second side;

a plurality of first transparent electrodes provided at the first side of the liquid crystal and extending along a first direction;

a plurality of second transparent electrodes provided at the second side of the liquid crystal and extending along a second direction perpendicular to the first direction, where the plurality of first transparent electrodes are coplanar, the plurality of second transparent electrodes are coplanar and a plurality of pixels are formed at portions at which the plurality of first transparent electrodes intersect with the plurality of second transparent electrodes; and

a controller configured to,

in a first mode, perform control so that image data is transferred to the plurality of first transparent electrodes and a scan signal is transferred to the plurality of second transparent electrodes, to thereby display an image corresponding to the image data on the touch screen panel, and

in a second mode, perform control so that a sensing signal is transferred to the plurality of first transparent electrodes and, in response to the transferred sensing signal, a response signal is received from the plurality of second transparent electrodes, to thereby sense a touch of a user on the touch screen panel.

2. The touch screen panel of claim 1, wherein, in the first mode, the controller performs control so that the scan signal is provided to the plurality of second transparent electrodes in a predetermined order and the image data is provided to the plurality of first transparent electrodes.

3. The touch screen panel of claim 1, wherein the liquid crystal is a cholesteric liquid crystal.

4. The touch screen panel of claim 1, wherein the liquid crystal is a nematic liquid crystal.

5. The touch screen panel of claim 1, further comprising:

a first transparent substrate to which the plurality of first transparent electrodes is attached; and

a second transparent substrate to which the plurality of second transparent electrodes is attached.

6. The touch screen panel of claim 1, wherein the touch screen panel is configured so that:

the liquid crystal blocks light when a voltage less than a first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes; and

the liquid crystal transmits the light when a voltage equal to or higher than the first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes.

7. The touch screen panel of claim 6, further comprising a back light configured to emit light.

8. The touch screen panel of claim 1, wherein, in the second mode, the controller performs control so that the sensing signal is provided to the plurality of first transparent electrodes in a predetermined order and the response signal is received from the plurality of second transparent electrodes.

9. The touch screen panel of claim 8, wherein, in the second mode, the controller performs control so that the touch of the user is sensed based on a change of an electrical resistance between the plurality of first transparent electrodes and the plurality of second transparent electrodes.

10. The touch screen panel of claim 8, wherein, in the second mode, the controller performs control so that the touch of the user is sensed based on a change of a capacitance between the plurality of first transparent electrodes and the plurality of second transparent electrodes.

11. The touch screen panel of claim 1, wherein the touch screen panel is configured so that:

the liquid crystal is in a first state in which light is transmitted when a voltage equal to or higher than a first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes; and

the liquid crystal is in a second state in which light is reflected when a voltage less than the first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes.

12. The touch screen panel of claim 11, wherein the touch screen panel is configured so that, after the liquid crystal transitions to the first state or the second state, the liquid crystal maintains the transitioned to state.

13. The touch screen panel of claim 12, further comprising an optical absorption layer configured to absorb light transmitted through the liquid crystal.

14. An electronic notebook comprising:

an electronic paper; and

a main body coupled to the electronic paper, wherein;

the electronic paper includes;

a liquid crystal having a first side and a second side,

a plurality of first transparent electrodes provided at the first side of the liquid crystal and extending along a first direction, and

a plurality of second transparent electrodes provided at the second side of the liquid crystal and extending along a second direction perpendicular to the first direction, where the plurality of first transparent electrodes are coplanar, the plurality of second transparent electrodes are coplanar and a plurality of pixels are formed at portions at which the plurality of first transparent electrodes intersect with the plurality of second transparent electrodes; and

the main body includes an electronic paper driver configured to,

in a first mode, perform control so that a sensing signal is transferred to the plurality of first transparent electrodes and, in response to a touch input on the electronic paper by a user, a response signal is received from the plurality of second transparent electrodes, to thereby sense the touch input on the electronic paper, and,

in a second mode, perform control so that image data for an image corresponding to the sensed touch input is transferred to the plurality of first transparent electrodes and a scan signal is transferred to the plurality of second transparent electrodes, to thereby display the image corresponding to the sensed touch input on the electronic paper.

15. The electronic notebook of claim 14, wherein:

the electronic paper includes a first page and a second page; and

each of the first page and the second page are configured to sense a touch input of the user and to display an image corresponding to the touch input.

16. The electronic notebook of claim 14, wherein the electronic paper is configured to be separable from the main body.

17. The electronic notebook of claim 16, wherein the electronic paper is configured so that the displayed image does not disappear when the electronic paper is separated from the main body.

18. The electronic notebook of claim 17, wherein the electronic notebook is configured so that:

the liquid crystal is in a first state in which light is transmitted when a voltage equal to or higher than a first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes; and

the liquid crystal is in a second state in which light is reflected when a voltage less than the first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes.

19. The electronic notebook of claim 18, wherein the electronic notebook is configured so that, after the liquid crystal transitions to the first state or the second state, the liquid crystal maintains the transitioned state.

20. The electronic notebook of claim 19, wherein the liquid crystal is a cholesteric liquid crystal.

21. A mobile terminal comprising:

a main display;

a touch screen positioned in front of the main display, and including;

a liquid crystal having a first side and a second side,

a plurality of first transparent electrodes provided at the first side of the liquid crystal and extending along a first direction, and

a plurality of second transparent electrodes provided at the second side of the liquid crystal and extending along a second direction perpendicular to the first direction, where the plurality of first transparent electrodes are coplanar, the plurality of second transparent electrodes are coplanar and a plurality of pixels are formed at portions at which the plurality of first transparent electrodes intersect with the plurality of second transparent electrodes; and

a controller configured to,

when the main display is turned ON, perform control so that

a sensing signal is transferred to the plurality of first transparent electrodes,

in response to the transferred sensing signal, a response signal is received from the plurality of second transparent electrodes, to thereby sense a touch input on the touch screen,

the main display displays information corresponding to the sensed touch input, and

the touch screen transmits light therethrough so that the information displayed on the main display is visible through the touch screen, and

when the main display is turned OFF, perform control so that

a sensing signal is transferred to the plurality of first transparent electrodes,

in response to the transferred sensing signal, a response signal is received from the plurality of second transparent electrodes, to thereby sense a touch input on the touch screen,

a scan signal is transferred to the plurality of second transparent electrodes, and

image data for an image corresponding to the sensed touch input is transferred to the plurality of first transparent electrodes, to thereby display the image corresponding to the sensed touch input on the touch screen.

22. The mobile terminal of claim 21, wherein the touch screen includes a reflective display.

23. The mobile terminal of claim 21, wherein the touch screen is configured so that the image displayed on the touch screen does not disappear when power supplied to the touch screen is interrupted.

24. The mobile terminal of claim 21, wherein the mobile terminal is configured so that:

the liquid crystal is in a first state in which light is transmitted when a voltage equal to or higher than a first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes; and

the liquid crystal is in a second state in which light is reflected when a voltage less than the first reference voltage is applied between the plurality of first transparent electrodes and the plurality of second transparent electrodes.

25. The mobile terminal of claim 24, wherein the mobile terminal is configured so that, after the liquid crystal transitions to the first state or the second state, the liquid crystal maintains the transitioned state.

26. The mobile terminal of claim 25, wherein the liquid crystal is a cholesteric liquid crystal.